DAP_INTERFACE_SUBROUTINES.agc
### FILE="Main.annotation"
## Copyright: Public domain.
## Filename: DAP_INTERFACE_SUBROUTINES.agc
## Purpose: A section of Luminary revision 210.
## It is part of the source code for the Lunar Module's (LM)
## Apollo Guidance Computer (AGC) for Apollo 15-17.
## This file is intended to be a faithful transcription, except
## that the code format has been changed to conform to the
## requirements of the yaYUL assembler rather than the
## original YUL assembler.
## Reference: pp. 1403-1406
## Assembler: yaYUL
## Contact: Ron Burkey <info@sandroid.org>.
## Website: www.ibiblio.org/apollo/index.html
## Mod history: 2016-11-17 JL Created from Luminary131 version.
## 2016-11-25 TB Transcribed
## 2016-12-26 RSB Comment-text proofed using ProoferComments
## and corrected errors found.
## 2017-03-15 RSB Comment-text fixes identified in 5-way
## side-by-side diff of Luminary 69/99/116/131/210.
## Page 1403
BANK 20
SETLOC DAPS3
BANK
EBANK= CDUXD
COUNT* $$/DAPIF
# MOD 0 DATE 11/15/66 BY GEORGE W. CHERRY
# MOD 1 1/23/67 MODIFICATION BY PETER ADLER
# FUNCTIONAL DESCRIPTION
# HEREIN ARE A COLLECTION OF SUBROUTINES WHICH ALLOW MISSION CONTROL PROGRAMS TO CONTROL THE MODE
# AND INTERFACE WITH THE DAP.
# CALLING SEQUENCES
# IN INTERRUPT OR WITH INTERRUPT INHIBITED
# TC IBNKCALL
# FCADR ROUTINE
# IN A JOB WITHOUT INTERRUPT INHIBITED
# INHINT
# TC IBNKCALL
# FCADR ROUTINE
# RELINT
# OUTPUT
# SEE INDIVIDUAL ROUTINES BELOW
# DEBRIS
# A,L, AND SOMETIMES MDUETEMP ODE NOT IN PULSES MODE
## Page 1404
# SUBROUTINE NAMES:
# SETMAXDB, SETMINDB, RESTORDB, PFLITEDB
# MODIFIED: 30 JANUARY 1968 BY P S WEISSMAN TO CREATE RESTORDB.
# MODIFIED: 1 MARCH 1968 BY P S WEISSMAN TO SAVE EBANK AND CREATE PFLITEDB
# FUNCTIONAL DESCRIPTION:
# SETMAXDB - SET DEADBAND TO 5.0 DEGREES
# SETMINDB - SET DEADBAND TO 0.3 DEGREE
# RESTORDB - SET DEADBAND TO .3,1, OR 5 ACCORDING TO BITS 4 AND 5 OF DAPBOOLS
# PFLITEDB - SET DEADBAND TO 1.0 DEGREE AND ZERO THE COMMANDED ATTITUDE CHANGE AND COMMANDED RATE
# ALL ENTRIES SET UP A NOVAC JOB TO DO 1/ACCS SO THAT THE TJETLAW SWITCH CURVES ARE POSITIONED TO
# REFLECT THE NEW DEADBAND. IT SHOULD BE NOTED THAT THE DEADBAND REFERS TO THE ATTITUDE IN THE P-,U-,AND V-AXES.
# SUBROUTINE CALLED: NOVAC
# CALLING SEQUENCE: SAME AS ABOVE
# OR TC RESTORDB +1 FROM ALLCOAST
# DEBRIS: A, L, Q, RUPTREG1, (ITEMPS IN NOVAC)
RESTORDB CAE DAPBOOLS # DETERMINE CREW-SELECTED DEADBAND.
MASK DBSLECT2 # CHECK FOR MAX DB (5 DEG)
EXTEND
BZF +2
TCF SETMAXDB # BIT5 DAPBOOLS IS SET - CREW WANTS 5 DEG
CAE DAPBOOLS
MASK DBSELECT # CHECK FOR 1 DEG DEADBAND SELECTION
EXTEND
BZF SETMINDB
CAF POWERDB # BIT4 DAPBOOLS IS SET - CREW WANTS 1 DEG
TCF SETMAXDB +1
SETMAXDB CAF WIDEDB # SET 5 DEGREE DEADBAND.
+1 TS DB
EXTEND # SET UP JOB TO RE-POSITION SWITCH CURVES.
QXCH RUPTREG1
CALLACCS CAF PRIO27
TC NOVAC
EBANK= AOSQ
2CADR 1/ACCJOB
TC RUPTREG1 # RETURN TO CALLER.
SETMINDB CAF NARROWDB # SET 0.3 DEGREE DEADBAND.
TCF SETMAXDB +1
## Page 1405
PFLITEDB EXTEND # THE RETURN FROM CALLACCS IS TO RUPTREG1.
QXCH RUPTREG1
TC ZATTEROR # ZERO THE ERRORS AND COMMANDED RATES.
CAF POWERDB # SET DB TO 1.0 DEG.
TS DB
TCF CALLACCS # SET UP 1/ACCS AND RETURN TO CALLER.
NARROWDB OCTAL 00155 # 0.3 DEGREE SCALED AT 45.
WIDEDB OCTAL 03434 # 5.0 DEGREES SCALED AT 45.
POWERDB DEC .02222 # 1.0 DEGREE SCALED AT 45.
ZATTEROR CAF EBANK6
XCH EBANK
TS L # SAVE CALLERS EBANK IN L.
CAE CDUX
TS CDUXD
CAE CDUY
TS CDUYD
CAE CDUZ
TS CDUZD
TCF STOPRATE +3
STOPRATE CAF EBANK6
XCH EBANK
TS L # SAVE CALLERS EBANK IN L.
+3 CAF ZERO
TS OMEGAPD
TS OMEGAQD
TS OMEGARD
TS DELCDUX
TS DELCDUY
TS DELCDUZ
TS DELPEROR
TS DELQEROR
TS DELREROR
LXCH EBANK # RESTORE CALLERS EBANK.
TC Q
# SUBROUTINE NAME: ALLCOAST
#
# WILL BE CALLED BY FRESH STARTS AND ENGINE OFF ROUTINES. .
#
# CALLING SEQUENCE: (SAME AS ABOVE)
#
# EXIT: RETURN TO Q.
#
# SUBROUTINES CALLED: STOPRATE, RESTORDB, NOVAC
#
# ZERO: (FOR ALL AXES) AOS, ALPHA, AOSTERM, OMEGAD, DELCDU, DELEROR
## Page 1406
# OUTPUT: DRIFTBIT/DAPBOOLS, DB, JOB TO DO 1/ACCS
#
# DEBRIS: A, L, Q, RUPTREG1, RUPTREG2, (ITEMPS IN NOVAC)
ALLCOAST EXTEND # SAVE Q FOR RETURN
QXCH RUPTREG2
TC STOPRATE # CLEAR RATE INTERFACE. RETURN WITH A=0
LXCH EBANK # AND L=EBANK6. SAVE CALLERS EBANK.
TS AOSQ
TS AOSQ +1
TS AOSR
TS AOSR +1
TS ALPHAQ # FOR DOWNLIST.
TS ALPHAR
TS AOSQTERM
TS AOSRTERM
LXCH EBANK # RESTORE EBANK (EBANK6 NO LONGER NEEDED)
CS DAPBOOLS # SET UP DRIFTBIT
MASK DRIFTBIT
ADS DAPBOOLS
TC RESTORDB +1 # RESTORE DEADBANK TO CREW-SELECTED VALUE.
TC RUPTREG2 # RETURN.
