Source Code
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These source-code files were from the printout at the MIT Museum, with many thanks
to Deborah Douglas, the Museum's Curator of Science and Technology, for releasing
it to us. The printout was digitally photographed by Paul Fjeld. A team of
volunteers transcribed the source code manually from these images or, where
appropriate, modified already-transcribed but similar source Colossus 249 (Apollo 9)
source code to agree with the images from the printout. Note that the page images
presented online are of reduced quality, and that higher-quality images
are available. Report any conversion errors or legibility
problems in page images to info@sandroid.org.
Notations on the program listing read, in part:GAP: ASSEMBLE REVISION 055 OF AGC PROGRAM COMANCHE BY NASA 2021113-051 10:28 APR. 1,1969Note that the date is the date of the printout, not the date of the program revision. |
022430,000002: ## Copyright: Public domain.
022431,000003: ## Filename: R30.agc
022432,000004: ## Purpose: Part of the source code for Colossus 2A, AKA Comanche 055.
022433,000005: ## It is part of the source code for the Command Module's (CM)
022434,000006: ## Apollo Guidance Computer (AGC), for Apollo 11.
022435,000007: ## Assembler: yaYUL
022436,000008: ## Contact: Hartmuth Gutsche <hgutsche@xplornet.com>.
022437,000009: ## Website: www.ibiblio.org/apollo.
022438,000010: ## Pages: 514-524
022439,000011: ## Mod history: 2009-05-09 HG Started adapting from the Colossus249/ file
022440,000012: ## of the same name, using Comanche055 page
022441,000013: ## images 0514.jpg - 0524.jpg.
022442,000014: ## 2016-12-10 RSB Proofed comments with octopus/ProoferComments
022443,000015: ## and fixed the errors found.
022444,000016: ## 2017-01-18 RSB Fixed comment-text errors noted while diff'ing
022445,000017: ## vs Colossus 249.
022446,000018: ## 2017-02-08 RSB Comment-text fixes discovered while proofing Artemis 72.
022447,000019: ##
022448,000020: ## This source code has been transcribed or otherwise adapted from digitized
022449,000021: ## images of a hardcopy from the MIT Museum. The digitization was performed
022450,000022: ## by Paul Fjeld, and arranged for by Deborah Douglas of the Museum. Many
022451,000023: ## thanks to both. The images (with suitable reduction in storage size and
022452,000024: ## consequent reduction in image quality as well) are available online at
022453,000025: ## www.ibiblio.org/apollo. If for some reason you find that the images are
022454,000026: ## illegible, contact me at info@sandroid.org about getting access to the
022455,000027: ## (much) higher-quality images which Paul actually created.
022456,000028: ##
022457,000029: ## Notations on the hardcopy document read, in part:
022458,000030: ##
022459,000031: ## Assemble revision 055 of AGC program Comanche by NASA
022460,000032: ## 2021113-051. 10:28 APR. 1, 1969
022461,000033: ##
022462,000034: ## This AGC program shall also be referred to as
022463,000035: ## Colossus 2A
022464,000036:
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Page 514 |
022466,000038: # SUBROUTINE NAME: V82CALL
022467,000039: # MOD NO: 0 DATE: 16 FEB 67
022468,000040: # MOD BY: RR BAIRNSFATHER LOG SECTION: R30
022469,000041: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 11 APR 67 SR30.1 CHANGED TO ALLOW MONITOR OPERN
022470,000042: # MOD NO: 2 MOD BY ALONSO DATE: 11 DEC 67 VB82 PROGRAM REWRITTEN
022471,000043: # MOD NO: 3 MOD BY ALONSO DATE: 26 MAR 68 PROG MOD TO HANDLE DIF EARTH/MOON SCALE
022472,000044:
022473,000045: # NEW FUNCTIONAL DESCRIPTION: CALLED BY VERB 82 ENTER. PRIORITY 10
022474,000046: # USED THROUGHOUT. CALCULATE AND DISPLAY ORBITAL PARAMETERS
022475,000047:
022476,000048: # 1. IF AVERAGE G IS OFF:
022477,000049: # FLASH DISPLAY V04N06. R2 INDICATES WHICH SHIP'S STATE VECTOR IS
022478,000050: # TO BE UPDATED. INITIAL CHOICE IS THIS SHIP (R2=1). ASTRONAUT
022479,000051: # CAN CHANGE TO OTHER SHIP BY V22EXE, WHERE X NOT EQ 1.
022480,000052: # SELECTED STATE VECTOR UPDATED BY THISPREC (OTHPREC).
022481,000053: # CALLS SR30.1 (WHICH CALLS TFFCONMU + TFFRP/RA) TO CALCULATE
022482,000054: # RPER (PERIGEE RADIUS), RAPO (APOGEE RADIUS), HPER (PERIGEE
022483,000055: # HEIGHT ABOVE LAUNCH PAD OR LUNAR LANDING SITE), HAPO (APOGEE
022484,000056: # HEIGHT AS ABOVE), TPER (TIME TO PERIGEE), TFF (TIME TO
022485,000057: # INTERSECT 300 KFT ABOVE PAD OR 35KFT ABOVE LANDING SITE).
022486,000058: # FLASH MONITOR V16N44 (HAPO, HPER, TFF). TFF IS -59M59S IF IT WAS
022487,000059: # NOT COMPUTABLE, OTHERWISE IT INCREMENTS ONCE PER SECOND.
022488,000060: # ASTRONAUT HAS OPTION TO MONITOR TPER BY KEYING IN N 32 E.
022489,000061: # DISPLAY IS IN HMS, IS NEGATIVE (AS WAS TFF), AND INCREMENTS
022490,000062: # ONCE PER SECOND ONLY IF TFF DISPLAY WAS -59M59S.
022491,000063: # 2. IF AVERAGE G IS ON:
022492,000064: # CALLS SR30.1 APPROX EVERY TWO SECS. STATE VECTOR IS ALWAYS
022493,000065: # FOR THIS VEHICLE. V82 DOES NOT DISTURB STATE VECTOR. RESULTS
022494,000066: # OF SR30.1 ARE RAPO, RPER, HAPO, HPER, TPER, TFF.
022495,000067: # FLASH MONITOR V16N44 (HAPO, HPER, TFF).
022496,000068: # IF MODE IS P11, THEN CALL DELRSPL SO ASTRONAUT CAN MONITOR
022497,000069: # RESULTS BY N50E. SPLASH COMPUTATION DONE ONCE PER TWO SECS.
022498,000070: # ADDENDUM: HAPO AND HPER SHOULD BE CHANGED TO READ HAPOX AND HPERX IN THE
022499,000071: # ABOVE REMARKS.
022500,000072:
022501,000073: # CALLING SEQUENCE: VERB 82 ENTER.
022502,000074:
022503,000075: # SUBROUTINES CALLED: SR30.1, GOXDSPF
022504,000076: # MAYBE - THISPREC, OTHPREC, LOADTIME, DELRSPL
022505,000077:
022506,000078: # NORMAL EXIT MODES: TC ENDEXT
022507,000079:
022508,000080: # ALARMS: NONE
022509,000081:
022510,000082: # OUTPUT: HAPOX (-29) M
022511,000083: # HPERX (-29) M
022512,000084: # RAPO (-29) M EARTH
022513,000085: # (-27) M MOON
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Page 515 |
022515,000087: # RPER (-29) M EARTH
022516,000088: # (-27) M MOON
022517,000089: # TFF (-28) CS CONTAINS NEGATIVE QUANTITY
022518,000090: # -TPER (-28) CS CONTAINS NEGATIVE QUANTITY
022519,000091: # RSP-RREC(-29) M IF DELRSPL CALLED
022520,000092:
022521,000093: # ERASABLE INITIALIZATION REQUIRED: STATE VECTOR.
022522,000094:
022523,000095: # DEBRIS: QPRET, RONE, VONE, TFF/RTMU, HPERMIN, RPADTEM, V82EMFLG.
022524,000096: # MAYBE: TSTART82, V82FLAGS, TDEC1.
022525,000097:
022526,000098: 13,2231 E4,1751 EBANK= HAPOX
022527,000099: 31,2332 BANK 31
022528,000100: 23,2000 SETLOC R30LOC
022529,000101: 23,2000 BANK
022530,000102: 23,2332 COUNT* $$/R30
022531,000103:
022532,000104: 23,2332 06006 V82CALL TC INTPRET
022533,000105: 23,2333 52014 BON GOTO
022534,000106: 23,2334 00716 AVEGFLAG
022535,000107: 23,2335 46566 V82GON # IF AVERAGE G ON
022536,000108: 23,2336 46337 V82GOFF # IF AVERAGE G OFF
022537,000109:
022538,000110: 23,2337 77776 V82GOFF EXIT # ALLOW ASTRONAUT TO SELECT VEHICLE
022539,000111: 23,2340 35016 CAF TWO # DESIRED FOR ORBITAL PARAMETERS
022540,000112: 23,2341 55051 TS OPTIONX
022541,000113: 23,2342 35017 CAF ONE
022542,000114: 23,2343 55052 TS OPTIONX +1
022543,000115: 23,2344 32406 CAF OPTIONVN # V 04 N 06
022544,000116: 23,2345 04662 TC BANKCALL
022545,000117: 23,2346 20561 CADR GOXDSPF
022546,000118: 23,2347 05534 TC ENDEXT # TERMINATE
022547,000119: 23,2350 02352 TC +2 # PROCEED
022548,000120: 23,2351 02344 TC -5 # DATA IN. OPTIONX +1 = 1 FOR THIS VEHIC.
022549,000121: # UNEQ 1 FOR OTHER VEHICLE.
022550,000122: 23,2352 35014 CAF BIT4 # 80 MS
022551,000123: 23,2353 05245 TC WAITLIST
022552,000124: 23,2354 E4,1743 EBANK= TFF
022553,000125: 23,2354 02531 46064 2CADR TICKTEST
022554,000126:
022555,000127: 23,2356 00003 RELINT
022556,000128: 23,2357 32410 V82GOFLP CAF TFFBANK # MAJOR RECYCLE LOOP ENTRY
022557,000129: 23,2360 54003 TS EBANK
022558,000130: 23,2361 35021 CAF ZERO
022559,000131: 23,2362 55742 TS V82FLAGS # ZERO FLAGS FOR TICKTEST. INHIBITS
022560,000132: # DECREMENTING OF TFF AND -TPER.
022561,000133: 23,2363 35063 CAF PRIO7
022562,000134: 23,2364 05147 TC FINDVAC # V82GOFF1 WILL EXECUTE STATE VECTOR
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Page 516 |
022564,000136: 23,2365 E4,1743 EBANK= TFF # UPDATE AND ORBIT CALCULATIONS FOR
022565,000137: 23,2365 02411 46064 2CADR V82GOFF1 # SELECTED VEHICLE ABOUT PROPER BODY.
022566,000138:
022567,000139: 23,2367 00003 RELINT
022568,000140: 23,2370 36214 V82STALL CAF THREE # STALL IN THIS LOOP AND WITHOLD V 16 N 44
022569,000141: 23,2371 71742 MASK V82FLAGS # UNTIL STATE VECTOR UPDATE SETS ONE OF
022570,000142: 23,2372 10000 CCS A # OUR FLAG BITS.
022571,000143: 23,2373 02400 TC FLAGGON # EXIT FROM STALL LOOP.
022572,000144: 23,2374 35041 CAF 1SEC
022573,000145: 23,2375 04662 TC BANKCALL
022574,000146: 23,2376 01732 CADR DELAYJOB
022575,000147: 23,2377 02370 TC V82STALL
022576,000148:
022577,000149: 23,2400 32407 FLAGGON CAF V16N44 # MONITOR HAPO,HPER,TFF.
022578,000150: 23,2401 04662 TC BANKCALL
022579,000151: 23,2402 20561 CADR GOXDSPF
022580,000152: 23,2403 05625 TC B5OFF # TERM THIS TELLS TICKTEST TO KILL ITSELF
022581,000153: 23,2404 05625 TC B5OFF # PROCEED DITTO
022582,000154: 23,2405 02357 TC V82GOFLP # RECYCLE RECOMPUTE STATE VECT + DISPLAY
022583,000155:
022584,000156: 23,2406 01014 OPTIONVN VN 0412
022585,000157: 23,2407 04054 V16N44 VN 1644
022586,000158: 23,2410 02343 TFFBANK ECADR TFF
022587,000159:
022588,000160: 23,2411 06006 V82GOFF1 TC INTPRET
022589,000161: 23,2412 77634 RTB
022590,000162: 23,2413 45510 LOADTIME
022591,000163: 23,2414 00041 STORE TDEC1 # TIME FOR STATE VECTOR UPDATE.
022592,000164: 23,2415 02325 STORE TSTART82 # TIME FOR INTERNAL USE.
022593,000165: 23,2416 77776 EXIT
022594,000166: 23,2417 41052 CS OPTIONX +1 # 1 FOR THIS VEHICLE, NOT 1 FOR OTHER
022595,000167: 23,2420 65017 AD ONE
022596,000168: 23,2421 00006 EXTEND
022597,000169: 23,2422 12446 BZF THISSHIP
022598,000170: 23,2423 06006 OTHSHIP TC INTPRET
022599,000171: 23,2424 77624 CALL # CALL STATE VECTOR UPDATE FOR OTHER SHIP.
022600,000172: 23,2425 27105 OTHPREC
022601,000173: 23,2426 77775 BOTHSHIP VLOAD # MOVE RESULTS INTO TFFCONIC STORAGE AREAS
022602,000174: 23,2427 00001 RATT # TO BE CALLED BY SR30.1.
022603,000175: 23,2430 26327 STOVL RONE # RATT AT (-29)M FOR EARTH OR MOON
022604,000176: 23,2431 00007 VATT
022605,000177: 23,2432 02335 STORE VONE # VATT AT (-7)M/CS FOR EARTH OR MOON
022606,000178: 23,2433 77743 DLOAD*
022607,000179: 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. |
022610,000182: 23,2435 00037 STORE TFF/RTMU # X2 IS 2 FOR MOON
022611,000183: 23,2436 77743 DLOAD* # AS LEFT BY THISPREC OR OTHPREC.
022612,000184: 23,2437 71315 MINPERE,2
022613,000185: 23,2440 02321 STORE HPERMIN # TFFRTMU, HPERMIN AND RPADTEM ARE ALL
022614,000186: 23,2441 46135 SLOAD BHIZ # EARTH/MOON PARAMETERS AS SET HERE.
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Page 517 |
022616,000188: 23,2442 00050 X2
022617,000189: 23,2443 46463 EARTHPAD
022618,000190: 23,2444 77650 GOTO
022619,000191: 23,2445 46467 MOONPAD
022620,000192: 23,2446 06006 THISSHIP TC INTPRET
022621,000193: 23,2447 77624 CALL # CALL STATE VECTOR UPDATE FOR THIS SHIP.
022622,000194: 23,2450 27071 THISPREC
022623,000195: 23,2451 77650 GOTO
022624,000196: 23,2452 46426 BOTHSHIP
022625,000197:
022626,000198: # THE FOLLOWING CONSTANTS ARE PAIRWISE INDEXED. DO NOT SEPARATE PAIRS.
022627,000199:
022628,000200: 23,2453 27533 07571 1/RTMUM 2DEC* .45162595 E-4 B14*
022629,000201: 23,2455 25004 06702 1/RTMUE 2DEC* .50087529 E-5 B17*
022630,000202:
022631,000203: 23,2457 00001 11530 MINPERM 2DEC 10668 B-27 # 35 KFT MIN PERIGEE HEIGHT FOR MOON(-27)M
022632,000204: 23,2461 00002 31230 MINPERE 2DEC 91440 B-29 # 300 KFT (-29)M FOR EARTH
022633,000205:
022634,000206: 23,2463 43145 EARTHPAD DLOAD CLRGO # PAD 37-B RADIUS. SCALED AT (-29)M.
022635,000207: 23,2464 05152 RPAD
022636,000208: 23,2465 04622 V82EMFLG # INDICATE EARTH SCALING FOR SR30.1
022637,000209: 23,2466 46473 BOTHPAD
022638,000210:
022639,000211: 23,2467 51575 MOONPAD VLOAD ABVAL # COMPUTE MOON PAD RADIUS FROM RLS VECTOR.
022640,000212: 23,2470 02026 RLS # SCALED AT (-27)M.
022641,000213: 23,2471 77614 SET
022642,000214: 23,2472 04462 V82EMFLG # INDICATE MOON SCALING FOR SR30.1
022643,000215: 23,2473 36323 BOTHPAD STCALL RPADTEM
022644,000216: 23,2474 46667 SR30.1 # CALCULATE ORBITAL PARAMETERS
022645,000217: 23,2475 77776 EXIT
022646,000218: 23,2476 31011 CA MODREG # ARE WE IN POO
022647,000219: 23,2477 00006 EXTEND
022648,000220: 23,2500 12645 BZF CANDEL # YES, DO DELRSPL
022649,000221: 23,2501 06006 SPLRET1 TC INTPRET
022650,000222: 23,2502 45234 RTB DSU
022651,000223: 23,2503 45510 LOADTIME
022652,000224: 23,2504 02325 TSTART82 # PRESENT TIME - TIME V82GOFF1 BEGAN
022653,000225: 23,2505 02325 STORE TSTART82 # SAVE IT
022654,000226: 23,2506 53145 DLOAD BZE # SR30.1 SETS -TPER=0 IF HPER L/
022655,000227: 23,2507 02346 -TPER # HPERMIN (300 OR 35) KFT.
022656,000228: 23,2510 46521 TICKTFF # (-TPER = 0)
022657,000229: 23,2511 43345 TICKTPER DLOAD DAD # (-TPER NON ZERO) TFF WAS NOT COMPUTED,
022658,000230: 23,2512 02346 -TPER # BUT WAS SET TO 59M59S. DONT TICK TFF, DO
022659,000231: 23,2513 02325 TSTART82 # TICK -TPER. DISPLAY BOTH.
022660,000232: 23,2514 02346 STORE -TPER # -TPER CORRECTED FOR TIME SINCE V82GOFF1
022661,000233: 23,2515 77776 EXIT # BEGAN.
022662,000234:
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Page 518 |
022664,000236: 23,2516 35017 CAF BIT1
022665,000237: 23,2517 55742 TS V82FLAGS # INFORMS TICKTEST TO INCREMENT ONLY -TPER
022666,000238: 23,2520 05217 TC ENDOFJOB
022667,000239:
022668,000240: 23,2521 43345 TICKTFF DLOAD DAD # (-TPER=0) TFF WAS COMPUTED. TICK TFF.
022669,000241: 23,2522 02344 TFF # DO NOT TICK -TPER. DISPLAY TFF, BUT NOT
022670,000242: 23,2523 02325 TSTART82 # -TPER.
022671,000243: 23,2524 02344 STORE TFF # TFF CORRECTED FOR TIME SINCE V82GOFF1
022672,000244: 23,2525 77776 EXIT # BEGAN.
022673,000245: 23,2526 35016 CAF BIT2
022674,000246: 23,2527 55742 TS V82FLAGS # INFORMS TICKTEST TO INCREMENT ONLY TFF.
022675,000247: 23,2530 05217 TC ENDOFJOB
022676,000248:
022677,000249: 23,2531 35013 TICKTEST CAF BIT5 # THIS WAITLIST PROGRAM PERPETUATES ITSELF
022678,000250: 23,2532 71044 MASK EXTVBACT # ONCE A SEC UNTIL BIT 5 OF EXTVBACT =0.
022679,000251: 23,2533 10000 CCS A
022680,000252: 23,2534 02542 TC DOTICK
022681,000253: 23,2535 37662 CAF PRIO25
022682,000254: 23,2536 05134 TC NOVAC # TERMINATE V 82. CANT CALL ENDEXT IN RUPT.
022683,000255: 23,2537 1044 EBANK= EXTVBACT
022684,000256: 23,2537 05534 04062 2CADR ENDEXT
022685,000257:
022686,000258: 23,2541 05324 TC TASKOVER
022687,000259: 23,2542 35041 DOTICK CAF 1SEC # RE-REQUEST TICKTEST.
022688,000260: 23,2543 05245 TC WAITLIST
022689,000261: 23,2544 E4,1743 EBANK= TFF
022690,000262: 23,2544 02531 46064 2CADR TICKTEST
022691,000263:
022692,000264: 23,2546 36214 CAF THREE
022693,000265: 23,2547 71742 MASK V82FLAGS
022694,000266: 23,2550 50000 INDEX A
022695,000267: 23,2551 02552 TC +1
022696,000268: 23,2552 05324 TC TASKOVER # IF NO FLAGBITS SET DONT CHANGE TFF OR
022697,000269: # -TPER, BUT CONTINUE LOOP.
022698,000270: 23,2553 02561 TC TPERTICK # ONLY BIT 1 SET. INCR -TPER BY 1 SEC.
022699,000271: 23,2554 35041 TFFTICK CAF 1SEC # ONLY BIT 2 SET. INCR TFF BY 1 SEC.
022700,000272: 23,2555 54001 TS L
022701,000273: 23,2556 35021 CAF ZERO
022702,000274: 23,2557 21744 DAS TFF
022703,000275: 23,2560 05324 TC TASKOVER
022704,000276: 23,2561 35041 TPERTICK CAF 1SEC
022705,000277: 23,2562 54001 TS L
022706,000278: 23,2563 35021 CAF ZERO
022707,000279: 23,2564 21746 DAS -TPER
022708,000280: 23,2565 05324 TC TASKOVER
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Page 519 |
022710,000282: 23,2566 77776 V82GON EXIT # AVERAGE G ON. USE CURRENT STATE VECTOR
022711,000283: # FOR ORBITAL PARAMETER CALCULATIONS.
022712,000284: 23,2567 35063 CAF PRIO7 # LESS THAN LAMBERT
022713,000285: 23,2570 05147 TC FINDVAC # V82GON1 WILL PERFORM ORBIT CALCULATIONS
022714,000286: 23,2571 E4,1743 EBANK= TFF # ABOUT PROPER BODY APPROX ONCE PER SEC.
022715,000287: 23,2571 02604 46064 2CADR V82GON1
022716,000288:
022717,000289: 23,2573 00003 RELINT
022718,000290: 23,2574 10067 CCS NEWJOB # WITHOLD V16 N44 UNTIL FIRST ORBIT CALC
022719,000291: 23,2575 05164 TC CHANG1 # IS DONE. NOTE: V82GON1 (PRIO7, FINDVAC
022720,000292: # JOB) IS COMPLETED BEFORE V82GON (PRIO7,
022721,000293: # NOVAC JOB).
022722,000294: 23,2576 32407 V82REDSP CAF V16N44 # MONITOR HAPO, HPER, TFF
022723,000295: 23,2577 04662 TC BANKCALL
022724,000296: 23,2600 20561 CADR GOXDSPF
022725,000297: 23,2601 05625 TC B5OFF # TERM THIS TELLS V82GON1 TO KILL ITSELF.
022726,000298: 23,2602 05625 TC B5OFF # PROC DITTO.
022727,000299: 23,2603 02576 TC V82REDSP # RECYCLE
022728,000300:
022729,000301: 23,2604 06006 V82GON1 TC INTPRET # THIS EXEC PROGRAM PERPETUATES ITSELF
022730,000302: # ONCE A SEC UNTIL BIT 5 OF EXTVBACT =0.
022731,000303: 23,2605 52175 VLOAD GOTO # HOLDS OFF CCS NEWJOB BETWEEN RN AND
022732,000304: 23,2606 01171 RN # VN FETCH SO RN, VN ARE FROM SAME
022733,000305: 23,2607 46610 NEXTLINE # STATE VECTOR UPDATE.
022734,000306: 23,2610 26327 NEXTLINE STOVL RONE # RN AT (-29)M FOR EARTH OR MOON
022735,000307: 23,2611 01177 VN
022736,000308: 23,2612 02335 STORE VONE # VN AT (-7)M/CS FOR EARTH OR MOON
022737,000309: 23,2613 52014 BON GOTO
022738,000310: 23,2614 00315 AMOONFLG # FLAG INDICATES BODY ABOUT WHICH ORBITAL
022739,000311: 23,2615 46617 MOONGON # CALCULATIONS ARE TO BE PERFORMED.
022740,000312: 23,2616 46630 EARTHGON # IF SET - MOON, IF RESET - EARTH.
022741,000313:
022742,000314: 23,2617 71214 MOONGON SET DLOAD
022743,000315: 23,2620 04462 V82EMFLG # INDICATE MOON SCALING FOR SR30.1
022744,000316: 23,2621 06454 1/RTMUM # LUNAR PARAMETERS LOADED HERE FOR SR30.1
022745,000317: 23,2622 14037 STODL TFF/RTMU
022746,000318: 23,2623 06460 MINPERM
022747,000319: 23,2624 26321 STOVL HPERMIN
022748,000320: 23,2625 02026 RLS # SCALED AT (-27)M.
022749,000321: 23,2626 52046 ABVAL GOTO
022750,000322: 23,2627 46637 V82GON2
022751,000323: 23,2630 71214 EARTHGON CLEAR DLOAD
022752,000324: 23,2631 04662 V82EMFLG # INDICATE EARTH SCALING FOR SR30.1
022753,000325: 23,2632 06456 1/RTMUE # EARTH PARAMETERS LOADED HERE FOR SR30.1
022754,000326: 23,2633 14037 STODL TFF/RTMU
022755,000327: 23,2634 06462 MINPERE
022756,000328: 23,2635 16321 STODL HPERMIN
022757,000329: 23,2636 05152 RPAD
022758,000330: 23,2637 36323 V82GON2 STCALL RPADTEM # COMMON CODE FOR EARTH & MOON.
022759,000331: 23,2640 46667 SR30.1
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Page 520 |
022761,000333: 23,2641 77776 EXIT
022762,000334: 23,2642 05364 TC CHECKMM
022763,000335: 23,2643 00013 DEC 11 B-14
022764,000336: 23,2644 02657 TC V82GON3 # NOT IN MODE 11.
022765,000337: 23,2645 06006 CANDEL TC INTPRET # IN MODE 11 OR 00
022766,000338: 23,2646 77624 CALL
022767,000339: 23,2647 27442 INTSTALL # DELRSPL DOES INTWAKE
022768,000340: 23,2650 45145 DLOAD CALL
022769,000341: 23,2651 02344 TFF
022770,000342: 23,2652 64017 DELRSPL # RETURN IS TO NEXT LINE (SPLRET).
022771,000343: 23,2653 77776 SPLRET EXIT
022772,000344:
022773,000345: 23,2654 31011 CA MODREG
022774,000346: 23,2655 00006 EXTEND
022775,000347: 23,2656 12501 BZF SPLRET1
022776,000348: 23,2657 35013 V82GON3 CAF BIT5
022777,000349: 23,2660 71044 MASK EXTVBACT # SEE IF ASTRONAUT HAS SIGNALLED TERMINATE
022778,000350: 23,2661 00006 EXTEND
022779,000351: 23,2662 15534 BZF ENDEXT # YES, TERMINATE VB 82 LOOP
022780,000352: 23,2663 35041 CAF 1SEC
022781,000353: 23,2664 04662 TC BANKCALL # WAIT ONE SECOND BEFORE REPEATING
022782,000354: 23,2665 01732 CADR DELAYJOB # ORBITAL PARAMETER COMPUTATION.
022783,000355: 23,2666 02604 TC V82GON1
022784,000356:
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022786,000358: # SUBROUTINE NAME: SR30.1
022787,000359: # MOD NO: 0 DATE: 16 FEB 67
022788,000360: # MOD BY: RR BAIRNSFATHER LOG SECTION: R32
022789,000361: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 11 APR 67 SR30.1 CHANGED TO ALLOW MONITOR OPERN
022790,000362: # MOD NO: 2 MOD BY: RR BAIRNSFATHER DATE: 14 APR 67 ADD OVFL CK FOR RAPO
022791,000363: # MOD NO: 3 MOD BY ALONSO DATE: 11 DEC 67 SUBROUTINE REWRITTEN
022792,000364: # MOD NO: 4 MOD BY ALONSO DATE: 26 MAR 68 PROG MOD TO HANDLE DIF EARTH/MOON SCALE
022793,000365: # MOD NO: 5 MOD BY: RR BAIRNSFATHER DATE: 6 AUG 68 OVFL CK FOR HAPO & HPER. VOIDS MOD #2.
022794,000366:
022795,000367: # NEW FUNCTIONAL DESCRIPTION: ORBITAL PARAMETERS DISPLAY FOR NOUNS 32 AND 44.
022796,000368: # SR30.1 CALLS TFFCONMU AND TFFRP/RA TO CALCULATE RPER (PERIGEE RADIUS),
022797,000369: # RAPO (APOGEE RADIUS), HPER (PERIGEE HEIGHT ABOVE LAUNCH PAD OR LUNAR
022798,000370: # LANDING SITE), HAPO (APOGEE HEIGHT AS ABOVE), TPER (TIME TO PERIGEE),
022799,000371: # TFF (TIME TO INTERSECT 300 KFT ABOVE PAD OR 35KFT ABOVE LANDING SITE).
022800,000372: # IF HPER IS GREATER THAN OR EQUAL TO HPERMIN, CALCULATES TPER AND STORES
022801,000373: # NEGATIVE IN -TPER. OTHERWISE STORES +0 IN -TPER. WHENEVER TPER IS
022802,000374: # CALCULATED, TFF IS NOT COMPUTABLE AND DEFAULTS TO -59MIN 59SEC. IF HAPO
022803,000375: # WOULD EXCEED 9999.9 NM, IT IS LIMITED TO THAT VALUE FOR DISPLAY.
022804,000376:
022805,000377: # ADDENDUM: HAPO AND HPER SHOULD BE CHANGED TO READ HAPOX AND HPERX IN THE
022806,000378: # ABOVE REMARKS.
022807,000379:
022808,000380: # CALLING SEQUENCE: CALL
022809,000381: # SR30.1
022810,000382:
022811,000383: # SUBROUTINES CALLED: TFFCONMU, TFFRP/RA, CALCTPER, CALCTFF
022812,000384:
022813,000385: # NORMAL EXIT MODE: CALLING LINE +1 (STILL IN INTERPRETIVE MODE)
022814,000386:
022815,000387: # ALARMS: NONE
022816,000388:
022817,000389: # OUTPUT: RAPO (-29) M EARTH APOGEE RADIUS EARTH CENTERED COORD.
022818,000390: # (-27) M MOON MOON CENTERED COORD.
022819,000391: # RPER (-29) M EARTH PERIGEE RADIUS EARTH CENTERED COORD.
022820,000392: # (-27) M MOON MOON CENTERED COORD.
022821,000393: # HAPOX (-29) M APOGEE ALTITUDE ABOVE PAD OR LAND. SITE MAX VALUE LIMITED TO 9999.9 NM.
022822,000394: # HPERX (-29) M PERIGEE ALT. ABOVE PAD OR LAND. SITE MAX VALUE LIMITED TO 9999.9 NM.
022823,000395: # TFF (-28) CS TIME TO 300KFT OR 35KFT ALTITUDE
022824,000396: # -TPER (-28) CS TIME TO PERIGEE
022825,000397:
022826,000398: # ERASABLE INITIALIZATION REQUIRED -
022827,000399: # TFF/RTMU (+17) EARTH RECIPROCAL OF PROPER GRAV CONSTANT FOR
022828,000400: # (+14) MOON EARTH OR MOON = 1/SQRT(MU).
022829,000401: # RONE (-29) M STATE VECTOR
022830,000402: # VONE (-7) M/CS STATE VECTOR
022831,000403: # RPADTEM (-29) M EARTH RADIUS OF LAUNCH PAD OR LUNAR LANDING
022832,000404: # (-27) M MOON SITE.
022833,000405: # HPERMIN (-29) M EARTH (300 OR 35) KFT MINIMUM PERIGEE ALTITUDE
022834,000406: # (-27) M MOON ABOVE LAUNCH PAD OR LUNAR LANDING SITE.
022835,000407: # V82EMFLG (INT SW BIT) RESET FOR EARTH, SET FOR MOON.
022836,000408:
022837,000409: # DEBRIS: QPRET, PDL, S2
022838,000410:
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022840,000412: 23,2667 COUNT* $$/SR30S
022841,000413:
022842,000414: 23,2667 44001 SR30.1 SETPD STQ # INITIALIZE PUSHDOWN LIST.
022843,000415: 23,2670 00001 0
022844,000416: 23,2671 00051 S2
022845,000417: # SR30.1 INPUT: RONE AT (-29)M EARTH/MOON
022846,000418: # VONE AT (-7)M/CS
022847,000419: # TFFCONMU, TFFRP/RA, CALCTPER AND CALCTFF
022848,000420: # CALLS REQUIRE:
022849,000421: # EARTH CENTERED (NO RESCALING REQUIRED)
022850,000422: # RONE SCALED TO B-29 M
022851,000423: # VONE SCALED TO B-7 M/CS
022852,000424: # MOON CENTERED (RESCALING REQUIRED)
022853,000425: # RONE SCALED TO B-27 M
022854,000426: # VONE SCALED TO B-5 M/CS
022855,000427: 23,2672 77214 BOFF VLOAD
022856,000428: 23,2673 04742 V82EMFLG # OFF FOR EARTH, ON FOR MOON.
022857,000429: 23,2674 46703 TFFCALLS
022858,000430: 23,2675 02327 RONE
022859,000431: 23,2676 77752 VSL2
022860,000432: 23,2677 26327 STOVL RONE
022861,000433: 23,2700 02335 VONE
022862,000434: 23,2701 77752 VSL2
022863,000435: 23,2702 02335 STORE VONE
022864,000436: 23,2703 77624 TFFCALLS CALL
022865,000437: 23,2704 56760 TFFCONMU
022866,000438: 23,2705 77624 CALL # TFFRP/RA COMPUTES RAPO,RPER.
022867,000439: 23,2706 57026 TFFRP/RA
022868,000440: # RETURNS WITH RAPO IN D(MPAC).
022869,000441: 23,2707 77625 DSU
022870,000442: 23,2710 02323 RPADTEM
022871,000443: 23,2711 64414 BOFF SR2R # NEED HAPO AT (-29)M FOR DISPLAY.
022872,000444: # IF MOON CENTERED, RESCALE FROM (-27)M.
022873,000445: # IF EARTH CENTERED ALREADY AT (-29)M.
022874,000446: 23,2712 04742 V82EMFLG # OFF FOR EARTH, ON FOR MOON.
022875,000447: 23,2713 46714 +1
022876,000448: 23,2714 77624 CALL # IF HAPO > MAXNM, SET HAPO =9999.9 NM.
022877,000449: 23,2715 46754 MAXCHK # OTHERWISE STORE (RAPO-RPADTEM) IN HAPO.
022878,000450: 23,2716 16352 STORHAPO STODL HAPOX
022879,000451: 23,2717 00017 RPER
022880,000452: 23,2720 77625 DSU
022881,000453: 23,2721 02323 RPADTEM # GIVES HPER AT (-29)M EARTH, (-27)M MOON.
022882,000454: 23,2722 00161 STORE MPAC +4 # SAVE THIS FOR COMPARISON TO HPERMIN.
022883,000455: 23,2723 64414 BOFF SR2R # NEED HPER AT (-29)M FOR DISPLAY.
022884,000456: # IF MOON CENTERED, RESCALE FROM (-27)M.
022885,000457: # IF EARTH CENTERED ALREADY AT (-29)M.
022886,000458: 23,2724 04742 V82EMFLG # OFF FOR EARTH, ON FOR MOON.
022887,000459: 23,2725 46726 +1
022888,000460: 23,2726 77624 CALL # IF HPER > MAXNM, SET HPER = 9999.9 NM.
022889,000461: 23,2727 46754 MAXCHK
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Page 523 |
022891,000463: 23,2730 16354 STORHPER STODL HPERX # STORE (RPER - RPADTEM) INTO HPERX.
022892,000464: 23,2731 00161 MPAC +4
022893,000465: 23,2732 51025 DSU BPL # HPERMIN AT (-29)M FOR EARTH, (-27)M MOON
022894,000466: 23,2733 02321 HPERMIN # IF HPER L/ HPERMIN (300 OR 35) KFT,
022895,000467: 23,2734 46740 DOTPER # THEN ZERO INTO -TPER.
022896,000468: 23,2735 52145 DLOAD GOTO # OTHERWISE CALCULATE TPER.
022897,000469: 23,2736 15335 HI6ZEROS
022898,000470: 23,2737 46744 SKIPTPER
022899,000471: 23,2740 45145 DOTPER DLOAD CALL
022900,000472: 23,2741 00017 RPER
022901,000473: 23,2742 57064 CALCTPER
022902,000474: 23,2743 77676 DCOMP # TPER IS PUT NEG INTO -TPER.
022903,000475: 23,2744 16346 SKIPTPER STODL -TPER
022904,000476: 23,2745 02321 HPERMIN # HPERMIN AT (-29)M FOR EARTH, (-27)M MOON
022905,000477: 23,2746 45015 DAD CALL
022906,000478: 23,2747 02323 RPADTEM # RPADTEM AT (-29)M FOR EARTH, (-27)M MOON
022907,000479: 23,2750 57067 CALCTFF # GIVES 59M59S FOR TFF IF RPER G/
022908,000480: 23,2751 77676 DCOMP # HPERMIN + RPADTEM. (TPER WAS NON ZERO)
022909,000481: 23,2752 36344 STCALL TFF # OTHERWISE COMPUTES TFF. (GOTO)
022910,000482: 23,2753 00051 S2
022911,000483:
022912,000484: 23,2754 51025 MAXCHK DSU BPL # IF C(MPAC) > 9999.9 NM, MPAC = 9999.9 NM
022913,000485: 23,2755 06764 MAXNM
022914,000486: 23,2756 46761 +3 # OTHERWISE C(MPAC) = B(MPAC).
022915,000487: 23,2757 43415 DAD RVQ
022916,000488: 23,2760 06764 MAXNM
022917,000489: 23,2761 43545 +3 DLOAD RVQ # (USED BY P30 - P37 ALSO)
022918,000490: 23,2762 06764 MAXNM
022919,000491:
022920,000492: 23,2763 01065 05603 MAXNM 2OCT 0106505603
022921,000493:
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Page 524 |
022923,000495:
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There is no source code on this page — HG 2009 |
End of include-file R30.agc. Parent file is MAIN.agc