2016-07-07 08:47:26 +00:00
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# Copyright: Public domain.
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# Filename: KEYRUPT_UPRUPT.agc
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# Purpose: Part of the source code for Comanche, build 055. It
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# is part of the source code for the Command Module's
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# (CM) Apollo Guidance Computer (AGC), Apollo 11.
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# Assembler: yaYUL
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# Reference: pp. 1449-1451
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# Contact: Ron Burkey <info@sandroid.org>
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# Website: http://www.ibiblio.org/apollo.
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# Mod history: 2009-05-07 RSB Adapted from Colossus249 file of the same
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# name, and page images. Corrected various
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# typos in the transcription of program
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# comments, and these should be back-ported
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# to Colossus249.
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#
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# The contents of the "Comanche055" files, in general, are transcribed
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# from scanned documents.
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#
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# Assemble revision 055 of AGC program Comanche by NASA
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# 2021113-051. April 1, 1969.
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#
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# This AGC program shall also be referred to as Colossus 2A
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#
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# Prepared by
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2016-07-11 12:35:15 +00:00
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# Massachusetts Institute of Technology
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2016-07-07 08:47:26 +00:00
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# 75 Cambridge Parkway
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# Cambridge, Massachusetts
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#
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# under NASA contract NAS 9-4065.
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#
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# Refer directly to the online document mentioned above for further
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# information. Please report any errors to info@sandroid.org.
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# Page 1449
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BANK 14
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SETLOC KEYRUPT
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BANK
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COUNT* $$/KEYUP
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KEYRUPT1 TS BANKRUPT
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XCH Q
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TS QRUPT
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TC LODSAMPT # TIME IS SNATCHED IN RUPT FOR NOUN 65.
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CAF LOW5
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EXTEND
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RAND MNKEYIN # CHECK IF KEYS 5M-1M ON
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KEYCOM TS RUPTREG4
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CS FLAGWRD5
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MASK BIT15
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ADS FLAGWRD5
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ACCEPTUP CAF CHRPRIO # (NOTE: RUPTREG4 = KEYTEMP1)
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TC NOVAC
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EBANK= DSPCOUNT
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2CADR CHARIN
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CA RUPTREG4
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INDEX LOCCTR
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TS MPAC # LEAVE 5 BIT KEY CODE IN MPAC FOR CHARIN
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TC RESUME
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# Page 1450
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# UPRUPT PROGRAM
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UPRUPT TS BANKRUPT
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XCH Q
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TS QRUPT
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TC LODSAMPT # TIME IS SNATCHED IN RUPT FOR NOUN 65.
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CAF ZERO
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XCH INLINK
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TS KEYTEMP1
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CAF BIT3 # TURN ON UPACT LIGHT
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EXTEND # (BIT 3 OF CHANNEL 11)
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WOR DSALMOUT
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UPRPT1 CAF LOW5 # TEST FOR TRIPLE CHAR REDUNDANCY
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MASK KEYTEMP1 # LOW5 OF WORD
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XCH KEYTEMP1 # LOW5 INTO KEYTEMP1
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EXTEND
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MP BIT10 # SHIFT RIGHT 5
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TS KEYTEMP2
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MASK LOW5 # MID 5
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AD HI10
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TC UPTEST
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CAF BIT10
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EXTEND
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MP KEYTEMP2 # SHIFT RIGHT 5
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MASK LOW5 # HIGH 5
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COM
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TC UPTEST
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UPOK CS ELRCODE # CODE IS GOOD. IF CODE = `ERROR RESET',
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AD KEYTEMP1 # CLEAR UPLOCKFL (SET BIT4 OF FLAGWRD7 = 0)
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EXTEND # IF CODE DOES NOT = `ERROR RESET', ACCEPT
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BZF CLUPLOCK # CODE ONLY IF UPLOCKFL IS CLEAR (=0).
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CAF BIT4 # TEST UPLOCKFL FOR 0 OR 1
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MASK FLAGWRD7
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CCS A
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TC RESUME # UPLOCKFL = 1
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TC ACCEPTUP # UPLOCKFL = 0
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CLUPLOCK CS BIT4 # CLEAR UPLOCKFL (I.E., SET BIT 4 OF
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MASK FLAGWRD7 # FLAGWRD7 = 0)
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TS FLAGWRD7
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TC ACCEPTUP
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# CODE IS BAD
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TMFAIL2 CS FLAGWRD7 # LOCK OUT FURTHER UPLINK ACTIVITY
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MASK BIT4 # (BY SETTING UPLOCKFL = 1) UNTIL
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ADS FLAGWRD7 # `ERROR RESET' IS SENT VIA UPLINK.
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TC RESUME
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UPTEST AD KEYTEMP1
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# Page 1451
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CCS A
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TC TMFAIL2
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HI10 OCT 77740
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TC TMFAIL2
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TC Q
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ELRCODE OCT 22
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# `UPLINK ACTIVITY LIGHT' IS TURNED OFF BY .....
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# 1. VBRELDSP
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# 2. ERROR RESET
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# 3. UPDATE PROGRAM (P27) ENTERED BY V70,V71,V72, AND V73.
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#
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# THE RECEPTION OF A BAD CODE (I.E., CCC FAILURE) LOCKS OUT FURTHER UPLINK ACTIVITY BY SETTING BIT4 OF FLAGWRD7 = 1.
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# THIS INDICATION WILL BE TRANSFERRED TO THE GROUND BY THE DOWNLINK WHICH DOWNLINKS ALL FLAGWORDS.
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# WHEN UPLINK ACTIVITY IS LOCKED OUT, IT CAN BE ALLOWED WHEN THE GROUND UPLINKS AND `ERROR RESET' CODE.
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2016-07-12 23:52:11 +00:00
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# (IT IS RECOMMENDED THAT THE `ERROR LIGHT RESET' CODE IS PRECEEDED BY 16 BITS THE FIRST OF WHICH IS 1 FOLLOWED
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2016-07-07 08:47:26 +00:00
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# BY 15 ZEROS. THIS WILL ELIMINATE EXTRANEOUS BITS FROM INLINK WHICH MAY HAVE BEEN LEFT OVER FROM THE ORIGINAL
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# FAILURE).
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#
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# UPLINK ACTIVITY IS ALSO ALLOWED (UNLOCKED) DURING FRESH START WHEN FRESH START SETS BIT4 OF FLAGWRD7 = 0.
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