Source Code
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These source-code files are part of a reconstructed copy of Comanche 45/2 (AKA Manche45 revision 2),
the final, flown mission release of the Apollo 10 Command Module (CM) Apollo Guidance
Computer (AGC) software. Comanche 45/2 was preceded by Comanche 44 and Comanche 45. The
reconstruction is believed to be exactly accurate, but in the absence of an actual Apollo-era
listing of Comanche 45/2, some explanation of the reconstruction process is needed
to insure confidence in that accuracy.
The starting point was the source code of Comanche 45 (itself previously accurately
reconstructed). Comanche 45 source code was then modified by incorporating changes
known from contemporary documentation to have been made between revisions 45 and 45/2.
The now-reconstructed Comanche 45/2 source code was
verified by assembling it and checking that the assembled code had
the expected known-correct memory-bank checksums.
Note that page numbers in the reconstructed code tend to match those in the Comanche 55, the
most-similar revision of Comanche for which we have access to an actual non-reconstructed hardcopy;
the source code would likely have different page numbers in a contemporary
Comanche 45 listing.
Annotations that were not present in the contemporary source code have been added to the reconstructed
code to justify each change relative to Comanche 44. Here's a guide to the Apollo documentation referenced
in those annotations:
Comments expected to have been present in 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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021891,000002: ## Copyright: Public domain.
021892,000003: ## Filename: R30.agc
021893,000004: ## Purpose: A section of Manche45 revision 2.
021894,000005: ## It is part of the reconstructed source code for the
021895,000006: ## final, flown release of the flight software for the Command
021896,000007: ## Module's (CM) Apollo Guidance Computer (AGC) for Apollo 10.
021897,000008: ## The code has been recreated from a copy of Comanche 055. It
021898,000009: ## has been adapted such that the resulting bugger words
021899,000010: ## exactly match those specified for Manche 45/2 in NASA drawing
021900,000011: ## 2021153D, which gives relatively high confidence that the
021901,000012: ## reconstruction is correct.
021902,000013: ## Assembler: yaYUL
021903,000014: ## Contact: Ron Burkey <info@sandroid.org>.
021904,000015: ## Website: www.ibiblio.org/apollo/index.html
021905,000016: ## Mod history: 2020-12-24 MAS Created from Comanche 45.
021906,000017:
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Page 514
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021908,000019: # SUBROUTINE NAME: V82CALL
021909,000020: # MOD NO: 0 DATE: 16 FEB 67
021910,000021: # MOD BY: RR BAIRNSFATHER LOG SECTION: R30
021911,000022: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 11 APR 67 SR30.1 CHANGED TO ALLOW MONITOR OPERN
021912,000023: # MOD NO: 2 MOD BY ALONSO DATE: 11 DEC 67 VB82 PROGRAM REWRITTEN
021913,000024: # MOD NO: 3 MOD BY ALONSO DATE: 26 MAR 68 PROG MOD TO HANDLE DIF EARTH/MOON SCALE
021914,000025:
021915,000026: # NEW FUNCTIONAL DESCRIPTION: CALLED BY VERB 82 ENTER. PRIORITY 10
021916,000027: # USED THROUGHOUT. CALCULATE AND DISPLAY ORBITAL PARAMETERS
021917,000028:
021918,000029: # 1. IF AVERAGE G IS OFF:
021919,000030: # FLASH DISPLAY V04N06. R2 INDICATES WHICH SHIP'S STATE VECTOR IS
021920,000031: # TO BE UPDATED. INITIAL CHOICE IS THIS SHIP (R2=1). ASTRONAUT
021921,000032: # CAN CHANGE TO OTHER SHIP BY V22EXE, WHERE X NOT EQ 1.
021922,000033: # SELECTED STATE VECTOR UPDATED BY THISPREC (OTHPREC).
021923,000034: # CALLS SR30.1 (WHICH CALLS TFFCONMU + TFFRP/RA) TO CALCULATE
021924,000035: # RPER (PERIGEE RADIUS), RAPO (APOGEE RADIUS), HPER (PERIGEE
021925,000036: # HEIGHT ABOVE LAUNCH PAD OR LUNAR LANDING SITE), HAPO (APOGEE
021926,000037: # HEIGHT AS ABOVE), TPER (TIME TO PERIGEE), TFF (TIME TO
021927,000038: # INTERSECT 300 KFT ABOVE PAD OR 35KFT ABOVE LANDING SITE).
021928,000039: # FLASH MONITOR V16N44 (HAPO, HPER, TFF). TFF IS -59M59S IF IT WAS
021929,000040: # NOT COMPUTABLE, OTHERWISE IT INCREMENTS ONCE PER SECOND.
021930,000041: # ASTRONAUT HAS OPTION TO MONITOR TPER BY KEYING IN N 32 E.
021931,000042: # DISPLAY IS IN HMS, IS NEGATIVE (AS WAS TFF), AND INCREMENTS
021932,000043: # ONCE PER SECOND ONLY IF TFF DISPLAY WAS -59M59S.
021933,000044: # 2. IF AVERAGE G IS ON:
021934,000045: # CALLS SR30.1 APPROX EVERY TWO SECS. STATE VECTOR IS ALWAYS
021935,000046: # FOR THIS VEHICLE. V82 DOES NOT DISTURB STATE VECTOR. RESULTS
021936,000047: # OF SR30.1 ARE RAPO, RPER, HAPO, HPER, TPER, TFF.
021937,000048: # FLASH MONITOR V16N44 (HAPO, HPER, TFF).
021938,000049: # IF MODE IS P11, THEN CALL DELRSPL SO ASTRONAUT CAN MONITOR
021939,000050: # RESULTS BY N50E. SPLASH COMPUTATION DONE ONCE PER TWO SECS.
021940,000051: # ADDENDUM: HAPO AND HPER SHOULD BE CHANGED TO READ HAPOX AND HPERX IN THE
021941,000052: # ABOVE REMARKS.
021942,000053:
021943,000054: # CALLING SEQUENCE: VERB 82 ENTER.
021944,000055:
021945,000056: # SUBROUTINES CALLED: SR30.1, GOXDSPF
021946,000057: # MAYBE - THISPREC, OTHPREC, LOADTIME, DELRSPL
021947,000058:
021948,000059: # NORMAL EXIT MODES: TC ENDEXT
021949,000060:
021950,000061: # ALARMS: NONE
021951,000062:
021952,000063: # OUTPUT: HAPOX (-29) M
021953,000064: # HPERX (-29) M
021954,000065: # RAPO (-29) M EARTH
021955,000066: # (-27) M MOON
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Page 515
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021957,000068: # RPER (-29) M EARTH
021958,000069: # (-27) M MOON
021959,000070: # TFF (-28) CS CONTAINS NEGATIVE QUANTITY
021960,000071: # -TPER (-28) CS CONTAINS NEGATIVE QUANTITY
021961,000072: # RSP-RREC(-29) M IF DELRSPL CALLED
021962,000073:
021963,000074: # ERASABLE INITIALIZATION REQUIRED: STATE VECTOR.
021964,000075:
021965,000076: # DEBRIS: QPRET, RONE, VONE, TFF/RTMU, HPERMIN, RPADTEM, V82EMFLG.
021966,000077: # MAYBE: TSTART82, V82FLAGS, TDEC1.
021967,000078:
021968,000079: 13,2231 E4,1751 EBANK= HAPOX
021969,000080: 31,2332 BANK 31
021970,000081: 23,2000 SETLOC R30LOC
021971,000082: 23,2000 BANK
021972,000083: 23,2332 COUNT* $$/R30
021973,000084:
021974,000085: 23,2332 06006 V82CALL TC INTPRET
021975,000086: 23,2333 52014 BON GOTO
021976,000087: 23,2334 00716 AVEGFLAG
021977,000088: 23,2335 46566 V82GON # IF AVERAGE G ON
021978,000089: 23,2336 46337 V82GOFF # IF AVERAGE G OFF
021979,000090:
021980,000091: 23,2337 77776 V82GOFF EXIT # ALLOW ASTRONAUT TO SELECT VEHICLE
021981,000092: 23,2340 35016 CAF TWO # DESIRED FOR ORBITAL PARAMETERS
021982,000093: 23,2341 55051 TS OPTIONX
021983,000094: 23,2342 35017 CAF ONE
021984,000095: 23,2343 55052 TS OPTIONX +1
021985,000096: 23,2344 32406 CAF OPTIONVN # V 04 N 06
021986,000097: 23,2345 04662 TC BANKCALL
021987,000098: 23,2346 20561 CADR GOXDSPF
021988,000099: 23,2347 05534 TC ENDEXT # TERMINATE
021989,000100: 23,2350 02352 TC +2 # PROCEED
021990,000101: 23,2351 02344 TC -5 # DATA IN. OPTIONX +1 = 1 FOR THIS VEHIC.
021991,000102: # UNEQ 1 FOR OTHER VEHICLE.
021992,000103: 23,2352 35014 CAF BIT4 # 80 MS
021993,000104: 23,2353 05245 TC WAITLIST
021994,000105: 23,2354 E4,1743 EBANK= TFF
021995,000106: 23,2354 02531 46064 2CADR TICKTEST
021996,000107:
021997,000108: 23,2356 00003 RELINT
021998,000109: 23,2357 32410 V82GOFLP CAF TFFBANK # MAJOR RECYCLE LOOP ENTRY
021999,000110: 23,2360 54003 TS EBANK
022000,000111: 23,2361 35021 CAF ZERO
022001,000112: 23,2362 55742 TS V82FLAGS # ZERO FLAGS FOR TICKTEST. INHIBITS
022002,000113: # DECREMENTING OF TFF AND -TPER.
022003,000114: 23,2363 35063 CAF PRIO7
022004,000115: 23,2364 05147 TC FINDVAC # V82GOFF1 WILL EXECUTE STATE VECTOR
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Page 516
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022006,000117: 23,2365 E4,1743 EBANK= TFF # UPDATE AND ORBIT CALCULATIONS FOR
022007,000118: 23,2365 02411 46064 2CADR V82GOFF1 # SELECTED VEHICLE ABOUT PROPER BODY.
022008,000119:
022009,000120: 23,2367 00003 RELINT
022010,000121: 23,2370 36214 V82STALL CAF THREE # STALL IN THIS LOOP AND WITHOLD V 16 N 44
022011,000122: 23,2371 71742 MASK V82FLAGS # UNTIL STATE VECTOR UPDATE SETS ONE OF
022012,000123: 23,2372 10000 CCS A # OUR FLAG BITS.
022013,000124: 23,2373 02400 TC FLAGGON # EXIT FROM STALL LOOP.
022014,000125: 23,2374 35041 CAF 1SEC
022015,000126: 23,2375 04662 TC BANKCALL
022016,000127: 23,2376 01732 CADR DELAYJOB
022017,000128: 23,2377 02370 TC V82STALL
022018,000129:
022019,000130: 23,2400 32407 FLAGGON CAF V16N44 # MONITOR HAPO,HPER,TFF.
022020,000131: 23,2401 04662 TC BANKCALL
022021,000132: 23,2402 20561 CADR GOXDSPF
022022,000133: 23,2403 05625 TC B5OFF # TERM THIS TELLS TICKTEST TO KILL ITSELF
022023,000134: 23,2404 05625 TC B5OFF # PROCEED DITTO
022024,000135: 23,2405 02357 TC V82GOFLP # RECYCLE RECOMPUTE STATE VECT + DISPLAY
022025,000136:
022026,000137: 23,2406 01014 OPTIONVN VN 0412
022027,000138: 23,2407 04054 V16N44 VN 1644
022028,000139: 23,2410 02343 TFFBANK ECADR TFF
022029,000140:
022030,000141: 23,2411 06006 V82GOFF1 TC INTPRET
022031,000142: 23,2412 77634 RTB
022032,000143: 23,2413 45510 LOADTIME
022033,000144: 23,2414 00041 STORE TDEC1 # TIME FOR STATE VECTOR UPDATE.
022034,000145: 23,2415 02325 STORE TSTART82 # TIME FOR INTERNAL USE.
022035,000146: 23,2416 77776 EXIT
022036,000147: 23,2417 41052 CS OPTIONX +1 # 1 FOR THIS VEHICLE, NOT 1 FOR OTHER
022037,000148: 23,2420 65017 AD ONE
022038,000149: 23,2421 00006 EXTEND
022039,000150: 23,2422 12446 BZF THISSHIP
022040,000151: 23,2423 06006 OTHSHIP TC INTPRET
022041,000152: 23,2424 77624 CALL # CALL STATE VECTOR UPDATE FOR OTHER SHIP.
022042,000153: 23,2425 27105 OTHPREC
022043,000154: 23,2426 77775 BOTHSHIP VLOAD # MOVE RESULTS INTO TFFCONIC STORAGE AREAS
022044,000155: 23,2427 00001 RATT # TO BE CALLED BY SR30.1.
022045,000156: 23,2430 26327 STOVL RONE # RATT AT (-29)M FOR EARTH OR MOON
022046,000157: 23,2431 00007 VATT
022047,000158: 23,2432 02335 STORE VONE # VATT AT (-7)M/CS FOR EARTH OR MOON
022048,000159: 23,2433 77743 DLOAD*
022049,000160: 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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022052,000163: 23,2435 00037 STORE TFF/RTMU # X2 IS 2 FOR MOON
022053,000164: 23,2436 77743 DLOAD* # AS LEFT BY THISPREC OR OTHPREC.
022054,000165: 23,2437 71315 MINPERE,2
022055,000166: 23,2440 02321 STORE HPERMIN # TFFRTMU, HPERMIN AND RPADTEM ARE ALL
022056,000167: 23,2441 46135 SLOAD BHIZ # EARTH/MOON PARAMETERS AS SET HERE.
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Page 517
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022058,000169: 23,2442 00050 X2
022059,000170: 23,2443 46463 EARTHPAD
022060,000171: 23,2444 77650 GOTO
022061,000172: 23,2445 46467 MOONPAD
022062,000173: 23,2446 06006 THISSHIP TC INTPRET
022063,000174: 23,2447 77624 CALL # CALL STATE VECTOR UPDATE FOR THIS SHIP.
022064,000175: 23,2450 27071 THISPREC
022065,000176: 23,2451 77650 GOTO
022066,000177: 23,2452 46426 BOTHSHIP
022067,000178:
022068,000179: # THE FOLLOWING CONSTANTS ARE PAIRWISE INDEXED. DO NOT SEPARATE PAIRS.
022069,000180:
022070,000181: 23,2453 27533 07571 1/RTMUM 2DEC* .45162595 E-4 B14*
022071,000182: 23,2455 25004 06702 1/RTMUE 2DEC* .50087529 E-5 B17*
022072,000183:
022073,000184: 23,2457 00001 11530 MINPERM 2DEC 10668 B-27 # 35 KFT MIN PERIGEE HEIGHT FOR MOON(-27)M
022074,000185: 23,2461 00002 31230 MINPERE 2DEC 91440 B-29 # 300 KFT (-29)M FOR EARTH
022075,000186:
022076,000187: 23,2463 43145 EARTHPAD DLOAD CLRGO # PAD 37-B RADIUS. SCALED AT (-29)M.
022077,000188: 23,2464 05152 RPAD
022078,000189: 23,2465 04622 V82EMFLG # INDICATE EARTH SCALING FOR SR30.1
022079,000190: 23,2466 46473 BOTHPAD
022080,000191:
022081,000192: 23,2467 51575 MOONPAD VLOAD ABVAL # COMPUTE MOON PAD RADIUS FROM RLS VECTOR.
022082,000193: 23,2470 02026 RLS # SCALED AT (-27)M.
022083,000194: 23,2471 77614 SET
022084,000195: 23,2472 04462 V82EMFLG # INDICATE MOON SCALING FOR SR30.1
022085,000196: 23,2473 36323 BOTHPAD STCALL RPADTEM
022086,000197: 23,2474 46667 SR30.1 # CALCULATE ORBITAL PARAMETERS
022087,000198: 23,2475 77776 EXIT
022088,000199: 23,2476 31011 CA MODREG # ARE WE IN POO
022089,000200: 23,2477 00006 EXTEND
022090,000201: 23,2500 12645 BZF CANDEL # YES, DO DELRSPL
022091,000202: 23,2501 06006 SPLRET1 TC INTPRET
022092,000203: 23,2502 45234 RTB DSU
022093,000204: 23,2503 45510 LOADTIME
022094,000205: 23,2504 02325 TSTART82 # PRESENT TIME - TIME V82GOFF1 BEGAN
022095,000206: 23,2505 02325 STORE TSTART82 # SAVE IT
022096,000207: 23,2506 53145 DLOAD BZE # SR30.1 SETS -TPER=0 IF HPER L/
022097,000208: 23,2507 02346 -TPER # HPERMIN (300 OR 35) KFT.
022098,000209: 23,2510 46521 TICKTFF # (-TPER = 0)
022099,000210: 23,2511 43345 TICKTPER DLOAD DAD # (-TPER NON ZERO) TFF WAS NOT COMPUTED,
022100,000211: 23,2512 02346 -TPER # BUT WAS SET TO 59M59S. DONT TICK TFF, DO
022101,000212: 23,2513 02325 TSTART82 # TICK -TPER. DISPLAY BOTH.
022102,000213: 23,2514 02346 STORE -TPER # -TPER CORRECTED FOR TIME SINCE V82GOFF1
022103,000214: 23,2515 77776 EXIT # BEGAN.
022104,000215:
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Page 518
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022106,000217: 23,2516 35017 CAF BIT1
022107,000218: 23,2517 55742 TS V82FLAGS # INFORMS TICKTEST TO INCREMENT ONLY -TPER
022108,000219: 23,2520 05217 TC ENDOFJOB
022109,000220:
022110,000221: 23,2521 43345 TICKTFF DLOAD DAD # (-TPER=0) TFF WAS COMPUTED. TICK TFF.
022111,000222: 23,2522 02344 TFF # DO NOT TICK -TPER. DISPLAY TFF, BUT NOT
022112,000223: 23,2523 02325 TSTART82 # -TPER.
022113,000224: 23,2524 02344 STORE TFF # TFF CORRECTED FOR TIME SINCE V82GOFF1
022114,000225: 23,2525 77776 EXIT # BEGAN.
022115,000226: 23,2526 35016 CAF BIT2
022116,000227: 23,2527 55742 TS V82FLAGS # INFORMS TICKTEST TO INCREMENT ONLY TFF.
022117,000228: 23,2530 05217 TC ENDOFJOB
022118,000229:
022119,000230: 23,2531 35013 TICKTEST CAF BIT5 # THIS WAITLIST PROGRAM PERPETUATES ITSELF
022120,000231: 23,2532 71044 MASK EXTVBACT # ONCE A SEC UNTIL BIT 5 OF EXTVBACT =0.
022121,000232: 23,2533 10000 CCS A
022122,000233: 23,2534 02542 TC DOTICK
022123,000234: 23,2535 37662 CAF PRIO25
022124,000235: 23,2536 05134 TC NOVAC # TERMINATE V 82. CANT CALL ENDEXT IN RUPT.
022125,000236: 23,2537 1044 EBANK= EXTVBACT
022126,000237: 23,2537 05534 04062 2CADR ENDEXT
022127,000238:
022128,000239: 23,2541 05324 TC TASKOVER
022129,000240: 23,2542 35041 DOTICK CAF 1SEC # RE-REQUEST TICKTEST.
022130,000241: 23,2543 05245 TC WAITLIST
022131,000242: 23,2544 E4,1743 EBANK= TFF
022132,000243: 23,2544 02531 46064 2CADR TICKTEST
022133,000244:
022134,000245: 23,2546 36214 CAF THREE
022135,000246: 23,2547 71742 MASK V82FLAGS
022136,000247: 23,2550 50000 INDEX A
022137,000248: 23,2551 02552 TC +1
022138,000249: 23,2552 05324 TC TASKOVER # IF NO FLAGBITS SET DONT CHANGE TFF OR
022139,000250: # -TPER, BUT CONTINUE LOOP.
022140,000251: 23,2553 02561 TC TPERTICK # ONLY BIT 1 SET. INCR -TPER BY 1 SEC.
022141,000252: 23,2554 35041 TFFTICK CAF 1SEC # ONLY BIT 2 SET. INCR TFF BY 1 SEC.
022142,000253: 23,2555 54001 TS L
022143,000254: 23,2556 35021 CAF ZERO
022144,000255: 23,2557 21744 DAS TFF
022145,000256: 23,2560 05324 TC TASKOVER
022146,000257: 23,2561 35041 TPERTICK CAF 1SEC
022147,000258: 23,2562 54001 TS L
022148,000259: 23,2563 35021 CAF ZERO
022149,000260: 23,2564 21746 DAS -TPER
022150,000261: 23,2565 05324 TC TASKOVER
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Page 519
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022152,000263: 23,2566 77776 V82GON EXIT # AVERAGE G ON. USE CURRENT STATE VECTOR
022153,000264: # FOR ORBITAL PARAMETER CALCULATIONS.
022154,000265: 23,2567 35063 CAF PRIO7 # LESS THAN LAMBERT
022155,000266: 23,2570 05147 TC FINDVAC # V82GON1 WILL PERFORM ORBIT CALCULATIONS
022156,000267: 23,2571 E4,1743 EBANK= TFF # ABOUT PROPER BODY APPROX ONCE PER SEC.
022157,000268: 23,2571 02604 46064 2CADR V82GON1
022158,000269:
022159,000270: 23,2573 00003 RELINT
022160,000271: 23,2574 10067 CCS NEWJOB # WITHOLD V16 N44 UNTIL FIRST ORBIT CALC
022161,000272: 23,2575 05164 TC CHANG1 # IS DONE. NOTE: V82GON1 (PRIO7, FINDVAC
022162,000273: # JOB) IS COMPLETED BEFORE V82GON (PRIO7,
022163,000274: # NOVAC JOB).
022164,000275: 23,2576 32407 V82REDSP CAF V16N44 # MONITOR HAPO, HPER, TFF
022165,000276: 23,2577 04662 TC BANKCALL
022166,000277: 23,2600 20561 CADR GOXDSPF
022167,000278: 23,2601 05625 TC B5OFF # TERM THIS TELLS V82GON1 TO KILL ITSELF.
022168,000279: 23,2602 05625 TC B5OFF # PROC DITTO.
022169,000280: 23,2603 02576 TC V82REDSP # RECYCLE
022170,000281:
022171,000282: 23,2604 06006 V82GON1 TC INTPRET # THIS EXEC PROGRAM PERPETUATES ITSELF
022172,000283: # ONCE A SEC UNTIL BIT 5 OF EXTVBACT =0.
022173,000284: 23,2605 52175 VLOAD GOTO # HOLDS OFF CCS NEWJOB BETWEEN RN AND
022174,000285: 23,2606 01171 RN # VN FETCH SO RN, VN ARE FROM SAME
022175,000286: 23,2607 46610 NEXTLINE # STATE VECTOR UPDATE.
022176,000287: 23,2610 26327 NEXTLINE STOVL RONE # RN AT (-29)M FOR EARTH OR MOON
022177,000288: 23,2611 01177 VN
022178,000289: 23,2612 02335 STORE VONE # VN AT (-7)M/CS FOR EARTH OR MOON
022179,000290: 23,2613 52014 BON GOTO
022180,000291: 23,2614 00315 AMOONFLG # FLAG INDICATES BODY ABOUT WHICH ORBITAL
022181,000292: 23,2615 46617 MOONGON # CALCULATIONS ARE TO BE PERFORMED.
022182,000293: 23,2616 46630 EARTHGON # IF SET - MOON, IF RESET - EARTH.
022183,000294:
022184,000295: 23,2617 71214 MOONGON SET DLOAD
022185,000296: 23,2620 04462 V82EMFLG # INDICATE MOON SCALING FOR SR30.1
022186,000297: 23,2621 06454 1/RTMUM # LUNAR PARAMETERS LOADED HERE FOR SR30.1
022187,000298: 23,2622 14037 STODL TFF/RTMU
022188,000299: 23,2623 06460 MINPERM
022189,000300: 23,2624 26321 STOVL HPERMIN
022190,000301: 23,2625 02026 RLS # SCALED AT (-27)M.
022191,000302: 23,2626 52046 ABVAL GOTO
022192,000303: 23,2627 46637 V82GON2
022193,000304: 23,2630 71214 EARTHGON CLEAR DLOAD
022194,000305: 23,2631 04662 V82EMFLG # INDICATE EARTH SCALING FOR SR30.1
022195,000306: 23,2632 06456 1/RTMUE # EARTH PARAMETERS LOADED HERE FOR SR30.1
022196,000307: 23,2633 14037 STODL TFF/RTMU
022197,000308: 23,2634 06462 MINPERE
022198,000309: 23,2635 16321 STODL HPERMIN
022199,000310: 23,2636 05152 RPAD
022200,000311: 23,2637 36323 V82GON2 STCALL RPADTEM # COMMON CODE FOR EARTH & MOON.
022201,000312: 23,2640 46667 SR30.1
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Page 520
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022203,000314: 23,2641 77776 EXIT
022204,000315: 23,2642 05364 TC CHECKMM
022205,000316: 23,2643 00013 DEC 11 B-14
022206,000317: 23,2644 02657 TC V82GON3 # NOT IN MODE 11.
022207,000318: 23,2645 06006 CANDEL TC INTPRET # IN MODE 11 OR 00
022208,000319: 23,2646 77624 CALL
022209,000320: 23,2647 27442 INTSTALL # DELRSPL DOES INTWAKE
022210,000321: 23,2650 45145 DLOAD CALL
022211,000322: 23,2651 02344 TFF
022212,000323: 23,2652 64017 DELRSPL # RETURN IS TO NEXT LINE (SPLRET).
022213,000324: 23,2653 77776 SPLRET EXIT
022214,000325:
022215,000326: 23,2654 31011 CA MODREG
022216,000327: 23,2655 00006 EXTEND
022217,000328: 23,2656 12501 BZF SPLRET1
022218,000329: 23,2657 35013 V82GON3 CAF BIT5
022219,000330: 23,2660 71044 MASK EXTVBACT # SEE IF ASTRONAUT HAS SIGNALLED TERMINATE
022220,000331: 23,2661 00006 EXTEND
022221,000332: 23,2662 15534 BZF ENDEXT # YES, TERMINATE VB 82 LOOP
022222,000333: 23,2663 35041 CAF 1SEC
022223,000334: 23,2664 04662 TC BANKCALL # WAIT ONE SECOND BEFORE REPEATING
022224,000335: 23,2665 01732 CADR DELAYJOB # ORBITAL PARAMETER COMPUTATION.
022225,000336: 23,2666 02604 TC V82GON1
022226,000337:
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022228,000339: # SUBROUTINE NAME: SR30.1
022229,000340: # MOD NO: 0 DATE: 16 FEB 67
022230,000341: # MOD BY: RR BAIRNSFATHER LOG SECTION: R32
022231,000342: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 11 APR 67 SR30.1 CHANGED TO ALLOW MONITOR OPERN
022232,000343: # MOD NO: 2 MOD BY: RR BAIRNSFATHER DATE: 14 APR 67 ADD OVFL CK FOR RAPO
022233,000344: # MOD NO: 3 MOD BY ALONSO DATE: 11 DEC 67 SUBROUTINE REWRITTEN
022234,000345: # MOD NO: 4 MOD BY ALONSO DATE: 26 MAR 68 PROG MOD TO HANDLE DIF EARTH/MOON SCALE
022235,000346: # MOD NO: 5 MOD BY: RR BAIRNSFATHER DATE: 6 AUG 68 OVFL CK FOR HAPO & HPER. VOIDS MOD #2.
022236,000347:
022237,000348: # NEW FUNCTIONAL DESCRIPTION: ORBITAL PARAMETERS DISPLAY FOR NOUNS 32 AND 44.
022238,000349: # SR30.1 CALLS TFFCONMU AND TFFRP/RA TO CALCULATE RPER (PERIGEE RADIUS),
022239,000350: # RAPO (APOGEE RADIUS), HPER (PERIGEE HEIGHT ABOVE LAUNCH PAD OR LUNAR
022240,000351: # LANDING SITE), HAPO (APOGEE HEIGHT AS ABOVE), TPER (TIME TO PERIGEE),
022241,000352: # TFF (TIME TO INTERSECT 300 KFT ABOVE PAD OR 35KFT ABOVE LANDING SITE).
022242,000353: # IF HPER IS GREATER THAN OR EQUAL TO HPERMIN, CALCULATES TPER AND STORES
022243,000354: # NEGATIVE IN -TPER. OTHERWISE STORES +0 IN -TPER. WHENEVER TPER IS
022244,000355: # CALCULATED, TFF IS NOT COMPUTABLE AND DEFAULTS TO -59MIN 59SEC. IF HAPO
022245,000356: # WOULD EXCEED 9999.9 NM, IT IS LIMITED TO THAT VALUE FOR DISPLAY.
022246,000357:
022247,000358: # ADDENDUM: HAPO AND HPER SHOULD BE CHANGED TO READ HAPOX AND HPERX IN THE
022248,000359: # ABOVE REMARKS.
022249,000360:
022250,000361: # CALLING SEQUENCE: CALL
022251,000362: # SR30.1
022252,000363:
022253,000364: # SUBROUTINES CALLED: TFFCONMU, TFFRP/RA, CALCTPER, CALCTFF
022254,000365:
022255,000366: # NORMAL EXIT MODE: CALLING LINE +1 (STILL IN INTERPRETIVE MODE)
022256,000367:
022257,000368: # ALARMS: NONE
022258,000369:
022259,000370: # OUTPUT: RAPO (-29) M EARTH APOGEE RADIUS EARTH CENTERED COORD.
022260,000371: # (-27) M MOON MOON CENTERED COORD.
022261,000372: # RPER (-29) M EARTH PERIGEE RADIUS EARTH CENTERED COORD.
022262,000373: # (-27) M MOON MOON CENTERED COORD.
022263,000374: # HAPOX (-29) M APOGEE ALTITUDE ABOVE PAD OR LAND. SITE MAX VALUE LIMITED TO 9999.9 NM.
022264,000375: # HPERX (-29) M PERIGEE ALT. ABOVE PAD OR LAND. SITE MAX VALUE LIMITED TO 9999.9 NM.
022265,000376: # TFF (-28) CS TIME TO 300KFT OR 35KFT ALTITUDE
022266,000377: # -TPER (-28) CS TIME TO PERIGEE
022267,000378:
022268,000379: # ERASABLE INITIALIZATION REQUIRED -
022269,000380: # TFF/RTMU (+17) EARTH RECIPROCAL OF PROPER GRAV CONSTANT FOR
022270,000381: # (+14) MOON EARTH OR MOON = 1/SQRT(MU).
022271,000382: # RONE (-29) M STATE VECTOR
022272,000383: # VONE (-7) M/CS STATE VECTOR
022273,000384: # RPADTEM (-29) M EARTH RADIUS OF LAUNCH PAD OR LUNAR LANDING
022274,000385: # (-27) M MOON SITE.
022275,000386: # HPERMIN (-29) M EARTH (300 OR 35) KFT MINIMUM PERIGEE ALTITUDE
022276,000387: # (-27) M MOON ABOVE LAUNCH PAD OR LUNAR LANDING SITE.
022277,000388: # V82EMFLG (INT SW BIT) RESET FOR EARTH, SET FOR MOON.
022278,000389:
022279,000390: # DEBRIS: QPRET, PDL, S2
022280,000391:
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022282,000393: 23,2667 COUNT* $$/SR30S
022283,000394:
022284,000395: 23,2667 44001 SR30.1 SETPD STQ # INITIALIZE PUSHDOWN LIST.
022285,000396: 23,2670 00001 0
022286,000397: 23,2671 00051 S2
022287,000398: # SR30.1 INPUT: RONE AT (-29)M EARTH/MOON
022288,000399: # VONE AT (-7)M/CS
022289,000400: # TFFCONMU, TFFRP/RA, CALCTPER AND CALCTFF
022290,000401: # CALLS REQUIRE:
022291,000402: # EARTH CENTERED (NO RESCALING REQUIRED)
022292,000403: # RONE SCALED TO B-29 M
022293,000404: # VONE SCALED TO B-7 M/CS
022294,000405: # MOON CENTERED (RESCALING REQUIRED)
022295,000406: # RONE SCALED TO B-27 M
022296,000407: # VONE SCALED TO B-5 M/CS
022297,000408: 23,2672 77214 BOFF VLOAD
022298,000409: 23,2673 04742 V82EMFLG # OFF FOR EARTH, ON FOR MOON.
022299,000410: 23,2674 46703 TFFCALLS
022300,000411: 23,2675 02327 RONE
022301,000412: 23,2676 77752 VSL2
022302,000413: 23,2677 26327 STOVL RONE
022303,000414: 23,2700 02335 VONE
022304,000415: 23,2701 77752 VSL2
022305,000416: 23,2702 02335 STORE VONE
022306,000417: 23,2703 77624 TFFCALLS CALL
022307,000418: 23,2704 56760 TFFCONMU
022308,000419: 23,2705 77624 CALL # TFFRP/RA COMPUTES RAPO,RPER.
022309,000420: 23,2706 57026 TFFRP/RA
022310,000421: # RETURNS WITH RAPO IN D(MPAC).
022311,000422: 23,2707 77625 DSU
022312,000423: 23,2710 02323 RPADTEM
022313,000424: 23,2711 64414 BOFF SR2R # NEED HAPO AT (-29)M FOR DISPLAY.
022314,000425: # IF MOON CENTERED, RESCALE FROM (-27)M.
022315,000426: # IF EARTH CENTERED ALREADY AT (-29)M.
022316,000427: 23,2712 04742 V82EMFLG # OFF FOR EARTH, ON FOR MOON.
022317,000428: 23,2713 46714 +1
022318,000429: 23,2714 77624 CALL # IF HAPO > MAXNM, SET HAPO =9999.9 NM.
022319,000430: 23,2715 46754 MAXCHK # OTHERWISE STORE (RAPO-RPADTEM) IN HAPO.
022320,000431: 23,2716 16352 STORHAPO STODL HAPOX
022321,000432: 23,2717 00017 RPER
022322,000433: 23,2720 77625 DSU
022323,000434: 23,2721 02323 RPADTEM # GIVES HPER AT (-29)M EARTH, (-27)M MOON.
022324,000435: 23,2722 00161 STORE MPAC +4 # SAVE THIS FOR COMPARISON TO HPERMIN.
022325,000436: 23,2723 64414 BOFF SR2R # NEED HPER AT (-29)M FOR DISPLAY.
022326,000437: # IF MOON CENTERED, RESCALE FROM (-27)M.
022327,000438: # IF EARTH CENTERED ALREADY AT (-29)M.
022328,000439: 23,2724 04742 V82EMFLG # OFF FOR EARTH, ON FOR MOON.
022329,000440: 23,2725 46726 +1
022330,000441: 23,2726 77624 CALL # IF HPER > MAXNM, SET HPER = 9999.9 NM.
022331,000442: 23,2727 46754 MAXCHK
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022333,000444: 23,2730 16354 STORHPER STODL HPERX # STORE (RPER - RPADTEM) INTO HPERX.
022334,000445: 23,2731 00161 MPAC +4
022335,000446: 23,2732 51025 DSU BPL # HPERMIN AT (-29)M FOR EARTH, (-27)M MOON
022336,000447: 23,2733 02321 HPERMIN # IF HPER L/ HPERMIN (300 OR 35) KFT,
022337,000448: 23,2734 46740 DOTPER # THEN ZERO INTO -TPER.
022338,000449: 23,2735 52145 DLOAD GOTO # OTHERWISE CALCULATE TPER.
022339,000450: 23,2736 15335 HI6ZEROS
022340,000451: 23,2737 46744 SKIPTPER
022341,000452: 23,2740 45145 DOTPER DLOAD CALL
022342,000453: 23,2741 00017 RPER
022343,000454: 23,2742 57064 CALCTPER
022344,000455: 23,2743 77676 DCOMP # TPER IS PUT NEG INTO -TPER.
022345,000456: 23,2744 16346 SKIPTPER STODL -TPER
022346,000457: 23,2745 02321 HPERMIN # HPERMIN AT (-29)M FOR EARTH, (-27)M MOON
022347,000458: 23,2746 45015 DAD CALL
022348,000459: 23,2747 02323 RPADTEM # RPADTEM AT (-29)M FOR EARTH, (-27)M MOON
022349,000460: 23,2750 57067 CALCTFF # GIVES 59M59S FOR TFF IF RPER G/
022350,000461: 23,2751 77676 DCOMP # HPERMIN + RPADTEM. (TPER WAS NON ZERO)
022351,000462: 23,2752 36344 STCALL TFF # OTHERWISE COMPUTES TFF. (GOTO)
022352,000463: 23,2753 00051 S2
022353,000464:
022354,000465: 23,2754 51025 MAXCHK DSU BPL # IF C(MPAC) > 9999.9 NM, MPAC = 9999.9 NM
022355,000466: 23,2755 06764 MAXNM
022356,000467: 23,2756 46761 +3 # OTHERWISE C(MPAC) = B(MPAC).
022357,000468: 23,2757 43415 DAD RVQ
022358,000469: 23,2760 06764 MAXNM
022359,000470: 23,2761 43545 +3 DLOAD RVQ # (USED BY P30 - P37 ALSO)
022360,000471: 23,2762 06764 MAXNM
022361,000472:
022362,000473: 23,2763 01065 05603 MAXNM 2OCT 0106505603
022363,000474:
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Page 524
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022365,000476:
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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