Source Code

021606,000001: # Copyright: Public domain. 021607,000002: # Filename: P76.agc 021608,000003: # Purpose: Part of the source code for Colossus, build 249. 021609,000004: # It is part of the source code for the Command Module's (CM) 021610,000005: # Apollo Guidance Computer (AGC), possibly for Apollo 8 and 9. 021611,000006: # Assembler: yaYUL 021612,000007: # Reference: pp. 504-506 of 1701.pdf. 021613,000008: # Contact: Ron Burkey <info@sandroid.org>. 021614,000009: # Website: www.ibiblio.org/apollo. 021615,000010: # Mod history: 08/12/04 RSB. Adapted from corresponding Luminary131 021616,000011: # file. 021617,000012: 021618,000013: # The contents of the "Colossus249" files, in general, are transcribed 021619,000014: # from a scanned document obtained from MIT's website, 021620,000015: # http://hrst.mit.edu/hrs/apollo/public/archive/1701.pdf. Notations on this 021621,000016: # document read, in part: 021622,000017: 021623,000018: # Assemble revision 249 of AGC program Colossus by NASA 021624,000019: # 2021111-041. October 28, 1968. 021625,000020: 021626,000021: # This AGC program shall also be referred to as 021627,000022: # Colossus 1A 021628,000023: 021629,000024: # Prepared by 021630,000025: # Massachusetts Institute of Technology 021631,000026: # 75 Cambridge Parkway 021632,000027: # Cambridge, Massachusetts 021633,000028: # under NASA contract NAS 9-4065. 021634,000029: 021635,000030: # Refer directly to the online document mentioned above for further information. 021636,000031: # Please report any errors (relative to 1701.pdf) to info@sandroid.org. 021637,000032: 021638,000033: # In some cases, where the source code for Luminary 131 overlaps that of 021639,000034: # Colossus 249, this code is instead copied from the corresponding Luminary 131 021640,000035: # source file, and then is proofed to incorporate any changes. 021641,000036: 021642,000037: # Page 504 021643,000038: # 1) PROGRAM NAME -- TARGET DELTA V PROGRAM (P76). 021644,000039: # 2) FUNCTIONAL DESCRIPTION -- UPON ENTRY BY ASTRONAUT ACTION, P76 FLASHES DSKY REQUESTS TO THE ASTRONAUT 021645,000040: # TO PROVIDE VIA DSKY (1) THE DELTA V TO BE APPLIED TO THE OTHER VEHICLE STATE VECTOR AND (2) THE 021646,000041: # TIME (TIG) AT WHICH THE OTHER VEHICLE VELOCITY WAS CHANGED BY EXECUTION OF A THRUSTING MANEUVER. THE 021647,000042: # OTHER VEHICLE STATE VECTOR IS INTEGRATED TO TIG AND UPDATED BY THE ADDITION OF DELTA V (DELTA V HAVING 021648,000043: # BEEN TRANSFORMED FROM LV TO REF COSYS). USING INTEGRVS, THE PROGRAM THEN INTEGRATES THE OTHER 021649,000044: # VEHICLE STATE VECTOR TO THE STATE VECTOR OF THIS VEHICLE, THUS INSURING THAT THE W-MATRIX AND BOTH VEHICLE 021650,000045: # STATES CORRESPOND TO THE SAME TIME. 021651,000046: # 3) ERASABLE INIITIALIZATION REQUIRED -- NONE. 021652,000047: # 4) CALLING SEQUENCES AND EXIT MODES -- CALLED BY ASTRONAUT REQUEST THRU DSKY V 37 E 76E. 021653,000048: # EXITS BY TCF ENDOFJOB. 021654,000049: # 5) OUTPUT -- OTHER VEHICLE STATE VECTOR INTEGRATED TO TIG AND INCREMENTED BY DELTA V IN REF COSYS. 021655,000050: # THE PUSHLIST CONTAINS THE MATRIX BY WHICH THE INPUT DELTA V MUST BE POST-MULTIPLIED TO CONVERT FROM LV 021656,000051: # TO REF COSYS. 021657,000052: # 6) DEBRIS -- OTHER VEHICLE STATE VECTOR. 021658,000053: # 7) SUBROUTINES CALLED -- BANKCALL, GOXDSPF, CSMPREC (OR LEMPREC), ATOPCSM (OR ATOPLEM), INTSTALL, INTWAKE, PHASCHNG 021659,000054: # INTPRET, INTEGRVS, AND MINIRECT. 021660,000055: # 8) FLAG USE -- MOONFLAG, CMOONFLG, INTYPFLG, RASFLAG, AND MARKCT. 021661,000056: 021662,000057: 30,2000 BANK 30 021663,000058: 13,2000 SETLOC P76LOC 021664,000059: 13,2000 BANK 021665,000060: 021666,000061: 13,2036 COUNT* $$/P76 021667,000062: 021668,000063: 13,2036 E7,1412 EBANK= TIG 021669,000064: 021670,000065: 13,2036 05435 P76 TC UPFLAG 021671,000066: 13,2037 00031 ADRES TRACKFLG 021672,000067: 021673,000068: 13,2040 32163 CAF V06N84 # FLASH LAST DELTA V 021674,000069: 13,2041 04555 TC BANKCALL # AND WAIT FOR KEYBOARD ACTION. 021675,000070: 13,2042 20624 CADR GOFLASH 021676,000071: 13,2043 12155 TCF ENDP76 021677,000072: 13,2044 02046 TC +2 # PROCEED 021678,000073: 13,2045 02040 TC -5 # STORE DATA AND REPEAT FLASHING 021679,000074: 13,2046 32164 CAF V06N84 +1 # FLASH VERB 06 NOUN 33, DISPLAY LAST TIG, 021680,000075: 13,2047 04555 TC BANKCALL # AND WAIT FOR KEYBOARD ACTION. 021681,000076: 13,2050 20624 CADR GOFLASH 021682,000077: 13,2051 12155 TCF ENDP76 021683,000078: 13,2052 02054 TC +2 021684,000079: 13,2053 02046 TC -5 021685,000080: 13,2054 06006 TC INTPRET # RETURN TO INTERPRETIVE CODE 021686,000081: 13,2055 77745 DLOAD # SET D(MPAC)=TIG IN CSEC B28 021687,000082: 13,2056 03413 TIG 021688,000083: 13,2057 34041 STCALL TDEC1 # SET TDEC1=TIG FOR ORBITAL INTEGRATION 021689,000084: 13,2060 27036 OTHPREC 021690,000085: 13,2061 53575 COMPMAT VLOAD UNIT 021691,000086: 13,2062 00001 RATT 021692,000087: # Page 505 021693,000088: 13,2063 77676 VCOMP # U(-R) 021694,000089: 13,2064 00031 STORE 24D # U(-R) TO 24D 021695,000090: 13,2065 53435 VXV UNIT # U(-R) X V = U(V X R) 021696,000091: 13,2066 00007 VATT 021697,000092: 13,2067 00023 STORE 18D 021698,000093: 13,2070 53435 VXV UNIT # U(V X R) X U(-R) = U((R X V) X R) 021699,000094: 13,2071 00031 24D 021700,000095: 13,2072 24015 STOVL 12D 021701,000096: 13,2073 03540 DELVOV 021702,000097: 13,2074 76505 VXM VSL1 # V(MPAC)=DELTA V IN REFCOSYS 021703,000098: 13,2075 00015 12D 021704,000099: 13,2076 77655 VAD 021705,000100: 13,2077 00007 VATT 021706,000101: 13,2100 00007 STORE 6 # V(PD6)=VATT + DELTA V 021707,000102: 13,2101 77624 CALL # PRESENT WOULD-BE USER OF ORBITAL 021708,000103: 13,2102 27371 INTSTALL # INTEG FROM INTERFERING WITH UPDATING 021709,000104: 13,2103 77624 CALL 021710,000105: 13,2104 26165 P76SUB1 021711,000106: 13,2105 53775 VLOAD VSR* 021712,000107: 13,2106 00007 6 021713,000108: 13,2107 57176 0,2 021714,000109: 13,2110 25543 STOVL VCV 021715,000110: 13,2111 00001 RATT 021716,000111: 13,2112 77657 VSR* 021717,000112: 13,2113 57176 0,2 021718,000113: 13,2114 15535 STODL RCV 021719,000114: 13,2115 03413 TIG 021720,000115: 13,2116 01517 STORE TET 021721,000116: 13,2117 71214 CLEAR DLOAD 021722,000117: 13,2120 01673 INTYPFLG 021723,000118: 13,2121 01571 TETTHIS 021724,000119: 13,2122 34041 INTOTHIS STCALL TDEC1 021725,000120: 13,2123 27066 INTEGRVS 021726,000121: 13,2124 77624 CALL 021727,000122: 13,2125 27371 INTSTALL 021728,000123: 13,2126 77775 VLOAD 021729,000124: 13,2127 00017 RATT1 021730,000125: 13,2130 01503 STORE RRECT 021731,000126: 13,2131 15535 STODL RCV 021732,000127: 13,2132 00015 TAT 021733,000128: 13,2133 25517 STOVL TET 021734,000129: 13,2134 00025 VATT1 021735,000130: 13,2135 77624 CALL 021736,000131: 13,2136 23360 MINIRECT 021737,000132: 13,2137 77776 EXIT 021738,000133: 13,2140 05301 TC PHASCHNG 021739,000134: 13,2141 04024 OCT 04024 021740,000135: 021741,000136: 13,2142 05435 TC UPFLAG 021742,000137: 13,2143 00236 ADRES REINTFLG 021743,000138: # Page 506 021744,000139: 021745,000140: 13,2144 06006 TC INTPRET 021746,000141: 13,2145 77624 CALL 021747,000142: 13,2146 26711 ATOPOTH 021748,000143: 13,2147 77531 SSP EXIT 021749,000144: 13,2150 00053 QPRET 021750,000145: 13,2151 26154 OUT 021751,000146: 13,2152 04555 TC BANKCALL # PERMIT USE OF ORBITAL INTEGRATION 021752,000147: 13,2153 27426 CADR INTWAKE1 021753,000148: 13,2154 77776 OUT EXIT 021754,000149: 13,2155 34714 ENDP76 CAF ZERO 021755,000150: 13,2156 55126 TS MARKCTR # CLEAR RR TRACKING MARK COUNTER 021756,000151: 13,2157 55125 TS VHFCNT 021757,000152: 021758,000153: 13,2160 37716 CAF NEGONE 021759,000154: 13,2161 55734 TS MRKBUF2 # INVALIDATE MARK BUFFER 021760,000155: 021761,000156: 13,2162 14106 TCF GOTOP00H 021762,000157: 021763,000158: 13,2163 01524 V06N84 NV 0684 021764,000159: 13,2164 01441 NV 0633 021765,000160: 13,2165 43174 P76SUB1 AXT,2 SET 021766,000161: 13,2166 00002 2 021767,000162: 13,2167 00063 MOONFLAG # SET MEANS MOON IS SPHERE OF INFLUENCE. 021768,000163: 13,2170 77014 BON AXT,2 021769,000164: 13,2171 04303 CMOONFLG # SET MEANS PERM CM STATE IN LUNAR SPHERE. 021770,000165: 13,2172 00052 QPRET 021771,000166: 13,2173 00000 0 021772,000167: 13,2174 43414 CLEAR RVQ 021773,000168: 13,2175 00263 MOONFLAG 021774,000169: 021775,000170: 021776,000171: 021777,000172: 021778,000173: End of include-file P76.agc. Parent file is MAIN.agc