Source Code
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These source-code files are part of a reconstructed copy of Artemis 071, the
first release of the Apollo 15 through 17 Command Module (CM) Apollo Guidance
Computer (AGC) software.
The reconstruction began with source code of Artemis 072 previously transcribed
from a digitized copy of that program. The code was then updated by undoing
changes between the two versions. The reconstruction was verified by matching
memory-bank checksums to those listed in drawing 2021154-. Note that page
numbers in the reconstructed code match those on the Artemis 072 printout,
although the changed code would likely have changed page numbers for a real
Artemis 071 listing.
Comments from the original source code are prefixed with a single '#' symbol,
whereas comments added later are prefixed by "##" or "###". Report any errors
noted by creating an
issue report at the Virtual AGC
project's GitHub repository.
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061779,000002: ## Copyright: Public domain.
061780,000003: ## Filename: KEYRUPT,_UPRUPT.agc
061781,000004: ## Purpose: A section of Artemis revision 071.
061782,000005: ## It is part of the reconstructed source code for the first
061783,000006: ## release of the flight software for the Command Module's
061784,000007: ## (CM) Apollo Guidance Computer (AGC) for Apollo 15 through
061785,000008: ## 17. The code has been recreated from a copy of Artemis 072.
061786,000009: ## It has been adapted such that the resulting bugger words
061787,000010: ## exactly match those specified for Artemis 071 in NASA
061788,000011: ## drawing 2021154-, which gives relatively high confidence
061789,000012: ## that the reconstruction is correct.
061790,000013: ## Reference: 1445
061791,000014: ## Assembler: yaYUL
061792,000015: ## Contact: Ron Burkey <info@sandroid.org>.
061793,000016: ## Website: www.ibiblio.org/apollo/index.html
061794,000017: ## Mod history: 2019-08-14 MAS Created from Artemis 072.
061795,000018:
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Page 1445
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061797,000020:
061798,000021: 07,2000 SETLOC KEYRUPT
061799,000022: 07,2000 BANK
061800,000023: 07,3666 COUNT* $$/KEYUP
061801,000024:
061802,000025: 07,3666 54016 KEYRUPT1 TS BANKRUPT
061803,000026: 07,3667 56002 XCH Q
061804,000027: 07,3670 54012 TS QRUPT
061805,000028: 07,3671 04366 TC LODSAMPT # TIME IS SNATCHED IN RUPT FOR NOUN 65.
061806,000029: 07,3672 34342 CAF LOW5
061807,000030: 07,3673 00006 EXTEND
061808,000031: 07,3674 02015 RAND MNKEYIN # CHECK IF KEYS 5M-1M ON
061809,000032: 07,3675 54073 KEYCOM TS RUPTREG4
061810,000033: 07,3676 40101 CS FLAGWRD5
061811,000034: 07,3677 74752 MASK DSKYBIT
061812,000035: 07,3700 26101 ADS FLAGWRD5
061813,000036:
061814,000037: 07,3701 05120 ACCEPTUP TC NOVAC30 # (NOTE: RUPTREG4 = KEYTEMP1)
061815,000038: 07,3702 1202 EBANK= DSPCOUNT
061816,000039: 07,3702 02000 60102 2CADR CHARIN
061817,000040:
061818,000041: 07,3704 30073 CA RUPTREG4
061819,000042: 07,3705 50064 INDEX LOCCTR
061820,000043: 07,3706 54154 TS MPAC # LEAVE 5 BIT KEY CDE IN MPAC FOR CHARIN
061821,000044: 07,3707 05323 TC RESUME
061822,000045:
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Page 1446
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061824,000047:
061825,000048: # UPRUPT PROGRAM
061826,000049:
061827,000050: 07,3710 54016 UPRUPT TS BANKRUPT
061828,000051: 07,3711 56002 XCH Q
061829,000052: 07,3712 54012 TS QRUPT
061830,000053: 07,3713 04366 TC LODSAMPT # TIME IS SNATCHED IN RUPT FOR NOUN 65.
061831,000054: 07,3714 34772 CAF ZERO
061832,000055: 07,3715 56045 XCH INLINK
061833,000056: 07,3716 54073 TS KEYTEMP1
061834,000057: 07,3717 30075 CA FLAGWRD1
061835,000058: 07,3720 74755 MASK NOP01BIT # IF = , MISSION IS IN
061836,000059: 07,3721 10000 CCS A # PRELAUNCH AND UPLINK DATA SUM IS ENABLED
061837,000060: 07,3722 13726 TCF +4 # IF FLAGWORD1 BIT 12 =1, IT IS NOT
061838,000061: 07,3723 30073 CA KEYTEMP1 # ALLOWED.
061839,000062: 07,3724 27116 ADS UPSUM
061840,000063: 07,3725 25117 INCR UPSUM +1
061841,000064: 07,3726 34766 CAF BIT3 # TURN ON UPACT LIGHT
061842,000065: 07,3727 00006 EXTEND # (BIT 3 OF CHANNEL 11)
061843,000066: 07,3730 05011 WOR DSALMOUT
061844,000067: 07,3731 34342 UPRPT1 CAF LOW5 # TEST FOR TRIPLE CHAR REDUNDANCY
061845,000068: 07,3732 70073 MASK KEYTEMP1 # LOW5 OF WORD
061846,000069: 07,3733 56073 XCH KEYTEMP1 # LOW5 INTO KEYTEMP1
061847,000070: 07,3734 00006 EXTEND
061848,000071: 07,3735 74757 MP BIT10 # SHIFT RIGHT 5
061849,000072: 07,3736 55137 TS KEYTEMP2
061850,000073: 07,3737 74342 MASK LOW5 # MID 5
061851,000074: 07,3740 63774 AD HI10
061852,000075: 07,3741 03771 TC UPTEST
061853,000076: 07,3742 34757 CAF BIT10
061854,000077: 07,3743 00006 EXTEND
061855,000078: 07,3744 71137 MP KEYTEMP2 # SHIFT RIGHT 5
061856,000079: 07,3745 74342 MASK LOW5 # HIGH 5
061857,000080: 07,3746 40000 COM
061858,000081: 07,3747 03771 TC UPTEST
061859,000082:
061860,000083: 07,3750 45000 UPOK CS ELRCODE # CODE IS GOOD. IF CODE = 'ERROR RESET',
061861,000084: 07,3751 60073 AD KEYTEMP1 # CLEAR UPLOCKFL (SET BIT4 OF FLAGWRD7 = 0)
061862,000085: 07,3752 00006 EXTEND # IF CODE DOES NOT = 'ERROR RESET', ACCEPT
061863,000086: 07,3753 13761 BZF CLUPLOCK # CODE ONLY IF UPLOCKFL IS CLEAR (=0).
061864,000087:
061865,000088: 07,3754 34765 CAF UPLOCBIT # TEST UPLOCKFL FOR 0 OR 1
061866,000089: 07,3755 70103 MASK FLAGWRD7
061867,000090: 07,3756 10000 CCS A
061868,000091: 07,3757 05323 TC RESUME # UPLOCKFL = 1
061869,000092: 07,3760 03701 TC ACCEPTUP # UPLOCKFL = 0
061870,000093:
061871,000094: 07,3761 44765 CLUPLOCK CS UPLOCBIT # CLEAR UPLOCKFL (I.E., SET BIT 4 OF
061872,000095: 07,3762 70103 MASK FLAGWRD7 # FLAGWRD7 = 0)
061873,000096: 07,3763 54103 TS FLAGWRD7
061874,000097: 07,3764 03701 TC ACCEPTUP
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Page 1447
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061876,000099: # CODE IS BAD
061877,000100: 07,3765 40103 TMFAIL2 CS FLAGWRD7 # LOCK OUT FURTHER UPLINK ACTIVITY
061878,000101: 07,3766 74765 MASK UPLOCBIT # (BY SETTING UPLOCKFL = 1) UNTIL
061879,000102: 07,3767 26103 ADS FLAGWRD7 # 'ERROR RESET' IS SENT VIA UPLINK.
061880,000103: 07,3770 05323 TC RESUME
061881,000104: 07,3771 60073 UPTEST AD KEYTEMP1
061882,000105: 07,3772 10000 CCS A
061883,000106: 07,3773 03765 TC TMFAIL2
061884,000107: 07,3774 77740 HI10 OCT 77740
061885,000108: 07,3775 03765 TC TMFAIL2
061886,000109: 07,3776 00002 TC Q
061887,000110:
061888,000111: 07,3777 5000 ELRCODE EQUALS OCT22
061889,000112:
061890,000113: # 'UPLINK ACTIVITY LIGHT' IS TURNED OFF BY .....
061891,000114: # 1. VBRELDSP
061892,000115: # 2. ERROR RESET
061893,000116: # 3. UPDATE PROGRAM (P27) ENTERED BY V70,V71,V72, AND V73.
061894,000117:
061895,000118: # -
061896,000119: # THE RECEPTION OF A BAD CODE (I.E CCC FAILURE) LOCKS OUT FURTHER UPLINK ACTIVITY BY SETTING BIT4 OF FLAGWRD7 = 1.
061897,000120: # THIS INDICATION WILL BE TRANSFERRED TO THE GROUND BY THE DOWNLINK WHICH DOWNLINKS ALL FLAGWORDS.
061898,000121: # WHEN UPLINK ACTIVITY IS LOCKED OUT, IT CAN BE ALLOWED WHEN THE GROUND UPLINKS AND 'ERROR RESET' CODE.
061899,000122: # (IT IS RECOMMENDED THAT THE 'ERROR LIGHT RESET' CODE IS PRECEEDED BY 16 BITS THE FIRST OF WHICH IS 1 FOLLOWED
061900,000123: # BY 15 ZEROES. THIS WILL ELIMINATE EXTRANEOUS BITS FROM INLINK WHICH MAY HAVE BEEN LEFT OVER FROM THE ORIGINAL
061901,000124: # FAILURE)
061902,000125:
061903,000126: # UPLINK ACTIVITY IS ALSO ALLOWED (UNLOCKED) DURING FRESH START WHEN FRESH START SETS BIT4 OF FLAGWRD7 = 0.
End of include-file KEYRUPT,_UPRUPT.agc. Parent file is MAIN.agc