Co-authored-by: James Harris <wopian@wopian.me>
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# 16:27 JULY 14, 1969
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# Page 190
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# PROGRAM DESCRIPTION:
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# PROGRAM DESCRIPTION
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#
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# AUTHOR: J. S. MILLER
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# AUTHOR: J S MILLER
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#
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# MODIFIED 6 MARCH 1968 BY P. S. WEISSMAN TO SET UP JOB FOR 1/ACCS WHEN THE MASKS ARE CHANGED.
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# MODIFIED 6 MARCH 1968 BY P S WEISSMAN TO SET UP JOB FOR 1/ACCS WHEN THE MASKS ARE CHANGED.
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#
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# THIS ROUTINE IS ATTACHED TO T4RUPT, AND IS ENTERED EVERY 480 MS. ITS FUNCTION IS TO EXAMINE THE LOW 8 BITS
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# THIS ROUTINE IS ATTACHED TO T4RUPT, AND IS ENTERED EVERY 480 MS. ITS FUNCTION IS TO EXAMINE THE LOW 8 BITS
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# OF CHANNEL 32 TO SEE IF ANY ISOLATION-VALVE CLOSURE BITS HAVE APPEARED OR DISAPPEARED (THE CREW IS WARNED OF JET
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# FAILURES BY LAMPS LIT BY THE GRUMMAN FAILURE-DETECTION CIRCUITRY; THEY MAY RESPOND BY OPERATING SWITCHES WHICH
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# ISOLATE PAIRS OF JETS FROM THE PROPELLANT TANKS AND SET BITS IN CHANNEL 32). IN THE EVENT THAT CHANNEL 32 BITS
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# DIFFER FROM `PVALVEST', THE RECORD OF ACTIONS TAKEN BY THIS ROUTINE, THE APPROPRIATE BITS IN `CH5MASK' &
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# `CH6MASK', USED BY THE DAP JET-SELECTION LOGIC, ARE UPDATED, AS IS `PVALVEST'. TO SPEED UP & SHORTEN THE
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# DIFFER FROM 'PVALVEST', THE RECORD OF ACTIONS TAKEN BY THIS ROUTINE, THE APPROPRIATE BITS IN 'CH5MASK' &
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# 'CH6MASK', USED BY THE DAP JET-SELECTION LOGIC, ARE UPDATED, AS IS 'PVALVEST'. TO SPEED UP & SHORTEN THE
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# ROUTINE, NO MORE THAN ONE CHANGE IS ACCEPTED PER ENTRY. THE HIGHEST-NUMBERED BIT IN CHANNEL 32 WHICH REQUIRES
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# ACTION IS THE ONE PROCESSED.
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#
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# THE CODING IN THE FAILURE MONITOR HAS BEEN WRITTEN SO AS TO HAVE ALMOST COMPLETE RESTART PROTECTION. FOR
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# EXAMPLE, NO ASSUMPTION IS MADE WHEN SETTING A `CH5MASK' BIT TO 1 THAT THE PREVIOUS STATE IS 0, ALTHOUGH IT OF
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# THE CODING IN THE FAILURE MONITOR HAS BEEN WRITTEN SO AS TO HAVE ALMOST COMPLETE RESTART PROTECTION. FOR
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# EXAMPLE, NO ASSUMPTION IS MADE WHEN SETTING A 'CH5MASK' BIT TO 1 THAT THE PREVIOUS STATE IS 0, ALTHOUGH IT OF
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# COURSE SHOULD BE. ONE CASE WHICH MAY BE SEEN TO EVADE PROTECTION IS THE OCCURRENCE OF A RESTART AFTER UPDATING
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# ONE OR BOTH DAP MASK-WORDS BUT BEFORE UPDATING `PVALVEST', COUPLED WITH A CHANGE IN THE VALVE-BIT BACK TO ITS
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# ONE OR BOTH DAP MASK-WORDS BUT BEFORE UPDATING 'PVALVEST', COUPLED WITH A CHANGE IN THE VALVE-BIT BACK TO ITS
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# FORMER STATE. THE CONSEQUENCE OF THIS IS THAT THE NEXT ENTRY WOULD NOT SEE THE CHANGE INCOMPLETELY INCORP-
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# ORATED BY THE LAST PASS (BECAUSE IT WENT AWAY AT JUST THE RIGHT TIME), BUT THE DAP MASK-WORDS WILL BE INCORRECT.
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# THIS COMBINATION OF EVENTS SEEMS QUITE REMOTE, BUT NOT IMPOSSIBLE UNLESS THE CREW OPERATES THE SWITCHES AT HALF-
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@ -52,22 +52,21 @@
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#
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# CALLING SEQUENCE:
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#
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# TCF RCSMONIT # (IN INTERRUPT MODE, EVERY 480 MS.)
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# TCF RCSMONIT (IN INTERRUPT MODE, EVERY 480 MS.)
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#
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# EXIT: TCF RCSMONEX (ALL PATHS EXIT VIA SUCH AN INSTRUCTION)
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# EXIT: TCF RCSMONEX (ALL PATHS EXIT VIA SUCH AN INSTRUCTION)
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RCSMONEX EQUALS RESUME
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# ERASABLE INITIALIZATION REQUIRED:
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#
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# VIA FRESH START: PVALVEST = +0 (ALL JETS ENABLED)
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# CH5MASK,CH6MASK = +0 (ALL JETS OK)
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# VIA FRESH START: PVALVEST = +0 (ALL JETS ENABLED)
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# CH5MASK, CH6MASK = +0 (ALL JETS OK)
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#
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# OUTPUT: CH5MASK & CH6MASK UPDATED (1'S WHERE JETS NOT TO BE USED, IN CHANNEL 5 & 6 FORMAT)
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# PVALTEST UPDATED (1'S WHEN VALVE CLOSURES HAVE BEEN TRANSLATED INTO CH5MASK & CH6MASK; CHAN 32 FORMAT)
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# JOB TO DO 1/ACCS.
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# OUTPUT: CH5MASK & CH6MASK UPDATED (1'S WHERE JETS NOT TO BE USED, IN CHANNEL 5 & 6 FORMAT)
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# PVALTEST UPDATED (1.5 WHEN VALVE CLOSURES HAVE BEEN TRANSLATED INTO CH5MASK & CH6MASK; CHAN 32 FORMAT)
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# JOB TO DO 1/ACCS.
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#
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# DEBRIS: A, L, AND Q AND DEBRIS OF NOVAC.
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# DEBRIS: A, L, Q AND DEBRIS OF NOVAC.
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#
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# SUBROUTINE CALLED: NOVAC.
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@ -83,91 +82,92 @@ RCSMONIT EQUALS RCSMON
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RCSMON CS ZERO
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EXTEND
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RXOR CHAN32 # PICK UP + INVERT INVERTED CHANNEL 32.
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MASK LOW8 # KEEP JET-FAIL BITS ONLY.
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RXOR CHAN32 # PICK UP + INVERT INVERTED CHANNEL 32.
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MASK LOW8 # KEEP JET-FAIL BITS ONLY.
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TS Q
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CS PVALVEST # _ _
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MASK Q # FORM PC + PC.
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TS L # (P = PREVIOUS ISOLATION VALVE STATE,
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CS Q # C = CURRENT VALVE STATE (CH32)).
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CS PVALVEST # - -
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MASK Q # FORM PC + PC.
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TS L # (P = PREVIOUS ISOLATION VALVE STATE,
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CS Q # C = CURRENT VALVE STATE (CH 32)).
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MASK PVALVEST
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ADS L # RESULT NZ INDICATES ACTION REQUIRED.
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ADS L # RESULT NZ INDICATES ACTION REQUIRED.
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EXTEND
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BZF RCSMONEX # QUIT IF NO ACTION REQUIRED.
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BZF RCSMONEX # QUIT IF NO ACTION REQUIRED.
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EXTEND
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MP BIT7 # MOVE BITS 8-1 OF A TO 14-7 OF L.
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XCH L # ZERO TO L IN THE PROCESS.
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MP BIT7 # MOVE BITS 8 - 1 OF A TO 14 - 7 OF L.
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XCH L # ZERO TO L IN THE PROCESS.
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-3 INCR L
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DOUBLE # BOUND TO GET OVERFLOW IN THIS LOOP,
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OVSK # SINCE WE ASSURED INITIAL NZ IN A.
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DOUBLE # BOUND TO GET OVERFLOW IN THIS LOOP.
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OVSK # SINCE WE ASSURED INITIAL NZ IN A.
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TCF -3
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INDEX L
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CA BIT8 -1 # SAVE THE RELEVANT BIT (8-1).
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CA BIT8 -1 # SAVE THE RELEVANT BIT (8 - 1).
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TS Q
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MASK PVALVEST # LOOK AT PREVIOUS VALVE STATE BIT.
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MASK PVALVEST # LOOK AT PREVIOUS VALVE STATE BIT.
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CCS A
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TCF VOPENED # THE VALVE HAS JUST BEEN OPENED.
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TCF VOPENED # THE VALVE HAS JUST BEEN OPENED.
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CS CH5MASK # THE VALVE HAS JUST BEEN CLOSED.
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CS CH5MASK # THE VALVE HAS JUST BEEN CLOSED.
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INDEX L
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MASK 5FAILTAB
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ADS CH5MASK # SET INHIBIT BIT FOR CHANNEL 5 JET.
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ADS CH5MASK # SET INHIBIT BIT FOR CHANNEL 5 JET.
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CS CH6MASK
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INDEX L
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MASK 6FAILTAB
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ADS CH6MASK # SET INGIBIT BIT FOR CHANNEL 6 JET
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ADS CH6MASK # SET INGIBIT BIT FOR CHANNEL 6 JET.
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CA Q
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ADS PVALVEST # RECORD ACTION TAKEN.
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ADS PVALVEST # RECORD ACTION TAKEN.
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TCF 1/ACCFIX # SET UP 1/ACCJOB AND EXIT.
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TCF 1/ACCFIX # SET UP 1/ACCJOB AND EXIT.
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# Page 192
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VOPENED INDEX L # A VALVE HAS JUST BEEN OPENED.
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VOPENED INDEX L # A VALVE HAS JUST BEEN OPENED.
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CS 5FAILTAB
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MASK CH5MASK
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TS CH5MASK # REMOVE INHIBIT BIT FOR CHANNEL 5 JET.
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TS CH5MASK # REMOVE INHIBIT BIT FOR CHANNEL 5 JET.
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INDEX L
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CS 6FAILTAB
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MASK CH6MASK
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TS CH6MASK # REMOVE INHIBIT BIT FOR CHANNEL 6 JET.
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TS CH6MASK # REMOVE INHIBIT BIT FOR CHANNEL 6 JET.
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CS Q
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MASK PVALVEST
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TS PVALVEST # RECORD ACTION TAKEN.
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TS PVALVEST # RECORD ACTION TAKEN.
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1/ACCFIX CAF PRIO27 # SET UP 1/ACCS SO THAT THE SWITCH CURVES
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TC NOVAC # FOR TJETLAW CAN BE MODIFIED IF CH5MASK
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EBANK= AOSQ # HAS BEEN ALTERED.
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1/ACCFIX CAF PRIO27 # SET UP 1/ACCS SO THAT THE SWITCH CURVES
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TC NOVAC # FOR TJETLAW CAN BE MODIFIED IF CH5MASK
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EBANK= AOSQ # HAS BEEN ALTERED.
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2CADR 1/ACCJOB
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TCF RCSMONEX # EXIT.
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5FAILTAB EQUALS -1 # CH 5 JET BIT CORRESPONDING TO CH 32 BIT:
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OCT 00040 # 8
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OCT 00020 # 7
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OCT 00100 # 6
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OCT 00200 # 5
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OCT 00010 # 4
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OCT 00001 # 3
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OCT 00004 # 2
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OCT 00002 # 1
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6FAILTAB EQUALS -1 # CH 6 JET BIT CORRESPONDING TO CH 32 BIT:
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OCT 00010 # 8
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OCT 00020 # 7
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OCT 00004 # 6
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OCT 00200 # 5
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OCT 00001 # 4
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OCT 00002 # 3
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OCT 00040 # 2
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OCT 00100 # 1
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TCF RCSMONEX # EXIT.
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5FAILTAB EQUALS -1 # CH 5 JET BIT CORRESPONDING TO CH 32 BIT:
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OCT 00040 # 8
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OCT 00020 # 7
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OCT 00100 # 6
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OCT 00200 # 5
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OCT 00010 # 4
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OCT 00001 # 3
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OCT 00004 # 2
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OCT 00002 # 1
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6FAILTAB EQUALS -1 # CH 6 JET BIT CORRESPONDING TO CH 32 BIT:
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OCT 00010 # 8
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OCT 00020 # 7
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OCT 00004 # 6
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OCT 00200 # 5
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OCT 00001 # 4
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OCT 00002 # 3
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OCT 00040 # 2
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OCT 00100 # 1
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