442 lines
17 KiB
Plaintext
442 lines
17 KiB
Plaintext
# Copyright: Public domain.
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# Filename: DOWN-TELEMETRY_PROGRAM.agc
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# Purpose: Part of the source code for Comanche, build 055. It
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# is part of the source code for the Command Module's
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# (CM) Apollo Guidance Computer (AGC), Apollo 11.
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# Assembler: yaYUL
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# Reference: pp. 1093-1102
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# Contact: Ron Burkey <info@sandroid.org>
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# Website: http://www.ibiblio.org/apollo.
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# Mod history: 2009-05-08 RSB Adapted from Colossus249/ file of same name
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# and page images. Corrected various typos
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# in the transcription of program comments,
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# and these should be back-ported to
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# Colossus249.
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#
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# The contents of the "Comanche055" files, in general, are transcribed
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# from scanned documents.
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#
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# Assemble revision 055 of AGC program Comanche by NASA
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# 2021113-051. April 1, 1969.
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#
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# This AGC program shall also be referred to as Colossus 2A
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#
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# Prepared by
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# Massachusetts Institute of Technology
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# 75 Cambridge Parkway
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# Cambridge, Massachusetts
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#
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# under NASA contract NAS 9-4065.
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#
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# Refer directly to the online document mentioned above for further
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# information. Please report any errors to info@sandroid.org.
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# Page 1093
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# PROGRAM NAME- DOWN TELEMETRY PROGRAM
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# MOD NO.- 0 TO COMPLETELY REWRITE THE DOWN TELEMETRY PROGRAM AND DOWNLINK ERASABLE DUMP PROGRAM FOR THE
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# PURPOSE OF SAVING APPROXIMATELY 150 WORDS OF CORE STORAGE.
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# THIS CHANGE REQUIRES AN ENTIRELY NEW METHOD OF SPECIFYING DOWNLINK LISTS. REFER TO DOWNLINK
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# LISTS LOG SECTION FOR MORE DETAILS. HOWEVER THIS CHANGES WILL NOT AFFECT THE GROUND PROCESSING
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# OF DOWN TELEMETRY DATA.
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# MOD BY- KILROY, SMITH, DEWITT
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# DATE- 02OCT67
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# AUTHORS- KILROY, SMITH, DWWITT, DEWOLF, FAGIN
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# LOG SECTION- DOWN-TELEMETRY PROGRAM
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# FUNCTIONAL DESCRIPTION- THIS ROUTINE IS INITIATED BY TELEMETRY END
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# PULSE FROM THE DOWNLINK TELEMETRY CONVERTER. THIS PULSE OCCURS
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# AT 50 TIMES PER SEC(EVERY 20 MS) THEREFORE DODOWNTM IS
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# EXECUTED AT THESE RATES. THIS ROUTINE SELECTS THE APPROPRIATE
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# AGC DATA TO BE TRANSMITTED DOWNLINK AND LOADS IT INTO OUTPUT
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# CHANNELS 34 AND 35. THE INFORMATION IS THEN GATED OUT FROM THE
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# LGC IN SERIAL FASHION.
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# THIS PROGRAM IS CODED FOR A 2 SECOND DOWNLIST. SINCE DOWNRUPTS
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# OCCUR EVERY 20MS AND 2 AGC COMPUTER WORDS CAN BE PLACED IN
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# CHANNELS 34 AND 35 DURING EACH DOWNRUPT THE PROGRAM IS CAPABLE
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# OF SENDING 200 AGC WORDS EVERY 2 SECONDS.
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# CALLING SEQUENCE- NONE
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# PROGRAM IS ENTERED VIA TCF DODOWNTM WHICH IS EXECUTED AS A
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# RESULT OF A DOWNRUPT. CONTROL IS RETURNED VIA TCF RESUME WHICH
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# IN EFFECT IS A RESUME.
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# SUBROUTINES CALLED- NONE
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# NORMAL EXIT MODE- TCF RESUME
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# ALARM OR ABORT EXIT MODE- NONE
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# RESTART PROTECTION:
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# ON A FRESH START AND RESTART THE 'STARTSUB' SUBROUTINE WILL INITIALIZE THE DOWNLIST POINTER(ACTUALLY
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# DNTMGOTO) TO THE BEGINNING OF THE CURRENT DOWNLIST(I.E., CURRENT CONTENTS OF DNLSTADR). THIS HAS THE
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# EFFECT OF IGNORING THE REMAINDER OF THE DOWNLIST WHICH THE DOWN-TELEMETRY PROGRAM WAS WORKING ON WHEN
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# THE RESTART(OR FRESH START) OCCURRED AND RESUME DOWN TELEMETRY FROM THE BEGINNING OF THE CURRENT
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# DOWNLIST.
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# ALSO OF INTEREST IS THE FACT THAT ON A RESTART THE AGC WILL ZERO DOWNLINK CHANNELS 13, 34 AND 35.
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# DOWNLINK LIST SELECTION:
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# THE APPROPRIATE DOWNLINK LISTS ARE SELECTED BY THE FOLLOWING:
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# 1. FRESH START
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# 2. V37EXXE WHERE XX = THE MAJOR MODE BEING SELECTED.
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# 3. UPDATE PROGRAM(P27)
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# 4. NON-V37 SELECTABLE TYPE PROGRAMS(E.G. AGS INITIALIZATION(SUNDANCE,LUMINARY) AND P61-P62
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# TRANSITION(COLOSSUS) ETC.).
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# DOWNLINK LIST RULES AND LIMITATIONS:
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# READ SECTION(S) WHICH FOLLOW 'DEBRIS' WRITEUP.
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# OUTPUT- EVERY 2 SECONDS 100 DOUBLE PRECISION WORDS(I.E. 200 LGC
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# COMPUTER WORDS) ARE TRANSMITTED VIA DOWNLINK.
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# ERASABLE INITIALIZATION REQUIRED- NONE
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# 'DNTMGOTO' AND 'DNLSTADR' ARE INITIALIZED BY THE FRESH START PROGRAM.
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# DEBRIS(ERASABLE LOCATIONS DESTROYED BY THIS PROGRAM)-
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# LDATALST,DNTMBUFF TO DNTMBUFF +21D,TMINDEX,DNQ.
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# Page 1094
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# (No source on this page of the original assembly listing.)
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# Page 1095
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# DODOWNTM IS ENTERED EVERY 20 MS BY AN INTERRUPT TRIGGERED BY THE
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# RECEIPT OF AN ENDPULSE FROM THE SPACECRAFT TELEMETRY PROGRAMMER.
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#
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# NOTES REGARDING DOWNLINK LISTS ASSOCIATED WITH THIS PROGRAM:
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# 1. DOWNLISTS. - DOWNLISTS MUST BE COMPILED IN THE SAME BANK AS THE
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# DOWN-TELEMETRY PROGRAM. THIS IS DONE FOR EASE OF CODING, FASTER
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# EXECUTION.
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# 2. EACH DOWNLINK LIST CONSISTS OF A CONTROL LIST AND A NUMBER OF
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# SUBLISTS.
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# 3. A SUBLIST REFERS TO A SNAPSHOT OR DATA COMMON TO THE SAME OR OTHER
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# DOWNLINK LISTS. ANY SUBLIST CONTAINING COMMON DATA NEEDS TO BE
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# CODED ONLY ONCE FOR THE APPLICABLE DOWNLINK LISTS.
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# 4. SNAPSHOT SUBLISTS REFER SPECIFICALLY TO HOMOGENOUS DATA WHICH MUST BE
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# SAVED IN A BUFFER DURING ONE DOWNRUPT.
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# 5. THE 1DNADR FOR THE 1ST WORD OF SNAPSHOT DATA IS FOUND AT THE END
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# OF EACH SNAPSHOT SUBLIST, SINCE THE PROGRAM CODING SENDS THIS DP WORD
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# IMMEDIATELY AFTER STORING THE OTHERS IN THE SNAPSHOT BUFFER.
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# 6. ALL LISTS ARE COMBINATIONS OF CODED ERASABLE ADDRESS CONSTANTS
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# CREATED FOR THE DOWNLIST PROGRAM.
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# A. 1DNADR 1-WORD DOWNLIST ADDRESS.
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# SAME AS ECADR, BUT USED WHEN THE WORD ADDRESSED IS THE LEFT
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# HALF OF A DOUBLE-PRECISION WORD FOR DOWN TELEMETRY.
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# B. 2DNADR - 6DNADR N-WORD DOWNLIST ADDRESS, N = 2 - 6.
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# SAME AS 1DNADR, BUT WITH THE 4 UNUSED BITS OF THE ECADR FORMAT
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# FILLED IN WITH 0001-0101. USED TO POINT TO A LIST OF N DOUBLE-
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# PRECISION WORDS, STORED CONSECUTIVELY, FOR DOWN TELEMETRY.
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# C. DNCHAN DOWNLIST CHANNEL ADDRESS.
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# SAME AS 1DNADR, BUT WITH PREFIX BITS 0111. USED TO POINT TO
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# A PAIR OF CHANNELS FOR DOWN TELEMETRY.
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# D. DNPTR DOWN TELEMETRY SUBLIST POINTER.
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# SAME AS CAF BUT TAGGES AS A CONSTANT. USED IN CONTROL LIST TO POINT TO A SUBLIST.
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# CAUTION--- A DNPTR CANNOT BE USED IN A SUBLIST.
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# 7. THE WORD ORDER CODE IS SET TO ZERO AT THE BEGINNING OF EACH DOWNLIST (I.E., CONTROL LIST) AND WHEN
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# A '1DNADR TIME2' IS DETECTED IN THE CONTROL LIST(ONLY).
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# 8. IN THE SNAPSHOT SUBLIST ONLY, THE DNADR'S CANNOT POINT TO THE FIRST WORD OF ANY EBANK.
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#
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# DOWNLINK LIST RESTRICTIONS:
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# (THE FOLLOWING POINTS MAY BE LISTED ELSEWHERE BUT ARE LISTED HERE SO IT IS CLEAR THAT THESE THINGS CANNOT BE
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# DONE)
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#
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# 1. SNAPSHOT DOWNLIST:
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# (A) CANNOT CONTAIN THE FOLLOWING ECADRS(I.E. 1DNADR'S): 0, 400, 1000, 1400, 2000, 2400, 3000, 3400.
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# (B) CAN CONTAIN ONLY 1DNADR'S
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#
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# 2. ALL DOWNLINKED DATA(EXCEPT CHANNELS) IS PICKED UP BY A <DCA<SO DOWNLINK LISTS CANNOT CONTAIN THE
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# EQUIVALENT OF THE FOLLOWING ECADRS(I.E. IDNADRS): 377, 777, 1377, 1777, 2377, 2777, 3377, 3777.
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#
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# (NOTE: THE TERM EQUIVALENT ' MEANT THAT THE IDNADR TO 6DNADR WILL BE PROCESSED LIKE 1 TO 6 ECADRS)
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#
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# 3. CONTROL LISTS AND SUBLISTS CANNOT HAVE ENTRIES = OCTAL 00000 OR OCTAL 77777
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# Page 1096
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# 4. THE '1DNADR TIME2' WHICH WILL CAUSE THE DOWNLINK PROGRAM TO SET THE WORDER CODE TO 3 MUST APPEAR IN THE
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# CONTROL SECTION OF THE DOWNLIST.
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#
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# 5. 'DNCHAN 0' CANNOT BE USED.
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#
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# 6. 'DNPTR 0' CANNOT BE USED.
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#
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# 7. DNPTR CANNOT APPEAR IN A SUBLIST.
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#
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#
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#
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#
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# EBANK SETTINGS
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# IN THE PROCESS OF SETTING THE EBANK(WHEN PICKING UP DOWNLINK DATA) THE DOWN TELEMETRY PROGRAM PUTS
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# 'GARBAGE' INTO BITS15-12 OF EBANK. HUGH BLAIR-SMITH WARNS US THAT BITS15-12 OF EBANK MAY BECOME
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# SIGNIFICANT SOMEDAY IN THE FUTURE. IF/WHEN THAT HAPPENS, THE PROGRAM SHOULD INSURE(BY MASKING ETC.)
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# THAT BITS 15-12 OF EBANK ARE ZERO.
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# INITIALIZATION REQUIRED- TO INTERRUPT CURRENT LIST AND START A NEW ONE..
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# 1. ADRES OF DOWNLINK LIST INTO DNLSTADR
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# 2. NEGONE INTO SUBLIST
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# 3. NEGONE INTO DNECADR
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BANK 22
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SETLOC DOWNTELM
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BANK
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EBANK= DNTMBUFF
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COUNT 05/DPROG
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DODOWNTM TS BANKRUPT
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EXTEND
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QXCH QRUPT # SAVE Q
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CA BIT7 # SET WORD ORDER CODE TO 1. EXCEPTION- AT
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EXTEND # THE BEGINNING OF EACH LIST THE WORD
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WOR CHAN13 # CODE WILL BE SET BACK TO 0.
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TC DNTMGOTO # GO TO APPROPRIATE PHASE OF PROGRAM
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DNPHASE1 CA NEGONE # INITIALIZE ALL CONTROL WORDS
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TS SUBLIST # WORDS TO MINUS ONE
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TS DNECADR
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CA LDNPHAS2 # SET DNTMGOTO =0 ALL SUBSEQUENT DOWNRUPTS
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TS DNTMGOTO # GO TO DNPHASE2
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TCF NEWLIST
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DNPHASE2 CCS DNECADR # SENDING OF DATA IN PROGRESS
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DODNADR TC FETCH2WD # YES - THEN FETCH THE NEXT 2 SP WORDS
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MINTIME2 -1DNADR TIME2 # NEGATIVE OF TIME2 1DNADR
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TCF +1 # (ECADR OF 3776 + 74001 = 77777)
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CCS SUBLIST # IS THE SUBLIST IN CONTROL
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# Page 1097
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TCF NEXTINSL # YES
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DNADRDCR OCT 74001 # DNADR COUNT AND ECADR DECREMENTER
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CHKLIST CA CTLIST
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EXTEND
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BZMF NEWLIST # IT WILL BE NEGATIVE AT END OF LIST
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TCF NEXTINCL
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NEWLIST INDEX DNLSTCOD
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CA DNTABLE # INITIALIZE CTLIST WITH
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TS CTLIST # STARTING ADDRESS OF NEW LIST
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CS DNLSTCOD
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TCF SENDID +3
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NEXTINCL INDEX CTLIST
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CA 0
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CCS A
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INCR CTLIST # SET POINTER TO PICK UP NEXT CTLIST WORD
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TCF +4 # ON NEXT ENTRY TO PROG. (A SHOULD NOT =0)
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XCH CTLIST # SET CTLIST TO NEGATIVE AND PLACE(CODING)
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COM # UNCOMPLEMENTED DNADR INTO A. (FOR LA)
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XCH CTLIST # (ST IN )
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+4 INCR A # (CTLIST)
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TS DNECADR # SAVE DNADR
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AD MINTIME2 # TEST FOR TIME2 (NEG. OF ECADR)
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CCS A
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TCF SETWO +1 # DON'T SET WORD ORDER CODE
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MINB1314 OCT 47777 # MINUS BIT 13 AND 14 (CAN'T GET HERE)
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TCF SETWO +1 # DON'T SET WORD ORDER CODE
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SETWO TC WOZERO # GO SET WORD ORDER CODE TO ZERO.
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+1 CA DNECADR # RELOAD A WITH THE DNADR.
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+2 AD MINB1314 # IS THIS A REGULAR DNADR?
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EXTEND
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BZMF FETCH2WD # YES. (A MUST NEVER BE ZERO)
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AD MINB12 # NO- IS IT A POINTER (DNPTR) OR A
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EXTEND # CHANNEL(DNCHAN)
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BZMF DODNPTR # IT'S A POINTER. (A MUST NEVER BE ZERO)
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DODNCHAN TC 6 # (EXECUTED AS EXTEND) IT S A CHANNEL
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INDEX DNECADR
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INDEX 0 -4000 # (EXECUTED AS READ)
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TS L
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TC 6 # (EXECUTED AS EXTEND)
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INDEX DNECADR
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INDEX 0 -4001 # (EXECUTED AS READ)
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TS DNECADR # SET DNECADR
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CA NEGONE # TO MINUS
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XCH DNECADR # WHILE PRESERVING A.
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TCF DNTMEXIT # GO SEND CHANNELS
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WOZERO CS BIT7
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EXTEND
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# Page 1098
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WAND CHAN13 # SET WORD ORDER CODE TO ZERO
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TC Q # RETURN TO CALLER
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DODNPTR INDEX DNECADR # DNECADR CONTAINS ADRES OF SUBLIST
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0 0 # CLEAR AND ADD LIST ENTRY INTO A.
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CCS A # IS THIS A SNAPSHOT SUBLIST
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CA DNECADR # NO, IT IS A REGULAR SUBLIST.
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TCF DOSUBLST # A MUST NOT BE ZERO.
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XCH DNECADR # YES, IT IS A SNAPSHOT SUBLIST.
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TS SUBLIST # C(DNECADR) INTO SUBLIST
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CAF ZERO # A INTO A
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XCH TMINDEX # (NOTE.. TMINDEX = DNECADR)
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# THE FOLLOWING CODING (FROM SNAPLOOP TO SNAPEND)IS FOR THE PURPOSE OF TAKING A SNAPSHOT OF 12 DP REGISTERS.
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# THIS IS DONE BY SAVING 11 DP REGISTERS IN DNTMBUFF AND SENDING THE FIRST DP WORD IMMEDIATELY.
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# THE SNAPSHOT PROCESSING IS THE MOST TIME CONSUMING AND THEREFORE THE CODING AND LIST STRUCTURE WERE DESIGNED
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# TO MINIMIZE TIME. THE TIME OPTIMIZATION RESULTS IN RULES UNIQUE TO THE SNAPSHOT PORTION OF THE DOWNLIST.
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# THESE RULES ARE......
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# 1. ONLY 1DNADR'S CAN APPEAR IN THE SNAPSHOT SUBLIST
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# 2. THE 1DNADR'S CANNOT REFER TO THE FIRST LOCATION IN ANY BANK.
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SNAPLOOP TS EBANK # SET EBANK
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MASK LOW8 # ISOLATE RELATIVE ADDRESS
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EXTEND
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INDEX A
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EBANK= 1401
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DCA 1401 # PICK UP 2 SNAPSHOT WORDS.
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EBANK= DNTMBUFF
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INDEX TMINDEX
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DXCH DNTMBUFF # STORE 2 SNAPSHOT WORDS IN BUFFER
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INCR TMINDEX # SET BUFFER INDEX FOR NEXT 2 WORDS.
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INCR TMINDEX
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SNAPAGN INCR SUBLIST # SET POINTER TO NEXT 2 WORDS OF SNAPSHOT
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INDEX SUBLIST
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0 0 # = CA SSSS (SSSS = NEXT ENTRY IN SUBLIST)
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CCS A # TEST FOR LAST TWO WORDS OF SNAPSHOT.
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TCF SNAPLOOP # NOT LAST TWO.
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LDNPHAS2 GENADR DNPHASE2
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TS SUBLIST # YES, LAST. SAVE A.
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CA NEGONE # SET DNECADR AND
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TS DNECADR # SUBLIST POINTERS
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XCH SUBLIST # TO NEGATIVE VALUES.
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TS EBANK
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MASK LOW8
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EXTEND
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INDEX A
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EBANK= 1401
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# Page 1099
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DCA 1401 # PICK UP FIRST 2 WORDS OF SNAPSHOT.
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EBANK= DNTMBUFF
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SNAPEND TCF DNTMEXIT # NOW GO SEND THEM.
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FETCH2WD CA DNECADR
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TS EBANK # SET EBANK
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MASK LOW8 # ISOLATE RELATIVE ADDRESS
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TS L
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CA DNADRDCR # DECREMENT COUNT AND ECADR
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ADS DNECADR
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EXTEND
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INDEX L
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EBANK= 1400
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DCA 1400 # PICK UP 2 DATA WORDS
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EBANK= DNTMBUFF
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TCF DNTMEXIT # NOW GO SEND THEM.
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DOSUBLST TS SUBLIST # SET SUBLIST POINTER
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NEXTINSL INDEX SUBLIST
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0 0 # = CA SSSS (SSSS = NEXT ENTRY IN SUBLIST)
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CCS A # IS IT THE END OF THE SUBLIST
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INCR SUBLIST # NO-
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TCF +4
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TS SUBLIST # SAVE A.
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CA NEGONE # SET SUBLIST TO MINUS
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XCH SUBLIST # RETRIEVE A.
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+4 INCR A
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TS DNECADR # SAVE DNADR
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TCF SETWO +2 # GO USE COMMON CODING(PROBLEMS WOULD
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# OCCUR IF THE PROGRAM ENCOUNTERED A
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# DNPTR NOW)
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DNTMEXIT EXTEND # DOWN-TELEMETRY EXIT
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WRITE DNTM1 # TO SEND A + L TO CHANNELS 34 + 35
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CA L # RESPECTIVELY
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TMEXITL EXTEND
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WRITE DNTM2
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TMRESUME TCF RESUME # EXIT TELEMETRY PROGRAM VIA RESUME.
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MINB12 EQUALS -1/8
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DNECADR EQUALS TMINDEX
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CTLIST EQUALS LDATALST
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SUBLIST EQUALS DNQ
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# Page 1100
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# SUBROUTINE NAME- DNDUMP
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# FUNCTIONAL DESCRIPTION - TO SEND(DUMP) ALL ERASABLE STORAGE 'N' TIMES.(N = 1 TO 4). BANKS ARE SENT ONE AT A TIME
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# EACH BANK IS PRECEDED BY AN ID WORD, SYNCH BITS, ECADR AND TIME1 FOLLOWED BY THE 256D WORDS OF EACH
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# EBANK. EBANKS ARE DUMPED IN ORDER(I.E. EBANK 0 FIRST, THEN EBANK1 ETC.)
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# CALLING SEQUENCE- THE GROUND OR ASTRONAUT BY KEYING V74E CAN INITIALIZE THE DUMP.
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# AFTER KEYING IN V74E THE CURRENT DOWNLIST WILL BE IMMEDIATELY TERMINATED AND THE DOWNLINK ERASABLE DUMP
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# WILL BEGIN.
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# ONCE INITIATED THE DOWNLINK ERASABLE DUMP CAN BE TERMINATED (AND INTERRUPTED DOWNLIST REINSTATED) ONLY
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# BY THE FOLLOWING:
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# 1. A FRESH START
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# 2. COMPLETION OF ALL DOWNLINK DUMPS REQUESTED (ACCORDING TO BITS SET IN DUMPCNT). NOTE THAT DUMPCNT
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# CAN BE ALTERED BY A V21N01.
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# 3. AND INVOLUNTARILY BY A RESTART.
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# NORMAL EXIT MODE- TCF DNPHASE1
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# ALARM OR ABORT MODE- NONE
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# *SUBROUTINES CALLED- NONE.
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# ERASABLE INITIALIZATION REQUIRED --
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# DUMPCNT OCT 20000 IF 4 COMPLETE ERASABLE DUMPS ARE DESIRED
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# DUMPCNT OCT 10000 IF 2 COMPLETE ERASABLE DUMPS ARE DESIRED
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# DUMPCNT OCT 04000 IF 1 COMPLETE ERASABLE DUMP IS DESIRED
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# DEBRIS- DUMPLOC, DUMPSW, DNTMGOTO, EBANK AND CENTRAL REGISTERS
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# TIMING- TIME (IN SECS) = ((NO.DUMPS)*(NO.EBANKS)* (WDSPEREBANK + NO.IDWDS)) / NO.WDSPERSEC
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# TIME (IN SECS) = ( 4 )*( 8 )* ( 256 + 4 ) / 100
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# THUS TIME (IN SECS TO SEND DUMP OF ERASABLE 4 TIMES VIA DOWNLINK) = 83.2 SECONDS
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#
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# STRUCTURE OF ONE EBANK AS IT IS SENT BY DOWNLINK PROGRAM-
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# (REMINDER-THIS ONLY DESCRIBES ONE OF THE 8 EBANKS X 4 (DUMPS) = 32 EBANKS WHICH WILL BE SENT BY DNDUMP)
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# DOWNLIST W
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# WORD TAKEN FROM CONTENTS OF EXAMPLE O COMMENTS
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#
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# 1 ERASID 0177X 0 DOWNLIST I.D. FOR DOWNLINK ERASABLE DUMP (X=7 CSM, 6 LM)
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# 2 LOWIDCOD 77340 1 DOWNLINK SYNCH BITS.(SAME ONE USED IN ALL OTHER DOWNLISTS)
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# 3 DUMPLOC 13400 1 (SEE NOTES ON DUMPLOC)1= 3RD ERAS DUMP, 3400=ECADR OF 5TH WD
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# 4 TIME1 14120 1 TIME IN CENTISECONDS
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# 5 FIRST WORD OF EBANK X 03400 1 IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1400 (ECADR 3400)
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# 6 2ND WORD OF EBANK X 00142 1 IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1401 (ECADR 3401)
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# 7. 3RD WORD OF EBANK X 00142 1 IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1402 (ECADR 3402)
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# . 1
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# . 1
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# . 1
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# 260D 256TH WORD OF EBANK X 03777 1 IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1777 (ECADR 3777)
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#
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# NOTE- DUMPLOC CONTAINS THE COUNTER AND ECADR FOR EACH WORD BEING SENT.
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# THE BIT STRUCTURE OF DUMPLOC IS FOLLOWS--
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# X = NOT USED
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# X ABC EEE RRRRRRRR ABC = ERASABLE DUMP COUNTER(I.E. ABC = 0,1,2, OR 3 WHICH MEANS THAT
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# COMPLETE ERASABLE DUMP NUMBER 1,2,3, OR 4 RESPECTIVELY IS IN PROGRESS)
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# EEE = EBANK BITS
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# RRRRRRRR = RELATIVE ADDRESS WITHIN AN EBANK.
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# Page 1101
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DNDUMPI CA ZERO # INITIALIZE DOWNLINK
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TS DUMPLOC # ERASABLE DUMP
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+2 TC SENDID # GO SEND ID AND SYNCH BITS
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CA LDNDUMP1 # SET DNTMGOTO
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TS DNTMGOTO # TO LOCATION FOR NEXT PASS
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CA TIME1 # PLACE TIME1
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XCH L # INTO L
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CA DUMPLOC # AND ECADR OF THIS EBANK INTO A
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TCF DNTMEXIT # SEND DUMPLOC AND TIME1
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LDNDUMP ADRES DNDUMP
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LDNDUMP1 ADRES DNDUMP1
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DNDUMP CA TWO # INCREMENT ECADR IN DUMPLOC
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ADS DUMPLOC # TO NEXT DP WORD TO BE
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MASK LOW8 # DUMPED AND SAVE IT.
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CCS A # IS THIS THE BEGINNING OF A NEW EBANK
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TCF DNDUMP2 # NO- THEN CONTINUE DUMPING
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CA DUMPLOC # YES- IS THIS THE END OF THE
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MASK DUMPCNT # N TH(N = 1 TO 4) COMPLETE ERASABLE
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MASK PRIO34 # DUMP(BIT14 FOR 4, BIT13 FOR 2 OR BIT12
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CCS A # FOR 1 COMPLETE ERASABLE DUMP(S)).
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TCF DNPHASE1 # YES- START SENDING INTERRUPTED DOWNLIST
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# AGAIN
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TCF DNDUMPI +2 # NO- GO BACK AND INITIALIZE NEXT BANK
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DNDUMP1 CA LDNDUMP # SET DNTMGOTO
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TS DNTMGOTO # FOR WORDS 3 TO 256D OF CURRENT EBANK
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DNDUMP2 CA DUMPLOC
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TS EBANK # SET EBANK
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MASK LOW8 # ISOLATE RELATIVE ADDRESS.
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TS Q # (NOTE: MASK INSTRUCTION IS USED TO PICK
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CA NEG0 # UP ERASABLE REGISTERS SO THAT EDITING
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TS L # REGISTERS 20-23 WILL NOT BE ALTERED.)
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INDEX Q
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EBANK= 1400 # PICK UP LOW ORDER REGISTER OF PAIR
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MASK 1401 # OF ERASABLE REGISTERS.
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XCH L
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INDEX Q # PICK UP HIGH ORDER REGISTER OF PAIR
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MASK 1400 # OF ERASABLE REGISTERS.
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EBANK= DNTMBUFF
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TCF DNTMEXIT # GO SEND THEM
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SENDID EXTEND # **ENTRANCE USED BY ERASABLE DUMP PROG.**
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QXCH DNTMGOTO # SET DNTMGOTO SO NEXT TIME PROG WILL GO
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CAF ERASID # TO LOCATION FOLLOWING :TC SENDID:
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TS L # **ENTRANCE USED BY REGULAR DOWNLINK PG**
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# Page 1102
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TC WOZERO # GO SET WORD ORDER CODE TO ZERO
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CAF LOWIDCOD # PLACE SPECIAL ID CODE INTO L
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XCH L # AND ID BACK INTO A
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TCF DNTMEXIT # SEND DOWNLIST ID CODE(S).
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