kjodle/Apollo-11
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Proof RCS_FAILURE_MONITOR #631 (#711)

Browse Source 
Co-authored-by: James Harris <wopian@wopian.me>
This commit is contained in:
y yam 2020-10-14 02:53:32 +09:00 committed by GitHub
parent 3b9f70628c
commit 33db89d305
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 66 additions and 66 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
Luminary099/RCS_FAILURE_MONITOR.agc
View File

@ -25,25 +25,25 @@
# 16:27 JULY 14, 1969
# Page 190
# PROGRAM DESCRIPTION:
# PROGRAM DESCRIPTION
#
# AUTHOR: J. S. MILLER
# AUTHOR: J S MILLER
#
# MODIFIED 6 MARCH 1968 BY P. S. WEISSMAN TO SET UP JOB FOR 1/ACCS WHEN THE MASKS ARE CHANGED.
# MODIFIED 6 MARCH 1968 BY P S WEISSMAN TO SET UP JOB FOR 1/ACCS WHEN THE MASKS ARE CHANGED.
#
# THIS ROUTINE IS ATTACHED TO T4RUPT, AND IS ENTERED EVERY 480 MS. ITS FUNCTION IS TO EXAMINE THE LOW 8 BITS
# OF CHANNEL 32 TO SEE IF ANY ISOLATION-VALVE CLOSURE BITS HAVE APPEARED OR DISAPPEARED (THE CREW IS WARNED OF JET
# FAILURES BY LAMPS LIT BY THE GRUMMAN FAILURE-DETECTION CIRCUITRY; THEY MAY RESPOND BY OPERATING SWITCHES WHICH
# ISOLATE PAIRS OF JETS FROM THE PROPELLANT TANKS AND SET BITS IN CHANNEL 32). IN THE EVENT THAT CHANNEL 32 BITS
# DIFFER FROM `PVALVEST', THE RECORD OF ACTIONS TAKEN BY THIS ROUTINE, THE APPROPRIATE BITS IN `CH5MASK' &
# `CH6MASK', USED BY THE DAP JET-SELECTION LOGIC, ARE UPDATED, AS IS `PVALVEST'. TO SPEED UP & SHORTEN THE
# DIFFER FROM 'PVALVEST', THE RECORD OF ACTIONS TAKEN BY THIS ROUTINE, THE APPROPRIATE BITS IN 'CH5MASK' &
# 'CH6MASK', USED BY THE DAP JET-SELECTION LOGIC, ARE UPDATED, AS IS 'PVALVEST'. TO SPEED UP & SHORTEN THE
# ROUTINE, NO MORE THAN ONE CHANGE IS ACCEPTED PER ENTRY. THE HIGHEST-NUMBERED BIT IN CHANNEL 32 WHICH REQUIRES
# ACTION IS THE ONE PROCESSED.
#
# THE CODING IN THE FAILURE MONITOR HAS BEEN WRITTEN SO AS TO HAVE ALMOST COMPLETE RESTART PROTECTION. FOR
# EXAMPLE, NO ASSUMPTION IS MADE WHEN SETTING A `CH5MASK' BIT TO 1 THAT THE PREVIOUS STATE IS 0, ALTHOUGH IT OF
# EXAMPLE, NO ASSUMPTION IS MADE WHEN SETTING A 'CH5MASK' BIT TO 1 THAT THE PREVIOUS STATE IS 0, ALTHOUGH IT OF
# COURSE SHOULD BE. ONE CASE WHICH MAY BE SEEN TO EVADE PROTECTION IS THE OCCURRENCE OF A RESTART AFTER UPDATING
# ONE OR BOTH DAP MASK-WORDS BUT BEFORE UPDATING `PVALVEST', COUPLED WITH A CHANGE IN THE VALVE-BIT BACK TO ITS
# ONE OR BOTH DAP MASK-WORDS BUT BEFORE UPDATING 'PVALVEST', COUPLED WITH A CHANGE IN THE VALVE-BIT BACK TO ITS
# FORMER STATE. THE CONSEQUENCE OF THIS IS THAT THE NEXT ENTRY WOULD NOT SEE THE CHANGE INCOMPLETELY INCORP-
# ORATED BY THE LAST PASS (BECAUSE IT WENT AWAY AT JUST THE RIGHT TIME), BUT THE DAP MASK-WORDS WILL BE INCORRECT.
# THIS COMBINATION OF EVENTS SEEMS QUITE REMOTE, BUT NOT IMPOSSIBLE UNLESS THE CREW OPERATES THE SWITCHES AT HALF-
@ -52,22 +52,21 @@
#
# CALLING SEQUENCE:
#
# TCF RCSMONIT # (IN INTERRUPT MODE, EVERY 480 MS.)
# TCF RCSMONIT (IN INTERRUPT MODE, EVERY 480 MS.)
#
# EXIT: TCF RCSMONEX (ALL PATHS EXIT VIA SUCH AN INSTRUCTION)
RCSMONEX EQUALS RESUME
# ERASABLE INITIALIZATION REQUIRED:
#
# VIA FRESH START: PVALVEST = +0 (ALL JETS ENABLED)
# CH5MASK,CH6MASK = +0 (ALL JETS OK)
# CH5MASK, CH6MASK = +0 (ALL JETS OK)
#
# OUTPUT: CH5MASK & CH6MASK UPDATED (1'S WHERE JETS NOT TO BE USED, IN CHANNEL 5 & 6 FORMAT)
# PVALTEST UPDATED (1'S WHEN VALVE CLOSURES HAVE BEEN TRANSLATED INTO CH5MASK & CH6MASK; CHAN 32 FORMAT)
# PVALTEST UPDATED (1.5 WHEN VALVE CLOSURES HAVE BEEN TRANSLATED INTO CH5MASK & CH6MASK; CHAN 32 FORMAT)
# JOB TO DO 1/ACCS.
#
# DEBRIS: A, L, AND Q AND DEBRIS OF NOVAC.
# DEBRIS: A, L, Q AND DEBRIS OF NOVAC.
#
# SUBROUTINE CALLED: NOVAC.
@ -87,10 +86,10 @@ RCSMON CS ZERO
MASK LOW8 # KEEP JET-FAIL BITS ONLY.
TS Q
CS PVALVEST # _ _
CS PVALVEST # - -
MASK Q # FORM PC + PC.
TS L # (P = PREVIOUS ISOLATION VALVE STATE,
CS Q # C = CURRENT VALVE STATE (CH32)).
CS Q # C = CURRENT VALVE STATE (CH 32)).
MASK PVALVEST
ADS L # RESULT NZ INDICATES ACTION REQUIRED.
@ -98,16 +97,16 @@ RCSMON CS ZERO
BZF RCSMONEX # QUIT IF NO ACTION REQUIRED.
EXTEND
MP BIT7 # MOVE BITS 8-1 OF A TO 14-7 OF L.
MP BIT7 # MOVE BITS 8 - 1 OF A TO 14 - 7 OF L.
XCH L # ZERO TO L IN THE PROCESS.
-3 INCR L
DOUBLE # BOUND TO GET OVERFLOW IN THIS LOOP,
DOUBLE # BOUND TO GET OVERFLOW IN THIS LOOP.
OVSK # SINCE WE ASSURED INITIAL NZ IN A.
TCF -3
INDEX L
CA BIT8 -1 # SAVE THE RELEVANT BIT (8-1).
CA BIT8 -1 # SAVE THE RELEVANT BIT (8 - 1).
TS Q
MASK PVALVEST # LOOK AT PREVIOUS VALVE STATE BIT.
CCS A
@ -121,7 +120,7 @@ RCSMON CS ZERO
CS CH6MASK
INDEX L
MASK 6FAILTAB
ADS CH6MASK # SET INGIBIT BIT FOR CHANNEL 6 JET
ADS CH6MASK # SET INGIBIT BIT FOR CHANNEL 6 JET.
CA Q
ADS PVALVEST # RECORD ACTION TAKEN.
@ -150,6 +149,7 @@ VOPENED INDEX L # A VALVE HAS JUST BEEN OPENED.
TCF RCSMONEX # EXIT.
5FAILTAB EQUALS -1 # CH 5 JET BIT CORRESPONDING TO CH 32 BIT:
OCT 00040 # 8
OCT 00020 # 7