Source Code
![]() |
These source-code files were derived from scans of the
Colossus 237 program listing from the private collection of original
AGC developer Fred Martin. Scanning was by Ron Burkey. Pre-existing Colossus 249
(Apollo 9) source files were used as a template, and changes between Colossus 249
and Colossus 237 were manually transcribed by a team of volunteers. Note
that the page images
presented online are of reduced quality, and that additional images
are available. Report any conversion errors or legibility
problems in page images to info@sandroid.org.
Notations on the program listing read, in part:GAP: ASSEMBLE REVISION 237 OF AGC PROGRAM COLOSSUS BY NASA 2021111-031 1:17 AUG. 24, 1968Note that the date is the date of the printout, not the date of the program revision. |
059638,000002: ## Copyright: Public domain.
059639,000003: ## Filename: KEYRUPT_UPRUPT.agc
059640,000004: ## Purpose: Part of the source code for Colossus build 237.
059641,000005: ## This is for the Command Module's (CM) Apollo Guidance
059642,000006: ## Computer (AGC), we believe for Apollo 8.
059643,000007: ## Assembler: yaYUL
059644,000008: ## Contact: Jim Lawton <jim DOT lawton AT gmail DOT com>
059645,000009: ## Website: www.ibiblio.org/apollo/index.html
059646,000010: ## Page Scans: www.ibiblio.org/apollo/ScansForConversion/Colossus237/
059647,000011: ## Mod history: 2011-04-17 JL Adapted from corresponding Colossus 249 file.
059648,000012:
![]() |
Page 1413 |
059650,000014: 14,3751 BANK 14
059651,000015: 07,2000 SETLOC KEYRUPT
059652,000016: 07,2000 BANK
059653,000017: 07,3613 COUNT* $$/KEYUP
059654,000018:
059655,000019: 07,3613 54016 KEYRUPT1 TS BANKRUPT
059656,000020: 07,3614 56002 XCH Q
059657,000021: 07,3615 54012 TS QRUPT
059658,000022: 07,3616 04414 TC LODSAMPT # TIME IS SNATCHED IN RUPT FOR NOUN 65.
059659,000023: 07,3617 34362 CAF LOW5
059660,000024: 07,3620 00006 EXTEND
059661,000025: 07,3621 02015 RAND MNKEYIN # CHECK IF KEYS 5M-IM ON
059662,000026: 07,3622 54073 KEYCOM TS RUPTREG4
059663,000027: 07,3623 40101 CS FLAGWRD5
059664,000028: 07,3624 74674 MASK BIT15
059665,000029: 07,3625 26101 ADS FLAGWRD5
059666,000030:
059667,000031: 07,3626 34371 ACCEPTUP CAF CHRPRIO # (NOTE: RUPTREG4 = KEYTEMP1)
059668,000032: 07,3627 05027 TC NOVAC
059669,000033: 07,3630 0777 EBANK= DSPCOUNT
059670,000034: 07,3630 02000 60101 2CADR CHARIN
059671,000035: 07,3632 30073 CA RUPTREG4
059672,000036: 07,3633 50064 INDEX LOCCTR
059673,000037: 07,3634 54154 TS MPAC # LEAVE 5 BIT KEY CODE IN MPAC FOR CHARIN
059674,000038: 07,3635 05222 TC RESUME
059675,000039:
![]() |
Page 1414 |
059677,000041: # UPRUPT PROGRAM
059678,000042:
059679,000043: 07,3636 54016 UPRUPT TS BANKRUPT
059680,000044: 07,3637 56002 XCH Q
059681,000045: 07,3640 54012 TS QRUPT
059682,000046: 07,3641 04414 TC LODSAMPT # TIME IS SNATCHED IN RUPT FOR NOUN 65.
059683,000047: 07,3642 34714 CAF ZERO
059684,000048: 07,3643 56045 XCH INLINK
059685,000049: 07,3644 54073 TS KEYTEMP1
059686,000050: 07,3645 34710 CAF BIT3 # TURN ON UPACT LIGHT
059687,000051: 07,3646 00006 EXTEND # (BIT 3 OF CHANNEL 11)
059688,000052: 07,3647 05011 WOR DSALMOUT
059689,000053: 07,3650 34362 UPRPT1 CAF LOW5 # TEST FOR TRIPLE CHAR REDUNDANCY
059690,000054: 07,3651 70073 MASK KEYTEMP1 # LOW5 OF WORD
059691,000055: 07,3652 56073 XCH KEYTEMP1 # LOW5 INTO KEYTEMP1
059692,000056: 07,3653 00006 EXTEND
059693,000057: 07,3654 74701 MP BIT10 # SHIFT RIGHT 5
059694,000058: 07,3655 54734 TS KEYTEMP2
059695,000059: 07,3656 74362 MASK LOW5 # MID 5
059696,000060: 07,3657 63713 AD HI10
059697,000061: 07,3660 03710 TC UPTEST
059698,000062: 07,3661 34701 CAF BIT10
059699,000063: 07,3662 00006 EXTEND
059700,000064: 07,3663 70734 MP KEYTEMP2 # SHIFT RIGHT 5
059701,000065: 07,3664 74362 MASK LOW5 # HIGH 5
059702,000066: 07,3665 40000 COM
059703,000067: 07,3666 03710 TC UPTEST
059704,000068:
059705,000069: 07,3667 43716 UPCK CS ELRCODE # CODE IS GOOD. IF CODE = 'ERROR RESET',
059706,000070: 07,3670 60073 AD KEYTEMP1 # CLEAR UPLOCKFL(SET BIT4 OF FLAGWRD7 = 0)
059707,000071: 07,3671 00006 EXTEND # IF CODE DOES NOT = 'ERROR RESET', ACCEPT
059708,000072: 07,3672 13700 BZF CLUPLOCK # CODE ONLY IF UPLOCKFL IS CLEAR (=0).
059709,000073:
059710,000074: 07,3673 34707 CAF BIT4 # TEST UPLOCKFL FOR 0 OR 1
059711,000075: 07,3674 70103 MASK FLAGWRD7
059712,000076: 07,3675 10000 CCS A
059713,000077: 07,3676 05222 TC RESUME # UPLOCKFL = 1
059714,000078: 07,3677 03626 TC ACCEPTUP # UPLOCKFL = 0
059715,000079:
059716,000080: 07,3700 44707 CLUPLOCK CS BIT4 # CLEAR UPLOCKFL (I.E., SET BIT 4 OF
059717,000081: 07,3701 70103 MASK FLAGWRD7 # FLAGWRD7 = 0)
059718,000082: 07,3702 54103 TS FLAGWRD7
059719,000083: 07,3703 03626 TC ACCEPTUP
059720,000084:
059721,000085: # CODE IS BAD
059722,000086: 07,3704 40103 TMFAIL2 CS FLAGWRD7 # LOCK OUT FURTHER UPLINK ACTIVITY
059723,000087: 07,3705 74707 MASK BIT4 # (BY SETTING UPLOCKFL = 1) UNTIL
059724,000088: 07,3706 26103 ADS FLAGWRD7 # 'ERROR RESET' IS SENT VIA UPLINK.
059725,000089: 07,3707 05222 TC RESUME
059726,000090: 07,3710 60073 UPTEST AD KEYTEMP1
![]() |
Page 1415 |
059728,000092: 07,3711 10000 CCS A
059729,000093: 07,3712 03704 TC TMFAIL2
059730,000094: 07,3713 77740 HI10 OCT 77740
059731,000095: 07,3714 03704 TC TMFAIL2
059732,000096: 07,3715 00002 TC Q
059733,000097:
059734,000098: 07,3716 00022 ELRCODE OCT 22
059735,000099:
059736,000100: # 'UPLINK ACTIVITY LIGHT' IS TURNED OFF BY .....
059737,000101: # 1. VBRELDSP
059738,000102: # 2. ERROR RESET
059739,000103: # 3. UPDATE PROGRAM(P27) ENTERED BY V70,V71,V72,AND V73.
059740,000104:
059741,000105:
059742,000106:
059743,000107: # THE RECEPTION OF A BAD CODE(I.E CCC FAILURE) LOCKS OUT FURTHER UPLINK ACTIVITY BY SETTING BIT4 OF FLAGWRD7 = 1.
059744,000108: # THIS INDICATION WILL BE TRANSFERRED TO THE GROUND BY THE DOWNLINK WHICH DOWNLINKS ALL FLAGWORDS.
059745,000109: # WHEN UPLINK ACTIVITY IS LOCKED OUT ,IT CAN BE ALLOWED WHEN THE GROUND UPLINKS AND 'ERROR RESET' CODE.
059746,000110: # (IT IS RECOMMENDED THAT THE 'ERROR LIGHT RESET' CODE IS PRECEEDED BY 16 BITS THE FIRST OF WHICH IS 1 FOLLOWED
059747,000111: # BY 15 ZEROES. THIS WILL ELIMINATE EXTRANEOUS BITS FROM INLINK WHICH MAY HAVE BEEN LEFT OVER FROM THE ORIGINAL
059748,000112: # FAILURE)
059749,000113: # 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