Source Code
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These source-code files are part of a reconstructed copy of Luminary 178, the
final release of the Apollo 14 Lunar Module (LM) Apollo Guidance Computer
(AGC) software.
The reconstruction began with source code of Zerlina 56, Luminary 210, and
Luminary 131, previously transcribed from digitized copies of those programs.
The code was created by combining the three, using Zerlina 56 as a base, since
it was based off of Luminary 183. The differences between the three were
carefully merged using the Luminary memos as a guide, with all changes made
after Luminary 178 being backed out. 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 178 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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030470,000002: ## Copyright: Public domain.
030471,000003: ## Filename: R30.agc
030472,000004: ## Purpose: A section of Luminary revision 178.
030473,000005: ## It is part of the reconstructed source code for the final
030474,000006: ## release of the flight software for the Lunar Module's
030475,000007: ## (LM) Apollo Guidance Computer (AGC) for Apollo 14. The
030476,000008: ## code has been recreated from copies of Zerlina 56, Luminary
030477,000009: ## 210, and Luminary 131, as well as many Luminary memos.
030478,000010: ## It has been adapted such that the resulting bugger words
030479,000011: ## exactly match those specified for Luminary 178 in NASA
030480,000012: ## drawing 2021152N, which gives relatively high confidence
030481,000013: ## that the reconstruction is correct.
030482,000014: ## Reference: pp. 706-716
030483,000015: ## Assembler: yaYUL
030484,000016: ## Contact: Ron Burkey <info@sandroid.org>.
030485,000017: ## Website: www.ibiblio.org/apollo/index.html
030486,000018: ## Mod history: 2019-08-14 MAS Created from Zerlina 56.
030487,000019: ## 2021-05-30 ABS TICKTIFF -> TICKTFF
030488,000020:
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Page 706
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030490,000022: # SUBROUTINE NAME: V82CALL
030491,000023: # MOD NO: 0 DATE: 16 FEB 67
030492,000024: # MOD BY: RR BAIRNSFATHER LOG SECTION: R30
030493,000025: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 11 APR 67 SR30.1 CHANGED TO ALLOW MONITOR OPERN
030494,000026: # MOD NO: 2 MOD BY ALONSO DATE : 11 DEC 67 VB82 PROGRAM REWRITTEN
030495,000027: # MOD NO: 3 MOD BY ALONSO DATE: 26 MAR 68 PROG MOD TO HANDLE DIF EARTH/MOON SCALE
030496,000028: # NEW FUNCTIONAL DESCRIPTION: CALLED BY VERB 82 ENTER. PRIORITY 10
030497,000029: # USED THROUGHOUT. CALCULATE AND DISPLAY ORBITAL PARAMETERS
030498,000030:
030499,000031: # 1. IF AVERAGE G IS OFF:
030500,000032: # FLASH DISPLAY V04N06. R2 INDICATES WHICH SHIP'S STATE VECTOR IS
030501,000033: # TO BE UPDATED. INITIAL CHOICE IS THIS SHIP (R2=1). ASTRONAUT
030502,000034: # CAN CHANGE TO OTHER SHIP BY V22EXE, WHERE X NOT EQ 1.
030503,000035: # SELECTED STATE VECTOR UPDATED BY THISPREC (OTHPREC).
030504,000036: # CALLS SR30.1 (WHICH CALLS TFFCONMU + TFFRP/RA) TO CALCULATE
030505,000037: # RPER (PERIGEE RADIUS), RAPO (APOGEE RADIUS), HPER (PERIGEE
030506,000038: # HEIGHT ABOVE LAUNCH PAD OR LUNAR LANDING SITE), HAPO (APOGEE
030507,000039: # HEIGHT AS ABOVE), TPER (TIME TO PERIGEE), TFF (TIME TO
030508,000040: # INTERSECT 300 KFT ABOVE PAD OR 35KFT ABOVE LANDING SITE).
030509,000041: # FLASH MONITOR V16N44 (HAPO, HPER, TFF).TFF IS -59M59S IF IT WAS
030510,000042: # NOT COMPUTABLE, OTHERWISE IT INCREMENTS ONCE PER SECOND.
030511,000043: # ASTRONAUT HAS OPTION TO MONITOR TPER BY KEYING IN N 32 E.
030512,000044: # DISPLAY IS IN HMS, IS NEGATIVE (AS WAS TFF), AND INCREMENTS
030513,000045: # ONCE PER SECOND ONLY IF TFF DISPLAY WAS -59M59S.
030514,000046:
030515,000047: # 2. IF AVERAGE G IS ON:
030516,000048: # CALLS SR30.1 APPROX EVERY TWO SECS. STATE VECTOR IS ALWAYS
030517,000049: # FOR THIS VEHICLE. V82 DOES NOT DISTURB STATE VECTOR. RESULTS
030518,000050: # OF SR30.1 ARE RAPO, RPER, HAPO, HPER, TPER, TFF.
030519,000051: # FLASH MONITOR V16N44 (HAPO, HPER, TFF).
030520,000052: # ADDENDUM: HAPO AND HPER SHOULD BE CHANGED TO READ HAPOX AND HPERX IN THE
030521,000053: # ABOVE REMARKS.
030522,000054:
030523,000055: # CALLING SEQUENCE: VERB 82 ENTER.
030524,000056:
030525,000057:
030526,000058: # SUBROUTINES CALLED: SR30.1, GOXDSPF
030527,000059: # MAYBE - THISPREC , OTHPREC, LOADTIME, DELRSPL
030528,000060: # NORMAL EXIT MODES: TC ENDEXT
030529,000061:
030530,000062: # ALARMS: NONE
030531,000063:
030532,000064: # OUTPUT: HAPOX (-29) M
030533,000065: # HPERX (-29) M
030534,000066: # RAPO (-29) M EARTH
030535,000067: # (-27) M MOON
030536,000068: # RPER (-29) M EARTH
030537,000069: # (-27) M MOON
030538,000070: # TFF (-28) CS CONTAINS NEGATIVE QUANTITY
030539,000071: # -TPER (-28) CS CONTAINS NEGATIVE QUANTITY
030540,000072:
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Page 707
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030542,000074:
030543,000075: # ERASABLE INITIALIZATION REQUIRED: STATE VECTOR.
030544,000076:
030545,000077: # DEBRIS: QPRET, RONE, VONE,TFF/RTMU, HPERMIN, RPADTEM, V82EMFLG.
030546,000078: # MAYBE: TSTART82, V82FLAGS, TDEC1.
030547,000079:
030548,000080:
030549,000081: 13,2347 E4,1517 EBANK= HAPOX
030550,000082: 31,2144 BANK 31
030551,000083: 22,2000 SETLOC R30LOC
030552,000084: 22,2000 BANK
030553,000085: 22,3242 COUNT* $$/R30
030554,000086:
030555,000087: 22,3242 06042 V82CALL TC INTPRET
030556,000088: 22,3243 52014 BON GOTO
030557,000089: 22,3244 03712 AVEGFLAG
030558,000090: 22,3245 45465 V82GON # IF AVERAGE G ON
030559,000091: 22,3246 45247 V82GOFF # IF AVERAGE G OFF
030560,000092:
030561,000093:
030562,000094: 22,3247 77776 V82GOFF EXIT # ALLOW ASTRONAUT TO SELECT VEHICLE
030563,000095: 22,3250 34752 CAF TWO # DESIRED FOR ORBITAL PARAMETERS
030564,000096: 22,3251 55050 TS OPTIONX # CALCULATION AND DISPLAY.
030565,000097: 22,3252 34753 CAF ONE
030566,000098: 22,3253 55051 TS OPTIONX +1
030567,000099: 22,3254 33316 CAF OPTIONVN # V 04 N 06
030568,000100: 22,3255 04616 TC BANKCALL
030569,000101: 22,3256 20334 CADR GOXDSPF
030570,000102: 22,3257 05503 TC ENDEXT # TERMINATE
030571,000103: 22,3260 03262 TC +2 # PROCEED
030572,000104: 22,3261 03254 TC -5 # DATA IN. OPTION1+1 = 1 FOR THIS VEHICLE.
030573,000105: # UNEQ 1 FOR OTHER VEHICLE.
030574,000106: 22,3262 34750 CAF BIT4 # 80 MS
030575,000107: 22,3263 05214 TC WAITLIST
030576,000108: 22,3264 E4,1540 EBANK= TFF
030577,000109: 22,3264 03430 44064 2CADR TICKTEST
030578,000110:
030579,000111: 22,3266 00003 RELINT
030580,000112: 22,3267 33320 V82GOFLP CAF TFFBANK # MAJOR RECYCLE LOOP ENTRY
030581,000113: 22,3270 54003 TS EBANK
030582,000114: 22,3271 34755 CAF ZERO
030583,000115: 22,3272 55537 TS V82FLAGS # ZERO FLAGS FOR TICKTEST. INHIBITS
030584,000116: # DECREMENTING OF TFF AND -TPER.
030585,000117: 22,3273 35021 CAF PRIO7
030586,000118: 22,3274 05105 TC FINDVAC # V82GOFF1 WILL EXECUTE STATE VECTOR
030587,000119: 22,3275 E4,1540 EBANK= TFF # UPDATE AND ORBIT CALCULATIONS FOR
030588,000120: 22,3275 03321 44064 2CADR V82GOFF1 # SELECTED VEHICLE ABOUT PROPER BODY.
030589,000121:
030590,000122: 22,3277 00003 RELINT
030591,000123: 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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030593,000125: 22,3301 71537 MASK V82FLAGS # UNTIL STATE VECTOR UPDATE SETS ONE OF
030594,000126: 22,3302 10000 CCS A # OUR FLAG BITS.
030595,000127: 22,3303 03310 TC FLAGGON # EXIT FROM STALL LOOP.
030596,000128: 22,3304 34777 CAF 1SEC
030597,000129: 22,3305 04616 TC BANKCALL
030598,000130: 22,3306 01736 CADR DELAYJOB
030599,000131: 22,3307 03300 TC V82STALL
030600,000132:
030601,000133: 22,3310 33317 FLAGGON CAF V16N44 # MONITOR HAPO,HPER,TFF.
030602,000134: 22,3311 04616 TC BANKCALL
030603,000135: 22,3312 20334 CADR GOXDSPF
030604,000136: 22,3313 05574 TC B5OFF # TERM THIS TELLS TICKTEST TO KILL ITSELF
030605,000137: 22,3314 05574 TC B5OFF # PROCEED DITTO
030606,000138: 22,3315 03267 TC V82GOFLP # RECYCLE RECOMPUTE STATE VECT + DISPLAY
030607,000139:
030608,000140: 22,3316 01014 OPTIONVN VN 412
030609,000141: 22,3317 04054 V16N44 VN 1644
030610,000142: 22,3320 02140 TFFBANK ECADR TFF
030611,000143:
030612,000144:
030613,000145: 22,3321 06042 V82GOFF1 TC INTPRET
030614,000146: 22,3322 77634 RTB
030615,000147: 22,3323 21574 LOADTIME
030616,000148: 22,3324 00041 STORE TDEC1 # TIME FOR STATE VECTOR UPDATE.
030617,000149: 22,3325 02205 STORE TSTART82 # TIME FOR INTERNAL USE.
030618,000150: 22,3326 77776 EXIT
030619,000151: 22,3327 41051 CS OPTIONX +1 # 1 FOR THIS VEHICLE, NOT 1 FOR OTHER.
030620,000152: 22,3330 64753 AD ONE
030621,000153: 22,3331 00006 EXTEND
030622,000154: 22,3332 13356 BZF THISSHIP
030623,000155: 22,3333 06042 OTHSHIP TC INTPRET
030624,000156: 22,3334 77624 CALL # CALL STATE VECTOR UPDATE FOR OTHER SHIP.
030625,000157: 22,3335 27042 OTHPREC
030626,000158: 22,3336 77775 BOTHSHIP VLOAD # MOVE RESULTS INTO TFFCONIC STORAGE AREAS
030627,000159: 22,3337 00001 RATT # TO BE CALLED BY SR30.1.
030628,000160: 22,3340 26207 STOVL RONE # RATT AT (-29)M FOR EARTH OR MOON
030629,000161: 22,3341 00007 VATT
030630,000162: 22,3342 02215 STORE VONE # VATT AT (-7)M/CS FOR EARTH OR MOON
030631,000163: 22,3343 77743 DLOAD*
030632,000164: 22,3344 73774 1/RTMUE,2 # X2 IS 0 FOR EARTH CENTERED STATE VEC
030633,000165: 22,3345 00037 STORE TFF/RTMU # X2 IS 2 FOR MOON
030634,000166: 22,3346 77743 DLOAD* # AS LEFT BY THISPREC OR OTHPREC.
030635,000167: 22,3347 72411 MINPERE,2
030636,000168: 22,3350 02201 STORE HPERMIN # TFFRTMU, HPERMIN AND RPADTEM ARE ALL
030637,000169: 22,3351 46135 SLOAD BHIZ # EARTH/MOON PARAMETERS AS SET HERE.
030638,000170: 22,3352 00050 X2
030639,000171: 22,3353 45367 EARTHPAD
030640,000172: 22,3354 77650 GOTO
030641,000173: 22,3355 45373 MOONPAD
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Page 709
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030643,000175: 22,3356 06042 THISSHIP TC INTPRET
030644,000176: 22,3357 77624 CALL # CALL STATE VECTOR UPDATE FOR THIS SHIP.
030645,000177: 22,3360 27056 THISPREC
030646,000178: 22,3361 77650 GOTO
030647,000179: 22,3362 45336 BOTHSHIP
030648,000180:
030649,000181: # THE FOLLOWING CONSTANTS ARE PAIRWISE INDEXED. DO NOT SEPARATE PAIRS.
030650,000182:
030651,000183: 22,3363 00001 11530 MINPERM 2DEC 10668 B-27 # 35 KFT MIN PERIGEE HEIGHT FOR MOON(-27)M
030652,000184:
030653,000185: 22,3365 00002 31230 MINPERE 2DEC 91440 B-29 # 300 KFT (-29)M FOR EARTH
030654,000186:
030655,000187: 22,3367 43145 EARTHPAD DLOAD CLRGO # PAD 37-B RADIUS. SCALED AT (-29)M.
030656,000188: 22,3370 06334 RPAD
030657,000189: 22,3371 03635 V82EMFLG # INDICATE EARTH SCALING FOR SR30.1
030658,000190: 22,3372 45377 BOTHPAD
030659,000191:
030660,000192: 22,3373 51575 MOONPAD VLOAD ABVAL # COMPUTE MOON PAD RADIUS FROM RLS VECTOR.
030661,000193: 22,3374 02021 RLS # SCALED AT (-27)M.
030662,000194: 22,3375 77614 SET
030663,000195: 22,3376 03475 V82EMFLG # INDICATE MOON SCALING FOR SR30.1
030664,000196: 22,3377 36203 BOTHPAD STCALL RPADTEM
030665,000197: 22,3400 45551 SR30.1 # CALCULATE ORBITAL PARAMETERS
030666,000198: 22,3401 45234 RTB DSU
030667,000199: 22,3402 21574 LOADTIME
030668,000200: 22,3403 02205 TSTART82 # PRESENT TIME - TIME V82GOFF1 BEGAN
030669,000201: 22,3404 02205 STORE TSTART82 # SAVE IT
030670,000202: 22,3405 53145 DLOAD BZE # SR30.1 SETS -TPER=0 IF HPER L/
030671,000203: 22,3406 02143 -TPER # HPERMIN (300 OR 35) KFT.
030672,000204: 22,3407 45420 TICKTFF # (-TPER = 0)
030673,000205: 22,3410 43345 TICKTPER DLOAD DAD # (-TPER NON ZERO) TFF WAS NOT COMPUTED,
030674,000206: 22,3411 02143 -TPER # BUT WAS SET TO 59M59S.DONT TICK TFF, DO
030675,000207: 22,3412 02205 TSTART82 # TICK -TPER. DISPLAY BOTH.
030676,000208: 22,3413 02143 STORE -TPER # -TPER CORRECTED FOR TIME SINCE V82GOFF1
030677,000209: 22,3414 77776 EXIT # BEGAN.
030678,000210: 22,3415 34753 CAF BIT1
030679,000211: 22,3416 55537 TS V82FLAGS # INFORMS TICKTEST TO INCREMENT ONLY -TPER
030680,000212: 22,3417 05155 TC ENDOFJOB
030681,000213:
030682,000214: 22,3420 43345 TICKTFF DLOAD DAD # (-TPER=0) TFF WAS COMPUTED.TICK TFF.
030683,000215: 22,3421 02141 TFF # DO NOT TICK -TPER.DISPLAY TFF, BUT NOT
030684,000216: 22,3422 02205 TSTART82 # -TPER.
030685,000217: 22,3423 02141 STORE TFF # TFF CORRECTED FOR TIME SINCE V82GOFF1
030686,000218: 22,3424 77776 EXIT # BEGAN.
030687,000219: 22,3425 34752 CAF BIT2
030688,000220: 22,3426 55537 TS V82FLAGS # INFORMS TICKTEST TO INCREMENT ONLY TFF.
030689,000221: 22,3427 05155 TC ENDOFJOB
030690,000222:
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Page 710
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030692,000224: 22,3430 34747 TICKTEST CAF BIT5 # THIS WAITLIST PROGRAM PERPETUATES ITSELF
030693,000225: 22,3431 71043 MASK EXTVBACT # ONCE A SEC UNTIL BIT 5 OF EXTVBACT =0.
030694,000226: 22,3432 10000 CCS A
030695,000227: 22,3433 03441 TC DOTICK
030696,000228: 22,3434 37716 CAF PRIO25
030697,000229: 22,3435 05072 TC NOVAC # TERMINATE V 82.CANT CALL ENDEXT IN RUPT.
030698,000230: 22,3436 1043 EBANK= EXTVBACT
030699,000231: 22,3436 05503 04062 2CADR ENDEXT
030700,000232:
030701,000233: 22,3440 05272 TC TASKOVER
030702,000234: 22,3441 34777 DOTICK CAF 1SEC # RE-REQUEST TICKTEST.
030703,000235: 22,3442 05214 TC WAITLIST
030704,000236: 22,3443 E4,1540 EBANK= TFF
030705,000237: 22,3443 03430 44064 2CADR TICKTEST
030706,000238:
030707,000239: 22,3445 36250 CAF THREE
030708,000240: 22,3446 71537 MASK V82FLAGS
030709,000241: 22,3447 50000 INDEX A
030710,000242: 22,3450 03451 TC +1
030711,000243: 22,3451 05272 TC TASKOVER # IF NO FLAGBITS SET DONT CHANGE TFF OR
030712,000244: # -TPER, BUT CONTINUE LOOP.
030713,000245: 22,3452 03460 TC TPERTICK # ONLY BIT 1 SET. INCR -TPER BY 1 SEC.
030714,000246: 22,3453 34777 TFFTICK CAF 1SEC # ONLY BIT 2 SET. INCR TFF BY 1 SEC.
030715,000247: 22,3454 54001 TS L
030716,000248: 22,3455 34755 CAF ZERO
030717,000249: 22,3456 21541 DAS TFF
030718,000250: 22,3457 05272 TC TASKOVER
030719,000251: 22,3460 34777 TPERTICK CAF 1SEC
030720,000252: 22,3461 54001 TS L
030721,000253: 22,3462 34755 CAF ZERO
030722,000254: 22,3463 21543 DAS -TPER
030723,000255: 22,3464 05272 TC TASKOVER
030724,000256:
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Page 711
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030726,000258: 22,3465 77776 V82GON EXIT # AVERAGE G ON. USE CURRENT STATE VECTOR
030727,000259: # FOR ORBITAL PARAMETER CALCULATIONS.
030728,000260: 22,3466 35021 CAF PRIO7 # LESS THAN LAMBERT
030729,000261: 22,3467 05105 TC FINDVAC # V82GON1 WILL PERFORM ORBIT CALCULATIONS
030730,000262: 22,3470 E4,1540 EBANK= TFF # ABOUT PROPER BODY APPROX ONCE PER SEC.
030731,000263: 22,3470 03503 44064 2CADR V82GON1
030732,000264:
030733,000265: 22,3472 00003 RELINT
030734,000266: 22,3473 10067 CCS NEWJOB # WITHOLD V16 N44 UNTIL FIRST ORBIT CALC
030735,000267: 22,3474 05122 TC CHANG1 # IS DONE. NOTE: V82GON1 (PRIO7, FINDVAC
030736,000268: # JOB) IS COMPLETED BEFORE V82GON (PRIO7,
030737,000269: # NOVAC JOB).
030738,000270: 22,3475 33317 V82REDSP CAF V16N44 # MONITOR HAPO, HPER, TFF
030739,000271: 22,3476 04616 TC BANKCALL
030740,000272: 22,3477 20334 CADR GOXDSPF
030741,000273: 22,3500 05574 TC B5OFF # TERM THIS TELLS V82GON1 TO KILL ITSELF.
030742,000274: 22,3501 05574 TC B5OFF # PROC DITTO.
030743,000275: 22,3502 03475 TC V82REDSP # RECYCLE
030744,000276:
030745,000277: 22,3503 06042 V82GON1 TC INTPRET # THIS EXEC PROGRAM PERPETUATES ITSELF
030746,000278: # ONCE A SEC UNTIL BIT 5 OF EXTVBACT =0.
030747,000279: 22,3504 52175 VLOAD GOTO # HOLDS OFF CCS NEWJOB BETWEEN RN AND
030748,000280: 22,3505 01220 RN # VN FETCH SO RN , VN ARE FROM SAME
030749,000281: 22,3506 45507 NEXTLINE # STATE VECTOR UPDATE.
030750,000282: 22,3507 26207 NEXTLINE STOVL RONE # RN AT (-29)M FOR EARTH OR MOON
030751,000283: 22,3510 01226 VN
030752,000284: 22,3511 02215 STORE VONE # VN AT (-7)M/CS FOR EARTH OR MOON
030753,000285: 22,3512 52014 BON GOTO
030754,000286: 22,3513 04304 MOONTHIS # FLAG INDICATES BODY ABOUT WHICH ORBITAL
030755,000287: 22,3514 45516 MOONGON # CALCULATIONS ARE TO BE PERFORMED.
030756,000288: 22,3515 45527 EARTHGON # IF SET - MOON , IF RESET - EARTH.
030757,000289:
030758,000290: 22,3516 71214 MOONGON SET DLOAD
030759,000291: 22,3517 03475 V82EMFLG # INDICATE MOON SCALING FOR SR30.1
030760,000292: 22,3520 04001 1/RTMUM # LUNAR PARAMETERS LOADED HERE FOR SR30.1
030761,000293: 22,3521 14037 STODL TFF/RTMU
030762,000294: 22,3522 05364 MINPERM
030763,000295: 22,3523 26201 STOVL HPERMIN
030764,000296: 22,3524 02021 RLS # SCALED AT (-27)M.
030765,000297: 22,3525 52046 ABVAL GOTO
030766,000298: 22,3526 45536 V82GON2
030767,000299: 22,3527 71214 EARTHGON CLEAR DLOAD
030768,000300: 22,3530 03675 V82EMFLG # INDICATE EARTH SCALING FOR SR30.1
030769,000301: 22,3531 04003 1/RTMUE # EARTH PARAMETERS LOADED HERE FOR SR30.1
030770,000302: 22,3532 14037 STODL TFF/RTMU
030771,000303: 22,3533 05366 MINPERE
030772,000304: 22,3534 16201 STODL HPERMIN
030773,000305: 22,3535 06334 RPAD
030774,000306: 22,3536 36203 V82GON2 STCALL RPADTEM # COMMON CODE FOR EARTH & MOON.
030775,000307: 22,3537 45551 SR30.1
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Page 712
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030777,000309: 22,3540 77776 EXIT
030778,000310: 22,3541 34747 V82GON3 CAF BIT5
030779,000311: 22,3542 71043 MASK EXTVBACT # SEE IF ASTRONAUT HAS SIGNALLED TERMINATE
030780,000312: 22,3543 00006 EXTEND
030781,000313: 22,3544 15503 BZF ENDEXT # YES, TERMINATE VB 82 LOOP
030782,000314: 22,3545 34777 CAF 1SEC
030783,000315: 22,3546 04616 TC BANKCALL # WAIT ONE SECOND BEFORE REPEATING
030784,000316: 22,3547 01736 CADR DELAYJOB # ORBITAL PARAMETER COMPUTATION.
030785,000317: 22,3550 03503 TC V82GON1
030786,000318:
030787,000319: 22,3551 22,3541 SPLRET = V82GON3
030788,000320:
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Page 713
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030790,000322: # SUBROUTINE NAME: SR30.1
030791,000323: # MOD NO: 0 DATE: 16 FEB 67
030792,000324: # MOD BY: RR BAIRNSFATHER LOG SECTION: R32
030793,000325: # MOD NO: 1 MOD BY: RR BAIRNSFATHER DATE: 11 APR 67 SR30.1 CHANGED TO ALLOW MONITOR OPERN
030794,000326: # MOD NO: 2 MOD BY: RR BAIRNSFATHER DATE: 14 APR 67 ADD OVFL CK FOR RAPO
030795,000327: # MOD NO: 3 MOD BY ALONSO DATE: 11 DEC 67 SUBROUTINE REWRITTEN
030796,000328: # MOD NO: 4 MOD BY ALONSO DATE: 26 MAR 68 PROG MOD TO HANDLE DIF EARTH/MOON SCALE
030797,000329: # MOD NO: 5 MOD BY: RR BAIRNSFATHER DATE: 6 AUG 68 OVFL CK FOR HAPO & HPER.VOIDS MOD #2.
030798,000330:
030799,000331: # NEW FUNCTIONAL DESCRIPTION: ORBITAL PARAMETERS DISPLAY FOR NOUNS 32 AND 44.
030800,000332: # SR30.1 CALLS TFFCONMU AND TFFRP/RA TO CALCULATE RPER (PERIGEE RADIUS),
030801,000333: # RAPO (APOGEE RADIUS), HPER (PERIGEE HEIGHT ABOVE LAUNCH PAD OR LUNAR
030802,000334: # LANDING SITE), HAPO (APOGEE HEIGHT AS ABOVE), TPER (TIME TO PERIGEE),
030803,000335: # TFF (TIME TO INTERSECT 300 KFT ABOVE PAD OR 35KFT ABOVE LANDING SITE).
030804,000336: # IF HPER IS GREATER THAN OR EQUAL TO HPERMIN, CALCULATES TPER AND STORES
030805,000337: # NEGATIVE IN -TPER. OTHERWISE STORES +0 IN -TPER. WHENEVER TPER IS
030806,000338: # CALCULATED, TFF IS NOT COMPUTABLE AND DEFAULTS TO -59MIN 59SEC. IF HAPO
030807,000339: # WOULD EXCEED 9999.9 NM, IT IS LIMITED TO THAT VALUE FOR DISPLAY.
030808,000340:
030809,000341: # ADDENDUM: HAPO AND HPER SHOULD BE CHANGED TO READ HAPOX AND HPERX IN THE
030810,000342: # ABOVE REMARKS.
030811,000343:
030812,000344: # CALLING SEQUENCE: CALL
030813,000345: # SR30.1
030814,000346: # SUBROUTINES CALLED: TFFCONMU, TFFRP/RA, CALCTPER, CALCTFF
030815,000347: # NORMAL EXIT MODE: CALLING LINE +1 (STILL IN INTERPRETIVE MODE)
030816,000348: # ALARMS: NONE
030817,000349: # OUTPUT: RAPO (-29) M EARTH APOGEE RADIUS EARTH CENTERED COORD.
030818,000350: # (-27) M MOON MOON CENTERED COORD.
030819,000351: # RPER (-29) M EARTH PERIGEE RADIUS EARTH CENTERED COORD.
030820,000352: # (-27) M MOON MOON CENTERED COORD.
030821,000353: # HAPOX (-29) M APOGEE ALTITUDE ABOVE PAD OR LAND. SITE MAX VALUE LIMITED TO 9999.9 NM.
030822,000354: # HPERX (-29) M PERIGEE ALT. ABOVE PAD OR LAND. SITE MAX VALUE LIMITED TO 9999.9 NM.
030823,000355: # TFF (-28) CS TIME TO 300KFT OR 35KFT ALTITUDE
030824,000356: # -TPER (-28) CS TIME TO PERIGEE
030825,000357: # ERASABLE INITIALIZATION REQUIRED-
030826,000358: # TFF/RTMU (+17) EARTH RECIPROCAL OF PROPER GRAV CONSTANT FOR
030827,000359: # (+14) MOON EARTH OR MOON = 1/SQRT(MU).
030828,000360: # RONE (-29) M STATE VECTOR
030829,000361: # VONE (-7) M/CS STATE VECTOR
030830,000362: # RPADTEM (-29) M EARTH RADIUS OF LAUNCH PAD OR LUNAR LANDING
030831,000363: # (-27) M MOON SITE.
030832,000364: # HPERMIN (-29) M EARTH (300 OR 35)KFT MINIMUM PERIGEE ALTITUDE
030833,000365: # (-27) M MOON ABOVE LAUNCH PAD OR LUNAR LANDING SITE.
030834,000366: # V82EMFLG (INT SW BIT) RESET FOR EARTH, SET FOR MOON.
030835,000367:
030836,000368: # DEBRIS: QPRET, PDL, S2
030837,000369:
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Page 714
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030839,000371: 22,3551 COUNT* $$/SR30S
030840,000372:
030841,000373: 22,3551 44001 SR30.1 SETPD STQ # INITIALIZE PUSHDOWN LIST.
030842,000374: 22,3552 00001 0
030843,000375: 22,3553 00051 S2
030844,000376: # SR30.1 INPUT: RONE AT (-29)M EARTH/MOON
030845,000377: # VONE AT (-7)M/CS
030846,000378: # TFFCONMU,TFFRP/RA,CALCTPER AND CALCTFF
030847,000379: # CALLS REQUIRE :
030848,000380: # EARTH CENTERED (NO RESCALING REQUIRED)
030849,000381: # RONE SCALED TO B-29 M
030850,000382: # VONE SCALED TO B-7 M/CS
030851,000383: # MOON CENTERED (RESCALING REQUIRED)
030852,000384: # RONE SCALED TO B-27 M
030853,000385: # VONE SCALED TO B-5 M/CS
030854,000386: 22,3554 77214 BOFF VLOAD
030855,000387: 22,3555 03755 V82EMFLG # OFF FOR EARTH , ON FOR MOON.
030856,000388: 22,3556 45565 TFFCALLS
030857,000389: 22,3557 02207 RONE
030858,000390: 22,3560 77752 VSL2
030859,000391: 22,3561 26207 STOVL RONE
030860,000392: 22,3562 02215 VONE
030861,000393: 22,3563 77752 VSL2
030862,000394: 22,3564 02215 STORE VONE
030863,000395: 22,3565 77624 TFFCALLS CALL
030864,000396: 22,3566 57362 TFFCONMU
030865,000397: 22,3567 77624 CALL # TFFRP/RA COMPUTES RAPO,RPER.
030866,000398: 22,3570 57430 TFFRP/RA
030867,000399: # RETURNS WITH RAPO IN D(MPAC).
030868,000400: 22,3571 77625 DSU
030869,000401: 22,3572 02203 RPADTEM
030870,000402: 22,3573 64414 BOFF SR2R # NEED HAPO AT (-29)M FOR DISPLAY.
030871,000403: # IF MOON CENTERED, RESCALE FROM (-27)M.
030872,000404: # IF EARTH CENTERED ALREADY AT (-29)M.
030873,000405: 22,3574 03755 V82EMFLG # OFF FOR EARTH , ON FOR MOON.
030874,000406: 22,3575 45576 +1
030875,000407: 22,3576 77624 CALL # IF HAPO > MAXNM, SET HAPO =9999.9 NM.
030876,000408: 22,3577 45636 MAXCHK # OTHERWISE STORE (RAPO-RPADTEM) IN HAPO.
030877,000409: 22,3600 16120 STORHAPO STODL HAPOX
030878,000410: 22,3601 00017 RPER
030879,000411: 22,3602 77625 DSU
030880,000412: 22,3603 02203 RPADTEM # GIVES HPER AT (-29)M EARTH, (-27)M MOON.
030881,000413: 22,3604 00161 STORE MPAC +4 # SAVE THIS FOR COMPARISON TO HPERMIN.
030882,000414: 22,3605 64414 BOFF SR2R # NEED HPER AT (-29)M FOR DISPLAY.
030883,000415: # IF MOON CENTERED, RESCALE FROM (-27)M.
030884,000416: # IF EARTH CENTERED ALREADY AT (-29)M.
030885,000417: 22,3606 03755 V82EMFLG # OFF FOR EARTH, ON FOR MOON.
030886,000418: 22,3607 45610 +1
030887,000419: 22,3610 77624 CALL # IF HPER > MAXNM, SET HPER = 9999.9 NM.
030888,000420: 22,3611 45636 MAXCHK
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Page 715
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030890,000422: 22,3612 16122 STORHPER STODL HPERX # STORE (RPER - RPADTEM) INTO HPERX.
030891,000423: 22,3613 00161 MPAC +4
030892,000424: 22,3614 51025 DSU BPL # HPERMIN AT (-29)M FOR EARTH, (-27)M MOON
030893,000425: 22,3615 02201 HPERMIN # IF HPER L/ HPERMIN (300 OR 35)KFT,
030894,000426: 22,3616 45622 DOTPER # THEN ZERO INTO -TPER.
030895,000427: 22,3617 52145 DLOAD GOTO # OTHERWISE CALCULATE TPER.
030896,000428: 22,3620 06470 HI6ZEROS
030897,000429: 22,3621 45626 SKIPTPER
030898,000430: 22,3622 45145 DOTPER DLOAD CALL
030899,000431: 22,3623 00017 RPER
030900,000432: 22,3624 57466 CALCTPER
030901,000433: 22,3625 77676 DCOMP # TPER IS PUT NEG INTO -TPER.
030902,000434: 22,3626 16143 SKIPTPER STODL -TPER
030903,000435: 22,3627 02201 HPERMIN # HPERMIN AT (-29)M FOR EARTH, (-27)M MOON
030904,000436: 22,3630 45015 DAD CALL
030905,000437: 22,3631 02203 RPADTEM # RPADTEM AT (-29)M FOR EARTH, (-27)M MOON
030906,000438: 22,3632 57471 CALCTFF # GIVES 59M59S FOR TFF IF RPER G/
030907,000439: 22,3633 77676 DCOMP # HPERMIN + RPADTEM. (TPER WAS NON ZERO)
030908,000440: 22,3634 36141 STCALL TFF # OTHERWISE COMPUTES TFF. (GOTO)
030909,000441: 22,3635 00051 S2
030910,000442:
030911,000443: 22,3636 51025 MAXCHK DSU BPL # IF C(MPAC) > 9999.9 NM, MPAC = 9999.9 NM
030912,000444: 22,3637 05646 MAXNM
030913,000445: 22,3640 45643 +3 # OTHERWISE C(MPAC) = B(MPAC).
030914,000446: 22,3641 43415 DAD RVQ
030915,000447: 22,3642 05646 MAXNM
030916,000448: 22,3643 43545 +3 DLOAD RVQ # (USED BY P30 - P37 ALSO)
030917,000449: 22,3644 05646 MAXNM
030918,000450:
030919,000451: 22,3645 01065 05603 MAXNM 2OCT 0106505603
030920,000452:
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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