Source Code
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These source-code files derive from a printout of Luminary 116 (the Apollo 12
Lunar Module guidance computer program), from the personal library of
original AGC developer Don Eyles, digitally photographed at archive.org,
financially sponsored by Ron Burkey, and transcribed to source code by a
team of volunteers. This colorized, syntax-highlighted form was created
by assembling that transcribed source code. Note that the full page images
are available on the
Virtual AGC project page at archive.org, while reduced-size images
are presented at the VirtualAGC project website. Report or fix any
transcription errors at
the Virtual AGC project code repository. Notations on the program listing read, in part: GAP: ASSEMBLE REVISION 116 OF AGC PROGRAM LUMINARY BY NASA 2021112-071 19:09 AUG. 11,1969Note that the date is the date of the printout, not the date of the program revision. |
059193,000002: ## Copyright: Public domain.
059194,000003: ## Filename: T6-RUPT_PROGRAMS.agc
059195,000004: ## Purpose: A section of Luminary revision 116.
059196,000005: ## It is part of the source code for the Lunar Module's (LM)
059197,000006: ## Apollo Guidance Computer (AGC) for Apollo 12.
059198,000007: ## This file is intended to be a faithful transcription, except
059199,000008: ## that the code format has been changed to conform to the
059200,000009: ## requirements of the yaYUL assembler rather than the
059201,000010: ## original YUL assembler.
059202,000011: ## Reference: pp. 1393-1395
059203,000012: ## Assembler: yaYUL
059204,000013: ## Contact: Ron Burkey <info@sandroid.org>.
059205,000014: ## Website: www.ibiblio.org/apollo/index.html
059206,000015: ## Mod history: 2017-01-22 MAS Created from Luminary 99.
059207,000016: ## 2017-02-07 NV Updated for Luminary 116.
059208,000017: ## 2017-03-14 RSB Proofed comment text via 3-way diff vs
059209,000018: ## Luminary 99 and 131 ... no problems found.
059210,000019: ## 2017-08-29 MAS Fixed a comment-text error found while transcribing
059211,000020: ## Zerlina 56.
059212,000021:
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Page 1393 |
059214,000023: # PROGRAM NAMES: (1) T6JOBCHK MOD. NO. 5 OCTOBER 2, 1967
059215,000024: # (2) DOT6RUPT
059216,000025: # MODIFICATION BY: LOWELL G HULL (A.C.ELECTRONICS)
059217,000026:
059218,000027: # THESE PROGRAMS ENABLE THE LM DAP TO CONTROL THE THRUST TIMES OF THE REACTION CONTROL SYSTEM JETS BY USING TIME6.
059219,000028: # SINCE THE LM DAP MAINTAINS EXCLUSIVE CONTROL OVER TIME6 AND ITS INTERRUPTS, THE FOLLOWING CONVENTIONS HAVE BEEN
059220,000029: # ESTABLISHED AND MUST NOT BE TAMPERED WITH:
059221,000030: # 1. NO NUMBER IS EVER PLACED INTO TIME6 EXCEPT BY LM DAP.
059222,000031: # 2. NO PROGRAM OTHER THAN LM DAP ENABLES THE TIME6 COUNTER.
059223,000032: # 3. TO USE TIME6, THE FOLLOWING SEQUENCE IS ALWAYS EMPLOYED:
059224,000033: # A. A POSITIVE (NON-ZERO) NUMBER IS STORED IN TIME6.
059225,000034: # B. THE TIME6 CLOCK IS ENABLED.
059226,000035: # C. TIME6 IS INTERROGATED AND IS:
059227,000036: # I. NEVER FOUND NEGATIVE (NON-ZERO) OR +0.
059228,000037: # II. SOMETIMES FOUND POSITIVE (BETWEEN 1 AND 240D) INDICATING THAT IT IS ACTIVE.
059229,000038: # III. SOMETIMES FOUND POSMAX INDICATING THAT IT IS INACTIVE AND NOT ENABLED.
059230,000039: # IV. SOMETIMES FOUND NEGATIVE ZERO INDICATING THAT:
059231,000040: # A. A T6RUPT IS ABOUT TO OCCUR AT THE NEXT DINC, OR
059232,000041: # B. A T6RUPT IS WAITING IN THE PRIORITY CHAIN, OR
059233,000042: # C. A T6RUPT IS IN PROCESS NOW.
059234,000043: # 4) ALL PROGRAMS WHICH OPERATE IN EITHER INTERRUPT MODE OR WITH INTERRUPT INHIBITED MUST CALL T6JOBCHK
059235,000044: # EVERY 5 MILLISECONDS TO PROCESS A POSSIBLE WAITING T6RUPT BEFORE IT CAN BE HONORED BY THE HARDWARE.
059236,000045: # (5. PROGRAM JTLST, IN Q,R-AXES, HANDLES THE INPUT LIST.)
059237,000046:
059238,000047: # T6JOBCHK CALLING SEQUENCE:
059239,000048: # L TC T6JOBCHK
059240,000049: # L+1 (RETURN)
059241,000050:
059242,000051: # DOT6RUPT CALLING SEQUENCE:
059243,000052: # DXCH ARUPT T6RUPT LEAD IN AT LOCATION 4004.
059244,000053: # EXTEND
059245,000054: # DCA T6ADR
059246,000055: # DTCB
059247,000056:
059248,000057: # SUBROUTINES CALLED: DOT6RUPT CALLS T6JOBCHK.
059249,000058:
059250,000059: # NORMAL EXIT MODES: T6JOBCHK RETURNS TO L +1.
059251,000060: # DOT6RUPT TRANSFERS CONTROL TO RESUME.
059252,000061:
059253,000062: # ALARM/ABORT MODES: NONE.
059254,000063:
059255,000064: # INPUT: TIME6 NXT6ADR OUTPUT: TIME6 NXT6ADR CHANNEL 5
059256,000065: # T6NEXT T6NEXT +1 T6NEXT T6NEXT +1 CHANNEL 6
059257,000066: # T6FURTHA T6FURTHA +1 T6FURTHA T6FURTHA +1 BIT15/CH13
059258,000067:
059259,000068: # DEBRIS: T6JOBCHK CLOBBERS A. DOT6RUPT CLOBBERS NOTHING.
059260,000069:
059261,000070: 5743 BLOCK 02
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Page 1394 |
059263,000072: 17,2055 BANK 17
059264,000073: 17,2000 SETLOC DAPS2
059265,000074: 17,2000 BANK
059266,000075: 17,2055 E6,1466 EBANK= T6NEXT
059267,000076: 17,2055 COUNT* $$/DAPT6
059268,000077:
059269,000078: 17,2055 10031 T6JOBCHK CCS TIME6 # CHECK TIME6 FOR WAITING T6RUPT:
059270,000079: 17,2056 00002 TC Q # NONE: CLOCK COUTING DOWN.
059271,000080: 17,2057 05675 TC CCSHOLE
059272,000081: 17,2060 05675 TC CCSHOLE
059273,000082:
059274,000083: # CONTROL PASSES TO T6JOB ONLY WHEN C(TIME6) = -0 (I.E. WHEN A T6RUPT MUST BE PROCESSED).
059275,000084:
059276,000085: 17,2061 34733 T6JOB CA POSMAX
059277,000086: 17,2062 22007 ZL
059278,000087: 17,2063 53471 DXCH T6FURTHA
059279,000088: 17,2064 53467 DXCH T6NEXT
059280,000089: 17,2065 23465 LXCH NXT6ADR
059281,000090: 17,2066 54031 TS TIME6
059282,000091:
059283,000092: 17,2067 67730 AD PRIO37
059284,000093: 17,2070 54000 TS A
059285,000094: 17,2071 12075 TCF ENABLET6
059286,000095: 17,2072 34733 CA POSMAX
059287,000096: 17,2073 54031 TS TIME6
059288,000097: 17,2074 12115 TCF GOCH56
059289,000098: 17,2075 00006 ENABLET6 EXTEND
059290,000099: 17,2076 23265 QXCH C13QSAV
059291,000100: 17,2077 22070 LXCH RUPTREG1
059292,000101: 17,2100 06022 TC C13STALL
059293,000102: 17,2101 00006 EXTEND
059294,000103: 17,2102 23265 QXCH C13QSAV
059295,000104: 17,2103 22070 LXCH RUPTREG1
059296,000105: 17,2104 34735 CAF BIT15
059297,000106: 17,2105 00006 EXTEND
059298,000107: 17,2106 05013 WOR CHAN13
059299,000108: 17,2107 31466 CA T6NEXT
059300,000109: 17,2110 67730 AD PRIO37
059301,000110: 17,2111 54000 TS A
059302,000111: 17,2112 12115 TCF GOCH56
059303,000112: 17,2113 34733 CA POSMAX
059304,000113: 17,2114 55466 TS T6NEXT
059305,000114: 17,2115 50001 GOCH56 INDEX L
059306,000115: 17,2116 15743 TCF WRITEP -1
059307,000116:
059308,000117: 5743 BLOCK 02
059309,000118: 4000 SETLOC FFTAG9
059310,000119: 4000 BANK
059311,000120: 5743 E6,1635 EBANK= CDUXD
059312,000121: 5743 COUNT* $$/DAPT6
059313,000122:
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Page 1395 |
059315,000124: 5743 31472 CA NEXTP
059316,000125: 5744 00006 WRITEP EXTEND
059317,000126: 5745 01006 WRITE CHAN6
059318,000127: 5746 00002 TC Q
059319,000128:
059320,000129: 5747 31473 CA NEXTU
059321,000130: 5750 54001 WRITEU TS L
059322,000131: 5751 45764 CS 00314OCT
059323,000132: 5752 00006 EXTEND
059324,000133: 5753 02005 RAND CHAN5
059325,000134: 5754 60001 AD L
059326,000135: 5755 00006 EXTEND
059327,000136: 5756 01005 WRITE CHAN5
059328,000137: 5757 00002 TC Q
059329,000138:
059330,000139: 5760 31474 CA NEXTV
059331,000140: 5761 54001 WRITEV TS L
059332,000141: 5762 35764 CA 00314OCT
059333,000142: 5763 15752 TCF -9D
059334,000143: 5764 00314 00314OCT OCT 00314
059335,000144:
059336,000145: 17,2117 BANK 17
059337,000146: 17,2000 SETLOC DAPS2
059338,000147: 17,2000 BANK
059339,000148:
059340,000149: 17,2117 E6,1466 EBANK= T6NEXT
059341,000150: 17,2117 COUNT* $$/DAPT6
059342,000151:
059343,000152: 17,2117 22016 DOT6RUPT LXCH BANKRUPT # (INTERRUPT LEAD INS CONTINUED)
059344,000153: 17,2120 00006 EXTEND
059345,000154: 17,2121 22012 QXCH QRUPT
059346,000155:
059347,000156: 17,2122 02055 TC T6JOBCHK # CALL T6JOBCHK.
059348,000157:
059349,000158: 17,2123 15270 TCF RESUME # END TIME6 INTERRUPT PROCESSOR.
059350,000159:
End of include-file T6-RUPT_PROGRAMS.agc. Parent file is MAIN.agc