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 |
021581,000002: # Copyright: Public domain.
021582,000003: # Filename: P76.agc
021583,000004: # Purpose: Part of the source code for Colossus build 237.
021584,000005: # This is for the Command Module's (CM) Apollo Guidance
021585,000006: # Computer (AGC), we believe for Apollo 8.
021586,000007: # Assembler: yaYUL
021587,000008: # Contact: Jim Lawton <jim DOT lawton AT gmail DOT com>
021588,000009: # Website: www.ibiblio.org/apollo/index.html
021589,000010: # Page scans: www.ibiblio.org/apollo/ScansForConversion/Colossus237/
021590,000011: # Mod history: 2011-02-05 JL Adapted from corresponding Colossus 249 file.
021591,000012:
021592,000013: # # Page 500
021593,000014: # 1) PROGRAM NAME - TARGET DELTA V PROGRAM (P76).
021594,000015: # 2) FUNCTIONAL DESCRIPTION - UPON ENTRY BY ASTRONAUT ACTION, P76 FLASHES DSKY REQUESTS TO THE ASTRONAUT
021595,000016: # TO PROVIDE VIA DSKY (1) THE DELTA V TO BE APPLIED TO THE OTHER VEHICLE STATE VECTOR AND (2) THE
021596,000017: # TIME (TIG) AT WHICH THE OTHER VEHICLE VELOCITY WAS CHANGED BY EXECUTION OF A THRUSTING MANEUVER. THE
021597,000018: # OTHER VEHICLE STATE VECTOR IS INTEGRATED TO TIG AND UPDATED BY THE ADDITION OF DELTA V (DELTA V HAVING
021598,000019: # BEEN TRANSFORMED FROM LV TO REF COSYS). USING INTEGRVS, THE PROGRAM THEN INTEGRATES THE OTHER
021599,000020: # VEHICLE STATE VECTOR TO THE STATE VECTOR OF THIS VEHICLE, THUS INSURING THAT THE W-MATRIX AND BOTH VEHICLE
021600,000021: # STATES CORRESPOND TO THE SAME TIME.
021601,000022: # 3) ERASABLE INIITIALIZATION REQUIRED - NONE.
021602,000023: # 4) CALLING SEQUENCES AND EXIT MODES - CALLED BY ASTRONAUT REQUEST THRU DSKY V 37 E 76 E.
021603,000024: # EXITS BY TCF ENDOFJOB.
021604,000025: # 5) OUTPUT - OTHER VEHICLE STATE VECTOR INTEGRATED TO TIG AND INCREMENTED BY DELTA V IN REF COSYS.
021605,000026: # THE PUSHLIST CONTAINS THE MATRIX BY WHICH THE INPUT DELTA V MUST BE POST-MULTIPLIED TO CONVERT FROM LV
021606,000027: # TO REF COSYS.
021607,000028: # 6) DEBRIS - OTHER VEHICLE STATE VECTOR.
021608,000029: # 7) SUBROUTINES CALLED - BANKCALL,GOXDSPF,CSMPREC (OR LEMPREC),ATOPCSM (OR ATOPLEM),INTSTALL,INTWAKE, PHASCHNG
021609,000030: # INTPRET, INTEGRVS, AND MINIRECT.
021610,000031:
021611,000032: # 8) FLAG USE - MOONFLAG,CMOONFLG,INTYPFLG,RASFLAG, AND MARKCTR.
021612,000033:
021613,000034: 30,2000 BANK 30
021614,000035: 13,2000 SETLOC P76LOC
021615,000036: 13,2000 BANK
021616,000037:
021617,000038: 13,2036 COUNT* $$/P76
021618,000039:
021619,000040: 13,2036 E7,1412 EBANK= TIG
021620,000041:
021621,000042: 13,2036 05435 P76 TC UPFLAG
021622,000043: 13,2037 00031 ADRES TRACKFLG
021623,000044:
021624,000045: 13,2040 32163 CAF V06N84 # FLASH LAST DELTA V,
021625,000046: 13,2041 04555 TC BANKCALL # AND WAIT FOR KEYBOARD ACTION.
021626,000047: 13,2042 20624 CADR GOFLASH
021627,000048: 13,2043 12155 TCF ENDP76
021628,000049: 13,2044 02046 TC +2 # PROCEED
021629,000050: 13,2045 02040 TC -5 # STORE DATA AND REPEAT FLASHING
021630,000051: 13,2046 32164 CAF V06N84 +1 # FLASH VERB 06 NOUN 33, DISPLAY LAST TIG,
021631,000052: 13,2047 04555 TC BANKCALL # AND WAIT FOR KEYBOARD ACTION.
021632,000053: 13,2050 20624 CADR GOFLASH
021633,000054: 13,2051 12155 TCF ENDP76
021634,000055: 13,2052 02054 TC +2
021635,000056: 13,2053 02046 TC -5
021636,000057: 13,2054 06006 TC INTPRET # RETURN TO INTERPRETIVE CODE
021637,000058: 13,2055 77745 DLOAD # SET D(MPAC)=TIG IN CSEC B28
021638,000059: 13,2056 03413 TIG
021639,000060: 13,2057 34041 STCALL TDEC1 # SET TDEC1=TIG FOR ORBITAL INTEGRATION
021640,000061: 13,2060 27036 OTHPREC
021641,000062: 13,2061 53575 COMPMAT VLOAD UNIT
021642,000063: 13,2062 00001 RATT
021643,000064: # # Page 501
021644,000065: 13,2063 77676 VCOMP # U(-R)
021645,000066: 13,2064 00031 STORE 24D # U(-R) TO 24D
021646,000067: 13,2065 53435 VXV UNIT # U(-R)XV = U(VXR)
021647,000068: 13,2066 00007 VATT
021648,000069: 13,2067 00023 STORE 18D
021649,000070: 13,2070 53435 VXV UNIT # U(VXR)XU(-R) = U((RXV)XR)
021650,000071: 13,2071 00031 24D
021651,000072: 13,2072 24015 STOVL 12D
021652,000073: 13,2073 03540 DELVOV
021653,000074: 13,2074 76505 VXM VSL1 # V(MPAC)=DELTA V IN REFCOSYS
021654,000075: 13,2075 00015 12D
021655,000076: 13,2076 77655 VAD
021656,000077: 13,2077 00007 VATT
021657,000078: 13,2100 00007 STORE 6 # V(PD6)=VATT + DELTA V
021658,000079: 13,2101 77624 CALL # PREVENT WOULD-BE USER OF ORBITAL
021659,000080: 13,2102 27371 INTSTALL # INTEG FROM INTERFERING WITH UPDATING
021660,000081: 13,2103 77624 CALL
021661,000082: 13,2104 26165 P76SUB1
021662,000083: 13,2105 53775 VLOAD VSR*
021663,000084: 13,2106 00007 6
021664,000085: 13,2107 57176 0,2
021665,000086: 13,2110 25543 STOVL VCV
021666,000087: 13,2111 00001 RATT
021667,000088: 13,2112 77657 VSR*
021668,000089: 13,2113 57176 0,2
021669,000090: 13,2114 15535 STODL RCV
021670,000091: 13,2115 03413 TIG
021671,000092: 13,2116 01517 STORE TET
021672,000093: 13,2117 71214 CLEAR DLOAD
021673,000094: 13,2120 01673 INTYPFLG
021674,000095: 13,2121 01571 TETTHIS
021675,000096: 13,2122 34041 INTOTHIS STCALL TDEC1
021676,000097: 13,2123 27066 INTEGRVS
021677,000098: 13,2124 77624 CALL
021678,000099: 13,2125 27371 INTSTALL
021679,000100: 13,2126 77775 VLOAD
021680,000101: 13,2127 00017 RATT1
021681,000102: 13,2130 01503 STORE RRECT
021682,000103: 13,2131 15535 STODL RCV
021683,000104: 13,2132 00015 TAT
021684,000105: 13,2133 25517 STOVL TET
021685,000106: 13,2134 00025 VATT1
021686,000107: 13,2135 77624 CALL
021687,000108: 13,2136 23360 MINIRECT
021688,000109: 13,2137 77776 EXIT
021689,000110: 13,2140 05301 TC PHASCHNG
021690,000111: 13,2141 04024 OCT 04024
021691,000112:
021692,000113: 13,2142 05435 TC UPFLAG
021693,000114: 13,2143 00236 ADRES REINTFLG
021694,000115:
021695,000116: # # Page 502
021696,000117: 13,2144 06006 TC INTPRET
021697,000118: 13,2145 77624 CALL
021698,000119: 13,2146 26711 ATOPOTH
021699,000120: 13,2147 77531 SSP EXIT
021700,000121: 13,2150 00053 QPRET
021701,000122: 13,2151 26154 OUT
021702,000123: 13,2152 04555 TC BANKCALL # PERMIT USE OF ORBITAL INTEGRATION
021703,000124: 13,2153 27426 CADR INTWAKE1
021704,000125: 13,2154 77776 OUT EXIT
021705,000126: 13,2155 34714 ENDP76 CAF ZERO
021706,000127: 13,2156 55126 TS MARKCTR # CLEAR RR TRACKING MARK COUNTER
021707,000128: 13,2157 55125 TS VHFCNT
021708,000129:
021709,000130: 13,2160 37716 CAF NEGONE
021710,000131: 13,2161 55734 TS MRKBUF2 # INVALIDATE MARK BUFFER
021711,000132:
021712,000133: 13,2162 14106 TCF GOTOPOOH
021713,000134:
021714,000135: 13,2163 01524 V06N84 NV 0684
021715,000136: 13,2164 01441 NV 0633
021716,000137: 13,2165 43174 P76SUB1 AXT,2 SET
021717,000138: 13,2166 00002 2
021718,000139: 13,2167 00063 MOONFLAG # SET MEANS MOON IS SPHERE OF INFLUENCE.
021719,000140: 13,2170 77014 BON AXT,2
021720,000141: 13,2171 04303 CMOONFLG # SET MEANS PERM CM STATE IN LUNAR SPHERE.
021721,000142: 13,2172 00052 QPRET
021722,000143: 13,2173 00000 0
021723,000144: 13,2174 43414 CLEAR RVQ
021724,000145: 13,2175 00263 MOONFLAG
End of include-file P76.agc. Parent file is MAIN.agc