Source Code
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This is a reconstructed version of Luminary 130, the initial AGC program released
in November 1969 for the Apollo 13 LM. Three more releases
followed before the flown revision was finally manufactured in February 1970.
This reconstruction was created from a previous transcription of the original listing of
Luminary 131, combined with Luminary memo #129 which describes the small difference
between the Luminary 130 and 131. The reconstructed source code was verified by
matching memory-bank checksums to those listed for Luminary 130 in drawing 2021152G.
In this source code, program comments from the original (Luminary 131) code are
prefixed with '#', while those added later by the Virtual AGC project are prefixed
with '##'.
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059171,000002: ## Copyright: Public domain.
059172,000003: ## Filename: T6-RUPT_PROGRAMS.agc
059173,000004: ## Purpose: A section of the reconstructed source code for Luminary 130.
059174,000005: ## This was the original program released for the Apollo 13 LM,
059175,000006: ## although several more revisions would follow. It has been
059176,000007: ## reconstructed from a listing of Luminary 131, from which it
059177,000008: ## differs on only two lines in P70-P71. The difference is
059178,000009: ## described in detail in Luminary memo #129, which was used
059179,000010: ## to perform the reconstruction. This file is intended to be a
059180,000011: ## faithful reconstruction, except that the code format has been
059181,000012: ## changed to conform to the requirements of the yaYUL assembler
059182,000013: ## rather than the original YUL assembler.
059183,000014: ## Reference: pp. 1395-1397
059184,000015: ## Contact: Ron Burkey <info@sandroid.org>.
059185,000016: ## Website: www.ibiblio.org/apollo/index.html
059186,000017: ## Mod history: 06/07/03 RSB. Began transcribing.
059187,000018: ## 05/14/05 RSB Corrected website reference above.
059188,000019: ## 2017-01-06 RSB Page numbers now agree with those on the
059189,000020: ## original hardcopy, as opposed to the PDF page
059190,000021: ## numbers in 1701.pdf.
059191,000022: ## 2017-02-28 RSB Proofed comment text using octopus/ProoferComments.
059192,000023: ## 2017-08-29 MAS Fixed a comment-text error found while transcribing
059193,000024: ## Zerlina 56.
059194,000025: ## 2018-09-04 MAS Copied from Luminary 131 for Luminary 130.
059195,000026:
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Page 1395
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059197,000028: # PROGRAM NAMES: (1) T6JOBCHK MOD. NO. 5 OCTOBER 2, 1967
059198,000029: # (2) DOT6RUPT
059199,000030: # MODIFICATION BY: LOWELL G HULL (A.C.ELECTRONICS)
059200,000031:
059201,000032: # THESE PROGRAMS ENABLE THE LM DAP TO CONTROL THE THRUST TIMES OF THE REACTION CONTROL SYSTEM JETS BY USING TIME6.
059202,000033: # SINCE THE LM DAP MAINTAINS EXCLUSIVE CONTROL OVER TIME6 AND ITS INTERRUPTS, THE FOLLOWING CONVENTIONS HAVE BEEN
059203,000034: # ESTABLISHED AND MUST NOT BE TAMPERED WITH:
059204,000035: # 1. NO NUMBER IS EVER PLACED INTO TIME6 EXCEPT BY LM DAP.
059205,000036: # 2. NO PROGRAM OTHER THAN LM DAP ENABLES THE TIME6 COUNTER.
059206,000037: # 3. TO USE TIME6, THE FOLLOWING SEQUENCE IS ALWAYS EMPLOYED:
059207,000038: # A. A POSITIVE (NON-ZERO) NUMBER IS STORED IN TIME6.
059208,000039: # B. THE TIME6 CLOCK IS ENABLED.
059209,000040: # C. TIME6 IS INTERROGATED AND IS:
059210,000041: # I. NEVER FOUND NEGATIVE (NON-ZERO) OR +0.
059211,000042: # II. SOMETIMES FOUND POSITIVE (BETWEEN 1 AND 240D) INDICATING THAT IT IS ACTIVE.
059212,000043: # III. SOMETIMES FOUND POSMAX INDICATING THAT IT IS INACTIVE AND NOT ENABLED.
059213,000044: # IV. SOMETIMES FOUND NEGATIVE ZERO INDICATING THAT:
059214,000045: # A. A T6RUPT IS ABOUT TO OCCUR AT THE NEXT DINC, OR
059215,000046: # B. A T6RUPT IS WAITING IN THE PRIORITY CHAIN, OR
059216,000047: # C. A T6RUPT IS IN PROCESS NOW.
059217,000048: # 4) ALL PROGRAMS WHICH OPERATE IN EITHER INTERRUPT MODE OR WITH INTERRUPT INHIBITED MUST CALL T6JOBCHK
059218,000049: # EVERY 5 MILLISECONDS TO PROCESS A POSSIBLE WAITING T6RUPT BEFORE IT CAN BE HONORED BY THE HARDWARE.
059219,000050: # (5. PROGRAM JTLST, IN Q,R-AXES, HANDLES THE INPUT LIST.)
059220,000051:
059221,000052: # T6JOBCHK CALLING SEQUENCE:
059222,000053: # L TC T6JOBCHK
059223,000054: # L+1 (RETURN)
059224,000055:
059225,000056: # DOT6RUPT CALLING SEQUENCE:
059226,000057: # DXCH ARUPT T6RUPT LEAD IN AT LOCATION 4004.
059227,000058: # EXTEND
059228,000059: # DCA T6ADR
059229,000060: # DTCB
059230,000061:
059231,000062: # SUBROUTINES CALLED: DOT6RUPT CALLS T6JOBCHK.
059232,000063:
059233,000064: # NORMAL EXIT MODES: T6JOBCHK RETURNS TO L +1.
059234,000065: # DOT6RUPT TRANSFERS CONTROL TO RESUME.
059235,000066:
059236,000067: # ALARM/ABORT MODES: NONE.
059237,000068:
059238,000069: # INPUT: TIME6 NXT6ADR OUTPUT: TIME6 NXT6ADR CHANNEL 5
059239,000070: # T6NEXT T6NEXT +1 T6NEXT T6NEXT +1 CHANNEL 6
059240,000071: # T6FURTHA T6FURTHA +1 T6FURTHA T6FURTHA +1 BIT15/CH13
059241,000072:
059242,000073: # DEBRIS: T6JOBCHK CLOBBERS A. DOT6RUPT CLOBBERS NOTHING.
059243,000074:
059244,000075: 5743 BLOCK 02
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Page 1396
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059246,000077: 17,2055 BANK 17
059247,000078: 17,2000 SETLOC DAPS2
059248,000079: 17,2000 BANK
059249,000080: 17,2055 E6,1466 EBANK= T6NEXT
059250,000081: 17,2055 COUNT* $$/DAPT6
059251,000082:
059252,000083: 17,2055 10031 T6JOBCHK CCS TIME6 # CHECK TIME6 FOR WAITING T6RUPT:
059253,000084: 17,2056 00002 TC Q # NONE: CLOCK COUTING DOWN.
059254,000085: 17,2057 05675 TC CCSHOLE
059255,000086: 17,2060 05675 TC CCSHOLE
059256,000087:
059257,000088: # CONTROL PASSES TO T6JOB ONLY WHEN C(TIME6) = -0 (I.E. WHEN A T6RUPT MUST BE PROCESSED).
059258,000089:
059259,000090: 17,2061 34733 T6JOB CA POSMAX
059260,000091: 17,2062 22007 ZL
059261,000092: 17,2063 53471 DXCH T6FURTHA
059262,000093: 17,2064 53467 DXCH T6NEXT
059263,000094: 17,2065 23465 LXCH NXT6ADR
059264,000095: 17,2066 54031 TS TIME6
059265,000096:
059266,000097: 17,2067 67730 AD PRIO37
059267,000098: 17,2070 54000 TS A
059268,000099: 17,2071 12075 TCF ENABLET6
059269,000100: 17,2072 34733 CA POSMAX
059270,000101: 17,2073 54031 TS TIME6
059271,000102: 17,2074 12115 TCF GOCH56
059272,000103: 17,2075 00006 ENABLET6 EXTEND
059273,000104: 17,2076 23265 QXCH C13QSAV
059274,000105: 17,2077 22070 LXCH RUPTREG1
059275,000106: 17,2100 06022 TC C13STALL
059276,000107: 17,2101 00006 EXTEND
059277,000108: 17,2102 23265 QXCH C13QSAV
059278,000109: 17,2103 22070 LXCH RUPTREG1
059279,000110: 17,2104 34735 CAF BIT15
059280,000111: 17,2105 00006 EXTEND
059281,000112: 17,2106 05013 WOR CHAN13
059282,000113: 17,2107 31466 CA T6NEXT
059283,000114: 17,2110 67730 AD PRIO37
059284,000115: 17,2111 54000 TS A
059285,000116: 17,2112 12115 TCF GOCH56
059286,000117: 17,2113 34733 CA POSMAX
059287,000118: 17,2114 55466 TS T6NEXT
059288,000119: 17,2115 50001 GOCH56 INDEX L
059289,000120: 17,2116 15743 TCF WRITEP -1
059290,000121:
059291,000122: 5743 BLOCK 02
059292,000123: 4000 SETLOC FFTAG9
059293,000124: 4000 BANK
059294,000125: 5743 E6,1634 EBANK= CDUXD
059295,000126: 5743 COUNT* $$/DAPT6
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Page 1397
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059297,000128: 5743 31472 CA NEXTP
059298,000129: 5744 00006 WRITEP EXTEND
059299,000130: 5745 01006 WRITE CHAN6
059300,000131: 5746 00002 TC Q
059301,000132:
059302,000133: 5747 31473 CA NEXTU
059303,000134: 5750 54001 WRITEU TS L
059304,000135: 5751 45764 CS 00314OCT
059305,000136: 5752 00006 EXTEND
059306,000137: 5753 02005 RAND CHAN5
059307,000138: 5754 60001 AD L
059308,000139: 5755 00006 EXTEND
059309,000140: 5756 01005 WRITE CHAN5
059310,000141: 5757 00002 TC Q
059311,000142:
059312,000143: 5760 31474 CA NEXTV
059313,000144: 5761 54001 WRITEV TS L
059314,000145: 5762 35764 CA 00314OCT
059315,000146: 5763 15752 TCF -9D
059316,000147: 5764 00314 00314OCT OCT 00314
059317,000148:
059318,000149: 17,2117 BANK 17
059319,000150: 17,2000 SETLOC DAPS2
059320,000151: 17,2000 BANK
059321,000152:
059322,000153: 17,2117 E6,1466 EBANK= T6NEXT
059323,000154: 17,2117 COUNT* $$/DAPT6
059324,000155:
059325,000156: 17,2117 22016 DOT6RUPT LXCH BANKRUPT # (INTERRUPT LEAD INS CONTINUED)
059326,000157: 17,2120 00006 EXTEND
059327,000158: 17,2121 22012 QXCH QRUPT
059328,000159:
059329,000160: 17,2122 02055 TC T6JOBCHK # CALL T6JOBCHK.
059330,000161:
059331,000162: 17,2123 15270 TCF RESUME # END TIME6 INTERRUPT PROCESSOR.
059332,000163:
059333,000164:
End of include-file T6-RUPT_PROGRAMS.agc. Parent file is MAIN.agc