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Reorganized files to separate Luminary099 source code from Comanche055 source code

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Clifford Richardson
2016-07-10 16:53:06 -07:00
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# Copyright: Public domain.
# Filename: WAITLIST.agc
# Purpose: Part of the source code for Colossus 2A, AKA Comanche 055.
# It is part of the source code for the Command Module's (CM)
# Apollo Guidance Computer (AGC), for Apollo 11.
# Assembler: yaYUL
# Contact: Ron Burkey <info@sandroid.org>.
# Website: www.ibiblio.org/apollo.
# Pages: 1221-1235
# Mod history: 2009-05-14 RSB Adapted from the Colossus249/ file of the
# same name, using Comanche055 page images.
#
# This source code has been transcribed or otherwise adapted from digitized
# images of a hardcopy from the MIT Museum. The digitization was performed
# by Paul Fjeld, and arranged for by Deborah Douglas of the Museum. Many
# thanks to both. The images (with suitable reduction in storage size and
# consequent reduction in image quality as well) are available online at
# www.ibiblio.org/apollo. If for some reason you find that the images are
# illegible, contact me at info@sandroid.org about getting access to the
# (much) higher-quality images which Paul actually created.
#
# Notations on the hardcopy document read, in part:
#
# Assemble revision 055 of AGC program Comanche by NASA
# 2021113-051. 10:28 APR. 1, 1969
#
# This AGC program shall also be referred to as
# Colossus 2A
# Page 1221
# PROGRAM DESCRIPTION DATE -- 10 OCTOBER 1966
# MOD NO -- 2 LOG SECTION -- WAITLIST
# MOD BY -- MILLER (DTMAX INCREASED TO 162.5 SEC) ASSEMBLY -- SUNBURST REV 5
# MOD 3 BY KERNAN (INHINT INSERTED AT WAITLIST) 2/28/68 SKIPPER REV 4
# MOD 4 BY KERNAN (TWIDDLE IN 54) 3/28/68 SKIPPER REV 13.
#
# FUNCTIONAL DESCRIPTION --
# PART OF A SECTION OF PROGRAMS -- WAITLIST, TASKOVER, T3RUPT, USED TO CALL A PROGRAM (CALLED A TASK),
# WHICH IS TO BEGIN IN C(A) CENTISECONDS. WAITLIST UPDATES TIME3, LST1, AND LST2. THE MEANING OF THESE LISTS
# FOLLOW.
#
# C(TIME3) = 16384 -(T1-T) CENTISECONDS, (T=PRESENT TIME, T1-TIME FOR TASK1)
#
# C(LST1) = -(T2-T1)+1
# C(LST1 +1) = -(T3-T2)+1
# C(LST1 +2) = -(T4-T3)+1
# ...
# C(LST1 +6) = -(T8-T7)+1
# C(LST1 +7) = -(T9-T8)+1
#
# C(LST2) = 2CADR OF TASK1
# C(LST2 +2) = 2CADR OF TASK2
# ...
# C(LST2 +14) = 2CADR OF TASK8
# C(LST2 +16) = 2CADR OF TASK9
#
# WARNINGS --
# 1) 1 <= C(A) <= 16250D (1 CENTISCOND TO 162.5 SEC)
# 2) 9 TASKS MAXIMUM
# 3) TASKS CALLED UNDER INTERRUPT INHIBITED
# 4) TASKS END BY TC TASKOVER
#
# CALLING SEQUENCE --
# L-1 CA DELTAT (TIME IN CENTISECONDS TO TASK START)
# L TC WAITLIST
# L+1 2CADR DESIRED TASK
# L+2 (MINOR OF 2CADR)
# L+3 RELINT (RETURNS HERE)
#
# TWIDDLE --
# TWIDDLE IS FOR USE WHEN THE TASK BEING SET UP IS IN THE SAME EBANK AND FBANK AS THE USER. IN
# SUCH CASES, IT IMPROVES UPON WAITLIST BY ELIMINATING THE NEED FOR THE BBCON HALF OF THE 2CADR,
# Page 1222
# SAVING A WORD. TWIDDLE IS LIKE WAITLIST IN EVERY RESPECT EXCEPT CALLING SEQUENCE, TO WIT,
# L-1 CA DELTAT
# L TC TWIDDLE
# L+1 ADRES DESIRED TASK
# L+2 RELINT (RETURNS HERE)
#
# NORMAL EXIT MODES --
# AT L+3 OF CALLING SEQUENCE.
#
# ALARM OR ABORT EXIT MODES --
# TC ABORT
# OCT 1203 (WAITLIST OVERFLOW -- TOO MANY TASKS)
#
# ERASABLE INITIALIZATION REQUIRED --
# ACCOMPLISHED BY FRESH START -- LST2, ..., LST2 +16 = ENDTASK
# LST1, ..., LST1 +7 = NEG1/2
#
# OUTPUT --
# LST1 AND LST2 UPDATED WITH NEW TASK AND ASSOCIATED TIME.
#
# DEBRIS --
# CENTRALS -- A,Q,L
# OTHER -- WAITEXIT, WAITADR, WAITTEMP, WAITBANK
#
# DETAILED ANALYSIS OF TIMING --
# CONTROL WILL NOT BE RETURNED TO THE SPECIFIED ADDRESS (2CADR) IN EXACTLY DELTA T CENTISECONDS.
# THE APPROXIMATE TIME MAY BE CALCULATED AS FOLLOWS:
# LET T0 = THE TIME OF THE TC WAITLIST
# LET TS = T0 +147U + COUNTER INCREMENTS (SET UP TIME)
# LET X = TS -(100TS)/100 (VARIANCE FROM COUNTERS)
# LET Y = LENGTH OF TIME OF INHIBIT INTERRUPT AFTER T3RUPT
# LET Z = LENGTH OF TIME TO PROCESS TASKS WHICH ARE DUE THIS T3RUPT BUT DISPATCHED EARLIER.
# (Z=0, USUALLY).
# LET DELTD = THE ACTUAL TIME TAKEN TO GIVE CONTROL TO 2CADR
# THEN DELTD = TS+DELTA T -X +Y +Z +1.05MS* +COUNTERS*
# *THE TIME TAKEN BY WAITLIST ITSELF AND THE COUNTER TICKING DURING THIS WAITLIST TIME.
# IN SHORT, THE ACTUAL TIME TO RETURN CONTROL TO A 2CADR IS AUGMENTED BY THE TIME TO SET UP THE TASK'S
# INTERRUPT, ALL COUNTERS TICKING, THE T3RUPT PROCESSING TIME, THE WAITLIST PROCESSING TIME AND THE POSSIBILITY
# OF OTHER TASKS INHIBITING THE INTERRUPT.
BLOCK 02
# Page 1223
EBANK= LST1 # TASK LISTS IN SWITCHED E BANK.
COUNT 02/WAIT
TWIDDLE INHINT
TS L # SAVE DELAY TIME IN L
CA POSMAX
ADS Q # CREATING OVERFLOW AND Q-1 IN Q
CA BBANK
EXTEND
ROR SUPERBNK
XCH L
WAITLIST INHINT
EXTEND
BZMF WATLST0-
XCH Q SAVE DELTA T IN Q AND RETURN IN
TS WAITEXIT WAITEXIT.
EXTEND
INDEX WAITEXIT # IF TWIDDLING, THE TS SKIPS TO HERE
DCA 0 # PICK UP 2CADR OF TASK.
-1 TS WAITADR # BBCON WILL REMAIN IN L
DLY2 CAF WAITBB # ENTRY FROM FIXDELAY AND VARDELAY.
XCH BBANK
TCF WAIT2
WATLST0- TC P00DOO
OCT 1204 # WAITLIST CALL WITH ZERO OR NEG DT
# RETURN TO CALLER AFTER TASK INSERTION:
LVWTLIST DXCH WAITEXIT
AD TWO
DTCB
EBANK= LST1
WAITBB BBCON WAIT2
# RETURN TO CALLER +2 AFTER WAITING DT SPECIFIED AT CALLER +1.
FIXDELAY INDEX Q # BOTH ROUTINES MUST BE CALLED UNDER
# Was CAF --- RSB 2004.
CA 0 # WAITLIST CONTROL AND TERMINATE THE TASK
INCR Q # IN WHICH THEY WERE CALLED.
# RETURN TO CALLER +1 AFTER WAITING THE DT AS ARRIVING IN A.
VARDELAY XCH Q # DT TO Q. TASK ADRES TO WAITADR.
TS WAITADR
CA BBANK # BBANK IS SAVED DURING DELAY.
EXTEND
# Page 1224
ROR SUPERBNK # ADD SBANK TO BBCON.
TS L
CAF DELAYEX
TS WAITEXIT # GO TO TASKOVER AFTER TASK ENTRY.
TCF DLY2
DELAYEX TCF TASKOVER -2 # RETURNS TO TASKOVER.
# Page 1225
# ENDTASK MUST ENTERED IN FIXED-FIXED SO IT IS DISTINGUISHABLE BY ITS ADRES ALONE.
EBANK= LST1
ENDTASK -2CADR SVCT3
SVCT3 CCS FLAGWRD2 # DRIFT FLAG
TCF TASKOVER
TCF TASKOVER
TCF +1
CCS IMUCADR # DON'T DO NBDONLY IF SOMEONE ELSE IS IN
TCF SVCT3X
TCF +3
TCF SVCT3X
TCF SVCT3X
+3 CAF PRIO35 # COMPENSATE FOR NBD COEFFICIENTS ONLY.
TC NOVAC # ENABLE EVERY 81.93 SECONDS
EBANK= NBDX
2CADR NBDONLY
TCF TASKOVER
SETLOC FFTAG6
BANK
SVCT3X TC FIXDELAY # DELAY MAX OF 2 TIMES FOR IMU ZERO
DEC 500
TC SVCT3
# Page 1226
# BEGIN TASK INSERTION.
BANK 01
COUNT 01/WAIT
WAIT2 TS WAITBANK # BBANK OF CALLING PROGRAM.
CS TIME3
AD BIT8 # BIT 8 = OCT 200
CCS A # TEST 200 - C(TIME3). IF POSITIVE,
# IT MEANS THAT TIME3 OVERFLOW HAS OCCURRED PRIOR TO CS TIME3 AND THAT
# C(TIME3) = T - T1, INSTEAD OF 1.0 - (T1 - T). THE FOLLOWING FOUR
# ORDERS SET C(A) = TD - T1 + 1 IN EITHER CASE.
AD OCT40001 # OVERFLOW HAS OCCURRED. SET C(A) =
CS A # T - T1 + 1.0 - 201
# NORMAL CASE (C(A) NNZ) YIELDS SAME C(A): -( -(1.0-(T1-T)) + 200) - 1
AD OCT40201
AD Q # RESULT = TD - T1 + 1.
CCS A # TEST TD - T1 +1.
AD LST1 # IF TD - T1 POS, GO TO WTLST5 WITH
TCF WTLST5 # C(A) = (TD - T1) + C(LST1) = TD-T2+1
NOOP
CS Q
# NOTE THAT THIS PROGRAM SECTION IS NEVER ENTERED WHEN T-T1 G/E -1,
# SINCE TD-T1+1 = (TD-T) + (T-T1+1), AND DELTA T = TD-T G/E +1. (G/E
# SYMBOL MEANS GREATER THAN OR EQUAL TO). THUS THERE NEED BE NO CON-
# CERN OVER A PREVIOUS OR IMMINENT OVERFLOW OF TIME3 HERE.
AD POS1/2 # WHEN TD IS NEXT, FORM QUANTITY
AD POS1/2 # 1.0 - DELTA T = 1.0 - (TD - T)
XCH TIME3
AD NEGMAX
AD Q # 1.0 - DELTAT T NOW COMPLETE.
EXTEND # ZERO INDEX Q.
QXCH 7 # (ZQ)
# Page 1227
WTLST4 XCH LST1
XCH LST1 +1
XCH LST1 +2
XCH LST1 +3
XCH LST1 +4
XCH LST1 +5
XCH LST1 +6
XCH LST1 +7
CA WAITADR # (MINOR PART OF TASK CADR HAS BEEN IN L.)
INDEX Q
TCF +1
DXCH LST2
DXCH LST2 +2
DXCH LST2 +4
DXCH LST2 +6
DXCH LST2 +8D
DXCH LST2 +10D # AT END, CHECK THAT C(LST2 +10) IS STD
DXCH LST2 +12D
DXCH LST2 +14D
DXCH LST2 +16D
AD ENDTASK # END ITEM, AS CHECK FOR EXCEEDING
# THE LENGTH OF THE LIST.
EXTEND # DUMMY TASK ADRES SHOULD BE IN FIXED-
BZF LVWTLIST # FIXED SO ITS ADRES ALONE DISTINGUISHES
TCF WTABORT # IT.
# Page 1228
WTLST5 CCS A # TEST TD - T2 + 1
AD LST1 +1
TCF +4
AD ONE
TC WTLST2
OCT 1
+4 CCS A # TEST TD - T3 + 1
AD LST1 +2
TCF +4
AD ONE
TC WTLST2
OCT 2
+4 CCS A # TEST TD - T4 + 1
AD LST1 +3
TCF +4
AD ONE
TC WTLST2
OCT 3
+4 CCS A # TEST TD - T5 + 1
AD LST1 +4
TCF +4
AD ONE
TC WTLST2
OCT 4
+4 CCS A # TEST TD - T6 + 1
AD LST1 +5
TCF +4
AD ONE
TC WTLST2
OCT 5
+4 CCS A # TEST TD - T7 + 1
AD LST1 +6
TCF +4
AD ONE
TC WTLST2
OCT 6
# Page 1229
+4 CCS A
AD LST1 +7
TCF +4
AD ONE
TC WTLST2
OCT 7
+4 CCS A
WTABORT TC BAILOUT # NO ROOM IN THE INN
OCT 1203
AD ONE
TC WTLST2
OCT 10
OCT40201 OCT 40201
# Page 1230
# THE ENTRY TC WTLST2 JUST PRECEDING OCT N IS FOR T LE TD LE T -1.
# N N+1
#
# (LE MEANS LESS THAN OR EQUAL TO). AT ENTRY, C(A) = -(TD - T + 1)
# N+1
#
# THE LST1 ENTRY-(T -T +1) IS TO BE REPLACED BY -(TD - T + 1), AND
# N+1 N N
#
# THE ENTRY-(T - TD + 1) IS TO BE INSERTED IMMEDIATELY FOLLOWING.
# N+1
WTLST2 TS WAITTEMP # C(A) = -(TD - T + 1)
INDEX Q
# Was CAF --- RSB 2004.
CA 0
TS Q # INDEX VALUE INTO Q.
CAF ONE
AD WAITTEMP
INDEX Q # C(A) = -(TD - T ) + 1.
ADS LST1 -1 # N
CS WAITTEMP
INDEX Q
TCF WTLST4
# Page 1231
# ENTERS HERE ON T3 RUPT TO DISPATCH WAITLISTED TASK.
T3RUPT EXTEND
ROR SUPERBNK # READ CURRENT SUPERBANK VALUE AND
TS BANKRUPT # SAVE WITH E AND F BANK VALUES.
EXTEND
QXCH QRUPT
T3RUPT2 CAF NEG1/2 # DISPATCH WAITLIST TASK.
XCH LST1 +7
XCH LST1 +6
XCH LST1 +5
XCH LST1 +4 # 1. MOVE UP LST1 CONTENTS, ENTERING
XCH LST1 +3 # A VALUE OF 1/2 +1 AT THE BOTTOM
XCH LST1 +2 # FOR T6-T5, CORRESPONDING TO THE
XCH LST1 +1 # INTERVAL 81.91 SEC FOR ENDTASK.
XCH LST1
AD POSMAX # 2. SET T3 = 1.0 - T2 - T USING LIST 1.
ADS TIME3 # SO T3 WON'T TICK DURING UPDATE.
TS RUPTAGN
CS ZERO
TS RUPTAGN # SETS RUPTAGN TO +1 ON OVERFLOW.
EXTEND # DISPATCH TASK.
DCS ENDTASK
DXCH LST2 +16D
DXCH LST2 +14D
DXCH LST2 +12D
DXCH LST2 +10D
DXCH LST2 +8D
DXCH LST2 +6
DXCH LST2 +4
DXCH LST2 +2
DXCH LST2
XCH L
EXTEND
WRITE SUPERBNK # SET SUPERBANK FROM BBCON OF 2CADR
XCH L # RESTORE TO L FOR DXCH Z.
DTCB
# Page 1232
# RETURN, AFTER EXECUTION OF T3 OVERFLOW TASK:
BLOCK 02
COUNT 02/WAIT
TASKOVER CCS RUPTAGN # IF +1 RETURN TO T3RUPT, IF -0 RESUME.
CAF WAITBB
TS BBANK
TCF T3RUPT2 # DISPATCH NEXT TASK IF IT WAS DUE.
CA BANKRUPT
EXTEND
WRITE SUPERBNK # RESTORE SUPERBANK BEFORE RESUME IS DONE
RESUME EXTEND
QXCH QRUPT
NOQRSM CA BANKRUPT
XCH BBANK
NOQBRSM DXCH ARUPT
RELINT
RESUME
# Page 1233
# LONGCALL
# PROGRAM DESCRIPTION DATE -- 17 MARCH 1967
# PROGRAM WRITTEN BY W.H.VANDEVER LOG SECTION WAITLIST
# MOD BY -- R. MELANSON TO ADD DOCUMENTATION ASSEMBLY SUNDISK REV. 100
#
# FUNCTIONAL DESCRIPTION --
# LONGCALL IS CALLED WITH THE DELTA TIME ARRIVING IN A,L SCALED AS TIME2,TIME1 WITH THE 2CADR OF THE TASK
# IMMEDIATELY FOLLOWING THE TC LONGCALL. FOR EXAMPLE, IT MIGHT BE DONE AS FOLLOWS WHERE TIMELOC IS THE NAME OF
# A DP REGISTER CONTAINING A DELTA TIME AND WHERE TASKTODO IS THE NAME OF THE LOCATION AT WHICH LONGCALL IS TO
# START.
#
# CALLING SEQUENCE --
# EXTEND
# DCA TIMELOC
# TC LONGCALL
# 2CADR TASKTODO
#
# NORMAL EXIT MODE --
# 1) TC WAITLIST
# 2) DTCB (TC L+3 OF CALLING ROUTINE 1ST PASS THRU LONGCYCL)
# 3) DTCB (TO TASKOVER ON SUBSEQUENT PASSES THRU LONGCYCL)
#
# ALARM OR ABORT EXIT MODE --
# NONE
#
# OUTPUT --
# LONGTIME AND LONGTIME+1 = DELTA TIME
# LONGEXIT AND LONGEXIT+1 = RETURN 2CADR
# LONGCADR AND LONGCADR+1 = TASK 2CADR
# A = SINGLE PRECISION TIME FOR WAITLIST
#
# ERASABLE INITIALIZATION --
# A = MOST SIGNIFICANT PART OF DELTA TIME
# L = LEAST SIGNIFICANT PART OF DELTA TIME
# Q = ADDRESS OF 2CADR TASK VALUE
#
# DEBRIS --
# A,Q,L
# LONGCADR AND LONGCADR+1
# LONGEXIT AND LONGEXIT+1
# LONGTIME AND LONGTIME+1
#
# *** THE FOLLOWING IS TO BE IN FIXED-FIXED AND UNSWITCHED ERASIBLE **
BLOCK 02
EBANK= LST1
LONGCALL DXCH LONGTIME # OBTAIN THE DELTA TIME
EXTEND # OBTAIN THE 2CADR
# Page 1234
NDX Q
DCA 0
DXCH LONGCADR
EXTEND # NO GO TO THE APPROPRIATE SWITCHED BANK
DCA LGCL2CDR # FOR THE REST OF LONGCALL
DTCB
EBANK= LST1
LGCL2CDR 2CADR LNGCALL2
# *** THE FOLLOWING MAY BE IN A SWITCHED BANK, INCLUDING ITS ERASABLE ***
BANK 01
COUNT 01/WAIT
LNGCALL2 LXCH LONGEXIT +1 # SAVE THE CORRECT BB FOR RETURN
CA TWO # OBTAIN THE RETURN ADDRESS
ADS Q
TS LONGEXIT
# *** WAITLIST TASK LONGCYCL ***
LONGCYCL EXTEND # CAN WE SUCCESFULLY TAKE ABOUT 1.25
DCS DPBIT14 # MINUTES OFF OF LONGTIME
DAS LONGTIME
CCS LONGTIME +1 # THE REASONING BEHIND THIS PART IS
TCF MUCHTIME # INVOLVED, TAKING INTO ACCOUNT THAT THE
# WORDS MAY NOT BE SIGNED CORRECTED (DP
# BASIC INSTRUCTIONS
# DO NOT SIGN CORRECT) AND THAT WE SUBTRAC-
# TED BIT14 (1 OVER HALF THE POS. VALUE
# REPRESENTABLE IN SINGLE WORD)
NOOP # CAN'T GET HERE *************
TCF +1
CCS LONGTIME
TCF MUCHTIME
DPBIT14 OCT 00000
OCT 20000
# LONGCALL
LASTTIME CA BIT14 # GET BACK THE CORRECT DELTA TFOR WAITLIST
ADS LONGTIME +1
TC WAITLIST
EBANK= LST1
2CADR GETCADR # THE ENTRY TO OUR LONGCADR
LONGRTRN CA TSKOVCDR # SET IT UP SO THAT ONLY THE FIRST EXIT IS
# Page 1235
DXCH LONGEXIT # TO THE CALLER OF LONGCALL
DTCB # THE REST ARE TO TASKOVER
MUCHTIME CA BIT14 # WE HAVE OVER OUR ABOUT 1.25 MINUTES
TC WAITLIST # SO SET UP FOR ANOTHER CYCLE THROUGH HERE
EBANK= LST1
2CADR LONGCYCL
TCF LONGRTRN # NOW EXIT PROPERLY
# *** WAITLIST TASK GETCADR ***
GETCADR DXCH LONGCADR # GET THE LONGCALL THAT WE WISHED TO START
DTCB # AND TRANSFER CONTROL TO IT
TSKOVCDR GENADR TASKOVER