Notations on the program listing read, in part:
GAP: ASSEMBLE REVISION 116 OF AGC PROGRAM LUMINARY BY NASA 2021112-071 19:09 AUG. 11,1969Note that the date is the date of the printout, not the date of the program revision.
Source Code
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These source-code files derive from a printout of Luminary 116 (the Apollo 12
Lunar Module guidance computer program), from the personal library of
original AGC developer Don Eyles, digitally photographed at archive.org,
financially sponsored by Ron Burkey, and transcribed to source code by a
team of volunteers. This colorized, syntax-highlighted form was created
by assembling that transcribed source code. Note that the full page images
are available on the
Virtual AGC project page at archive.org, while reduced-size images
are presented at the VirtualAGC project website. Report or fix any
transcription errors at
the Virtual AGC project code repository. Notations on the program listing read, in part: GAP: ASSEMBLE REVISION 116 OF AGC PROGRAM LUMINARY BY NASA 2021112-071 19:09 AUG. 11,1969Note that the date is the date of the printout, not the date of the program revision. |
030288,000002: ## Copyright: Public domain.
030289,000003: ## Filename: R30.agc
030290,000004: ## Purpose: A section of Luminary revision 116.
030291,000005: ## It is part of the source code for the Lunar Module's (LM)
030292,000006: ## Apollo Guidance Computer (AGC) for Apollo 12.
030293,000007: ## This file is intended to be a faithful transcription, except
030294,000008: ## that the code format has been changed to conform to the
030295,000009: ## requirements of the yaYUL assembler rather than the
030296,000010: ## original YUL assembler.
030297,000011: ## Reference: pp. 712-722
030298,000012: ## Assembler: yaYUL
030299,000013: ## Contact: Ron Burkey <info@sandroid.org>.
030300,000014: ## Website: www.ibiblio.org/apollo/index.html
030301,000015: ## Mod history: 2017-01-22 MAS Created from Luminary 99.
030302,000016: ## 2017-02-08 RSB Comment-text fixes discovered while proofing Artemis 72.
030303,000017: ## 2017-03-09 RSB Transcribed, and then proofed comment-text using
030304,000018: ## 3-way diff vs Luminary 99 and Luminary 131.
030305,000019: ## (Admittedly, the former is more for detecting errors
030306,000020: ## in Luminary 99 than the other way around.)
030307,000021: ## 2017-03-16 RSB Comment-text fixes identified in 5-way
030308,000022: ## side-by-side diff of Luminary 69/99/116/131/210.
030309,000023: ## 2017-03-17 RSB Comment-text fixes identified in diff'ing
030310,000024: ## Luminary 99 vs Comanche 55.
030311,000025: ## 2021-05-30 ABS TICKTIFF -> TICKTFF
030312,000026:
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Page 712 |
030314,000028: # SUBROUTINE NAME: V82CALL
030315,000029: # MOD NO: 0 DATE: 16 FEB 67
030316,000030: # MOD BY: RR BAIRNSFATHER LOG SECTION: R30
030317,000031: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 11 APR 67 SR30.1 CHANGED TO ALLOW MONITOR OPERN
030318,000032: # MOD NO: 2 MOD BY ALONSO DATE: 11 DEC 67 VB82 PROGRAM REWRITTEN
030319,000033: # MOD NO: 3 MOD BY ALONSO DATE: 26 MAR 68 PROG MOD TO HANDLE DIF EARTH/MOON SCALE
030320,000034:
030321,000035: # NEW FUNCTIONAL DESCRIPTION: CALLED BY VERB 82 ENTER. PRIORITY 10
030322,000036: # USED THROUGHOUT. CALCULATE AND DISPLAY ORBITAL PARAMETERS
030323,000037:
030324,000038: # 1. IF AVERAGE G IS OFF:
030325,000039: # FLASH DISPLAY V04N06. R2 INDICATES WHICH SHIP'S STATE VECTOR IS
030326,000040: # TO BE UPDATED. INITIAL CHOICE IS THIS SHIP (R2=1). ASTRONAUT
030327,000041: # CAN CHANGE TO OTHER SHIP BY V22EXE, WHERE X NOT EQ 1.
030328,000042: # SELECTED STATE VECTOR UPDATED BY THISPREC (OTHPREC).
030329,000043: # CALLS SR30.1 (WHICH CALLS TFFCONMU + TFFRP/RA) TO CALCULATE
030330,000044: # RPER (PERIGEE RADIUS), RAPO (APOGEE RADIUS), HPER (PERIGEE
030331,000045: # HEIGHT ABOVE LAUNCH PAD OR LUNAR LANDING SITE), HAPO (APOGEE
030332,000046: # HEIGHT AS ABOVE), TPER (TIME TO PERIGEE), TFF (TIME TO
030333,000047: # INTERSECT 300 KFT ABOVE PAD OR 35KFT ABOVE LANDING SITE).
030334,000048: # FLASH MONITOR V16N44 (HAPO, HPER, TFF). TFF IS -59M59S IF IT WAS
030335,000049: # NOT COMPUTABLE, OTHERWISE IT INCREMENTS ONCE PER SECOND.
030336,000050: # ASTRONAUT HAS OPTION TO MONITOR TPER BY KEYING IN N 32 E.
030337,000051: # DISPLAY IS IN HMS, IS NEGATIVE (AS WAS TFF), AND INCREMENTS
030338,000052: # ONCE PER SECOND ONLY IF TFF DISPLAY WAS -59M59S.
030339,000053: # 2. IF AVERAGE G IS ON:
030340,000054: # CALLS SR30.1 APPROX EVERY TWO SECS. STATE VECTOR IS ALWAYS
030341,000055: # FOR THIS VEHICLE. V82 DOES NOT DISTURB STATE VECTOR. RESULTS
030342,000056: # OF SR30.1 ARE RAPO, RPER, HAPO, HPER, TPER, TFF.
030343,000057: # FLASH MONITOR V16N44 (HAPO, HPER, TFF).
030344,000058: # ADDENDUM: HAPO AND HPER SHOULD BE CHANGED TO READ HAPOX AND HPERX IN THE
030345,000059: # ABOVE REMARKS.
030346,000060:
030347,000061: # CALLING SEQUENCE: VERB 82 ENTER.
030348,000062:
030349,000063: # SUBROUTINES CALLED: SR30.1, GOXDSPF
030350,000064: # MAYBE - THISPREC, OTHPREC, LOADTIME, DELRSPL
030351,000065:
030352,000066: # NORMAL EXIT MODES: TC ENDEXT
030353,000067:
030354,000068: # ALARMS: NONE
030355,000069:
030356,000070: # OUTPUT: HAPOX (-29) M
030357,000071: # HPERX (-29) M
030358,000072: # RAPO (-29) M EARTH
030359,000073: # (-27) M MOON
030360,000074: # RPER (-29) M EARTH
030361,000075: # (-27) M MOON
030362,000076: # TFF (-28) CS CONTAINS NEGATIVE QUANTITY
030363,000077: # -TPER (-28) CS CONTAINS NEGATIVE QUANTITY
030364,000078:
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Page 713 |
030366,000080: # ERASABLE INITIALIZATION REQUIRED: STATE VECTOR.
030367,000081:
030368,000082: # DEBRIS: QPRET, RONE, VONE, TFF/RTMU, HPERMIN, RPADTEM, V82EMFLG.
030369,000083: # MAYBE: TSTART82, V82FLAGS, TDEC1.
030370,000084:
030371,000085: 13,2351 E4,1517 EBANK= HAPOX
030372,000086: 31,2144 BANK 31
030373,000087: 22,2000 SETLOC R30LOC
030374,000088: 22,2000 BANK
030375,000089: 22,3242 COUNT* $$/R30
030376,000090:
030377,000091: 22,3242 06042 V82CALL TC INTPRET
030378,000092: 22,3243 52014 BON GOTO
030379,000093: 22,3244 03712 AVEGFLAG
030380,000094: 22,3245 45465 V82GON # IF AVERAGE G ON
030381,000095: 22,3246 45247 V82GOFF # IF AVERAGE G OFF
030382,000096:
030383,000097: 22,3247 77776 V82GOFF EXIT # ALLOW ASTRONAUT TO SELECT VEHICLE
030384,000098: 22,3250 34752 CAF TWO # DESIRED FOR ORBITAL PARAMETERS
030385,000099: 22,3251 55050 TS OPTIONX # CALCULATION AND DISPLAY.
030386,000100: 22,3252 34753 CAF ONE
030387,000101: 22,3253 55051 TS OPTIONX +1
030388,000102: 22,3254 33316 CAF OPTIONVN # V 04 N 06
030389,000103: 22,3255 04616 TC BANKCALL
030390,000104: 22,3256 20334 CADR GOXDSPF
030391,000105: 22,3257 05472 TC ENDEXT # TERMINATE
030392,000106: 22,3260 03262 TC +2 # PROCEED
030393,000107: 22,3261 03254 TC -5 # DATA IN. OPTION1+1 = 1 FOR THIS VEHICLE.
030394,000108: # UNEQ 1 FOR OTHER VEHICLE.
030395,000109: 22,3262 34750 CAF BIT4 # 80 MS
030396,000110: 22,3263 05203 TC WAITLIST
030397,000111: 22,3264 E4,1540 EBANK= TFF
030398,000112: 22,3264 03430 44064 2CADR TICKTEST
030399,000113:
030400,000114: 22,3266 00003 RELINT
030401,000115: 22,3267 33320 V82GOFLP CAF TFFBANK # MAJOR RECYCLE LOOP ENTRY
030402,000116: 22,3270 54003 TS EBANK
030403,000117: 22,3271 34755 CAF ZERO
030404,000118: 22,3272 55537 TS V82FLAGS # ZERO FLAGS FOR TICKTEST. INHIBITS
030405,000119: # DECREMENTING OF TFF AND -TPER.
030406,000120: 22,3273 35021 CAF PRIO7
030407,000121: 22,3274 05105 TC FINDVAC # V82GOFF1 WILL EXECUTE STATE VECTOR
030408,000122: 22,3275 E4,1540 EBANK= TFF # UPDATE AND ORBIT CALCULATIONS FOR
030409,000123: 22,3275 03321 44064 2CADR V82GOFF1 # SELECTED VEHICLE ABOUT PROPER BODY.
030410,000124:
030411,000125: 22,3277 00003 RELINT
030412,000126: 22,3300 36250 V82STALL CAF THREE # STALL IN THIS LOOP AND WITHOLD V 16 N 44
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Page 714 |
030414,000128: 22,3301 71537 MASK V82FLAGS # UNTIL STATE VECTOR UPDATE SETS ONE OF
030415,000129: 22,3302 10000 CCS A # OUR FLAG BITS.
030416,000130: 22,3303 03310 TC FLAGGON # EXIT FROM STALL LOOP.
030417,000131: 22,3304 34777 CAF 1SEC
030418,000132: 22,3305 04616 TC BANKCALL
030419,000133: 22,3306 01736 CADR DELAYJOB
030420,000134: 22,3307 03300 TC V82STALL
030421,000135:
030422,000136: 22,3310 33317 FLAGGON CAF V16N44 # MONITOR HAPO,HPER,TFF.
030423,000137: 22,3311 04616 TC BANKCALL
030424,000138: 22,3312 20334 CADR GOXDSPF
030425,000139: 22,3313 05563 TC B5OFF # TERM THIS TELLS TICKTEST TO KILL ITSELF
030426,000140: 22,3314 05563 TC B5OFF # PROCEED DITTO
030427,000141: 22,3315 03267 TC V82GOFLP # RECYCLE RECOMPUTE STATE VECT + DISPLAY
030428,000142:
030429,000143: 22,3316 01014 OPTIONVN VN 412
030430,000144: 22,3317 04054 V16N44 VN 1644
030431,000145: 22,3320 02140 TFFBANK ECADR TFF
030432,000146:
030433,000147: 22,3321 06042 V82GOFF1 TC INTPRET
030434,000148: 22,3322 77634 RTB
030435,000149: 22,3323 21574 LOADTIME
030436,000150: 22,3324 00041 STORE TDEC1 # TIME FOR STATE VECTOR UPDATE.
030437,000151: 22,3325 02205 STORE TSTART82 # TIME FOR INTERNAL USE.
030438,000152: 22,3326 77776 EXIT
030439,000153: 22,3327 41051 CS OPTIONX +1 # 1 FOR THIS VEHICLE, NOT 1 FOR OTHER.
030440,000154: 22,3330 64753 AD ONE
030441,000155: 22,3331 00006 EXTEND
030442,000156: 22,3332 13356 BZF THISSHIP
030443,000157: 22,3333 06042 OTHSHIP TC INTPRET
030444,000158: 22,3334 77624 CALL # CALL STATE VECTOR UPDATE FOR OTHER SHIP.
030445,000159: 22,3335 27044 OTHPREC
030446,000160: 22,3336 77775 BOTHSHIP VLOAD # MOVE RESULTS INTO TFFCONIC STORAGE AREAS
030447,000161: 22,3337 00001 RATT # TO BE CALLED BY SR30.1.
030448,000162: 22,3340 26207 STOVL RONE # RATT AT (-29)M FOR EARTH OR MOON
030449,000163: 22,3341 00007 VATT
030450,000164: 22,3342 02215 STORE VONE # VATT AT (-7)M/CS FOR EARTH OR MOON
030451,000165: 22,3343 77743 DLOAD*
030452,000166: 22,3344 73774 1/RTMUE,2 # X2 IS 0 FOR EARTH CENTERED STATE VEC
030453,000167: 22,3345 00037 STORE TFF/RTMU # X2 IS 2 FOR MOON
030454,000168: 22,3346 77743 DLOAD* # AS LEFT BY THISPREC OR OTHPREC.
030455,000169: 22,3347 72411 MINPERE,2
030456,000170: 22,3350 02201 STORE HPERMIN # TFFRTMU, HPERMIN AND RPADTEM ARE ALL
030457,000171: 22,3351 46135 SLOAD BHIZ # EARTH/MOON PARAMETERS AS SET HERE.
030458,000172: 22,3352 00050 X2
030459,000173: 22,3353 45367 EARTHPAD
030460,000174: 22,3354 77650 GOTO
030461,000175: 22,3355 45373 MOONPAD
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Page 715 |
030463,000177: 22,3356 06042 THISSHIP TC INTPRET
030464,000178: 22,3357 77624 CALL # CALL STATE VECTOR UPDATE FOR THIS SHIP.
030465,000179: 22,3360 27060 THISPREC
030466,000180: 22,3361 77650 GOTO
030467,000181: 22,3362 45336 BOTHSHIP
030468,000182:
030469,000183: # THE FOLLOWING CONSTANTS ARE PAIRWISE INDEXED. DO NOT SEPARATE PAIRS.
030470,000184:
030471,000185: 22,3363 00001 11530 MINPERM 2DEC 10668 B-27 # 35 KFT MIN PERIGEE HEIGHT FOR MOON(-27)M
030472,000186:
030473,000187: 22,3365 00002 31230 MINPERE 2DEC 91440 B-29 # 300 KFT (-29)M FOR EARTH
030474,000188:
030475,000189: 22,3367 43145 EARTHPAD DLOAD CLRGO # PAD 37-B RADIUS. SCALED AT (-29)M.
030476,000190: 22,3370 06340 RPAD
030477,000191: 22,3371 03635 V82EMFLG # INDICATE EARTH SCALING FOR SR30.1
030478,000192: 22,3372 45377 BOTHPAD
030479,000193:
030480,000194: 22,3373 51575 MOONPAD VLOAD ABVAL # COMPUTE MOON PAD RADIUS FROM RLS VECTOR.
030481,000195: 22,3374 02023 RLS # SCALED AT (-27)M.
030482,000196: 22,3375 77614 SET
030483,000197: 22,3376 03475 V82EMFLG # INDICATE MOON SCALING FOR SR30.1
030484,000198: 22,3377 36203 BOTHPAD STCALL RPADTEM
030485,000199: 22,3400 45551 SR30.1 # CALCULATE ORBITAL PARAMETERS
030486,000200: 22,3401 45234 RTB DSU
030487,000201: 22,3402 21574 LOADTIME
030488,000202: 22,3403 02205 TSTART82 # PRESENT TIME - TIME V82GOFF1 BEGAN
030489,000203: 22,3404 02205 STORE TSTART82 # SAVE IT
030490,000204: 22,3405 53145 DLOAD BZE # SR30.1 SETS -TPER=0 IF HPER L/
030491,000205: 22,3406 02143 -TPER # HPERMIN (300 OR 35) KFT.
030492,000206: 22,3407 45420 TICKTFF # (-TPER = 0)
030493,000207: 22,3410 43345 TICKTPER DLOAD DAD # (-TPER NON ZERO) TFF WAS NOT COMPUTED,
030494,000208: 22,3411 02143 -TPER # BUT WAS SET TO 59M59S. DONT TICK TFF, DO
030495,000209: 22,3412 02205 TSTART82 # TICK -TPER. DISPLAY BOTH.
030496,000210: 22,3413 02143 STORE -TPER # -TPER CORRECTED FOR TIME SINCE V82GOFF1
030497,000211: 22,3414 77776 EXIT # BEGAN.
030498,000212: 22,3415 34753 CAF BIT1
030499,000213: 22,3416 55537 TS V82FLAGS # INFORMS TICKTEST TO INCREMENT ONLY -TPER
030500,000214: 22,3417 05155 TC ENDOFJOB
030501,000215:
030502,000216: 22,3420 43345 TICKTFF DLOAD DAD # (-TPER=0) TFF WAS COMPUTED. TICK TFF.
030503,000217: 22,3421 02141 TFF # DO NOT TICK -TPER. DISPLAY TFF, BUT NOT
030504,000218: 22,3422 02205 TSTART82 # -TPER.
030505,000219: 22,3423 02141 STORE TFF # TFF CORRECTED FOR TIME SINCE V82GOFF1
030506,000220: 22,3424 77776 EXIT # BEGAN.
030507,000221: 22,3425 34752 CAF BIT2
030508,000222: 22,3426 55537 TS V82FLAGS # INFORMS TICKTEST TO INCREMENT ONLY TFF.
030509,000223: 22,3427 05155 TC ENDOFJOB
030510,000224:
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Page 716 |
030512,000226: 22,3430 34747 TICKTEST CAF BIT5 # THIS WAITLIST PROGRAM PERPETUATES ITSELF
030513,000227: 22,3431 71043 MASK EXTVBACT # ONCE A SEC UNTIL BIT 5 OF EXTVBACT =0.
030514,000228: 22,3432 10000 CCS A
030515,000229: 22,3433 03441 TC DOTICK
030516,000230: 22,3434 37716 CAF PRIO25
030517,000231: 22,3435 05072 TC NOVAC # TERMINATE V 82. CANT CALL ENDEXT IN RUPT.
030518,000232: 22,3436 1043 EBANK= EXTVBACT
030519,000233: 22,3436 05472 04062 2CADR ENDEXT
030520,000234:
030521,000235: 22,3440 05261 TC TASKOVER
030522,000236: 22,3441 34777 DOTICK CAF 1SEC # RE-REQUEST TICKTEST.
030523,000237: 22,3442 05203 TC WAITLIST
030524,000238: 22,3443 E4,1540 EBANK= TFF
030525,000239: 22,3443 03430 44064 2CADR TICKTEST
030526,000240:
030527,000241: 22,3445 36250 CAF THREE
030528,000242: 22,3446 71537 MASK V82FLAGS
030529,000243: 22,3447 50000 INDEX A
030530,000244: 22,3450 03451 TC +1
030531,000245: 22,3451 05261 TC TASKOVER # IF NO FLAGBITS SET DONT CHANGE TFF OR
030532,000246: # -TPER, BUT CONTINUE LOOP.
030533,000247: 22,3452 03460 TC TPERTICK # ONLY BIT 1 SET. INCR -TPER BY 1 SEC.
030534,000248: 22,3453 34777 TFFTICK CAF 1SEC # ONLY BIT 2 SET. INCR TFF BY 1 SEC.
030535,000249: 22,3454 54001 TS L
030536,000250: 22,3455 34755 CAF ZERO
030537,000251: 22,3456 21541 DAS TFF
030538,000252: 22,3457 05261 TC TASKOVER
030539,000253: 22,3460 34777 TPERTICK CAF 1SEC
030540,000254: 22,3461 54001 TS L
030541,000255: 22,3462 34755 CAF ZERO
030542,000256: 22,3463 21543 DAS -TPER
030543,000257: 22,3464 05261 TC TASKOVER
030544,000258:
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Page 717 |
030546,000260: 22,3465 77776 V82GON EXIT # AVERAGE G ON. USE CURRENT STATE VECTOR
030547,000261: # FOR ORBITAL PARAMETER CALCULATIONS.
030548,000262: 22,3466 35021 CAF PRIO7 # LESS THAN LAMBERT
030549,000263: 22,3467 05105 TC FINDVAC # V82GON1 WILL PERFORM ORBIT CALCULATIONS
030550,000264: 22,3470 E4,1540 EBANK= TFF # ABOUT PROPER BODY APPROX ONCE PER SEC.
030551,000265: 22,3470 03503 44064 2CADR V82GON1
030552,000266:
030553,000267: 22,3472 00003 RELINT
030554,000268: 22,3473 10067 CCS NEWJOB # WITHOLD V16 N44 UNTIL FIRST ORBIT CALC
030555,000269: 22,3474 05122 TC CHANG1 # IS DONE. NOTE: V82GON1 (PRIO7, FINDVAC
030556,000270: # JOB) IS COMPLETED BEFORE V82GON (PRIO7,
030557,000271: # NOVAC JOB).
030558,000272: 22,3475 33317 V82REDSP CAF V16N44 # MONITOR HAPO, HPER, TFF
030559,000273: 22,3476 04616 TC BANKCALL
030560,000274: 22,3477 20334 CADR GOXDSPF
030561,000275: 22,3500 05563 TC B5OFF # TERM THIS TELLS V82GON1 TO KILL ITSELF.
030562,000276: 22,3501 05563 TC B5OFF # PROC DITTO.
030563,000277: 22,3502 03475 TC V82REDSP # RECYCLE
030564,000278:
030565,000279: 22,3503 06042 V82GON1 TC INTPRET # THIS EXEC PROGRAM PERPETUATES ITSELF
030566,000280: # ONCE A SEC UNTIL BIT 5 OF EXTVBACT =0.
030567,000281: 22,3504 52175 VLOAD GOTO # HOLDS OFF CCS NEWJOB BETWEEN RN AND
030568,000282: 22,3505 01220 RN # VN FETCH SO RN, VN ARE FROM SAME
030569,000283: 22,3506 45507 NEXTLINE # STATE VECTOR UPDATE.
030570,000284: 22,3507 26207 NEXTLINE STOVL RONE # RN AT (-29)M FOR EARTH OR MOON
030571,000285: 22,3510 01226 VN
030572,000286: 22,3511 02215 STORE VONE # VN AT (-7)M/CS FOR EARTH OR MOON
030573,000287: 22,3512 52014 BON GOTO
030574,000288: 22,3513 04304 MOONTHIS # FLAG INDICATES BODY ABOUT WHICH ORBITAL
030575,000289: 22,3514 45516 MOONGON # CALCULATIONS ARE TO BE PERFORMED.
030576,000290: 22,3515 45527 EARTHGON # IF SET - MOON, IF RESET - EARTH.
030577,000291:
030578,000292: 22,3516 71214 MOONGON SET DLOAD
030579,000293: 22,3517 03475 V82EMFLG # INDICATE MOON SCALING FOR SR30.1
030580,000294: 22,3520 04001 1/RTMUM # LUNAR PARAMETERS LOADED HERE FOR SR30.1
030581,000295: 22,3521 14037 STODL TFF/RTMU
030582,000296: 22,3522 05364 MINPERM
030583,000297: 22,3523 26201 STOVL HPERMIN
030584,000298: 22,3524 02023 RLS # SCALED AT (-27)M.
030585,000299: 22,3525 52046 ABVAL GOTO
030586,000300: 22,3526 45536 V82GON2
030587,000301: 22,3527 71214 EARTHGON CLEAR DLOAD
030588,000302: 22,3530 03675 V82EMFLG # INDICATE EARTH SCALING FOR SR30.1
030589,000303: 22,3531 04003 1/RTMUE # EARTH PARAMETERS LOADED HERE FOR SR30.1
030590,000304: 22,3532 14037 STODL TFF/RTMU
030591,000305: 22,3533 05366 MINPERE
030592,000306: 22,3534 16201 STODL HPERMIN
030593,000307: 22,3535 06340 RPAD
030594,000308: 22,3536 36203 V82GON2 STCALL RPADTEM # COMMON CODE FOR EARTH & MOON.
030595,000309: 22,3537 45551 SR30.1
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Page 718 |
030597,000311: 22,3540 77776 EXIT
030598,000312: 22,3541 34747 V82GON3 CAF BIT5
030599,000313: 22,3542 71043 MASK EXTVBACT # SEE IF ASTRONAUT HAS SIGNALLED TERMINATE
030600,000314: 22,3543 00006 EXTEND
030601,000315: 22,3544 15472 BZF ENDEXT # YES, TERMINATE VB 82 LOOP
030602,000316: 22,3545 34777 CAF 1SEC
030603,000317: 22,3546 04616 TC BANKCALL # WAIT ONE SECOND BEFORE REPEATING
030604,000318: 22,3547 01736 CADR DELAYJOB # ORBITAL PARAMETER COMPUTATION.
030605,000319: 22,3550 03503 TC V82GON1
030606,000320:
030607,000321: 22,3551 22,3541 SPLRET = V82GON3
030608,000322:
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Page 719 |
030610,000324: # SUBROUTINE NAME: SR30.1
030611,000325: # MOD NO: 0 DATE: 16 FEB 67
030612,000326: # MOD BY: RR BAIRNSFATHER LOG SECTION: R32
030613,000327: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 11 APR 67 SR30.1 CHANGED TO ALLOW MONITOR OPERN
030614,000328: # MOD NO: 2 MOD BY: RR BAIRNSFATHER DATE: 14 APR 67 ADD OVFL CK FOR RAPO
030615,000329: # MOD NO: 3 MOD BY ALONSO DATE: 11 DEC 67 SUBROUTINE REWRITTEN
030616,000330: # MOD NO: 4 MOD BY ALONSO DATE: 26 MAR 68 PROG MOD TO HANDLE DIF EARTH/MOON SCALE
030617,000331: # MOD NO: 5 MOD BY: RR BAIRNSFATHER DATE: 6 AUG 68 OVFL CK FOR HAPO & HPER. VOIDS MOD #2.
030618,000332:
030619,000333: # NEW FUNCTIONAL DESCRIPTION: ORBITAL PARAMETERS DISPLAY FOR NOUNS 32 AND 44.
030620,000334: # SR30.1 CALLS TFFCONMU AND TFFRP/RA TO CALCULATE RPER (PERIGEE RADIUS),
030621,000335: # RAPO (APOGEE RADIUS), HPER (PERIGEE HEIGHT ABOVE LAUNCH PAD OR LUNAR
030622,000336: # LANDING SITE), HAPO (APOGEE HEIGHT AS ABOVE), TPER (TIME TO PERIGEE),
030623,000337: # TFF (TIME TO INTERSECT 300 KFT ABOVE PAD OR 35KFT ABOVE LANDING SITE).
030624,000338: # IF HPER IS GREATER THAN OR EQUAL TO HPERMIN, CALCULATES TPER AND STORES
030625,000339: # NEGATIVE IN -TPER. OTHERWISE STORES +0 IN -TPER. WHENEVER TPER IS
030626,000340: # CALCULATED, TFF IS NOT COMPUTABLE AND DEFAULTS TO -59MIN 59SEC. IF HAPO
030627,000341: # WOULD EXCEED 9999.9 NM, IT IS LIMITED TO THAT VALUE FOR DISPLAY.
030628,000342:
030629,000343: # ADDENDUM: HAPO AND HPER SHOULD BE CHANGED TO READ HAPOX AND HPERX IN THE
030630,000344: # ABOVE REMARKS.
030631,000345:
030632,000346: # CALLING SEQUENCE: CALL
030633,000347: # SR30.1
030634,000348:
030635,000349: # SUBROUTINES CALLED: TFFCONMU, TFFRP/RA, CALCTPER, CALCTFF
030636,000350:
030637,000351: # NORMAL EXIT MODE: CALLING LINE +1 (STILL IN INTERPRETIVE MODE)
030638,000352:
030639,000353: # ALARMS: NONE
030640,000354:
030641,000355: # OUTPUT: RAPO (-29) M EARTH APOGEE RADIUS EARTH CENTERED COORD.
030642,000356: # (-27) M MOON MOON CENTERED COORD.
030643,000357: # RPER (-29) M EARTH PERIGEE RADIUS EARTH CENTERED COORD.
030644,000358: # (-27) M MOON MOON CENTERED COORD.
030645,000359: # HAPOX (-29) M APOGEE ALTITUDE ABOVE PAD OR LAND. SITE MAX VALUE LIMITED TO 9999.9 NM.
030646,000360: # HPERX (-29) M PERIGEE ALT. ABOVE PAD OR LAND. SITE MAX VALUE LIMITED TO 9999.9 NM.
030647,000361: # TFF (-28) CS TIME TO 300KFT OR 35KFT ALTITUDE
030648,000362: # -TPER (-28) CS TIME TO PERIGEE
030649,000363:
030650,000364: # ERASABLE INITIALIZATION REQUIRED -
030651,000365: # TFF/RTMU (+17) EARTH RECIPROCAL OF PROPER GRAV CONSTANT FOR
030652,000366: # (+14) MOON EARTH OR MOON = 1/SQRT(MU).
030653,000367: # RONE (-29) M STATE VECTOR
030654,000368: # VONE (-7) M/CS STATE VECTOR
030655,000369: # RPADTEM (-29) M EARTH RADIUS OF LAUNCH PAD OR LUNAR LANDING
030656,000370: # (-27) M MOON SITE.
030657,000371: # HPERMIN (-29) M EARTH (300 OR 35) KFT MINIMUM PERIGEE ALTITUDE
030658,000372: # (-27) M MOON ABOVE LAUNCH PAD OR LUNAR LANDING SITE.
030659,000373: # V82EMFLG (INT SW BIT) RESET FOR EARTH, SET FOR MOON.
030660,000374:
030661,000375: # DEBRIS: QPRET, PDL, S2
030662,000376:
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Page 720 |
030664,000378: 22,3551 COUNT* $$/SR30S
030665,000379:
030666,000380: 22,3551 44001 SR30.1 SETPD STQ # INITIALIZE PUSHDOWN LIST.
030667,000381: 22,3552 00001 0
030668,000382: 22,3553 00051 S2
030669,000383: # SR30.1 INPUT: RONE AT (-29)M EARTH/MOON
030670,000384: # VONE AT (-7)M/CS
030671,000385: # TFFCONMU, TFFRP/RA, CALCTPER AND CALCTFF
030672,000386: # CALLS REQUIRE:
030673,000387: # EARTH CENTERED (NO RESCALING REQUIRED)
030674,000388: # RONE SCALED TO B-29 M
030675,000389: # VONE SCALED TO B-7 M/CS
030676,000390: # MOON CENTERED (RESCALING REQUIRED)
030677,000391: # RONE SCALED TO B-27 M
030678,000392: # VONE SCALED TO B-5 M/CS
030679,000393: 22,3554 77214 BOFF VLOAD
030680,000394: 22,3555 03755 V82EMFLG # OFF FOR EARTH, ON FOR MOON.
030681,000395: 22,3556 45565 TFFCALLS
030682,000396: 22,3557 02207 RONE
030683,000397: 22,3560 77752 VSL2
030684,000398: 22,3561 26207 STOVL RONE
030685,000399: 22,3562 02215 VONE
030686,000400: 22,3563 77752 VSL2
030687,000401: 22,3564 02215 STORE VONE
030688,000402: 22,3565 77624 TFFCALLS CALL
030689,000403: 22,3566 57361 TFFCONMU
030690,000404: 22,3567 77624 CALL # TFFRP/RA COMPUTES RAPO,RPER.
030691,000405: 22,3570 57427 TFFRP/RA
030692,000406: # RETURNS WITH RAPO IN D(MPAC).
030693,000407: 22,3571 77625 DSU
030694,000408: 22,3572 02203 RPADTEM
030695,000409: 22,3573 64414 BOFF SR2R # NEED HAPO AT (-29)M FOR DISPLAY.
030696,000410: # IF MOON CENTERED, RESCALE FROM (-27)M.
030697,000411: # IF EARTH CENTERED ALREADY AT (-29)M.
030698,000412: 22,3574 03755 V82EMFLG # OFF FOR EARTH, ON FOR MOON.
030699,000413: 22,3575 45576 +1
030700,000414: 22,3576 77624 CALL # IF HAPO > MAXNM, SET HAPO =9999.9 NM.
030701,000415: 22,3577 45636 MAXCHK # OTHERWISE STORE (RAPO-RPADTEM) IN HAPO.
030702,000416: 22,3600 16120 STORHAPO STODL HAPOX
030703,000417: 22,3601 00017 RPER
030704,000418: 22,3602 77625 DSU
030705,000419: 22,3603 02203 RPADTEM # GIVES HPER AT (-29)M EARTH, (-27)M MOON.
030706,000420: 22,3604 00161 STORE MPAC +4 # SAVE THIS FOR COMPARISON TO HPERMIN.
030707,000421: 22,3605 64414 BOFF SR2R # NEED HPER AT (-29)M FOR DISPLAY.
030708,000422: # IF MOON CENTERED, RESCALE FROM (-27)M.
030709,000423: # IF EARTH CENTERED ALREADY AT (-29)M.
030710,000424: 22,3606 03755 V82EMFLG # OFF FOR EARTH, ON FOR MOON.
030711,000425: 22,3607 45610 +1
030712,000426: 22,3610 77624 CALL # IF HPER > MAXNM, SET HPER = 9999.9 NM.
030713,000427: 22,3611 45636 MAXCHK
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Page 721 |
030715,000429: 22,3612 16122 STORHPER STODL HPERX # STORE (RPER - RPADTEM) INTO HPERX.
030716,000430: 22,3613 00161 MPAC +4
030717,000431: 22,3614 51025 DSU BPL # HPERMIN AT (-29)M FOR EARTH, (-27)M MOON
030718,000432: 22,3615 02201 HPERMIN # IF HPER L/ HPERMIN (300 OR 35) KFT,
030719,000433: 22,3616 45622 DOTPER # THEN ZERO INTO -TPER.
030720,000434: 22,3617 52145 DLOAD GOTO # OTHERWISE CALCULATE TPER.
030721,000435: 22,3620 06524 HI6ZEROS
030722,000436: 22,3621 45626 SKIPTPER
030723,000437: 22,3622 45145 DOTPER DLOAD CALL
030724,000438: 22,3623 00017 RPER
030725,000439: 22,3624 57465 CALCTPER
030726,000440: 22,3625 77676 DCOMP # TPER IS PUT NEG INTO -TPER.
030727,000441: 22,3626 16143 SKIPTPER STODL -TPER
030728,000442: 22,3627 02201 HPERMIN # HPERMIN AT (-29)M FOR EARTH, (-27)M MOON
030729,000443: 22,3630 45015 DAD CALL
030730,000444: 22,3631 02203 RPADTEM # RPADTEM AT (-29)M FOR EARTH, (-27)M MOON
030731,000445: 22,3632 57470 CALCTFF # GIVES 59M59S FOR TFF IF RPER G/
030732,000446: 22,3633 77676 DCOMP # HPERMIN + RPADTEM. (TPER WAS NON ZERO)
030733,000447: 22,3634 36141 STCALL TFF # OTHERWISE COMPUTES TFF. (GOTO)
030734,000448: 22,3635 00051 S2
030735,000449:
030736,000450: 22,3636 51025 MAXCHK DSU BPL # IF C(MPAC) > 9999.9 NM, MPAC = 9999.9 NM
030737,000451: 22,3637 05646 MAXNM
030738,000452: 22,3640 45643 +3 # OTHERWISE C(MPAC) = B(MPAC).
030739,000453: 22,3641 43415 DAD RVQ
030740,000454: 22,3642 05646 MAXNM
030741,000455: 22,3643 43545 +3 DLOAD RVQ # (USED BY P30 - P37 ALSO)
030742,000456: 22,3644 05646 MAXNM
030743,000457:
030744,000458: 22,3645 01065 05603 MAXNM 2OCT 0106505603
030745,000459:
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030748,000462:
End of include-file R30.agc. Parent file is MAIN.agc