Source Code
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These source-code files are part of a reconstructed copy of Comanche 051, the
original release of the Apollo 11 Command Module (CM) Apollo Guidance Computer
(AGC) software.
The reconstruction began with source code of Comanche 055 previously transcribed
from a digitized copy of that program. The code was then updated by undoing
changes related to the R-2 lunar potential model, using hints from program
comments and change-indicating asterisks in the Comanche 055 listing as a guide.
The reconstruction was verified by matching memory-bank checksums to those listed
in drawing 2021153D. Note that page numbers in the reconstructed code match those
on the Comanche 055 printout, although the added code would likely have changed page
numbers for a real Comanche 051 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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021880,000002: ## Copyright: Public domain.
021881,000003: ## Filename: R30.agc
021882,000004: ## Purpose: A section of Comanche revision 051.
021883,000005: ## It is part of the reconstructed source code for the
021884,000006: ## original release of the flight software for the Command
021885,000007: ## Module's (CM) Apollo Guidance Computer (AGC) for Apollo 11.
021886,000008: ## The code has been recreated from a copy of Comanche 055. It
021887,000009: ## has been adapted such that the resulting bugger words
021888,000010: ## exactly match those specified for Comanche 51 in NASA drawing
021889,000011: ## 2021153D, which gives relatively high confidence that the
021890,000012: ## reconstruction is correct.
021891,000013: ## Reference: pp. 514-524
021892,000014: ## Assembler: yaYUL
021893,000015: ## Contact: Ron Burkey <info@sandroid.org>.
021894,000016: ## Website: www.ibiblio.org/apollo/index.html
021895,000017: ## Mod history: 2019-07-30 MAS Created from Comanche 55.
021896,000018:
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Page 514
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021898,000020: # SUBROUTINE NAME: V82CALL
021899,000021: # MOD NO: 0 DATE: 16 FEB 67
021900,000022: # MOD BY: RR BAIRNSFATHER LOG SECTION: R30
021901,000023: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 11 APR 67 SR30.1 CHANGED TO ALLOW MONITOR OPERN
021902,000024: # MOD NO: 2 MOD BY ALONSO DATE: 11 DEC 67 VB82 PROGRAM REWRITTEN
021903,000025: # MOD NO: 3 MOD BY ALONSO DATE: 26 MAR 68 PROG MOD TO HANDLE DIF EARTH/MOON SCALE
021904,000026:
021905,000027: # NEW FUNCTIONAL DESCRIPTION: CALLED BY VERB 82 ENTER. PRIORITY 10
021906,000028: # USED THROUGHOUT. CALCULATE AND DISPLAY ORBITAL PARAMETERS
021907,000029:
021908,000030: # 1. IF AVERAGE G IS OFF:
021909,000031: # FLASH DISPLAY V04N06. R2 INDICATES WHICH SHIP'S STATE VECTOR IS
021910,000032: # TO BE UPDATED. INITIAL CHOICE IS THIS SHIP (R2=1). ASTRONAUT
021911,000033: # CAN CHANGE TO OTHER SHIP BY V22EXE, WHERE X NOT EQ 1.
021912,000034: # SELECTED STATE VECTOR UPDATED BY THISPREC (OTHPREC).
021913,000035: # CALLS SR30.1 (WHICH CALLS TFFCONMU + TFFRP/RA) TO CALCULATE
021914,000036: # RPER (PERIGEE RADIUS), RAPO (APOGEE RADIUS), HPER (PERIGEE
021915,000037: # HEIGHT ABOVE LAUNCH PAD OR LUNAR LANDING SITE), HAPO (APOGEE
021916,000038: # HEIGHT AS ABOVE), TPER (TIME TO PERIGEE), TFF (TIME TO
021917,000039: # INTERSECT 300 KFT ABOVE PAD OR 35KFT ABOVE LANDING SITE).
021918,000040: # FLASH MONITOR V16N44 (HAPO, HPER, TFF). TFF IS -59M59S IF IT WAS
021919,000041: # NOT COMPUTABLE, OTHERWISE IT INCREMENTS ONCE PER SECOND.
021920,000042: # ASTRONAUT HAS OPTION TO MONITOR TPER BY KEYING IN N 32 E.
021921,000043: # DISPLAY IS IN HMS, IS NEGATIVE (AS WAS TFF), AND INCREMENTS
021922,000044: # ONCE PER SECOND ONLY IF TFF DISPLAY WAS -59M59S.
021923,000045: # 2. IF AVERAGE G IS ON:
021924,000046: # CALLS SR30.1 APPROX EVERY TWO SECS. STATE VECTOR IS ALWAYS
021925,000047: # FOR THIS VEHICLE. V82 DOES NOT DISTURB STATE VECTOR. RESULTS
021926,000048: # OF SR30.1 ARE RAPO, RPER, HAPO, HPER, TPER, TFF.
021927,000049: # FLASH MONITOR V16N44 (HAPO, HPER, TFF).
021928,000050: # IF MODE IS P11, THEN CALL DELRSPL SO ASTRONAUT CAN MONITOR
021929,000051: # RESULTS BY N50E. SPLASH COMPUTATION DONE ONCE PER TWO SECS.
021930,000052: # ADDENDUM: HAPO AND HPER SHOULD BE CHANGED TO READ HAPOX AND HPERX IN THE
021931,000053: # ABOVE REMARKS.
021932,000054:
021933,000055: # CALLING SEQUENCE: VERB 82 ENTER.
021934,000056:
021935,000057: # SUBROUTINES CALLED: SR30.1, GOXDSPF
021936,000058: # MAYBE - THISPREC, OTHPREC, LOADTIME, DELRSPL
021937,000059:
021938,000060: # NORMAL EXIT MODES: TC ENDEXT
021939,000061:
021940,000062: # ALARMS: NONE
021941,000063:
021942,000064: # OUTPUT: HAPOX (-29) M
021943,000065: # HPERX (-29) M
021944,000066: # RAPO (-29) M EARTH
021945,000067: # (-27) M MOON
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Page 515
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021947,000069: # RPER (-29) M EARTH
021948,000070: # (-27) M MOON
021949,000071: # TFF (-28) CS CONTAINS NEGATIVE QUANTITY
021950,000072: # -TPER (-28) CS CONTAINS NEGATIVE QUANTITY
021951,000073: # RSP-RREC(-29) M IF DELRSPL CALLED
021952,000074:
021953,000075: # ERASABLE INITIALIZATION REQUIRED: STATE VECTOR.
021954,000076:
021955,000077: # DEBRIS: QPRET, RONE, VONE, TFF/RTMU, HPERMIN, RPADTEM, V82EMFLG.
021956,000078: # MAYBE: TSTART82, V82FLAGS, TDEC1.
021957,000079:
021958,000080: 13,2231 E4,1751 EBANK= HAPOX
021959,000081: 31,2332 BANK 31
021960,000082: 23,2000 SETLOC R30LOC
021961,000083: 23,2000 BANK
021962,000084: 23,2332 COUNT* $$/R30
021963,000085:
021964,000086: 23,2332 06006 V82CALL TC INTPRET
021965,000087: 23,2333 52014 BON GOTO
021966,000088: 23,2334 00716 AVEGFLAG
021967,000089: 23,2335 46566 V82GON # IF AVERAGE G ON
021968,000090: 23,2336 46337 V82GOFF # IF AVERAGE G OFF
021969,000091:
021970,000092: 23,2337 77776 V82GOFF EXIT # ALLOW ASTRONAUT TO SELECT VEHICLE
021971,000093: 23,2340 35016 CAF TWO # DESIRED FOR ORBITAL PARAMETERS
021972,000094: 23,2341 55051 TS OPTIONX
021973,000095: 23,2342 35017 CAF ONE
021974,000096: 23,2343 55052 TS OPTIONX +1
021975,000097: 23,2344 32406 CAF OPTIONVN # V 04 N 06
021976,000098: 23,2345 04662 TC BANKCALL
021977,000099: 23,2346 20561 CADR GOXDSPF
021978,000100: 23,2347 05534 TC ENDEXT # TERMINATE
021979,000101: 23,2350 02352 TC +2 # PROCEED
021980,000102: 23,2351 02344 TC -5 # DATA IN. OPTIONX +1 = 1 FOR THIS VEHIC.
021981,000103: # UNEQ 1 FOR OTHER VEHICLE.
021982,000104: 23,2352 35014 CAF BIT4 # 80 MS
021983,000105: 23,2353 05245 TC WAITLIST
021984,000106: 23,2354 E4,1743 EBANK= TFF
021985,000107: 23,2354 02531 46064 2CADR TICKTEST
021986,000108:
021987,000109: 23,2356 00003 RELINT
021988,000110: 23,2357 32410 V82GOFLP CAF TFFBANK # MAJOR RECYCLE LOOP ENTRY
021989,000111: 23,2360 54003 TS EBANK
021990,000112: 23,2361 35021 CAF ZERO
021991,000113: 23,2362 55742 TS V82FLAGS # ZERO FLAGS FOR TICKTEST. INHIBITS
021992,000114: # DECREMENTING OF TFF AND -TPER.
021993,000115: 23,2363 35063 CAF PRIO7
021994,000116: 23,2364 05147 TC FINDVAC # V82GOFF1 WILL EXECUTE STATE VECTOR
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Page 516
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021996,000118: 23,2365 E4,1743 EBANK= TFF # UPDATE AND ORBIT CALCULATIONS FOR
021997,000119: 23,2365 02411 46064 2CADR V82GOFF1 # SELECTED VEHICLE ABOUT PROPER BODY.
021998,000120:
021999,000121: 23,2367 00003 RELINT
022000,000122: 23,2370 36214 V82STALL CAF THREE # STALL IN THIS LOOP AND WITHOLD V 16 N 44
022001,000123: 23,2371 71742 MASK V82FLAGS # UNTIL STATE VECTOR UPDATE SETS ONE OF
022002,000124: 23,2372 10000 CCS A # OUR FLAG BITS.
022003,000125: 23,2373 02400 TC FLAGGON # EXIT FROM STALL LOOP.
022004,000126: 23,2374 35041 CAF 1SEC
022005,000127: 23,2375 04662 TC BANKCALL
022006,000128: 23,2376 01732 CADR DELAYJOB
022007,000129: 23,2377 02370 TC V82STALL
022008,000130:
022009,000131: 23,2400 32407 FLAGGON CAF V16N44 # MONITOR HAPO,HPER,TFF.
022010,000132: 23,2401 04662 TC BANKCALL
022011,000133: 23,2402 20561 CADR GOXDSPF
022012,000134: 23,2403 05625 TC B5OFF # TERM THIS TELLS TICKTEST TO KILL ITSELF
022013,000135: 23,2404 05625 TC B5OFF # PROCEED DITTO
022014,000136: 23,2405 02357 TC V82GOFLP # RECYCLE RECOMPUTE STATE VECT + DISPLAY
022015,000137:
022016,000138: 23,2406 01014 OPTIONVN VN 0412
022017,000139: 23,2407 04054 V16N44 VN 1644
022018,000140: 23,2410 02343 TFFBANK ECADR TFF
022019,000141:
022020,000142: 23,2411 06006 V82GOFF1 TC INTPRET
022021,000143: 23,2412 77634 RTB
022022,000144: 23,2413 45510 LOADTIME
022023,000145: 23,2414 00041 STORE TDEC1 # TIME FOR STATE VECTOR UPDATE.
022024,000146: 23,2415 02325 STORE TSTART82 # TIME FOR INTERNAL USE.
022025,000147: 23,2416 77776 EXIT
022026,000148: 23,2417 41052 CS OPTIONX +1 # 1 FOR THIS VEHICLE, NOT 1 FOR OTHER
022027,000149: 23,2420 65017 AD ONE
022028,000150: 23,2421 00006 EXTEND
022029,000151: 23,2422 12446 BZF THISSHIP
022030,000152: 23,2423 06006 OTHSHIP TC INTPRET
022031,000153: 23,2424 77624 CALL # CALL STATE VECTOR UPDATE FOR OTHER SHIP.
022032,000154: 23,2425 27105 OTHPREC
022033,000155: 23,2426 77775 BOTHSHIP VLOAD # MOVE RESULTS INTO TFFCONIC STORAGE AREAS
022034,000156: 23,2427 00001 RATT # TO BE CALLED BY SR30.1.
022035,000157: 23,2430 26327 STOVL RONE # RATT AT (-29)M FOR EARTH OR MOON
022036,000158: 23,2431 00007 VATT
022037,000159: 23,2432 02335 STORE VONE # VATT AT (-7)M/CS FOR EARTH OR MOON
022038,000160: 23,2433 77743 DLOAD*
022039,000161: 23,2434 71321 1/RTMUE,2 # X2 IS 0 FOR EARTH CENTERED STATE VEC
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HG remark: In Comanche055 scan this line (5324) looks pretty much like 1/RTMUF.2 can not decide, leave it
as it is in start source.
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022042,000164: 23,2435 00037 STORE TFF/RTMU # X2 IS 2 FOR MOON
022043,000165: 23,2436 77743 DLOAD* # AS LEFT BY THISPREC OR OTHPREC.
022044,000166: 23,2437 71315 MINPERE,2
022045,000167: 23,2440 02321 STORE HPERMIN # TFFRTMU, HPERMIN AND RPADTEM ARE ALL
022046,000168: 23,2441 46135 SLOAD BHIZ # EARTH/MOON PARAMETERS AS SET HERE.
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Page 517
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022048,000170: 23,2442 00050 X2
022049,000171: 23,2443 46463 EARTHPAD
022050,000172: 23,2444 77650 GOTO
022051,000173: 23,2445 46467 MOONPAD
022052,000174: 23,2446 06006 THISSHIP TC INTPRET
022053,000175: 23,2447 77624 CALL # CALL STATE VECTOR UPDATE FOR THIS SHIP.
022054,000176: 23,2450 27071 THISPREC
022055,000177: 23,2451 77650 GOTO
022056,000178: 23,2452 46426 BOTHSHIP
022057,000179:
022058,000180: # THE FOLLOWING CONSTANTS ARE PAIRWISE INDEXED. DO NOT SEPARATE PAIRS.
022059,000181:
022060,000182: 23,2453 27533 07571 1/RTMUM 2DEC* .45162595 E-4 B14*
022061,000183: 23,2455 25004 06702 1/RTMUE 2DEC* .50087529 E-5 B17*
022062,000184:
022063,000185: 23,2457 00001 11530 MINPERM 2DEC 10668 B-27 # 35 KFT MIN PERIGEE HEIGHT FOR MOON(-27)M
022064,000186: 23,2461 00002 31230 MINPERE 2DEC 91440 B-29 # 300 KFT (-29)M FOR EARTH
022065,000187:
022066,000188: 23,2463 43145 EARTHPAD DLOAD CLRGO # PAD 37-B RADIUS. SCALED AT (-29)M.
022067,000189: 23,2464 05152 RPAD
022068,000190: 23,2465 04622 V82EMFLG # INDICATE EARTH SCALING FOR SR30.1
022069,000191: 23,2466 46473 BOTHPAD
022070,000192:
022071,000193: 23,2467 51575 MOONPAD VLOAD ABVAL # COMPUTE MOON PAD RADIUS FROM RLS VECTOR.
022072,000194: 23,2470 02026 RLS # SCALED AT (-27)M.
022073,000195: 23,2471 77614 SET
022074,000196: 23,2472 04462 V82EMFLG # INDICATE MOON SCALING FOR SR30.1
022075,000197: 23,2473 36323 BOTHPAD STCALL RPADTEM
022076,000198: 23,2474 46667 SR30.1 # CALCULATE ORBITAL PARAMETERS
022077,000199: 23,2475 77776 EXIT
022078,000200: 23,2476 31011 CA MODREG # ARE WE IN POO
022079,000201: 23,2477 00006 EXTEND
022080,000202: 23,2500 12645 BZF CANDEL # YES, DO DELRSPL
022081,000203: 23,2501 06006 SPLRET1 TC INTPRET
022082,000204: 23,2502 45234 RTB DSU
022083,000205: 23,2503 45510 LOADTIME
022084,000206: 23,2504 02325 TSTART82 # PRESENT TIME - TIME V82GOFF1 BEGAN
022085,000207: 23,2505 02325 STORE TSTART82 # SAVE IT
022086,000208: 23,2506 53145 DLOAD BZE # SR30.1 SETS -TPER=0 IF HPER L/
022087,000209: 23,2507 02346 -TPER # HPERMIN (300 OR 35) KFT.
022088,000210: 23,2510 46521 TICKTFF # (-TPER = 0)
022089,000211: 23,2511 43345 TICKTPER DLOAD DAD # (-TPER NON ZERO) TFF WAS NOT COMPUTED,
022090,000212: 23,2512 02346 -TPER # BUT WAS SET TO 59M59S. DONT TICK TFF, DO
022091,000213: 23,2513 02325 TSTART82 # TICK -TPER. DISPLAY BOTH.
022092,000214: 23,2514 02346 STORE -TPER # -TPER CORRECTED FOR TIME SINCE V82GOFF1
022093,000215: 23,2515 77776 EXIT # BEGAN.
022094,000216:
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Page 518
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022096,000218: 23,2516 35017 CAF BIT1
022097,000219: 23,2517 55742 TS V82FLAGS # INFORMS TICKTEST TO INCREMENT ONLY -TPER
022098,000220: 23,2520 05217 TC ENDOFJOB
022099,000221:
022100,000222: 23,2521 43345 TICKTFF DLOAD DAD # (-TPER=0) TFF WAS COMPUTED. TICK TFF.
022101,000223: 23,2522 02344 TFF # DO NOT TICK -TPER. DISPLAY TFF, BUT NOT
022102,000224: 23,2523 02325 TSTART82 # -TPER.
022103,000225: 23,2524 02344 STORE TFF # TFF CORRECTED FOR TIME SINCE V82GOFF1
022104,000226: 23,2525 77776 EXIT # BEGAN.
022105,000227: 23,2526 35016 CAF BIT2
022106,000228: 23,2527 55742 TS V82FLAGS # INFORMS TICKTEST TO INCREMENT ONLY TFF.
022107,000229: 23,2530 05217 TC ENDOFJOB
022108,000230:
022109,000231: 23,2531 35013 TICKTEST CAF BIT5 # THIS WAITLIST PROGRAM PERPETUATES ITSELF
022110,000232: 23,2532 71044 MASK EXTVBACT # ONCE A SEC UNTIL BIT 5 OF EXTVBACT =0.
022111,000233: 23,2533 10000 CCS A
022112,000234: 23,2534 02542 TC DOTICK
022113,000235: 23,2535 37662 CAF PRIO25
022114,000236: 23,2536 05134 TC NOVAC # TERMINATE V 82. CANT CALL ENDEXT IN RUPT.
022115,000237: 23,2537 1044 EBANK= EXTVBACT
022116,000238: 23,2537 05534 04062 2CADR ENDEXT
022117,000239:
022118,000240: 23,2541 05324 TC TASKOVER
022119,000241: 23,2542 35041 DOTICK CAF 1SEC # RE-REQUEST TICKTEST.
022120,000242: 23,2543 05245 TC WAITLIST
022121,000243: 23,2544 E4,1743 EBANK= TFF
022122,000244: 23,2544 02531 46064 2CADR TICKTEST
022123,000245:
022124,000246: 23,2546 36214 CAF THREE
022125,000247: 23,2547 71742 MASK V82FLAGS
022126,000248: 23,2550 50000 INDEX A
022127,000249: 23,2551 02552 TC +1
022128,000250: 23,2552 05324 TC TASKOVER # IF NO FLAGBITS SET DONT CHANGE TFF OR
022129,000251: # -TPER, BUT CONTINUE LOOP.
022130,000252: 23,2553 02561 TC TPERTICK # ONLY BIT 1 SET. INCR -TPER BY 1 SEC.
022131,000253: 23,2554 35041 TFFTICK CAF 1SEC # ONLY BIT 2 SET. INCR TFF BY 1 SEC.
022132,000254: 23,2555 54001 TS L
022133,000255: 23,2556 35021 CAF ZERO
022134,000256: 23,2557 21744 DAS TFF
022135,000257: 23,2560 05324 TC TASKOVER
022136,000258: 23,2561 35041 TPERTICK CAF 1SEC
022137,000259: 23,2562 54001 TS L
022138,000260: 23,2563 35021 CAF ZERO
022139,000261: 23,2564 21746 DAS -TPER
022140,000262: 23,2565 05324 TC TASKOVER
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Page 519
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022142,000264: 23,2566 77776 V82GON EXIT # AVERAGE G ON. USE CURRENT STATE VECTOR
022143,000265: # FOR ORBITAL PARAMETER CALCULATIONS.
022144,000266: 23,2567 35063 CAF PRIO7 # LESS THAN LAMBERT
022145,000267: 23,2570 05147 TC FINDVAC # V82GON1 WILL PERFORM ORBIT CALCULATIONS
022146,000268: 23,2571 E4,1743 EBANK= TFF # ABOUT PROPER BODY APPROX ONCE PER SEC.
022147,000269: 23,2571 02604 46064 2CADR V82GON1
022148,000270:
022149,000271: 23,2573 00003 RELINT
022150,000272: 23,2574 10067 CCS NEWJOB # WITHOLD V16 N44 UNTIL FIRST ORBIT CALC
022151,000273: 23,2575 05164 TC CHANG1 # IS DONE. NOTE: V82GON1 (PRIO7, FINDVAC
022152,000274: # JOB) IS COMPLETED BEFORE V82GON (PRIO7,
022153,000275: # NOVAC JOB).
022154,000276: 23,2576 32407 V82REDSP CAF V16N44 # MONITOR HAPO, HPER, TFF
022155,000277: 23,2577 04662 TC BANKCALL
022156,000278: 23,2600 20561 CADR GOXDSPF
022157,000279: 23,2601 05625 TC B5OFF # TERM THIS TELLS V82GON1 TO KILL ITSELF.
022158,000280: 23,2602 05625 TC B5OFF # PROC DITTO.
022159,000281: 23,2603 02576 TC V82REDSP # RECYCLE
022160,000282:
022161,000283: 23,2604 06006 V82GON1 TC INTPRET # THIS EXEC PROGRAM PERPETUATES ITSELF
022162,000284: # ONCE A SEC UNTIL BIT 5 OF EXTVBACT =0.
022163,000285: 23,2605 52175 VLOAD GOTO # HOLDS OFF CCS NEWJOB BETWEEN RN AND
022164,000286: 23,2606 01171 RN # VN FETCH SO RN, VN ARE FROM SAME
022165,000287: 23,2607 46610 NEXTLINE # STATE VECTOR UPDATE.
022166,000288: 23,2610 26327 NEXTLINE STOVL RONE # RN AT (-29)M FOR EARTH OR MOON
022167,000289: 23,2611 01177 VN
022168,000290: 23,2612 02335 STORE VONE # VN AT (-7)M/CS FOR EARTH OR MOON
022169,000291: 23,2613 52014 BON GOTO
022170,000292: 23,2614 00315 AMOONFLG # FLAG INDICATES BODY ABOUT WHICH ORBITAL
022171,000293: 23,2615 46617 MOONGON # CALCULATIONS ARE TO BE PERFORMED.
022172,000294: 23,2616 46630 EARTHGON # IF SET - MOON, IF RESET - EARTH.
022173,000295:
022174,000296: 23,2617 71214 MOONGON SET DLOAD
022175,000297: 23,2620 04462 V82EMFLG # INDICATE MOON SCALING FOR SR30.1
022176,000298: 23,2621 06454 1/RTMUM # LUNAR PARAMETERS LOADED HERE FOR SR30.1
022177,000299: 23,2622 14037 STODL TFF/RTMU
022178,000300: 23,2623 06460 MINPERM
022179,000301: 23,2624 26321 STOVL HPERMIN
022180,000302: 23,2625 02026 RLS # SCALED AT (-27)M.
022181,000303: 23,2626 52046 ABVAL GOTO
022182,000304: 23,2627 46637 V82GON2
022183,000305: 23,2630 71214 EARTHGON CLEAR DLOAD
022184,000306: 23,2631 04662 V82EMFLG # INDICATE EARTH SCALING FOR SR30.1
022185,000307: 23,2632 06456 1/RTMUE # EARTH PARAMETERS LOADED HERE FOR SR30.1
022186,000308: 23,2633 14037 STODL TFF/RTMU
022187,000309: 23,2634 06462 MINPERE
022188,000310: 23,2635 16321 STODL HPERMIN
022189,000311: 23,2636 05152 RPAD
022190,000312: 23,2637 36323 V82GON2 STCALL RPADTEM # COMMON CODE FOR EARTH & MOON.
022191,000313: 23,2640 46667 SR30.1
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Page 520
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022193,000315: 23,2641 77776 EXIT
022194,000316: 23,2642 05364 TC CHECKMM
022195,000317: 23,2643 00013 DEC 11 B-14
022196,000318: 23,2644 02657 TC V82GON3 # NOT IN MODE 11.
022197,000319: 23,2645 06006 CANDEL TC INTPRET # IN MODE 11 OR 00
022198,000320: 23,2646 77624 CALL
022199,000321: 23,2647 27442 INTSTALL # DELRSPL DOES INTWAKE
022200,000322: 23,2650 45145 DLOAD CALL
022201,000323: 23,2651 02344 TFF
022202,000324: 23,2652 64017 DELRSPL # RETURN IS TO NEXT LINE (SPLRET).
022203,000325: 23,2653 77776 SPLRET EXIT
022204,000326:
022205,000327: 23,2654 31011 CA MODREG
022206,000328: 23,2655 00006 EXTEND
022207,000329: 23,2656 12501 BZF SPLRET1
022208,000330: 23,2657 35013 V82GON3 CAF BIT5
022209,000331: 23,2660 71044 MASK EXTVBACT # SEE IF ASTRONAUT HAS SIGNALLED TERMINATE
022210,000332: 23,2661 00006 EXTEND
022211,000333: 23,2662 15534 BZF ENDEXT # YES, TERMINATE VB 82 LOOP
022212,000334: 23,2663 35041 CAF 1SEC
022213,000335: 23,2664 04662 TC BANKCALL # WAIT ONE SECOND BEFORE REPEATING
022214,000336: 23,2665 01732 CADR DELAYJOB # ORBITAL PARAMETER COMPUTATION.
022215,000337: 23,2666 02604 TC V82GON1
022216,000338:
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Page 521
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022218,000340: # SUBROUTINE NAME: SR30.1
022219,000341: # MOD NO: 0 DATE: 16 FEB 67
022220,000342: # MOD BY: RR BAIRNSFATHER LOG SECTION: R32
022221,000343: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 11 APR 67 SR30.1 CHANGED TO ALLOW MONITOR OPERN
022222,000344: # MOD NO: 2 MOD BY: RR BAIRNSFATHER DATE: 14 APR 67 ADD OVFL CK FOR RAPO
022223,000345: # MOD NO: 3 MOD BY ALONSO DATE: 11 DEC 67 SUBROUTINE REWRITTEN
022224,000346: # MOD NO: 4 MOD BY ALONSO DATE: 26 MAR 68 PROG MOD TO HANDLE DIF EARTH/MOON SCALE
022225,000347: # MOD NO: 5 MOD BY: RR BAIRNSFATHER DATE: 6 AUG 68 OVFL CK FOR HAPO & HPER. VOIDS MOD #2.
022226,000348:
022227,000349: # NEW FUNCTIONAL DESCRIPTION: ORBITAL PARAMETERS DISPLAY FOR NOUNS 32 AND 44.
022228,000350: # SR30.1 CALLS TFFCONMU AND TFFRP/RA TO CALCULATE RPER (PERIGEE RADIUS),
022229,000351: # RAPO (APOGEE RADIUS), HPER (PERIGEE HEIGHT ABOVE LAUNCH PAD OR LUNAR
022230,000352: # LANDING SITE), HAPO (APOGEE HEIGHT AS ABOVE), TPER (TIME TO PERIGEE),
022231,000353: # TFF (TIME TO INTERSECT 300 KFT ABOVE PAD OR 35KFT ABOVE LANDING SITE).
022232,000354: # IF HPER IS GREATER THAN OR EQUAL TO HPERMIN, CALCULATES TPER AND STORES
022233,000355: # NEGATIVE IN -TPER. OTHERWISE STORES +0 IN -TPER. WHENEVER TPER IS
022234,000356: # CALCULATED, TFF IS NOT COMPUTABLE AND DEFAULTS TO -59MIN 59SEC. IF HAPO
022235,000357: # WOULD EXCEED 9999.9 NM, IT IS LIMITED TO THAT VALUE FOR DISPLAY.
022236,000358:
022237,000359: # ADDENDUM: HAPO AND HPER SHOULD BE CHANGED TO READ HAPOX AND HPERX IN THE
022238,000360: # ABOVE REMARKS.
022239,000361:
022240,000362: # CALLING SEQUENCE: CALL
022241,000363: # SR30.1
022242,000364:
022243,000365: # SUBROUTINES CALLED: TFFCONMU, TFFRP/RA, CALCTPER, CALCTFF
022244,000366:
022245,000367: # NORMAL EXIT MODE: CALLING LINE +1 (STILL IN INTERPRETIVE MODE)
022246,000368:
022247,000369: # ALARMS: NONE
022248,000370:
022249,000371: # OUTPUT: RAPO (-29) M EARTH APOGEE RADIUS EARTH CENTERED COORD.
022250,000372: # (-27) M MOON MOON CENTERED COORD.
022251,000373: # RPER (-29) M EARTH PERIGEE RADIUS EARTH CENTERED COORD.
022252,000374: # (-27) M MOON MOON CENTERED COORD.
022253,000375: # HAPOX (-29) M APOGEE ALTITUDE ABOVE PAD OR LAND. SITE MAX VALUE LIMITED TO 9999.9 NM.
022254,000376: # HPERX (-29) M PERIGEE ALT. ABOVE PAD OR LAND. SITE MAX VALUE LIMITED TO 9999.9 NM.
022255,000377: # TFF (-28) CS TIME TO 300KFT OR 35KFT ALTITUDE
022256,000378: # -TPER (-28) CS TIME TO PERIGEE
022257,000379:
022258,000380: # ERASABLE INITIALIZATION REQUIRED -
022259,000381: # TFF/RTMU (+17) EARTH RECIPROCAL OF PROPER GRAV CONSTANT FOR
022260,000382: # (+14) MOON EARTH OR MOON = 1/SQRT(MU).
022261,000383: # RONE (-29) M STATE VECTOR
022262,000384: # VONE (-7) M/CS STATE VECTOR
022263,000385: # RPADTEM (-29) M EARTH RADIUS OF LAUNCH PAD OR LUNAR LANDING
022264,000386: # (-27) M MOON SITE.
022265,000387: # HPERMIN (-29) M EARTH (300 OR 35) KFT MINIMUM PERIGEE ALTITUDE
022266,000388: # (-27) M MOON ABOVE LAUNCH PAD OR LUNAR LANDING SITE.
022267,000389: # V82EMFLG (INT SW BIT) RESET FOR EARTH, SET FOR MOON.
022268,000390:
022269,000391: # DEBRIS: QPRET, PDL, S2
022270,000392:
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Page 522
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022272,000394: 23,2667 COUNT* $$/SR30S
022273,000395:
022274,000396: 23,2667 44001 SR30.1 SETPD STQ # INITIALIZE PUSHDOWN LIST.
022275,000397: 23,2670 00001 0
022276,000398: 23,2671 00051 S2
022277,000399: # SR30.1 INPUT: RONE AT (-29)M EARTH/MOON
022278,000400: # VONE AT (-7)M/CS
022279,000401: # TFFCONMU, TFFRP/RA, CALCTPER AND CALCTFF
022280,000402: # CALLS REQUIRE:
022281,000403: # EARTH CENTERED (NO RESCALING REQUIRED)
022282,000404: # RONE SCALED TO B-29 M
022283,000405: # VONE SCALED TO B-7 M/CS
022284,000406: # MOON CENTERED (RESCALING REQUIRED)
022285,000407: # RONE SCALED TO B-27 M
022286,000408: # VONE SCALED TO B-5 M/CS
022287,000409: 23,2672 77214 BOFF VLOAD
022288,000410: 23,2673 04742 V82EMFLG # OFF FOR EARTH, ON FOR MOON.
022289,000411: 23,2674 46703 TFFCALLS
022290,000412: 23,2675 02327 RONE
022291,000413: 23,2676 77752 VSL2
022292,000414: 23,2677 26327 STOVL RONE
022293,000415: 23,2700 02335 VONE
022294,000416: 23,2701 77752 VSL2
022295,000417: 23,2702 02335 STORE VONE
022296,000418: 23,2703 77624 TFFCALLS CALL
022297,000419: 23,2704 56760 TFFCONMU
022298,000420: 23,2705 77624 CALL # TFFRP/RA COMPUTES RAPO,RPER.
022299,000421: 23,2706 57026 TFFRP/RA
022300,000422: # RETURNS WITH RAPO IN D(MPAC).
022301,000423: 23,2707 77625 DSU
022302,000424: 23,2710 02323 RPADTEM
022303,000425: 23,2711 64414 BOFF SR2R # NEED HAPO AT (-29)M FOR DISPLAY.
022304,000426: # IF MOON CENTERED, RESCALE FROM (-27)M.
022305,000427: # IF EARTH CENTERED ALREADY AT (-29)M.
022306,000428: 23,2712 04742 V82EMFLG # OFF FOR EARTH, ON FOR MOON.
022307,000429: 23,2713 46714 +1
022308,000430: 23,2714 77624 CALL # IF HAPO > MAXNM, SET HAPO =9999.9 NM.
022309,000431: 23,2715 46754 MAXCHK # OTHERWISE STORE (RAPO-RPADTEM) IN HAPO.
022310,000432: 23,2716 16352 STORHAPO STODL HAPOX
022311,000433: 23,2717 00017 RPER
022312,000434: 23,2720 77625 DSU
022313,000435: 23,2721 02323 RPADTEM # GIVES HPER AT (-29)M EARTH, (-27)M MOON.
022314,000436: 23,2722 00161 STORE MPAC +4 # SAVE THIS FOR COMPARISON TO HPERMIN.
022315,000437: 23,2723 64414 BOFF SR2R # NEED HPER AT (-29)M FOR DISPLAY.
022316,000438: # IF MOON CENTERED, RESCALE FROM (-27)M.
022317,000439: # IF EARTH CENTERED ALREADY AT (-29)M.
022318,000440: 23,2724 04742 V82EMFLG # OFF FOR EARTH, ON FOR MOON.
022319,000441: 23,2725 46726 +1
022320,000442: 23,2726 77624 CALL # IF HPER > MAXNM, SET HPER = 9999.9 NM.
022321,000443: 23,2727 46754 MAXCHK
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022323,000445: 23,2730 16354 STORHPER STODL HPERX # STORE (RPER - RPADTEM) INTO HPERX.
022324,000446: 23,2731 00161 MPAC +4
022325,000447: 23,2732 51025 DSU BPL # HPERMIN AT (-29)M FOR EARTH, (-27)M MOON
022326,000448: 23,2733 02321 HPERMIN # IF HPER L/ HPERMIN (300 OR 35) KFT,
022327,000449: 23,2734 46740 DOTPER # THEN ZERO INTO -TPER.
022328,000450: 23,2735 52145 DLOAD GOTO # OTHERWISE CALCULATE TPER.
022329,000451: 23,2736 15335 HI6ZEROS
022330,000452: 23,2737 46744 SKIPTPER
022331,000453: 23,2740 45145 DOTPER DLOAD CALL
022332,000454: 23,2741 00017 RPER
022333,000455: 23,2742 57064 CALCTPER
022334,000456: 23,2743 77676 DCOMP # TPER IS PUT NEG INTO -TPER.
022335,000457: 23,2744 16346 SKIPTPER STODL -TPER
022336,000458: 23,2745 02321 HPERMIN # HPERMIN AT (-29)M FOR EARTH, (-27)M MOON
022337,000459: 23,2746 45015 DAD CALL
022338,000460: 23,2747 02323 RPADTEM # RPADTEM AT (-29)M FOR EARTH, (-27)M MOON
022339,000461: 23,2750 57067 CALCTFF # GIVES 59M59S FOR TFF IF RPER G/
022340,000462: 23,2751 77676 DCOMP # HPERMIN + RPADTEM. (TPER WAS NON ZERO)
022341,000463: 23,2752 36344 STCALL TFF # OTHERWISE COMPUTES TFF. (GOTO)
022342,000464: 23,2753 00051 S2
022343,000465:
022344,000466: 23,2754 51025 MAXCHK DSU BPL # IF C(MPAC) > 9999.9 NM, MPAC = 9999.9 NM
022345,000467: 23,2755 06764 MAXNM
022346,000468: 23,2756 46761 +3 # OTHERWISE C(MPAC) = B(MPAC).
022347,000469: 23,2757 43415 DAD RVQ
022348,000470: 23,2760 06764 MAXNM
022349,000471: 23,2761 43545 +3 DLOAD RVQ # (USED BY P30 - P37 ALSO)
022350,000472: 23,2762 06764 MAXNM
022351,000473:
022352,000474: 23,2763 01065 05603 MAXNM 2OCT 0106505603
022353,000475:
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Page 524
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022355,000477:
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There is no source code on this page — HG 2009
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End of include-file R30.agc. Parent file is MAIN.agc