Source Code

These source-code files are part of a reconstructed copy of LUM69 Revision 2, the flown Apollo 10 Lunar Module (LM) Apollo Guidance Computer (AGC) software.

The reconstruction began with source code of Luminary 69 revision 0 previously transcribed from a digitized copy of that program. The code was then updated by back-porting the R-2 lunar potential model from previously-transcribed source code of Luminary 99. These required changes were described in the original Luminary memos 75 and 78. The reconstructed code was verified by matching memory-bank checksums to those listed in drawing 2021152G. Note that page numbers in the reconstructed code match those on the Luminary 069 printout, although the added code would likely have changed page numbers for a real LUM69 Revision 2 listing.

Comments from the original source code are prefixed with a single '#' symbol, whereas comments added later are prefixed by "##" or "###". Report any errors noted by creating an issue report at the Virtual AGC project's GitHub repository.

034973,000002:                                                                                                  ## Copyright:   Public domain.
034974,000003:                                                                                                  ## Filename:    LUNAR_LANDING_GUIDANCE_EQUATIONS.agc
034975,000004:                                                                                                  ## Purpose:     A section of LUM69 revision 2.
034976,000005:                                                                                                  ##              It is part of the reconstructed source code for the flown
034977,000006:                                                                                                  ##              version of the flight software for the Lunar Module's (LM)
034978,000007:                                                                                                  ##              Apollo Guidance Computer (AGC) for Apollo 10. The code has
034979,000008:                                                                                                  ##              been recreated from a copy of Luminary revsion 069, using
034980,000009:                                                                                                  ##              changes present in Luminary 099 which were described in
034981,000010:                                                                                                  ##              Luminary memos 75 and 78. The code has been adapted such
034982,000011:                                                                                                  ##              that the resulting bugger words exactly match those specified
034983,000012:                                                                                                  ##              for LUM69 revision 2 in NASA drawing 2021152B, which gives
034984,000013:                                                                                                  ##              relatively high confidence that the reconstruction is correct.
034985,000014:                                                                                                  ## Reference:   pp. 802-828
034986,000015:                                                                                                  ## Assembler:   yaYUL
034987,000016:                                                                                                  ## Contact:     Ron Burkey <info@sandroid.org>.
034988,000017:                                                                                                  ## Website:     www.ibiblio.org/apollo/index.html
034989,000018:                                                                                                  ## Mod history: 2019-07-27 MAS  Created from Luminary 69.
034990,000019: 

Page 802

034992,000021: 31,2445  E7,1617                                  EBANK=   E2DPS                                 
034993,000022: 
034994,000023: 31,2445                                           COUNT*   $$/F2DPS                              
034995,000024: 
034996,000025:                                                                                                  #  ****************************************************************************************************************
034997,000026:                                                                                                  #  LUNAR LANDING FLIGHT SEQUENCE TABLES
034998,000027:                                                                                                  #  ****************************************************************************************************************
034999,000028: 
035000,000029:                                                                                                  #  FLIGHT SEQUENCE TABLES ARE ARRANGED BY FUNCTION.   THEY ARE REFERENCED USING AS AN INDEX THE REGISTER WCHPHASE:
035001,000030:                                                                                                  #                                                   WCHPHASE  =  -1  --->  IGNALG
035002,000031:                                                                                                  #                                                   WCHPHASE  =   0  --->  BRAKQUAD
035003,000032:                                                                                                  #                                                   WCHPHASE  =   1  --->  BRAKLING
035004,000033:                                                                                                  #                                                   WCHPHASE  =   2  --->  APPRQUAD
035005,000034:                                                                                                  #                                                   WCHPHASE  =   3  --->  APPRLING
035006,000035:                                                                                                  #                                                   WCHPHASE  =   4  --->  VERTICAL
035007,000036: 
035008,000037:                                                                                                  #  ***************************************************************************************************************
035009,000038: 
035010,000039:                                                                                                  #  ROUTINES FOR STARTING NEW GUIDANCE PHASES:
035011,000040: 
035012,000041: 31,2445           12657                           TCF      TTFINCR                               #  IGNALG
035013,000042: 31,2446           12657        NEWPHASE           TCF      TTFINCR                               #  BRAKQUAD
035014,000043: 31,2447           12643                           TCF      LINSET?                               #  BRAKLING
035015,000044: 31,2450           12627                           TCF      STARTP64                              #  APPRQUAD
035016,000045: 31,2451           12647                           TCF      LINSET                                #  APPRLING
035017,000046: 31,2452           12616                           TCF      P65START                              #  VERTICAL
035018,000047: 
035019,000048: 
035020,000049: 
035021,000050:                                                                                                  #  PRE-GUIDANCE COMPUTATIONS:
035022,000051: 
035023,000052: 31,2453           13025                           TCF      CALCRGVG                              #  IGNALG
035024,000053: 31,2454           13035        PREGUIDE           TCF      RGVGCALC                              #  BRAKQUAD
035025,000054: 31,2455           13035                           TCF      RGVGCALC                              #  BRAKLING
035026,000055: 31,2456           12725                           TCF      REDESIG                               #  APPRQUAD
035027,000056: 31,2457           13035                           TCF      RGVGCALC                              #  APPRLING
035028,000057: 31,2460           13035                           TCF      RGVGCALC                              #  VERTICAL
035029,000058: 
035030,000059: 
035031,000060:                                                                                                  #  GUIDANCE EQUATIONS:
035032,000061: 
035033,000062: 31,2461           13107                           TCF      TTF/8CL                               #  IGNALG
035034,000063: 31,2462           13107        WHATGUID           TCF      TTF/8CL                               #  BRAKQUAD
035035,000064: 31,2463           13101                           TCF      LINGUID                               #  BRAKLING
035036,000065: 31,2464           13107                           TCF      TTF/8CL                               #  APPRQUAD
035037,000066: 31,2465           13101                           TCF      LINGUID                               #  BRAKLING
035038,000067: 31,2466           13477                           TCF      VERTGUID                              #  VERTICAL
035039,000068: 

Page 803

035041,000070:                                                                                                  #  POST GUIDANCE EQUATION COMPUTATIONS:
035042,000071: 
035043,000072: 31,2467           13240                           TCF      CGCALC                                #  IGNALG
035044,000073: 31,2470           13240        AFTRGUID           TCF      CGCALC                                #  BRAKQUAD
035045,000074: 31,2471           13270                           TCF      LINXLOGC                              #  BRAKLING
035046,000075: 31,2472           13240                           TCF      CGCALC                                #  APPRQUAD
035047,000076: 31,2473           13270                           TCF      LINXLOGC                              #  APPRLING
035048,000077: 31,2474           13411                           TCF      EXVERT                                #  VERTICAL
035049,000078: 
035050,000079: 
035051,000080:                                                                                                  #  WINDOW VECTOR COMPUTATIONS:
035052,000081: 
035053,000082: 31,2475           13304                           TCF      EXGSUB                                #  IGNALG
035054,000083: 31,2476           13325        WHATEXIT           TCF      EXBRAK                                #  BRAKQUAD
035055,000084: 31,2477           13325                           TCF      EXBRAK                                #  BRAKLING
035056,000085: 31,2500           13333                           TCF      EXNORM                                #  APPRQUAD
035057,000086: 31,2501           13333                           TCF      EXNORM                                #  APPRLING
035058,000087: 
035059,000088: 
035060,000089:                                                                                                  #  DISPLAY ROUTINES:
035061,000090: 
035062,000091: 31,2502           13441        WHATDISP           TCF      P63DISPS                              #  BRAKQUAD
035063,000092: 31,2503           13441                           TCF      P63DISPS                              #  BRAKLING
035064,000093: 31,2504           13445                           TCF      P64DISPS                              #  APPRQUAD
035065,000094: 31,2505           13445                           TCF      P64DISPS                              #  APPRLING
035066,000095: 31,2506           13475                           TCF      VERTDISP                              #  VERTICAL
035067,000096: 
035068,000097: 
035069,000098:                                                                                                  #  INDICES FOR REFERENCING TARGET PARAMETERS:
035070,000099: 
035071,000100: 31,2507           00000                           OCT      0                                     #  IGNALG
035072,000101: 31,2510           00000        TARGTDEX           OCT      0                                     #  BRAKQUAD
035073,000102: 31,2511           00000                           OCT      0                                     #  BRAKLING
035074,000103: 31,2512           00030                           OCT      30                                    #  APPRQUAD
035075,000104: 31,2513           00030                           OCT      30                                    #  APPRLING
035076,000105: 
035077,000106: 
035078,000107:                                                                                                  #  ****************************************************************************************************************
035079,000108:                                                                                                  #  ENTRY POINTS:   2GUIDSUB FOR THE IGNITION ALGORITHM, LUNLAND FOR SERVOUT
035080,000109:                                                                                                  #  ****************************************************************************************************************
035081,000110: 
035082,000111:                                                                                                  #  IGNITION ALGORITHM ENTRY:  DELIVERS N PASSES OF QUADRATIC QUIDANCE
035083,000112: 
035084,000113: 31,2514           77776        ?GUIDSUB           EXIT                                           
035085,000114: 31,2515           34752                           CAF      TWO                                   #  N = 3
035086,000115: 31,2516           55645                           TS       NGUIDSUB                              
035087,000116: 31,2517           12600                           TCF      GUILDRET                              
035088,000117: 
035089,000118: 31,2520           55645        GUIDSUB            TS       NGUIDSUB                              #  ON SUCEEDING PASSES SKIP TTFINCR
035090,000119: 31,2521           13025                           TCF      CALCRGVG                              
035091,000120: 

Page 804

035093,000122: 
035094,000123:                                                                                                  #  NORMAL ENTRY:  CONTROL COMES HERE FROM SERVOUT
035095,000124: 
035096,000125: 31,2522           05353        LUNLAND            TC       PHASCHNG                              
035097,000126: 31,2523           00035                           OCT      00035                                 #  GROUP 5:  RETAIN ONLY PIPA TASK
035098,000127: 31,2524           05353                           TC       PHASCHNG                              
035099,000128: 31,2525           05023                           OCT      05023                                 #  GROUP 3:  PROTECT GUIDANCE WITH PRIO 21
035100,000129: 31,2526           21000                           OCT      21000                                 #        JUST HIGHER THAN SERVICER'S PRIORITY
035101,000130: 
035102,000131:                                                                                                  #  ****************************************************************************************************************
035103,000132:                                                                                                  #  GUILDENSTERN:  AUTO-MODES MONITOR (R13)
035104,000133:                                                                                                  #  ****************************************************************************************************************
035105,000134: 
035106,000135: 31,2527                                           COUNT*   $$/R13                                
035107,000136: 
035108,000137:                                                                                                  #     HERE IS THE PHILOSOPHY OF GUILDENSTERN:    ON EVERY APPEARANCE OR DISAPPEARANCE OF THE MANUAL THROTTLE
035109,000138:                                                                                                  #  DISCRETE TO SELECT P67 OR P66 RESPECTIVELY;   ON EVERY APPEARANCE OF THE ATTITUDE-HOLD DISCRETE TO SELECT P66
035110,000139:                                                                                                  #  UNLESS THE CURRENT PROGRAM IS P67 IN WHICH CASE THERE IS NO CHANGE.
035111,000140: 
035112,000141: 31,2527           00006        GUILDEN            EXTEND                                         #  IS UN-AUTO-THROTTLE DISCRETE PRESENT?
035113,000142: 31,2530           00030                           READ     CHAN30                                
035114,000143: 31,2531           74747                           MASK     BIT5                                  
035115,000144: 31,2532           10000                           CCS      A                                     
035116,000145: 31,2533           12564                           TCF      STARTP67                              #  YES
035117,000146: 31,2534           05321        P67NOW?            TC       CHECKMM                               #  NO:   ARE WE IN P67 NOW?
035118,000147: 31,2535           00103                           DEC      67         B-14                       
035119,000148: 31,2536           12570                           TCF      STABL?                                #  NO
035120,000149: 31,2537           03721        STARTP66           TC       FASTCHNG                              #  YES
035121,000150: 31,2540           05311                           TC       NEWMODEX                              
035122,000151: 31,2541           00102        DEC66              DEC      66         B-14                       
035123,000152: 31,2542           00006                           EXTEND                                         #  INITIALIZE VDGVERT USING
035124,000153: 31,2543           31625                           DCA      VGU                                   #    PRESENT DOWNWARD VELOCITY
035125,000154: 31,2544           53643                           DXCH     VDGVERT                               
035126,000155: 31,2545           34755                           CAF      ZERO                                  
035127,000156: 31,2546           55644                           TS       RODCOUNT                              
035128,000157: 31,2547           55645        VRTSTART           TS       WCHVERT                               
035129,000158: 31,2550           34751                           CAF      FOUR                                  #  WCHPHASE = 4 --> VERTICAL: P65,P66,P67
035130,000159: 31,2551           55617                           TS       WCHPHOLD                              
035131,000160: 31,2552           55620                           TS       WCHPHASE                              
035132,000161: 31,2553           04616                           TC       BANKCALL                              #  TEMPORARY, I HOPE HOPE HOPE
035133,000162: 31,2554           40165                           CADR     STOPRATE                              #  TEMPORARY, I HOPE HOPE HOPE
035134,000163: 31,2555           05516                           TC       DOWNFLAG                              #  PERMIT X-AXIS OVERRIDE
035135,000164: 31,2556           00311                           ADRES    XOVINFLG                              
035136,000165: 31,2557           05516                           TC       DOWNFLAG                              
035137,000166: 31,2560           00143                           ADRES    REDFLAG                               
035138,000167: 31,2561           05516                           TC       DOWNFLAG                              
035139,000168: 31,2562           00142                           ADRES    POUTFLAG                              #  PERMIT PULSE-OUTS
035140,000169: 31,2563           12600                           TCF      GUILDRET                              
035141,000170: 
035142,000171: 31,2564           05311        STARTP67           TC       NEWMODEX                              #  NO HARM IN "STARTING" P67 OVER AND OVER
035143,000172: 31,2565           00103                           DEC      67         B-14                       #    SO NO NEED FOR A FASTCHNG AND NO NEED
035144,000173: 

Page 805

035146,000175: 31,2566           34363                           CAF      TEN                                   #    TO SEE IF ALREADY IN P67
035147,000176: 31,2567           12547                           TCF      VRTSTART                              
035148,000177: 
035149,000178: 31,2570           34737        STABL?             CAF      BIT13                                 #  IS UN-ATTITUDE-HOLD DISCRETE PRESENT?
035150,000179: 31,2571           00006                           EXTEND                                         
035151,000180: 31,2572           02031                           RAND     CHAN31                                
035152,000181: 31,2573           10000                           CCS      A                                     
035153,000182: 31,2574           12600                           TCF      GUILDRET                              #  YES: ALL'S WELL
035154,000183: 31,2575           05321        P66NOW?            TC       CHECKMM                               #  NO:  ARE WE IN P66 NOW?
035155,000184: 31,2576           00102                           DEC      66         B-14                       
035156,000185: 31,2577           12537                           TCF      STARTP66                              #  NO
035157,000186: 
035158,000187:                                                                                                  #                                                (CONTINUE TO GUILDRET) YES
035159,000188: 
035160,000189:                                                                                                  #  ****************************************************************************************************************
035161,000190:                                                                                                  #  INITIALIZATION FOR THIS PASS
035162,000191:                                                                                                  #  ****************************************************************************************************************
035163,000192: 
035164,000193: 31,2600                                           COUNT*   $$/F2DPS                              
035165,000194: 
035166,000195: 31,2600           00006        GUILDRET           EXTEND                                         
035167,000196: 31,2601           31623                           DCA      TPIP                                  
035168,000197: 31,2602           53572                           DXCH     TPIPOLD                               
035169,000198: 
035170,000199: 31,2603           03721                           TC       FASTCHNG                              
035171,000200: 
035172,000201: 31,2604           00006                           EXTEND                                         
035173,000202: 31,2605           31557                           DCA      PIPTIME1                              
035174,000203: 31,2606           53623                           DXCH     TPIP                                  
035175,000204: 
035176,000205: 31,2607           00006                           EXTEND                                         
035177,000206: 31,2610           31641                           DCA      TTF/8                                 
035178,000207: 31,2611           53551                           DXCH     TTF/8TMP                              
035179,000208: 
035180,000209: 31,2612           11621                           CCS      FLPASS0                               
035181,000210: 31,2613           12657                           TCF      TTFINCR                               
035182,000211: 
035183,000212: 31,2614           51620        BRSPOT1            INDEX    WCHPHASE                              
035184,000213: 31,2615           12446                           TCF      NEWPHASE                              
035185,000214: 
035186,000215:                                                                                                  #  ****************************************************************************************************************
035187,000216:                                                                                                  #  ROUTINES TO START NEW PHASES
035188,000217:                                                                                                  #  ****************************************************************************************************************
035189,000218: 
035190,000219: 31,2616           05311        P65START           TC       NEWMODEX                              
035191,000220: 31,2617           00101                           DEC      65         B-14                       
035192,000221: 31,2620           44752                           CS       TWO                                   
035193,000222: 31,2621           55645                           TS       WCHVERT                               
035194,000223: 31,2622           05516                           TC       DOWNFLAG                              #  PERMIT X-AXIS OVERRIDE
035195,000224: 31,2623           00311                           ADRES    XOVINFLG                              
035196,000225: 

Page 806

035198,000227: 31,2624           05516        COMSTART           TC       DOWNFLAG                              
035199,000228: 31,2625           00142                           ADRES    POUTFLAG                              
035200,000229: 31,2626           12657                           TCF      TTFINCR                               
035201,000230: 
035202,000231: 
035203,000232: 31,2627           33743        STARTP64           CAF      DELTTFAP                              #  AUGMENT TTF/8 (TWO-PHASE ONLY)
035204,000233: 31,2630           27550                           ADS      TTF/8TMP                              
035205,000234: 31,2631           05311                 +2        TC       NEWMODEX                              
035206,000235: 31,2632           00100                           DEC      64         B-14                       
035207,000236: 31,2633           34752                           CAF      TWO                                   
035208,000237: 31,2634           55620                           TS       WCHPHASE                              
035209,000238: 31,2635           34740                           CA       BIT12                                 #  ENABLE RUPT10
035210,000239: 31,2636           00006                           EXTEND                                         
035211,000240: 31,2637           05013                           WOR      CHAN13                                
035212,000241: 31,2640           05516                           TC       DOWNFLAG                              #  INITIALIZE REDESIGNATION FLAG
035213,000242: 31,2641           00143                           ADRES    REDFLAG                               
035214,000243: 31,2642           12624                           TCF      COMSTART                              
035215,000244: 
035216,000245:                                                                                                  #  ****************************************************************************************************************
035217,000246:                                                                                                  #  SET LINEAR GUIDANCE COEFFICIENTS
035218,000247:                                                                                                  #  ****************************************************************************************************************
035219,000248: 
035220,000249: 31,2643           30102        LINSET?            CA       FLAGWRD6                              #  ONE-PHASE OR TWO-PHASE?
035221,000250: 31,2644           74743                           MASK     2PHASBIT                              
035222,000251: 31,2645           00006                           EXTEND                                         
035223,000252: 31,2646           12631                           BZF      STARTP64   +2                         #  ONE-PHASE: GO DIRECTLY TO APPROACH PHASE
035224,000253: 
035225,000254: 31,2647           03667        LINSET             TC       INTPRETX                              
035226,000255: 31,2650           51775                           VLOAD    VSU*                                  #  -        -     -
035227,000256: 31,2651           02271                                    ACG                                   #  JLING = (ACG - ADG)/TTF
035228,000257: 31,2652           02417                                    ADG,1                                 
035229,000258: 31,2653           70322                           VSR3     V/SC                                  
035230,000259: 31,2654           03551                                    TTF/8TMP                              #  TTF/8 NOT YET UPDATED
035231,000260: 31,2655           02277                           STORE    JLING                                 #  JLING IS IN UMITS OF 2(-18) M/CS/CS/CS
035232,000261: 31,2656           77776                           EXIT                                           
035233,000262: 
035234,000263:                                                                                                  #                                              (CONTINUE TO TTFINCR)
035235,000264: 
035236,000265:                                                                                                  #  ****************************************************************************************************************
035237,000266:                                                                                                  #  INCREMENT TTF/8, UPDATE LAND FOR LUNAR ROTATION, DO OTHER USEFUL THINGS
035238,000267:                                                                                                  #  ****************************************************************************************************************
035239,000268: 
035240,000269:                                                                                                  #             TTFINCR COMPUTATIONS ARE AS FOLLOWS:-
035241,000270: 
035242,000271:                                                                                                  #                       TTF/8 UPDATED FOR TIME SINCE LAST PASS:
035243,000272: 
035244,000273:                                                                                                  #                                  TTF/8 = TTF/8 + (TPIP - TPIPOLD)/8
035245,000274: 
035246,000275:                                                                                                  #                       LANDING SITE VECTOR UPDATED FOR LUNAR ROTATION:
035247,000276: 

Page 807

035249,000278:                                                                                                  #                                  -                  -      -                      -
035250,000279:                                                                                                  #                                  LAND = /LAND/ UNIT(LAND - LAND(TPIP - TPIPOLD) * WM)
035251,000280: 
035252,000281:                                                                                                  #                       SLANT RANGE TO LANDING SITE, FOR DISPLAY:
035253,000282: 
035254,000283:                                                                                                  #                                                   -      -
035255,000284:                                                                                                  #                                  RANGEDSP = ABVAL(LAND - R)
035256,000285: 
035257,000286: 31,2657           06036        TTFINCR            TC       INTPRET                               
035258,000287: 31,2660           45345                           DLOAD    DSU                                   
035259,000288: 31,2661           03623                                    TPIP                                  
035260,000289: 31,2662           03572                                    TPIPOLD                               
035261,000290: 31,2663           41461                           SLR      PUSH                                  #  SHIFT SCALES DELTA TIME TO 2(17) CSECS
035262,000291: 31,2664           21214                                    11D                                   
035263,000292: 31,2665           47361                           VXSC     VXV                                   
035264,000293: 31,2666           03633                                    LAND                                  
035265,000294: 31,2667           02331                                    WM                                    
035266,000295: 31,2670           47045                           BVSU     RTB                                   
035267,000296: 31,2671           03633                                    LAND                                  
035268,000297: 31,2672           21700                                    NORMUNIT                              
035269,000298: 31,2673           76561                           VXSC     VSL1                                  
035270,000299: 31,2674           02337                                    /LAND/                                
035271,000300: 31,2675           03543                           STORE    LANDTEMP                              
035272,000301: 31,2676           51451                           VSU      ABVAL                                 
035273,000302: 31,2677           03517                                    R                                     
035274,000303: 31,2700           16532                           STODL    RANGEDSP                              
035275,000304: 31,2701           77776                           EXIT                                           
035276,000305: 
035277,000306: 31,2702           52155                           DXCH     MPAC                                  
035278,000307: 31,2703           21551                           DAS      TTF/8TMP                              #  NOW HAVE INCREMENTED TTF/8 IN TTF/8TMP
035279,000308: 
035280,000309: 31,2704           03721                           TC       FASTCHNG                              
035281,000310: 
035282,000311: 31,2705           00006                           EXTEND                                         
035283,000312: 31,2706           31551                           DCA      TTF/8TMP                              
035284,000313: 31,2707           53641                           DXCH     TTF/8                                 
035285,000314: 
035286,000315: 31,2710           00006                           EXTEND                                         
035287,000316: 31,2711           31543                           DCA      LANDTEMP                              
035288,000317: 31,2712           53633                           DXCH     LAND                                  
035289,000318: 31,2713           00006                           EXTEND                                         
035290,000319: 31,2714           31545                           DCA      LANDTEMP   +2                         
035291,000320: 31,2715           53635                           DXCH     LAND       +2                         
035292,000321: 31,2716           00006                           EXTEND                                         
035293,000322: 31,2717           31547                           DCA      LANDTEMP   +4                         
035294,000323: 31,2720           53637                           DXCH     LAND       +4                         
035295,000324: 
035296,000325: 31,2721           03674                           TC       TDISPSET                              
035297,000326: 31,2722           03721                           TC       FASTCHNG                              #  SINCE REDESIG MAY CHANGE LANDTEMP
035298,000327: 

Page 808

035300,000329: 31,2723           51620        BRSPOT2            INDEX    WCHPHASE                              
035301,000330: 31,2724           12454                           TCF      PREGUIDE                              
035302,000331: 
035303,000332:                                                                                                  #  ****************************************************************************************************************
035304,000333:                                                                                                  #  LANDING SITE PERTURBATION EQUATIONS
035305,000334:                                                                                                  #  ****************************************************************************************************************
035306,000335: 
035307,000336: 31,2725           30102        REDESIG            CA       FLAGWRD6                              #  IS REDFLAG SET?
035308,000337: 31,2726           74746                           MASK     REDFLBIT                              
035309,000338: 31,2727           00006                           EXTEND                                         
035310,000339: 31,2730           13035                           BZF      RGVGCALC                              #  NO:   SKIP REDESIGNATION LOGIC
035311,000340: 
035312,000341: 31,2731           31664                           CA       TREDES                                #  YES:  HAS TREDES REACHED ZERO?
035313,000342: 31,2732           00006                           EXTEND                                         
035314,000343: 31,2733           13035                           BZF      RGVGCALC                              #  YES:  SKIP REDESIGNATION LOGIC
035315,000344: 
035316,000345: 31,2734           00004                           INHINT                                         
035317,000346: 31,2735           31642                           CA       ELINCR1                               
035318,000347: 31,2736           55552                           TS       ELINCR                                
035319,000348: 31,2737           31643                           CA       AZINCR1                               
035320,000349: 31,2740           55554                           TS       AZINCR                                
035321,000350: 31,2741           03721                           TC       FASTCHNG                              
035322,000351: 
035323,000352: 31,2742           34755                           CA       ZERO                                  
035324,000353: 31,2743           55642                           TS       ELINCR1                               
035325,000354: 31,2744           55643                           TS       AZINCR1                               
035326,000355: 31,2745           00003                           RELINT                                         
035327,000356: 31,2746           55553                           TS       ELINCR     +1                         
035328,000357: 31,2747           55555                           TS       AZINCR     +1                         
035329,000358: 
035330,000359: 31,2750           30120                           CA       FIXLOC                                #  SET PD TO 0
035331,000360: 31,2751           54166                           TS       PUSHLOC                               
035332,000361: 
035333,000362: 31,2752           06036                           TC       INTPRET                               
035334,000363: 31,2753           52375                           VLOAD    VSU                                   
035335,000364: 31,2754           03633                                    LAND                                  
035336,000365: 31,2755           03517                                    R                                     #                  -      -
035337,000366: 31,2756           41434                           RTB      PUSH                                  #  PUSH DOWN UNIT (LAND - R)
035338,000367: 31,2757           21700                                    NORMUNIT                              
035339,000368: 31,2760           76435                           VXV      VSL1                                  
035340,000369: 31,2761           02154                                    YNBPIP                                #                     -          -      -
035341,000370: 31,2762           65361                           VXSC     PDDL                                  #  PUSH DOWN - ELINCR(YNB * UNIT(LAND - R))
035342,000371: 31,2763           03553                                    ELINCR                                
035343,000372: 31,2764           03555                                    AZINCR                                
035344,000373: 31,2765           52361                           VXSC     VSU                                   
035345,000374: 31,2766           02154                                    YNBPIP                                
035346,000375: 31,2767           41455                           VAD      PUSH                                  #  RESULTING VECTOR IS 1/2 REAL SIZE
035347,000376: 
035348,000377: 31,2770           45345                           DLOAD    DSU                                   #  MAKE SURE REDESIGNATION IS NOT
035349,000378: 31,2771           00001                                    0                                     #    TOO CLOSE TO THE HORIZON
035350,000379: 

Page 809

035352,000381: 31,2772           23762                                    DEPRCRIT                              
035353,000382: 31,2773           71240                           BMN      DLOAD                                 
035354,000383: 31,2774           62777                                    REDES1                                
035355,000384: 31,2775           23762                                    DEPRCRIT                              
035356,000385: 31,2776           00001                           STORE    0                                     
035357,000386: 31,2777           45345        REDES1             DLOAD    DSU                                   
035358,000387: 31,3000           03633                                    LAND                                  
035359,000388: 31,3001           03517                                    R                                     
035360,000389: 31,3002           74271                           DDV      VXSC                                  
035361,000390: 31,3003           00001                                    0                                     
035362,000391: 31,3004           53455                           VAD      UNIT                                  
035363,000392: 31,3005           03517                                    R                                     
035364,000393: 31,3006           76561                           VXSC     VSL1                                  
035365,000394: 31,3007           02337                                    /LAND/                                
035366,000395: 31,3010           03543                           STORE    LANDTEMP                              
035367,000396: 31,3011           77776                           EXIT                                           #  LOOKANGL WILL BE COMPUTED AT RGVGCALC
035368,000397: 
035369,000398: 31,3012           03721                           TC       FASTCHNG                              
035370,000399: 
035371,000400: 31,3013           00006                           EXTEND                                         
035372,000401: 31,3014           31543                           DCA      LANDTEMP                              
035373,000402: 31,3015           53633                           DXCH     LAND                                  
035374,000403: 31,3016           00006                           EXTEND                                         
035375,000404: 31,3017           31545                           DCA      LANDTEMP   +2                         
035376,000405: 31,3020           53635                           DXCH     LAND       +2                         
035377,000406: 31,3021           00006                           EXTEND                                         
035378,000407: 31,3022           31547                           DCA      LANDTEMP   +4                         
035379,000408: 31,3023           53637                           DXCH     LAND       +4                         
035380,000409: 
035381,000410: 31,3024           13035                           TCF      RGVGCALC                              
035382,000411: 
035383,000412:                                                                                                  #  ****************************************************************************************************************
035384,000413:                                                                                                  #  COMPUTE STATE IN GUIDANCE COORDINATES
035385,000414:                                                                                                  #  ****************************************************************************************************************
035386,000415: 
035387,000416:                                                                                                  #             RGVGCALC COMPUTATIONS ARE AS FOLLOWS:-
035388,000417: 
035389,000418:                                                                                                  #                      VELOCITY RELATIVE TO THE SURFACE:
035390,000419: 
035391,000420:                                                                                                  #                                  -         -   -   -
035392,000421:                                                                                                  #                                  ANGTERM = V + R * WM
035393,000422: 
035394,000423:                                                                                                  #                      STATE IN GUIDANCE COORDINATES:
035395,000424: 
035396,000425:                                                                                                  #                                  -     *   -   -
035397,000426:                                                                                                  #                                  RGU = CG (R - LAND)
035398,000427: 
035399,000428:                                                                                                  #                                  -     *   -   -    -
035400,000429:                                                                                                  #                                  VGU = CG (V - WM * R)
035401,000430: 

Page 810

035403,000432:                                                                                                  #                      HORIZONTAL VELOCITY FOR DISPLAY:
035404,000433: 
035405,000434:                                                                                                  #                                  VHORIZ = 8 ABVAL (0, VG , VG )
035406,000435:                                                                                                  #                                                         2    1
035407,000436: 
035408,000437:                                                                                                  #                      DEPRESSION ANGLE FOR DISPLAY:
035409,000438: 
035410,000439:                                                                                                  #                                                         -   -     -
035411,000440:                                                                                                  #                                  LOOKANGL = ARCSIN(UNIT(R - LAND).XMBPIP)
035412,000441: 
035413,000442: 31,3025           06036        CALCRGVG           TC       INTPRET                               #  IN IGNALG, COMPUTE V FROM INTEGRATION
035414,000443: 31,3026           64375                           VLOAD    MXV                                   #    OUTPUT AND TRIM CORRECTION TERM
035415,000444: 31,3027           00025                                    VATT1                                 #    COMPUTED LAST PASS AND LEFT IN UNFC/2
035416,000445: 31,3030           01734                                    REFSMMAT                              
035417,000446: 31,3031           53362                           VSR1     VAD                                   
035418,000447: 31,3032           03252                                    UNFC/2                                
035419,000448: 31,3033           03525                           STORE    V                                     
035420,000449: 31,3034           77776                           EXIT                                           
035421,000450: 
035422,000451: 31,3035           06036        RGVGCALC           TC       INTPRET                               #  ENTER HERE TO RECOMPUTE RG AND VG
035423,000452: 31,3036           47375                           VLOAD    VXV                                   
035424,000453: 31,3037           03517                                    R                                     
035425,000454: 31,3040           02331                                    WM                                    
035426,000455: 31,3041           70455                           VAD      VSR2                                  #  RESCALE TO UNITS OF 2(9) M/CS
035427,000456: 31,3042           03525                                    V                                     
035428,000457: 31,3043           02305                           STORE    ANGTERM                               
035429,000458: 31,3044           77721                           MXV                                            
035430,000459: 31,3045           02510                                    CG                                    #  NO SHIFT SINCE ANGTERM IS DOUBLE SIZED
035431,000460: 31,3046           03625                           STORE    VGU                                   
035432,000461: 31,3047           55525                           PDDL     VDEF                                  #  FORM (0,VG ,VG ) IN UNITS OF 2(10) M/CS
035433,000462: 31,3050           06424                                    ZEROVECS                              #            2   1
035434,000463: 31,3051           52446                           ABVAL    SL3                                   
035435,000464: 31,3052           26267                           STOVL    VHORIZ                                #  VHORIZ FOR DISPLAY DURING P65, P66, P67
035436,000465: 31,3053           03517                                    R                                     #            -   -
035437,000466: 31,3054           41451                           VSU      PUSH                                  #  PUSH DOWN R - LAND
035438,000467: 31,3055           03633                                    LAND                                  
035439,000468: 31,3056           76521                           MXV      VSL1                                  
035440,000469: 31,3057           02510                                    CG                                    
035441,000470: 31,3060           26544                           STOVL    RGU                                   
035442,000471: 31,3061           50234                           RTB      DOT                                   #  NOW IN MPAC IS SINE(LOOKANGL)/4
035443,000472: 31,3062           21700                                    NORMUNIT                              
035444,000473: 31,3063           02146                                    XNBPIP                                
035445,000474: 31,3064           77776                           EXIT                                           
035446,000475: 
035447,000476: 31,3065           30120                           CA       FIXLOC                                #  RESET PUSH DOWN POINTER
035448,000477: 31,3066           54166                           TS       PUSHLOC                               
035449,000478: 
035450,000479: 31,3067           30154                           CA       MPAC                                  #  COMPUTE LOOKANGL ITSELF
035451,000480: 31,3070           60000                           DOUBLE                                         
035452,000481: 31,3071           04616                           TC       BANKCALL                              
035453,000482: 

Page 811

035455,000484: 31,3072           61643                           CADR     SPARCSIN   -1                         
035456,000485: 31,3073           63742                           AD       1/2DEG                                
035457,000486: 31,3074           00006                           EXTEND                                         
035458,000487: 31,3075           73741                           MP       180DEGS                               
035459,000488: 31,3076           55665                           TS       LOOKANGL                              #  LOOKANGL FOR DISPLAY DURING P64
035460,000489: 
035461,000490: 31,3077           51620        BRSPOT3            INDEX    WCHPHASE                              
035462,000491: 31,3100           12462                           TCF      WHATGUID                              
035463,000492: 
035464,000493:                                                                                                  # ****************************************************************************************************************
035465,000494:                                                                                                  #  LINEAR GUIDANCE EQUATION
035466,000495:                                                                                                  # ****************************************************************************************************************
035467,000496: 
035468,000497: 31,3101           03667        LINGUID            TC       INTPRETX                              
035469,000498: 31,3102           74375                           VLOAD    VXSC                                  #  -     -     -
035470,000499: 31,3103           02277                                    JLING                                 #  ACG = ADG + JLING TTF
035471,000500: 31,3104           03641                                    TTF/8                                 
035472,000501: 31,3105           52132                           VSL3     GOTO                                  #  PICK UP THE VAD* AT AFCCALC
035473,000502: 31,3106           63171                                    AFCCALC                               
035474,000503: 
035475,000504:                                                                                                  # ****************************************************************************************************************
035476,000505:                                                                                                  #  TTF/4 COMPUTATION
035477,000506:                                                                                                  # ****************************************************************************************************************
035478,000507: 
035479,000508: 31,3107           03667        TTF/8CL            TC       INTPRETX                              
035480,000509: 31,3110           77743                           DLOAD*                                         
035481,000510: 31,3111           02431                                    JDG2TTF,1                             
035482,000511: 31,3112           23567                           STODL*   TABLTTF    +6                         #  A(3) = 8 JDG  TO TABLTTF
035483,000512: 31,3113           02427                                    ADG2TTF,1                             #              2
035484,000513: 31,3114           17565                           STODL    TABLTTF    +4                         #  A(2) = 6 ADG  TO TABLTTF
035485,000514: 31,3115           03631                                    VGU        +4                         #              2
035486,000515: 31,3116           42605                           DMP      DAD*                                  
035487,000516: 31,3117           23755                                    3/4DP                                 
035488,000517: 31,3120           02425                                    VDG2TTF,1                             
035489,000518: 31,3121           23563                           STODL*   TABLTTF    +2                         #  A(1) = (6 VGU  + 18 VDG )/8 TO TABLTTF
035490,000519: 31,3122           02407                                    RDG        +4,1                       #               2         2
035491,000520: 31,3123           41225                           DSU      DMP                                   
035492,000521: 31,3124           02550                                    RGU        +4                         
035493,000522: 31,3125           23753                                    3/8DP                                 
035494,000523: 31,3126           03561                           STORE    TABLTTF                               #  A(0) = -24 (RGU  - RDG )/64 TO TABLTTF
035495,000524: 31,3127           77776                           EXIT                                           #                 2      2
035496,000525: 
035497,000526: 31,3130           34744                           CA       BIT8                                  
035498,000527: 31,3131           55570                           TS       TABLTTF    +10                        #  FRACTIONAL PRECISION FOR TTF TO TABLE
035499,000528: 
035500,000529: 31,3132           00006                           EXTEND                                         
035501,000530: 31,3133           31641                           DCA      TTF/8                                 
035502,000531: 31,3134           52155                           DXCH     MPAC                                  #  LOADS TTF/8 (INITIAL GUESS) INTO MPAC
035503,000532: 31,3135           34752                           CAF      TWO                                   #  DEGREE - ONE
035504,000533: 31,3136           54001                           TS       L                                     
035505,000534: 

Page 812

035507,000536: 31,3137           33733                           CAF      TABLTTFL                              
035508,000537: 31,3140           03543                           TC       ROOTPSRS                              #  YIELDS TTF/8 IN MPAC
035509,000538: 31,3141           05652                           TC       POODOO                                #  BAD RETURN
035510,000539: 31,3142           01406                           OCT      01406                                 
035511,000540: 31,3143           00006                           EXTEND                                         #  GOOD RETURN
035512,000541: 31,3144           30155                           DCA      MPAC                                  #  FETCH TTF/8 KEEPING IT IN MPAC
035513,000542: 31,3145           53641                           DXCH     TTF/8                                 #  CORRECTED TTF/8
035514,000543: 
035515,000544: 31,3146           03674                           TC       TDISPSET                              
035516,000545: 
035517,000546:                                                                                                  #                                               (CONTINUE TO QUADGUID)
035518,000547: 
035519,000548:                                                                                                  #  ****************************************************************************************************************
035520,000549:                                                                                                  #  MAIN GUIDANCE EQUATION
035521,000550:                                                                                                  #  ****************************************************************************************************************
035522,000551: 
035523,000552:                                                                                                  #                       AS PUBLISHED:-
035524,000553: 
035525,000554:                                                                                                  #                                                -     -        -     -
035526,000555:                                                                                                  #                                  -     -     6(VDG + VG)   12(RDG - RG)
035527,000556:                                                                                                  #                                  ACG = ADG + ----------- + ------------
035528,000557:                                                                                                  #                                                  TTF         (TTF)(TTF)
035529,000558: 
035530,000559:                                                                                                  #                       AS HERE PROGRAMMED:-
035531,000560: 
035532,000561:                                                                                                  #                                              -     -
035533,000562:                                                                                                  #                                       3 (1/4(RDG - RG)   -     - )
035534,000563:                                                                                                  #                                       - (------------- + VDG + VG)
035535,000564:                                                                                                  #                                 -     4 (    TTF/8               )   -
035536,000565:                                                                                                  #                                 ACG = ---------------------------- + ADG
035537,000566:                                                                                                  #                                                  TTF/8
035538,000567: 
035539,000568: 31,3147           33732        QUADGUID           CAF      30SEC*17                              #  PULSE-OUTS ARE INHIBITED WHENEVER
035540,000569: 31,3150           61640                           AD       TTF/8                                 #    TTF < 30 SECONDS, REGARDLESS OF
035541,000570: 31,3151           00006                           EXTEND                                         #    THE DURATION OF LINEAR GUIDANCE
035542,000571: 31,3152           63155                           BZMF     Q**DG**D                              
035543,000572: 31,3153           05504                           TC       UPFLAG                                
035544,000573: 31,3154           00142                           ADRES    POUTFLAG                              
035545,000574: 31,3155           03667        Q**DG**D           TC       INTPRETX                              
035546,000575: 31,3156           52373                           VLOAD*   VSU                                   
035547,000576: 31,3157           02403                                    RDG,1                                 
035548,000577: 31,3160           02544                                    RGU                                   
035549,000578: 31,3161           70541                           V/SC     VSR2                                  
035550,000579: 31,3162           03641                                    TTF/8                                 
035551,000580: 31,3163           53253                           VAD*     VAD                                   
035552,000581: 31,3164           02411                                    VDG,1                                 
035553,000582: 31,3165           03625                                    VGU                                   
035554,000583: 31,3166           74341                           V/SC     VXSC                                  
035555,000584: 31,3167           03641                                    TTF/8                                 
035556,000585: 

Page 813

035558,000587: 31,3170           23755                                    3/4DP                                 
035559,000588: 31,3171           77653        AFCCALC            VAD*                                           
035560,000589: 31,3172           02417                                    ADG,1                                 #  CURRENT TARGET ACCELERATION
035561,000590: 31,3173           02271                           STORE    ACG                                   
035562,000591: 31,3174           76505        AFCCALC1           VXM      VSL1                                  #  VERTGUID COMES HERE
035563,000592: 31,3175           02510                                    CG                                    
035564,000593: 31,3176           70315                           PDVL     V/SC                                  
035565,000594: 31,3177           01237                                    GDT/2                                 
035566,000595: 31,3200           23751                                    GSCALE                                
035567,000596: 31,3201           45445                           BVSU     STADR                                 
035568,000597: 31,3202           74525                           STORE    UNFC/2                                #  UNFC/2 NEED NOT BE UNITIZED
035569,000598: 31,3203           77646                           ABVAL                                          
035570,000599: 31,3204           03574        AFCCALC2           STORE    /AFC/                                 #  MAGNITUDE OF AFC FOR THROTTLE
035571,000600: 31,3205           71214                           BON      DLOAD                                 
035572,000601: 31,3206           03306                                    2PHASFLG                              
035573,000602: 31,3207           63231                                    AFCCLEND                              
035574,000603: 31,3210           03252                                    UNFC/2                                #  VERTICAL COMPONENT
035575,000604: 31,3211           65316                           DSQ      PDDL                                  
035576,000605: 31,3212           03254                                    UNFC/2     +2                         #  OUT-OF-PLANE
035577,000606: 31,3213           65316                           DSQ      PDDL                                  
035578,000607: 31,3214           23735                                    HIGHESTF                              
035579,000608: 31,3215           63471                           DDV      DSQ                                   
035580,000609: 31,3216           01245                                    MASS                                  #                         2    2    2
035581,000610: 31,3217           45225                           DSU      DSU                                   #  AMAXHORIZ = SQRT(ATOTAL - A  - A  )
035582,000611: 31,3220           71244                           BPL      DLOAD                                 #                             1    0
035583,000612: 31,3221           63223                                    AFCCALC3                              
035584,000613: 31,3222           06424                                    ZEROVECS                              
035585,000614: 31,3223           43366        AFCCALC3           SQRT     DAD                                   
035586,000615: 31,3224           03256                                    UNFC/2     +4                         
035587,000616: 31,3225           44244                           BPL      BDSU                                  
035588,000617: 31,3226           63231                                    AFCCLEND                              
035589,000618: 31,3227           03256                                    UNFC/2     +4                         
035590,000619: 31,3230           03256                           STORE    UNFC/2     +4                         
035591,000620: 31,3231           77776        AFCCLEND           EXIT                                           
035592,000621: 31,3232           03721                           TC       FASTCHNG                              
035593,000622: 
035594,000623: 31,3233           31620                           CA       WCHPHASE                              #  PREPARE FOR PHASE SWITCHING LOGIC
035595,000624: 31,3234           55617                           TS       WCHPHOLD                              
035596,000625: 31,3235           25621                           INCR     FLPASS0                               #  INCREMENT PASS COUNTER
035597,000626: 
035598,000627: 31,3236           51620        BRSPOT4            INDEX    WCHPHASE                              
035599,000628: 31,3237           12470                           TCF      AFTRGUID                              
035600,000629: 
035601,000630:                                                                                                  #  ***************************************************************************************************************
035602,000631:                                                                                                  #  ERECT GUIDANCE-STABLE MEMBER TRANSFORMATION MATRIX
035603,000632:                                                                                                  #  ***************************************************************************************************************
035604,000633: 
035605,000634: 31,3240           06036        CGCALC             TC       INTPRET                               
035606,000635: 31,3241           53575                           VLOAD    UNIT                                  
035607,000636: 31,3242           03633                                    LAND                                  
035608,000637: 

Page 814

035610,000639: 31,3243           26510                           STOVL    CG                                    #  FIRST ROW
035611,000640: 31,3244           02305                                    ANGTERM                               
035612,000641: 31,3245           53361                           VXSC     VAD                                   #  REMEMBER THAT ANGTERM IS DOUBLE-SIZED
035613,000642: 31,3246           03641                                    TTF/8                                 
035614,000643: 31,3247           03633                                    LAND                                  
035615,000644: 31,3250           47051                           VSU      RTB                                   
035616,000645: 31,3251           03517                                    R                                     
035617,000646: 31,3252           21700                                    NORMUNIT                              
035618,000647: 31,3253           47035                           VXV      RTB                                   
035619,000648: 31,3254           03633                                    LAND                                  
035620,000649: 31,3255           21700                                    NORMUNIT                              
035621,000650: 31,3256           26516                           STOVL    CG         +6                         #  SECOND ROW
035622,000651: 31,3257           02510                                    CG                                    
035623,000652: 31,3260           76435                           VXV      VSL1                                  
035624,000653: 31,3261           02516                                    CG         +6                         
035625,000654: 31,3262           02524                           STORE    CG         +14                        
035626,000655: 31,3263           77776                           EXIT                                           
035627,000656: 
035628,000657:                                                                                                  #                                              (CONTINUE TO EXTLOGIC)
035629,000658: 
035630,000659:                                                                                                  #  ****************************************************************************************************************
035631,000660:                                                                                                  #  PREPARE TO EXIT
035632,000661:                                                                                                  #  ****************************************************************************************************************
035633,000662: 
035634,000663:                                                                                                  #  DECIDE (1) HOW TO EXIT, AND (2) WHETHER TO SWITCH PHASES
035635,000664: 
035636,000665: 31,3264           11620        EXTLOGIC           CCS      WCHPHASE                              
035637,000666: 31,3265           50000                           INDEX    A                                     #  WCHPHASE = +2    APPRQUAD    A = 1
035638,000667: 31,3266           31425                           CA       TENDBRAK                              #  WCHPHASE = +0    BRAKQUAD    A = 0
035639,000668: 31,3267           13271                           TCF      EXSPOT1    -1                         #  WCHPHASE = -1    IGNALG      A = 0
035640,000669: 
035641,000670: 31,3270           33727        LINXLOGC           CA       3SEC*17                               
035642,000671: 31,3271           61640                           AD       TTF/8                                 
035643,000672: 
035644,000673: 31,3272           00006        EXSPOT1            EXTEND                                         
035645,000674: 31,3273           51620                           INDEX    WCHPHASE                              
035646,000675: 31,3274           62476                           BZMF     WHATEXIT                              
035647,000676: 
035648,000677: 31,3275           03721                           TC       FASTCHNG                              
035649,000678: 
035650,000679: 31,3276           31617                           CA       WCHPHOLD                              
035651,000680: 31,3277           64753                           AD       ONE                                   
035652,000681: 31,3300           22007                           ZL                                             #  +0
035653,000682: 31,3301           53621                           DXCH     WCHPHASE                              #  ADVANCING WCHPHASE AND RESETTING FLPASS0
035654,000683: 
035655,000684: 31,3302           51617                           INDEX    WCHPHOLD                              
035656,000685: 31,3303           12476                           TCF      WHATEXIT                              
035657,000686: 
035658,000687:                                                                                                  #  ****************************************************************************************************************
035659,000688:                                                                                                  #  ROUTINES FOR EXITING FROM LANDING GUIDANCE
035660,000689: 

Page 815

035662,000691:                                                                                                  #  ****************************************************************************************************************
035663,000692: 
035664,000693:                                                                                                  #  1.        EXGSUB IS THE RETURN WHEN GUIDSUB IS CALLED BY THE IGNITION ALGORITHM.
035665,000694: 
035666,000695:                                                                                                  #  2.        EXBRAK IN THE EXIT USED DURING THE BRAKING PHASE.   IN THIS CASE UNIT(R) IS THE WINDOW POINTING VECTOR.
035667,000696: 
035668,000697:                                                                                                  #  3.        EXNORM IS THE EXIT USED AT OTHER TIMES DURING THE BURN.
035669,000698: 
035670,000699:                                                                                                  #           (EXOVFLOW IS A SUBROUTINE OF EXBRAK AND EXNORM CALLED WHEN OVERFLOW OCCURRED ANYWHERE IN GUIDANCE.)
035671,000700: 
035672,000701: 31,3304           06036        EXGSUB             TC       INTPRET                               #  COMPUTE TRIM VELOCITY CORRECTION TERM
035673,000702: 31,3305           47175                           VLOAD    RTB                                   
035674,000703: 31,3306           03252                                    UNFC/2                                
035675,000704: 31,3307           21700                                    NORMUNIT                              
035676,000705: 31,3310           74361                           VXSC     VXSC                                  
035677,000706: 31,3311           03425                                    ZOOMTIME                              
035678,000707: 31,3312           22001                                    TRIMACCL                              
035679,000708: 31,3313           03252                           STORE    UNFC/2                                
035680,000709: 31,3314           77776                           EXIT                                           
035681,000710: 
035682,000711: 31,3315           11645                           CCS      NGUIDSUB                              
035683,000712: 31,3316           12520                           TCF      GUIDSUB                               
035684,000713: 31,3317           11644                           CCS      NIGNLOOP                              
035685,000714: 31,3320           13323                           TCF      +3                                    
035686,000715: 31,3321           05567                           TC       ALARM                                 
035687,000716: 31,3322           01412                           OCT      01412                                 
035688,000717: 
035689,000718: 31,3323           04635                 +3        TC       POSTJUMP                              
035690,000719: 31,3324           65075                           CADR     DDUMCALC                              
035691,000720: 
035692,000721: 31,3325           06036        EXBRAK             TC       INTPRET                               
035693,000722: 31,3326           77775                           VLOAD                                          
035694,000723: 31,3327           03535                                    UNIT/R/                               
035695,000724: 31,3330           03260                           STORE    UNWC/2                                
035696,000725: 31,3331           77776                           EXIT                                           
035697,000726: 31,3332           13405                           TCF      STEER?                                
035698,000727: 
035699,000728: 31,3333           06036        EXNORM             TC       INTPRET                               
035700,000729: 31,3334           52375                           VLOAD    VSU                                   
035701,000730: 31,3335           03633                                    LAND                                  
035702,000731: 31,3336           03517                                    R                                     
035703,000732: 31,3337           77634                           RTB                                            
035704,000733: 31,3340           21700                                    NORMUNIT                              
035705,000734: 31,3341           03260                           STORE    UNWC/2                                #  UNIT(LAND - R) IS TENTATIVE CHOICE
035706,000735: 31,3342           50235                           VXV      DOT                                   
035707,000736: 31,3343           02146                                    XNBPIP                                
035708,000737: 31,3344           02516                                    CG         +6                         
035709,000738: 31,3345           77776                           EXIT                                           #  WITH PROJ IN MPAC 1/8 REAL SIZE
035710,000739: 
035711,000740: 31,3346           40154                           CS       MPAC                                  #  GET COEFFICIENT FOR CG +14
035712,000741: 

Page 816

035714,000743: 31,3347           63763                           AD       PROJMAX                               
035715,000744: 31,3350           64733                           AD       POSMAX                                
035716,000745: 31,3351           54130                           TS       BUF                                   
035717,000746: 31,3352           40130                           CS       BUF                                   
035718,000747: 31,3353           26130                           ADS      BUF                                   #  RESULT IS 0 IF PROJMAX - PROJ NEGATIVE
035719,000748: 
035720,000749: 31,3354           43764                           CS       PROJMIN                               #  GET COEFFICIENT FOR UNIT(LAND - R)
035721,000750: 31,3355           60154                           AD       MPAC                                  
035722,000751: 31,3356           64733                           AD       POSMAX                                
035723,000752: 31,3357           54131                           TS       BUF        +1                         
035724,000753: 31,3360           40131                           CS       BUF        +1                         
035725,000754: 31,3361           26131                           ADS      BUF        +1                         #  RESULT IS 0 IF PROJ - PROJMIN NEGATIVE
035726,000755: 
035727,000756: 31,3362           34751                           CAF      FOUR                                  
035728,000757: 31,3363           76241        UNWCLOOP           MASK     SIX                                   
035729,000758: 31,3364           54002                           TS       Q                                     
035730,000759: 31,3365           35014                           CA       EBANK5                                
035731,000760: 31,3366           54003                           TS       EBANK                                 
035732,000761: 31,3367  E5,1507                                  EBANK=   CG                                    
035733,000762: 31,3367           30130                           CA       BUF                                   
035734,000763: 31,3370           00006                           EXTEND                                         
035735,000764: 31,3371           50002                           INDEX    Q                                     
035736,000765: 31,3372           71523                           MP       CG         +14                        
035737,000766: 31,3373           24006                           INCR     BBANK                                 
035738,000767: 31,3374  E6,1657                                  EBANK=   UNWC/2                                
035739,000768: 31,3374           50002                           INDEX    Q                                     
035740,000769: 31,3375           53660                           DXCH     UNWC/2                                
035741,000770: 31,3376           00006                           EXTEND                                         
035742,000771: 31,3377           70131                           MP       BUF        +1                         
035743,000772: 31,3400           50002                           INDEX    Q                                     
035744,000773: 31,3401           21660                           DAS      UNWC/2                                
035745,000774: 31,3402           10002                           CCS      Q                                     
035746,000775: 31,3403           13363                           TCF      UNWCLOOP                              
035747,000776: 
035748,000777: 31,3404           24006                           INCR     BBANK                                 
035749,000778: 31,3405  E7,1610                                  EBANK=   PIF                                   
035750,000779: 
035751,000780: 31,3405           30076        STEER?             CA       FLAGWRD2                              #  IF STEERSW DOWN NO OUTPUTS
035752,000781: 31,3406           74741                           MASK     STEERBIT                              
035753,000782: 31,3407           00006                           EXTEND                                         
035754,000783: 31,3410           13416                           BZF      RATESTOP                              
035755,000784: 
035756,000785: 31,3411           30121        EXVERT             CA       OVFIND                                #  IF OVERFLOW ANYWHERE IN GUIDANCE
035757,000786: 31,3412           00006                           EXTEND                                         #    DON'T CALL THROTTLE OR FINDCDUW
035758,000787: 31,3413           13421                           BZF      +6                                    
035759,000788: 
035760,000789: 31,3414           05567        EXOVFLOW           TC       ALARM                                 #  SOUND THE ALARM NON-ABORTIVELY.
035761,000790: 31,3415           01410                           OCT      01410                                 
035762,000791: 
035763,000792: 31,3416           04616        RATESTOP           TC       BANKCALL                              #  CLEAN UP AFTER LAST FINDCDUW
035764,000793: 

Page 817

035766,000795: 31,3417           40165                           CADR     STOPRATE                              
035767,000796: 
035768,000797: 31,3420           13426                           TCF      DISPEXIT                              
035769,000798: 
035770,000799: 31,3421           02247        GDUMP1             TC       THROTTLE                              
035771,000800: 31,3422           06036                           TC       INTPRET                               
035772,000801: 31,3423           77624                           CALL                                           
035773,000802: 31,3424           61062                                    FINDCDUW   -2                         
035774,000803: 31,3425           77776                           EXIT                                           
035775,000804: 
035776,000805:                                                                                                  #                                                    (CONTINUE TO DISPEXIT)
035777,000806: 
035778,000807: 
035779,000808:                                                                                                  #  ****************************************************************************************************************
035780,000809:                                                                                                  #  GUIDANCE LOOP DISPLAYS
035781,000810:                                                                                                  #  ****************************************************************************************************************
035782,000811: 
035783,000812: 31,3426           00006        DISPEXIT           EXTEND                                         #  KILL GROUP 3:  DISPLAYS WILL BE
035784,000813: 31,3427           34755                           DCA      NEG0                                  #    RESTORED BY NEXT GUIDANCE CYCLE
035785,000814: 31,3430           52757                           DXCH     -PHASE3                               
035786,000815: 
035787,000816: 31,3431           40104                           CS       FLAGWRD8                              #  IF FLUNDISP SET, NO DISPLAY THIS PASS
035788,000817: 31,3432           74742                           MASK     FLUNDBIT                              
035789,000818: 31,3433           00006                           EXTEND                                         
035790,000819: 31,3434           13444                           BZF      ENDLLJOB                              #  TO PICK UP THE TAG
035791,000820: 
035792,000821: 31,3435           51617                           INDEX    WCHPHOLD                              
035793,000822: 31,3436           12502                           TCF      WHATDISP                              
035794,000823: 
035795,000824: 31,3437           05353                 -2        TC       PHASCHNG                              #  KILL GROUP 5
035796,000825: 31,3440           00035                           OCT      00035                                 
035797,000826: 
035798,000827: 31,3441           33765        P63DISPS           CAF      V06N63                                
035799,000828: 31,3442           04616        DISPCOMN           TC       BANKCALL                              
035800,000829: 31,3443           20346                           CADR     REGODSPR                              
035801,000830: 
035802,000831: 31,3444           15155        ENDLLJOB           TCF      ENDOFJOB                              
035803,000832: 
035804,000833: 31,3445           31664        P64DISPS           CA       TREDES                                #  HAS TREDES REACHED ZERO?
035805,000834: 31,3446           00006                           EXTEND                                         
035806,000835: 31,3447           13471                           BZF      RED-OVER                              #  YES:  CLEAR REDESIGNATION FLAG
035807,000836: 
035808,000837: 31,3450           40102                           CS       FLAGWRD6                              #  NO:   IS REDFLAG SET?
035809,000838: 31,3451           74746                           MASK     REDFLBIT                              
035810,000839: 31,3452           00006                           EXTEND                                         
035811,000840: 31,3453           13473                           BZF      REDES-OK                              #  YES:  DO STATIC DISPLAY
035812,000841: 
035813,000842: 31,3454           33766                           CAF      V06N64                                #  OTHERWISE USE FLASHING DISPLAY
035814,000843: 31,3455           04616                           TC       BANKCALL                              
035815,000844: 

Page 818

035817,000846: 31,3456           20340                           CADR     REFLASHR                              
035818,000847: 31,3457           16001                           TCF      GOTOPOOH                              #  TERMINATE
035819,000848: 31,3460           13463                           TCF      P64CEED                               #  PROCEED    PERMIT REDESIGNATIONS
035820,000849: 31,3461           13445                           TCF      P64DISPS                              #  RECYCLE
035821,000850: 
035822,000851: 31,3462           13444                           TCF      ENDLLJOB                              #  TO PICK UP THE TAG
035823,000852: 
035824,000853: 31,3463           34755        P64CEED            CAF      ZERO                                  
035825,000854: 31,3464           55642                           TS       ELINCR1                               
035826,000855: 31,3465           55643                           TS       AZINCR1                               
035827,000856: 
035828,000857: 31,3466           05504                           TC       UPFLAG                                #  ENABLE REDESIGNATION LOGIC
035829,000858: 31,3467           00143                           ADRES    REDFLAG                               
035830,000859: 
035831,000860: 31,3470           15155                           TCF      ENDOFJOB                              
035832,000861: 
035833,000862: 31,3471           05516        RED-OVER           TC       DOWNFLAG                              
035834,000863: 31,3472           00143                           ADRES    REDFLAG                               
035835,000864: 31,3473           33766        REDES-OK           CAF      V06N64                                
035836,000865: 31,3474           13442                           TCF      DISPCOMN                              
035837,000866: 
035838,000867: 
035839,000868: 31,3475           33767        VERTDISP           CAF      V06N60                                
035840,000869: 31,3476           13442                           TCF      DISPCOMN                              
035841,000870: 
035842,000871: 
035843,000872:                                                                                                  #  ****************************************************************************************************************
035844,000873:                                                                                                  #  GUIDANCE FOR VERTICAL DESCENT
035845,000874:                                                                                                  #  ****************************************************************************************************************
035846,000875: 
035847,000876: 31,3477           11645        VERTGUID           CCS      WCHVERT                               
035848,000877: 31,3500           13426                           TCF      DISPEXIT                              #  POSITIVE   P67, WHICH SKIPS ALL GUIDANCE
035849,000878: 31,3501           13516                           TCF      P66VERT                               #  +0
035850,000879: 
035851,000880:                                                                                                  #           THE P65 GUIDANCE EQUATION IS AS FOLLOWS:-
035852,000881: 
035853,000882:                                                                                                  #                            -         -
035854,000883:                                                                                                  #                      -     VDGVERT - VGU          -
035855,000884:                                                                                                  #                      ACG = -------------  , WHERE VDGVERT = (-3FPS,0,0)
035856,000885:                                                                                                  #                               TAUVERT
035857,000886: 
035858,000887: 31,3502           00006        P65VERT            EXTEND                                         #  NEGATIVE
035859,000888: 31,3503           43760                           DCS      +3FPS                                 
035860,000889: 31,3504           53643                           DXCH     VDGVERT                               
035861,000890: 31,3505           06036                           TC       INTPRET                               
035862,000891: 31,3506           65375                           VLOAD    PDDL                                  
035863,000892: 31,3507           06424                                    ZEROVECS                              
035864,000893: 31,3510           03643                                    VDGVERT                               
035865,000894: 31,3511           52266                           VDEF     VSU                                   #  FORM (VDGVERT,0,0), LEAVING DP 0 IN PDL
035866,000895: 31,3512           03625                                    VGU                                   
035867,000896: 

Page 819

035869,000898: 31,3513           52141                           V/SC     GOTO                                  
035870,000899: 31,3514           23745                                    TAUVERT                               
035871,000900: 31,3515           63174                                    AFCCALC1                              
035872,000901: 
035873,000902: 
035874,000903:                                                                                                  #           THE R.O.D. EQUATION IS AS FOLLOWS:-
035875,000904: 
035876,000905:                                                                                                  #                             (VDGVERTX - VGUX)/TAUVERT - GMOON
035877,000906:                                                                                                  #                     /AFC/ = ---------------------------------
035878,000907:                                                                                                  #                                       UNIT/R/ . XNB
035879,000908: 
035880,000909: 31,3516           57644        P66VERT            XCH      RODCOUNT                              #  RESTART COULD CAUSE RODCOUNTS TO BE LOST
035881,000910: 31,3517           00006                           EXTEND                                         
035882,000911: 31,3520           73756                           MP       +1FPS                                 
035883,000912: 31,3521           21643                           DAS      VDGVERT                               
035884,000913: 31,3522           03721                           TC       FASTCHNG                              
035885,000914: 31,3523           06036                           TC       INTPRET                               
035886,000915: 31,3524           45345                           DLOAD    DSU                                   
035887,000916: 31,3525           03643                                    VDGVERT                               
035888,000917: 31,3526           03625                                    VGU                                   
035889,000918: 31,3527           45271                           DDV      DSU                                   
035890,000919: 31,3530           23747                                    TAUROD                                
035891,000920: 31,3531           22010                                    MOONG                                 
035892,000921: 31,3532           50315                           PDVL     DOT                                   #  HAVE ACC IN UNITS OF 2(-2) M/CS/CS
035893,000922: 31,3533           02146                                    XNBPIP                                
035894,000923: 31,3534           03535                                    UNIT/R/                               
035895,000924: 31,3535           45465                           BDDV     STADR                                 
035896,000925: 31,3536           74203                           STORE    /AFC/                                 
035897,000926: 31,3537           77404                           BOVB     EXIT                                  
035898,000927: 31,3540           63414                                    EXOVFLOW                              
035899,000928: 31,3541           02247                           TC       THROTTLE                              
035900,000929: 31,3542           13426                           TCF      DISPEXIT                              
035901,000930: 
035902,000931: 
035903,000932:                                                                                                  #  ****************************************************************************************************************
035904,000933:                                                                                                  #  REDESIGNATOR TRAP
035905,000934:                                                                                                  #  ****************************************************************************************************************
035906,000935: 
035907,000936: 21,2006                                           BANK     21                                    
035908,000937: 21,2000                                           SETLOC   F2DPS*21                              
035909,000938: 21,2000                                           BANK                                           
035910,000939: 
035911,000940: 21,2006                                           COUNT*   $$/F2DPS                              
035912,000941: 
035913,000942: 21,2006           56016        PITFALL            XCH      BANKRUPT                              
035914,000943: 21,2007           00006                           EXTEND                                         
035915,000944: 21,2010           22012                           QXCH     QRUPT                                 
035916,000945: 
035917,000946: 21,2011           05321                           TC       CHECKMM                               #  IF NOT IN P64, NO REASON TO CONTINUE
035918,000947: 21,2012           00100                           DEC      64         B-14                       
035919,000948: 

Page 820

035921,000950: 21,2013           15270                           TCF      RESUME                                
035922,000951: 
035923,000952: 21,2014           00006                           EXTEND                                         
035924,000953: 21,2015           00031                           READ     CHAN31                                
035925,000954: 21,2016           40000                           COM                                            
035926,000955: 21,2017           72077                           MASK     ALL4BITS                              
035927,000956: 21,2020           55645                           TS       ELVIRA                                
035928,000957: 21,2021           34752                           CAF      TWO                                   
035929,000958: 21,2022           55644                           TS       ZERLINA                               
035930,000959: 21,2023           34756                           CAF      FIVE                                  
035931,000960: 21,2024           05173                           TC       TWIDDLE                               
035932,000961: 21,2025           02032                           ADRES    REDESMON                              
035933,000962: 21,2026           15270                           TCF      RESUME                                
035934,000963: 
035935,000964: 
035936,000965:                                                                                                  #  REDESIGNATION MONITOR (INITIATED BY PITFALL)
035937,000966: 
035938,000967: 
035939,000968: 21,2027           55644        PREMON1            TS       ZERLINA                               
035940,000969: 21,2030           34757        PREMON2            CAF      SEVEN                                 
035941,000970: 21,2031           05224                           TC       VARDELAY                              
035942,000971: 21,2032           00006        REDESMON           EXTEND                                         
035943,000972: 21,2033           00031                           READ     31                                    
035944,000973: 21,2034           40000                           COM                                            
035945,000974: 21,2035           72077                           MASK     ALL4BITS                              
035946,000975: 21,2036           57645                           XCH      ELVIRA                                
035947,000976: 21,2037           54001                           TS       L                                     
035948,000977: 21,2040           11645                           CCS      ELVIRA                                #  DO ANY BITS APPEAR THIS PASS?
035949,000978: 21,2041           12030                           TCF      PREMON2                               #    Y: CONTINUE MONITOR
035950,000979: 
035951,000980: 21,2042           10001                           CCS      L                                     #    N: ANY LAST PASS?
035952,000981: 21,2043           12052                           TCF      COUNT'EM                              #       Y: COUNT 'EM, RESET RUPT, TERMINATE
035953,000982: 21,2044           11644                           CCS      ZERLINA                               #       N: HAS ZERLINA REACHED ZERO YET?
035954,000983: 21,2045           12027                           TCF      PREMON1                               #          N: DIMINISH ZERLINA, CONTINUE
035955,000984: 21,2046           34740        RESETRPT           CAF      BIT12                                 #          Y: RESET RUPT, TERMINATE
035956,000985: 21,2047           00006                           EXTEND                                         
035957,000986: 21,2050           05013                           WOR      CHAN13                                
035958,000987: 21,2051           15261                           TCF      TASKOVER                              
035959,000988: 
035960,000989: 21,2052           30001        COUNT'EM           CA       L                                     
035961,000990: 21,2053           74746                           MASK     -AZBIT                                
035962,000991: 21,2054           10000                           CCS      A                                     
035963,000992: 21,2055           42100        -AZ                CS       AZEACH                                
035964,000993: 21,2056           27643                           ADS      AZINCR1                               
035965,000994: 21,2057           30001                           CA       L                                     
035966,000995: 21,2060           74747                           MASK     +AZBIT                                
035967,000996: 21,2061           10000                           CCS      A                                     
035968,000997: 21,2062           32100        +AZ                CA       AZEACH                                
035969,000998: 21,2063           27643                           ADS      AZINCR1                               
035970,000999: 21,2064           30001                           CA       L                                     
035971,001000: 

Page 821

035973,001002: 21,2065           74753                           MASK     -ELBIT                                
035974,001003: 21,2066           10000                           CCS      A                                     
035975,001004: 21,2067           42101        -EL                CS       ELEACH                                
035976,001005: 21,2070           27642                           ADS      ELINCR1                               
035977,001006: 21,2071           30001                           CA       L                                     
035978,001007: 21,2072           74752                           MASK     +ELBIT                                
035979,001008: 21,2073           10000                           CCS      A                                     
035980,001009: 21,2074           32101        +EL                CA       ELEACH                                
035981,001010: 21,2075           27642                           ADS      ELINCR1                               
035982,001011: 21,2076           12046                           TCF      RESETRPT                              
035983,001012: 
035984,001013: 
035985,001014:                                                                                                  #  THESE EQUIVALENCIES ARE BASED ON GSOP CHAPTER 4, REVISION 16 OF P64LM
035986,001015: 
035987,001016: 21,2077     4752               +ELBIT             =        BIT2                                  #  -PITCH
035988,001017: 
035989,001018: 
035990,001019: 21,2077     4753               -ELBIT             =        BIT1                                  #  +PITCH
035991,001020: 
035992,001021: 
035993,001022: 21,2077     4747               +AZBIT             =        BIT5                                  
035994,001023: 
035995,001024: 
035996,001025: 21,2077     4746               -AZBIT             =        BIT6                                  
035997,001026: 
035998,001027: 21,2077           00063        ALL4BITS           OCT      00063                                 
035999,001028: 
036000,001029: 
036001,001030: 21,2100           01074        AZEACH             DEC      .03491                                #  2 DEGREES
036002,001031: 
036003,001032: 
036004,001033: 21,2101           00217        ELEACH             DEC      .00873                                #  1/2 DEGREE
036005,001034: 
036006,001035: 
036007,001036:                                                                                                  #  ****************************************************************************************************************
036008,001037:                                                                                                  #  R.O.D. TRAP
036009,001038:                                                                                                  #  ************************************************************************
036010,001039: 
036011,001040: 20,2115                                           BANK     20                                    
036012,001041: 20,2000                                           SETLOC   RODTRAP                               
036013,001042: 20,2000                                           BANK                                           
036014,001043: 20,2115                                           COUNT*   $$/F2DPS                              #  ****************************************
036015,001044: 
036016,001045: 20,2115           74745        DESCBITS           MASK     BIT7                                  #  COME HERE FROM MARKRUPT CODING WITH BIT
036017,001046: 20,2116           10000                           CCS      A                                     #    7 OR 6 OF CHANNEL 16 IN A: BIT 7 MEANS
036018,001047: 20,2117           44752                           CS       TWO                                   #    - RATE INCREMENT, BIT 6 + INCREMENT
036019,001048: 20,2120           64753                           AD       ONE                                   
036020,001049: 20,2121           27644                           ADS      RODCOUNT                              
036021,001050: 

Page 822

036023,001052: 20,2122           15270                           TCF      RESUME                                #  TRAP IS RESET WHEN SWITCH IS RELEASED
036024,001053: 
036025,001054: 
036026,001055: 31,3543                                           BANK     31                                    
036027,001056: 31,2000                                           SETLOC   F2DPS*31                              
036028,001057: 31,2000                                           BANK                                           
036029,001058: 
036030,001059: 31,3543                                           COUNT*   $$/F2DPS                              
036031,001060: 
036032,001061:                                                                                                  #  ****************************************************************************************************************
036033,001062:                                                                                                  #  DOUBLE PRECISION ROOT FINDER SUBROUTINE (BY ALLAN KLUMPP)
036034,001063:                                                                                                  #  ****************************************************************************************************************
036035,001064: 
036036,001065:                                                                                                  #                                                          N        N-1
036037,001066:                                                                                                  #           ROOTPSRS FINDS ONE ROOT OF THE POWER SERIES A X  + A   X    + ... + A X + A
036038,001067:                                                                                                  #                                                        N      N-1              1     0
036039,001068: 
036040,001069:                                                                                                  #  USING NEWTON'S METHOD STARTING WITH AN INITIAL GUESS FOR THE ROOT.  THE ENTERING DATA MUST BE AS FOLLOWS:
036041,001070: 
036042,001071:                                                                                                  #                                          A        SP     LOC-3            ADRES FOR REFERENCING PWR COF TABL
036043,001072:                                                                                                  #                                          L        SP     N-1              N IS THE DEGREE OF THE POWER SERIES
036044,001073:                                                                                                  #                                          MPAC     DP     X                INITIAL GUESS FOR ROOT
036045,001074: 
036046,001075:                                                                                                  #                                          LOC-2N   DP     A(0)
036047,001076:                                                                                                  #                                                   ...
036048,001077:                                                                                                  #                                          LOC      DP     A(N)
036049,001078:                                                                                                  #                                          LOC+2    SP     PRECROOT         PREC RQD OF ROOT (AS FRACT OF 1ST GUESS)
036050,001079: 
036051,001080:                                                                                                  #  THE DP RESULT IS LEFT IN MPAC UPON EXIT, AND A SP COUNT OF THE ITERATIONS TO CONVERGENCE IS LEFT IN MPAC+2.
036052,001081:                                                                                                  #  RETURN IS NORMALLY TO LOC(TC ROOTPSRS)+3.   IF ROOTPSRS FAILS TO CONVERGE IN 32 PASSES, RETURN IS TO LOC+1 AND
036053,001082:                                                                                                  #  OUTPUTS ARE NOT TO BE TRUSTED.
036054,001083: 
036055,001084:                                                                                                  #           PRECAUTION: ROOTPSRS MAKES NO CHECKS FOR OVERFLOW OR FOR IMPROPER USAGE. IMPROPER USAGE COULD
036056,001085:                                                                                                  #  PRECLUDE CONVERGENCE OR REQUIRE EXCESSIVE ITERATIONS. AS A SPECIFIC EXAMPLE, ROOTPSRS FORMS A DERIVATIVE
036057,001086:                                                                                                  #  COEFFICIENT TABLE BY MULTIPLYING EACH A(I) BY I, WHERE I RANGES FROM 1 TO N. IF AN ELEMENT OF THE DERIVATIVE
036058,001087:                                                                                                  #  COEFFICIENT TABLE = 1 OR > 1 IN MAGNITUDE, ONLY THE EXCESS IS RETAINED. ROOTPSRS MAY CONVERGE ON THE CORRECT
036059,001088:                                                                                                  #  ROOT NONETHELESS, BUT IT MAY TAKE AN EXCESSIVE NUMBER OF ITERATIONS. THEREFORE THE USER SHOULD RECOGNIZE:
036060,001089: 
036061,001090:                                                                                                  #  1. USER'S RESPONSIBILITY TO ASSURE THAT I X A(I) < 1 IN MAGNITUDE FOR ALL I.
036062,001091: 
036063,001092:                                                                                                  #  2. USER'S RESPONSIBILITY TO ASSURE OVERFLOW WILL NOT OCCUR IN EVALUATING EITHER THE RESIDUAL OR THE DERIVATIVE
036064,001093:                                                                                                  #     POWER SERIES.   THIS OVERFLOW WOULD BE PRODUCED BY SUBROUTINE POWRSERS, CALLED BY ROOTPSRS, AND MIGHT NOT
036065,001094:                                                                                                  #     PRECLUDE EVENTUAL CONVERGENCE.
036066,001095: 
036067,001096:                                                                                                  #  3. AT PRESENT, ERASABLE LOCATIONS ARE RESERVED ONLY FOR N UP TO 5.  AN N IN EXCESS OF 5 WILL PRODUCE CHAOS.
036068,001097:                                                                                                  #     ALL ERASABLES USED BY ROOTPSRS ARE UNSWITCHED LOCATED IN THE REGION FROM MPAC-33 OCT TO MPAC+7.
036069,001098: 
036070,001099:                                                                                                  #  4. THE ITERATION COUNT RETURNED IN MPAC+2 MAY BE USED TO DETECT ABNORMAL PERFORMANCE.
036071,001100: 
036072,001101:                                                                                                  #                                                                          STORE ENTERING DATA, INITLIZE ERASABLES
036073,001102: 

Page 823

036075,001104: 31,3543           00006        ROOTPSRS           EXTEND                                         
036076,001105: 31,3544           22132                           QXCH     RETROOT                               #  RETURN ADRES
036077,001106: 31,3545           54117                           TS       PWRPTR                                #  PWR TABL POINTER
036078,001107: 31,3546           52160                           DXCH     MPAC       +3                         #  PWR TABL ADRES, N-1
036079,001108: 31,3547           33666                           CA       DERTABLL                              
036080,001109: 31,3550           54141                           TS       DERPTR                                #  DER TABL POINTER
036081,001110: 31,3551           54161                           TS       MPAC       +5                         #  DER TABL ADRES
036082,001111: 31,3552           10160                           CCS      MPAC       +4                         #  NO POWER SERIES OF DEGREE 1 OR LESS
036083,001112: 31,3553           54162                           TS       MPAC       +6                         #  N-2
036084,001113: 31,3554           34755                           CA       ZERO                                  #  MODE USED AS ITERATION COUNTER. MODE
036085,001114: 31,3555           54163                           TS       MODE                                  #  MUST BE POS SO ABS WON'T COMP MPAC+3 ETC
036086,001115: 
036087,001116:                                                                                                  #  COMPUTE CRITERION TO STOP ITERATING
036088,001117: 
036089,001118: 31,3556           00006                           EXTEND                                         
036090,001119: 31,3557           30155                           DCA      MPAC                                  #  FETCH ROOT GUESS, KEEPING IT IN MPAC
036091,001120: 31,3560           52127                           DXCH     ROOTPS                                #  AND IN ROOTPS
036092,001121: 31,3561           50157                           INDEX    MPAC       +3                         #  PWR TABL ADRES
036093,001122: 31,3562           30005                           CA       5                                     #  PRECROOT TO A
036094,001123: 31,3563           07306                           TC       SHORTMP                               #  YIELDS DP PRODUCT IN MPAC
036095,001124: 31,3564           04713                           TC       USPRCADR                              
036096,001125: 31,3565           01226                           CADR     ABS                                   #  YIELDS ABVAL OF CRITERION ON DX IN MPAC
036097,001126: 31,3566           52155                           DXCH     MPAC                                  
036098,001127: 31,3567           52125                           DXCH     DXCRIT                                #  CRITERION
036099,001128: 
036100,001129:                                                                                                  #  SET UP DER COF TABL
036101,001130: 
036102,001131: 31,3570           00006                           EXTEND                                         
036103,001132: 31,3571           50117                           INDEX    PWRPTR                                
036104,001133: 31,3572           30004                           DCA      3                                     
036105,001134: 31,3573           52155                           DXCH     MPAC                                  #  A(N) TO MPAC
036106,001135: 
036107,001136: 31,3574           30160                           CA       MPAC       +4                         #  N-1 TO A
036108,001137: 
036109,001138: 31,3575           54140        DERCLOOP           TS       PWRCNT                                #  LOOP COUNTER
036110,001139: 31,3576           64753                           AD       ONE                                   
036111,001140: 31,3577           07315                           TC       DMPNSUB                               #  YIELDS DERCOF = I X A(I) IN MPAC
036112,001141: 31,3600           00006                           EXTEND                                         
036113,001142: 31,3601           50117                           INDEX    PWRPTR                                
036114,001143: 31,3602           30002                           DCA      1                                     
036115,001144: 31,3603           52155                           DXCH     MPAC                                  #  A(I-1) TO MPAC, FETCHING DERCOF
036116,001145: 31,3604           50141                           INDEX    DERPTR                                
036117,001146: 31,3605           52004                           DXCH     3                                     #  DERCOF TO DER TABL
036118,001147: 31,3606           44752                           CS       TWO                                   
036119,001148: 31,3607           26117                           ADS      PWRPTR                                #  DECREMENT PWR POINTER
036120,001149: 31,3610           44752                           CS       TWO                                   
036121,001150: 31,3611           26141                           ADS      DERPTR                                #  DECREMENT DER POINTER
036122,001151: 31,3612           10140                           CCS      PWRCNT                                
036123,001152: 31,3613           13575                           TCF      DERCLOOP                              
036124,001153: 
036125,001154: 

Page 824

036127,001156:                                                                                                  #  CONVERGE ON ROOT
036128,001157: 
036129,001158: 31,3614           00006        ROOTLOOP           EXTEND                                         
036130,001159: 31,3615           30127                           DCA      ROOTPS                                #  FETCH CURRENT ROOT
036131,001160: 31,3616           52155                           DXCH     MPAC                                  #  LEAVE IN MPAC
036132,001161: 31,3617           00006                           EXTEND                                         
036133,001162: 31,3620           30162                           DCA      MPAC       +5                         #  LOAD A, L WITH DER TABL ADRES, N-2
036134,001163: 31,3621           07214                           TC       POWRSERS                              #  YIELDS DERIVATIVE IN MPAC
036135,001164: 
036136,001165: 31,3622           00006                           EXTEND                                         
036137,001166: 31,3623           30127                           DCA      ROOTPS                                
036138,001167: 31,3624           52155                           DXCH     MPAC                                  #  CURRENT ROOT TO MPAC, FETCHING DERIVTIVE
036139,001168: 31,3625           52131                           DXCH     BUF                                   #  LEAVE DERIVATIVE IN BUF AS DIVISOR
036140,001169: 31,3626           00006                           EXTEND                                         
036141,001170: 31,3627           30160                           DCA      MPAC       +3                         #  LOAD A, L WITH PWR TABL ADRES, N-1
036142,001171: 31,3630           07214                           TC       POWRSERS                              #  YIELDS RESIDUAL IN MPAC
036143,001172: 
036144,001173: 31,3631           04713                           TC       USPRCADR                              
036145,001174: 31,3632           00353                           CADR     DDV/BDDV                              #  YIELDS -DX IN MPAC
036146,001175: 
036147,001176: 31,3633           00006                           EXTEND                                         
036148,001177: 31,3634           40155                           DCS      MPAC                                  #  FETCH DX, LEAVING -DX IN MPAC
036149,001178: 31,3635           20127                           DAS      ROOTPS                                #  CORRECTED ROOT NOW IN ROOTPS
036150,001179: 
036151,001180: 31,3636           04713                           TC       USPRCADR                              
036152,001181: 31,3637           01226                           CADR     ABS                                   #  YIELDS ABS(DX) IN MPAC
036153,001182: 31,3640           00006                           EXTEND                                         
036154,001183: 31,3641           40125                           DCS      DXCRIT                                
036155,001184: 31,3642           20155                           DAS      MPAC                                  #  ABS(DX)-ABS(DXCRIT) IN MPAC
036156,001185: 
036157,001186: 31,3643           24163                           INCR     MODE                                  #  INCREMENT ITERATION COUNTER
036158,001187: 31,3644           30163                           CA       MODE                                  
036159,001188: 31,3645           74750                           MASK     BIT4                                  #  KLUMPP SAYS GIVE UP AFTER EIGHT PASSES
036160,001189: 31,3646           10000                           CCS      A                                     
036161,001190: 31,3647           00132        BADROOT            TC       RETROOT                               
036162,001191: 
036163,001192: 31,3650           10154                           CCS      MPAC                                  #  TEST HI ORDER DX
036164,001193: 31,3651           13614                           TCF      ROOTLOOP                              
036165,001194: 31,3652           13654                           TCF      TESTLODX                              
036166,001195: 31,3653           13660                           TCF      ROOTSTOR                              
036167,001196: 31,3654           10155        TESTLODX           CCS      MPAC       +1                         #  TEST LO ORDER DX
036168,001197: 31,3655           13614                           TCF      ROOTLOOP                              
036169,001198: 31,3656           13660                           TCF      ROOTSTOR                              
036170,001199: 31,3657           13660                           TCF      ROOTSTOR                              
036171,001200: 31,3660           52127        ROOTSTOR           DXCH     ROOTPS                                
036172,001201: 31,3661           52155                           DXCH     MPAC                                  
036173,001202: 31,3662           30163                           CA       MODE                                  
036174,001203: 31,3663           54156                           TS       MPAC       +2                         #  STORE SP ITERATION COUNT IN MPAC+2
036175,001204: 31,3664           50132                           INDEX    RETROOT                               
036176,001205: 31,3665           10002                           TCF      2                                     
036177,001206: 

Page 825

036179,001208: 
036180,001209: 31,3666           00147        DERTABLL           ADRES    DERCOFN    -3                         
036181,001210: 
036182,001211:                                                                                                  #  ****************************************************************************************************************
036183,001212:                                                                                                  #  TRASHY LITTLE SUBROUTINES
036184,001213:                                                                                                  #  ****************************************************************************************************************
036185,001214: 
036186,001215: 31,3667           51620        INTPRETX           INDEX    WCHPHASE                              #  SET X1 ON THE WAY TO THE INTERPRETER
036187,001216: 31,3670           42510                           CS       TARGTDEX                              
036188,001217: 31,3671           50120                           INDEX    FIXLOC                                
036189,001218: 31,3672           54046                           TS       X1                                    
036190,001219: 31,3673           16036                           TCF      INTPRET                               
036191,001220: 
036192,001221: 
036193,001222: 31,3674           31640        TDISPSET           CA       TTF/8                                 
036194,001223: 31,3675           00006                           EXTEND                                         
036195,001224: 31,3676           74750                           MP       TSCALINV                              
036196,001225: 31,3677           53474                           DXCH     TTFDISP                               
036197,001226: 
036198,001227: 31,3700           31640                           CA       TTF/8                                 
036199,001228: 31,3701           00006                           EXTEND                                         
036200,001229: 31,3702           73740                           MP       SCTTFDSP                              
036201,001230: 31,3703           54001                           TS       L                                     
036202,001231: 31,3704           63736                           AD       99+LINT                               
036203,001232: 31,3705           00006                           EXTEND                                         
036204,001233: 31,3706           63717                           BZMF     +11                                   
036205,001234: 31,3707           40001                           CS       L                                     
036206,001235: 31,3710           63737                           AD       -LINT                                 
036207,001236: 31,3711           00006                           EXTEND                                         
036208,001237: 31,3712           63715                           BZMF     +3                                    
036209,001238: 31,3713           55664                           TS       TREDES                                
036210,001239: 31,3714           00002                           TC       Q                                     
036211,001240: 
036212,001241: 31,3715           34755                           CA       ZERO                                  
036213,001242: 31,3716           13713                           TCF      -3                                    
036214,001243: 
036215,001244: 31,3717           33736                           CA       99+LINT                               
036216,001245: 31,3720           13710                           TCF      -10                                   
036217,001246: 
036218,001247: 
036219,001248:                                                                                                  #  ****************************************************************************************************************
036220,001249:                                                                                                  #  SPECIALIZED "PHASCHNG" SUBROUTINE
036221,001250:                                                                                                  #  ****************************************************************************************************************
036222,001251: 
036223,001252: 31,3721  E3,1440                                  EBANK=   PHSNAME2                              
036224,001253: 31,3721           35007        FASTCHNG           CA       EBANK3                                #  SPECIALIZED 'PHASCHNG' ROUTINE
036225,001254: 31,3722           56003                           XCH      EBANK                                 
036226,001255: 31,3723           52002                           DXCH     L                                     
036227,001256: 31,3724           55442                           TS       PHSNAME3                              
036228,001257: 31,3725           22003                           LXCH     EBANK                                 
036229,001258: 

Page 826

036231,001260: 31,3726  E7,1617                                  EBANK=   E2DPS                                 
036232,001261: 31,3726           00000                           TC       A                                     
036233,001262: 
036234,001263: 
036235,001264:                                                                                                  #  ****************************************************************************************************************
036236,001265:                                                                                                  #  PARAMETER TABLE INDIRECT ADDRESSES
036237,001266:                                                                                                  #  ****************************************************************************************************************
036238,001267: 
036239,001268: 31,3727  E5,1402               RDG                =        RBRFG                                 
036240,001269: 31,3727  E5,1410               VDG                =        VBRFG                                 
036241,001270: 31,3727  E5,1416               ADG                =        ABRFG                                 
036242,001271: 31,3727  E5,1424               VDG2TTF            =        VBRFG*                                
036243,001272: 31,3727  E5,1426               ADG2TTF            =        ABRFG*                                
036244,001273: 31,3727  E5,1430               JDG2TTF            =        JBRFG*                                
036245,001274: 
036246,001275:                                                                                                  #  ****************************************************************************************************************
036247,001276:                                                                                                  #  LUNAR LANDING CONSTANTS
036248,001277:                                                                                                  #  ***************************************************************************************************************
036249,001278: 
036250,001279: 31,3727           00046        3SEC*17            DEC      +3         E2         B-17            
036251,001280: 
036252,001281: 
036253,001282: 31,3730           00175        10SEC*17           DEC      +10        E2         B-17            
036254,001283: 
036255,001284: 
036256,001285: 31,3731           00372        20SEC*17           DEC      +20        E2         B-17            
036257,001286: 
036258,001287: 
036259,001288: 31,3732           00567        30SEC*17           DEC      +30        E2         B-17            
036260,001289: 
036261,001290: 
036262,001291: 31,3733           01563        TABLTTFL           ADRES    TABLTTF    +3                         #  ADDRESS FOR REFERENCING TTF TABLE
036263,001292: 
036264,001293: 
036265,001294: 31,3734           00021 11422  HIGHESTF           2DEC     +43245     E-4        B-12            #  THRUST FOR RADIAL CONTROL
036266,001295: 31,3736     4740               TTFSCALE           =        BIT12                                 
036267,001296: 
036268,001297: 
036269,001298: 31,3736     4750               TSCALINV           =        BIT4                                  
036270,001299: 
036271,001300: 
036272,001301: 31,3736           00167        99+LINT            DEC      +119       B-14                       
036273,001302: 
036274,001303: 
036275,001304: 31,3737           77753        -LINT              DEC      -20        B-14                       
036276,001305: 
036277,001306: 
036278,001307: 31,3740           02437        SCTTFDSP           DEC      .08                                   #  RESCALES FROM 2(-17) CS TO WHOLE SECONDS
036279,001308: 
036280,001309: 

Page 827

036282,001311: 31,3741           00264        180DEGS            DEC      +180       B-14                       
036283,001312: 
036284,001313: 
036285,001314: 31,3742           00056        1/2DEG             DEC      +.00278                               
036286,001315: 
036287,001316: 
036288,001317: 31,3743           74110        DELTTFAP           DEC      -158       E2         B-17            
036289,001318: 
036290,001319: 
036291,001320: 31,3744           01130 00000  TAUVERT            2DEC     600        B-14                       
036292,001321: 
036293,001322: 
036294,001323: 31,3746           02260 00000  TAUROD             2DEC     300        B-12                       
036295,001324: 
036296,001325: 
036297,001326: 31,3750           01440 00000  GSCALE             2DEC     100        B-11                       
036298,001327: 
036299,001328: 
036300,001329: 31,3752           14000 00000  3/8DP              2DEC     .375000000                            
036301,001330: 
036302,001331: 
036303,001332: 31,3754           30000 00000  3/4DP              2DEC     .750000000                            
036304,001333: 31,3756           01437        +1FPS              DEC      .3048      E-2        B+4             
036305,001334: 
036306,001335: 
036307,001336: 31,3757           00000 04535  +3FPS              2DEC     +0.9144    E-2        B-10            
036308,001337: 
036309,001338: 
036310,001339: 31,3761           77656 42436  DEPRCRIT           2DEC     -.02       B-2                        #  DEPRESSION ANGLE CRITERION
036311,001340: 
036312,001341: 
036313,001342: 31,3763           01542        PROJMAX            DEC      .42262     B-3                        #  SIN(25')/8 TO COMPARE WITH PROJ
036314,001343: 
036315,001344: 
036316,001345: 31,3764           01022        PROJMIN            DEC      .25882     B-3                        #  SIN(15')/8 TO COMPARE WITH PROJ
036317,001346: 
036318,001347: 
036319,001348: 31,3765           01477        V06N63             VN       0663                                  #  P63
036320,001349: 
036321,001350: 31,3766           01500        V06N64             VN       0664                                  #  P64
036322,001351: 
036323,001352: 31,3767           01474        V06N60             VN       0660                                  #  P65, P66, P67
036324,001353: 

Page 828

036326,001355:                                                                                                  #  ****************************************************************************************************************
036327,001356:                                                                                                  #  ****************************************************************************************************************

End of include-file LUNAR_LANDING_GUIDANCE_EQUATIONS.agc.  Parent file is MAIN.agc