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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026479,000002: ## Copyright: Public domain.
026480,000003: ## Filename: P30,P37.agc
026481,000004: ## Purpose: A section of Luminary revision 173.
026482,000005: ## It is part of the reconstructed source code for the second
026483,000006: ## (unflown) release of the flight software for the Lunar
026484,000007: ## Module's (LM) Apollo Guidance Computer (AGC) for Apollo 14.
026485,000008: ## The code has been recreated from a reconstructed copy of
026486,000009: ## Luminary 178, as well as Luminary memo 167 (revision 1).
026487,000010: ## It has been adapted such that the resulting bugger words
026488,000011: ## exactly match those specified for Luminary 173 in NASA
026489,000012: ## drawing 2021152N, which gives relatively high confidence
026490,000013: ## that the reconstruction is correct.
026491,000014: ## Reference: pp. 612-615
026492,000015: ## Assembler: yaYUL
026493,000016: ## Contact: Ron Burkey <info@sandroid.org>.
026494,000017: ## Website: www.ibiblio.org/apollo/index.html
026495,000018: ## Mod history: 2019-09-18 MAS Created from Luminary 178.
026496,000019:
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Page 612
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026498,000021: # PROGRAM DESCRIPTION P30 DATE 3-6-67
026499,000022:
026500,000023: # MOD.1 BY RAMA AIYAWAR
026501,000024: # FUNCTIONAL DESCRIPTION
026502,000025: # ACCEPT ASTRONAUT INPUTS OF TIG,DELV(LV)
026503,000026: # CALL IMU STATUS CHECK ROUTINE (R02)
026504,000027: # DISPLAY TIME TO GO, APOGEE, PERIGEE, DELV(MAG), MGA AT IGN
026505,000028: # REQUEST BURN PROGRAM
026506,000029:
026507,000030: # CALLING SEQUENCE VIA JOB FROM V37
026508,000031:
026509,000032: # EXIT VIA V37 CALL OR TO GOTOPOOH (V34E)
026510,000033:
026511,000034: # SUBROUTINE CALLS-FLAGUP, PHASCHNG, BANKCALL, ENDOFJOB, GOFLASH, GOFLASHR
026512,000035: # GOPERF3R, INTPRET, BLANKET, GOTOPOOH, R02BOTH, S30.1,
026513,000036: # TTG/N35, MIDGIM, DISPMGA
026514,000037:
026515,000038: # ERASABLE INITIALIZATION- STATE VECTOR
026516,000039:
026517,000040: # OUTPUT-RINIT, VINIT, +MGA, VTIG, RTIG, DELVSIN, DELVSAB, DELVSLV, HAPO,
026518,000041: # HPER, TTOGO
026519,000042:
026520,000043: # DEBRIS- A, L, MPAC, PUSHLIST
026521,000044:
026522,000045: 32,2550 BANK 32
026523,000046: 35,2000 SETLOC P30S
026524,000047: 35,2000 BANK
026525,000048: 35,2000 E4,1652 EBANK= +MGA
026526,000049: 35,2000 COUNT* $$/P30
026527,000050: 35,2000 05515 P30 TC UPFLAG # SET UPDATE FLAG
026528,000051: 35,2001 00027 ADRES UPDATFLG
026529,000052: 35,2002 05515 TC UPFLAG # SET TRACK FLAG
026530,000053: 35,2003 00031 ADRES TRACKFLG
026531,000054:
026532,000055: 35,2004 32032 P30N33 CAF V06N33 # T OF IGN
026533,000056: 35,2005 03627 TC VNPOOH # RETURNS ON PROCEED, POOH ON TERMINATE
026534,000057:
026535,000058: 35,2006 33644 CAF V06N81 # DISPLAY DELTA V (LV)
026536,000059: 35,2007 03627 TC VNPOOH # REDISPLAY ON RECYCLE
026537,000060:
026538,000061: 35,2010 05527 TC DOWNFLAG # RESET UPDATE FLAG
026539,000062: 35,2011 00027 ADRES UPDATFLG
026540,000063: 35,2012 06042 TC INTPRET
026541,000064: 35,2013 77624 CALL
026542,000065: 35,2014 70000 S30.1
026543,000066: 35,2015 43014 SET SET
026544,000067: 35,2016 00470 UPDATFLG
026545,000068: 35,2017 01067 XDELVFLG
026546,000069: 35,2020 77776 EXIT
026547,000070: 35,2021 32033 PARAM30 CAF V06N42 # DISPLAY APOGEE,PERIGEE ,DELTA V
026548,000071:
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Page 613
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026550,000073: 35,2022 03627 TC VNPOOH
026551,000074:
026552,000075: 35,2023 06042 TC INTPRET
026553,000076: 35,2024 77614 SET
026554,000077: 35,2025 01071 FINALFLG
026555,000078: 35,2026 77624 REVN1645 CALL
026556,000079: 35,2027 73523 VN1645
026557,000080: 35,2030 77650 GOTO # COMES HERE ON RECYCLE RESPONSE
026558,000081: 35,2031 72026 REVN1645
026559,000082:
026560,000083: 35,2032 01441 V06N33 VN 0633
026561,000084: 35,2033 01452 V06N42 VN 0642
026562,000085:
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Page 614
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026564,000087: # PROGRAM DESCRIPTION S30.1 DATE 9NOV66
026565,000088:
026566,000089: # MOD NO 1 LOG SECTION P30,P37
026567,000090: # MOD BY RAMA AIYAWAR **
026568,000091: # FUNCTIONAL DESCRIPTION
026569,000092: # BASED ON STORED TARGET PARAMETERS(R OF IGNITION(RTIG),V OF
026570,000093: # IGNITION(VTIG),TIME OF IGNITION (TIG)),COMPUTE PERIGEE ALTITUDE
026571,000094: # APOGEE ALTITUDE AND DELTAV REQUIRED(DELVSIN).
026572,000095: # CALLING SEQUENCE
026573,000096: # L CALL
026574,000097: # L+1 S30.1
026575,000098: # NORMAL EXIT MODE
026576,000099: # AT L+2 OR CALLING SEQUENCE (GOTO L+2)
026577,000100: # SUBROUTINES CALLED
026578,000101: # LEMPREC
026579,000102: # PERIAPO
026580,000103: # ALARM OR ABORT EXIT MODES
026581,000104: # NONE
026582,000105: # ERASABLE INITIALIZATION REQUIRED
026583,000106: # TIG TIME OF IGNITION DP B28CS
026584,000107: # DELVSLV SPECIFIED DELTA-V IN LOCAL VERT.
026585,000108: # COORDS. OF ACTIVE VEHICLE AT
026586,000109: # TIME OF IGNITION VECTOR B+7 METERS/CS
026587,000110: # OUTPUT
026588,000111: # RTIG POSITION AT TIG VECTOR B+29 METERS
026589,000112: # VTIG VELOCITY AT TIG VECTOR B+29 METERS/CS
026590,000113: # PDL 4D APOGEE ALTITUDE DP B+29 M , B+27 METERS.
026591,000114: # HAPO APOGEE ALTITUDE DP B+29 METERS
026592,000115: # PDL 8D PERIGEE ALTITUDE DP B+29 M , B+27 METERS.
026593,000116: # HPER PERIGEE ALTITUDE DP B+29 METERS
026594,000117: # DELVSIN SPECIFIED DELTA-V IN INERTIAL
026595,000118: # COORD. OF ACTIVE VEHICLE AT
026596,000119: # TIME OF IGNITION VECTOR B+7 METERS/CS
026597,000120: # DELVSAB MAG. OF DELVSIN VECTOR B+7 METERS/CS
026598,000121: # DEBRIS QTEMP TEMP. ERASABLE
026599,000122: # QPRET,MPAC
026600,000123: # PUSHLIST
026601,000124:
026602,000125: 34,2000 SETLOC P30S1
026603,000126: 34,2000 BANK
026604,000127:
026605,000128: 34,2000 COUNT* $$/S30S
026606,000129:
026607,000130: 34,2000 71220 S30.1 STQ DLOAD
026608,000131: 34,2001 03632 QTEMP
026609,000132: 34,2002 03442 TIG # TIME IGNITION SCALED AT 2(+28)CS
026610,000133: 34,2003 34041 STCALL TDEC1
026611,000134: 34,2004 27056 LEMPREC # ENCKE ROUTINE FOR LEM
026612,000135:
026613,000136: 34,2005 67175 VLOAD SXA,2
026614,000137:
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Page 615
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026616,000139: 34,2006 00001 RATT
026617,000140: 34,2007 02777 RTX2
026618,000141: 34,2010 03642 STORE RTIG # RADIUS VECTOR AT IGNITION TIME
026619,000142: 34,2011 57456 UNIT VCOMP
026620,000143: 34,2012 27656 STOVL DELVSIN # ZRF/LV IN DELVSIN SCALED AT 2
026621,000144: 34,2013 00007 VATT # VELOCITY VECTOR AT TIG, SCALED 2(7) M/CS
026622,000145: 34,2014 03650 STORE VTIG
026623,000146: 34,2015 53435 VXV UNIT
026624,000147: 34,2016 03642 RTIG
026625,000148: 34,2017 66001 SETPD SXA,1
026626,000149: 34,2020 00001 0
026627,000150: 34,2021 02776 RTX1
026628,000151: 34,2022 47206 PUSH VXV # YRF/LV PDL 0 SCALED AT 2
026629,000152: 34,2023 03656 DELVSIN
026630,000153: 34,2024 63372 VSL1 PDVL
026631,000154: 34,2025 63315 PDVL PDVL # YRF/LV PDL 6 SCALED AT 2
026632,000155: 34,2026 03656 DELVSIN # ZRF/LV PDL 12D SCALED AT 2
026633,000156: 34,2027 03434 DELVSLV
026634,000157: 34,2030 76505 VXM VSL1
026635,000158: 34,2031 00001 0
026636,000159: 34,2032 03656 STORE DELVSIN # DELTAV IN INERT. COOR. SCALED TO B+7M/CS
026637,000160: 34,2033 77646 ABVAL
026638,000161: 34,2034 27664 STOVL DELVSAB # DELTA V MAG.
026639,000162: 34,2035 03642 RTIG # (FOR PERIAPO)
026640,000163: 34,2036 53315 PDVL VAD # VREQUIRED = VTIG + DELVSIN (FOR PERIAPO)
026641,000164: 34,2037 03650 VTIG
026642,000165: 34,2040 03656 DELVSIN
026643,000166: 34,2041 77624 CALL
026644,000167: 34,2042 46335 PERIAPO1
026645,000168: 34,2043 77624 CALL
026646,000169: 34,2044 46445 SHIFTR1 # RESCALE IF NEEDED
026647,000170: 34,2045 77624 CALL # LIMIT DISPLAY TO 9999.9 N. MI.
026648,000171: 34,2046 45636 MAXCHK
026649,000172: 34,2047 16321 STODL HPER # PERIGEE ALT 2(29) METERS, FOR DISPLAY
026650,000173: 34,2050 00005 4D
026651,000174: 34,2051 77624 CALL
026652,000175: 34,2052 46445 SHIFTR1 # RESCALE IF NEEDED
026653,000176: 34,2053 77624 CALL # LIMIT DISPLAY TO 9999.9 N. MI.
026654,000177: 34,2054 45636 MAXCHK
026655,000178: 34,2055 36317 STCALL HAPO # APOGEE ALT 2(29) METERS, FOR DISPLAY
026656,000179: 34,2056 03632 QTEMP
End of include-file P30,P37.agc. Parent file is MAIN.agc