Source Code
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These source-code files are part of a reconstructed copy of Luminary 97, the
original release of the Apollo 11 Lunar Module (LM) Apollo Guidance Computer
(AGC) software.
The reconstruction began with source code of Luminary 99 revision 1 previously
transcribed from a digitized copy of that program. The code was then updated
by undoing changes described in original Luminary memos 83 and 85, using asterisks
indicating changed lines in the listing as a guide. The reconstruction was
verified by matching memory-bank checksums to those listed in drawing 2021152D.
Note that page numbers in the reconstructed code match those on the Luminary 099
revision 001 printout, although the added code would likely have changed page
numbers for a real Luminary 97 listing.
Comments from the original source code are prefixed with a single '#' symbol,
whereas comments added later are prefixed by "##" or "###". Report any errors
noted by creating an
issue report at the Virtual AGC
project's GitHub repository.
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042257,000002: ## Copyright: Public domain.
042258,000003: ## Filename: DOWN-TELEMETRY_PROGRAM.agc
042259,000004: ## Purpose: A section of Luminary revision 97.
042260,000005: ## It is part of the reconstructed source code for the
042261,000006: ## original release of the flight software for the Lunar
042262,000007: ## Module's (LM) Apollo Guidance Computer (AGC) for Apollo 11.
042263,000008: ## The code has been recreated from a copy of Luminary 99
042264,000009: ## revision 001, using asterisks indicating changed lines in
042265,000010: ## the listing and Luminary Memos #83 and #85, which list
042266,000011: ## changes between Luminary 97 and 98, and 98 and 99. The
042267,000012: ## code has been adapted such that the resulting bugger words
042268,000013: ## exactly match those specified for Luminary 97 in NASA drawing
042269,000014: ## 2021152D, which gives relatively high confidence that the
042270,000015: ## reconstruction is correct.
042271,000016: ## Reference: pp. 988-997
042272,000017: ## Assembler: yaYUL
042273,000018: ## Contact: Ron Burkey <info@sandroid.org>.
042274,000019: ## Website: www.ibiblio.org/apollo/index.html
042275,000020: ## Mod history: 2019-07-28 MAS Created from Luminary 99. Removed coding related
042276,000021: ## to WOTEST, which was introduced in Luminary 98.
042277,000022:
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Page 988
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042279,000024: # PROGRAM NAME - DOWN TELEMETRY PROGRAM
042280,000025: # MOD NO. - 0 TO COMPLETELY REWRITE THE DOWN TELEMETRY PROGRAM AND DOWNLINK ERASABLE DUMP PROGRAM FOR THE
042281,000026: # PURPOSE OF SAVING APPROXIMATELY 150 WORDS OF CORE STORAGE.
042282,000027: # THIS CHANGE REQUIRES AN ENTIRELY NEW METHOD OF SPECIFYING DOWNLINK LISTS. REFER TO DOWNLINK
042283,000028: # LISTS LOG SECTION FOR MORE DETAILS. HOWEVER THIS CHANGE WILL NOT AFFECT THE GROUND PROCESSING
042284,000029: # OF DOWN TELEMETRY DATA.
042285,000030: # MOD BY - KILROY, SMITH, DEWITT
042286,000031: # DATE - 02 OCT 67
042287,000032: # AUTHORS - KILROY, SMITH, DEWITT, DEWOLF, FAGIN
042288,000033: # LOG SECTION - DOWN-TELEMETRY PROGRAM
042289,000034:
042290,000035: # FUNCTIONAL DESCRIPTION - THIS ROUTINE IS INITIATED BY TELEMETRY END
042291,000036: # PULSE FROM THE DOWNLINK TELEMETRY CONVERTER. THIS PULSE OCCURS
042292,000037: # AT 50 TIMES PER SEC (EVERY 20 MS) THEREFORE DODOWNTM IS
042293,000038: # EXECUTED AT THESE RATES. THIS ROUTINE SELECTS THE APPROPRIATE
042294,000039: # AGC DATA TO BE TRANSMITTED DOWNLINK AND LOADS IT INTO OUTPUT
042295,000040: # CHANNELS 34 AND 35. THE INFORMATION IS THEN GATED OUT FROM THE
042296,000041: # LGC IN SERIAL FASHION.
042297,000042:
042298,000043: # THIS PROGRAM IS CODED FOR A 2 SECOND DOWNLIST. SINCE DOWNRUPTS
042299,000044: # OCCUR EVERY 20 MS AND 2 AGC COMPUTER WORDS CAN BE PLACED IN
042300,000045: # CHANNELS 34 AND 35 DURING EACH DOWNRUPT THE PROGRAM IS CAPABLE
042301,000046: # OF SENDING 200 AGC WORDS EVERY 2 SECONDS.
042302,000047:
042303,000048: # CALLING SEQUENCE - NONE
042304,000049: # PROGRAM IS ENTERED VIA TCF DODOWNTM WHICH IS EXECUTED AS A
042305,000050: # RESULT OF A DOWNRUPT. CONTROL IS RETURNED VIA TCF RESUME WHICH
042306,000051: # IN EFFECT IS A RESUME.
042307,000052:
042308,000053: # SUBROUTINES CALLED - NONE
042309,000054:
042310,000055: # NORMAL EXIT MODE - TCF RESUME
042311,000056:
042312,000057: # ALARM OR ABORT EXIT MODE - NONE
042313,000058:
042314,000059: # RESTART PROTECTION:
042315,000060: # ON A FRESH START AND RESTART THE 'STARTSUB' SUBROUTINE WILL INITIALIZE THE DOWNLIST POINTER (ACTUALLY
042316,000061: # DNTMGOTO) TO THE BEGINNING OF THE CURRENT DOWNLIST (I.E. CURRENT CONTENTS OF DNLSTADR). THIS HAS THE
042317,000062: # EFFECT OF IGNORING THE REMAINDER OF THE DOWNLIST WHICH THE DOWN-TELEMETRY PROGRAM WAS WORKING ON WHEN
042318,000063: # THE RESTART (OR FRESH START) OCCURRED AND RESUME DOWN TELEMETRY FROM THE BEGINNING OF THE CURRENT
042319,000064: # DOWNLIST.
042320,000065:
042321,000066: # ALSO OF INTEREST IS THE FACT THAT ON A RESTART THE AGC WILL ZERO DOWNLINK CHANNELS 13, 34 AND 35.
042322,000067:
042323,000068: # DOWNLINK LIST SELECTION:
042324,000069: # THE APPROPRIATE DOWNLINK LISTS ARE SELECTED BY THE FOLLOWING:
042325,000070: # 1. FRESH START
042326,000071: # 2. V37EXXE WHERE XX = THE MAJOR MODE BEING SELECTED.
042327,000072: # 3. UPDATE PROGRAM (P27)
042328,000073: # 4. NON-V37 SELECTABLE TYPE PROGRAMS (E.G. AGS INITIALIZATION (SUNDANCE, LUMINARY) AND P61-P62
042329,000074: # TRANSITION (COLOSSUS) ETC.).
042330,000075:
042331,000076: # DOWNLINK LIST RULES AND LIMITATIONS:
042332,000077: # READ SECTION(S) WHICH FOLLOW 'DEBRIS' WRITEUP.
042333,000078:
042334,000079: # OUTPUT - EVERY 2 SECONDS 100 DOUBLE PRECISION WORDS (I.E. 200 LGC
042335,000080: # COMPUTER WORDS) ARE TRANSMITTED VIA DOWNLINK.
042336,000081:
042337,000082: # ERASABLE INITIALIZATION REQUIRED - NONE
042338,000083: # 'DNTMGOTO' AND 'DNLSTADR' ARE INITIALIZED BY THE FRESH START PROGRAM.
042339,000084:
042340,000085: # DEBRIS (ERASABLE LOCATIONS DESTROYED BY THIS PROGRAM) -
042341,000086: # LDATALST, DNTMBUFF TO DNTMBUFF +21D, TMINDEX, DNQ.
042342,000087:
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Page 989
This page is empty
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042345,000090:
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Page 990
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042347,000092: # DODOWNTM IS ENTERED EVERY 20 MS BY AN INTERRUPT TRIGGERED BY THE
042348,000093: # RECEIPT OF AN ENDPULSE FROM THE SPACECRAFT TELEMETRY PROGRAMMER.
042349,000094:
042350,000095: # NOTES REGARDING DOWNLINK LISTS ASSOCIATED WITH THIS PROGRAM:
042351,000096: # 1. DOWNLISTS. - DOWNLISTS MUST BE COMPILED IN THE SAME BANK AS THE
042352,000097: # DOWN-TELEMETRY PROGRAM. THIS IS DONE FOR EASE OF CODING, FASTER
042353,000098: # EXECUTION.
042354,000099: # 2. EACH DOWNLINK LIST CONSISTS OF A CONTROL LIST AND A NUMBER OF
042355,000100: # SUBLISTS.
042356,000101: # 3. A SUBLIST REFERS TO A SNAPSHOT OR DATA COMMON TO THE SAME OR OTHER
042357,000102: # DOWNLINK LISTS. ANY SUBLIST CONTAINING COMMON DATA NEEDS TO BE
042358,000103: # CODED ONLY ONCE FOR THE APPLICABLE DOWNLINK LISTS.
042359,000104: # 4. SNAPSHOT SUBLISTS REFER SPECIFICALLY TO HOMOGENOUS DATA WHICH MUST BE
042360,000105: # SAVED IN A BUFFER DURING ONE DOWNRUPT.
042361,000106: # 5. THE 1DNADR FOR THE 1ST WORD OF SNAPSHOT DATA IS FOUND AT THE END
042362,000107: # OF EACH SNAPSHOT SUBLIST, SINCE THE PROGRAM CODING SENDS THIS DP WORD
042363,000108: # IMMEDIATELY AFTER STORING THE OTHERS IN THE SNAPSHOT BUFFER.
042364,000109: # 6. ALL LISTS ARE COMBINATIONS OF CODED ERASABLE ADDRESS CONSTANTS
042365,000110: # CREATED FOR THE DOWNLIST PROGRAM.
042366,000111: # A. 1DNADR 1-WORD DOWNLIST ADDRESS.
042367,000112: # SAME AS ECADR, BUT USED WHEN THE WORD ADDRESSED IS THE LEFT
042368,000113: # HALF OF A DOUBLE-PRECISION WORD FOR DOWN TELEMETRY.
042369,000114: # B. 2DNADR - 6DNADR N-WORD DOWNLIST ADDRESS, N = 2 - 6.
042370,000115: # SAME AS 1DNADR, BUT WITH THE 4 UNUSED BITS OF THE ECADR FORMAT
042371,000116: # FILLED IN WITH 0001-0101. USED TO POINT TO A LIST OF N DOUBLE-
042372,000117: # PRECISION WORDS, STORED CONSECUTIVELY, FOR DOWN TELEMETRY.
042373,000118: # C. DNCHAN DOWNLIST CHANNEL ADDRESS.
042374,000119: # SAME AS 1DNADR, BUT WITH PREFIX BITS 0111. USED TO POINT TO
042375,000120: # A PAIR OF CHANNELS FOR DOWN TELEMETRY.
042376,000121: # D. DNPTR DOWN TELEMETRY SUBLIST POINTER.
042377,000122: # SAME AS CAF BUT TAGGED AS A CONSTANT. USED IN CONTROL LIST TO POINT TO A SUBLIST.
042378,000123: # CAUTION --- A DNPTR CANNOT BE USED IN A SUBLIST.
042379,000124: # 7. THE WORD ORDER CODE IS SET TO ZERO AT THE BEGINNING OF EACH DOWNLIST (I.E. CONTROL LIST) AND WHEN
042380,000125: # A '1DNADR TIME2' IS DETECTED IN THE CONTROL LIST (ONLY).
042381,000126: # 8. IN THE SNAPSHOT SUBLIST ONLY, THE DNADR'S CANNOT POINT TO THE FIRST WORD OF ANY EBANK.
042382,000127:
042383,000128: # DOWNLINK LIST RESTRICTIONS:
042384,000129: # (THE FOLLOWING POINTS MAY BE LISTED ELSEWHERE BUT ARE LISTED HERE SO IT IS CLEAR THAT THESE THINGS CANNOT BE
042385,000130: # DONE)
042386,000131: # 1. SNAPSHOT DOWNLIST:
042387,000132: # (A) CANNOT CONTAIN THE FOLLOWING ECADRS (I.E. 1DNADR'S): 0, 400, 1000, 1400, 2000, 2400, 3000, 3400.
042388,000133: # (B) CAN CONTAIN ONLY 1DNADR'S
042389,000134: # 2. ALL DOWNLINKED DATA (EXCEPT CHANNELS) IS PICKED UP BY A <DCA<SO DOWNLINK LISTS CANNOT CONTAIN THE
042390,000135: # EQUIVALENT OF THE FOLLOWING ECADRS (I.E. IDNADRS): 377, 777, 1377, 1777, 2377, 27777, 3377, 3777.
042391,000136: # (NOTE: THE TERM EQUIVALENT ' MEANT THAT THE IDNADR TO 6DNADR WILL BE PROCESSED LIKE 1 TO 6 ECADRS)
042392,000137: # 3. CONTROL LISTS AND SUBLISTS CANNOT HAVE ENTRIES = OCTAL 00000 OR OCTAL 77777
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Page 991
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042394,000139: # 4. THE '1DNADR TIME2' WHICH WILL CAUSE THE DOWNLINK PROGRAM TO SET THE WORDER CODE TO 3 MUST APPEAR IN THE
042395,000140: # CONTROL SECTION OF THE DOWNLIST.
042396,000141: # 5. 'DNCHAN 0' CANNOT BE USED.
042397,000142: # 6. 'DNPTR 0' CANNOT BE USED.
042398,000143: # 7. DNPTR CANNOT APPEAR IN A SUBLIST.
042399,000144:
042400,000145: # EBANK SETTINGS
042401,000146: # IN THE PROCESS OF SETTING THE EBANK (WHEN PICKING UP DOWNLINK DATA) THE DOWN TELEMETRY PROGRAM PUTS
042402,000147: # 'GARBAGE' INTO BITS15-12 OF EBANK. HUGH BLAIR-SMITH WARNS US THAT BITS15-12 OF EBANK MAY BECOME
042403,000148: # SIGNIFICANT SOMEDAY IN THE FUTURE. IF/WHEN THAT HAPPENS, THE PROGRAM SHOULD INSURE (BY MASKING ETC.)
042404,000149: # THAT BITS 15-12 OF EBANK ARE ZERO.
042405,000150:
042406,000151: # INITIALIZATION REQUIRED - TO INTERRUPT CURRENT LIST AND START A NEW ONE..
042407,000152: # 1. ADRES OF DOWNLINK LIST INTO DNLSTADR
042408,000153: # 2. NEGONE INTO SUBLIST
042409,000154: # 3. NEGONE INTO DNECADR
042410,000155:
042411,000156: 22,3711 BANK 22
042412,000157: 05,2000 SETLOC DOWNTELM
042413,000158: 05,2000 BANK
042414,000159:
042415,000160: 05,3506 0340 EBANK= DNTMBUFF
042416,000161:
042417,000162: 05,3506 COUNT* $$/DPROG
042418,000163: 05,3506 54016 DODOWNTM TS BANKRUPT
042419,000164: 05,3507 00006 EXTEND
042420,000165: 05,3510 22012 QXCH QRUPT # SAVE Q
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In Luminary 98, the following instruction was changed to jump to a piece
of code to check whether or not it is time to write the word order bit.
This was done to decrease the write frequency.
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042424,000169: 05,3511 34745 CA BIT7 # SET WORD ORDER CODE TO 1. EXCEPTION- AT
042425,000170: 05,3512 00006 WO1 EXTEND # THE BEGINNING OF EACH LIST THE WORD
042426,000171: 05,3513 05013 WOR CHAN13 # CODE WILL BE SET BACK TO 0.
042427,000172: 05,3514 00335 TC DNTMGOTO # GOTO APPROPRIATE PHASE OF PROGRAM
042428,000173:
042429,000174: 05,3515 37747 DNPHASE1 CA NEGONE # INITIALIZE ALL CONTROL WORDS
042430,000175: 05,3516 54337 TS SUBLIST # WORDS TO MINUS ONE
042431,000176: 05,3517 54336 TS DNECADR
042432,000177: 05,3520 33640 CA LDNPHAS2 # SET DNTMGOTO =O ALL SUBSEQUENT DOWNRUPTS
042433,000178: 05,3521 54335 TS DNTMGOTO # GO TO DNPHASE2
042434,000179: 05,3522 13536 TCF NEWLIST
042435,000180: 05,3523 10336 DNPHASE2 CCS DNECADR # SENDING OF DATA IN PROGRESS
042436,000181: 05,3524 03653 DODNADR TC FETCH2WD # YES - THEN FETCH THE NEXT 2 SP WORDS
042437,000182: 05,3525 77753 MINTIME2 -1DNADR TIME2 # NEGATIVE OF TIME2 1DNADR
042438,000183: 05,3526 13527 TCF +1 # (ECADR OF 3776 + 74001 = 77777)
042439,000184:
042440,000185: 05,3527 10337 CCS SUBLIST # IS THE SUBLIST IN CONTROL
042441,000186: 05,3530 13666 TCF NEXTINSL # YES
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Page 992
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042443,000188: 05,3531 74001 DNADRDCR OCT 74001 # DNADR COUNT AND ECADR DECREMENTER
042444,000189:
042445,000190: 05,3532 30334 CHKLIST CA CTLIST
042446,000191: 05,3533 00006 EXTEND
042447,000192: 05,3534 63536 BZMF NEWLIST # IT WILL BE NEGATIVE AT END OF LIST
042448,000193: 05,3535 13543 TCF NEXTINCL
042449,000194: 05,3536 50332 NEWLIST INDEX DNLSTCOD
042450,000195: 05,3537 32441 CA DNTABLE # INITIALIZE CTLIST WITH
042451,000196: 05,3540 54334 TS CTLIST # STARTING ADDRESS OF NEW LIST
042452,000197: 05,3541 40332 CS DNLSTCOD
042453,000198: 05,3542 13756 TCF SENDID +3
042454,000199: 05,3543 50334 NEXTINCL INDEX CTLIST
042455,000200: 05,3544 30000 CA 0
042456,000201: 05,3545 10000 CCS A
042457,000202: 05,3546 24334 INCR CTLIST # SET POINTER TO PICK UP NEXT CTLIST WORD
042458,000203: 05,3547 13553 TCF +4 # ON NEXT ENTRY TO PROG. (A SHOULD NOT =0)
042459,000204: 05,3550 56334 XCH CTLIST # SET CTLIST TO NEGATIVE AND PLACE(CODING)
042460,000205: 05,3551 40000 COM # UNCOMPLEMENTED DNADR INTO A. (FOR LA)
042461,000206: 05,3552 56334 XCH CTLIST # (ST IN )
042462,000207: 05,3553 24000 +4 INCR A # (CTLIST)
042463,000208: 05,3554 54336 TS DNECADR # SAVE DNADR
042464,000209: 05,3555 63525 AD MINTIME2 # TEST FOR TIME2 (NEG. OF ECADR)
042465,000210: 05,3556 10000 CCS A
042466,000211: 05,3557 13563 TCF SETWO +1 # DON'T SET WORD ORDER CODE
042467,000212: 05,3560 47777 MINB1314 OCT 47777 # MINUS BIT 13 AND 14 (CAN'T GET HERE)
042468,000213: 05,3561 13563 TCF SETWO +1 # DON'T SET WORD ORDER CODE
042469,000214: 05,3562 03605 SETWO TC WOZERO # GO SET WORD ORDER CODE TO ZERO.
042470,000215: 05,3563 30336 +1 CA DNECADR # RELOAD A WITH THE DNADR.
042471,000216: 05,3564 63560 +2 AD MINB1314 # IS THIS A REGULAR DNADR?
042472,000217: 05,3565 00006 EXTEND
042473,000218: 05,3566 63653 BZMF FETCH2WD # YES. (A MUST NEVER BE ZERO)
042474,000219: 05,3567 67741 AD MINB12 # NO- IS IT A POINTER (DNPTR) OR A
042475,000220: 05,3570 00006 EXTEND # CHANNEL(DNCHAN)
042476,000221: 05,3571 63611 BZMF DODNPTR # IT'S A POINTER. (A MUST NEVER BE ZERO)
042477,000222:
042478,000223: 05,3572 00006 DODNCHAN TC 6 # (EXECUTED AS EXTEND) IT S A CHANNEL
042479,000224: 05,3573 50336 INDEX DNECADR
042480,000225: 05,3574 44000 INDEX 0 -4000 # (EXECUTED AS READ)
042481,000226: 05,3575 54001 TS L
042482,000227: 05,3576 00006 TC 6 # (EXECUTED AS EXTEND)
042483,000228: 05,3577 50336 INDEX DNECADR
042484,000229: 05,3600 43777 INDEX 0 -4001 # (EXECUTED AS READ)
042485,000230: 05,3601 54336 TS DNECADR # SET DNECADR
042486,000231: 05,3602 37747 CA NEGONE # TO MINUS
042487,000232: 05,3603 56336 XCH DNECADR # WHILE PRESERVING A.
042488,000233: 05,3604 13701 TCF DNTMEXIT # GO SEND CHANNELS
042489,000234:
042490,000235: 05,3605 44745 WOZERO CS BIT7
042491,000236: 05,3606 00006 EXTEND
042492,000237: 05,3607 03013 WAND CHAN13 # SET WORD ORDER CODE TO ZERO
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Page 993
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042494,000239: 05,3610 00002 TC Q # RETURN TO CALLER
042495,000240:
042496,000241: 05,3611 50336 DODNPTR INDEX DNECADR # DNECADR CONTAINS ADRES OF SUBLIST
042497,000242: 05,3612 00000 0 0 # CLEAR AND ADD LIST ENTRY INTO A.
042498,000243: 05,3613 10000 CCS A # IS THIS A SNAPSHOT SUBLIST
042499,000244: 05,3614 30336 CA DNECADR # NO, IT IS A REGULAR SUBLIST.
042500,000245: 05,3615 13665 TCF DOSUBLST # A MUST NOT BE ZERO.
042501,000246:
042502,000247: 05,3616 56336 XCH DNECADR # YES, IT IS A SNAPSHOT SUBLIST.
042503,000248: 05,3617 54337 TS SUBLIST # C(DNECADR) INTO SUBLIST
042504,000249: 05,3620 34755 CAF ZERO # A INTO A
042505,000250: 05,3621 56336 XCH TMINDEX # (NOTE.. TMINDEX = DNECADR)
042506,000251:
042507,000252: # THE FOLLOWING CODING (FROM SNAPLOOP TO SNAPEND) IS FOR THE PURPOSE OF TAKING A SNAPSHOT OF 12 DP REGISTERS.
042508,000253: # THIS IS DONE BY SAVING 11 DP REGISTERS IN DNTMBUFF AND SENDING THE FIRST DP WORD IMMEDIATELY.
042509,000254: # THE SNAPSHOT PROCESSING IS THE MOST TIME CONSUMING AND THEREFORE THE CODING AND LIST STRUCTURE WERE DESIGNED
042510,000255: # TO MINIMIZE TIME. THE TIME OPTIMIZATION RESULTS IN RULES UNIQUE TO THE SNAPSHOT PORTION OF THE DOWNLIST.
042511,000256: # THESE RULES ARE ......
042512,000257: # 1. ONLY 1DNADR'S CAN APPEAR IN THE SNAPSHOT SUBLIST
042513,000258: # 2. THE 1DNADR'S CANNOT REFER TO THE FIRST LOCATION IN ANY BANK.
042514,000259:
042515,000260: 05,3622 54003 SNAPLOOP TS EBANK # SET EBANK
042516,000261: 05,3623 74357 MASK LOW8 # ISOLATE RELATIVE ADDRESS
042517,000262: 05,3624 00006 EXTEND
042518,000263: 05,3625 50000 INDEX A
042519,000264: 05,3626 E3,1401 EBANK= 1401
042520,000265: 05,3626 31402 DCA 1401 # PICK UP 2 SNAPSHOT WORDS.
042521,000266: 05,3627 0340 EBANK= DNTMBUFF
042522,000267: 05,3627 50336 INDEX TMINDEX
042523,000268: 05,3630 52341 DXCH DNTMBUFF # STORE 2 SNAPSHOT WORDS IN BUFFER
042524,000269: 05,3631 24336 INCR TMINDEX # SET BUFFER INDEX FOR NEXT 2 WORDS.
042525,000270: 05,3632 24336 INCR TMINDEX
042526,000271: 05,3633 24337 SNAPAGN INCR SUBLIST # SET POINTER TO NEXT 2 WORDS OF SNAPSHOT
042527,000272: 05,3634 50337 INDEX SUBLIST
042528,000273: 05,3635 00000 0 0 # = CA SSSS (SSSS = NEXT ENTRY IN SUBLIST)
042529,000274: 05,3636 10000 CCS A # TEST FOR LAST TWO WORDS OF SNAPSHOT.
042530,000275: 05,3637 13622 TCF SNAPLOOP # NOT LAST TWO.
042531,000276: 05,3640 03523 LDNPHAS2 GENADR DNPHASE2
042532,000277: 05,3641 54337 TS SUBLIST # YES, LAST. SAVE A.
042533,000278: 05,3642 37747 CA NEGONE # SET DNECADR AND
042534,000279: 05,3643 54336 TS DNECADR # SUBLIST POINTERS
042535,000280: 05,3644 56337 XCH SUBLIST # TO NEGATIVE VALUES.
042536,000281: 05,3645 54003 TS EBANK
042537,000282: 05,3646 74357 MASK LOW8
042538,000283: 05,3647 00006 EXTEND
042539,000284: 05,3650 50000 INDEX A
042540,000285: 05,3651 E3,1401 EBANK= 1401
042541,000286: 05,3651 31402 DCA 1401 # PICK UP FIRST 2 WORDS OF SNAPSHOT.
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Page 994
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042543,000288: 05,3652 0340 EBANK= DNTMBUFF
042544,000289: 05,3652 13701 SNAPEND TCF DNTMEXIT # NOW GO SEND THEM.
042545,000290:
042546,000291: 05,3653 30336 FETCH2WD CA DNECADR
042547,000292: 05,3654 54003 TS EBANK # SET EBANK
042548,000293: 05,3655 74357 MASK LOW8 # ISOLATE RELATIVE ADDRESS
042549,000294: 05,3656 54001 TS L
042550,000295: 05,3657 33531 CA DNADRDCR # DECREMENT COUNT AND ECADR
042551,000296: 05,3660 26336 ADS DNECADR
042552,000297: 05,3661 00006 EXTEND
042553,000298: 05,3662 50001 INDEX L
042554,000299: 05,3663 E3,1400 EBANK= 1400
042555,000300: 05,3663 31401 DCA 1400 # PICK UP 2 DATA WORDS
042556,000301: 05,3664 0340 EBANK= DNTMBUFF
042557,000302: 05,3664 13701 TCF DNTMEXIT # NOW GO SEND THEM.
042558,000303:
042559,000304: 05,3665 54337 DOSUBLST TS SUBLIST # SET SUBLIST POINTER
042560,000305: 05,3666 50337 NEXTINSL INDEX SUBLIST
042561,000306: 05,3667 00000 0 0 # = CA SSSS (SSSS = NEXT ENTRY IN SUBLIST)
042562,000307: 05,3670 10000 CCS A # IS IT THE END OF THE SUBLIST
042563,000308: 05,3671 24337 INCR SUBLIST # NO -
042564,000309: 05,3672 13676 TCF +4
042565,000310: 05,3673 54337 TS SUBLIST # SAVE A.
042566,000311: 05,3674 37747 CA NEGONE # SET SUBLIST TO MINUS
042567,000312: 05,3675 56337 XCH SUBLIST # RETRIEVE A.
042568,000313: 05,3676 24000 +4 INCR A
042569,000314: 05,3677 54336 TS DNECADR # SAVE DNADR
042570,000315: 05,3700 13564 TCF SETWO +2 # GO USE COMMON CODING (PROBLEMS WOULD
042571,000316: # OCCUR IF THE PROGRAM ENCOUNTERED A
042572,000317: # DNPTR NOW)
042573,000318:
042574,000319: 05,3701 00006 DNTMEXIT EXTEND # DOWN-TELEMETRY EXIT
042575,000320: 05,3702 01034 WRITE DNTM1 # TO SEND A + L TO CHANNELS 34 + 35
042576,000321: 05,3703 30001 CA L # RESPECTIVELY
042577,000322: 05,3704 00006 TMEXITL EXTEND
042578,000323: 05,3705 01035 WRITE DNTM2
042579,000324: 05,3706 15270 TMRESUME TCF RESUME # EXIT TELEMETRY PROGRAM VIA RESUME.
042580,000325:
042581,000326: 05,3707 7741 MINB12 EQUALS -1/8
042582,000327: 05,3707 0336 DNECADR EQUALS TMINDEX
042583,000328: 05,3707 0334 CTLIST EQUALS LDATALST
042584,000329: 05,3707 0337 SUBLIST EQUALS DNQ
042585,000330:
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Page 995
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042587,000332: # SUBROUTINE NAME - DNDUMP
042588,000333:
042589,000334: # FUNCTIONAL DESCRIPTION - TO SEND (DUMP) ALL ERASABLE STORAGE 'N' TIMES. (N=1 TO 4). BANKS ARE SENT ONE AT A TIME
042590,000335: # EACH BANK IS PRECEEDED BY AN ID WORD, SYNCH BITS, ECADR AND TIME1 FOLLOWED BY THE 256D WORDS OF EACH
042591,000336: # EBANK. EBANKS ARE DUMPED IN ORDER (I.E. EBANK 0 FIRST, THEN EBANK1 ETC.)
042592,000337:
042593,000338: # CALLING SEQUENCE - THE GROUND OR ASTRONAUT BY KEYING V74E CAN INITIALIZE THE DUMP.
042594,000339: # AFTER KEYING IN V74E THE CURRENT DOWNLIST WILL BE IMMEDIATELY TERMINATED AND THE DOWNLINK ERASABLE DUMP
042595,000340: # WILL BEGIN.
042596,000341:
042597,000342: # ONCE INITIATED THE DOWNLINK ERASABLE DUMP CAN BE TERMINATED (AND INTERRUPTED DOWNLIST REINSTATED) ONLY
042598,000343: # BY THE FOLLOWING:
042599,000344:
042600,000345: # 1. A FRESH START
042601,000346: # 2. COMPLETION OF ALL DOWNLINK DUMPS REQUESTED (ACCORDING TO BITS SET IN DUMPCNT). NOTE THAT DUMPCNT
042602,000347: # CAN BE ALTERED BY A V21N01.
042603,000348: # 3. AND INVOLUNTARILY BY A RESTART.
042604,000349:
042605,000350: # NORMAL EXIT MODE - TCF DNPHASE1
042606,000351:
042607,000352: # ALARM OR ABORT MODE - NONE
042608,000353:
042609,000354: # *SUBROUTINES CALLED - NONE.
042610,000355:
042611,000356: # ERASABLE INITIALIZATION REQUIRED -
042612,000357: # DUMPCNT OCT 20000 IF 4 COMPLETE ERASABLE DUMPS ARE DESIRED
042613,000358: # DUMPCNT OCT 10000 IF 2 COMPLETE ERASABLE DUMPS ARE DESIRED
042614,000359: # DUMPCNT OCT 04000 IF 1 COMPLETE ERASABLE DUMP IS DESIRED
042615,000360:
042616,000361: # DEBRIS - DUMPLOC, DUMPSW, DNTMGOTO, EBANK AND CENTRAL REGISTERS
042617,000362:
042618,000363: # TIMING - TIME (IN SECS) = ((NO.DUMPS)*(NO.EBANKS)*(WDSPEREBANK + NO.IDWDS)) / NO.WDSPERSEC
042619,000364: # TIME (IN SECS) = ( 4 )*( 8 )*( 256 + 4 ) / 100
042620,000365: # THUS TIME (IN SECS TO SEND DUMP OF ERASABLE 4 TIMES VIA DOWNLINK) = 83.2 SECONDS
042621,000366:
042622,000367: # STRUCTURE OF ONE EBANK AS IT IS SENT BY DOWNLINK PROGRAM -
042623,000368: # (REMINDER - THIS ONLY DESCRIBES ONE OF THE 8 EBANKS X 4 (DUMPS) = 32 EBANKS WHICH WILL BE SENT BY DNDUMP)
042624,000369: # DOWNLIST W
042625,000370: # WORD TAKEN FROM CONTENTS OF EXAMPLE O COMMENTS
042626,000371: # 1 ERASID 0177X 0 DOWNLIST I.D. FOR DOWNLINK ERASABLE DUMP (X=7 CSM, 6 LM)
042627,000372: # 2 LOWIDCOD 77340 1 DOWNLINK SYNCH BITS. (SAME ONE USED IN ALL OTHER DOWNLISTS)
042628,000373: # 3 DUMPLOC 13400 1 (SEE NOTES ON DUMPLOC) 1 = 3RD ERAS DUMP, 3400=ECADR OF 5TH WD
042629,000374: # 4 TIME1 14120 1 TIME IN CENTISECONDS
042630,000375: # 5 FIRST WORD OF EBANK X 03400 1 IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1400 (ECADR 3400)
042631,000376: # 6 2ND WORD OF EBANK X 00142 1 IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1401 (ECADR 3401)
042632,000377: # 7 3RD WORD OF EBANK X 00142 1 IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1402 (ECADR 3402)
042633,000378: # . 1
042634,000379: # . 1
042635,000380: # . 1
042636,000381: # 260D 256TH WORD OF EBANK X 03777 1 IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1777 (ECADR 3777)
042637,000382:
042638,000383: # NOTE - DUMPLOC CONTAINS THE COUNTER AND ECADR FOR EACH WORD BEING SENT.
042639,000384: # THE BIT STRUCTURE OF DUMPLOC IS FOLLOWS---
042640,000385: # X = NOT USED
042641,000386: # X ABC EEE RRRRRRRR ABC = ERASABLE DUMP COUNTER (I.E. ABC = 0,1,2 OR 3 WHICH MEANS THAT
042642,000387: # COMPLETE ERASABLE DUMP NUMBER 1,2,3 OR 4 RESPECTIVELY IS IN PROGRESS)
042643,000388: # EEE = EBANK BITS
042644,000389: # RRRRRRRR = RELATIVE ADDRESS WITHIN AN EBANK.
042645,000390:
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Page 996
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042647,000392: 05,3707 34755 DNDUMPI CA ZERO # INITIALIZE DOWNLINK
042648,000393: 05,3710 54336 TS DUMPLOC # ERASABLE DUMP
042649,000394: 05,3711 03753 +2 TC SENDID # GO SEND ID AND SYNCH BITS
042650,000395: 05,3712 33721 CA LDNDUMP1 # SET DNTMGOTO
042651,000396: 05,3713 54335 TS DNTMGOTO # TO LOCATION FOR NEXT PASS
042652,000397: 05,3714 30025 CA TIME1 # PLACE TIME1
042653,000398: 05,3715 56001 XCH L # INTO L
042654,000399: 05,3716 30336 CA DUMPLOC # AND ECADR OF THIS EBANK INTO A
042655,000400: 05,3717 13701 TCF DNTMEXIT # SEND DUMPLOC AND TIME1
042656,000401:
042657,000402: 05,3720 03722 LDNDUMP ADRES DNDUMP
042658,000403: 05,3721 03735 LDNDUMP1 ADRES DNDUMP1
042659,000404:
042660,000405: 05,3722 34752 DNDUMP CA TWO # INCREMENT ECADR IN DUMPLOC
042661,000406: 05,3723 26336 ADS DUMPLOC # TO NEXT DP WORD TO BE
042662,000407: 05,3724 74357 MASK LOW8 # DUMPED AND SAVE IT.
042663,000408: 05,3725 10000 CCS A # IS THIS THE BEGINNING OF A NEW EBANK
042664,000409: 05,3726 13737 TCF DNDUMP2 # NO - THEN CONTINUE DUMPING
042665,000410: 05,3727 30336 CA DUMPLOC # YES - IS THIS THE END OF THE
042666,000411: 05,3730 70333 MASK DUMPCNT # N TH (N = 1 TO 4) COMPLETE ERASABLE
042667,000412: 05,3731 77722 MASK PRIO34 # DUMP (BIT14 FOR 4, BIT13 FOR 2 OR BIT12
042668,000413: 05,3732 10000 CCS A # FOR 1 COMPLETE ERASABLE DUMP(S)).
042669,000414: 05,3733 13515 TCF DNPHASE1 # YES - START SENDING INTERRUPTED DOWNLIST
042670,000415: # AGAIN
042671,000416: 05,3734 13711 TCF DNDUMPI +2 # NO - GO BACK AND INITIALIZE NEXT BANK
042672,000417:
042673,000418: 05,3735 33720 DNDUMP1 CA LDNDUMP # SET DNTMGOTO
042674,000419: 05,3736 54335 TS DNTMGOTO # FOR WORDS 3 TO 256D OF CURRENT EBANK
042675,000420:
042676,000421: 05,3737 30336 DNDUMP2 CA DUMPLOC
042677,000422: 05,3740 54003 TS EBANK # SET EBANK
042678,000423: 05,3741 74357 MASK LOW8 # ISOLATE RELATIVE ADDRESS.
042679,000424: 05,3742 54002 TS Q # (NOTE: MASK INSTRUCTION IS USED TO PICK
042680,000425: 05,3743 34754 CA NEG0 # UP ERASABLE REGISTERS SO THAT EDITING
042681,000426: 05,3744 54001 TS L # REGISTERS 20-23 WILL NOT BE ALTERED.)
042682,000427: 05,3745 50002 INDEX Q
042683,000428: 05,3746 E3,1400 EBANK= 1400 # PICK UP LOW ORDER REGISTER OF PAIR
042684,000429: 05,3746 71401 MASK 1401 # OF ERASABLE REGISTERS.
042685,000430: 05,3747 56001 XCH L
042686,000431: 05,3750 50002 INDEX Q # PICK UP HIGH ORDER REGISTER OF PAIR
042687,000432: 05,3751 71400 MASK 1400 # OF ERASABLE REGISTERS.
042688,000433: 05,3752 0340 EBANK= DNTMBUFF
042689,000434: 05,3752 13701 TCF DNTMEXIT # GO SEND THEM
042690,000435:
042691,000436: 05,3753 00006 SENDID EXTEND # ** ENTRANCE USED BY ERASABLE DUMP PROG.**
042692,000437: 05,3754 22335 QXCH DNTMGOTO # SET DNTMGOTO SO NEXT TIME PROG WILL GO
042693,000438: 05,3755 35011 CAF ERASID # TO LOCATION FOLLOWING :TC SENDID:
042694,000439:
042695,000440: 05,3756 54001 TS L # ** ENTRANCE USED BY REGULAR DOWNLINK PG **
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Page 997
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042697,000442: 05,3757 03605 TC WOZERO # GO SET WORD ORDER CODE TO ZERO
042698,000443: 05,3760 32065 CAF LOWIDCOD # PLACE SPECIAL ID CODE INTO L
042699,000444: 05,3761 56001 XCH L # AND ID BACK INTO A
042700,000445: 05,3762 13701 TCF DNTMEXIT # SEND DOWNLIST ID CODE(S).
042701,000446:
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In Luminary 98, code to check if it is time to set the word order bit
was inserted here.
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End of include-file DOWN-TELEMETRY_PROGRAM.agc. Parent file is MAIN.agc