DOWN_TELEMETRY_PROGRAM.agc
# Copyright: Public domain.
# Filename: DOWN_TELEMETRY_PROGRAM.agc
# Purpose: Part of the source code for Luminary 1A build 099.
# It is part of the source code for the Lunar Module's (LM)
# Apollo Guidance Computer (AGC), for Apollo 11.
# Assembler: yaYUL
# Contact: Ron Burkey <info@sandroid.org>.
# Website: www.ibiblio.org/apollo.
# Pages: 988-997
# Mod history: 2009-05-24 RSB Adapted from the corresponding
# Luminary131 file, using page
# images from Luminary 1A.
#
# 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 illegible, contact me at info@sandroid.org
# about getting access to the (much) higher-quality images which Paul
# actually created.
#
# Notations on the hardcopy document read, in part:
#
# Assemble revision 001 of AGC program LMY99 by NASA 2021112-061
# 16:27 JULY 14, 1969
# Page 988
# PROGRAM NAME -- DOWN TELEMETRY PROGRAM
# MOD NO. -- 0 TO COMPLETELY REWRITE THE DOWN TELEMETRY PROGRAM AND DOWNLINK ERASABLE DUMP PROGRAM FOR THE
# PURPOSE OF SAVING APPROXIMATELY 150 WORDS OF CORE STORAGE.
# THIS CHANGE REQUIRES AN ENTIRELY NEW METHOD OF SPECIFYING DOWNLINK LISTS. REFER TO DOWNLINK
# LISTS LOG SECTION FOR MORE DETAILS. HOWEVER THIS CHANGE WILL NOT AFFECT THE GROUND PROCESSING
# OF DOWN TELEMETRY DATA.
# MOD BY -- KILROY, SMITH, DEWITT
# DATE -- 02 OCT 67
# AUTHORS -- KILROY, SMITH, DWWITT, DEWOLF, FAGIN
# LOG SECTION -- DOWN-TELEMETRY PROGRAM
#
# FUNCTIONAL DESCRIPTION -- THIS ROUTINE IS INITIATED BY TELEMETRY END
# PULSE FROM THE DOWNLINK TELEMETRY CONVERTER. THIS PULSE OCCURS
# AT 50 TIMES PER SEC (EVERY 20 MS) THEREFORE DODOWNTM IS
# EXECUTED AT THESE RATES. THIS ROUTINE SELECTS THE APPROPRIATE
# AGC DATA TO BE TRANSMITTED DOWNLINK AND LOADS IT INTO OUTPUT
# CHANNELS 34 AND 35. THE INFORMATION IS THEN GATED OUT FROM THE
# LGC IN SERIAL FASHION.
#
# THIS PROGRAM IS CODED FOR A 2 SECOND DOWNLIST. SINCE DOWNRUPTS
# OCCUR EVERY 20 MS AND 2 AGC COMPUTER WORDS CAN BE PLACED IN
# CHANNELS 34 AND 35 DURING EACH DOWNRUPT THE PROGRAM IS CAPABLE
# OF SENDING 200 AGC WORDS EVERY 2 SECONDS.
#
# CALLING SEQUENCE -- NONE
# PROGRAM IS ENTERED VIA TCF DODOWNTM WHICH IS EXECUTED AS A
# RESULT OF A DOWNRUPT. CONTROL IS RETURNED VIA TCF RESUME WHICH
# IN EFFECT IS A RESUME.
#
# SUBROUTINES CALLED -- NONE
#
# NORMAL EXIT MODE -- TCF RESUME
#
# ALARM OR ABORT EXIT MODE -- NONE
#
# RESTART PROTECTION:
# ON A FRESH START AND RESTART THE `STARTSUB' SUBROUTINE WILL INITIALIZE THE DOWNLIST POINTER (ACTUALLY
# DNTMGOTO) TO THE BEGINNING OF THE CURRENT DOWNLIST (I.E., CURRENT CONTENTS OF DNLSTADR). THIS HAS THE
# EFFECT OF IGNORING THE REMAINDER OF THE DOWNLIST WHICH THE DOWN-TELEMETRY PROGRAM WAS WORKING ON WHEN
# THE RESTART (OR FRESH START) OCCURRED AND RESUME DOWN TELEMETRY FROM THE BEGINNING OF THE CURRENT
# DOWNLIST.
#
# ALSO OF INTEREST IS THE FACT THAT ON A RESTART THE AGC WILL ZERO DOWNLINK CHANNELS 13, 34 AND 35.
#
# DOWNLINK LIST SELECTION:
# THE APPROPRIATE DOWNLINK LISTS ARE SELECTED BY THE FOLLOWING:
# 1. FRESH START
# 2. V37EXXE WHERE XX = THE MAJOR MODE BEING SELECTED.
# 3. UPDATE PROGRAM (P27)
# 4. NON-V37 SELECTABLE TYPE PROGRAMS (E.G., AGS INITIALIZATION (SUNDANCE, LUMINARY) AND P61-P62
# TRANSITION (COLOSSUS) ETC.).
#
# DOWNLINK LIST RULES AND LIMITATIONS:
# READ SECTION(S) WHICH FOLLOW `DEBRIS' WRITEUP.
#
# OUTPUT -- EVERY 2 SECONDS 100 DOUBLE PRECISION WORDS (I.E., 200 LGC
# COMPUTER WORDS) ARE TRANSMITTED VIA DOWNLINK.
#
# ERASABLE INITIALIZATION REQUIRED -- NONE
# `DNTMGOTO' AND `DNLSTADR' ARE INITIALIZED BY THE FRESH START PROGRAM.
#
# DEBRIS (ERASABLE LOCATIONS DESTROYED BY THIS PROGRAM) --
# LDATALST, DNTMBUFF TO DNTMBUFF +21D, TMINDEX, DNQ.
# Page 989 (empty page)
# Page 990
# DODOWNTM IS ENTERED EVERY 20 MS BY AN INTERRUPT TRIGGERED BY THE
# RECEIPT OF AN ENDPULSE FROM THE SPACECRAFT TELEMETRY PROGRAMMER.
#
# NOTES REGARDING DOWNLINK LISTS ASSOCIATED WITH THIS PROGRAM:
# 1. DOWNLISTS. DOWNLISTS MUST BE COMPILED IN THE SAME BANK AS THE
# DOWN-TELEMETRY PROGRAM. THIS IS DONE FOR EASE OF CODING, FASTER
# EXECUTION.
# 2. EACH DOWNLINK LIST CONSISTS OF A CONTROL LIST AND A NUMBER OF
# SUBLISTS.
# 3. A SUBLIST REFERS TO A SNAPSHOT OR DATA COMMON TO THE SAME OR OTHER
# DOWNLINK LISTS. ANY SUBLIST CONTAINING COMMON DATA NEEDS TO BE
# CODED ONLY ONCE FOR THE APPLICABLE DOWNLINK LISTS.
# 4. SNAPSHOT SUBLISTS REFER SPECIFICALLY TO HOMOGENEOUS DATA WHICH MUST BE
# SAVED IN A BUFFER DURING ONE DOWNRUPT.
# 5. THE 1DNADR FOR THE 1ST WORD OF SNAPSHOT DATA IS FOUND AT THE END
# OF EACH SNAPSHOT SUBLIST, SINCE THE PROGRAM CODING SENDS THIS DP WORD
# IMMEDIATELY AFTER STORING THE OTHERS IN THE SNAPSHOT BUFFER.
# 6. ALL LISTS ARE COMBINATIONS OF CODED ERASABLE ADDRESS CONSTANTS
# CREATED FOR THE DOWNLIST PROGRAM.
# A. 1DNADR 1-WORD DOWNLIST ADDRESS.
# SAME AS ECADR, BUT USED WHEN THE WORD ADDRESSED IS THE LEFT
# HALF OF A DOUBLE-PRECISION WORD FOR DOWN TELEMETRY.
# B. 2DNADR - 6DNADR N-WORD DOWNLIST ADDRESS, N = 2 - 6.
# SAME AS 1DNADR, BUT WITH THE 4 UNUSED BITS OF THE ECADR FORMAT
# FILLED IN WITH 0001-0101. USED TO POINT TO A LIST OF N DOUBLE-
# PRECISION WORDS, STORED CONSECUTIVELY, FOR DOWN TELEMETRY.
# C. DNCHAN DOWNLIST CHANNEL ADDRESS.
# SAME AS 1DNADR, BUT WITH PREFIX BITS 0111. USED TO POINT TO
# A PAIR OF CHANNELS FOR DOWN TELEMETRY.
# D. DNPTR DOWN-TELEMETRY SUBLIST POINTER.
# SAME AS CAF BUT TAGGED AS A CONSTANT. USED IN CONTROL LIST TO POINT TO A SUBLIST.
# CAUTION --- A DNPTR CANNOT BE USED IN A SUBLIST.
# 7. THE WORD ORDER CODE IS SET TO ZERO AT THE BEGINNING OF EACH DOWNLIST (I.E., CONTROL LIST) AND WHEN
# A `1DNADR TIME2' IS DETECTED IN THE CONTROL LIST (ONLY).
# 8. IN THE SNAPSHOT SUBLIST ONLY, THE DNADR'S CANNOT POINT TO THE FIRST WORD OF ANY EBANK.
#
# DOWNLIST LIST RESTRICTIONS:
# (THE FOLLOWING POINTS MAY BE LISTED ELSEWHERE BUT ARE LISTED HERE SO IT IS CLEAR THAT THESE THINGS CANNOT BE
# DONE)
# 1. SNAPSHOT DOWNLIST:
# (A) CANNOT CONTAIN THE FOLLOWING ECADRS (I.E., 1DNADR'S): Q, 400, 1000, 1400, 2000, 2400, 3000, 3400.
# (B) CAN CONTAIN ONLY 1DNADR'S
# 2. ALL DOWNLINKED DATA (EXCEPT CHANNELS) IS PICKED UP BY A DCA SO DOWNLINK LISTS CANNOT CONTAIN THE
# EQUIVALENT OF THE FOLLOWING ECADRS (I.E., 1DNADRS): 377, 777, 1377, 1777, 2377, 2777, 3377, 3777.
# (NOTE: THE TERM `EQUIVALENT' MEANT THAT THE 1DNADR TO 6DNADR WILL BE PROCESSED LIKE 1 TO 6 ECADRS)
# 3. CONTROL LISTS AND SUBLISTS CANNOT HAVE ENTRIES = OCTAL 00000 OR OCTAL 77777
# Page 991
# 4. THE `1DNADR TIME2' WHICH WILL CAUSE THE DOWNLINK PROGRAM TO SET THE WORDER CODE TO 3 MUST APPEAR IN THE
# CONTROL SECTION OF THE DOWNLIST.
# 5. `DNCHAN 0' CANNOT BE USED.
# 6. `DNPTR 0' CANNOT BE USED.
# 7. DNPTR CANNOT APPEAR IN A SUBLIST.
#
# EBANK SETTINGS
# IN THE PROCESS OF SETTING THE EBANK (WHEN PICKING UP DOWNLINK DATA) THE DOWN TELEMETRY PROGRAM PUTS
# `GARBAGE' INTO BITS15-12 OF EBANK. HUGH BLAIR-SMITH WARNS US THAT BITS15-12 OF EBANK MAY BECOME
# SIGNIFICANT SOMEDAY IN THE FUTURE. IF/WHEN THAT HAPPENS, THE PROGRAM SHOULD INSURE (BY MASKING ETC.)
# THAT BITS 15-12 OF EBANK ARE ZERO.
#
# INITIALIZATION REQUIRED -- TO INTERRUPT CURRENT LIST AND START A NEW ONE.
# 1. ADRES OF DOWNLINK LIST INTO DNLSTADR
# 2. NEGONE INTO SUBLIST
# 3. NEGONE INTO DNECADR
BANK 22
SETLOC DOWNTELM
BANK
EBANK= DNTMBUFF
COUNT* $$/DPROG
DODOWNTM TS BANKRUPT
EXTEND
QXCH QRUPT # SAVE Q
TCF WOTEST
WO1 EXTEND # SET WORD ORDER BIT TO 1 ONLY IF IT
WOR CHAN13 # ALREADY ISN'T
TC DNTMGOTO # GOTO APPROPRIATE PHASE OF PROGRAM
DNPHASE1 CA NEGONE # INITIALIZE ALL CONTROL WORDS
TS SUBLIST # WORDS TO MINUS ONE
TS DNECADR
CA LDNPHAS2 # SET DNTMGOTO = 0 ALL SUSEQUENT DOWRUPTS
TS DNTMGOTO # GO TO DNPHASE2
TCF NEWLIST
DNPHASE2 CCS DNECADR # SENDING OF DATA IN PROGRESS
DODNADR TC FETCH2WD # YES -- THEN FETCH THE NEXT 2 SP WORDS
MINTIME2 -1DNADR TIME2 # NEGATIVE OF TIME2 1DNADR
TCF +1 # (ECADR OF 3776 + 74001 = 77777)
CCS SUBLIST # IS THE SUBLIST IN CONTROL
TCF NEXTINSL # YES
# Page 992
DNADRDCR OCT 74001 # DNADR COUNT AND ECADR DECREMENTER
CHKLIST CA CTLIST
EXTEND
BZMF NEWLIST # IT WILL BE NEGATIVE AT END OF LIST
TCF NEXTINCL
NEWLIST INDEX DNLSTCOD
CA DNTABLE # INITIALIZE CTLIST WITH
TS CTLIST # STARTING ADDRESS OF NEW LIST
CS DNLSTCOD
TCF SENDID +3
NEXTINCL INDEX CTLIST
CA 0
CCS A
INCR CTLIST # SET POINTER TO PICK UP NEXT CTLIST WORD
TCF +4 # ON NEXT ENTRY TO PROG. (A SHOULD NOT =0)
XCH CTLIST # SET CTLIST TO NEGATIVE AND PLACE(CODING)
COM # UNCOMPLEMENTED DNADR INTO A. (FOR LA)
XCH CTLIST # (ST IN )
+4 INCR A # (CTLIST)
TS DNECADR # SAVE DNADR
AD MINTIME2 # TEST FOR TIME2 (NEG. OF ECADR)
CCS A
TCF SETWO +1 # DON'T SET WORD ORDER CODE
MINB1314 OCT 47777 # MINUS BIT 13 AND 14 (CAN'T GET HERE)
TCF SETWO +1 # DON'T SET WORD ORDER CODE
SETWO TC WOZERO # GO SET WORD ORDER CODE TO ZERO.
+1 CA DNECADR # RELOAD A WITH THE DNADR.
+2 AD MINB1314 # IS THIS A REGULAR DNADR?
EXTEND
BZMF FETCH2WD # YES. (A MUST NEVER BE ZERO)
AD MINB12 # NO. IS IT A POINTER (DNPTR) OR A
EXTEND # CHANNEL(DNCHAN)
BZMF DODNPTR # IT'S A POINTER. (A MUST NEVER BE ZERO)
DODNCHAN TC 6 # (EXECUTED AS EXTEND) IT'S A CHANNEL
INDEX DNECADR
INDEX 0 -4000 # (EXECUTED AS READ)
TS L
TC 6 # (EXECUTED AS EXTEND)
INDEX DNECADR
INDEX 0 -4001 # (EXECUTED AS READ)
TS DNECADR # SET DNECADR
CA NEGONE # TO MINUS
XCH DNECADR # WHILE PRESERVING A.
TCF DNTMEXIT # GO SEND CHANNELS
WOZERO CS BIT7
EXTEND
WAND CHAN13 # SET WORD ORDER CODE TO ZERO
# Page 993
TC Q # RETURN TO CALLER
DODNPTR INDEX DNECADR # DNECADR CONTAINS ADRES OF SUBLIST
0 0 # CLEAR AND ADD LIST ENTRY INTO A.
CCS A # IS THIS A SNAPSHOT SUBLIST
CA DNECADR # NO, IT IS A REGULAR SUBLIST.
TCF DOSUBLST # A MUST NOT BE ZERO.
XCH DNECADR # YES. IT IS A SNAPSHOT SUBLIST.
TS SUBLIST # C(DNECADR) INTO SUBLIST
CAF ZERO # A INTO A
XCH TMINDEX # (NOTE: TMINDEX = DNECADR)
# THE FOLLOWING CODING (FROM SNAPLOOP TO SNAPEND) IS FOR THE PURPOSE OF TAKING A SNAPSHOT OF 12 DP REGISTERS.
# THIS IS DONE BY SAVING 11 DP REGISTERS IN DNTMBUFF AND SENDING THE FIRST DP WORD IMMEDIATELY.
# THE SNAPSHOT PROCESSING IS THE MOST TIME CONSUMING AND THEREFORE THE CODING AND LIST STRUCTURE WERE DESIGNED
# TO MINIMIZE TIME. THE TIME OPTIMIZATION RESULTS IN RULES UNIQUE TO THE SNAPSHOT PORTION OF THE DOWNLIST.
# THESE RULES ARE ......
# 1. ONLY 1DNADR'S CAN APPEAR IN THE SNAPSHOT SUBLIST
# 2. THE 1DNADR'S CANNOT REFER TO THE FIRST LOCATION IN ANY BANK.
SNAPLOOP TS EBANK # SET EBANK
MASK LOW8 # ISOLATE RELATIVE ADDRESS
EXTEND
INDEX A
EBANK= 1401
DCA 1401 # PICK UP 2 SNAPSHOT WORDS.
EBANK= DNTMBUFF
INDEX TMINDEX
DXCH DNTMBUFF # STORE 2 SNAPSHOT WORDS IN BUFFER
INCR TMINDEX # SET BUFFER INDEX FOR NEXT 2 WORDS.
INCR TMINDEX
SNAPAGN INCR SUBLIST # SET POINTER TO NEXT 2 WORDS OF SNAPSHOT
INDEX SUBLIST
0 0 # = CA SSSS (SSSS = NEXT ENTRY IN SUBLIST)
CCS A # TEST FOR LAST TWO WORDS OF SNAPSHOT.
TCF SNAPLOOP # NOT LAST TWO.
LDNPHAS2 GENADR DNPHASE2
TS SUBLIST # YES, LAST. SAVE A.
CA NEGONE # SET DNECADR AND
TS DNECADR # SUBLIST POINTERS
XCH SUBLIST # TO NEGATIVE VALUES
TS EBANK
MASK LOW8
EXTEND
INDEX A
EBANK= 1401
DCA 1401 # PICK UP FIRST 2 WORDS OF SNAPSHOT.
# Page 994
EBANK= DNTMBUFF
SNAPEND TCF DNTMEXIT # NOW TO SEND THEM.
FETCH2WD CA DNECADR
TS EBANK # SET EBANK
MASK LOW8 # ISOLATE RELATIVE ADDRESS
TS L
CA DNADRDCR # DECREMENT COUNT AND ECADR
ADS DNECADR
EXTEND
INDEX L
EBANK= 1400
DCA 1400 # PICK UP 2 DATA WORDS
EBANK= DNTMBUFF
TCF DNTMEXIT # NOW GO SEND THEM.
DOSUBLST TS SUBLIST # SET SUBLIST POINTER
NEXTINSL INDEX SUBLIST
0 0 # = CA SSSS (SSSS = NEXT ENTRY IN SUBLIST)
CCS A # IS IT THE END OF THE SUBLIST
INCR SUBLIST # NO --
TCF +4
TS SUBLIST # SAVE A.
CA NEGONE # SET SUBLIST TO MINUS
XCH SUBLIST # RETRIEVE A.
+4 INCR A
TS DNECADR # SAVE DNADR
TCF SETWO +2 # GO USE COMMON CODING (PROLEMS WOULD
# OCCUR IF THE PROGRAM ENCOUNTERED A
# DNPTR NOW)
DNTMEXIT EXTEND # DOWN-TELEMETRY EXIT
WRITE DNTM1 # TO SEND A + L TO CHANNELS 34 + 35
CA L # RESPECTIVELY
TMEXITL EXTEND
WRITE DNTM2
TMRESUME TCF RESUME # EXIT TELEMETRY PROGRAM VIA RESUME.
MINB12 EQUALS -1/8
DNECADR EQUALS TMINDEX
CTLIST EQUALS LDATALST
SUBLIST EQUALS DNQ
# Page 995
# SUBROUTINE NAME -- DNDUMP
#
# FUNCTIONAL DESCRIPTION -- TO SEND (DUMP) ALL ERASABLE STORAGE 'N' TIMES. (N=1 TO 4). BANKS ARE SENT ONE AT A TIME
# EACH BANK IS PRECEDED BY AN ID WORD, SYNCH BITS, ECADR AND TIME1 FOLLOWED BY THE 256D WORDS OF EACH
# EBANK. EBANKS ARE DUMPED IN ORDER (I.E., EBANK 0 FIRST, THEN EBANK1 ETC.)
#
# CALLING SEQUENCE -- THE GROUND OR ASTRONAUT BY KEYING V74E CAN INITIALIZE THE DUMP.
# AFTER KEYING IN V74E THE CURRENT DOWNLIST WILL BE IMMEDIATELY TERMINATED AND THE DOWNLINK ERASABLE DUMP
# WILL BEGIN.
#
# ONCE INITIATED THE DOWNLINK ERASABLE DUMP CAN BE TERMINATED (AND INTERRUPTED DOWNLIST REINSTATED) ONLY
# BY THE FOLLOWING:
#
# 1. A FRESH START
# 2. COMPLETION OF ALL DOWNLINK DUMPS REQUESTED (ACCORDING TO BITS SET IN DUMPCNT). NOTE THAT DUMPCNT
# CAN BE ALTERED BY A V21N01.
# 3. AND INVOLUNTARILY BY A RESTART.
#
# NORMAL EXIT MODE -- TCF DNPHASE1
#
# ALARM OR ABORT MODE -- NONE
#
# *SUBROUTINES CALLED -- NONE
#
# ERASABLE INITIALIZATION REQUIRED --
# DUMPCNT OCT 20000 IF 4 COMPLETE ERASABLE DUMPS ARE DESIRED
# DUMPCNT OCT 10000 IF 2 COMPLETE ERASABLE DUMPS ARE DESIRED
# DUMPCNT OCT 04000 IF 1 COMPLETE ERASABLE DUMP IS DESIRED
#
# DEBRIS -- DUMPLOC, DUMPSW, DNTMGOTO, EBANK, AND CENTRAL REGISTERS
#
# TIMING -- TIME (IN SECS) = ((NO.DUMPS)*(NO.EBANKS)*(WDSPEREBANK + NO.IDWDS)) / NO.WDSPERSEC
# TIME (IN SECS) = ( 4 )*( 8 )*( 256 + 4 ) / 100
# THUS TIME (IN SECS TO SEND DUMP OF ERASABLE 4 TIMES VIA DOWNLINK) = 83.2 SECONDS
#
# STRUCTURE OF ONE EBANK AS IT IS SENT BY DOWNLINK PROGRAM --
# (REMINDER -- THIS ONLY DESCRIBES ONE OF THE 8 EBANKS X 4 (DUMPS) = 32 EBANKS WHICH WILL BE SENT BY DNDUMP)
#
# DOWNLIST W
# WORD TAKEN FROM CONTENTS OF EXAMPLE O COMMENTS
# 1 ERASID 0177X 0 DOWNLIST I.D. FOR DOWNLINK ERASABLE DUMP (X=7 CSM, 6 LM)
# 2 LOWIDCOD 77340 1 DOWNLINK SYNCH BITS. (SAME ONE USED IN ALL OTHER DOWNLISTS)
# 3 DUMPLOC 13400 1 (SEE NOTES ON DUMPLOC) 1 = 3RD ERAS DUMP, 3400=ECADR OF 5TH WD
# 4 TIME1 14120 1 TIME IN CENTISECONDS
# 5 FIRST WORD OF EBANK X 03400 1 IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1400 (ECADR 3400)
# 6 2ND WORD OF EBANK X 00142 1 IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1401 (ECADR 3401)
# 7 3RD WORD OF EBANK X 00142 1 IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1402 (ECADR 3402)
# .
# .
# .
# 260D 256TH WORD OF EBANK X 03777 1 IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1777 (ECADR 3777)
#
# NOTE -- DUMPLOC CONTAINS THE COUNTER AND ECADR FOR EACH WORD BEING SENT.
# THE BIT STRUCTURE OF DUMPLOC IS FOLLOW --
# X = NOT USED
# X ABC EEE RRRRRRRR ABC = ERASABLE DUMP COUNTER (I.E. ABC = 0,1,2, OR 3 WHICH MEANS THAT
# COMPLETE ERASABLE DUMP NUMBER 1,2,3, OR 4 RESPECTIVELY IS IN PROGRESS)
# EEE = EBANK BITS
# RRRRRRRR = RELATIVE ADDRESS WITHIN AN EBANK
# Page 996
DNDUMPI CA ZERO # INITIALIZE DOWNLINK
TS DUMPLOC # ERASABLE DUMP
+2 TC SENDID # GO SEND ID AND SYNCH BITS
CA LDNDUMP1 # SET DNTMGOTO
TS DNTMGOTO # TO LOCATION FOR NEXT PASS
CA TIME1 # PLACE TIME1
XCH L # INTO L
CA DUMPLOC # AND ECADR OF THIS EBANK INTO A
TCF DNTMEXIT # SEND DUMPLOC AND TIME1
LDNDUMP ADRES DNDUMP
LDNDUMP1 ADRES DNDUMP1
DNDUMP CA TWO # INCREMENT ECADR IN DUMPLOC
ADS DUMPLOC # TO NEXT DP WORD TO BE
MASK LOW8 # DUMPED AND SAVE IT.
CCS A # IS THIS THE BEGINNING OF A NEW EBANK
TCF DNDUMP2 # NO -- THEN CONTINUE DUMPING
CA DUMPLOC # YES -- IS THIS THE END OF THE
MASK DUMPCNT # N TH (N = 1 TO 4) COMPLETE ERASABLE
MASK PRIO34 # DUMP (BIT14 FOR 4, BIT13 FOR 2 OR BIT12
CCS A # FOR 1 COMPLETE ERASABLE DUMP(S)).
TCF DNPHASE1 # YES -- START SENDING INTERRUPTED DOWNLIST
# AGAIN
TCF DNDUMPI +2 # NO -- GO BACK AND INITIALIZE NEXT BANK
DNDUMP1 CA LDNDUMP # SET DNTMGOTO
TS DNTMGOTO # FOR WORDS 3 TO 256D OF CURRENT EBANK
DNDUMP2 CA DUMPLOC
TS EBANK # SET EBANK
MASK LOW8 # ISOLATE RELATIVE ADDRESS.
TS Q # (NOTE: MASK INSTRUCTION IS USED TO PICK
CA NEG0 # UP ERASABLE REGISTERS SO THAT EDITING
TS L # REGISTERS 20-23 WILL NOT BE ALTERED.)
INDEX Q
EBANK= 1400 # PICK UP LOW ORDER REGISTER OF PAIR
MASK 1401 # OF ERASABLE REGISTERS.
XCH L
INDEX Q # PICK UP HIGH ORDER REGISTER OF PAIR
MASK 1400 # OF ERASABLE REGISTERS.
EBANK= DNTMBUFF
TCF DNTMEXIT # GO SEND THEM
SENDID EXTEND # ** ENTRANCE USED BY ERASABLE DUMP PROG. **
QXCH DNTMGOTO # SET DNTMGOTO SO NEXT TIME PROG WILL GO
CAF ERASID # TO LOCATION FOLLOWING `TC SENDID'
TS L # ** ENTRANCE USED BY REGULAR DOWNLINK PG **
# Page 997
TC WOZERO # GO SET WORD ORDER CODE TO ZERO
CAF LOWIDCOD # PLACE SPECIAL ID CODE INTO L
XCH L # AND ID BACK INTO A
TCF DNTMEXIT # SEND DOWNLIST ID CODE(S).
WOTEST CA BIT7 # AT THE BEGINNING OF THE LIST THE WORD
EXTEND # ORDER BIT WILL BE SET BACK TO ZERO
RAND CHAN13
CCS A
TC DNTMGOTO
CA BIT7
TCF WO1
