swh:1:snp:92f3f585b9ae79620ad8c41a332d6329b31fd381
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
MP9-DPS_1_BURN.agc
### FILE="Main.annotation"
## Copyright: Public domain.
## Filename: MP9-DPS_1_BURN.agc
## Purpose: A module for revision 0 of BURST120 (Sunburst). It
## is part of the source code for the Lunar Module's
## (LM) Apollo Guidance Computer (AGC) for Apollo 5.
## Assembler: yaYUL
## Contact: Ron Burkey <info@sandroid.org>.
## Website: www.ibiblio.org/apollo/index.html
## Mod history: 2016-09-30 RSB Created draft version.
## 2016-10-28 MAS Transcribed.
## 2016-11-01 RSB Typos.
## 2016-12-06 RSB Comments proofed using octopus/ProoferComments,
## changes made.
## Page 728
# MISSION PHASE 9
BANK 33
EBANK= TDEC
# PROGRAM DESCRIPTION-MISSION PHASE9-DPS1 BURN DATE-28 OCT 66
# MOD NO-2 LOG SECTION-MP9
# MOD BY- CHO ASSEMBLY-SUNBURST REV24
# FUNCTIONAL DESCRIPTION
# THIS PHASE IS STARTED 3HOUR 1MIN AND 49SECS AFTER THE TERMINATI ON OF SIVB/LEM SEPARATION +X TRANSLATI
# ON AND BY THE INITIATION OF PROGRAM 31 (PRE-DPS1 BURN). PROGRAM 31 CALLS FOR DPS CUTOFF TDI 5MIN AND
# 15SECS LATER. IN ORDER TO ALIGN THE VEHICLE THRUST AXIS ALONG THE DESIRED ACCELERATION VECTOR DURING PRE-DPS1
# PHASE, THE FOLLOWING COMPUTATIONS ARE MADE - VEHICLE STATE VECTOR FORWARD INTEGRATION TO THE DESCENT
# INJECTION CUTOFF TIME TDI, VELOCITY TO BE GAINED VG, THE MANEUVER THRUST TIME TTHRUST, DPS1 IGNITION TIME TIGN
# AND FINALLY DESIRED THRUST DIRECTION UNITVG. PROGRAM 31 ALSO COMMANDS LANDING GEAR DEPLOYMENT AND CALL FOR
# A MANEUVER TO THE FIRING ATTITUDE.
# PROGRAM 41, DPS1 BURN IS STARTED 36SECS BEFORE IGNITION. THIS PROGRAM ARMS THE DESCENT ENGINE,
# COMMANDS +X TRANSLATION AND COMMANDS ENGINE ON. DURING THE BURN, THE VELOCITY TO BE GAINED AND TIME TO
# CUTOFF TGO ARE COMPUTED EVERY TWO SECONDS. WHEN TGO FALLS BELOW THE CRITICAL VALUE ENGINE OFF SIGNAL COUNTER
# IS SET. WHEN POST ENGINE CUTOFF ROUTINE IS PERFORMED, MPENTRY NO.1 IS SET TO START MP11 IN 31MIN 11SECS.
# CALLING SEQUENCE- AFTER THE TERMINATION OF SIVB/LEM SEPARATION +X TRANSLATION AND BY THE INITIATION OF
# PROGRAM 31.
# NORMAL EXIT MODES- TASKOVER (AWAITS MPENTRY INTO MP11 VIA NO.1)
# ALARM EXIT MODE- NONE
# SUBROUTINES CALLED- FIXDELAY, 1LMP, 2LMP, EXECUTIVE, MIDTOAVE, BANKCALL, IBNKCALL, WAITLIST, KALCMANU,
# UL4JETON, UL4JETOFF, ENGINEON, ENGINOFF, NEWMODEX, DFITCAL, RVUPDADR, TPAGREE, TASKOVER, ENDOFJOB, ENGOF1
# INPUT- RN, VN, RP, MUEARTH, TDI
# OUTPUT- VG, TTHRUST, TIGN, UNITVG, TGO
# ERASABLE INITIALIZATION REQUIRED-
# DEBRIS- TDEC
MP9JOB CAF BIT9
TC SETRSTRT # SET RESTART FLAG
TC NEWMODEX # DISPLAY PROG. NO.
OCTAL 31
EBANK= TDEC
EXTEND
DCA TIME2 # PICK UP CURRENT TIME
DXCH TDI
## Page 729
EXTEND
DCA 5M15S
DAS TDI # SET TDI=TIME2+5M15S
CAF EQU2ADR # SET COMPUTATIINAL STEPS
TS SHJUMP1
TC PHASCHNG
OCT 05022
OCT 20000
EXTEND
DCA TDI
DXCH TDEC
EXTEND
DCA RVUPDADR # STATE VECTOR UPDATE FOR PRE-DPS1 BURN
DXCH Z
TC PHASCHNG
OCT 04022
TC INTPRET
CALL
VPATCHER # RESCALE AND LOAD TDI STATES IN RN AN VN
GOTO
DPS1EQU1 +1 # COMPUTES VELOCITY TO BE GAINED.
DPS1EQU2 DLOAD # COMPUTES MANEUVER THRUST TIME
LV # ABVAL(VG)
SR DSU
10D # NOW VG SCALED AT 2(+17)M/CS
DPA
DDV DAD
DPB
DPC
STOVL TTHRUST # SCALED AT 2(+28)CS
UNITVG
STOVL POINTVSM # KALCMANU INPUT REGISTER
BODYVECT # LOAD BODY AXES VECTOR IN SM COORD.
STORE SCAXIS # KALCMANU INPUT VECTOR
SET SSP
33D
RATEINDX
4 # SET KALCMANU FOR ANGULAR RATE OF 5DEG/S
EXIT
TC PHASCHNG
OCT 04022
INHINT
## Page 730
EXTEND
DCS TTHRUST # COMPUTES TIGN
DXCH TIGN
EXTEND
DCA TDI
DAS TIGN # TIGN=TDI-TTHRUST (SCALED AT 2(+28)CS)
CAF EQU3ADR
TS SHJUMP1
CAF 70SECS9 # CALL POSTKALC 70 SECS LATER
TC WAITLIST
EBANK= TDEC
2CADR POSTKALC
TC PHASCHNG
OCT 40042
CALLKALC INHINT
CAF PRIO16 # CALL KALCMANU JOB.
TC FINDVAC
EBANK= MIS
2CADR VECPOINT
TC BANKCALL
CADR ATTSTALL # SEE IF KALCMANU FINISHED
CURT9 TC CURTAINS # UNFINISHED MANEUVER
TC PHASCHNG
OCT 00432 # 2.43 FOR POSTKALC. DON'T RESET TBASE.
TCF ENDOFJOB # GOOD RETURN- END MP9JOB
POSTKALC CS FLAGWRD2 # CHECK WHETHER KALCMANU IS FINISHED.
MASK BIT11
CCS A
TC GOODKALC # GOOD RETURN
CAF PRIO37 # BAD RETURN
TC FINDVAC
EBANK= TDEC
2CADR CURT9
TC TASKOVER # END POSTKALC TASK
GOODKALC TC 1LMP+DT
DEC 236 # DFI T/M CALIBRATE - ON *
DEC 1200
## Page 731
TC 2LMP+DT
DEC 237 # DFI T/M CALIBRATE - OFF *
DEC 198 # MASTER C&W ALARM RESET - COMMAND **
DEC 200
TC 1LMP+DT
DEC 199 # MASTER C&W ALARM RESET - COMMAND RESET
DEC 1
EXTEND # CALL DPS1 BURN PROG. AT TIGN-36SECS.
DCS TIME2
DXCH ITEMP1
EXTEND
DCA TIGN
DAS ITEMP1
EXTEND
DCS 66SECSD9
DAS ITEMP1
EXTEND
DCA ITEMP1
DXCH TDECTEMP # FOR RESTARTS.
DXCH ITEMP1
TC LONGCALL
EBANK= TDEC
2CADR TIG9-66
TC PHASCHNG
OCT 20134 # 4.13 FOR TIG9-66 LONGCALL.
CAF 11SECS9
TC WAITLIST
EBANK= TDEC
2CADR 182LMP
TC PHASCHNG
OCT 40452 # 2.45 FOR 182LMP TASK.
TCF TASKOVER # END GOODKALC TASK
182LMP TC 2LMP+DT
DEC 182 # LANDING RADAR POWER ON
DEC 26 # RADAR SELF TEST-ON
DEC 4900
TC 1LMP+DT
DEC 4 # ED BATTERY ACTIVATION -ON
DEC 500
TC 1LMP+DT
## Page 732
DEC 8 # LANDING GEAR DEPLOY -FIRE
DEC 200
TC 1LMP+DT
DEC 9 # LANDING GEAR DEPLOY- FIRE RESET
DEC 400
TC 1LMP
DEC 27 # RADAR SELF-TEST - OFF.
TC PHASCHNG
OCT 00002 # GROUP 2 OFF.
TC TASKOVER # END 182LMP TASK
TIG9-66 TC NEWMODEX # DISPLAY PROGRAM NUMBER ON DSKY
OCT 41
TC IBNKCALL
CADR ENGINOF1
TC 2LMP
DEC 150 # ENGINE SELECT DESC ARM
DEC 86 # MANUAL THROTTLE ON (10PERCENT)
CAF 50SECS9
TC WAITLIST
EBANK= TDEC
2CADR 228LMP
CAF PRIO27
TC FINDVAC
EBANK= TDEC
2CADR ORBINTJB
TC 2PHSCHNG
OCT 40472 # 2.47 FOR 228LMP TASK.
OCT 00154 # 4.15 FOR ORBINTJB JOB.
TCF TASKOVER # END TIG9-66 TASK
ORBINTJB EXTEND
DCA TIGN
DXCH TDEC
CS 30SECS9
TS L
CS ZERO
DAS TDEC # TDEC NOW CONTAINS TIGN-30 SECS.
EXTEND
## Page 733
DCA ORBINTAD
DXCH Z
TC PHASCHNG
OCT 05024
OCT 27000
# RN AND VN IN STABLE MEMBER COORDINATES. SCALING IS AS IN AVEG.
# DELETE
CAF AVGENADR
TS DVSELECT # SELECT AGS MONITOR
EXTEND
DCA EXITADR
DXCH AVGEXIT # SET AVERAGEG EXIT
EXTEND
DCA MP9TM1AD
DXCH DVMNEXIT # SET MONITOR EXIT
INHINT
CS 30SECS9 # CALL PREREAD AT TIGN-30SECS.
TC TASKSETR
TS RSDTTEMP # FOR RESTARTS.
TC WAITLIST
EBANK= DVTOTAL
2CADR PREREAD
TC 2PHSCHNG
OCT 40355 # 5.35 FOR PREREAD.
OCT 04024
INHINT
CS ZERO # CALL TVC FOR DPS1 AT IGNITION TIME
TC TASKSETR
TS TDECTEMP +1 # FOR RESTARTS.
TC WAITLIST
EBANK= AVGEXIT
2CADR TIG9-0
TC PHASCHNG
OCT 40174 # 4.17 FOR TIG9-0.
TCF ENDOFJOB # END ORBITAL INTEGRATION JOB
TIG9-0 EXTEND
DCA EQU1ADR
DXCH AVGEXIT # AVG ROUTINE GOES TO VG COMPUTATION
## Page 734
TC IBNKCALL
CADR DPSENGON
## The above line has a green arrow pointing to it.
TC 2PHSCHNG
OCT 00004
OCT 40512 # 2.51 FOR 9ULLOFF TASK.
TC FIXDELAY
DEC 50
9ULLOFF TC IBNKCALL
CADR NOULLAGE # +X TRANSLATION- OFF
TC PHASCHNG
OCT 40532 # 2.53 FOR 9EDBATT.
TC FIXDELAY
DEC 250
9EDBATT TC 1LMP+DT
DEC 5 # ED BATTERY ACTIVATION-SAFE
DEC 2300
TC 2PHSCHNG
OCT 2
OCT 05014 # THROTTLE PROGRAM TAKES OVER GP 4.
OCT 77777
CAF POSMAX # CALL FOR MAXIMUM THRUST.
TS PCNTF
EXTEND
DCA PCNTFMAD
DTCB
TCF TASKOVER # END TIG9-0 TASK
DPS1EQU3 CALL
CALCTGO
VLOAD
UNITVG
STORE AXISD # FINDCDUD INPUT
CALL
FINDCDUD
EXIT
TC POSTJUMP
CADR SERVEXIT
CALCTGO DLOAD DSU
LV # ABVAL(VG)
## Page 735
VTAILOFF
DMP DDV
DELTAT9
ABDELV
STORE TTGO # FOR DWLK ONLY
RTB BDSU
LOADTIME
PIPTIME
DAD RTB
TTGO
SGNAGREE
STORE TGO
DSU BPL
4SECSD9
QPRET
EXIT
INHINT
CAE TGO +1
EXTEND
BZMF CUTOFF2 # CUT OFF ENGINE IMMEDIATELY IF TGO NEG
CUTOFF1 TS TDECTEMP # FOR RESTARTS.
TC WAITLIST
EBANK= CDUXD
2CADR CUTOFF
EXTEND # STOPS GUIDANCE EQUATION LOOP
DCA EXITADR
DXCH AVGEXIT
TC 2PHSCHNG
OCT 40552 # 2.55 FOR CUTOFF TASK.
OCT 00035 # 5.3 FOR SERVICER.
TCF ENDOFJOB # END DPS1 BURN EQUATION JOB
CUTOFF TC IBNKCALL
CADR ENGINOFF
TC IBNKCALL
CADR STOPRATE # HOLD VEHICLE ATTITUDE
TC PHASCHNG
OCT 2 # 2 OFF. SERVICER TO RETURN TO MP9TERM1.
TCF TASKOVER # END CUTOFF TASK
CUTOFF2 CAF BIT1
## Page 736
TCF CUTOFF1
MP9TERM1 INHINT
CAF 5SECS9
TC WAITLIST
EBANK= TDEC
2CADR 87LMP
TC PHASCHNG
OCT 40572 # 2.57 FOR 87LMP TASK.
TC POSTJUMP
CADR SERVEXIT
87LMP TC 2LMP+DT
DEC 87 # MANUAL THROTTLE - RESET (30 PERCENT.)
DEC 151 # ENGINE SELECT-DESC ARM-OFF
DEC 1000
TC 2LMP+DT
DEC 245 # DPS PQGS NO1 - OFF
DEC 213 # DPS PQGS NO2 - OFF
DEC 100
TC 2LMP+DT
DEC 229 # DPS PQGS ARM NO1 DISABLE
DEC 197 # DPS PQGS ARM NO2 DISABLE
DEC 1400
TC IBNKCALL
CADR SETMAXDB
TC 1LMP+DT
DEC 26 # RADAR SELF TEST ON
DEC 6000
TC 2LMP
DEC 27 # RADAR SELF TEST POWER - OFF
DEC 183 # LANDING RADAR POWER - OFF
TC MPENTRY # CALL NEXT MISSION ENTRY ROUTINE
DEC 1
DEC 11
ADRES MP9-11DT
TC FLAG1DWN # KNOCK DOWN AVERAGEG FLAG
OCT 00001
TC PHASCHNG
OCT 2
## Page 737
TCF TASKOVER # MISSION PHASE 9 COMPLETE
DPS1EQU1 TC INTPRET
+1 VLOAD VXV
VN # VN SCALED AT 2(+7)M/CS
UNITR # UNITR IS UNIT VECTOR ALONG RN
UNIT PDVL
UNITR
VXV
PDDL DAD
RP # TARGET DISTANCE - PERIGEE OR APOGEE
RMAG # RP AND RMAG SCALED AT 2(+24)M
DMP PDDL
RMAG
RP
DMP DDV
2MUERTH9 # SCALED AT 2(+38)M(3)/CS(2).
SQRT VXSC
VSL2
STORE VDVECT # FOR DWNLK ONLY. SCALED AT 2(+7)M/CS
VSU
VN
STORE VGVECT # FOR DWNLK ONLY. SCALED AT 2(+7)M/CS
UNIT # LEAVES ABVAL IN LV
STORE UNITVG
GOTO
SHJUMP1
228LMP TC 2LMP+DT
DEC 228 # DPS PQGS ARM NO1 - ENABLE
DEC 196 # DPS PQGS ARM NO2 - ENABLE
DEC 100
TC 2LMP+DT
DEC 244 # DPS PQGS NO1 - ON
DEC 212 # DPS PQGS NO2 - ON
DEC 750
TC IBNKCALL
CADR ULLAGE # +X TRANSLATION ON.
TC PHASCHNG
OCT 2
TCF TASKOVER # END 228LMP TASK
# ********************************
## Page 738
EQU2ADR CADR DPS1EQU2
EQU3ADR CADR DPS1EQU3
EBANK= TDEC
EQU1ADR 2CADR DPS1EQU1
EBANK= TDEC
MP9TM1AD 2CADR MP9TERM1
EBANK= TDEC
RVUPDADR 2CADR RVUPDATE
4SECSD9 2DEC 400
66SECSD9 2DEC 6600
5M15S 2DEC 31500
DPA 2DEC .09449 B-17 # SCALED AT 2(+17)M/CS
DPB 2DEC .0002874 B+11 # SCALED AT 2(-11)M/CS(+2)
DPC 2DEC 2600. B-28 # SCALED AT 2(+28)CS
DELTAT9 2DEC 200 E+4 B-35 # 2SEC/KPIP
2MUERTH9 2DEC* 3.98603223 E+10 B-37*
5SECS9 DEC 500
50SECS9 DEC 5000
30SECS9 DEC 3000
11SECS9 DEC 1100
70SECS9 DEC 7000
# ********************************
