Apollo-11/Comanche055/TVCSTROKETEST.agc

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# Copyright: Public domain.
# Filename: TVCSTROKETEST.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: 979-983
# Mod history: 2009-05-13 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
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# illegible, contact me at info@sandroid.org about getting access to the
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# (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
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# 2021113-051. 10:28 APR. 1, 1969
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#
# This AGC program shall also be referred to as
# Colossus 2A
# Page 979
# NAME STROKE TEST PACKAGE (INCLUDING INITIALIZATION PACKAGE)
# LOG SECTION...TVCSTROKETEST SUBROUTINE...DAPCSM
# MODIFIED BY SCHLUNDT 21 OCTOBER 1968
#
# FUNCTIONAL DESCRIPTION....
# STROKE TEST PACKAGE GENERATES A WAVEFORM DESIGNED TO EXCITE BENDING
# STRKTSTI (STROKE TEST INITIALIZATION) IS CALLED AS A JOB BY VB68.
# IT INITIALIZES ALL ERASABLES REQD FOR A STROKE TEST, AND
# THEN TESTS FOR CSM/LM (BIT 13 OF DAPDATR1). IF CSM/LM,
# IN EITHER HIGH OR LOW-BANDWIDTH MODE, THE TEST IS STARTED
# IMMEDIATELY. IF NOT CSM/LM, PROGRAM EXITS WITH NO ACTION.
# HACK (STROKE TEST) GENERATES THE WAVEFORM BY DUMPING PULSE BURSTS
# OF PROPER SIGN AND IN PROPER SEQUENCE DIRECTLY INTO
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# TVCPITCH, WORKING IN CONJUNCTION WITH BOTH PITCH AND YAW
# TVC DAPS, WITH INTERMEDIATE WAITLIST CALLS. NOTE, HOWEVER
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# THAT THE STROKE TEST IS PERFORMED ONLY IN THE PITCH AXIS.
# AN EXAMPLE WAVEFORM IS GIVEN BELOW, TO DEMONSTRATE STROKE-
# TEST PARAMETER SELECTION.
# RESTARTS CAUSE TEST TO BE TERMINATED. ANOTHER V68 REQD IF TEST
# IS TO BE RE-RUN.
# PULSE BURST SIZE IS PAD-LOADED (ESTROKER) SO THAT AMPLITUDE OF
# WAVEFORM CAN BE CHANGED. THERE ARE TEN PULSE BURSTS IN
# THE HALF-AMPLITUDE OF THE FIRST FREQUENCY SET IN THE
# STANDARD WAVEFORM. AMPLITUDE IS 10(ESTROKER)(1/42.15),
# NOMINALLY 50/42.15 = 1.185 DEG
#
# CALLING SEQUENCE....
# EXTENDED VERB 68 SETS UP STRKTSTI JOB
# PITCH AND YAW TVCDAPS, FINDING STROKER NON-ZERO, DO A ..TC HACK..
# AN INTERNALLY-GENERATED WAITLIST CALL ENTERS AT ..HACKWLST..
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#
# NORMAL EXIT MODES....
# TC BUNKER (..Q.. IF ENTRY FROM DAP, ..TCTSKOVR.. IF FROM WAITLIST) LIST
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#
# SUBROUTINES CALLED....
# WAITLIST
#
# ALARM OR ABORT EXIT MODES....
# NONE
#
# ERASABLE INITIALIZATION REQUIRED....
# ESTROKER (PAD-LOAD)
# STROKER, CADDY, REVS, CARD, N
#
# OUTPUT....
# STRKTSTI...INITIALIZATION FOR STROKE TEST
# HACK, HACKWLST...PULSE BURSTS INTO TVCPITCH VIA..ADS..
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# RESETS STROKER = +0 WHEN TEST COMPLETED
#
# DEBRIS....
# N = CADDY = +0, CARD = -0, REVS = -1
# BUNKER
# Page 980
#
# EXAMPLE STROKE TEST WAVE FORM, DEMONSTRATING PARAMETER SELECTION
# NOTE....THIS IS NOT THE OFFICIAL WAVEFORM....
#
# ** **
# ** **
# ** ** EXAMPLE WAVEFORM (EACH * REPRESENTS
# * * * * (85.41 ARCSEC OF ACTUATOR CMND)
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# * * * *
# * * * *
# * * * * ** ** ** ** **
# * * * * ** ** ** ** **
# * * * * ** ** ** ** **
# * * * * * * * * * * * * * * ** ** ** ** **
# * * * * * * * * * * * * * * ** ** ** ** **
# * * * * * * * * * * * * * * ** ** ** ** **
# ----------------------------------------------------------------------------------------------------
# * * * * * * * * * * * * * * ** ** ** ** **
# * * * * * * * * * * * * * * ** ** ** ** **
# * * * * * * * * * * * * * * ** ** ** ** **
# * * * * ** ** ** ** **
# * * * * ** ** ** ** **
# * * * * ** ** ** ** **
# * * * *
# * * * *
# * * * *
# ** **
# ** **
# ** **
#
# FOR THIS (UNOFFICIAL, EXAMPLE) WAVEFORM, THE REQUIRED PARAMETERS ARE AS FOLLOWS....
#
# FCARD = +3 (NUMBER OF SETS)
# ESTROKER = +3 (PULSE BURST SIZE, SC.AT 85.41 ARCSEC/BIT)
#
# SET1:
# FREVS = +3 (NUMBER REVERSALS MINUS 1)
# FCADDY = +4 (NUMBER OF PULSE BURSTS IN 1/2 AMPLITUDE)
# SET2:
# FCARD1 = +9 (NUMBER REVERSALS MINUS 1)
# FCARD4 = +2 (NUMBER OF PULSE BURSTS IN 1/2 AMPLITUDE)
# SET3:
# FCARD2 = +9 (NUMBER REVERSALS MINUS 1)
# FCARD5 = +1 (NUMBER OF PULSE BURSTS IN 1/2 AMPLITUDE)
# SET4:
# FCARD3 = +0 (NUMBER OF REVERSALS MINUS 1)
# FCARD6 = +0 (NUMBER OF PULSE BURSTS IN 1/2 AMPLUTUDE)
# Page 981
# STROKE TEST INITIALIZATION PACKAGE (AS A JOB, FROM VERB 68)
BANK 17
SETLOC DAPS2
BANK
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COUNT* $$/STRK
EBANK= CADDY
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STRKTSTI TCR TSTINIT # STROKE TEST INITIALIZATION PKG (CALLED
# AS A JOB BY VERB68)
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STRKCHK INHINT
CAE DAPDATR1 # CHECK FOR CSM/LM CONFIGURATION
MASK BIT14
EXTEND
BZF +3
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CAE ESTROKER # BEGIN ON NEXT DAP PASS (PITCH OR YAW)
TS STROKER # (STROKING DONE IN PITCH ONLY, HOWEVER)
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TCF ENDOFJOB
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TSTINIT CS FCADDY # NORMAL ENTRY FROM STRKTSTI
TS CADDY
TS N # NOTE SGN CHNG FCADDY(+) TO CADDY(-)
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CAF FREVS
TS REVS
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CS FCARD # NOTE SGN CHNG FCARD(+) TO CARD(-)
TS CARD
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TC Q # RETURN TO STRKTSTI+1 (OR CHKSTRK+2OR+4)
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# Page 982
# THE OFFICIAL STROKE TEST WAVEFORM (3 JAN, 1967) CONSISTS OF FOUR STROKE SETS, AS FOLLOWS....
#
# SET 1...10 BURSTS IN 1/2 AMP, 4 REVERSALS
# SET 2... 6 BURSTS IN 1/2 AMP, 6 REVERSALS
# SET 3... 5 BURSTS IN 1/2 AMP, 10 REVERSALS
# SET 4... 4 BURSTS IN 1/2 AMP, 14 REVERSALS
#
# THE PULSE BURST SIZE (ESTROKER) IS PAD-LOADED (5 BITS AS OF 3JAN,1967)
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# THE REMAINING WAVEFORM-GENERATING PARAMETERS ARE AS FOLLOWS....
FCADDY DEC 10 # NO. PULSE BURSTS IN 1/2 AMP, SET1..(+10)
FREVS DEC 3 # NO. REVERSALS MINUS 1, SET1........( 3)
FCARD DEC 4 # NO. STROKE SETS....................(+ 4)
FCARD1 DEC 5 # NO. REVERSALS MINUS 1, SET2........( 5)
FCARD2 DEC 9 # 3........( 9)
FCARD3 DEC 13 # 4........( 13)
FCARD4 DEC 6 # NO. PULSE BURSTS IN 1/2 AMP, SET2..(+ 6)
FCARD5 DEC 5 # SET3..(+ 5)
FCARD6 DEC 4 # SET4..(+ 4)
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20MS = BIT2
# STROKE TEST PACKAGE PROPER....
EBANK= BUNKER
HACK EXTEND # ENTRY (IN T5 RUPT) FROM TVCDAPS
QXCH BUNKER # SAVE Q FOR DAP RETURN
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CAF 20MS # 2DAPSX2(PASSES/DAP)X2(CS/PASS)=8CS=TVCDT
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TC WAITLIST
EBANK= BUNKER
2CADR HACKWLST
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TCF +3
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HACKWLST CAF TCTSKOVR # ENTRY FROM WAITLIST
TS BUNKER # BUNKER IS TC TASKOVER
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CA STROKER # STROKE
ADS TVCPITCH
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CAF BIT11 # RELEASE THE ERROR COUNTERS
EXTEND
WOR CHAN14
INCR CADDY # COUNT DOWN THE NO. BURSTS, THIS SLOPE
# Page 983
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CS CADDY
EXTEND
BZMF +2
TC BUNKER # EXIT, WHILE ON A SLOPE
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CCS REVS
TCF REVUP # POSITIVE REVS
TCF REVUP +4 # FINAL REVERSAL, THIS SET
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INCR CARD # NEGATIVE REVS SET LAST PASS, READY FOR
CS CARD # THE NEXT SET. CHECK IF NO MORE SETS
EXTEND
BZF STROKILL # ALL SETS COMPLETED
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INDEX CARD
CAF FCARD +4 # PICK UP NO. REVERSALS (-), NEXT SET
TS REVS # REINITIALIZE
INDEX CARD
CS FCARD +7 # PICK UP NO. BURSTS IN 1/2AMP, NEXT SET
TS N # REINITIALIZE
TS CADDY
TC BUNKER # EXIT, AT END OF SET
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STROKILL TS STROKER # RESET (TO +0) TO END TEST
TC BUNKER # EXIT, STROKE TEST FINIS
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REVUP TS REVS # ALL REVERSALS EXCEPT LAST OF SET
CA N
DOUBLE # 2 x 1/2AMP
TCF +4
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+4 CS ONE # FINAL REVERSAL, THIS SET
TS REVS # PREPARE TO BRANCH TO NEW BURST
CA N # JUST RETURN TO ZERO, FINAL SLOPE OF SET
TS CADDY # CADUP
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CS STROKER # CHANGE SIGN OF SLOPE
TS STROKER
TC BUNKER # EXIT AT A REVERSAL (SLOPE CHANGE)