Source Code
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These source-code files are part of a reconstructed copy of Luminary 173, the
second (unflown) release of the Apollo 14 Lunar Module (LM) Apollo Guidance
Computer (AGC) software.
The reconstruction began with reconstructed source code for Luminary 178. Changes
between revision 173 and 178 were backed out, as described by Luminary memo 167
(revision 1). The reconstruction was verified by matching memory-bank checksums
to those listed in drawing 2021152N. Note that page numbers in the reconstructed
code match those for the baseline log section mentioned in each file's changelog;
the page numbers for a real Luminary 173 listing would be different.
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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030408,000002: ## Copyright: Public domain.
030409,000003: ## Filename: R30.agc
030410,000004: ## Purpose: A section of Luminary revision 173.
030411,000005: ## It is part of the reconstructed source code for the second
030412,000006: ## (unflown) release of the flight software for the Lunar
030413,000007: ## Module's (LM) Apollo Guidance Computer (AGC) for Apollo 14.
030414,000008: ## The code has been recreated from a reconstructed copy of
030415,000009: ## Luminary 178, as well as Luminary memo 167 (revision 1).
030416,000010: ## It has been adapted such that the resulting bugger words
030417,000011: ## exactly match those specified for Luminary 173 in NASA
030418,000012: ## drawing 2021152N, which gives relatively high confidence
030419,000013: ## that the reconstruction is correct.
030420,000014: ## Reference: pp. 706-716
030421,000015: ## Assembler: yaYUL
030422,000016: ## Contact: Ron Burkey <info@sandroid.org>.
030423,000017: ## Website: www.ibiblio.org/apollo/index.html
030424,000018: ## Mod history: 2019-09-18 MAS Created from Luminary 178.
030425,000019: ## 2021-05-30 ABS TICKTIFF -> TICKTFF
030426,000020:
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Page 706
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030428,000022: # SUBROUTINE NAME: V82CALL
030429,000023: # MOD NO: 0 DATE: 16 FEB 67
030430,000024: # MOD BY: RR BAIRNSFATHER LOG SECTION: R30
030431,000025: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 11 APR 67 SR30.1 CHANGED TO ALLOW MONITOR OPERN
030432,000026: # MOD NO: 2 MOD BY ALONSO DATE : 11 DEC 67 VB82 PROGRAM REWRITTEN
030433,000027: # MOD NO: 3 MOD BY ALONSO DATE: 26 MAR 68 PROG MOD TO HANDLE DIF EARTH/MOON SCALE
030434,000028: # NEW FUNCTIONAL DESCRIPTION: CALLED BY VERB 82 ENTER. PRIORITY 10
030435,000029: # USED THROUGHOUT. CALCULATE AND DISPLAY ORBITAL PARAMETERS
030436,000030:
030437,000031: # 1. IF AVERAGE G IS OFF:
030438,000032: # FLASH DISPLAY V04N06. R2 INDICATES WHICH SHIP'S STATE VECTOR IS
030439,000033: # TO BE UPDATED. INITIAL CHOICE IS THIS SHIP (R2=1). ASTRONAUT
030440,000034: # CAN CHANGE TO OTHER SHIP BY V22EXE, WHERE X NOT EQ 1.
030441,000035: # SELECTED STATE VECTOR UPDATED BY THISPREC (OTHPREC).
030442,000036: # CALLS SR30.1 (WHICH CALLS TFFCONMU + TFFRP/RA) TO CALCULATE
030443,000037: # RPER (PERIGEE RADIUS), RAPO (APOGEE RADIUS), HPER (PERIGEE
030444,000038: # HEIGHT ABOVE LAUNCH PAD OR LUNAR LANDING SITE), HAPO (APOGEE
030445,000039: # HEIGHT AS ABOVE), TPER (TIME TO PERIGEE), TFF (TIME TO
030446,000040: # INTERSECT 300 KFT ABOVE PAD OR 35KFT ABOVE LANDING SITE).
030447,000041: # FLASH MONITOR V16N44 (HAPO, HPER, TFF).TFF IS -59M59S IF IT WAS
030448,000042: # NOT COMPUTABLE, OTHERWISE IT INCREMENTS ONCE PER SECOND.
030449,000043: # ASTRONAUT HAS OPTION TO MONITOR TPER BY KEYING IN N 32 E.
030450,000044: # DISPLAY IS IN HMS, IS NEGATIVE (AS WAS TFF), AND INCREMENTS
030451,000045: # ONCE PER SECOND ONLY IF TFF DISPLAY WAS -59M59S.
030452,000046:
030453,000047: # 2. IF AVERAGE G IS ON:
030454,000048: # CALLS SR30.1 APPROX EVERY TWO SECS. STATE VECTOR IS ALWAYS
030455,000049: # FOR THIS VEHICLE. V82 DOES NOT DISTURB STATE VECTOR. RESULTS
030456,000050: # OF SR30.1 ARE RAPO, RPER, HAPO, HPER, TPER, TFF.
030457,000051: # FLASH MONITOR V16N44 (HAPO, HPER, TFF).
030458,000052: # ADDENDUM: HAPO AND HPER SHOULD BE CHANGED TO READ HAPOX AND HPERX IN THE
030459,000053: # ABOVE REMARKS.
030460,000054:
030461,000055: # CALLING SEQUENCE: VERB 82 ENTER.
030462,000056:
030463,000057:
030464,000058: # SUBROUTINES CALLED: SR30.1, GOXDSPF
030465,000059: # MAYBE - THISPREC , OTHPREC, LOADTIME, DELRSPL
030466,000060: # NORMAL EXIT MODES: TC ENDEXT
030467,000061:
030468,000062: # ALARMS: NONE
030469,000063:
030470,000064: # OUTPUT: HAPOX (-29) M
030471,000065: # HPERX (-29) M
030472,000066: # RAPO (-29) M EARTH
030473,000067: # (-27) M MOON
030474,000068: # RPER (-29) M EARTH
030475,000069: # (-27) M MOON
030476,000070: # TFF (-28) CS CONTAINS NEGATIVE QUANTITY
030477,000071: # -TPER (-28) CS CONTAINS NEGATIVE QUANTITY
030478,000072:
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Page 707
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030480,000074:
030481,000075: # ERASABLE INITIALIZATION REQUIRED: STATE VECTOR.
030482,000076:
030483,000077: # DEBRIS: QPRET, RONE, VONE,TFF/RTMU, HPERMIN, RPADTEM, V82EMFLG.
030484,000078: # MAYBE: TSTART82, V82FLAGS, TDEC1.
030485,000079:
030486,000080:
030487,000081: 13,2347 E4,1517 EBANK= HAPOX
030488,000082: 31,2144 BANK 31
030489,000083: 22,2000 SETLOC R30LOC
030490,000084: 22,2000 BANK
030491,000085: 22,3242 COUNT* $$/R30
030492,000086:
030493,000087: 22,3242 06042 V82CALL TC INTPRET
030494,000088: 22,3243 52014 BON GOTO
030495,000089: 22,3244 03712 AVEGFLAG
030496,000090: 22,3245 45465 V82GON # IF AVERAGE G ON
030497,000091: 22,3246 45247 V82GOFF # IF AVERAGE G OFF
030498,000092:
030499,000093:
030500,000094: 22,3247 77776 V82GOFF EXIT # ALLOW ASTRONAUT TO SELECT VEHICLE
030501,000095: 22,3250 34752 CAF TWO # DESIRED FOR ORBITAL PARAMETERS
030502,000096: 22,3251 55050 TS OPTIONX # CALCULATION AND DISPLAY.
030503,000097: 22,3252 34753 CAF ONE
030504,000098: 22,3253 55051 TS OPTIONX +1
030505,000099: 22,3254 33316 CAF OPTIONVN # V 04 N 06
030506,000100: 22,3255 04616 TC BANKCALL
030507,000101: 22,3256 20334 CADR GOXDSPF
030508,000102: 22,3257 05503 TC ENDEXT # TERMINATE
030509,000103: 22,3260 03262 TC +2 # PROCEED
030510,000104: 22,3261 03254 TC -5 # DATA IN. OPTION1+1 = 1 FOR THIS VEHICLE.
030511,000105: # UNEQ 1 FOR OTHER VEHICLE.
030512,000106: 22,3262 34750 CAF BIT4 # 80 MS
030513,000107: 22,3263 05214 TC WAITLIST
030514,000108: 22,3264 E4,1540 EBANK= TFF
030515,000109: 22,3264 03430 44064 2CADR TICKTEST
030516,000110:
030517,000111: 22,3266 00003 RELINT
030518,000112: 22,3267 33320 V82GOFLP CAF TFFBANK # MAJOR RECYCLE LOOP ENTRY
030519,000113: 22,3270 54003 TS EBANK
030520,000114: 22,3271 34755 CAF ZERO
030521,000115: 22,3272 55537 TS V82FLAGS # ZERO FLAGS FOR TICKTEST. INHIBITS
030522,000116: # DECREMENTING OF TFF AND -TPER.
030523,000117: 22,3273 35021 CAF PRIO7
030524,000118: 22,3274 05105 TC FINDVAC # V82GOFF1 WILL EXECUTE STATE VECTOR
030525,000119: 22,3275 E4,1540 EBANK= TFF # UPDATE AND ORBIT CALCULATIONS FOR
030526,000120: 22,3275 03321 44064 2CADR V82GOFF1 # SELECTED VEHICLE ABOUT PROPER BODY.
030527,000121:
030528,000122: 22,3277 00003 RELINT
030529,000123: 22,3300 36250 V82STALL CAF THREE # STALL IN THIS LOOP AND WITHOLD V 16 N 44
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Page 708
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030531,000125: 22,3301 71537 MASK V82FLAGS # UNTIL STATE VECTOR UPDATE SETS ONE OF
030532,000126: 22,3302 10000 CCS A # OUR FLAG BITS.
030533,000127: 22,3303 03310 TC FLAGGON # EXIT FROM STALL LOOP.
030534,000128: 22,3304 34777 CAF 1SEC
030535,000129: 22,3305 04616 TC BANKCALL
030536,000130: 22,3306 01736 CADR DELAYJOB
030537,000131: 22,3307 03300 TC V82STALL
030538,000132:
030539,000133: 22,3310 33317 FLAGGON CAF V16N44 # MONITOR HAPO,HPER,TFF.
030540,000134: 22,3311 04616 TC BANKCALL
030541,000135: 22,3312 20334 CADR GOXDSPF
030542,000136: 22,3313 05574 TC B5OFF # TERM THIS TELLS TICKTEST TO KILL ITSELF
030543,000137: 22,3314 05574 TC B5OFF # PROCEED DITTO
030544,000138: 22,3315 03267 TC V82GOFLP # RECYCLE RECOMPUTE STATE VECT + DISPLAY
030545,000139:
030546,000140: 22,3316 01014 OPTIONVN VN 412
030547,000141: 22,3317 04054 V16N44 VN 1644
030548,000142: 22,3320 02140 TFFBANK ECADR TFF
030549,000143:
030550,000144:
030551,000145: 22,3321 06042 V82GOFF1 TC INTPRET
030552,000146: 22,3322 77634 RTB
030553,000147: 22,3323 21574 LOADTIME
030554,000148: 22,3324 00041 STORE TDEC1 # TIME FOR STATE VECTOR UPDATE.
030555,000149: 22,3325 02205 STORE TSTART82 # TIME FOR INTERNAL USE.
030556,000150: 22,3326 77776 EXIT
030557,000151: 22,3327 41051 CS OPTIONX +1 # 1 FOR THIS VEHICLE, NOT 1 FOR OTHER.
030558,000152: 22,3330 64753 AD ONE
030559,000153: 22,3331 00006 EXTEND
030560,000154: 22,3332 13356 BZF THISSHIP
030561,000155: 22,3333 06042 OTHSHIP TC INTPRET
030562,000156: 22,3334 77624 CALL # CALL STATE VECTOR UPDATE FOR OTHER SHIP.
030563,000157: 22,3335 27042 OTHPREC
030564,000158: 22,3336 77775 BOTHSHIP VLOAD # MOVE RESULTS INTO TFFCONIC STORAGE AREAS
030565,000159: 22,3337 00001 RATT # TO BE CALLED BY SR30.1.
030566,000160: 22,3340 26207 STOVL RONE # RATT AT (-29)M FOR EARTH OR MOON
030567,000161: 22,3341 00007 VATT
030568,000162: 22,3342 02215 STORE VONE # VATT AT (-7)M/CS FOR EARTH OR MOON
030569,000163: 22,3343 77743 DLOAD*
030570,000164: 22,3344 73774 1/RTMUE,2 # X2 IS 0 FOR EARTH CENTERED STATE VEC
030571,000165: 22,3345 00037 STORE TFF/RTMU # X2 IS 2 FOR MOON
030572,000166: 22,3346 77743 DLOAD* # AS LEFT BY THISPREC OR OTHPREC.
030573,000167: 22,3347 72411 MINPERE,2
030574,000168: 22,3350 02201 STORE HPERMIN # TFFRTMU, HPERMIN AND RPADTEM ARE ALL
030575,000169: 22,3351 46135 SLOAD BHIZ # EARTH/MOON PARAMETERS AS SET HERE.
030576,000170: 22,3352 00050 X2
030577,000171: 22,3353 45367 EARTHPAD
030578,000172: 22,3354 77650 GOTO
030579,000173: 22,3355 45373 MOONPAD
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Page 709
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030581,000175: 22,3356 06042 THISSHIP TC INTPRET
030582,000176: 22,3357 77624 CALL # CALL STATE VECTOR UPDATE FOR THIS SHIP.
030583,000177: 22,3360 27056 THISPREC
030584,000178: 22,3361 77650 GOTO
030585,000179: 22,3362 45336 BOTHSHIP
030586,000180:
030587,000181: # THE FOLLOWING CONSTANTS ARE PAIRWISE INDEXED. DO NOT SEPARATE PAIRS.
030588,000182:
030589,000183: 22,3363 00001 11530 MINPERM 2DEC 10668 B-27 # 35 KFT MIN PERIGEE HEIGHT FOR MOON(-27)M
030590,000184:
030591,000185: 22,3365 00002 31230 MINPERE 2DEC 91440 B-29 # 300 KFT (-29)M FOR EARTH
030592,000186:
030593,000187: 22,3367 43145 EARTHPAD DLOAD CLRGO # PAD 37-B RADIUS. SCALED AT (-29)M.
030594,000188: 22,3370 06334 RPAD
030595,000189: 22,3371 03635 V82EMFLG # INDICATE EARTH SCALING FOR SR30.1
030596,000190: 22,3372 45377 BOTHPAD
030597,000191:
030598,000192: 22,3373 51575 MOONPAD VLOAD ABVAL # COMPUTE MOON PAD RADIUS FROM RLS VECTOR.
030599,000193: 22,3374 02021 RLS # SCALED AT (-27)M.
030600,000194: 22,3375 77614 SET
030601,000195: 22,3376 03475 V82EMFLG # INDICATE MOON SCALING FOR SR30.1
030602,000196: 22,3377 36203 BOTHPAD STCALL RPADTEM
030603,000197: 22,3400 45551 SR30.1 # CALCULATE ORBITAL PARAMETERS
030604,000198: 22,3401 45234 RTB DSU
030605,000199: 22,3402 21574 LOADTIME
030606,000200: 22,3403 02205 TSTART82 # PRESENT TIME - TIME V82GOFF1 BEGAN
030607,000201: 22,3404 02205 STORE TSTART82 # SAVE IT
030608,000202: 22,3405 53145 DLOAD BZE # SR30.1 SETS -TPER=0 IF HPER L/
030609,000203: 22,3406 02143 -TPER # HPERMIN (300 OR 35) KFT.
030610,000204: 22,3407 45420 TICKTFF # (-TPER = 0)
030611,000205: 22,3410 43345 TICKTPER DLOAD DAD # (-TPER NON ZERO) TFF WAS NOT COMPUTED,
030612,000206: 22,3411 02143 -TPER # BUT WAS SET TO 59M59S.DONT TICK TFF, DO
030613,000207: 22,3412 02205 TSTART82 # TICK -TPER. DISPLAY BOTH.
030614,000208: 22,3413 02143 STORE -TPER # -TPER CORRECTED FOR TIME SINCE V82GOFF1
030615,000209: 22,3414 77776 EXIT # BEGAN.
030616,000210: 22,3415 34753 CAF BIT1
030617,000211: 22,3416 55537 TS V82FLAGS # INFORMS TICKTEST TO INCREMENT ONLY -TPER
030618,000212: 22,3417 05155 TC ENDOFJOB
030619,000213:
030620,000214: 22,3420 43345 TICKTFF DLOAD DAD # (-TPER=0) TFF WAS COMPUTED.TICK TFF.
030621,000215: 22,3421 02141 TFF # DO NOT TICK -TPER.DISPLAY TFF, BUT NOT
030622,000216: 22,3422 02205 TSTART82 # -TPER.
030623,000217: 22,3423 02141 STORE TFF # TFF CORRECTED FOR TIME SINCE V82GOFF1
030624,000218: 22,3424 77776 EXIT # BEGAN.
030625,000219: 22,3425 34752 CAF BIT2
030626,000220: 22,3426 55537 TS V82FLAGS # INFORMS TICKTEST TO INCREMENT ONLY TFF.
030627,000221: 22,3427 05155 TC ENDOFJOB
030628,000222:
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Page 710
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030630,000224: 22,3430 34747 TICKTEST CAF BIT5 # THIS WAITLIST PROGRAM PERPETUATES ITSELF
030631,000225: 22,3431 71043 MASK EXTVBACT # ONCE A SEC UNTIL BIT 5 OF EXTVBACT =0.
030632,000226: 22,3432 10000 CCS A
030633,000227: 22,3433 03441 TC DOTICK
030634,000228: 22,3434 37716 CAF PRIO25
030635,000229: 22,3435 05072 TC NOVAC # TERMINATE V 82.CANT CALL ENDEXT IN RUPT.
030636,000230: 22,3436 1043 EBANK= EXTVBACT
030637,000231: 22,3436 05503 04062 2CADR ENDEXT
030638,000232:
030639,000233: 22,3440 05272 TC TASKOVER
030640,000234: 22,3441 34777 DOTICK CAF 1SEC # RE-REQUEST TICKTEST.
030641,000235: 22,3442 05214 TC WAITLIST
030642,000236: 22,3443 E4,1540 EBANK= TFF
030643,000237: 22,3443 03430 44064 2CADR TICKTEST
030644,000238:
030645,000239: 22,3445 36250 CAF THREE
030646,000240: 22,3446 71537 MASK V82FLAGS
030647,000241: 22,3447 50000 INDEX A
030648,000242: 22,3450 03451 TC +1
030649,000243: 22,3451 05272 TC TASKOVER # IF NO FLAGBITS SET DONT CHANGE TFF OR
030650,000244: # -TPER, BUT CONTINUE LOOP.
030651,000245: 22,3452 03460 TC TPERTICK # ONLY BIT 1 SET. INCR -TPER BY 1 SEC.
030652,000246: 22,3453 34777 TFFTICK CAF 1SEC # ONLY BIT 2 SET. INCR TFF BY 1 SEC.
030653,000247: 22,3454 54001 TS L
030654,000248: 22,3455 34755 CAF ZERO
030655,000249: 22,3456 21541 DAS TFF
030656,000250: 22,3457 05272 TC TASKOVER
030657,000251: 22,3460 34777 TPERTICK CAF 1SEC
030658,000252: 22,3461 54001 TS L
030659,000253: 22,3462 34755 CAF ZERO
030660,000254: 22,3463 21543 DAS -TPER
030661,000255: 22,3464 05272 TC TASKOVER
030662,000256:
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Page 711
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030664,000258: 22,3465 77776 V82GON EXIT # AVERAGE G ON. USE CURRENT STATE VECTOR
030665,000259: # FOR ORBITAL PARAMETER CALCULATIONS.
030666,000260: 22,3466 35021 CAF PRIO7 # LESS THAN LAMBERT
030667,000261: 22,3467 05105 TC FINDVAC # V82GON1 WILL PERFORM ORBIT CALCULATIONS
030668,000262: 22,3470 E4,1540 EBANK= TFF # ABOUT PROPER BODY APPROX ONCE PER SEC.
030669,000263: 22,3470 03503 44064 2CADR V82GON1
030670,000264:
030671,000265: 22,3472 00003 RELINT
030672,000266: 22,3473 10067 CCS NEWJOB # WITHOLD V16 N44 UNTIL FIRST ORBIT CALC
030673,000267: 22,3474 05122 TC CHANG1 # IS DONE. NOTE: V82GON1 (PRIO7, FINDVAC
030674,000268: # JOB) IS COMPLETED BEFORE V82GON (PRIO7,
030675,000269: # NOVAC JOB).
030676,000270: 22,3475 33317 V82REDSP CAF V16N44 # MONITOR HAPO, HPER, TFF
030677,000271: 22,3476 04616 TC BANKCALL
030678,000272: 22,3477 20334 CADR GOXDSPF
030679,000273: 22,3500 05574 TC B5OFF # TERM THIS TELLS V82GON1 TO KILL ITSELF.
030680,000274: 22,3501 05574 TC B5OFF # PROC DITTO.
030681,000275: 22,3502 03475 TC V82REDSP # RECYCLE
030682,000276:
030683,000277: 22,3503 06042 V82GON1 TC INTPRET # THIS EXEC PROGRAM PERPETUATES ITSELF
030684,000278: # ONCE A SEC UNTIL BIT 5 OF EXTVBACT =0.
030685,000279: 22,3504 52175 VLOAD GOTO # HOLDS OFF CCS NEWJOB BETWEEN RN AND
030686,000280: 22,3505 01220 RN # VN FETCH SO RN , VN ARE FROM SAME
030687,000281: 22,3506 45507 NEXTLINE # STATE VECTOR UPDATE.
030688,000282: 22,3507 26207 NEXTLINE STOVL RONE # RN AT (-29)M FOR EARTH OR MOON
030689,000283: 22,3510 01226 VN
030690,000284: 22,3511 02215 STORE VONE # VN AT (-7)M/CS FOR EARTH OR MOON
030691,000285: 22,3512 52014 BON GOTO
030692,000286: 22,3513 04304 MOONTHIS # FLAG INDICATES BODY ABOUT WHICH ORBITAL
030693,000287: 22,3514 45516 MOONGON # CALCULATIONS ARE TO BE PERFORMED.
030694,000288: 22,3515 45527 EARTHGON # IF SET - MOON , IF RESET - EARTH.
030695,000289:
030696,000290: 22,3516 71214 MOONGON SET DLOAD
030697,000291: 22,3517 03475 V82EMFLG # INDICATE MOON SCALING FOR SR30.1
030698,000292: 22,3520 04001 1/RTMUM # LUNAR PARAMETERS LOADED HERE FOR SR30.1
030699,000293: 22,3521 14037 STODL TFF/RTMU
030700,000294: 22,3522 05364 MINPERM
030701,000295: 22,3523 26201 STOVL HPERMIN
030702,000296: 22,3524 02021 RLS # SCALED AT (-27)M.
030703,000297: 22,3525 52046 ABVAL GOTO
030704,000298: 22,3526 45536 V82GON2
030705,000299: 22,3527 71214 EARTHGON CLEAR DLOAD
030706,000300: 22,3530 03675 V82EMFLG # INDICATE EARTH SCALING FOR SR30.1
030707,000301: 22,3531 04003 1/RTMUE # EARTH PARAMETERS LOADED HERE FOR SR30.1
030708,000302: 22,3532 14037 STODL TFF/RTMU
030709,000303: 22,3533 05366 MINPERE
030710,000304: 22,3534 16201 STODL HPERMIN
030711,000305: 22,3535 06334 RPAD
030712,000306: 22,3536 36203 V82GON2 STCALL RPADTEM # COMMON CODE FOR EARTH & MOON.
030713,000307: 22,3537 45551 SR30.1
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Page 712
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030715,000309: 22,3540 77776 EXIT
030716,000310: 22,3541 34747 V82GON3 CAF BIT5
030717,000311: 22,3542 71043 MASK EXTVBACT # SEE IF ASTRONAUT HAS SIGNALLED TERMINATE
030718,000312: 22,3543 00006 EXTEND
030719,000313: 22,3544 15503 BZF ENDEXT # YES, TERMINATE VB 82 LOOP
030720,000314: 22,3545 34777 CAF 1SEC
030721,000315: 22,3546 04616 TC BANKCALL # WAIT ONE SECOND BEFORE REPEATING
030722,000316: 22,3547 01736 CADR DELAYJOB # ORBITAL PARAMETER COMPUTATION.
030723,000317: 22,3550 03503 TC V82GON1
030724,000318:
030725,000319: 22,3551 22,3541 SPLRET = V82GON3
030726,000320:
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Page 713
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030728,000322: # SUBROUTINE NAME: SR30.1
030729,000323: # MOD NO: 0 DATE: 16 FEB 67
030730,000324: # MOD BY: RR BAIRNSFATHER LOG SECTION: R32
030731,000325: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 11 APR 67 SR30.1 CHANGED TO ALLOW MONITOR OPERN
030732,000326: # MOD NO: 2 MOD BY: RR BAIRNSFATHER DATE: 14 APR 67 ADD OVFL CK FOR RAPO
030733,000327: # MOD NO: 3 MOD BY ALONSO DATE: 11 DEC 67 SUBROUTINE REWRITTEN
030734,000328: # MOD NO: 4 MOD BY ALONSO DATE: 26 MAR 68 PROG MOD TO HANDLE DIF EARTH/MOON SCALE
030735,000329: # MOD NO: 5 MOD BY: RR BAIRNSFATHER DATE: 6 AUG 68 OVFL CK FOR HAPO & HPER.VOIDS MOD #2.
030736,000330:
030737,000331: # NEW FUNCTIONAL DESCRIPTION: ORBITAL PARAMETERS DISPLAY FOR NOUNS 32 AND 44.
030738,000332: # SR30.1 CALLS TFFCONMU AND TFFRP/RA TO CALCULATE RPER (PERIGEE RADIUS),
030739,000333: # RAPO (APOGEE RADIUS), HPER (PERIGEE HEIGHT ABOVE LAUNCH PAD OR LUNAR
030740,000334: # LANDING SITE), HAPO (APOGEE HEIGHT AS ABOVE), TPER (TIME TO PERIGEE),
030741,000335: # TFF (TIME TO INTERSECT 300 KFT ABOVE PAD OR 35KFT ABOVE LANDING SITE).
030742,000336: # IF HPER IS GREATER THAN OR EQUAL TO HPERMIN, CALCULATES TPER AND STORES
030743,000337: # NEGATIVE IN -TPER. OTHERWISE STORES +0 IN -TPER. WHENEVER TPER IS
030744,000338: # CALCULATED, TFF IS NOT COMPUTABLE AND DEFAULTS TO -59MIN 59SEC. IF HAPO
030745,000339: # WOULD EXCEED 9999.9 NM, IT IS LIMITED TO THAT VALUE FOR DISPLAY.
030746,000340:
030747,000341: # ADDENDUM: HAPO AND HPER SHOULD BE CHANGED TO READ HAPOX AND HPERX IN THE
030748,000342: # ABOVE REMARKS.
030749,000343:
030750,000344: # CALLING SEQUENCE: CALL
030751,000345: # SR30.1
030752,000346: # SUBROUTINES CALLED: TFFCONMU, TFFRP/RA, CALCTPER, CALCTFF
030753,000347: # NORMAL EXIT MODE: CALLING LINE +1 (STILL IN INTERPRETIVE MODE)
030754,000348: # ALARMS: NONE
030755,000349: # OUTPUT: RAPO (-29) M EARTH APOGEE RADIUS EARTH CENTERED COORD.
030756,000350: # (-27) M MOON MOON CENTERED COORD.
030757,000351: # RPER (-29) M EARTH PERIGEE RADIUS EARTH CENTERED COORD.
030758,000352: # (-27) M MOON MOON CENTERED COORD.
030759,000353: # HAPOX (-29) M APOGEE ALTITUDE ABOVE PAD OR LAND. SITE MAX VALUE LIMITED TO 9999.9 NM.
030760,000354: # HPERX (-29) M PERIGEE ALT. ABOVE PAD OR LAND. SITE MAX VALUE LIMITED TO 9999.9 NM.
030761,000355: # TFF (-28) CS TIME TO 300KFT OR 35KFT ALTITUDE
030762,000356: # -TPER (-28) CS TIME TO PERIGEE
030763,000357: # ERASABLE INITIALIZATION REQUIRED-
030764,000358: # TFF/RTMU (+17) EARTH RECIPROCAL OF PROPER GRAV CONSTANT FOR
030765,000359: # (+14) MOON EARTH OR MOON = 1/SQRT(MU).
030766,000360: # RONE (-29) M STATE VECTOR
030767,000361: # VONE (-7) M/CS STATE VECTOR
030768,000362: # RPADTEM (-29) M EARTH RADIUS OF LAUNCH PAD OR LUNAR LANDING
030769,000363: # (-27) M MOON SITE.
030770,000364: # HPERMIN (-29) M EARTH (300 OR 35)KFT MINIMUM PERIGEE ALTITUDE
030771,000365: # (-27) M MOON ABOVE LAUNCH PAD OR LUNAR LANDING SITE.
030772,000366: # V82EMFLG (INT SW BIT) RESET FOR EARTH, SET FOR MOON.
030773,000367:
030774,000368: # DEBRIS: QPRET, PDL, S2
030775,000369:
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Page 714
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030777,000371: 22,3551 COUNT* $$/SR30S
030778,000372:
030779,000373: 22,3551 44001 SR30.1 SETPD STQ # INITIALIZE PUSHDOWN LIST.
030780,000374: 22,3552 00001 0
030781,000375: 22,3553 00051 S2
030782,000376: # SR30.1 INPUT: RONE AT (-29)M EARTH/MOON
030783,000377: # VONE AT (-7)M/CS
030784,000378: # TFFCONMU,TFFRP/RA,CALCTPER AND CALCTFF
030785,000379: # CALLS REQUIRE :
030786,000380: # EARTH CENTERED (NO RESCALING REQUIRED)
030787,000381: # RONE SCALED TO B-29 M
030788,000382: # VONE SCALED TO B-7 M/CS
030789,000383: # MOON CENTERED (RESCALING REQUIRED)
030790,000384: # RONE SCALED TO B-27 M
030791,000385: # VONE SCALED TO B-5 M/CS
030792,000386: 22,3554 77214 BOFF VLOAD
030793,000387: 22,3555 03755 V82EMFLG # OFF FOR EARTH , ON FOR MOON.
030794,000388: 22,3556 45565 TFFCALLS
030795,000389: 22,3557 02207 RONE
030796,000390: 22,3560 77752 VSL2
030797,000391: 22,3561 26207 STOVL RONE
030798,000392: 22,3562 02215 VONE
030799,000393: 22,3563 77752 VSL2
030800,000394: 22,3564 02215 STORE VONE
030801,000395: 22,3565 77624 TFFCALLS CALL
030802,000396: 22,3566 57360 TFFCONMU
030803,000397: 22,3567 77624 CALL # TFFRP/RA COMPUTES RAPO,RPER.
030804,000398: 22,3570 57426 TFFRP/RA
030805,000399: # RETURNS WITH RAPO IN D(MPAC).
030806,000400: 22,3571 77625 DSU
030807,000401: 22,3572 02203 RPADTEM
030808,000402: 22,3573 64414 BOFF SR2R # NEED HAPO AT (-29)M FOR DISPLAY.
030809,000403: # IF MOON CENTERED, RESCALE FROM (-27)M.
030810,000404: # IF EARTH CENTERED ALREADY AT (-29)M.
030811,000405: 22,3574 03755 V82EMFLG # OFF FOR EARTH , ON FOR MOON.
030812,000406: 22,3575 45576 +1
030813,000407: 22,3576 77624 CALL # IF HAPO > MAXNM, SET HAPO =9999.9 NM.
030814,000408: 22,3577 45636 MAXCHK # OTHERWISE STORE (RAPO-RPADTEM) IN HAPO.
030815,000409: 22,3600 16120 STORHAPO STODL HAPOX
030816,000410: 22,3601 00017 RPER
030817,000411: 22,3602 77625 DSU
030818,000412: 22,3603 02203 RPADTEM # GIVES HPER AT (-29)M EARTH, (-27)M MOON.
030819,000413: 22,3604 00161 STORE MPAC +4 # SAVE THIS FOR COMPARISON TO HPERMIN.
030820,000414: 22,3605 64414 BOFF SR2R # NEED HPER AT (-29)M FOR DISPLAY.
030821,000415: # IF MOON CENTERED, RESCALE FROM (-27)M.
030822,000416: # IF EARTH CENTERED ALREADY AT (-29)M.
030823,000417: 22,3606 03755 V82EMFLG # OFF FOR EARTH, ON FOR MOON.
030824,000418: 22,3607 45610 +1
030825,000419: 22,3610 77624 CALL # IF HPER > MAXNM, SET HPER = 9999.9 NM.
030826,000420: 22,3611 45636 MAXCHK
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Page 715
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030828,000422: 22,3612 16122 STORHPER STODL HPERX # STORE (RPER - RPADTEM) INTO HPERX.
030829,000423: 22,3613 00161 MPAC +4
030830,000424: 22,3614 51025 DSU BPL # HPERMIN AT (-29)M FOR EARTH, (-27)M MOON
030831,000425: 22,3615 02201 HPERMIN # IF HPER L/ HPERMIN (300 OR 35)KFT,
030832,000426: 22,3616 45622 DOTPER # THEN ZERO INTO -TPER.
030833,000427: 22,3617 52145 DLOAD GOTO # OTHERWISE CALCULATE TPER.
030834,000428: 22,3620 06520 HI6ZEROS
030835,000429: 22,3621 45626 SKIPTPER
030836,000430: 22,3622 45145 DOTPER DLOAD CALL
030837,000431: 22,3623 00017 RPER
030838,000432: 22,3624 57464 CALCTPER
030839,000433: 22,3625 77676 DCOMP # TPER IS PUT NEG INTO -TPER.
030840,000434: 22,3626 16143 SKIPTPER STODL -TPER
030841,000435: 22,3627 02201 HPERMIN # HPERMIN AT (-29)M FOR EARTH, (-27)M MOON
030842,000436: 22,3630 45015 DAD CALL
030843,000437: 22,3631 02203 RPADTEM # RPADTEM AT (-29)M FOR EARTH, (-27)M MOON
030844,000438: 22,3632 57467 CALCTFF # GIVES 59M59S FOR TFF IF RPER G/
030845,000439: 22,3633 77676 DCOMP # HPERMIN + RPADTEM. (TPER WAS NON ZERO)
030846,000440: 22,3634 36141 STCALL TFF # OTHERWISE COMPUTES TFF. (GOTO)
030847,000441: 22,3635 00051 S2
030848,000442:
030849,000443: 22,3636 51025 MAXCHK DSU BPL # IF C(MPAC) > 9999.9 NM, MPAC = 9999.9 NM
030850,000444: 22,3637 05646 MAXNM
030851,000445: 22,3640 45643 +3 # OTHERWISE C(MPAC) = B(MPAC).
030852,000446: 22,3641 43415 DAD RVQ
030853,000447: 22,3642 05646 MAXNM
030854,000448: 22,3643 43545 +3 DLOAD RVQ # (USED BY P30 - P37 ALSO)
030855,000449: 22,3644 05646 MAXNM
030856,000450:
030857,000451: 22,3645 01065 05603 MAXNM 2OCT 0106505603
030858,000452:
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Page 716
This page of the original assembly-listing hardcopy was empty, except for messages generated by the assembler.
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End of include-file R30.agc. Parent file is MAIN.agc