https://github.com/virtualagc/virtualagc
Revision 078c79d8734a9ed2860303a7c1662004284fe853 authored by Ron Burkey on 07 August 2022, 15:04:04 UTC, committed by Ron Burkey on 07 August 2022, 15:04:04 UTC
assembly listings from yaASM and yaLEMAP. Added some debugging messages to 'make install'. Tweaked debugging messages that VirtualAGC embeds in 'simulate'. Verified buildability in Mint 21, 20, 19, 17, and verified buildability using clang in Mint 17.
1 parent 6bb1acc
Tip revision: 078c79d8734a9ed2860303a7c1662004284fe853 authored by Ron Burkey on 07 August 2022, 15:04:04 UTC
Fixed a potential string-overflow bug in yaASM. Removed timestamps from
Fixed a potential string-overflow bug in yaASM. Removed timestamps from
Tip revision: 078c79d
RTB_OP_CODES.agc
### FILE="Main.annotation"
## Copyright: Public domain.
## Filename: RTB_OP_CODES.agc
## Purpose: Part of the source code for Artemis (i.e., Colossus 3),
## build 072. This is for the Command Module's (CM)
## Apollo Guidance Computer (AGC), for
## Apollo 15-17.
## Assembler: yaYUL
## Contact: Jim Lawton <jim DOT lawton AT gmail DOT com>
## Website: www.ibiblio.org/apollo/index.html
## Page Scans: www.ibiblio.org/apollo/ScansForConversion/Artemis072/
## Mod history: 2009-08-17 JL Adapted from corresponding Comanche 055 file.
## 2009-09-29 JL Fixed file name in header section.
## 2010-02-20 RSB Un-##'d this header.
## 2017-02-08 RSB Proofed comment text by diff'ing vs Comanche 55
## and/or octopus/ProoferComments as most-appropriate.
## Page 1501
SETLOC RTBCODE1
BANK
EBANK= XNB
COUNT* $$/RTB
# LOAD TIME2, TIME1 INTO MPAC:
LOADTIME EXTEND
DCA TIME2
TCF SLOAD2
# CONVERT THE SINGLE PRECISION 2'S COMPLEMENT NUMBER ARRIVING IN MPAC (SCALED IN HALF-REVOLUTIONS) TO A
# DP 1'S COMPLEMENT NUMBER SCALED IN REVOLUTIONS.
CDULOGIC CCS MPAC
CAF ZERO
TCF +3
NOOP
CS HALF
TS MPAC +1
CAF ZERO
XCH MPAC
EXTEND
MP HALF
DAS MPAC
TCF DANZIG # MODE IS ALREADY AT DOUBLE-PRECISION
SETLOC RTBCODES
BANK
COUNT* $$/RTB
# READ THE PIPS INTO MPAC WITHOUT CHANGING THEM:
READPIPS INHINT
CA PIPAX
TS MPAC
CA PIPAY
TS MPAC +3
CA PIPAZ
RELINT
TS MPAC +5
CAF ZERO
TS MPAC +1
TS MPAC +4
TS MPAC +6
VECMODE TCF VMODE
## Page 1502
# FORCE TP SIGN AGREEMENT IN MPAC:
SGNAGREE TC TPAGREE
TCF DANZIG
# CONVERT THE DP 1'S COMPLEMENT ANGLE SCALED IN REVOLUTIONS TO A SINGLE PRECISION 2'S COMPLEMENT ANGLE
# SCALED IN HALF-REVOLUTIONS.
1STO2S TC 1TO2SUB
CAF ZERO
TS MPAC +1
TCF NEWMODE
# DO 1STO2S ON A VECTOR OF ANGLES:
V1STO2S TC 1TO2SUB # ANSWER ARRIVES IN A AND MPAC.
DXCH MPAC +5
DXCH MPAC
TC 1TO2SUB
TS MPAC +2
DXCH MPAC +3
DXCH MPAC
TC 1TO2SUB
TS MPAC +1
CA MPAC +5
TS MPAC
TPMODE CAF ONE # MODE IS TP.
TCF NEWMODE
# SUBROUTINE TO DO DOUBLING AND 1'S TO 2'S CONVERSION:
1TO2SUB DXCH MPAC # FINAL MPAC +1 UNSPECIFIED.
DDOUBL
CCS A
AD ONE
TCF +2
COM # THIS WAS REVERSE OF MSU.
TS MPAC # AND SKIP ON OVERFLOW.
TC Q
INDEX A # OVERFLOW UNCORRECT AND IN MSU.
CAF LIMITS
ADS MPAC
TC Q
## Page 1503
# THE FOLLOWING ROUTINE INCREMENTS IN 2S COMPLEMENT THE REGISTER WHOSE ADDRESS IS IN BUF BY THE 1S COMPL.
# QUANTITY FOUND IN TEM2. THIS MAY BE USED TO INCREMENT DESIRED IMU AND OPTICS CDU ANGLES OR ANY OTHER 2S COMPL.
# (+0 UNEQUAL TO -0) QUANTITY. MAY BE CALLED BY BANKCALL/SWCALL.
CDUINC TS TEM2 # 1S COMPL.QUANT. ARRIVES IN ACC. STORE IT
INDEX BUF
CCS 0 # CHANGE 2S COMPL. ANGLE(IN BUF)INTO 1S
AD ONE
TCF +4
AD ONE
AD ONE # OVERFLOW HERE IF 2S COMPL. IS 180 DEG.
COM
AD TEM2 # SULT MOVES FROM 2ND TO 3D QUAD. (OR BACK)
CCS A # BACK TO 2S COMPL.
AD ONE
TCF +2
COM
TS TEM2 # STORE 14BIT QUANTITY WITH PRESENT SIGN
TCF +4
INDEX A # SIGN.
CAF LIMITS # FIX IT, BY ADDING IN 37777 OR 40000
AD TEM2
INDEX BUF
TS 0 # STORE NEW ANGLE IN 2S COMPLEMENT.
TC Q
## Page 1504
# RTB TO TORQUE GYROS, EXCEPT FOR THE CALL TO IMUSTALL. ECADR OF COMMANDS ARRIVES IN X1.
PULSEIMU INDEX FIXLOC # ADDRESS OF GYRO COMMANDS SHOULD BE IN X1
CA X1
TC BANKCALL
CADR IMUPULSE
TCF DANZIG
## Page 1505
# EACH ROUTINE TAKES A 3X3 MATRIX STORED IN DOUBLE PRECISION IN A FIXED AREA OF ERASABLE MEMORY AND REPLACES IT
# WITH THE TRANSPOSE MATRIX. TRANSP1 USES LOCATIONS XNB+0,+1 THROUGH XNB+16D, 17D AND TRANSP2 USES LOCATIONS
# XNB1+0,+1 THROUGH XNB1+16D, 17D. EACH MATRIX IS STORED BY ROWS.
XNBEB ECADR XNB
XNB1EB ECADR XNB1
EBANK= XNB
TRANSP1 CAF XNBEB
TS EBANK
DXCH XNB +2
DXCH XNB +6
DXCH XNB +2
DXCH XNB +4
DXCH XNB +12D
DXCH XNB +4
DXCH XNB +10D
DXCH XNB +14D
DXCH XNB +10D
TCF DANZIG
EBANK= XNB1
TRANSP2 CAF XNB1EB
TS EBANK
DXCH XNB1 +2
DXCH XNB1 +6
DXCH XNB1 +2
DXCH XNB1 +4
DXCH XNB1 +12D
DXCH XNB1 +4
DXCH XNB1 +10D
DXCH XNB1 +14D
DXCH XNB1 +10D
TCF DANZIG
## Page 1506
# THE SUBROUTINE SIGNMPAC SETS C(MPAC, MPAC +1) TO SIGN(MPAC).
# FOR THIS, ONLY THE CONTENTS OF MPAC ARE EXAMINED. ALSO +0 YIELDS POSMAX AND -0 YIELDS NEGMAX.
#
# ENTRY MAY BE BY EITHER OF THE FOLLOWING:
#
# 1. LIMIT THE SIZE OF MPAC ON INTERPRETIVE OVERFLOW:
# ENTRY: BOVB
# SIGNMPAC
# 2. GENERATE IN MPAC THE SIGNUM FUNCTION OF MPAC:
# ENTRY: RTB
# SIGNMPAC
#
# IN EITHER CASE, RETURN IS TO THE NEXT INTERPRETIVE INSTRUCTION IN THE CALLING SEQUENCE.
SIGNMPAC EXTEND
DCA DPOSMAX
DXCH MPAC
CCS A
DPMODE CAF ZERO # SETS MPAC +2 TO ZERO IN THE PROCESS
TCF SLOAD2 +2
TCF +1
EXTEND
DCS DPOSMAX
TCF SLOAD2
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