Source Code
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These source-code files are part of a reconstructed copy of Comanche 72/3 (AKA Manche72 revision 3),
the final, flown mission release of the Apollo Guidance Computer (AGC) Command Module (CM) software
for Apollo 13.
The starting point was the source code of Comanche 72 (itself previously reconstructed). Comanche 72
source code was then modified by incorporating changes known from contemporary documentation to have
been made between revisions 72 and 72/3. The resulting code assembles to have identical
memory-bank checksums as those specified in NASA drawing 2021153G; this gives reasonably
high confidence that the changes that have been made are correct. In places where
ambiguity exists, this ambiguity is discussed in "## Reconstruction:" comments.
Since no contemporary listings of Comanche 72/3 are available as source material,
all comments and labels are approximate.
They have been taken from other AGC programs where possible, or, in some places, written
from scratch to match what we believe would have been in the original listing.
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005195,000002: ## Copyright: Public domain.
005196,000003: ## Filename: INTERRUPT_LEAD_INS.agc
005197,000004: ## Purpose: A section of Manche72 revision 3.
005198,000005: ## It is part of the reconstructed source code for the final, flown
005199,000006: ## release of the software for the Command Module's (CM) Apollo
005200,000007: ## Guidance Computer (AGC) for Apollo 13. No original listings
005201,000008: ## of this program are available; instead, this file was recreated
005202,000009: ## from a reconstructed copy of Comanche 072. It has been adapted
005203,000010: ## such that the resulting bugger words exactly match those
005204,000011: ## specified for Manche72 revision 3 in NASA drawing 2021153G,
005205,000012: ## which gives relatively high confidence that the reconstruction
005206,000013: ## is correct.
005207,000014: ## Assembler: yaYUL
005208,000015: ## Contact: Ron Burkey <info@sandroid.org>.
005209,000016: ## Website: www.ibiblio.org/apollo/index.html
005210,000017: ## Mod history: 2024-05-19 MAS Created from Comanche 072.
005211,000018:
005212,000019: 4000 SETLOC 4000
005213,000020:
005214,000021: 4000 COUNT 02/RUPTS
005215,000022:
005216,000023: 4000 00004 INHINT # GO
005217,000024: 4001 34054 CAF GOBB
005218,000025: 4002 56006 XCH BBANK
005219,000026: 4003 12526 TCF GOPROG
005220,000027:
005221,000028: 4004 52011 DXCH ARUPT # T6RUPT
005222,000029: 4005 00006 EXTEND
005223,000030: 4006 31311 DCA T6LOC
005224,000031: 4007 52006 DTCB
005225,000032:
005226,000033: 4010 52011 DXCH ARUPT # T5RUPT
005227,000034: 4011 40030 CS TIME5
005228,000035: 4012 65052 AD .5SEC
005229,000036: 4013 14065 TCF T5RUPT
005230,000037:
005231,000038: 4014 52011 DXCH ARUPT # T3RUPT
005232,000039: 4015 34055 CAF T3RPTBB
005233,000040: 4016 56006 XCH BBANK
005234,000041: 4017 13416 TCF T3RUPT
005235,000042:
005236,000043: 4020 52011 DXCH ARUPT # T4RUPT
005237,000044: 4021 34063 CAF T4RPTBB
005238,000045: 4022 56006 XCH BBANK
005239,000046: 4023 12000 TCF T4RUPT
005240,000047:
005241,000048: 4024 52011 DXCH ARUPT # KEYRUPT1
005242,000049: 4025 34056 CAF KEYRPTBB
005243,000050: 4026 56006 XCH BBANK
005244,000051: 4027 13673 TCF KEYRUPT1
005245,000052:
005246,000053: 4030 52011 DXCH ARUPT # KEYRUPT2
005247,000054: 4031 34057 CAF MKRUPTBB
005248,000055: 4032 56006 XCH BBANK
005249,000056: 4033 12104 TCF MARKRUPT
005250,000057:
005251,000058: 4034 52011 DXCH ARUPT # UPRUPT
005252,000059: 4035 34056 CAF UPRPTBB
005253,000060: 4036 56006 XCH BBANK
005254,000061: 4037 13716 TCF UPRUPT
005255,000062:
005256,000063: 4040 52011 DXCH ARUPT # DOWNRUPT
005257,000064: 4041 34060 CAF DWNRPTBB
005258,000065: 4042 56006 XCH BBANK
005259,000066: 4043 14662 TCF DODOWNTM
005260,000067:
005261,000068: 4044 52011 DXCH ARUPT # RADAR RUPT
005262,000069: 4045 34061 CAF RDRPTBB
005263,000070: 4046 56006 XCH BBANK
005264,000071: 4047 12505 TCF VHFREAD
005265,000072:
005266,000073: 4050 52011 DXCH ARUPT # HAND CONTROL RUPT
005267,000074: 4051 34062 CAF HCRUPTBB
005268,000075: 4052 56006 XCH BBANK
005269,000076: 4053 15352 TCF RESUME +3 # NOT USED
005270,000077:
005271,000078: 4054 E3,1400 EBANK= LST1 # RESTART USES E0,E3
005272,000079: 4054 12063 GOBB BBCON GOPROG
005273,000080:
005274,000081: 4055 E3,1400 EBANK= LST1
005275,000082: 4055 02063 T3RPTBB BBCON T3RUPT
005276,000083:
005277,000084: 4056 0073 EBANK= KEYTEMP1
005278,000085: 4056 16060 KEYRPTBB BBCON KEYRUPT1
005279,000086:
005280,000087: 4057 E7,1725 EBANK= MRKBUF1
005281,000088: 4057 16067 MKRUPTBB BBCON MARKRUPT
005282,000089:
005283,000090: 4060 4056 UPRPTBB = KEYRPTBB
005284,000091:
005285,000092: 4060 0337 EBANK= DNTMBUFF
005286,000093: 4060 12060 DWNRPTBB BBCON DNPHASE1
005287,000094:
005288,000095: 4061 E7,1603 EBANK= DATATEST
005289,000096: 4061 56067 RDRPTBB BBCON VHFREAD
005290,000097:
005291,000098: 4062 0025 EBANK= TIME1
005292,000099: 4062 04060 HCRUPTBB BBCON RESUME # NOT USED
005293,000100:
005294,000101: 4063 1302 EBANK= DSRUPTSW
005295,000102: 4063 14062 T4RPTBB BBCON T4RUPT
005296,000103:
005297,000104: 4064 0025 EBANK= TIME1
005298,000105: 4064 04060 T5RPTBB BBCON T5RUPT
005299,000106:
005300,000107: 4065 00006 T5RUPT EXTEND
005301,000108: 4066 65353 BZMF NOQBRSM
005302,000109: 4067 00006 EXTEND
005303,000110: 4070 31313 DCA T5LOC
005304,000111: 4071 52006 DTCB
005305,000112:
005306,000113:
005307,000114:
End of include-file INTERRUPT_LEAD_INS.agc. Parent file is MAIN.agc