Source Code
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These source-code files are part of a reconstructed copy of Luminary 97, the
original release of the Apollo 11 Lunar Module (LM) Apollo Guidance Computer
(AGC) software.
The reconstruction began with source code of Luminary 99 revision 1 previously
transcribed from a digitized copy of that program. The code was then updated
by undoing changes described in original Luminary memos 83 and 85, using asterisks
indicating changed lines in the listing as a guide. The reconstruction was
verified by matching memory-bank checksums to those listed in drawing 2021152D.
Note that page numbers in the reconstructed code match those on the Luminary 099
revision 001 printout, although the added code would likely have changed page
numbers for a real Luminary 97 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.
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030043,000002: ## Copyright: Public domain.
030044,000003: ## Filename: R30.agc
030045,000004: ## Purpose: A section of Luminary revision 97.
030046,000005: ## It is part of the reconstructed source code for the
030047,000006: ## original release of the flight software for the Lunar
030048,000007: ## Module's (LM) Apollo Guidance Computer (AGC) for Apollo 11.
030049,000008: ## The code has been recreated from a copy of Luminary 99
030050,000009: ## revision 001, using asterisks indicating changed lines in
030051,000010: ## the listing and Luminary Memos #83 and #85, which list
030052,000011: ## changes between Luminary 97 and 98, and 98 and 99. The
030053,000012: ## code has been adapted such that the resulting bugger words
030054,000013: ## exactly match those specified for Luminary 97 in NASA drawing
030055,000014: ## 2021152D, which gives relatively high confidence that the
030056,000015: ## reconstruction is correct.
030057,000016: ## Reference: pp. 712-722
030058,000017: ## Assembler: yaYUL
030059,000018: ## Contact: Ron Burkey <info@sandroid.org>.
030060,000019: ## Website: www.ibiblio.org/apollo/index.html
030061,000020: ## Mod history: 2019-07-28 MAS Created from Luminary 99.
030062,000021:
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Page 712
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030064,000023: # SUBROUTINE NAME: V82CALL
030065,000024: # MOD NO: 0 DATE: 16 FEB 67
030066,000025: # MOD BY: RR BAIRNSFATHER LOG SECTION: R30
030067,000026: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 11 APR 67 SR30.1 CHANGED TO ALLOW MONITOR OPERN
030068,000027: # MOD NO: 2 MOD BY ALONSO DATE: 11 DEC 67 VB82 PROGRAM REWRITTEN
030069,000028: # MOD NO: 3 MOD BY ALONSO DATE: 26 MAR 68 PROG MOD TO HANDLE DIF EARTH/MOON SCALE
030070,000029:
030071,000030: # NEW FUNCTIONAL DESCRIPTION: CALLED BY VERB 82 ENTER. PRIORITY 10
030072,000031: # USED THROUGHOUT. CALCULATE AND DISPLAY ORBITAL PARAMETERS
030073,000032:
030074,000033: # 1. IF AVERAGE G IS OFF:
030075,000034: # FLASH DISPLAY V04N06. R2 INDICATES WHICH SHIP'S STATE VECTOR IS
030076,000035: # TO BE UPDATED. INITIAL CHOICE IS THIS SHIP (R2=1). ASTRONAUT
030077,000036: # CAN CHANGE TO OTHER SHIP BY V22EXE, WHERE X NOT EQ 1.
030078,000037: # SELECTED STATE VECTOR UPDATED BY THISPREC (OTHPREC).
030079,000038: # CALLS SR30.1 (WHICH CALLS TFFCONMU + TFFRP/RA) TO CALCULATE
030080,000039: # RPER (PERIGEE RADIUS), RAPO (APOGEE RADIUS), HPER (PERIGEE
030081,000040: # HEIGHT ABOVE LAUNCH PAD OR LUNAR LANDING SITE), HAPO (APOGEE
030082,000041: # HEIGHT AS ABOVE), TPER (TIME TO PERIGEE), TFF (TIME TO
030083,000042: # INTERSECT 300 KFT ABOVE PAD OR 35KFT ABOVE LANDING SITE).
030084,000043: # FLASH MONITOR V16N44 (HAPO, HPER, TFF). TFF IS -59M59S IF IT WAS
030085,000044: # NOT COMPUTABLE, OTHERWISE IT INCREMENTS ONCE PER SECOND.
030086,000045: # ASTRONAUT HAS OPTION TO MONITOR TPER BY KEYING IN N 32 E.
030087,000046: # DISPLAY IS IN HMS, IS NEGATIVE (AS WAS TFF), AND INCREMENTS
030088,000047: # ONCE PER SECOND ONLY IF TFF DISPLAY WAS -59M59S.
030089,000048: # 2. IF AVERAGE G IS ON:
030090,000049: # CALLS SR30.1 APPROX EVERY TWO SECS. STATE VECTOR IS ALWAYS
030091,000050: # FOR THIS VEHICLE. V82 DOES NOT DISTURB STATE VECTOR. RESULTS
030092,000051: # OF SR30.1 ARE RAPO, RPER, HAPO, HPER, TPER, TFF.
030093,000052: # FLASH MONITOR V16N44 (HAPO, HPER, TFF).
030094,000053: # ADDENDUM: HAPO AND HPER SHOULD BE CHANGED TO READ HAPOX AND HPERX IN THE
030095,000054: # ABOVE REMARKS.
030096,000055:
030097,000056: # CALLING SEQUENCE: VERB 82 ENTER.
030098,000057:
030099,000058: # SUBROUTINES CALLED: SR30.1, GOXDSPF
030100,000059: # MAYBE - THISPREC, OTHPREC, LOADTIME, DELRSPL
030101,000060:
030102,000061: # NORMAL EXIT MODES: TC ENDEXT
030103,000062:
030104,000063: # ALARMS: NONE
030105,000064:
030106,000065: # OUTPUT: HAPOX (-29) M
030107,000066: # HPERX (-29) M
030108,000067: # RAPO (-29) M EARTH
030109,000068: # (-27) M MOON
030110,000069: # RPER (-29) M EARTH
030111,000070: # (-27) M MOON
030112,000071: # TFF (-28) CS CONTAINS NEGATIVE QUANTITY
030113,000072: # -TPER (-28) CS CONTAINS NEGATIVE QUANTITY
030114,000073:
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Page 713
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030116,000075: # ERASABLE INITIALIZATION REQUIRED: STATE VECTOR.
030117,000076:
030118,000077: # DEBRIS: QPRET, RONE, VONE, TFF/RTMU, HPERMIN, RPADTEM, V82EMFLG.
030119,000078: # MAYBE: TSTART82, V82FLAGS, TDEC1.
030120,000079:
030121,000080: 13,2351 E4,1517 EBANK= HAPOX
030122,000081: 31,2144 BANK 31
030123,000082: 22,2000 SETLOC R30LOC
030124,000083: 22,2000 BANK
030125,000084: 22,3242 COUNT* $$/R30
030126,000085:
030127,000086: 22,3242 06037 V82CALL TC INTPRET
030128,000087: 22,3243 52014 BON GOTO
030129,000088: 22,3244 03712 AVEGFLAG
030130,000089: 22,3245 45465 V82GON # IF AVERAGE G ON
030131,000090: 22,3246 45247 V82GOFF # IF AVERAGE G OFF
030132,000091:
030133,000092: 22,3247 77776 V82GOFF EXIT # ALLOW ASTRONAUT TO SELECT VEHICLE
030134,000093: 22,3250 34752 CAF TWO # DESIRED FOR ORBITAL PARAMETERS
030135,000094: 22,3251 55051 TS OPTIONX # CALCULATION AND DISPLAY.
030136,000095: 22,3252 34753 CAF ONE
030137,000096: 22,3253 55052 TS OPTIONX +1
030138,000097: 22,3254 33316 CAF OPTIONVN # V 04 N 06
030139,000098: 22,3255 04616 TC BANKCALL
030140,000099: 22,3256 20334 CADR GOXDSPF
030141,000100: 22,3257 05472 TC ENDEXT # TERMINATE
030142,000101: 22,3260 03262 TC +2 # PROCEED
030143,000102: 22,3261 03254 TC -5 # DATA IN. OPTION1+1 = 1 FOR THIS VEHICLE.
030144,000103: # UNEQ 1 FOR OTHER VEHICLE.
030145,000104: 22,3262 34750 CAF BIT4 # 80 MS
030146,000105: 22,3263 05203 TC WAITLIST
030147,000106: 22,3264 E4,1540 EBANK= TFF
030148,000107: 22,3264 03430 44064 2CADR TICKTEST
030149,000108:
030150,000109: 22,3266 00003 RELINT
030151,000110: 22,3267 33320 V82GOFLP CAF TFFBANK # MAJOR RECYCLE LOOP ENTRY
030152,000111: 22,3270 54003 TS EBANK
030153,000112: 22,3271 34755 CAF ZERO
030154,000113: 22,3272 55537 TS V82FLAGS # ZERO FLAGS FOR TICKTEST. INHIBITS
030155,000114: # DECREMENTING OF TFF AND -TPER.
030156,000115: 22,3273 35021 CAF PRIO7
030157,000116: 22,3274 05105 TC FINDVAC # V82GOFF1 WILL EXECUTE STATE VECTOR
030158,000117: 22,3275 E4,1540 EBANK= TFF # UPDATE AND ORBIT CALCULATIONS FOR
030159,000118: 22,3275 03321 44064 2CADR V82GOFF1 # SELECTED VEHICLE ABOUT PROPER BODY.
030160,000119:
030161,000120: 22,3277 00003 RELINT
030162,000121: 22,3300 36245 V82STALL CAF THREE # STALL IN THIS LOOP AND WITHOLD V 16 N 44
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Page 714
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030164,000123: 22,3301 71537 MASK V82FLAGS # UNTIL STATE VECTOR UPDATE SETS ONE OF
030165,000124: 22,3302 10000 CCS A # OUR FLAG BITS.
030166,000125: 22,3303 03310 TC FLAGGON # EXIT FROM STALL LOOP.
030167,000126: 22,3304 34777 CAF 1SEC
030168,000127: 22,3305 04616 TC BANKCALL
030169,000128: 22,3306 01735 CADR DELAYJOB
030170,000129: 22,3307 03300 TC V82STALL
030171,000130:
030172,000131: 22,3310 33317 FLAGGON CAF V16N44 # MONITOR HAPO,HPER,TFF.
030173,000132: 22,3311 04616 TC BANKCALL
030174,000133: 22,3312 20334 CADR GOXDSPF
030175,000134: 22,3313 05563 TC B5OFF # TERM THIS TELLS TICKTEST TO KILL ITSELF
030176,000135: 22,3314 05563 TC B5OFF # PROCEED DITTO
030177,000136: 22,3315 03267 TC V82GOFLP # RECYCLE RECOMPUTE STATE VECT + DISPLAY
030178,000137:
030179,000138: 22,3316 01014 OPTIONVN VN 412
030180,000139: 22,3317 04054 V16N44 VN 1644
030181,000140: 22,3320 02140 TFFBANK ECADR TFF
030182,000141:
030183,000142: 22,3321 06037 V82GOFF1 TC INTPRET
030184,000143: 22,3322 77634 RTB
030185,000144: 22,3323 21573 LOADTIME
030186,000145: 22,3324 00041 STORE TDEC1 # TIME FOR STATE VECTOR UPDATE.
030187,000146: 22,3325 02205 STORE TSTART82 # TIME FOR INTERNAL USE.
030188,000147: 22,3326 77776 EXIT
030189,000148: 22,3327 41052 CS OPTIONX +1 # 1 FOR THIS VEHICLE, NOT 1 FOR OTHER.
030190,000149: 22,3330 64753 AD ONE
030191,000150: 22,3331 00006 EXTEND
030192,000151: 22,3332 13356 BZF THISSHIP
030193,000152: 22,3333 06037 OTHSHIP TC INTPRET
030194,000153: 22,3334 77624 CALL # CALL STATE VECTOR UPDATE FOR OTHER SHIP.
030195,000154: 22,3335 27043 OTHPREC
030196,000155: 22,3336 77775 BOTHSHIP VLOAD # MOVE RESULTS INTO TFFCONIC STORAGE AREAS
030197,000156: 22,3337 00001 RATT # TO BE CALLED BY SR30.1.
030198,000157: 22,3340 26207 STOVL RONE # RATT AT (-29)M FOR EARTH OR MOON
030199,000158: 22,3341 00007 VATT
030200,000159: 22,3342 02215 STORE VONE # VATT AT (-7)M/CS FOR EARTH OR MOON
030201,000160: 22,3343 77743 DLOAD*
030202,000161: 22,3344 73774 1/RTMUE,2 # X2 IS 0 FOR EARTH CENTERED STATE VEC
030203,000162: 22,3345 00037 STORE TFF/RTMU # X2 IS 2 FOR MOON
030204,000163: 22,3346 77743 DLOAD* # AS LEFT BY THISPREC OR OTHPREC.
030205,000164: 22,3347 72411 MINPERE,2
030206,000165: 22,3350 02201 STORE HPERMIN # TFFRTMU, HPERMIN AND RPADTEM ARE ALL
030207,000166: 22,3351 46135 SLOAD BHIZ # EARTH/MOON PARAMETERS AS SET HERE.
030208,000167: 22,3352 00050 X2
030209,000168: 22,3353 45367 EARTHPAD
030210,000169: 22,3354 77650 GOTO
030211,000170: 22,3355 45373 MOONPAD
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Page 715
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030213,000172: 22,3356 06037 THISSHIP TC INTPRET
030214,000173: 22,3357 77624 CALL # CALL STATE VECTOR UPDATE FOR THIS SHIP.
030215,000174: 22,3360 27057 THISPREC
030216,000175: 22,3361 77650 GOTO
030217,000176: 22,3362 45336 BOTHSHIP
030218,000177:
030219,000178: # THE FOLLOWING CONSTANTS ARE PAIRWISE INDEXED. DO NOT SEPARATE PAIRS.
030220,000179:
030221,000180: 22,3363 00001 11530 MINPERM 2DEC 10668 B-27 # 35 KFT MIN PERIGEE HEIGHT FOR MOON(-27)M
030222,000181:
030223,000182: 22,3365 00002 31230 MINPERE 2DEC 91440 B-29 # 300 KFT (-29)M FOR EARTH
030224,000183:
030225,000184: 22,3367 43145 EARTHPAD DLOAD CLRGO # PAD 37-B RADIUS. SCALED AT (-29)M.
030226,000185: 22,3370 06315 RPAD
030227,000186: 22,3371 03635 V82EMFLG # INDICATE EARTH SCALING FOR SR30.1
030228,000187: 22,3372 45377 BOTHPAD
030229,000188:
030230,000189: 22,3373 51575 MOONPAD VLOAD ABVAL # COMPUTE MOON PAD RADIUS FROM RLS VECTOR.
030231,000190: 22,3374 02023 RLS # SCALED AT (-27)M.
030232,000191: 22,3375 77614 SET
030233,000192: 22,3376 03475 V82EMFLG # INDICATE MOON SCALING FOR SR30.1
030234,000193: 22,3377 36203 BOTHPAD STCALL RPADTEM
030235,000194: 22,3400 45551 SR30.1 # CALCULATE ORBITAL PARAMETERS
030236,000195: 22,3401 45234 RTB DSU
030237,000196: 22,3402 21573 LOADTIME
030238,000197: 22,3403 02205 TSTART82 # PRESENT TIME - TIME V82GOFF1 BEGAN
030239,000198: 22,3404 02205 STORE TSTART82 # SAVE IT
030240,000199: 22,3405 53145 DLOAD BZE # SR30.1 SETS -TPER=0 IF HPER L/
030241,000200: 22,3406 02143 -TPER # HPERMIN (300 OR 35) KFT.
030242,000201: 22,3407 45420 TICKTIFF # (-TPER = 0)
030243,000202: 22,3410 43345 TICKTPER DLOAD DAD # (-TPER NON ZERO) TFF WAS NOT COMPUTED,
030244,000203: 22,3411 02143 -TPER # BUT WAS SET TO 59M59S. DONT TICK TFF, DO
030245,000204: 22,3412 02205 TSTART82 # TICK -TPER. DISPLAY BOTH.
030246,000205: 22,3413 02143 STORE -TPER # -TPER CORRECTED FOR TIME SINCE V82GOFF1
030247,000206: 22,3414 77776 EXIT # BEGAN.
030248,000207: 22,3415 34753 CAF BIT1
030249,000208: 22,3416 55537 TS V82FLAGS # INFORMS TICKTEST TO INCREMENT ONLY -TPER
030250,000209: 22,3417 05155 TC ENDOFJOB
030251,000210:
030252,000211: 22,3420 43345 TICKTIFF DLOAD DAD # (-TPER=0) TFF WAS COMPUTED. TICK TFF.
030253,000212: 22,3421 02141 TFF # DO NOT TICK -TPER. DISPLAY TFF, BUT NOT
030254,000213: 22,3422 02205 TSTART82 # -TPER.
030255,000214: 22,3423 02141 STORE TFF # TFF CORRECTED FOR TIME SINCE V82GOFF1
030256,000215: 22,3424 77776 EXIT # BEGAN.
030257,000216: 22,3425 34752 CAF BIT2
030258,000217: 22,3426 55537 TS V82FLAGS # INFORMS TICKTEST TO INCREMENT ONLY TFF.
030259,000218: 22,3427 05155 TC ENDOFJOB
030260,000219:
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Page 716
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030262,000221: 22,3430 34747 TICKTEST CAF BIT5 # THIS WAITLIST PROGRAM PERPETUATES ITSELF
030263,000222: 22,3431 71044 MASK EXTVBACT # ONCE A SEC UNTIL BIT 5 OF EXTVBACT =0.
030264,000223: 22,3432 10000 CCS A
030265,000224: 22,3433 03441 TC DOTICK
030266,000225: 22,3434 37713 CAF PRIO25
030267,000226: 22,3435 05072 TC NOVAC # TERMINATE V 82. CANT CALL ENDEXT IN RUPT.
030268,000227: 22,3436 1044 EBANK= EXTVBACT
030269,000228: 22,3436 05472 04062 2CADR ENDEXT
030270,000229:
030271,000230: 22,3440 05261 TC TASKOVER
030272,000231: 22,3441 34777 DOTICK CAF 1SEC # RE-REQUEST TICKTEST.
030273,000232: 22,3442 05203 TC WAITLIST
030274,000233: 22,3443 E4,1540 EBANK= TFF
030275,000234: 22,3443 03430 44064 2CADR TICKTEST
030276,000235:
030277,000236: 22,3445 36245 CAF THREE
030278,000237: 22,3446 71537 MASK V82FLAGS
030279,000238: 22,3447 50000 INDEX A
030280,000239: 22,3450 03451 TC +1
030281,000240: 22,3451 05261 TC TASKOVER # IF NO FLAGBITS SET DONT CHANGE TFF OR
030282,000241: # -TPER, BUT CONTINUE LOOP.
030283,000242: 22,3452 03460 TC TPERTICK # ONLY BIT 1 SET. INCR -TPER BY 1 SEC.
030284,000243: 22,3453 34777 TFFTICK CAF 1SEC # ONLY BIT 2 SET. INCR TFF BY 1 SEC.
030285,000244: 22,3454 54001 TS L
030286,000245: 22,3455 34755 CAF ZERO
030287,000246: 22,3456 21541 DAS TFF
030288,000247: 22,3457 05261 TC TASKOVER
030289,000248: 22,3460 34777 TPERTICK CAF 1SEC
030290,000249: 22,3461 54001 TS L
030291,000250: 22,3462 34755 CAF ZERO
030292,000251: 22,3463 21543 DAS -TPER
030293,000252: 22,3464 05261 TC TASKOVER
030294,000253:
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Page 717
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030296,000255: 22,3465 77776 V82GON EXIT # AVERAGE G ON. USE CURRENT STATE VECTOR
030297,000256: # FOR ORBITAL PARAMETER CALCULATIONS.
030298,000257: 22,3466 35021 CAF PRIO7 # LESS THAN LAMBERT
030299,000258: 22,3467 05105 TC FINDVAC # V82GON1 WILL PERFORM ORBIT CALCULATIONS
030300,000259: 22,3470 E4,1540 EBANK= TFF # ABOUT PROPER BODY APPROX ONCE PER SEC.
030301,000260: 22,3470 03503 44064 2CADR V82GON1
030302,000261:
030303,000262: 22,3472 00003 RELINT
030304,000263: 22,3473 10067 CCS NEWJOB # WITHOLD V16 N44 UNTIL FIRST ORBIT CALC
030305,000264: 22,3474 05122 TC CHANG1 # IS DONE. NOTE: V82GON1 (PRIO7, FINDVAC
030306,000265: # JOB) IS COMPLETED BEFORE V82GON (PRIO7,
030307,000266: # NOVAC JOB).
030308,000267: 22,3475 33317 V82REDSP CAF V16N44 # MONITOR HAPO, HPER, TFF
030309,000268: 22,3476 04616 TC BANKCALL
030310,000269: 22,3477 20334 CADR GOXDSPF
030311,000270: 22,3500 05563 TC B5OFF # TERM THIS TELLS V82GON1 TO KILL ITSELF.
030312,000271: 22,3501 05563 TC B5OFF # PROC DITTO.
030313,000272: 22,3502 03475 TC V82REDSP # RECYCLE
030314,000273:
030315,000274: 22,3503 06037 V82GON1 TC INTPRET # THIS EXEC PROGRAM PERPETUATES ITSELF
030316,000275: # ONCE A SEC UNTIL BIT 5 OF EXTVBACT =0.
030317,000276: 22,3504 52175 VLOAD GOTO # HOLDS OFF CCS NEWJOB BETWEEN RN AND
030318,000277: 22,3505 01221 RN # VN FETCH SO RN, VN ARE FROM SAME
030319,000278: 22,3506 45507 NEXTLINE # STATE VECTOR UPDATE.
030320,000279: 22,3507 26207 NEXTLINE STOVL RONE # RN AT (-29)M FOR EARTH OR MOON
030321,000280: 22,3510 01227 VN
030322,000281: 22,3511 02215 STORE VONE # VN AT (-7)M/CS FOR EARTH OR MOON
030323,000282: 22,3512 52014 BON GOTO
030324,000283: 22,3513 04304 MOONTHIS # FLAG INDICATES BODY ABOUT WHICH ORBITAL
030325,000284: 22,3514 45516 MOONGON # CALCULATIONS ARE TO BE PERFORMED.
030326,000285: 22,3515 45527 EARTHGON # IF SET - MOON, IF RESET - EARTH.
030327,000286:
030328,000287: 22,3516 71214 MOONGON SET DLOAD
030329,000288: 22,3517 03475 V82EMFLG # INDICATE MOON SCALING FOR SR30.1
030330,000289: 22,3520 04001 1/RTMUM # LUNAR PARAMETERS LOADED HERE FOR SR30.1
030331,000290: 22,3521 14037 STODL TFF/RTMU
030332,000291: 22,3522 05364 MINPERM
030333,000292: 22,3523 26201 STOVL HPERMIN
030334,000293: 22,3524 02023 RLS # SCALED AT (-27)M.
030335,000294: 22,3525 52046 ABVAL GOTO
030336,000295: 22,3526 45536 V82GON2
030337,000296: 22,3527 71214 EARTHGON CLEAR DLOAD
030338,000297: 22,3530 03675 V82EMFLG # INDICATE EARTH SCALING FOR SR30.1
030339,000298: 22,3531 04003 1/RTMUE # EARTH PARAMETERS LOADED HERE FOR SR30.1
030340,000299: 22,3532 14037 STODL TFF/RTMU
030341,000300: 22,3533 05366 MINPERE
030342,000301: 22,3534 16201 STODL HPERMIN
030343,000302: 22,3535 06315 RPAD
030344,000303: 22,3536 36203 V82GON2 STCALL RPADTEM # COMMON CODE FOR EARTH & MOON.
030345,000304: 22,3537 45551 SR30.1
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Page 718
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030347,000306: 22,3540 77776 EXIT
030348,000307: 22,3541 34747 V82GON3 CAF BIT5
030349,000308: 22,3542 71044 MASK EXTVBACT # SEE IF ASTRONAUT HAS SIGNALLED TERMINATE
030350,000309: 22,3543 00006 EXTEND
030351,000310: 22,3544 15472 BZF ENDEXT # YES, TERMINATE VB 82 LOOP
030352,000311: 22,3545 34777 CAF 1SEC
030353,000312: 22,3546 04616 TC BANKCALL # WAIT ONE SECOND BEFORE REPEATING
030354,000313: 22,3547 01735 CADR DELAYJOB # ORBITAL PARAMETER COMPUTATION.
030355,000314: 22,3550 03503 TC V82GON1
030356,000315:
030357,000316: 22,3551 22,3541 SPLRET = V82GON3
030358,000317:
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Page 719
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030360,000319: # SUBROUTINE NAME: SR30.1
030361,000320: # MOD NO: 0 DATE: 16 FEB 67
030362,000321: # MOD BY: RR BAIRNSFATHER LOG SECTION: R32
030363,000322: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 11 APR 67 SR30.1 CHANGED TO ALLOW MONITOR OPERN
030364,000323: # MOD NO: 2 MOD BY: RR BAIRNSFATHER DATE: 14 APR 67 ADD OVFL CK FOR RAPO
030365,000324: # MOD NO: 3 MOD BY ALONSO DATE: 11 DEC 67 SUBROUTINE REWRITTEN
030366,000325: # MOD NO: 4 MOD BY ALONSO DATE: 26 MAR 68 PROG MOD TO HANDLE DIF EARTH/MOON SCALE
030367,000326: # MOD NO: 5 MOD BY: RR BAIRNSFATHER DATE: 6 AUG 68 OVFL CK FOR HAPO & HPER. VOIDS MOD #2.
030368,000327:
030369,000328: # NEW FUNCTIONAL DESCRIPTION: ORBITAL PARAMETERS DISPLAY FOR NOUNS 32 AND 44.
030370,000329: # SR30.1 CALLS TFFCONMU AND TFFRP/RA TO CALCULATE RPER (PERIGEE RADIUS),
030371,000330: # RAPO (APOGEE RADIUS), HPER (PERIGEE HEIGHT ABOVE LAUNCH PAD OR LUNAR
030372,000331: # LANDING SITE), HAPO (APOGEE HEIGHT AS ABOVE), TPER (TIME TO PERIGEE),
030373,000332: # TFF (TIME TO INTERSECT 300 KFT ABOVE PAD OR 35KFT ABOVE LANDING SITE).
030374,000333: # IF HPER IS GREATER THAN OR EQUAL TO HPERMIN, CALCULATES TPER AND STORES
030375,000334: # NEGATIVE IN -TPER. OTHERWISE STORES +0 IN -TPER. WHENEVER TPER IS
030376,000335: # CALCULATED, TFF IS NOT COMPUTABLE AND DEFAULTS TO -59MIN 59SEC. IF HAPO
030377,000336: # WOULD EXCEED 9999.9 NM, IT IS LIMITED TO THAT VALUE FOR DISPLAY.
030378,000337:
030379,000338: # ADDENDUM: HAPO AND HPER SHOULD BE CHANGED TO READ HAPOX AND HPERX IN THE
030380,000339: # ABOVE REMARKS.
030381,000340:
030382,000341: # CALLING SEQUENCE: CALL
030383,000342: # SR30.1
030384,000343:
030385,000344: # SUBROUTINES CALLED: TFFCONMU, TFFRP/RA, CALCTPER, CALCTFF
030386,000345:
030387,000346: # NORMAL EXIT MODE: CALLING LINE +1 (STILL IN INTERPRETIVE MODE)
030388,000347:
030389,000348: # ALARMS: NONE
030390,000349:
030391,000350: # OUTPUT: RAPO (-29) M EARTH APOGEE RADIUS EARTH CENTERED COORD.
030392,000351: # (-27) M MOON MOON CENTERED COORD.
030393,000352: # RPER (-29) M EARTH PERIGEE RADIUS EARTH CENTERED COORD.
030394,000353: # (-27) M MOON MOON CENTERED COORD.
030395,000354: # HAPOX (-29) M APOGEE ALTITUDE ABOVE PAD OR LAND. SITE MAX VALUE LIMITED TO 9999.9 NM.
030396,000355: # HPERX (-29) M PERIGEE ALT. ABOVE PAD OR LAND. SITE MAX VALUE LIMITED TO 9999.9 NM.
030397,000356: # TFF (-28) CS TIME TO 300KFT OR 35KFT ALTITUDE
030398,000357: # -TPER (-28) CS TIME TO PERIGEE
030399,000358:
030400,000359: # ERASABLE INITIALIZATION REQUIRED -
030401,000360: # TFF/RTMU (+17) EARTH RECIPROCAL OF PROPER GRAV CONSTANT FOR
030402,000361: # (+14) MOON EARTH OR MOON = 1/SQRT(MU).
030403,000362: # RONE (-29) M STATE VECTOR
030404,000363: # VONE (-7) M/CS STATE VECTOR
030405,000364: # RPADTEM (-29) M EARTH RADIUS OF LAUNCH PAD OR LUNAR LANDING
030406,000365: # (-27) M MOON SITE.
030407,000366: # HPERMIN (-29) M EARTH (300 OR 35) KFT MINIMUM PERIGEE ALTITUDE
030408,000367: # (-27) M MOON ABOVE LAUNCH PAD OR LUNAR LANDING SITE.
030409,000368: # V82EMFLG (INT SW BIT) RESET FOR EARTH, SET FOR MOON.
030410,000369:
030411,000370: # DEBRIS: QPRET, PDL, S2
030412,000371:
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Page 720
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030414,000373: 22,3551 COUNT* $$/SR30S
030415,000374:
030416,000375: 22,3551 44001 SR30.1 SETPD STQ # INITIALIZE PUSHDOWN LIST.
030417,000376: 22,3552 00001 0
030418,000377: 22,3553 00051 S2
030419,000378: # SR30.1 INPUT: RONE AT (-29)M EARTH/MOON
030420,000379: # VONE AT (-7)M/CS
030421,000380: # TFFCONMU, TFFRP/RA, CALCTPER AND CALCTFF
030422,000381: # CALLS REQUIRE:
030423,000382: # EARTH CENTERED (NO RESCALING REQUIRED)
030424,000383: # RONE SCALED TO B-29 M
030425,000384: # VONE SCALED TO B-7 M/CS
030426,000385: # MOON CENTERED (RESCALING REQUIRED)
030427,000386: # RONE SCALED TO B-27 M
030428,000387: # VONE SCALED TO B-5 M/CS
030429,000388: 22,3554 77214 BOFF VLOAD
030430,000389: 22,3555 03755 V82EMFLG # OFF FOR EARTH, ON FOR MOON.
030431,000390: 22,3556 45565 TFFCALLS
030432,000391: 22,3557 02207 RONE
030433,000392: 22,3560 77752 VSL2
030434,000393: 22,3561 26207 STOVL RONE
030435,000394: 22,3562 02215 VONE
030436,000395: 22,3563 77752 VSL2
030437,000396: 22,3564 02215 STORE VONE
030438,000397: 22,3565 77624 TFFCALLS CALL
030439,000398: 22,3566 57361 TFFCONMU
030440,000399: 22,3567 77624 CALL # TFFRP/RA COMPUTES RAPO,RPER.
030441,000400: 22,3570 57427 TFFRP/RA
030442,000401: # RETURNS WITH RAPO IN D(MPAC).
030443,000402: 22,3571 77625 DSU
030444,000403: 22,3572 02203 RPADTEM
030445,000404: 22,3573 64414 BOFF SR2R # NEED HAPO AT (-29)M FOR DISPLAY.
030446,000405: # IF MOON CENTERED, RESCALE FROM (-27)M.
030447,000406: # IF EARTH CENTERED ALREADY AT (-29)M.
030448,000407: 22,3574 03755 V82EMFLG # OFF FOR EARTH, ON FOR MOON.
030449,000408: 22,3575 45576 +1
030450,000409: 22,3576 77624 CALL # IF HAPO > MAXNM, SET HAPO =9999.9 NM.
030451,000410: 22,3577 45636 MAXCHK # OTHERWISE STORE (RAPO-RPADTEM) IN HAPO.
030452,000411: 22,3600 16120 STORHAPO STODL HAPOX
030453,000412: 22,3601 00017 RPER
030454,000413: 22,3602 77625 DSU
030455,000414: 22,3603 02203 RPADTEM # GIVES HPER AT (-29)M EARTH, (-27)M MOON.
030456,000415: 22,3604 00161 STORE MPAC +4 # SAVE THIS FOR COMPARISON TO HPERMIN.
030457,000416: 22,3605 64414 BOFF SR2R # NEED HPER AT (-29)M FOR DISPLAY.
030458,000417: # IF MOON CENTERED, RESCALE FROM (-27)M.
030459,000418: # IF EARTH CENTERED ALREADY AT (-29)M.
030460,000419: 22,3606 03755 V82EMFLG # OFF FOR EARTH, ON FOR MOON.
030461,000420: 22,3607 45610 +1
030462,000421: 22,3610 77624 CALL # IF HPER > MAXNM, SET HPER = 9999.9 NM.
030463,000422: 22,3611 45636 MAXCHK
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Page 721
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030465,000424: 22,3612 16122 STORHPER STODL HPERX # STORE (RPER - RPADTEM) INTO HPERX.
030466,000425: 22,3613 00161 MPAC +4
030467,000426: 22,3614 51025 DSU BPL # HPERMIN AT (-29)M FOR EARTH, (-27)M MOON
030468,000427: 22,3615 02201 HPERMIN # IF HPER L/ HPERMIN (300 OR 35) KFT,
030469,000428: 22,3616 45622 DOTPER # THEN ZERO INTO -TPER.
030470,000429: 22,3617 52145 DLOAD GOTO # OTHERWISE CALCULATE TPER.
030471,000430: 22,3620 06522 HI6ZEROS
030472,000431: 22,3621 45626 SKIPTPER
030473,000432: 22,3622 45145 DOTPER DLOAD CALL
030474,000433: 22,3623 00017 RPER
030475,000434: 22,3624 57465 CALCTPER
030476,000435: 22,3625 77676 DCOMP # TPER IS PUT NEG INTO -TPER.
030477,000436: 22,3626 16143 SKIPTPER STODL -TPER
030478,000437: 22,3627 02201 HPERMIN # HPERMIN AT (-29)M FOR EARTH, (-27)M MOON
030479,000438: 22,3630 45015 DAD CALL
030480,000439: 22,3631 02203 RPADTEM # RPADTEM AT (-29)M FOR EARTH, (-27)M MOON
030481,000440: 22,3632 57470 CALCTFF # GIVES 59M59S FOR TFF IF RPER G/
030482,000441: 22,3633 77676 DCOMP # HPERMIN + RPADTEM. (TPER WAS NON ZERO)
030483,000442: 22,3634 36141 STCALL TFF # OTHERWISE COMPUTES TFF. (GOTO)
030484,000443: 22,3635 00051 S2
030485,000444:
030486,000445: 22,3636 51025 MAXCHK DSU BPL # IF C(MPAC) > 9999.9 NM, MPAC = 9999.9 NM
030487,000446: 22,3637 05646 MAXNM
030488,000447: 22,3640 45643 +3 # OTHERWISE C(MPAC) = B(MPAC).
030489,000448: 22,3641 43415 DAD RVQ
030490,000449: 22,3642 05646 MAXNM
030491,000450: 22,3643 43545 +3 DLOAD RVQ # (USED BY P30 - P37 ALSO)
030492,000451: 22,3644 05646 MAXNM
030493,000452:
030494,000453: 22,3645 01065 05603 MAXNM 2OCT 0106505603
030495,000454:
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Page 722
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030498,000457:
End of include-file R30.agc. Parent file is MAIN.agc