# Copyright: Public domain. # Filename: DOWN-TELEMETRY_PROGRAM.agc # Purpose: Part of the source code for Comanche, build 055. It # is part of the source code for the Command Module's # (CM) Apollo Guidance Computer (AGC), Apollo 11. # Assembler: yaYUL # Reference: pp. 1093-1102 # Contact: Ron Burkey # Website: http://www.ibiblio.org/apollo. # Mod history: 2009-05-08 RSB Adapted from Colossus249/ file of same name # and page images. Corrected various typos # in the transcription of program comments, # and these should be back-ported to # Colossus249. # # The contents of the "Comanche055" files, in general, are transcribed # from scanned documents. # # Assemble revision 055 of AGC program Comanche by NASA # 2021113-051. April 1, 1969. # # This AGC program shall also be referred to as Colossus 2A # # Prepared by # Massachussets Institute of Technology # 75 Cambridge Parkway # Cambridge, Massachusetts # # under NASA contract NAS 9-4065. # # Refer directly to the online document mentioned above for further # information. Please report any errors to info@sandroid.org. # Page 1093 # 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 CHANGES 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 # TRANSITIONS (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 1094 # (No source on this page of the original assembly listing.) # Page 1095 # 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 TAGGES 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., IDNADRS): 377, 777, 1377, 1777, 2377, 2777, 3377, 3777. # (NOTE: TE TERM `EQUIVALENT' MEANT THAT THE IDNADR TO 6DNADR WILL BE PROCESSED LIKE 1 TO 6 ECADRS) # 3. CONTROL LISTS AND SUBLISTS CANNOT HAVE ENTRIES = OCTAL 00000 OR OCTAL 77777 # Page 1096 # 4. THE `1DNADR TIME2' WHICH WILL CAUSE THE DOWNLINT 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 05/DPROG DODOWNTM TS BANKRUPT EXTEND QXCH QRUPT # SAVE Q CA BIT7 # SET WORD ORDER CODE TO 1. EXCEPTION: AT EXTEND # THE BEGINNING OF EACH LIST THE WORD WOR CHAN13 # CODE WILL BE SET BACK TO 0. 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 # Page 1097 TCF NEXTINSL # YES 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 # Page 1098 WAND CHAN13 # SET WORD ORDER CODE TO ZERO 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 # Page 1099 DCA 1401 # PICK UP FIRST 2 WORDS OF SNAPSHOT. EBANK= DNTMBUFF SNAPEND TCF DNTMEXIT # NOW GO 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 (PROBLEMS 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 TELEMTRY PROGRAM VIA RESUME. MINB12 EQUALS -1/8 DNECADR EQUALS TMINDEX CTLIST EQUALS LDATALST SUBLIST EQUALS DNQ # Page 1100 # SUBROUTINE NAME -- DNDUMP # # FUNCTIONAL DESCRIPTION -- TO SEND (DUMP) ALL 8 BANKS OF ERASABLE STORAGE TWICE. 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 1101 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 -- SEND DOWNLIST AGAIN # AGAIN TCF DNDUMPI +2 # NO -- GO BACK AND INITIALZE 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 TO 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 1102 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).