Source Code
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These source-code files were transcribed from a printout in Don Eyles's personal
collection, scanned by archive.org, and financially sponsored by Linden Sims.
A team of volunteers performed the transcription and proof-reading. The scanned
page images are available at
the Virtual AGC Project website, as well as higher-quality (but much larger)
images at
the Virtual AGC Project's collection in the Internet Archive. Report any problems by creating
"issues" at
the Virtual AGC Project's GitHub Repository. Notations on the program listing read, in part: GAP: ASSEMBLE REVISION 56 OF AGC PROGRAM ZERLINA BY ZOROASTER 9:12 OCT. 21,1970Note that the date is the date of the printout, not the date of the program revision. |
014540,000002: ## Copyright: Public domain.
014541,000003: ## Filename: LEM_GEOMETRY.agc
014542,000004: ## Purpose: A log section of Zerlina 56, the final revision of
014543,000005: ## Don Eyles's offline development program for the variable
014544,000006: ## guidance period servicer. It also includes a new P66 with LPD
014545,000007: ## (Landing Point Designator) capability, based on an idea of John
014546,000008: ## Young's. Neither of these advanced features were actually flown,
014547,000009: ## but Zerlina was also the birthplace of other big improvements to
014548,000010: ## Luminary including the terrain model and new (Luminary 1E)
014549,000011: ## analog display programs. Zerlina was branched off of Luminary 145,
014550,000012: ## and revision 56 includes all changes up to and including Luminary
014551,000013: ## 183. It is therefore quite close to the Apollo 14 program,
014552,000014: ## Luminary 178, where not modified with new features.
014553,000015: ## Reference: pp. 325-330
014554,000016: ## Assembler: yaYUL
014555,000017: ## Contact: Ron Burkey <info@sandroid.org>.
014556,000018: ## Website: www.ibiblio.org/apollo/index.html
014557,000019: ## Mod history: 2017-07-28 MAS Created from Luminary 210.
014558,000020: ## 2017-08-21 RSB Transcribed.
014559,000021:
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Page 332 |
014561,000023: 23,2041 BANK 23
014562,000024: 13,2000 SETLOC LEMGEOM
014563,000025: 13,2000 BANK
014564,000026:
014565,000027: 13,2070 30,2000 SBANK= LOWSUPER
014566,000028: 13,2070 E5,1642 EBANK= XSM
014567,000029:
014568,000030: # THESE TWO ROUTINES COMPUTE THE ACTUAL STATE VECTOR FOR LM,CSM BY ADDING
014569,000031: # THE CONIC R,V AND THE DEVIATIONSR,V. THE STATE VECTORS ARE CONVERTED TO
014570,000032: # METERS B-29 AND METERS/CSEC B-7 AND STORED APPROPRIATELY IN RN,VN OR
014571,000033: # R-OTHER , V-OTHER FOR DOWNLINK. THE ROUTINES NAMES ARE SWITCHED IN THE
014572,000034: # OTHER VEHICLES COMPUTER.
014573,000035:
014574,000036: # INPUT
014575,000037: # STATE VECTOR IN TEMPORARY STORAGE AREA
014576,000038: # IF STATE VECTOR IS SCALED POS B27 AND VEL B5
014577,000039: # SET X2 TO +2
014578,000040: # IF STATE VECTOR IS SCALED POS B29 AND VEL B7
014579,000041: # SET X2 TO 0
014580,000042:
014581,000043: # OUTPUT
014582,000044: # R(T) IN RN, V(T) IN VN, T IN PIPTIME
014583,000045: # OR
014584,000046: # R(T) IN R-OTHER, V(T) IN V-OTHER (T IS DEFINED BY T-OTHER)
014585,000047:
014586,000048: 13,2070 COUNT* $$/GEOM
014587,000049: 13,2070 43414 SVDWN2 BOF RVQ # SW=1=AVETOMID DOING W-MATRIX INTEG.
014588,000050: 13,2071 04756 AVEMIDSW
014589,000051: 13,2072 26073 +1
014590,000052: 13,2073 53775 VLOAD VSL*
014591,000053: 13,2074 01521 TDELTAV
014592,000054: 13,2075 57605 0 -7,2
014593,000055: 13,2076 53655 VAD VSL*
014594,000056: 13,2077 01535 RCV
014595,000057: 13,2100 57576 0,2
014596,000058: 13,2101 25220 STOVL RN
014597,000059: 13,2102 01527 TNUV
014598,000060: 13,2103 53257 VSL* VAD
014599,000061: 13,2104 57602 0 -4,2
014600,000062: 13,2105 01543 VCV
014601,000063: 13,2106 77657 VSL*
014602,000064: 13,2107 57576 0,2
014603,000065: 13,2110 15226 STODL VN
014604,000066: 13,2111 01517 TET
014605,000067: 13,2112 01234 STORE PIPTIME
014606,000068: 13,2113 77616 RVQ
014607,000069:
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Page 326 |
014609,000071: 13,2114 53775 SVDWN1 VLOAD VSL*
014610,000072: 13,2115 01521 TDELTAV
014611,000073: 13,2116 57605 0 -7,2
014612,000074: 13,2117 53655 VAD VSL*
014613,000075: 13,2120 01535 RCV
014614,000076: 13,2121 57576 0,2
014615,000077: 13,2122 25716 STOVL R-OTHER
014616,000078: 13,2123 01527 TNUV
014617,000079: 13,2124 53257 VSL* VAD
014618,000080: 13,2125 57602 0 -4,2
014619,000081: 13,2126 01543 VCV
014620,000082: 13,2127 77657 VSL*
014621,000083: 13,2130 57576 0,2
014622,000084: 13,2131 01724 STORE V-OTHER
014623,000085: 13,2132 77616 RVQ
014624,000086:
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Page 327 |
014626,000088: # THE FOLLOWING ROUTINE TAKES A HALF UNIT TARGET VECTOR REFERRED TO NAV BASE COORDINATES AND FINDS BOTH
014627,000089: # GIMBAL ORIENTATIONS AT WHICH THE RR MIGHT SIGHT THE TARGET. THE GIMBAL ANGLES CORRESPONDING TO THE PRESENT MODE
014628,000090: # ARE LEFT IN MODEA AND THOSE WHICH WOULD BE USED AFTER A REMODE IN MODEB. THIS ROUTINE ASSUMES MODE 1 IS TRUNNION
014629,000091: # ANGLE LESS THAN 90 DEGS IN ABS VALUE WITH ARBITRARY SHAFT, WITH A CORRESPONDING DEFINITION FOR MODE 2. MODE
014630,000092: # SELECTION AND LIMIT CHECKING ARE DONE ELSEWHERE.
014631,000093:
014632,000094: # THE MODE 1 CONFIGURATION IS CALCULATED FROM THE VECTOR AND THEN MODE 2 IS FOUND USING THE RELATIONS
014633,000095:
014634,000096: # S(2) = 180 + S(1)
014635,000097: # T(2) = 180 - T(1)
014636,000098:
014637,000099: # THE VECTOR ARRIVES IN MPAC WHERE TRG*SMNG OR *SMNB* WILL HAVE LEFT IT.
014638,000100:
014639,000101: 13,2133 00041 RRANGLES STORE 32D
014640,000102: 13,2134 57545 DLOAD DCOMP # SINCE WE WILL FIND THE MODE 1 SHAFT
014641,000103: 13,2135 00043 34D # ANGLE LATER, WE CAN FIND THE MODE 1
014642,000104: 13,2136 67401 SETPD ASIN # TRUNNION BY SIMPLY TAKING THE ARCSIN OF
014643,000105: 13,2137 00001 0 # THE Y COMPONENT, THE ASIN GIVING AN
014644,000106: 13,2140 44206 PUSH BDSU # ANSWER WHOSE ABS VAL IS LESS THAN 90 DEG
014645,000107: 13,2141 24005 LODPHALF
014646,000108: 13,2142 14005 STODL 4 # MODE 2 TRUNNION TO 4.
014647,000109:
014648,000110: 13,2143 24007 LO6ZEROS
014649,000111: 13,2144 24043 STOVL 34D # UNIT THE PROJECTION OF THE VECTOR
014650,000112: 13,2145 00041 32D # IN THE X-Z PLANE
014651,000113: 13,2146 41056 UNIT BOVB # IF OVERFLOW,TARGET VECTOR IS ALONG Y
014652,000114: 13,2147 52412 LUNDESCH # CALL FOR MANEUVER UNLESS ON LUNAR SURF
014653,000115: 13,2150 14041 STODL 32D # PROJECTION VECTOR.
014654,000116: 13,2151 00041 32D
014655,000117: 13,2152 44142 SR1 STQ
014656,000118: 13,2153 00051 S2
014657,000119: 13,2154 14023 STODL SINTH # USE ARCTRIG SINCE SHAFT COULD BE ARB.
014658,000120: 13,2155 00045 36D
014659,000121: 13,2156 77742 SR1
014660,000122: 13,2157 34021 STCALL COSTH
014661,000123: 13,2160 47316 ARCTRIG
014662,000124:
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Page 328 |
014664,000126: 13,2161 43206 PUSH DAD # MODE 1 SHAFT TO 2.
014665,000127: 13,2162 24005 LODPHALF
014666,000128: 13,2163 24007 STOVL 6
014667,000129: 13,2164 00005 4
014668,000130: 13,2165 77634 RTB # FIND MODE 2 CDU ANGLES.
014669,000131: 13,2166 21617 2V1STO2S
014670,000132: 13,2167 25111 STOVL MODEB
014671,000133: 13,2170 00001 0
014672,000134: 13,2171 77634 RTB # MODE 1 ANGLES TO MODE A.
014673,000135: 13,2172 21617 2V1STO2S
014674,000136: 13,2173 01107 STORE MODEA
014675,000137: 13,2174 77776 EXIT
014676,000138:
014677,000139: 13,2175 40110 CS RADMODES # SWAP MODEA AND MODEB IF RR IN MODE 2.
014678,000140: 13,2176 74740 MASK ANTENBIT
014679,000141: 13,2177 10000 CCS A
014680,000142: 13,2200 12204 TCF +4
014681,000143:
014682,000144: 13,2201 53107 DXCH MODEA
014683,000145: 13,2202 53111 DXCH MODEB
014684,000146: 13,2203 53107 DXCH MODEA
014685,000147:
014686,000148: 13,2204 06051 TC INTPRET
014687,000149: 13,2205 77650 GOTO
014688,000150: 13,2206 00051 S2
014689,000151:
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Page 329 |
014691,000153: # GIVEN RR TRUNNION AND SHAFT (T,S) IN TANGNB,+1,FIND THE ASSOCIATED
014692,000154: # LINE OF SIGHT IN NAV BASE AXES. THE HALF UNIT VECTOR, .5(SIN(S)COS(T),
014693,000155: # -SIN(T),COS(S)COS(T)) IS LEFT IN MPAC AND 32D.
014694,000156:
014695,000157: 23,2000 SETLOC INFLIGHT
014696,000158: 23,2000 BANK
014697,000159:
014698,000160: 23,2041 COUNT* $$/GEOM
014699,000161:
014700,000162: 23,2041 47135 RRNB SLOAD RTB
014701,000163: 23,2042 03753 TANGNB
014702,000164: 23,2043 21560 CDULOGIC
014703,000165: 23,2044 41401 SETPD PUSH # TRUNNION ANGLE TO 0
014704,000166: 23,2045 00001 0
014705,000167: 23,2046 57556 SIN DCOMP
014706,000168: 23,2047 14043 STODL 34D # Y COMPONENT
014707,000169:
014708,000170: 23,2050 41546 COS PUSH # .5 COS(T) TO 0
014709,000171: 23,2051 47135 SLOAD RTB
014710,000172: 23,2052 03754 TANGNB +1
014711,000173: 23,2053 21560 CDULOGIC
014712,000174: 23,2054 71406 RRNB1 PUSH COS # SHAFT ANGLE TO 2
014713,000175: 23,2055 72405 DMP SL1
014714,000176: 23,2056 00001 0
014715,000177: 23,2057 14045 STODL 36D # Z COMPONENT
014716,000178:
014717,000179: 23,2060 41356 SIN DMP
014718,000180: 23,2061 77752 SL1
014719,000181: 23,2062 24041 STOVL 32D
014720,000182: 23,2063 00041 32D
014721,000183: 23,2064 77616 RVQ
014722,000184:
014723,000185: # THIS ENTRY TO RRNB REQUIRES THE TRUNNION AND SHAFT ANGLES IN MPAC AND MPAC +1 RESPECTIVELY
014724,000186:
014725,000187: 23,2065 14025 RRNBMPAC STODL 20D # SAVE SHAFT CDU IN 21.
014726,000188: 23,2066 00155 MPAC # SET MODE TO DP. (THE PRECEEDING STORE
014727,000189: # MAY BE DP, TP OR VECTOR.)
014728,000190: 23,2067 40234 RTB SETPD
014729,000191: 23,2070 21560 CDULOGIC
014730,000192: 23,2071 00001 0
014731,000193: 23,2072 73406 PUSH SIN # TRUNNION ANGLE TO 0
014732,000194: 23,2073 77676 DCOMP
014733,000195: 23,2074 14043 STODL 34D # Y COMPONENT
014734,000196: 23,2075 41546 COS PUSH # .5COS(T) TO 0
014735,000197: 23,2076 47135 SLOAD RTB # PICK UP CDU'S.
014736,000198: 23,2077 00026 21D
014737,000199: 23,2100 21560 CDULOGIC
014738,000200: 23,2101 77650 GOTO
014739,000201: 23,2102 46054 RRNB1
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Page 330 Note: This page is empty in the printout of the assembly listing. |
End of include-file LEM_GEOMETRY.agc. Parent file is MAIN.agc