Source Code
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These source-code files are part of a reconstructed copy of Luminary 163, the
first (unflown) release of the Apollo 14 Lunar Module (LM) Apollo Guidance
Computer (AGC) software.
The reconstruction began with reconstructed source code for Luminary 173. Changes
between revision 163 and 173 were backed out, as described by Luminary memos 157
and 158. 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 163 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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026477,000002: ## Copyright: Public domain.
026478,000003: ## Filename: P30,P37.agc
026479,000004: ## Purpose: A section of Luminary revision 163.
026480,000005: ## It is part of the reconstructed source code for the first
026481,000006: ## (unflown) release of the flight software for the Lunar
026482,000007: ## Module's (LM) Apollo Guidance Computer (AGC) for Apollo 14.
026483,000008: ## The code has been recreated from a reconstructed copy of
026484,000009: ## Luminary 173, as well as Luminary memos 157 amd 158.
026485,000010: ## It has been adapted such that the resulting bugger words
026486,000011: ## exactly match those specified for Luminary 163 in NASA
026487,000012: ## drawing 2021152N, which gives relatively high confidence
026488,000013: ## that the reconstruction is correct.
026489,000014: ## Reference: pp. 612-615
026490,000015: ## Assembler: yaYUL
026491,000016: ## Contact: Ron Burkey <info@sandroid.org>.
026492,000017: ## Website: www.ibiblio.org/apollo/index.html
026493,000018: ## Mod history: 2019-08-21 MAS Created from Luminary 173.
026494,000019:
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Page 612
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026496,000021: # PROGRAM DESCRIPTION P30 DATE 3-6-67
026497,000022:
026498,000023: # MOD.1 BY RAMA AIYAWAR
026499,000024: # FUNCTIONAL DESCRIPTION
026500,000025: # ACCEPT ASTRONAUT INPUTS OF TIG,DELV(LV)
026501,000026: # CALL IMU STATUS CHECK ROUTINE (R02)
026502,000027: # DISPLAY TIME TO GO, APOGEE, PERIGEE, DELV(MAG), MGA AT IGN
026503,000028: # REQUEST BURN PROGRAM
026504,000029:
026505,000030: # CALLING SEQUENCE VIA JOB FROM V37
026506,000031:
026507,000032: # EXIT VIA V37 CALL OR TO GOTOPOOH (V34E)
026508,000033:
026509,000034: # SUBROUTINE CALLS-FLAGUP, PHASCHNG, BANKCALL, ENDOFJOB, GOFLASH, GOFLASHR
026510,000035: # GOPERF3R, INTPRET, BLANKET, GOTOPOOH, R02BOTH, S30.1,
026511,000036: # TTG/N35, MIDGIM, DISPMGA
026512,000037:
026513,000038: # ERASABLE INITIALIZATION- STATE VECTOR
026514,000039:
026515,000040: # OUTPUT-RINIT, VINIT, +MGA, VTIG, RTIG, DELVSIN, DELVSAB, DELVSLV, HAPO,
026516,000041: # HPER, TTOGO
026517,000042:
026518,000043: # DEBRIS- A, L, MPAC, PUSHLIST
026519,000044:
026520,000045: 32,2550 BANK 32
026521,000046: 35,2000 SETLOC P30S
026522,000047: 35,2000 BANK
026523,000048: 35,2000 E4,1652 EBANK= +MGA
026524,000049: 35,2000 COUNT* $$/P30
026525,000050: 35,2000 05515 P30 TC UPFLAG # SET UPDATE FLAG
026526,000051: 35,2001 00027 ADRES UPDATFLG
026527,000052: 35,2002 05515 TC UPFLAG # SET TRACK FLAG
026528,000053: 35,2003 00031 ADRES TRACKFLG
026529,000054:
026530,000055: 35,2004 32032 P30N33 CAF V06N33 # T OF IGN
026531,000056: 35,2005 03621 TC VNPOOH # RETURNS ON PROCEED, POOH ON TERMINATE
026532,000057:
026533,000058: 35,2006 33636 CAF V06N81 # DISPLAY DELTA V (LV)
026534,000059: 35,2007 03621 TC VNPOOH # REDISPLAY ON RECYCLE
026535,000060:
026536,000061: 35,2010 05527 TC DOWNFLAG # RESET UPDATE FLAG
026537,000062: 35,2011 00027 ADRES UPDATFLG
026538,000063: 35,2012 06042 TC INTPRET
026539,000064: 35,2013 77624 CALL
026540,000065: 35,2014 70000 S30.1
026541,000066: 35,2015 43014 SET SET
026542,000067: 35,2016 00470 UPDATFLG
026543,000068: 35,2017 01067 XDELVFLG
026544,000069: 35,2020 77776 EXIT
026545,000070: 35,2021 32033 PARAM30 CAF V06N42 # DISPLAY APOGEE,PERIGEE ,DELTA V
026546,000071:
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Page 613
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026548,000073: 35,2022 03621 TC VNPOOH
026549,000074:
026550,000075: 35,2023 06042 TC INTPRET
026551,000076: 35,2024 77614 SET
026552,000077: 35,2025 01071 FINALFLG
026553,000078: 35,2026 77624 REVN1645 CALL
026554,000079: 35,2027 73515 VN1645
026555,000080: 35,2030 77650 GOTO # COMES HERE ON RECYCLE RESPONSE
026556,000081: 35,2031 72026 REVN1645
026557,000082:
026558,000083: 35,2032 01441 V06N33 VN 0633
026559,000084: 35,2033 01452 V06N42 VN 0642
026560,000085:
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Page 614
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026562,000087: # PROGRAM DESCRIPTION S30.1 DATE 9NOV66
026563,000088:
026564,000089: # MOD NO 1 LOG SECTION P30,P37
026565,000090: # MOD BY RAMA AIYAWAR **
026566,000091: # FUNCTIONAL DESCRIPTION
026567,000092: # BASED ON STORED TARGET PARAMETERS(R OF IGNITION(RTIG),V OF
026568,000093: # IGNITION(VTIG),TIME OF IGNITION (TIG)),COMPUTE PERIGEE ALTITUDE
026569,000094: # APOGEE ALTITUDE AND DELTAV REQUIRED(DELVSIN).
026570,000095: # CALLING SEQUENCE
026571,000096: # L CALL
026572,000097: # L+1 S30.1
026573,000098: # NORMAL EXIT MODE
026574,000099: # AT L+2 OR CALLING SEQUENCE (GOTO L+2)
026575,000100: # SUBROUTINES CALLED
026576,000101: # LEMPREC
026577,000102: # PERIAPO
026578,000103: # ALARM OR ABORT EXIT MODES
026579,000104: # NONE
026580,000105: # ERASABLE INITIALIZATION REQUIRED
026581,000106: # TIG TIME OF IGNITION DP B28CS
026582,000107: # DELVSLV SPECIFIED DELTA-V IN LOCAL VERT.
026583,000108: # COORDS. OF ACTIVE VEHICLE AT
026584,000109: # TIME OF IGNITION VECTOR B+7 METERS/CS
026585,000110: # OUTPUT
026586,000111: # RTIG POSITION AT TIG VECTOR B+29 METERS
026587,000112: # VTIG VELOCITY AT TIG VECTOR B+29 METERS/CS
026588,000113: # PDL 4D APOGEE ALTITUDE DP B+29 M , B+27 METERS.
026589,000114: # HAPO APOGEE ALTITUDE DP B+29 METERS
026590,000115: # PDL 8D PERIGEE ALTITUDE DP B+29 M , B+27 METERS.
026591,000116: # HPER PERIGEE ALTITUDE DP B+29 METERS
026592,000117: # DELVSIN SPECIFIED DELTA-V IN INERTIAL
026593,000118: # COORD. OF ACTIVE VEHICLE AT
026594,000119: # TIME OF IGNITION VECTOR B+7 METERS/CS
026595,000120: # DELVSAB MAG. OF DELVSIN VECTOR B+7 METERS/CS
026596,000121: # DEBRIS QTEMP TEMP. ERASABLE
026597,000122: # QPRET,MPAC
026598,000123: # PUSHLIST
026599,000124:
026600,000125: 34,2000 SETLOC P30S1
026601,000126: 34,2000 BANK
026602,000127:
026603,000128: 34,2000 COUNT* $$/S30S
026604,000129:
026605,000130: 34,2000 71220 S30.1 STQ DLOAD
026606,000131: 34,2001 03632 QTEMP
026607,000132: 34,2002 03442 TIG # TIME IGNITION SCALED AT 2(+28)CS
026608,000133: 34,2003 34041 STCALL TDEC1
026609,000134: 34,2004 27056 LEMPREC # ENCKE ROUTINE FOR LEM
026610,000135:
026611,000136: 34,2005 67175 VLOAD SXA,2
026612,000137:
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Page 615
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026614,000139: 34,2006 00001 RATT
026615,000140: 34,2007 02777 RTX2
026616,000141: 34,2010 03642 STORE RTIG # RADIUS VECTOR AT IGNITION TIME
026617,000142: 34,2011 57456 UNIT VCOMP
026618,000143: 34,2012 27656 STOVL DELVSIN # ZRF/LV IN DELVSIN SCALED AT 2
026619,000144: 34,2013 00007 VATT # VELOCITY VECTOR AT TIG, SCALED 2(7) M/CS
026620,000145: 34,2014 03650 STORE VTIG
026621,000146: 34,2015 53435 VXV UNIT
026622,000147: 34,2016 03642 RTIG
026623,000148: 34,2017 66001 SETPD SXA,1
026624,000149: 34,2020 00001 0
026625,000150: 34,2021 02776 RTX1
026626,000151: 34,2022 47206 PUSH VXV # YRF/LV PDL 0 SCALED AT 2
026627,000152: 34,2023 03656 DELVSIN
026628,000153: 34,2024 63372 VSL1 PDVL
026629,000154: 34,2025 63315 PDVL PDVL # YRF/LV PDL 6 SCALED AT 2
026630,000155: 34,2026 03656 DELVSIN # ZRF/LV PDL 12D SCALED AT 2
026631,000156: 34,2027 03434 DELVSLV
026632,000157: 34,2030 76505 VXM VSL1
026633,000158: 34,2031 00001 0
026634,000159: 34,2032 03656 STORE DELVSIN # DELTAV IN INERT. COOR. SCALED TO B+7M/CS
026635,000160: 34,2033 77646 ABVAL
026636,000161: 34,2034 27664 STOVL DELVSAB # DELTA V MAG.
026637,000162: 34,2035 03642 RTIG # (FOR PERIAPO)
026638,000163: 34,2036 53315 PDVL VAD # VREQUIRED = VTIG + DELVSIN (FOR PERIAPO)
026639,000164: 34,2037 03650 VTIG
026640,000165: 34,2040 03656 DELVSIN
026641,000166: 34,2041 77624 CALL
026642,000167: 34,2042 46335 PERIAPO1
026643,000168: 34,2043 77624 CALL
026644,000169: 34,2044 46445 SHIFTR1 # RESCALE IF NEEDED
026645,000170: 34,2045 77624 CALL # LIMIT DISPLAY TO 9999.9 N. MI.
026646,000171: 34,2046 45636 MAXCHK
026647,000172: 34,2047 16321 STODL HPER # PERIGEE ALT 2(29) METERS, FOR DISPLAY
026648,000173: 34,2050 00005 4D
026649,000174: 34,2051 77624 CALL
026650,000175: 34,2052 46445 SHIFTR1 # RESCALE IF NEEDED
026651,000176: 34,2053 77624 CALL # LIMIT DISPLAY TO 9999.9 N. MI.
026652,000177: 34,2054 45636 MAXCHK
026653,000178: 34,2055 36317 STCALL HAPO # APOGEE ALT 2(29) METERS, FOR DISPLAY
026654,000179: 34,2056 03632 QTEMP
End of include-file P30,P37.agc. Parent file is MAIN.agc