GAP: ASSEMBLE REVISION 001 OF AGC PROGRAM LMY99 BY NASA 2021112-061 16:27 JULY 14,1969Note that the date is the date of the printout, not the date of the program revision.
Source Code
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These source-code files were from the printout at the MIT Museum, with many thanks
to Deborah Douglas, the Museum's Curator of Science and Technology, for releasing
it to us. The printout was digitally photographed by Paul Fjeld. A team of
volunteers transcribed the source code manually from these images or, where
appropriate, modified already-transcribed but similar source Luminary 131 (Apollo 13)
source code to agree with the images from the printout. Note that the page images
presented online are of reduced quality, and that higher-quality images
are available. Report any conversion errors or legibility
problems in page images to info@sandroid.org.
Notations on the program listing read, in part:GAP: ASSEMBLE REVISION 001 OF AGC PROGRAM LMY99 BY NASA 2021112-061 16:27 JULY 14,1969Note that the date is the date of the printout, not the date of the program revision. |
036598,000002: ## Copyright: Public domain.
036599,000003: ## Filename: P12.agc
036600,000004: ## Purpose: Part of the source code for Luminary 1A build 099.
036601,000005: ## It is part of the source code for the Lunar Module's (LM)
036602,000006: ## Apollo Guidance Computer (AGC), for Apollo 11.
036603,000007: ## Assembler: yaYUL
036604,000008: ## Contact: Hartmuth Gutsche <hgutsche@xplornet.com>.
036605,000009: ## Website: www.ibiblio.org/apollo.
036606,000010: ## Pages: 838-842
036607,000011: ## Mod history: 2009-05-23 HG Transcribed from page images.
036608,000012: ## 2016-12-13 RSB GOTOP00H -> GOTOPOOH
036609,000013: ## 2016-12-17 RSB Proofed text comments with octopus/ProoferComments
036610,000014: ## and corrected the errors found.
036611,000015: ## 2017-01-28 RSB Back-ported a comment fix from Luminary 69.
036612,000016: ## 2017-08-26 MAS Fixed a comment-text error found while transcribing
036613,000017: ## Zerlina 56.
036614,000018: ##
036615,000019: ## This source code has been transcribed or otherwise adapted from
036616,000020: ## digitized images of a hardcopy from the MIT Museum. The digitization
036617,000021: ## was performed by Paul Fjeld, and arranged for by Deborah Douglas of
036618,000022: ## the Museum. Many thanks to both. The images (with suitable reduction
036619,000023: ## in storage size and consequent reduction in image quality as well) are
036620,000024: ## available online at www.ibiblio.org/apollo. If for some reason you
036621,000025: ## find that the images are illegible, contact me at info@sandroid.org
036622,000026: ## about getting access to the (much) higher-quality images which Paul
036623,000027: ## actually created.
036624,000028: ##
036625,000029: ## Notations on the hardcopy document read, in part:
036626,000030: ##
036627,000031: ## Assemble revision 001 of AGC program LMY99 by NASA 2021112-61
036628,000032: ## 16:27 JULY 14, 1969
036629,000033:
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Page 838 |
036631,000035: 24,3670 BANK 24
036632,000036: 30,2000 SETLOC P12
036633,000037: 30,2000 BANK
036634,000038:
036635,000039: 30,2061 E7,1515 EBANK= DVCNTR
036636,000040: 30,2061 COUNT* $$/P12
036637,000041:
036638,000042: 30,2061 05353 P12LM TC PHASCHNG
036639,000043: 30,2062 04024 OCT 04024
036640,000044:
036641,000045: 30,2063 04616 TC BANKCALL
036642,000046: 30,2064 11254 CADR R02BOTH # CHECK THE STATUS OF THE IMU.
036643,000047:
036644,000048: 30,2065 05504 TC UPFLAG
036645,000049: 30,2066 00141 ADRES MUNFLAG
036646,000050:
036647,000051: 30,2067 05504 TC UPFLAG # INSURE 4-JET TRANSLATION CAPABILITY.
036648,000052: 30,2070 00307 ADRES ACC4-2FL
036649,000053:
036650,000054: 30,2071 05504 TC UPFLAG # PREVENT R10 FROM ISSUING CROSS-POINTER
036651,000055: 30,2072 00015 ADRES R10FLAG # OUTPUTS.
036652,000056:
036653,000057: 30,2073 06011 TC CLRADMOD # INITIALIZE RADMODES FOR R29.
036654,000058:
036655,000059: 30,2074 05516 TC DOWNFLAG # CLEAR RENDEZVOUS FLAG FOR P22
036656,000060: 30,2075 00010 ADRES RNDVZFLG
036657,000061:
036658,000062: 30,2076 36000 CAF THRESH2 # INITIALIZE DVMON
036659,000063: 30,2077 55251 TS DVTHRUSH
036660,000064: 30,2100 34751 CAF FOUR
036661,000065: 30,2101 55515 TS DVCNTR
036662,000066:
036663,000067: 30,2102 34755 CA ZERO
036664,000068: 30,2103 55462 TS TRKMKCNT # SHOW THAT R29 DOWNLINK DATA ISN'T READY.
036665,000069: 30,2104 33035 CAF V06N33A
036666,000070: 30,2105 04616 TC BANKCALL # FLASH TIG
036667,000071: 30,2106 20476 CADR GOFLASH
036668,000072: 30,2107 16001 TCF GOTOPOOH
036669,000073: 30,2110 12112 TCF +2 # PROCEED
036670,000074: 30,2111 12104 TCF -5 # ENTER
036671,000075:
036672,000076: 30,2112 05353 TC PHASCHNG
036673,000077: 30,2113 04024 OCT 04024
036674,000078:
036675,000079: 30,2114 06037 TC INTPRET
036676,000080: 30,2115 77624 CALL # INITIALIZE WM AND /LAND/
036677,000081: 30,2116 46432 GUIDINIT
036678,000082: 30,2117 45014 SET CALL
036679,000083: 30,2120 04464 FLPI
036680,000084: 30,2121 60254 P12INIT
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Page 839 |
036682,000086: 30,2122 77745 P12LMB DLOAD
036683,000087: 30,2123 25761 (TGO)A # SET TGO TO AN INITIAL NOMINAL VALUE.
036684,000088: 30,2124 17517 STODL TGO
036685,000089: 30,2125 03442 TIG
036686,000090: 30,2126 34041 STCALL TDEC1
036687,000091: 30,2127 27057 LEMPREC # ROTATE THE STATE VECTORS TO THE
036688,000092: 30,2130 64375 VLOAD MXV # IGNITION TIME.
036689,000093: 30,2131 00007 VATT
036690,000094: 30,2132 01734 REFSMMAT
036691,000095: 30,2133 77772 VSL1
036692,000096: 30,2134 27601 STOVL V1S # COMPUTE V1S = VEL(TIG)*2(-7) M/CS.
036693,000097: 30,2135 00001 RATT
036694,000098: 30,2136 52521 MXV VSL6
036695,000099: 30,2137 01734 REFSMMAT
036696,000100: 30,2140 37521 STCALL R # COMPUTE R = POS(TIG)*2(-24) M.
036697,000101: 30,2141 67130 MUNGRAV # COMPUTE GDT1/2(TIG)*2(-7)M/CS.
036698,000102: 30,2142 53575 VLOAD UNIT
036699,000103: 30,2143 03521 R
036700,000104: 30,2144 37537 STCALL UNIT/R/ # COMPUTE UNIT/R/ FOR YCOMP.
036701,000105: 30,2145 57312 YCOMP
036702,000106: 30,2146 57461 SR DCOMP
036703,000107: 30,2147 20606 5D
036704,000108: 30,2150 17643 STODL XRANGE # INITIALIZE XRANGE FOR NOUN 76.
036705,000109: 30,2151 06456 VINJNOM
036706,000110: 30,2152 16277 STODL ZDOTD
036707,000111: 30,2153 06460 RDOTDNOM
036708,000112: 30,2154 02273 STORE RDOTD
036709,000113: 30,2155 77776 EXIT
036710,000114:
036711,000115: 30,2156 05353 TC PHASCHNG
036712,000116: 30,2157 04024 OCT 04024
036713,000117:
036714,000118: 30,2160 33034 NEWLOAD CAF V06N76 # FLASH CROSS-RANGE AND APOLUNE VALUES.
036715,000119: 30,2161 04616 TC BANKCALL
036716,000120: 30,2162 20476 CADR GOFLASH
036717,000121: 30,2163 16001 TCF GOTOPOOH
036718,000122: 30,2164 12166 TCF +2 # PROCEED
036719,000123: 30,2165 12160 TCF NEWLOAD # ENTER NEW DATA.
036720,000124:
036721,000125: 30,2166 32320 CAF P12ADRES
036722,000126: 30,2167 55455 TS WHICH
036723,000127:
036724,000128: 30,2170 05353 TC PHASCHNG
036725,000129: 30,2171 04024 OCT 04024
036726,000130:
036727,000131: 30,2172 06037 TC INTPRET
036728,000132: 30,2173 54345 DLOAD SL
036729,000133: 30,2174 03643 XRANGE
036730,000134: 30,2175 20206 5D
036731,000135: 30,2176 77615 DAD
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Page 840 |
036733,000137: 30,2177 02335 Y
036734,000138: 30,2200 27633 STOVL YCO
036735,000139: 30,2201 03537 UNIT/R/
036736,000140: 30,2202 53361 VXSC VAD
036737,000141: 30,2203 06454 49FPS
036738,000142: 30,2204 03601 V1S
036739,000143: 30,2205 03527 STORE V # V(TIPOVER) = V(IGN) + 57FPS (UNIT/R/)
036740,000144: 30,2206 72441 DOT SL1
036741,000145: 30,2207 03537 UNIT/R/
036742,000146: 30,2210 27474 STOVL RDOT # RDOT * 2(-7)
036743,000147: 30,2211 03537 UNIT/R/
036744,000148: 30,2212 53435 VXV UNIT
036745,000149: 30,2213 03720 QAXIS
036746,000150: 30,2214 03726 STORE ZAXIS1
036747,000151: 30,2215 77614 SETGO
036748,000152: 30,2216 04421 FLVR
036749,000153: 30,2217 60321 ASCENT
036750,000154: 30,2220 77745 P12RET DLOAD
036751,000155: 30,2221 02361 ATP # ATP(2)*2(18)
036752,000156: 30,2222 65316 DSQ PDDL
036753,000157: 30,2223 02355 ATY # ATY(2)*2(18)
036754,000158: 30,2224 43316 DSQ DAD
036755,000159: 30,2225 75454 BZE SQRT
036756,000160: 30,2226 60232 YAWDUN
036757,000161: 30,2227 55352 SL1 BDDV
036758,000162: 30,2230 02355 ATY
036759,000163: 30,2231 77736 ARCSIN
036760,000164: 30,2232 26363 YAWDUN STOVL YAW
036761,000165: 30,2233 03254 UNFC/2
036762,000166: 30,2234 50256 UNIT DOT
036763,000167: 30,2235 03537 UNIT/R/
036764,000168: 30,2236 65552 SL1 ARCCOS
036765,000169: 30,2237 77676 DCOMP
036766,000170: 30,2240 02365 STORE PITCH
036767,000171: 30,2241 77776 EXIT
036768,000172: 30,2242 05353 TC PHASCHNG
036769,000173: 30,2243 04024 OCT 04024
036770,000174:
036771,000175: 30,2244 05516 TC DOWNFLAG
036772,000176: 30,2245 00213 ADRES FLPI
036773,000177:
036774,000178: 30,2246 00004 INHINT
036775,000179: 30,2247 04674 TC IBNKCALL
036776,000180: 30,2250 40142 CADR PFLITEDB
036777,000181: 30,2251 00003 RELINT
036778,000182:
036779,000183: 30,2252 04635 TC POSTJUMP
036780,000184: 30,2253 74126 CADR BURNBABY
036781,000185:
036782,000186: 30,2254 77745 P12INIT DLOAD # INITIALIZE ENGINE DATA. USED FOR P12 AND
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Page 841 |
036784,000188: 30,2255 16013 (1/DV)A # P71.
036785,000189: 30,2256 03641 STORE 1/DV3
036786,000190: 30,2257 03637 STORE 1/DV2
036787,000191: 30,2260 17635 STODL 1/DV1
036788,000192: 30,2261 16017 (AT)A
036789,000193: 30,2262 16263 STODL AT
036790,000194: 30,2263 16021 (TBUP)A
036791,000195: 30,2264 16271 STODL TBUP
036792,000196: 30,2265 34013 ATDECAY
036793,000197: 30,2266 54276 DCOMP SL
036794,000198: 30,2267 20214 11D
036795,000199: 30,2270 02267 STORE TTO
036796,000200: 30,2271 57535 SLOAD DCOMP
036797,000201: 30,2272 26001 APSVEX
036798,000202: 30,2273 77702 SR2
036799,000203: 30,2274 02265 STORE VE
036800,000204: 30,2275 43414 BOFF RVQ
036801,000205: 30,2276 04747 FLAP
036802,000206: 30,2277 60300 COMMINIT
036803,000207: 30,2300 43345 COMMINIT DLOAD DAD # INITIALIZE TARGET DATA. USED BY P12, P70
036804,000208: 30,2301 25757 HINJECT # AND P71 IF IT DOES NOT FOLLOW P70.
036805,000209: 30,2302 02333 /LAND/
036806,000210: 30,2303 17631 STODL RCO
036807,000211: 30,2304 06522 HI6ZEROS
036808,000212: 30,2305 03654 STORE TXO
036809,000213: 30,2306 03633 STORE YCO
036810,000214: 30,2307 02273 STORE RDOTD
036811,000215: 30,2310 26275 STOVL YDOTD
036812,000216: 30,2311 01563 VRECTCSM
036813,000217: 30,2312 64235 VXV MXV
036814,000218: 30,2313 01555 RRECTCSM
036815,000219: 30,2314 01734 REFSMMAT
036816,000220: 30,2315 77656 UNIT
036817,000221: 30,2316 03720 STORE QAXIS
036818,000222: 30,2317 77616 RVQ
036819,000223: 30,2320 02022 P12ADRES REMADR P12TABLE
036820,000224:
036821,000225: 23,2000 SETLOC P12A
036822,000226: 23,2000 BANK
036823,000227: 23,2432 COUNT* $$/P12
036824,000228:
036825,000229: 23,2432 40220 GUIDINIT STQ SETPD
036826,000230: 23,2433 01164 TEMPR60
036827,000231: 23,2434 00001 0D
036828,000232: 23,2435 41575 VLOAD PUSH
036829,000233: 23,2436 06514 UNITZ
036830,000234: 23,2437 41434 RTB PUSH
036831,000235: 23,2440 21573 LOADTIME
036832,000236: 23,2441 77624 CALL
036833,000237: 23,2442 55716 RP-TO-R
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Page 842 |
036835,000239: 23,2443 74321 MXV VXSC
036836,000240: 23,2444 01734 REFSMMAT
036837,000241: 23,2445 16027 MOONRATE
036838,000242: 23,2446 26325 STOVL WM
036839,000243: 23,2447 02023 RLS
036840,000244: 23,2450 52446 ABVAL SL3
036841,000245: 23,2451 36333 STCALL /LAND/
036842,000246: 23,2452 01164 TEMPR60
036843,000247:
036844,000248: 23,2453 00046 07374 49FPS 2DEC .149352 B-6 # EXPECTED RDOT AT TIPOVER
036845,000249: 23,2455 04145 15527 VINJNOM 2DEC 16.7924 B-7 # 5509.5 FPS(APO=30NM WITH RDOT=19.5FPS)
036846,000250: 23,2457 00007 23346 RDOTDNOM 2DEC .059436 B-7 # 19.5 FPS
036847,000251:
036848,000252:
End of include-file P12.agc. Parent file is MAIN.agc