P30,P37.agc
### FILE="Main.annotation"
## Copyright: Public domain.
## Filename: P30,P37.agc
## Purpose: A section of Luminary revision 173.
## It is part of the reconstructed source code for the second
## (unflown) release of the flight software for the Lunar
## Module's (LM) Apollo Guidance Computer (AGC) for Apollo 14.
## The code has been recreated from a reconstructed copy of
## Luminary 178, as well as Luminary memo 167 (revision 1).
## It has been adapted such that the resulting bugger words
## exactly match those specified for Luminary 173 in NASA
## drawing 2021152N, which gives relatively high confidence
## that the reconstruction is correct.
## Reference: pp. 612-615
## Assembler: yaYUL
## Contact: Ron Burkey <info@sandroid.org>.
## Website: www.ibiblio.org/apollo/index.html
## Mod history: 2019-09-18 MAS Created from Luminary 178.
## Page 612
# PROGRAM DESCRIPTION P30 DATE 3-6-67
# MOD.1 BY RAMA AIYAWAR
# FUNCTIONAL DESCRIPTION
# ACCEPT ASTRONAUT INPUTS OF TIG,DELV(LV)
# CALL IMU STATUS CHECK ROUTINE (R02)
# DISPLAY TIME TO GO, APOGEE, PERIGEE, DELV(MAG), MGA AT IGN
# REQUEST BURN PROGRAM
# CALLING SEQUENCE VIA JOB FROM V37
# EXIT VIA V37 CALL OR TO GOTOPOOH (V34E)
# SUBROUTINE CALLS-FLAGUP, PHASCHNG, BANKCALL, ENDOFJOB, GOFLASH, GOFLASHR
# GOPERF3R, INTPRET, BLANKET, GOTOPOOH, R02BOTH, S30.1,
# TTG/N35, MIDGIM, DISPMGA
# ERASABLE INITIALIZATION- STATE VECTOR
# OUTPUT-RINIT, VINIT, +MGA, VTIG, RTIG, DELVSIN, DELVSAB, DELVSLV, HAPO,
# HPER, TTOGO
# DEBRIS- A, L, MPAC, PUSHLIST
BANK 32
SETLOC P30S
BANK
EBANK= +MGA
COUNT* $$/P30
P30 TC UPFLAG # SET UPDATE FLAG
ADRES UPDATFLG
TC UPFLAG # SET TRACK FLAG
ADRES TRACKFLG
P30N33 CAF V06N33 # T OF IGN
TC VNPOOH # RETURNS ON PROCEED, POOH ON TERMINATE
CAF V06N81 # DISPLAY DELTA V (LV)
TC VNPOOH # REDISPLAY ON RECYCLE
TC DOWNFLAG # RESET UPDATE FLAG
ADRES UPDATFLG
TC INTPRET
CALL
S30.1
SET SET
UPDATFLG
XDELVFLG
EXIT
PARAM30 CAF V06N42 # DISPLAY APOGEE,PERIGEE ,DELTA V
## Page 613
TC VNPOOH
TC INTPRET
SET
FINALFLG
REVN1645 CALL
VN1645
GOTO # COMES HERE ON RECYCLE RESPONSE
REVN1645
V06N33 VN 0633
V06N42 VN 0642
## Page 614
# PROGRAM DESCRIPTION S30.1 DATE 9NOV66
# MOD NO 1 LOG SECTION P30,P37
# MOD BY RAMA AIYAWAR **
# FUNCTIONAL DESCRIPTION
# BASED ON STORED TARGET PARAMETERS(R OF IGNITION(RTIG),V OF
# IGNITION(VTIG),TIME OF IGNITION (TIG)),COMPUTE PERIGEE ALTITUDE
# APOGEE ALTITUDE AND DELTAV REQUIRED(DELVSIN).
# CALLING SEQUENCE
# L CALL
# L+1 S30.1
# NORMAL EXIT MODE
# AT L+2 OR CALLING SEQUENCE (GOTO L+2)
# SUBROUTINES CALLED
# LEMPREC
# PERIAPO
# ALARM OR ABORT EXIT MODES
# NONE
# ERASABLE INITIALIZATION REQUIRED
# TIG TIME OF IGNITION DP B28CS
# DELVSLV SPECIFIED DELTA-V IN LOCAL VERT.
# COORDS. OF ACTIVE VEHICLE AT
# TIME OF IGNITION VECTOR B+7 METERS/CS
# OUTPUT
# RTIG POSITION AT TIG VECTOR B+29 METERS
# VTIG VELOCITY AT TIG VECTOR B+29 METERS/CS
# PDL 4D APOGEE ALTITUDE DP B+29 M , B+27 METERS.
# HAPO APOGEE ALTITUDE DP B+29 METERS
# PDL 8D PERIGEE ALTITUDE DP B+29 M , B+27 METERS.
# HPER PERIGEE ALTITUDE DP B+29 METERS
# DELVSIN SPECIFIED DELTA-V IN INERTIAL
# COORD. OF ACTIVE VEHICLE AT
# TIME OF IGNITION VECTOR B+7 METERS/CS
# DELVSAB MAG. OF DELVSIN VECTOR B+7 METERS/CS
# DEBRIS QTEMP TEMP. ERASABLE
# QPRET,MPAC
# PUSHLIST
SETLOC P30S1
BANK
COUNT* $$/S30S
S30.1 STQ DLOAD
QTEMP
TIG # TIME IGNITION SCALED AT 2(+28)CS
STCALL TDEC1
LEMPREC # ENCKE ROUTINE FOR LEM
VLOAD SXA,2
## Page 615
RATT
RTX2
STORE RTIG # RADIUS VECTOR AT IGNITION TIME
UNIT VCOMP
STOVL DELVSIN # ZRF/LV IN DELVSIN SCALED AT 2
VATT # VELOCITY VECTOR AT TIG, SCALED 2(7) M/CS
STORE VTIG
VXV UNIT
RTIG
SETPD SXA,1
0
RTX1
PUSH VXV # YRF/LV PDL 0 SCALED AT 2
DELVSIN
VSL1 PDVL
PDVL PDVL # YRF/LV PDL 6 SCALED AT 2
DELVSIN # ZRF/LV PDL 12D SCALED AT 2
DELVSLV
VXM VSL1
0
STORE DELVSIN # DELTAV IN INERT. COOR. SCALED TO B+7M/CS
ABVAL
STOVL DELVSAB # DELTA V MAG.
RTIG # (FOR PERIAPO)
PDVL VAD # VREQUIRED = VTIG + DELVSIN (FOR PERIAPO)
VTIG
DELVSIN
CALL
PERIAPO1
CALL
SHIFTR1 # RESCALE IF NEEDED
CALL # LIMIT DISPLAY TO 9999.9 N. MI.
MAXCHK
STODL HPER # PERIGEE ALT 2(29) METERS, FOR DISPLAY
4D
CALL
SHIFTR1 # RESCALE IF NEEDED
CALL # LIMIT DISPLAY TO 9999.9 N. MI.
MAXCHK
STCALL HAPO # APOGEE ALT 2(29) METERS, FOR DISPLAY
QTEMP
