Source Code
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These source-code files were obtained by digitally photographing the
Colossus 237 program listing from the private collection of original
AGC developer Fred Martin, and then modifying pre-existing Colossus 249
(Apollo 9) source files to incorporate changes. Note that the page images
presented online are of reduced quality, and that additional 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 237 OF AGC PROGRAM COLOSSUS BY NASA 2021111-031 1:17 AUG. 24, 1968 |
021342,000002: # Copyright: Public domain.
021343,000003: # Filename: R31.agc
021344,000004: # Purpose: Part of the source code for Colossus build 237.
021345,000005: # This is for the Command Module's (CM) Apollo Guidance
021346,000006: # Computer (AGC), we believe for Apollo 8.
021347,000007: # Assembler: yaYUL
021348,000008: # Contact: Jim Lawton <jim DOT lawton AT gmail DOT com>
021349,000009: # Website: www.ibiblio.org/apollo/index.html
021350,000010: # Page scans: www.ibiblio.org/apollo/ScansForConversion/Colossus237/
021351,000011: # Mod history: 2011-02-05 JL Adapted from corresponding Colossus 249 file.
021352,000012:
021353,000013: # # Page 494
021354,000014: 34,2002 BANK 34
021355,000015: 35,2000 SETLOC R31
021356,000016: 35,2000 BANK
021357,000017:
021358,000018: 35,3150 COUNT* $$/R31
021359,000019:
021360,000020: 35,3150 34752 R31CALL CAF PRIO3
021361,000021: 35,3151 05042 TC FINDVAC
021362,000022: 35,3152 E4,1770 EBANK= SUBEXIT
021363,000023: 35,3152 03204 72064 2CADR V83CALL
021364,000024:
021365,000025: 35,3154 34734 DSPDELAY CAF 1SEC
021366,000026: 35,3155 04555 TC BANKCALL
021367,000027: 35,3156 01730 CADR DELAYJOB
021368,000028: 35,3157 31044 CA EXTVBACT
021369,000029: 35,3160 74677 MASK BIT12
021370,000030: 35,3161 00006 EXTEND
021371,000031: 35,3162 13154 BZF DSPDELAY
021372,000032:
021373,000033: 35,3163 30105 DISPN5X CA FLAGWRD9 # TEST R31FLAG (IN SUNDANCE R31FLAG WILL
021374,000034: 35,3164 74707 MASK BIT4 # ALWAYS BE SET AS R34 DOES NOT EXIST)
021375,000035: 35,3165 00006 EXTEND
021376,000036: 35,3166 13171 BZF +3
021377,000037: 35,3167 33310 CAF V16N54 # R31 USE NOUN 54
021378,000038: 35,3170 03172 TC +2
021379,000039: 35,3171 33311 CAF V16N53 # R34 USE NOUN 53
021380,000040: 35,3172 04555 TC BANKCALL
021381,000041: 35,3173 20465 CADR GOMARKF
021382,000042: 35,3174 05514 TC B5OFF
021383,000043: 35,3175 05514 TC B5OFF
021384,000044: 35,3176 13163 TCF DISPN5X
021385,000045:
021386,000046: 35,3177 06006 V83 TC INTPRET
021387,000047: 35,3200 77624 CALL
021388,000048: 35,3201 73426 REDOEXTP
021389,000049: 35,3202 77650 GOTO
021390,000050: 35,3203 73207 COMPDISP
021391,000051: 35,3204 06006 V83CALL TC INTPRET
021392,000052: 35,3205 77624 CALL
021393,000053: 35,3206 73312 STATEXTP # EXTRAPOLATE STATE VECTORS
021394,000054: 35,3207 52375 COMPDISP VLOAD VSU
021395,000055: 35,3210 00001 RATT
021396,000056: 35,3211 02327 RONE
021397,000057: 35,3212 51406 PUSH ABVAL # RATT-RONE TO 0D PD= 6
021398,000058: 35,3213 02321 STORE RANGE # METERS B-29
021399,000059: 35,3214 77301 NORM VLOAD
021400,000060: 35,3215 00047 X1 # RATT-RONE PD= 0
021401,000061: 35,3216 77762 VSR1
021402,000062: 35,3217 53457 VSL* UNIT
021403,000063: # # Page 495
021404,000064: 35,3220 20201 0,1
021405,000065: 35,3221 52315 PDVL VSU # UNIT(LOS) TO 0D PD= 6
021406,000066: 35,3222 00007 VATT
021407,000067: 35,3223 02335 VONE
021408,000068: 35,3224 77641 DOT # (VATT-VONE).UNIT(LOS) PD= 0
021409,000069: 35,3225 77752 SL1
021410,000070: 35,3226 36323 STCALL RRATE # RANGE RATE M/CS B-7
021411,000071: 35,3227 47432 CDUTRIG # TO INITIALIZE FOR *NBSM*
021412,000072: 35,3230 77624 CALL
021413,000073: 35,3231 62000 R34LOS # NOTE. PDL MUST = 0.
021414,000074: 35,3232 53575 R34ANG VLOAD UNIT
021415,000075: 35,3233 02327 RONE
021416,000076: 35,3234 77715 PDVL # UR TO 0D PD= 6
021417,000077: 35,3235 15330 THISAXIS # UNITX FOR CM, UNITZ FOR LM
021418,000078: 35,3236 77214 BON VLOAD # CHK R31FLAG. ON=R31 THETA, OFF=R34 PHI
021419,000079: 35,3237 04713 R31FLAG
021420,000080: 35,3240 73242 +2 # R31-THETA
021421,000081: 35,3241 00015 12D
021422,000082: 35,3242 77624 CALL
021423,000083: 35,3243 47601 *NBSM*
021424,000084: 35,3244 41505 VXM PUSH # UXORZ TO 6D PD=12D
021425,000085: 35,3245 01736 REFSMMAT
021426,000086: 35,3246 72431 VPROJ VSL2
021427,000087: 35,3247 00001 0D
021428,000088: 35,3250 53445 BVSU UNIT
021429,000089: 35,3251 00007 6D
021430,000090: 35,3252 47315 PDVL VXV # UP/2 TO 12D PD=18D
021431,000091: 35,3253 02327 RONE
021432,000092: 35,3254 02335 VONE
021433,000093: 35,3255 47256 UNIT VXV
021434,000094: 35,3256 02327 RONE
021435,000095: 35,3257 63241 DOT PDVL # SIGN TO 12D, UP/2 TO MPAC PD=18D
021436,000096: 35,3260 00015 12D
021437,000097: 35,3261 50372 VSL1 DOT # UP.UXORZ
021438,000098: 35,3262 00007 6D
021439,000099: 35,3263 72565 SIGN SL1
021440,000100: 35,3264 00015 12D
021441,000101: 35,3265 77726 ACOS
021442,000102: 35,3266 26325 STOVL RTHETA
021443,000103: 35,3267 02327 RONE
021444,000104: 35,3270 51041 DOT BPL
021445,000105: 35,3271 00007 6D
021446,000106: 35,3272 73277 +5
021447,000107: 35,3273 44345 DLOAD BDSU # IF UXORZ.R NEG, RTHETA = 1 - RTHETA
021448,000108: 35,3274 02325 RTHETA
021449,000109: 35,3275 15340 DPPOSMAX
021450,000110: 35,3276 02325 STORE RTHETA # RTHETA BETWEEN 0 AND 1 REV.
021451,000111: 35,3277 77776 EXIT
021452,000112: 35,3300 34706 CAF BIT5 # HAVE WE BEEN ANSWERED
021453,000113: 35,3301 71044 MASK EXTVBACT
021454,000114: # # Page 496
021455,000115: 35,3302 00006 EXTEND
021456,000116: 35,3303 15423 BZF ENDEXT # YES, DIE
021457,000117:
021458,000118: 35,3304 41044 CS EXTVBACT
021459,000119: 35,3305 74677 MASK BIT12
021460,000120: 35,3306 27044 ADS EXTVBACT
021461,000121:
021462,000122: 35,3307 13177 TCF V83
021463,000123: 35,3310 04066 V16N54 VN 1654
021464,000124: 35,3311 04065 V16N53 VN 1653
021465,000125:
021466,000126: # # Page 497
021467,000127: # THE STATEXTP SUBROUTINE DOES A PRECISION EXTRAPOLATION OF BOTH VEHICLES
021468,000128: # STATE VECTORS TO PRESENT TIME AND SAVES THEM AS BASE VECTORS.
021469,000129: # IF SERVICER IS OFF ---
021470,000130: # THIS VEHICLES BASE VECTOR IS CONIC EXTRAPOLATED TO
021471,000131: # PRESENT TIME AND SAVED AS RONE, VONE.
021472,000132: # THE OTHER VEHICLES BASE VECTOR IS CONIC EXTRAPOLATED
021473,000133: # TO THE SAME TIME, THE OUTPUT BEING LEFT IN RATT, VATT.
021474,000134: # IF SERVICER IS ON ---
021475,000135: # RONE, VONE ARE SET EQUAL TO RN, VN AND THE OTHER
021476,000136: # VEHICLES STATE VECTOR IS PREC. EXTRAPOLATED TO PIPTIME.
021477,000137: 35,3312 47020 STATEXTP STQ RTB
021478,000138: 35,3313 02274 STATEXIT
021479,000139: 35,3314 45505 LOADTIME
021480,000140: 35,3315 34041 STCALL TDEC1
021481,000141: 35,3316 27036 OTHPREC # GET BASE VECTORS
021482,000142: 35,3317 77775 VLOAD
021483,000143: 35,3320 00017 RATT1
021484,000144: 35,3321 26225 STOVL BASEOTP # OTHER POS.
021485,000145: 35,3322 00025 VATT1
021486,000146: 35,3323 16241 STODL BASEOTV # OTHER VEL.
021487,000147: 35,3324 00015 TAT
021488,000148: 35,3325 02272 STORE BASETIME
021489,000149: 35,3326 34041 STCALL TDEC1
021490,000150: 35,3327 27022 THISPREC
021491,000151: 35,3330 77775 VLOAD
021492,000152: 35,3331 00017 RATT1
021493,000153: 35,3332 26255 STOVL BASETHP # THIS POS.
021494,000154: 35,3333 00025 VATT1
021495,000155: 35,3334 02263 STORE BASETHV # THIS VEL
021496,000156: 35,3335 47014 HAVEBASE BON RTB
021497,000157: 35,3336 03711 V37FLAG
021498,000158: 35,3337 73413 GETRVN # IF AVG ON ,GET RN ETC.
021499,000159: 35,3340 45505 LOADTIME
021500,000160: 35,3341 34041 STCALL TDEC1 # BEGIN SET UP FOR CONIT EXTRAP. FOR THIS.
021501,000161: 35,3342 27371 INTSTALL
021502,000162: 35,3343 43175 VLOAD CLEAR
021503,000163: 35,3344 02255 BASETHP
021504,000164: 35,3345 00263 MOONFLAG
021505,000165: 35,3346 25535 STOVL RCV
021506,000166: 35,3347 02263 BASETHV
021507,000167: 35,3350 15543 STODL VCV
021508,000168: 35,3351 02272 BASETIME
021509,000169: 35,3352 43014 BOF SET # GET APPROPRIATE MOONFLAG SETTING
021510,000170: 35,3353 04343 MOONTHIS
021511,000171: 35,3354 73356 +2
021512,000172: 35,3355 00063 MOONFLAG
021513,000173: 35,3356 77614 SET
021514,000174: 35,3357 01473 INTYPFLG # CONIC EXTRAP.
021515,000175: 35,3360 35517 STCALL TET
021516,000176: 35,3361 27066 INTEGRVS # INTEGRATION --- AT LAST ---
021517,000177: # # Page 498
021518,000178: 35,3362 77775 VLOAD
021519,000179: 35,3363 00001 RATT
021520,000180: 35,3364 26327 STOVL RONE
021521,000181: 35,3365 00007 VATT
021522,000182: 35,3366 36335 STCALL VONE # GET SET FOR CONIC EXTRAP.,OTHER.
021523,000183: 35,3367 27371 INTSTALL
021524,000184: 35,3370 71214 SET DLOAD
021525,000185: 35,3371 01473 INTYPFLG
021526,000186: 35,3372 00015 TAT
021527,000187: 35,3373 00041 OTHINT STORE TDEC1
021528,000188: 35,3374 43175 VLOAD CLEAR
021529,000189: 35,3375 02225 BASEOTP
021530,000190: 35,3376 00263 MOONFLAG
021531,000191: 35,3377 25535 STOVL RCV
021532,000192: 35,3400 02241 BASEOTV
021533,000193: 35,3401 15543 STODL VCV
021534,000194: 35,3402 02272 BASETIME
021535,000195: 35,3403 43014 BOF SET
021536,000196: 35,3404 04343 MOONTHIS
021537,000197: 35,3405 73407 +2
021538,000198: 35,3406 00063 MOONFLAG
021539,000199: 35,3407 35517 STCALL TET
021540,000200: 35,3410 27066 INTEGRVS
021541,000201: 35,3411 77650 GOTO
021542,000202: 35,3412 02274 STATEXIT # THIS VEHICLES POS.,VEL. IN PUSHLIST.
021543,000203:
021544,000204: 35,3413 77775 GETRVN VLOAD
021545,000205: 35,3414 01171 RN
021546,000206: 35,3415 26327 STOVL RONE
021547,000207: 35,3416 01177 VN
021548,000208: 35,3417 16335 STODL VONE
021549,000209: 35,3420 01205 PIPTIME
021550,000210: 35,3421 77624 CALL
021551,000211: 35,3422 27371 INTSTALL
021552,000212: 35,3423 52014 CLEAR GOTO
021553,000213: 35,3424 01673 INTYPFLG # PREC EXTRAP FOR OTHER
021554,000214: 35,3425 73373 OTHINT
021555,000215:
021556,000216: 35,3426 52020 REDOEXTP STQ GOTO
021557,000217: 35,3427 02274 STATEXIT
021558,000218: 35,3430 73335 HAVEBASE
021559,000219: 31,2000 SETLOC R34
021560,000220: 31,2000 BANK
021561,000221: 31,2000 77776 R34LOS EXIT
021562,000222: 31,2001 30036 CA CDUS
021563,000223: 31,2002 50120 INDEX FIXLOC
021564,000224: 31,2003 54011 TS 9D
021565,000225: 31,2004 30035 CA CDUT
021566,000226: 31,2005 50120 INDEX FIXLOC
021567,000227: 31,2006 54013 TS 11D
021568,000228: # # Page 499
021569,000229: 31,2007 30120 CA FIXLOC
021570,000230: 31,2010 66211 AD SIX
021571,000231: 31,2011 40000 COM
021572,000232: 31,2012 50120 INDEX FIXLOC
021573,000233: 31,2013 54046 TS X1
021574,000234: 31,2014 06006 TC INTPRET
021575,000235: 31,2015 77624 CALL
021576,000236: 31,2016 46000 SXTNB
021577,000237: 31,2017 34015 STCALL 12D
021578,000238: 31,2020 73232 R34ANG
End of include-file R31.agc. Parent file is MAIN.agc