Source Code

022106,000001: # Copyright: Public domain. 022107,000002: # Filename: P76.agc 022108,000003: # Purpose: Part of the source code for Colossus 2A, AKA Comanche 055. 022109,000004: # It is part of the source code for the Command Module's (CM) 022110,000005: # Apollo Guidance Computer (AGC), for Apollo 11. 022111,000006: # Assembler: yaYUL 022112,000007: # Contact: Hartmuth Gutsche <hgutsche@xplornet.com>. 022113,000008: # Website: www.ibiblio.org/apollo. 022114,000009: # Pages: pp 511-513 022115,000010: # Mod history: 2009-05-08 HG Adapting from the Luminary131/ file 022116,000011: # of the same name, using Comanche055 page 022117,000012: # images 0511.jpg - 0513.jpg. 022118,000013: 022119,000014: # This source code has been transcribed or otherwise adapted from digitized 022120,000015: # images of a hardcopy from the MIT Museum. The digitization was performed 022121,000016: # by Paul Fjeld, and arranged for by Deborah Douglas of the Museum. Many 022122,000017: # thanks to both. The images (with suitable reduction in storage size and 022123,000018: # consequent reduction in image quality as well) are available online at 022124,000019: # www.ibiblio.org/apollo. If for some reason you find that the images are 022125,000020: # illegible, contact me at info@sandroid.org about getting access to the 022126,000021: # (much) higher-quality images which Paul actually created. 022127,000022: 022128,000023: # Notations on the hardcopy document read, in part: 022129,000024: 022130,000025: # Assemble revision 055 of AGC program Comanche by NASA 022131,000026: # 2021113-051. 10:28 APR. 1, 1969 022132,000027: 022133,000028: # This AGC program shall also be referred to as 022134,000029: # Colossus 2A 022135,000030: 022136,000031: # Page 511 022137,000032: # 1) PROGRAM NAME -- TARGET DELTA V PROGRAM (P76). 022138,000033: # 2) FUNCTIONAL DESCRIPTION -- UPON ENTRY BY ASTRONAUT ACTION, P76 FLASHES DSKY REQUESTS TO THE ASTRONAUT 022139,000034: # TO PROVIDE VIA DSKY (1) THE DELTA V TO BE APPLIED TO THE OTHER VEHICLE STATE VECTOR AND (2) THE 022140,000035: # TIME (TIG) AT WHICH THE OTHER VEHICLE VELOCITY WAS CHANGED BY EXECUTION OF A THRUSTING MANEUVER. THE 022141,000036: # OTHER VEHICLE STATE VECTOR IS INTEGRATED TO TIG AND UPDATED BY THE ADDITION OF DELTA V (DELTA V HAVING 022142,000037: # BEEN TRANSFORMED FROM LV TO REF COSYS). USING INTEGRVS, THE PROGRAM THEN INTEGRATES THE OTHER 022143,000038: # VEHICLE STATE VECTOR TO THE STATE VECTOR OF THIS VEHICLE, THUS INSURING THAT THE W-MATRIX AND BOTH VEHICLE 022144,000039: # STATES CORRESPOND TO THE SAME TIME. 022145,000040: # 3) ERASABLE INIITIALIZATION REQUIRED -- NONE. 022146,000041: # 4) CALLING SEQUENCES AND EXIT MODES -- CALLED BY ASTRONAUT REQUEST THRU DSKY V 37 E 76E. 022147,000042: # EXITS BY TCF ENDOFJOB. 022148,000043: # 5) OUTPUT -- OTHER VEHICLE STATE VECTOR INTEGRATED TO TIG AND INCREMENTED BY DELTA V IN REF COSYS. 022149,000044: # THE PUSHLIST CONTAINS THE MATRIX BY WHICH THE INPUT DELTA V MUST BE POST-MULTIPLIED TO CONVERT FROM LV 022150,000045: # TO REF COSYS. 022151,000046: # 6) DEBRIS -- OTHER VEHICLE STATE VECTOR. 022152,000047: # 7) SUBROUTINES CALLED -- BANKCALL, GOXDSPF, CSMPREC (OR LEMPREC), ATOPCSM (OR ATOPLEM), INTSTALL, INTWAKE, PHASCHNG 022153,000048: # INTPRET, INTEGRVS, AND MINIRECT. 022154,000049: # 8) FLAG USE -- MOONFLAG, CMOONFLG, INTYPFLG, RASFLAG, AND MARKCTR. 022155,000050: 022156,000051: 30,2000 BANK 30 022157,000052: 13,2000 SETLOC P76LOC 022158,000053: 13,2000 BANK 022159,000054: 022160,000055: 13,2071 COUNT* $$/P76 022161,000056: 022162,000057: 13,2071 E7,1412 EBANK= TIG 022163,000058: 022164,000059: 13,2071 05546 P76 TC UPFLAG 022165,000060: 13,2072 00031 ADRES TRACKFLG 022166,000061: 022167,000062: 13,2073 32220 CAF V06N84 # FLASH LAST DELTA V. 022168,000063: 13,2074 04662 TC BANKCALL # AND WAIT FOR KEYBOARD ACTION. 022169,000064: 13,2075 20720 CADR GOFLASH 022170,000065: 13,2076 12212 TCF ENDP76 022171,000066: 13,2077 02101 TC +2 # PROCEED 022172,000067: 13,2100 02073 TC -5 # STORE DATA AND REPEAT FLASHING 022173,000068: 13,2101 32221 CAF V06N84 +1 # FLASH VERB 06 NOUN 33, DISPLAY LAST TIG, 022174,000069: 13,2102 04662 TC BANKCALL # AND WAIT FOR KEYBOARD ACTION. 022175,000070: 13,2103 20720 CADR GOFLASH 022176,000071: 13,2104 12212 TCF ENDP76 022177,000072: 13,2105 02107 TC +2 022178,000073: 13,2106 02101 TC -5 022179,000074: 13,2107 06006 TC INTPRET # RETURN TO INTERPRETIVE CODE 022180,000075: 13,2110 77745 DLOAD # SET D(MPAC)=TIG IN CSEC B28 022181,000076: 13,2111 03413 TIG 022182,000077: 13,2112 34041 STCALL TDEC1 # SET TDEC1=TIG FOR ORBITAL INTEGRATION 022183,000078: 13,2113 27105 OTHPREC 022184,000079: 13,2114 53575 COMPMAT VLOAD UNIT 022185,000080: 13,2115 00001 RATT 022186,000081: # Page 512 022187,000082: 13,2116 77676 VCOMP # U(-R) 022188,000083: 13,2117 00031 STORE 24D # U(-R) TO 24D 022189,000084: 13,2120 53435 VXV UNIT # U(-R) X V = U(V X R) 022190,000085: 13,2121 00007 VATT 022191,000086: 13,2122 00023 STORE 18D 022192,000087: 13,2123 53435 VXV UNIT # U(V X R) X U(-R) = U((R X V) X R) 022193,000088: 13,2124 00031 24D 022194,000089: 13,2125 24015 STOVL 12D 022195,000090: 13,2126 03540 DELVOV 022196,000091: 13,2127 76505 VXM VSL1 # V(MPAC)=DELTA V IN REFCOSYS 022197,000092: 13,2130 00015 12D 022198,000093: 13,2131 77655 VAD 022199,000094: 13,2132 00007 VATT 022200,000095: 13,2133 00007 STORE 6 # V(PD6)=VATT + DELTA V 022201,000096: 13,2134 77624 CALL # PREVENT WOULD-BE USER OF ORBITAL 022202,000097: 13,2135 27442 INTSTALL # INTEG FROM INTERFERING WITH UPDATING 022203,000098: 13,2136 77624 CALL 022204,000099: 13,2137 26222 P76SUB1 022205,000100: 13,2140 53775 VLOAD VSR* 022206,000101: 13,2141 00007 6 022207,000102: 13,2142 57176 0,2 022208,000103: 13,2143 25543 STOVL VCV 022209,000104: 13,2144 00001 RATT 022210,000105: 13,2145 77657 VSR* 022211,000106: 13,2146 57176 0,2 022212,000107: 13,2147 15535 STODL RCV 022213,000108: 13,2150 03413 TIG 022214,000109: 13,2151 01517 STORE TET 022215,000110: 13,2152 71214 CLEAR DLOAD 022216,000111: 13,2153 01673 INTYPFLG 022217,000112: 13,2154 01571 TETTHIS 022218,000113: 13,2155 34041 INTOTHIS STCALL TDEC1 022219,000114: 13,2156 27135 INTEGRVS 022220,000115: 13,2157 77624 CALL 022221,000116: 13,2160 27442 INTSTALL 022222,000117: 13,2161 77624 CALL 022223,000118: 13,2162 26222 P76SUB1 # SET/CLEAR MOONFLAG 022224,000119: 13,2163 77775 VLOAD 022225,000120: 13,2164 00017 RATT1 022226,000121: 13,2165 01503 STORE RRECT 022227,000122: 13,2166 15535 STODL RCV 022228,000123: 13,2167 00015 TAT 022229,000124: 13,2170 25517 STOVL TET 022230,000125: 13,2171 00025 VATT1 022231,000126: 13,2172 77624 CALL 022232,000127: 13,2173 23435 MINIRECT 022233,000128: 13,2174 77776 EXIT 022234,000129: 13,2175 05412 TC PHASCHNG 022235,000130: 13,2176 04024 OCT 04024 022236,000131: # Page 513 022237,000132: 13,2177 05546 TC UPFLAG 022238,000133: 13,2200 00236 ADRES REINTFLG 022239,000134: 022240,000135: 13,2201 06006 TC INTPRET 022241,000136: 13,2202 77624 CALL 022242,000137: 13,2203 26760 ATOPOTH 022243,000138: 13,2204 77531 SSP EXIT 022244,000139: 13,2205 00053 QPRET 022245,000140: 13,2206 26211 OUT 022246,000141: 13,2207 04662 TC BANKCALL # PERMIT USE OF ORBITAL INTEGRATION 022247,000142: 13,2210 27477 CADR INTWAKE1 022248,000143: 13,2211 77776 OUT EXIT 022249,000144: 13,2212 35021 ENDP76 CAF ZERO 022250,000145: 13,2213 55126 TS MARKCTR # CLEAR RR TRACKING MARK COUNTER 022251,000146: 13,2214 55125 TS VHFCNT 022252,000147: 022253,000148: 13,2215 37716 CAF NEGONE 022254,000149: 13,2216 55734 TS MRKBUF2 # INVALIDATE MARK BUFFER 022255,000150: 022256,000151: 13,2217 14106 TCF GOTOP00H 022257,000152: 022258,000153: 13,2220 01524 V06N84 NV 0684 022259,000154: 13,2221 01441 NV 0633 022260,000155: 13,2222 67214 P76SUB1 CLEAR SLOAD 022261,000156: 13,2223 00263 MOONFLAG 022262,000157: 13,2224 00050 X2 022263,000158: 13,2225 43030 BHIZ SET # X2=0...CLEAR MOONFLAG 022264,000159: 13,2226 26230 +2 # =2.....SET MOONFLAG 022265,000160: 13,2227 00063 MOONFLAG 022266,000161: 13,2230 77616 RVQ 022267,000162: End of include-file P76.agc. Parent file is MAIN.agc