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 Colossus 249 (Apollo 9)
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 055 OF AGC PROGRAM COMANCHE BY NASA 2021113-051 10:28 APR. 1,1969Note that the date is the date of the printout, not the date of the program revision. |
021963,000002: ## Copyright: Public domain.
021964,000003: ## Filename: R31.agc
021965,000004: ## Purpose: Part of the source code for Comanche, build 055. It
021966,000005: ## is part of the source code for the Command Module's
021967,000006: ## (CM) Apollo Guidance Computer (AGC), Apollo 11.
021968,000007: ## Assembler: yaYUL
021969,000008: ## Reference: pp. 505-510
021970,000009: ## Contact: Onno Hommes <ohommes@cmu.edu>
021971,000010: ## Website: http://www.ibiblio.org/apollo.
021972,000011: ## Mod history: 2009-05-11 OH Batch 2 Assignment Comanche Transcription
021973,000012: ## 2009-05-20 RSB Corrected INSTALL -> INTSTALL
021974,000013: ## 2016-12-10 RSB Proofed comments with octopus/ProoferComments
021975,000014: ## and fixed the errors found.
021976,000015: ## 2017-01-18 RSB Fixed comment-text errors noted while diff'ing
021977,000016: ## vs Colossus 249.
021978,000017: ## 2017-02-08 RSB Comment-text fixes identified in proofing Artemis 72.
021979,000018: ## 2017-03-17 RSB Comment-text fixes identified by 4-way diff'ing
021980,000019: ## of Colossus 237 & 249, Comanche 55, and Artemis 72.
021981,000020:
021982,000021: ## The contents of the "Comanche055" files, in general, are transcribed
021983,000022: ## from scanned documents.
021984,000023: ##
021985,000024: ## Assemble revision 055 of AGC program Comanche by NASA
021986,000025: ## 2021113-051. April 1, 1969.
021987,000026: ##
021988,000027: ## This AGC program shall also be referred to as Colossus 2A
021989,000028: ##
021990,000029: ## Prepared by
021991,000030: ## Massachusetts Institute of Technology
021992,000031: ## 75 Cambridge Parkway
021993,000032: ## Cambridge, Massachusetts
021994,000033: ##
021995,000034: ## under NASA contract NAS 9-4065.
021996,000035: ##
021997,000036: ## Refer directly to the online document mentioned above for further
021998,000037: ## information. Please report any errors to info@sandroid.org.
021999,000038:
022000,000039:
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Page 505 |
022002,000041: 34,2002 BANK 34
022003,000042: 31,2000 SETLOC R31
022004,000043: 31,2000 BANK
022005,000044:
022006,000045: 31,2000 COUNT* $$/R31
022007,000046:
022008,000047: 31,2000 35057 R31CALL CAF PRIO3
022009,000048: 31,2001 05147 TC FINDVAC
022010,000049: 31,2002 E4,1770 EBANK= SUBEXIT
022011,000050: 31,2002 02032 62064 2CADR V83CALL
022012,000051:
022013,000052: 31,2004 35041 DSPDELAY CAF 1SEC
022014,000053: 31,2005 04662 TC BANKCALL
022015,000054: 31,2006 01732 CADR DELAYJOB
022016,000055: 31,2007 31044 CA EXTVBACT
022017,000056: 31,2010 75004 MASK BIT12
022018,000057: 31,2011 00006 EXTEND
022019,000058: 31,2012 12004 BZF DSPDELAY
022020,000059:
022021,000060: 31,2013 30105 DISPN5X CA FLAGWRD9 # TEST R31FLAG (IN SUNDANCE R31FLAG WILL
022022,000061: 31,2014 75014 MASK BIT4 # ALWAYS BE SET AS R34 DOES NOT EXIST)
022023,000062: 31,2015 00006 EXTEND
022024,000063: 31,2016 12021 BZF +3
022025,000064: 31,2017 32136 CAF V16N54 # R31 USE NOUN 54
022026,000065: 31,2020 02022 TC +2
022027,000066: 31,2021 32137 CAF V16N53 # R34 USE NOUN 53
022028,000067: 31,2022 04662 TC BANKCALL
022029,000068: 31,2023 20561 CADR GOMARKF
022030,000069: 31,2024 05625 TC B5OFF
022031,000070: 31,2025 05625 TC B5OFF
022032,000071: 31,2026 12013 TCF DISPN5X
022033,000072:
022034,000073: 31,2027 06006 V83 TC INTPRET
022035,000074: 31,2030 77650 GOTO
022036,000075: 31,2031 62171 HAVEBASE # INTEG STATE VECTORS
022037,000076: 31,2032 06006 V83CALL TC INTPRET
022038,000077: 31,2033 77650 GOTO
022039,000078: 31,2034 62140 STATEXTP # EXTRAPOLATE STATE VECTORS
022040,000079: 31,2035 52375 COMPDISP VLOAD VSU
022041,000080: 31,2036 00001 RATT
022042,000081: 31,2037 02327 RONE
022043,000082: 31,2040 51406 PUSH ABVAL # RATT-RONE TO 0D PD= 6
022044,000083: 31,2041 02321 STORE RANGE # METERS B-29
022045,000084: 31,2042 77301 NORM VLOAD
022046,000085: 31,2043 00047 X1 # RATT-RONE PD= 0
022047,000086: 31,2044 77762 VSR1
022048,000087: 31,2045 53457 VSL* UNIT
022049,000088: 31,2046 20201 0,1
022050,000089: 31,2047 52315 PDVL VSU # UNIT(LOS) TO 0D PD= 6
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Page 506 |
022052,000091: 31,2050 00007 VATT
022053,000092: 31,2051 02335 VONE
022054,000093: 31,2052 77641 DOT # (VATT-VONE).UNIT(LOS) PD= 0
022055,000094: 31,2053 77752 SL1
022056,000095: 31,2054 36323 STCALL RRATE # RANGE RATE M/CS B-7
022057,000096: 31,2055 47477 CDUTRIG # TO INITIALIZE FOR *NBSM*
022058,000097: 31,2056 77624 CALL
022059,000098: 31,2057 62311 R34LOS # NOTE. PDL MUST = 0.
022060,000099: 31,2060 53575 R34ANG VLOAD UNIT
022061,000100: 31,2061 02327 RONE
022062,000101: 31,2062 77715 PDVL # UR TO 0D PD= 6
022063,000102: 31,2063 15333 THISAXIS # UNITX FOR CM, UNITZ FOR LM
022064,000103: 31,2064 77214 BON VLOAD # CHK R31FLAG. ON=R31 THETA, OFF=R34 PHI
022065,000104: 31,2065 04713 R31FLAG
022066,000105: 31,2066 62070 +2 # R31-THETA
022067,000106: 31,2067 00015 12D
022068,000107: 31,2070 77624 CALL
022069,000108: 31,2071 47646 *NBSM*
022070,000109: 31,2072 41505 VXM PUSH # UXORZ TO 6D PD=12D
022071,000110: 31,2073 01736 REFSMMAT
022072,000111: 31,2074 72431 VPROJ VSL2
022073,000112: 31,2075 00001 0D
022074,000113: 31,2076 53445 BVSU UNIT
022075,000114: 31,2077 00007 6D
022076,000115: 31,2100 47315 PDVL VXV # UP/2 TO 12D PD=18D
022077,000116: 31,2101 02327 RONE
022078,000117: 31,2102 02335 VONE
022079,000118: 31,2103 47256 UNIT VXV
022080,000119: 31,2104 02327 RONE
022081,000120: 31,2105 63241 DOT PDVL # SIGN TO 12D, UP/2 TO MPAC PD=18D
022082,000121: 31,2106 00015 12D
022083,000122: 31,2107 50372 VSL1 DOT # UP.UXORZ
022084,000123: 31,2110 00007 6D
022085,000124: 31,2111 72565 SIGN SL1
022086,000125: 31,2112 00015 12D
022087,000126: 31,2113 77726 ACOS
022088,000127: 31,2114 26325 STOVL RTHETA
022089,000128: 31,2115 02327 RONE
022090,000129: 31,2116 51041 DOT BPL
022091,000130: 31,2117 00007 6D
022092,000131: 31,2120 62125 +5
022093,000132: 31,2121 44345 DLOAD BDSU # IF UXORZ.R NEG, RTHETA = 1 - RTHETA
022094,000133: 31,2122 02325 RTHETA
022095,000134: 31,2123 15343 DPPOSMAX
022096,000135: 31,2124 02325 STORE RTHETA # RTHETA BETWEEN 0 AND 1 REV.
022097,000136: 31,2125 77776 EXIT
022098,000137: 31,2126 35013 CAF BIT5 # HAVE WE BEEN ANSWERED
022099,000138: 31,2127 71044 MASK EXTVBACT
022100,000139: 31,2130 00006 EXTEND
022101,000140: 31,2131 15534 BZF ENDEXT # YES, DIE
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Page 507 |
022103,000142: 31,2132 41044 CS EXTVBACT
022104,000143: 31,2133 75004 MASK BIT12
022105,000144: 31,2134 27044 ADS EXTVBACT
022106,000145:
022107,000146: 31,2135 12027 TCF V83
022108,000147: 31,2136 04066 V16N54 VN 1654
022109,000148: 31,2137 04065 V16N53 VN 1653
022110,000149:
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Page 508 |
022112,000151: # STATEXTP DOES AN INITIAL PRECISION EXTRAPOLATION OF THE
022113,000152: # LEM STATE VECTOR TO PRESENT TIME OR TO PIPTIME IF AV G
022114,000153: # IS ON AND SAVES AS BASE VECTOR. IF AV G IS ON RN + VN
022115,000154: # ARE USED AS THE CM STATE VECTOR AND THE INITIAL R RDOT
022116,000155: # RTHETA ARE COMPUTED WITH NO FURTHER INTEGRATION. IF AV
022117,000156: # G IS OFF A PRECISION EXTRAPOLATION IS MADE OF THE CM
022118,000157: # STATE VECTOR TO PRESENT TIME AND.....
022119,000158:
022120,000159: # THE CM + LM STATE VECTORS ARE INTEGRATED TO PRES TIME
022121,000160: # USING PRECISION OR CONIC AS SURFFLAG IS SET OR CLEAR.
022122,000161:
022123,000162: # IF AV G IS ON THEN SUBSEQUENT PASSES WILL PROVIDE
022124,000163: # USE OF RN + VN AS CM STATE VECTOR AND THE LM STATE
022125,000164: # VECTOR WILL BE PRECISION INTEGRATED USING LEMPREC
022126,000165:
022127,000166: # IF SURFFLAG IS SET.
022128,000167: # CM STATE VECTOR RONE VONE + LM STATE VECTOR RATT
022129,000168: # VATT ARE USED IN COMPUTING R RDOT RTHETA.
022130,000169:
022131,000170:
022132,000171: 31,2140 43034 STATEXTP RTB BOF # INITIAL INTEGRATION
022133,000172: 31,2141 45510 LOADTIME
022134,000173: 31,2142 03751 V37FLAG
022135,000174: 31,2143 62146 +3 # AV G OFF, USE PRES TIME
022136,000175: 31,2144 77624 CALL
022137,000176: 31,2145 62273 GETRVN # ON, USE RN VN PIPTIME
022138,000177: 31,2146 02343 STORE BASETIME # PRES TIME OR PIPTIME
022139,000178: 31,2147 34041 STCALL TDEC1
022140,000179: 31,2150 27105 LEMPREC
022141,000180: 31,2151 77775 VLOAD # BASE VECTOR, LM
022142,000181: 31,2152 00017 RATT1
022143,000182: 31,2153 26225 STOVL BASEOTP # POS.
022144,000183: 31,2154 00025 VATT1
022145,000184: 31,2155 02241 STORE BASEOTV # VEL.
022146,000185: 31,2156 71214 BON DLOAD
022147,000186: 31,2157 03711 V37FLAG
022148,000187: 31,2160 62035 COMPDISP # COMPUTE R RDOT RTHETA FROM
022149,000188: # RONE(RN) VONE(VN) RATT+VATT(LEMPREC)
022150,000189: 31,2161 00015 TAT
022151,000190: 31,2162 34041 STCALL TDEC1
022152,000191: 31,2163 27071 CSMPREC
022153,000192: 31,2164 77775 VLOAD # BASE VECTOR, CM
022154,000193: 31,2165 00017 RATT1
022155,000194: 31,2166 26255 STOVL BASETHP # POS.
022156,000195: 31,2167 00025 VATT1
022157,000196: 31,2170 02263 STORE BASETHV # VEL.
022158,000197: 31,2171 47014 HAVEBASE BON RTB # SUBSEQUENT INTEGRATIONS
022159,000198: 31,2172 03711 V37FLAG
022160,000199: 31,2173 62256 GETRVN5
022161,000200: 31,2174 45510 LOADTIME
022162,000201: 31,2175 34041 STCALL TDEC1 # AV G OFF. SET INTEG. OF CM
022163,000202: 31,2176 27442 INTSTALL
022164,000203: 31,2177 43175 VLOAD CLEAR
022165,000204: 31,2200 02255 BASETHP
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Page 509 |
022167,000206: 31,2201 00263 MOONFLAG
022168,000207: 31,2202 25535 STOVL RCV
022169,000208: 31,2203 02263 BASETHV
022170,000209: 31,2204 15543 STODL VCV
022171,000210: 31,2205 02343 BASETIME
022172,000211: 31,2206 43014 BOF SET # GET APPROPRIATE MOONFLAG SETTING
022173,000212: 31,2207 04343 MOONTHIS
022174,000213: 31,2210 62212 +2
022175,000214: 31,2211 00063 MOONFLAG
022176,000215: 31,2212 77614 CLEAR
022177,000216: 31,2213 01673 INTYPFLG
022178,000217: 31,2214 43014 BON SET
022179,000218: 31,2215 04307 SURFFLAG
022180,000219: 31,2216 62220 +2 # PREC. IF LM DOWN
022181,000220: 31,2217 01473 INTYPFLG # CONIC IF LM NOT DOWN
022182,000221: 31,2220 35517 STCALL TET
022183,000222: 31,2221 27135 INTEGRVS # INTEGRATION --- AT LAST---
022184,000223: 31,2222 77775 VLOAD
022185,000224: 31,2223 00001 RATT
022186,000225: 31,2224 26327 STOVL RONE
022187,000226: 31,2225 00007 VATT
022188,000227: 31,2226 16335 STODL VONE # GET SET FOR CONIC EXTRAP.,OTHER
022189,000228: 31,2227 00015 TAT
022190,000229: 31,2230 45014 BON CALL
022191,000230: 31,2231 04307 SURFFLAG
022192,000231: 31,2232 62267 GETRVN6 # LEMPREC IF LM DOWN
022193,000232: 31,2233 27442 INTSTALL # ..CONIC IF NOT DOWN
022194,000233: 31,2234 77614 SET
022195,000234: 31,2235 01473 INTYPFLG
022196,000235: 31,2236 00041 OTHINT STORE TDEC1 # ENTERED IF AV G ON TO INTEG LM
022197,000236: 31,2237 43175 VLOAD CLEAR
022198,000237: 31,2240 02225 BASEOTP
022199,000238: 31,2241 00263 MOONFLAG
022200,000239: 31,2242 25535 STOVL RCV
022201,000240: 31,2243 02241 BASEOTV
022202,000241: 31,2244 15543 STODL VCV
022203,000242: 31,2245 02343 BASETIME
022204,000243: 31,2246 43014 BOF SET
022205,000244: 31,2247 04343 MOONTHIS
022206,000245: 31,2250 62252 +2
022207,000246: 31,2251 00063 MOONFLAG
022208,000247: 31,2252 35517 STCALL TET
022209,000248: 31,2253 27135 INTEGRVS
022210,000249: 31,2254 77650 GOTO
022211,000250: 31,2255 62035 COMPDISP # COMPUTE R RDOT RTHETA
022212,000251: 31,2256 77624 GETRVN5 CALL # AV G ON
022213,000252: 31,2257 62273 GETRVN
022214,000253: 31,2260 45014 BON CALL
022215,000254: 31,2261 04307 SURFFLAG
022216,000255: 31,2262 62267 GETRVN6 # LM DOWN, LMPREC
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Page 510 |
022218,000257: 31,2263 27442 INTSTALL
022219,000258: 31,2264 52014 CLEAR GOTO
022220,000259: 31,2265 01673 INTYPFLG
022221,000260: 31,2266 62236 OTHINT
022222,000261: 31,2267 34041 GETRVN6 STCALL TDEC1
022223,000262: 31,2270 27105 LEMPREC
022224,000263: 31,2271 77650 GOTO
022225,000264: 31,2272 62035 COMPDISP # COMPUTE R RDOT RTHETA
022226,000265: 31,2273 77620 GETRVN STQ
022227,000266: 31,2274 00000 0D
022228,000267: 31,2275 52175 VLOAD GOTO # AV G ON, RONE = RN VONE = VN
022229,000268: 31,2276 01171 RN # AND USE PIPTIME
022230,000269: 31,2277 62300 +1
022231,000270: 31,2300 36327 STCALL RONE
022232,000271: 31,2301 62302 +1
022233,000272: 31,2302 52175 VLOAD GOTO
022234,000273: 31,2303 01177 VN
022235,000274: 31,2304 62305 +1
022236,000275: 31,2305 16335 STODL VONE
022237,000276: 31,2306 01205 PIPTIME
022238,000277: 31,2307 77650 GOTO
022239,000278: 31,2310 00000 0D
022240,000279: 31,2000 SETLOC R34
022241,000280: 31,2000 BANK
022242,000281: 31,2311 77776 R34LOS EXIT
022243,000282: 31,2312 30036 CA CDUS
022244,000283: 31,2313 50120 INDEX FIXLOC
022245,000284: 31,2314 54011 TS 9D
022246,000285: 31,2315 30035 CA CDUT
022247,000286: 31,2316 50120 INDEX FIXLOC
022248,000287: 31,2317 54013 TS 11D
022249,000288: 31,2320 30120 CA FIXLOC
022250,000289: 31,2321 66211 AD SIX
022251,000290: 31,2322 40000 COM
022252,000291: 31,2323 50120 INDEX FIXLOC
022253,000292: 31,2324 54046 TS X1
022254,000293: 31,2325 06006 TC INTPRET
022255,000294: 31,2326 77624 CALL
022256,000295: 31,2327 46000 SXTNB
022257,000296: 31,2330 34015 STCALL 12D
022258,000297: 31,2331 62060 R34ANG
End of include-file R31.agc. Parent file is MAIN.agc