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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036159,000002: ## Copyright: Public domain.
036160,000003: ## Filename: P12.agc
036161,000004: ## Purpose: A section of Luminary revision 163.
036162,000005: ## It is part of the reconstructed source code for the first
036163,000006: ## (unflown) release of the flight software for the Lunar
036164,000007: ## Module's (LM) Apollo Guidance Computer (AGC) for Apollo 14.
036165,000008: ## The code has been recreated from a reconstructed copy of
036166,000009: ## Luminary 173, as well as Luminary memos 157 amd 158.
036167,000010: ## It has been adapted such that the resulting bugger words
036168,000011: ## exactly match those specified for Luminary 163 in NASA
036169,000012: ## drawing 2021152N, which gives relatively high confidence
036170,000013: ## that the reconstruction is correct.
036171,000014: ## Reference: pp. 829-833
036172,000015: ## Assembler: yaYUL
036173,000016: ## Contact: Ron Burkey <info@sandroid.org>.
036174,000017: ## Website: www.ibiblio.org/apollo/index.html
036175,000018: ## Mod history: 2019-08-21 MAS Created from Luminary 173.
036176,000019:
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Page 829
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036178,000021: 24,3632 BANK 24
036179,000022: 30,2000 SETLOC P12
036180,000023: 30,2000 BANK
036181,000024:
036182,000025: 30,2061 E7,1515 EBANK= DVCNTR
036183,000026: 30,2061 COUNT* $$/P12
036184,000027:
036185,000028: 30,2061 05364 P12LM TC PHASCHNG
036186,000029: 30,2062 04024 OCT 04024
036187,000030:
036188,000031: 30,2063 04616 TC BANKCALL
036189,000032: 30,2064 11241 CADR R02BOTH # CHECK THE STATUS OF THE IMU.
036190,000033:
036191,000034: 30,2065 36000 CAF THRESH2 # INITIALIZE DVMON
036192,000035: 30,2066 55250 TS DVTHRUSH
036193,000036: 30,2067 34751 CAF FOUR
036194,000037: 30,2070 55515 TS DVCNTR
036195,000038:
036196,000039: 30,2071 33014 CAF V06N33A
036197,000040: 30,2072 04616 TC BANKCALL # FLASH TIG
036198,000041: 30,2073 20477 CADR GOFLASH
036199,000042: 30,2074 16001 TCF GOTOPOOH
036200,000043: 30,2075 12077 TCF +2 # PROCEED
036201,000044: 30,2076 12071 TCF -5 # ENTER
036202,000045:
036203,000046: 30,2077 05364 TC PHASCHNG
036204,000047: 30,2100 04024 OCT 04024
036205,000048:
036206,000049: 30,2101 06042 TC INTPRET
036207,000050: 30,2102 43014 SET SET
036208,000051: 30,2103 03067 MUNFLAG
036209,000052: 30,2104 06464 ACC4-2FL
036210,000053: 30,2105 43014 SET CLEAR
036211,000054: 30,2106 00075 R10FLAG
036212,000055: 30,2107 00270 RNDVZFLG
036213,000056: 30,2110 43014 SET SET
036214,000057: 30,2111 04464 FLPI
036215,000058: 30,2112 04461 FLVR
036216,000059: 30,2113 77624 CALL
036217,000060: 30,2114 71346 GUIDINIT
036218,000061: 30,2115 77624 CALL
036219,000062: 30,2116 60246 P12INIT
036220,000063: 30,2117 77745 P12LMB DLOAD
036221,000064: 30,2120 25630 (TGO)A # SET TGO TO AN INITIAL NOMINAL VALUE.
036222,000065: 30,2121 17517 STODL TGO
036223,000066: 30,2122 03442 TIG
036224,000067: 30,2123 34041 STCALL TDEC1
036225,000068: 30,2124 27056 LEMPREC # ROTATE THE STATE VECTORS TO THE
036226,000069: 30,2125 64375 VLOAD MXV # IGNITION TIME.
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Page 830
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036228,000071: 30,2126 00007 VATT
036229,000072: 30,2127 01732 REFSMMAT
036230,000073: 30,2130 77772 VSL1
036231,000074: 30,2131 27601 STOVL V1S # COMPUTE V1S = VEL(TIG)*2(-7)M/CS.
036232,000075: 30,2132 00001 RATT
036233,000076: 30,2133 52521 MXV VSL6
036234,000077: 30,2134 01732 REFSMMAT
036235,000078: 30,2135 37521 STCALL R # COMPUTE R = POS(TIG)*2(-24) M.
036236,000079: 30,2136 67000 MUNGRAV # COMPUTE GDT1/2(TIG)*2(-7)M/CS.
036237,000080: 30,2137 53575 VLOAD UNIT
036238,000081: 30,2140 03521 R
036239,000082: 30,2141 37537 STCALL UNIT/R/ # COMPUTE UNIT/R/ FOR YCOMP.
036240,000083: 30,2142 57317 YCOMP
036241,000084: 30,2143 57461 SR DCOMP
036242,000085: 30,2144 20606 5D
036243,000086: 30,2145 17643 STODL XRANGE # INITIALIZE XRANGE FOR NOUN 76.
036244,000087: 30,2146 31372 VINJNOM
036245,000088: 30,2147 16245 STODL ZDOTD
036246,000089: 30,2150 31374 RDOTDNOM
036247,000090: 30,2151 02241 STORE RDOTD
036248,000091: 30,2152 77776 EXIT
036249,000092:
036250,000093: 30,2153 05364 TC PHASCHNG
036251,000094: 30,2154 04024 OCT 04024
036252,000095:
036253,000096: 30,2155 33013 NEWLOAD CAF V06N76 # FLASH CROSS-RANGE AND APOLUNE VALUES.
036254,000097: 30,2156 04616 TC BANKCALL
036255,000098: 30,2157 20477 CADR GOFLASH
036256,000099: 30,2160 16001 TCF GOTOPOOH
036257,000100: 30,2161 12163 TCF +2 # PROCEED
036258,000101: 30,2162 12155 TCF NEWLOAD # ENTER NEW DATA.
036259,000102:
036260,000103: 30,2163 32311 CAF P12ADRES
036261,000104: 30,2164 55455 TS WHICH
036262,000105:
036263,000106: 30,2165 05364 TC PHASCHNG
036264,000107: 30,2166 04024 OCT 04024
036265,000108:
036266,000109: 30,2167 06042 TC INTPRET
036267,000110: 30,2170 54345 DLOAD SL
036268,000111: 30,2171 03643 XRANGE
036269,000112: 30,2172 20206 5D
036270,000113: 30,2173 77615 DAD
036271,000114: 30,2174 02303 Y
036272,000115: 30,2175 27633 STOVL YCO
036273,000116: 30,2176 03537 UNIT/R/
036274,000117: 30,2177 53361 VXSC VAD
036275,000118: 30,2200 31370 49FPS
036276,000119: 30,2201 03601 V1S
036277,000120: 30,2202 03527 STORE V # V(TIPOVER) = V(IGN) + 57FPS (UNIT/R/)
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Page 831
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036279,000122: 30,2203 72441 DOT SL1
036280,000123: 30,2204 03537 UNIT/R/
036281,000124: 30,2205 27474 STOVL RDOT # RDOT * 2(-7)
036282,000125: 30,2206 03537 UNIT/R/
036283,000126: 30,2207 53435 VXV UNIT
036284,000127: 30,2210 03720 QAXIS
036285,000128: 30,2211 37726 STCALL ZAXIS1
036286,000129: 30,2212 60312 ASCENT
036287,000130: 30,2213 77745 P12RET DLOAD
036288,000131: 30,2214 02327 ATP # ATP(2)*2(18)
036289,000132: 30,2215 65316 DSQ PDDL
036290,000133: 30,2216 02323 ATY # ATY(2)*2(18)
036291,000134: 30,2217 43316 DSQ DAD
036292,000135: 30,2220 75454 BZE SQRT
036293,000136: 30,2221 60225 YAWDUN
036294,000137: 30,2222 55352 SL1 BDDV
036295,000138: 30,2223 02323 ATY
036296,000139: 30,2224 77736 ARCSIN
036297,000140: 30,2225 26331 YAWDUN STOVL YAW
036298,000141: 30,2226 03253 UNFC/2
036299,000142: 30,2227 50256 UNIT DOT
036300,000143: 30,2230 03537 UNIT/R/
036301,000144: 30,2231 65552 SL1 ARCCOS
036302,000145: 30,2232 77676 DCOMP
036303,000146: 30,2233 02333 STORE PITCH
036304,000147: 30,2234 77776 EXIT
036305,000148: 30,2235 05364 TC PHASCHNG
036306,000149: 30,2236 04024 OCT 04024
036307,000150:
036308,000151: 30,2237 00004 INHINT
036309,000152: 30,2240 04674 TC IBNKCALL
036310,000153: 30,2241 40143 CADR PFLITEDB
036311,000154: 30,2242 05527 TC DOWNFLAG
036312,000155: 30,2243 00213 ADRES FLPI
036313,000156:
036314,000157: 30,2244 04635 TC POSTJUMP
036315,000158: 30,2245 74130 CADR BURNBABY
036316,000159:
036317,000160: 30,2246 77745 P12INIT DLOAD # INITIALIZE ENGINE DATA. USED FOR P12 AND
036318,000161: 30,2247 16013 (1/DV)A # P71.
036319,000162: 30,2250 03641 STORE 1/DV3
036320,000163: 30,2251 03637 STORE 1/DV2
036321,000164: 30,2252 17635 STODL 1/DV1
036322,000165: 30,2253 16017 (AT)A
036323,000166: 30,2254 16231 STODL AT
036324,000167: 30,2255 16021 (TBUP)A
036325,000168: 30,2256 16237 STODL TBUP
036326,000169: 30,2257 34013 ATDECAY
036327,000170: 30,2260 54276 DCOMP SL
036328,000171: 30,2261 20214 11D
036329,000172: 30,2262 02235 STORE TTO
036330,000173: 30,2263 57535 SLOAD DCOMP
036331,000174: 30,2264 26001 APSVEX
036332,000175: 30,2265 77702 SR2
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Page 832
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036334,000177: 30,2266 02233 STORE VE
036335,000178: 30,2267 43414 BOFF RVQ
036336,000179: 30,2270 04747 FLAP
036337,000180: 30,2271 60272 COMMINIT
036338,000181: 30,2272 43345 COMMINIT DLOAD DAD # INITIALIZE TARGET DATA. USED BY P12, P70
036339,000182: 30,2273 25626 HINJECT # AND P71 IF IT DOES NOT FOLLOW P70.
036340,000183: 30,2274 02301 /LAND/
036341,000184: 30,2275 17631 STODL RCO
036342,000185: 30,2276 06520 HI6ZEROS
036343,000186: 30,2277 03654 STORE TXO
036344,000187: 30,2300 03633 STORE YCO
036345,000188: 30,2301 26243 STOVL YDOTD
036346,000189: 30,2302 01563 VRECTCSM
036347,000190: 30,2303 64235 VXV MXV
036348,000191: 30,2304 01555 RRECTCSM
036349,000192: 30,2305 01732 REFSMMAT
036350,000193: 30,2306 77656 UNIT
036351,000194: 30,2307 03720 STORE QAXIS
036352,000195: 30,2310 77616 RVQ
036353,000196:
036354,000197: 30,2311 02024 P12ADRES REMADR P12TABLE
036355,000198:
036356,000199: 34,2000 SETLOC ASENT8
036357,000200: 34,2000 BANK
036358,000201: 34,3346 COUNT* $$/P12
036359,000202:
036360,000203: 34,3346 40220 GUIDINIT STQ SETPD
036361,000204: 34,3347 01163 TEMPR60
036362,000205: 34,3350 00001 0D
036363,000206: 34,3351 41575 VLOAD PUSH
036364,000207: 34,3352 06512 UNITZ
036365,000208: 34,3353 41434 RTB PUSH
036366,000209: 34,3354 21574 LOADTIME
036367,000210: 34,3355 77624 CALL
036368,000211: 34,3356 55720 RP-TO-R
036369,000212: 34,3357 74321 MXV VXSC
036370,000213: 34,3360 01732 REFSMMAT
036371,000214: 34,3361 16027 MOONRATE
036372,000215: 34,3362 26273 STOVL WM
036373,000216: 34,3363 02021 RLS
036374,000217: 34,3364 52446 ABVAL SL3
036375,000218: 34,3365 36301 STCALL /LAND/
036376,000219: 34,3366 01163 TEMPR60
036377,000220:
036378,000221: 34,3367 00046 07374 49FPS 2DEC .149352 B-6 # EXPECTED RDOT AT TIPOVER
036379,000222:
036380,000223: 34,3371 04145 15527 VINJNOM 2DEC 16.7924 B-7 # 5509.5 FPS(APO=30NM WITH RDOT=19.5FPS)
036381,000224:
036382,000225: 34,3373 00007 23346 RDOTDNOM 2DEC .059436 B-7 # 19.5 FPS
036383,000226:
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Page 833
This page is empty in the hardcopy of the original assembly listing.
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End of include-file P12.agc. Parent file is MAIN.agc