Source Code
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These source-code files are part of a reconstructed copy of Comanche 67, the
Apollo Guidance Computer (AGC) Command Module (CM) software for Apollo 12.
They have been adapted from sources files for Comanche 55, and updated via
disassembly of binary dumps of original core rope memory modules, part numbers
2003972-1081, 2003972-1091, 2003972-1111, 2003972-1121, 2003972-1131, and 2003972-1141.
Since only binary dumps (rather than listings) of Comanche 67 are available as source material,
all comments and labels are approximate.
They have been taken from other AGC programs where possible, or, in some places, written
from scratch to match what we believe would have been in the original listing.
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046284,000002: ## Copyright: Public domain.
046285,000003: ## Filename: DOWN-TELEMETRY_PROGRAM.agc
046286,000004: ## Purpose: A section of Comanche revision 067.
046287,000005: ## It is part of the reconstructed source code for the flight
046288,000006: ## software for the Command Module's (CM) Apollo Guidance Computer
046289,000007: ## (AGC) for Apollo 12. No original listings of this program are
046290,000008: ## available; instead, this file was created via dissassembly of
046291,000009: ## dumps of Comanche 067 core rope modules and comparison with
046292,000010: ## other AGC programs.
046293,000011: ## Assembler: yaYUL
046294,000012: ## Contact: Ron Burkey <info@sandroid.org>.
046295,000013: ## Website: www.ibiblio.org/apollo/index.html
046296,000014: ## Mod history: 2023-08-16 MAS Created from Comanche 055.
046297,000015: ## 2024-05-13 MAS Updated for Comanche 067.
046298,000016:
046299,000017: # PROGRAM NAME - DOWN TELEMETRY PROGRAM
046300,000018: # MOD NO. - 0 TO COMPLETELY REWRITE THE DOWN TELEMETRY PROGRAM AND DOWNLINK ERASABLE DUMP PROGRAM FOR THE
046301,000019: # PURPOSE OF SAVING APPROXIMATELY 150 WORDS OF CORE STORAGE.
046302,000020: # THIS CHANGE REQUIRES AN ENTIRELY NEW METHOD OF SPECIFYING DOWNLINK LISTS. REFER TO DOWNLINK
046303,000021: # LISTS LOG SECTION FOR MORE DETAILS. HOWEVER THIS CHANGE WILL NOT AFFECT THE GROUND PROCESSING
046304,000022: # OF DOWN TELEMETRY DATA.
046305,000023: # MOD BY - KILROY, SMITH, DEWITT
046306,000024: # MOD BY - DENSMORE - JUNE 1969 - ELIMINATE ERASABLE DUMP COUNT
046307,000025: # DATE - 02 OCT 67
046308,000026: # AUTHORS - KILROY, SMITH, DEWITT, DEWOLF, FAGIN
046309,000027: # LOG SECTION - DOWN-TELEMETRY PROGRAM
046310,000028:
046311,000029: # FUNCTIONAL DESCRIPTION - THIS ROUTINE IS INITIATED BY TELEMETRY END
046312,000030: # PULSE FROM THE DOWNLINK TELEMETRY CONVERTER. THIS PULSE OCCURS
046313,000031: # AT 50 TIMES PER SEC (EVERY 20 MS) THEREFORE DODOWNTM IS
046314,000032: # EXECUTED AT THESE RATES. THIS ROUTINE SELECTS THE APPROPRIATE
046315,000033: # AGC DATA TO BE TRANSMITTED DOWNLINK AND LOADS IT INTO OUTPUT
046316,000034: # CHANNELS 34 AND 35. THE INFORMATION IS THEN GATED OUT FROM THE
046317,000035: # LGC IN SERIAL FASHION.
046318,000036:
046319,000037: # THIS PROGRAM IS CODED FOR A 2 SECOND DOWNLIST. SINCE DOWNRUPTS
046320,000038: # OCCUR EVERY 20 MS AND 2 AGC COMPUTER WORDS CAN BE PLACED IN
046321,000039: # CHANNELS 34 AND 35 DURING EACH DOWNRUPT THE PROGRAM IS CAPABLE
046322,000040: # OF SENDING 200 AGC WORDS EVERY 2 SECONDS.
046323,000041:
046324,000042: # CALLING SEQUENCE - NONE
046325,000043: # PROGRAM IS ENTERED VIA TCF DODOWNTM WHICH IS EXECUTED AS A
046326,000044: # RESULT OF A DOWNRUPT. CONTROL IS RETURNED VIA TCF RESUME WHICH
046327,000045: # IN EFFECT IS A RESUME.
046328,000046:
046329,000047: # SUBROUTINES CALLED - NONE
046330,000048:
046331,000049: # NORMAL EXIT MODE - TCF RESUME
046332,000050:
046333,000051: # ALARM OR ABORT EXIT MODE - NONE
046334,000052:
046335,000053: # RESTART PROTECTION:
046336,000054: # ON A FRESH START AND RESTART THE 'STARTSUB' SUBROUTINE WILL INITIALIZE THE DOWNLIST POINTER (ACTUALLY
046337,000055: # DNTMGOTO) TO THE BEGINNING OF THE CURRENT DOWNLIST (I.E. CURRENT CONTENTS OF DNLSTADR). THIS HAS THE
046338,000056: # EFFECT OF IGNORING THE REMAINDER OF THE DOWNLIST WHICH THE DOWN-TELEMETRY PROGRAM WAS WORKING ON WHEN
046339,000057: # THE RESTART (OR FRESH START) OCCURRED AND RESUME DOWN TELEMETRY FROM THE BEGINNING OF THE CURRENT
046340,000058: # DOWNLIST.
046341,000059:
046342,000060: # ALSO OF INTEREST IS THE FACT THAT ON A RESTART THE AGC WILL ZERO DOWNLINK CHANNELS 13, 34 AND 35.
046343,000061:
046344,000062: # DOWNLINK LIST SELECTION:
046345,000063: # THE APPROPRIATE DOWNLINK LISTS ARE SELECTED BY THE FOLLOWING:
046346,000064: # 1. FRESH START
046347,000065: # 2. V37EXXE WHERE XX = THE MAJOR MODE BEING SELECTED.
046348,000066: # 3. UPDATE PROGRAM (P27)
046349,000067: # 4. NON-V37 SELECTABLE TYPE PROGRAMS (E.G. AGS INITIALIZATION (SUNDANCE, LUMINARY) AND P61-P62
046350,000068: # TRANSITION (COLOSSUS) ETC.).
046351,000069:
046352,000070: # DOWNLINK LIST RULES AND LIMITATIONS:
046353,000071: # READ SECTION(S) WHICH FOLLOW 'DEBRIS' WRITEUP.
046354,000072:
046355,000073: # OUTPUT - EVERY 2 SECONDS 100 DOUBLE PRECISION WORDS (I.E. 200 LGC
046356,000074: # COMPUTER WORDS) ARE TRANSMITTED VIA DOWNLINK.
046357,000075:
046358,000076: # ERASABLE INITIALIZATION REQUIRED - NONE
046359,000077: # 'DNTMGOTO' AND 'DNLSTADR' ARE INITIALIZED BY THE FRESH START PROGRAM.
046360,000078:
046361,000079: # DEBRIS (ERASABLE LOCATIONS DESTROYED BY THIS PROGRAM) -
046362,000080: # LDATALST, DNTMBUFF TO DNTMBUFF +21D, TMINDEX, DNQ.
046363,000081:
046364,000082: # DODOWNTM IS ENTERED EVERY 20 MS BY AN INTERRUPT TRIGGERED BY THE
046365,000083: # RECEIPT OF AN ENDPULSE FROM THE SPACECRAFT TELEMETRY PROGRAMMER.
046366,000084:
046367,000085: # NOTES REGARDING DOWNLINK LISTS ASSOCIATED WITH THIS PROGRAM:
046368,000086: # 1. DOWNLISTS. - DOWNLISTS MUST BE COMPILED IN THE SAME BANK AS THE
046369,000087: # DOWN-TELEMETRY PROGRAM. THIS IS DONE FOR EASE OF CODING, FASTER
046370,000088: # EXECUTION.
046371,000089: # 2. EACH DOWNLINK LIST CONSISTS OF A CONTROL LIST AND A NUMBER OF
046372,000090: # SUBLISTS.
046373,000091: # 3. A SUBLIST REFERS TO A SNAPSHOT OR DATA COMMON TO THE SAME OR OTHER
046374,000092: # DOWNLINK LISTS. ANY SUBLIST CONTAINING COMMON DATA NEEDS TO BE
046375,000093: # CODED ONLY ONCE FOR THE APPLICABLE DOWNLINK LISTS.
046376,000094: # 4. SNAPSHOT SUBLISTS REFER SPECIFICALLY TO HOMOGENOUS DATA WHICH MUST BE
046377,000095: # SAVED IN A BUFFER DURING ONE DOWNRUPT.
046378,000096: # 5. THE 1DNADR FOR THE 1ST WORD OF SNAPSHOT DATA IS FOUND AT THE END
046379,000097: # OF EACH SNAPSHOT SUBLIST, SINCE THE PROGRAM CODING SENDS THIS DP WORD
046380,000098: # IMMEDIATELY AFTER STORING THE OTHERS IN THE SNAPSHOT BUFFER.
046381,000099: # 6. ALL LISTS ARE COMBINATIONS OF CODED ERASABLE ADDRESS CONSTANTS
046382,000100: # CREATED FOR THE DOWNLIST PROGRAM.
046383,000101: # A. 1DNADR 1-WORD DOWNLIST ADDRESS.
046384,000102: # SAME AS ECADR, BUT USED WHEN THE WORD ADDRESSED IS THE LEFT
046385,000103: # HALF OF A DOUBLE-PRECISION WORD FOR DOWN TELEMETRY.
046386,000104: # B. 2DNADR - 6DNADR N-WORD DOWNLIST ADDRESS, N = 2 - 6.
046387,000105: # SAME AS 1DNADR, BUT WITH THE 4 UNUSED BITS OF THE ECADR FORMAT
046388,000106: # FILLED IN WITH 0001-0101. USED TO POINT TO A LIST OF N DOUBLE-
046389,000107: # PRECISION WORDS, STORED CONSECUTIVELY, FOR DOWN TELEMETRY.
046390,000108: # C. DNCHAN DOWNLIST CHANNEL ADDRESS.
046391,000109: # SAME AS 1DNADR, BUT WITH PREFIX BITS 0111. USED TO POINT TO
046392,000110: # A PAIR OF CHANNELS FOR DOWN TELEMETRY.
046393,000111: # D. DNPTR DOWN TELEMETRY SUBLIST POINTER.
046394,000112: # SAME AS CAF BUT TAGGED AS A CONSTANT. USED IN CONTROL LIST TO POINT TO A SUBLIST.
046395,000113: # CAUTION --- A DNPTR CANNOT BE USED IN A SUBLIST.
046396,000114: # 7. THE WORD ORDER CODE IS SET TO ZERO AT THE BEGINNING OF EACH DOWNLIST (I.E. CONTROL LIST) AND WHEN
046397,000115: # A '1DNADR TIME2' IS DETECTED IN THE CONTROL LIST (ONLY).
046398,000116: # 8. IN THE SNAPSHOT SUBLIST ONLY, THE DNADR'S CANNOT POINT TO THE FIRST WORD OF ANY EBANK.
046399,000117:
046400,000118: # DOWNLINK LIST RESTRICTIONS:
046401,000119: # (THE FOLLOWING POINTS MAY BE LISTED ELSEWHERE BUT ARE LISTED HERE SO IT IS CLEAR THAT THESE THINGS CANNOT BE
046402,000120: # DONE)
046403,000121: # 1. SNAPSHOT DOWNLIST:
046404,000122: # (A) CANNOT CONTAIN THE FOLLOWING ECADRS (I.E. 1DNADR'S): 0, 400, 1000, 1400, 2000, 2400, 3000, 3400.
046405,000123: # (B) CAN CONTAIN ONLY 1DNADR'S
046406,000124: # 2. ALL DOWNLINKED DATA (EXCEPT CHANNELS) IS PICKED UP BY A <DCA<SO DOWNLINK LISTS CANNOT CONTAIN THE
046407,000125: # EQUIVALENT OF THE FOLLOWING ECADRS (I.E. IDNADRS): 377, 777, 1377, 1777, 2377, 27777, 3377, 3777.
046408,000126: # (NOTE: THE TERM EQUIVALENT ' MEANT THAT THE IDNADR TO 6DNADR WILL BE PROCESSED LIKE 1 TO 6 ECADRS)
046409,000127: # 3. CONTROL LISTS AND SUBLISTS CANNOT HAVE ENTRIES = OCTAL 00000 OR OCTAL 77777
046410,000128: # 4. THE '1DNADR TIME2' WHICH WILL CAUSE THE DOWNLINK PROGRAM TO SET THE WORDER CODE TO 3 MUST APPEAR IN THE
046411,000129: # CONTROL SECTION OF THE DOWNLIST.
046412,000130: # 5. 'DNCHAN 0' CANNOT BE USED.
046413,000131: # 6. 'DNPTR 0' CANNOT BE USED.
046414,000132: # 7. DNPTR CANNOT APPEAR IN A SUBLIST.
046415,000133:
046416,000134: # EBANK SETTINGS
046417,000135: # IN THE PROCESS OF SETTING THE EBANK (WHEN PICKING UP DOWNLINK DATA) THE DOWN TELEMETRY PROGRAM PUTS
046418,000136: # 'GARBAGE' INTO BITS15-12 OF EBANK. HUGH BLAIR-SMITH WARNS US THAT BITS15-12 OF EBANK MAY BECOME
046419,000137: # SIGNIFICANT SOMEDAY IN THE FUTURE. IF/WHEN THAT HAPPENS, THE PROGRAM SHOULD INSURE (BY MASKING ETC.)
046420,000138: # THAT BITS 15-12 OF EBANK ARE ZERO.
046421,000139:
046422,000140: # INITIALIZATION REQUIRED - TO INTERRUPT CURRENT LIST AND START A NEW ONE..
046423,000141: # 1. ADRES OF DOWNLINK LIST INTO DNLSTADR
046424,000142: # 2. NEGONE INTO SUBLIST
046425,000143: # 3. NEGONE INTO DNECADR
046426,000144:
046427,000145: 4000 SETLOC FFTAG12
046428,000146: 4000 BANK
046429,000147:
046430,000148: 4662 0337 EBANK= DNTMBUFF
046431,000149:
046432,000150: 4662 COUNT $$/DPROG
046433,000151: 4662 54016 DODOWNTM TS BANKRUPT
046434,000152: 4663 00006 EXTEND
046435,000153: 4664 22012 QXCH QRUPT # SAVE Q
046436,000154: 4665 35025 CA BIT7 # SET WORD ORDER CODE TO 1. EXCEPTION- AT
046437,000155: 4666 00006 EXTEND
046438,000156: 4667 02013 RAND CHAN13
046439,000157: 4670 10000 CCS A
046440,000158: 4671 00334 TC DNTMGOTO
046441,000159: 4672 35025 CA BIT7
046442,000160: 4673 00006 EXTEND # THE BEGINNING OF EACH LIST THE WORD
046443,000161: 4674 05013 WOR CHAN13 # CODE WILL BE SET BACK TO 0.
046444,000162: 4675 00334 TC DNTMGOTO # GOTO APPROPRIATE PHASE OF PROGRAM
046445,000163:
046446,000164: 05,2000 SETLOC DOWNTELM
046447,000165: 05,2000 BANK
046448,000166:
046449,000167: 05,3523 COUNT* $$/DPROG
046450,000168: 05,3523 37716 DNPHASE1 CA NEGONE # INITIALIZE ALL CONTROL WORDS
046451,000169: 05,3524 54336 TS SUBLIST # WORDS TO MINUS ONE
046452,000170: 05,3525 54335 TS DNECADR
046453,000171: 05,3526 33646 CA LDNPHAS2 # SET DNTMGOTO =O ALL SUBSEQUENT DOWNRUPTS
046454,000172: 05,3527 54334 TS DNTMGOTO # GO TO DNPHASE2
046455,000173: 05,3530 13544 TCF NEWLIST
046456,000174: 05,3531 10335 DNPHASE2 CCS DNECADR # SENDING OF DATA IN PROGRESS
046457,000175: 05,3532 03661 DODNADR TC FETCH2WD # YES - THEN FETCH THE NEXT 2 SP WORDS
046458,000176: 05,3533 77753 MINTIME2 -1DNADR TIME2 # NEGATIVE OF TIME2 1DNADR
046459,000177: 05,3534 13535 TCF +1 # (ECADR OF 3776 + 74001 = 77777)
046460,000178:
046461,000179: 05,3535 10336 CCS SUBLIST # IS THE SUBLIST IN CONTROL
046462,000180: 05,3536 13674 TCF NEXTINSL # YES
046463,000181: 05,3537 74001 DNADRDCR OCT 74001 # DNADR COUNT AND ECADR DECREMENTER
046464,000182:
046465,000183: 05,3540 30333 CHKLIST CA CTLIST
046466,000184: 05,3541 00006 EXTEND
046467,000185: 05,3542 63544 BZMF NEWLIST # IT WILL BE NEGATIVE AT END OF LIST
046468,000186: 05,3543 13551 TCF NEXTINCL
046469,000187: 05,3544 50332 NEWLIST INDEX DNLSTCOD
046470,000188: 05,3545 32335 CA DNTABLE # INITIALIZE CTLIST WITH
046471,000189: 05,3546 54333 TS CTLIST # STARTING ADDRESS OF NEW LIST
046472,000190: 05,3547 40332 CS DNLSTCOD
046473,000191: 05,3550 13763 TCF SENDID +3
046474,000192: 05,3551 50333 NEXTINCL INDEX CTLIST
046475,000193: 05,3552 30000 CA 0
046476,000194: 05,3553 10000 CCS A
046477,000195: 05,3554 24333 INCR CTLIST # SET POINTER TO PICK UP NEXT CTLIST WORD
046478,000196: 05,3555 13561 TCF +4 # ON NEXT ENTRY TO PROG. (A SHOULD NOT =0)
046479,000197: 05,3556 56333 XCH CTLIST # SET CTLIST TO NEGATIVE AND PLACE(CODING)
046480,000198: 05,3557 40000 COM # UNCOMPLEMENTED DNADR INTO A. (FOR LA)
046481,000199: 05,3560 56333 XCH CTLIST # (ST IN )
046482,000200: 05,3561 24000 +4 INCR A # (CTLIST)
046483,000201: 05,3562 54335 TS DNECADR # SAVE DNADR
046484,000202: 05,3563 63533 AD MINTIME2 # TEST FOR TIME2 (NEG. OF ECADR)
046485,000203: 05,3564 10000 CCS A
046486,000204: 05,3565 13571 TCF SETWO +1 # DON'T SET WORD ORDER CODE
046487,000205: 05,3566 47777 MINB1314 OCT 47777 # MINUS BIT 13 AND 14 (CAN'T GET HERE)
046488,000206: 05,3567 13571 TCF SETWO +1 # DON'T SET WORD ORDER CODE
046489,000207: 05,3570 03613 SETWO TC WOZERO # GO SET WORD ORDER CODE TO ZERO.
046490,000208: 05,3571 30335 +1 CA DNECADR # RELOAD A WITH THE DNADR.
046491,000209: 05,3572 63566 +2 AD MINB1314 # IS THIS A REGULAR DNADR?
046492,000210: 05,3573 00006 EXTEND
046493,000211: 05,3574 63661 BZMF FETCH2WD # YES. (A MUST NEVER BE ZERO)
046494,000212: 05,3575 67710 AD MINB12 # NO- IS IT A POINTER (DNPTR) OR A
046495,000213: 05,3576 00006 EXTEND # CHANNEL(DNCHAN)
046496,000214: 05,3577 63617 BZMF DODNPTR # IT'S A POINTER. (A MUST NEVER BE ZERO)
046497,000215:
046498,000216: 05,3600 00006 DODNCHAN TC 6 # (EXECUTED AS EXTEND) IT S A CHANNEL
046499,000217: 05,3601 50335 INDEX DNECADR
046500,000218: 05,3602 44000 INDEX 0 -4000 # (EXECUTED AS READ)
046501,000219: 05,3603 54001 TS L
046502,000220: 05,3604 00006 TC 6 # (EXECUTED AS EXTEND)
046503,000221: 05,3605 50335 INDEX DNECADR
046504,000222: 05,3606 43777 INDEX 0 -4001 # (EXECUTED AS READ)
046505,000223: 05,3607 54335 TS DNECADR # SET DNECADR
046506,000224: 05,3610 37716 CA NEGONE # TO MINUS
046507,000225: 05,3611 56335 XCH DNECADR # WHILE PRESERVING A.
046508,000226: 05,3612 13707 TCF DNTMEXIT # GO SEND CHANNELS
046509,000227:
046510,000228: 05,3613 45025 WOZERO CS BIT7
046511,000229: 05,3614 00006 EXTEND
046512,000230: 05,3615 03013 WAND CHAN13 # SET WORD ORDER CODE TO ZERO
046513,000231: 05,3616 00002 TC Q # RETURN TO CALLER
046514,000232:
046515,000233: 05,3617 50335 DODNPTR INDEX DNECADR # DNECADR CONTAINS ADRES OF SUBLIST
046516,000234: 05,3620 00000 0 0 # CLEAR AND ADD LIST ENTRY INTO A.
046517,000235: 05,3621 10000 CCS A # IS THIS A SNAPSHOT SUBLIST
046518,000236: 05,3622 30335 CA DNECADR # NO, IT IS A REGULAR SUBLIST.
046519,000237: 05,3623 13673 TCF DOSUBLST # A MUST NOT BE ZERO.
046520,000238:
046521,000239: 05,3624 56335 XCH DNECADR # YES, IT IS A SNAPSHOT SUBLIST.
046522,000240: 05,3625 54336 TS SUBLIST # C(DNECADR) INTO SUBLIST
046523,000241: 05,3626 35035 CAF ZERO # A INTO A
046524,000242: 05,3627 56335 XCH TMINDEX # (NOTE.. TMINDEX = DNECADR)
046525,000243:
046526,000244: # THE FOLLOWING CODING (FROM SNAPLOOP TO SNAPEND) IS FOR THE PURPOSE OF TAKING A SNAPSHOT OF 12 DP REGISTERS.
046527,000245: # THIS IS DONE BY SAVING 11 DP REGISTERS IN DNTMBUFF AND SENDING THE FIRST DP WORD IMMEDIATELY.
046528,000246: # THE SNAPSHOT PROCESSING IS THE MOST TIME CONSUMING AND THEREFORE THE CODING AND LIST STRUCTURE WERE DESIGNED
046529,000247: # TO MINIMIZE TIME. THE TIME OPTIMIZATION RESULTS IN RULES UNIQUE TO THE SNAPSHOT PORTION OF THE DOWNLIST.
046530,000248: # THESE RULES ARE ......
046531,000249: # 1. ONLY 1DNADR'S CAN APPEAR IN THE SNAPSHOT SUBLIST
046532,000250: # 2. THE 1DNADR'S CANNOT REFER TO THE FIRST LOCATION IN ANY BANK.
046533,000251:
046534,000252: 05,3630 54003 SNAPLOOP TS EBANK # SET EBANK
046535,000253: 05,3631 74373 MASK LOW8 # ISOLATE RELATIVE ADDRESS
046536,000254: 05,3632 00006 EXTEND
046537,000255: 05,3633 50000 INDEX A
046538,000256: 05,3634 E3,1401 EBANK= 1401
046539,000257: 05,3634 31402 DCA 1401 # PICK UP 2 SNAPSHOT WORDS.
046540,000258: 05,3635 0337 EBANK= DNTMBUFF
046541,000259: 05,3635 50335 INDEX TMINDEX
046542,000260: 05,3636 52340 DXCH DNTMBUFF # STORE 2 SNAPSHOT WORDS IN BUFFER
046543,000261: 05,3637 24335 INCR TMINDEX # SET BUFFER INDEX FOR NEXT 2 WORDS.
046544,000262: 05,3640 24335 INCR TMINDEX
046545,000263: 05,3641 24336 SNAPAGN INCR SUBLIST # SET POINTER TO NEXT 2 WORDS OF SNAPSHOT
046546,000264: 05,3642 50336 INDEX SUBLIST
046547,000265: 05,3643 00000 0 0 # = CA SSSS (SSSS = NEXT ENTRY IN SUBLIST)
046548,000266: 05,3644 10000 CCS A # TEST FOR LAST TWO WORDS OF SNAPSHOT.
046549,000267: 05,3645 13630 TCF SNAPLOOP # NOT LAST TWO.
046550,000268: 05,3646 03531 LDNPHAS2 GENADR DNPHASE2
046551,000269: 05,3647 54336 TS SUBLIST # YES, LAST. SAVE A.
046552,000270: 05,3650 37716 CA NEGONE # SET DNECADR AND
046553,000271: 05,3651 54335 TS DNECADR # SUBLIST POINTERS
046554,000272: 05,3652 56336 XCH SUBLIST # TO NEGATIVE VALUES.
046555,000273: 05,3653 54003 TS EBANK
046556,000274: 05,3654 74373 MASK LOW8
046557,000275: 05,3655 00006 EXTEND
046558,000276: 05,3656 50000 INDEX A
046559,000277: 05,3657 E3,1401 EBANK= 1401
046560,000278: 05,3657 31402 DCA 1401 # PICK UP FIRST 2 WORDS OF SNAPSHOT.
046561,000279: 05,3660 0337 EBANK= DNTMBUFF
046562,000280: 05,3660 13707 SNAPEND TCF DNTMEXIT # NOW GO SEND THEM.
046563,000281:
046564,000282: 05,3661 30335 FETCH2WD CA DNECADR
046565,000283: 05,3662 54003 TS EBANK # SET EBANK
046566,000284: 05,3663 74373 MASK LOW8 # ISOLATE RELATIVE ADDRESS
046567,000285: 05,3664 54001 TS L
046568,000286: 05,3665 33537 CA DNADRDCR # DECREMENT COUNT AND ECADR
046569,000287: 05,3666 26335 ADS DNECADR
046570,000288: 05,3667 00006 EXTEND
046571,000289: 05,3670 50001 INDEX L
046572,000290: 05,3671 E3,1400 EBANK= 1400
046573,000291: 05,3671 31401 DCA 1400 # PICK UP 2 DATA WORDS
046574,000292: 05,3672 0337 EBANK= DNTMBUFF
046575,000293: 05,3672 13707 TCF DNTMEXIT # NOW GO SEND THEM.
046576,000294:
046577,000295: 05,3673 54336 DOSUBLST TS SUBLIST # SET SUBLIST POINTER
046578,000296: 05,3674 50336 NEXTINSL INDEX SUBLIST
046579,000297: 05,3675 00000 0 0 # = CA SSSS (SSSS = NEXT ENTRY IN SUBLIST)
046580,000298: 05,3676 10000 CCS A # IS IT THE END OF THE SUBLIST
046581,000299: 05,3677 24336 INCR SUBLIST # NO-
046582,000300: 05,3700 13704 TCF +4
046583,000301: 05,3701 54336 TS SUBLIST # SAVE A.
046584,000302: 05,3702 37716 CA NEGONE # SET SUBLIST TO MINUS
046585,000303: 05,3703 56336 XCH SUBLIST # RETRIEVE A.
046586,000304: 05,3704 24000 +4 INCR A
046587,000305: 05,3705 54335 TS DNECADR # SAVE DNADR
046588,000306: 05,3706 13572 TCF SETWO +2 # GO USE COMMON CODING (PROBLEMS WOULD
046589,000307: # OCCUR IF THE PROGRAM ENCOUNTERED A
046590,000308: # DNPTR NOW)
046591,000309:
046592,000310: 05,3707 00006 DNTMEXIT EXTEND # DOWN-TELEMETRY EXIT
046593,000311: 05,3710 01034 WRITE DNTM1 # TO SEND A + L TO CHANNELS 34 + 35
046594,000312: 05,3711 30001 CA L # RESPECTIVELY
046595,000313: 05,3712 00006 TMEXITL EXTEND
046596,000314: 05,3713 01035 WRITE DNTM2
046597,000315: 05,3714 15347 TMRESUME TCF RESUME # EXIT TELEMETRY PROGRAM VIA RESUME.
046598,000316:
046599,000317: 05,3715 7710 MINB12 EQUALS -1/8
046600,000318: 05,3715 0335 DNECADR EQUALS TMINDEX
046601,000319: 05,3715 0333 CTLIST EQUALS LDATALST
046602,000320: 05,3715 0336 SUBLIST EQUALS DNQ
046603,000321:
046604,000322: # SUBROUTINE NAME - DNDUMP
046605,000323:
046606,000324: # FUNCTIONAL DESCRIPTION - TO SEND (DUMP) ALL 8 BANKS OF ERASABLE STORAGE TWICE. BANKS ARE SENT ONE AT A TIME
046607,000325: # EACH BANK IS PRECEEDED BY AN ID WORD, SYNCH BITS, ECADR AND TIME1 FOLLOWED BY THE 256D WORDS OF EACH
046608,000326: # EBANK. EBANKS ARE DUMPED IN ORDER (I.E. EBANK 0 FIRST, THEN EBANK1 ETC.)
046609,000327:
046610,000328: # CALLING SEQUENCE- THE GROUND OR ASTRONAUT BY KEYING V74E CAN INITIALIZE THE DUMP.
046611,000329: # AFTER KEYING IN V74E THE CURRENT DOWNLIST WILL BE IMMEDIATELY TERMINATED AND THE DOWNLINK ERASABLE DUMP
046612,000330: # WILL BEGIN.
046613,000331:
046614,000332: # ONCE INITIATED THE DOWNLINK ERASABLE DUMP CAN BE TERMINATED (AND INTERRUPTED DOWNLIST REINSTATED) ONLY
046615,000333: # BY THE FOLLOWING:
046616,000334: # 1. A FRESH START
046617,000335: # 2. COMPLETION OF BOTH COMPLETE DUMPS
046618,000336: # 3. AND INVOLUNTARILY BY A RESTART.
046619,000337: # NORMAL EXIT MODE- TCF DNPHASE1
046620,000338:
046621,000339: # ALARM OR ABORT MODE- NONE
046622,000340:
046623,000341: # *SUBROUTINES CALLED- NONE.
046624,000342:
046625,000343: # ERASABLE INITIALIZATION REQUIRED-
046626,000344: # NONE
046627,000345: # DEBRIS- DUMPLOC, DUMPSW, DNTMGOTO, EBANK AND CENTRAL REGISTERS
046628,000346:
046629,000347: # TIMING- TIME (IN SECS) = ((NO.DUMPS)*(NO.EBANKS)*(WDSPEREBANK + NO.IDWDS)) / NO.WDSPERSEC
046630,000348: # TIME (IN SECS) = ( 4 )*( 8 )*( 256 + 4 ) / 100
046631,000349: # THUS TIME (IN SECS TO SEND DUMP OF ERASABLE 4 TIMES VIA DOWNLINK) = 83.2 SECONDS
046632,000350:
046633,000351: # STRUCTURE OF ONE EBANK AS IT IS SENT BY DOWNLINK PROGRAM-
046634,000352: # (REMINDER-THIS ONLY DESCRIBES ONE OF THE 8 EBANKS X 4 (DUMPS) = 32 EBANKS WHICH WILL BE SENT BY DNDUMP)
046635,000353:
046636,000354: # DOWNLIST W
046637,000355: # WORD TAKEN FROM CONTENTS OF EXAMPLE O COMMENTS
046638,000356: # 1 ERASID 0177X 0 DOWNLIST I.D. FOR DOWNLINK ERASABLE DUMP (X=7 CSM, 6 LM)
046639,000357: # 2 LOWIDCOD 77340 1 DOWNLINK SYNCH BITS. (SAME ONE USED IN ALL OTHER DOWNLISTS)
046640,000358: # 3 DUMPLOC 13400 1 (SEE NOTES ON DUMPLOC) 1 = 3RD ERAS DUMP, 3400=ECADR OF 5TH WD
046641,000359: # 4 TIME1 14120 1 TIME IN CENTISECONDS
046642,000360: # 5 FIRST WORD OF EBANK X 03400 1 IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1400 (ECADR 3400)
046643,000361: # 6 2ND WORD OF EBANK X 00142 1 IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1401 (ECADR 3401)
046644,000362: # 7 3RD WORD OF EBANK X 00142 1 IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1402 (ECADR 3402)
046645,000363: # . 1
046646,000364: # . 1
046647,000365: # . 1
046648,000366: # 260D 256TH WORD OF EBANK X 03777 1 IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1777 (ECADR 3777)
046649,000367:
046650,000368: # NOTE- DUMPLOC CONTAINS THE COUNTER AND ECADR FOR EACH WORD BEING SENT.
046651,000369: # THE BIT STRUCTURE OF DUMPLOC IS FOLLOWS---
046652,000370: # X = NOT USED
046653,000371: # X ABC EEE RRRRRRRR ABC = ERASABLE DUMP COUNTER (I.E. ABC = 0,1,2 OR 3 WHICH MEANS THAT
046654,000372: # COMPLETE ERASABLE DUMP NUMBER 1,2,3 OR 4 RESPECTIVELY IS IN PROGRESS)
046655,000373: # EEE = EBANK BITS
046656,000374: # RRRRRRRR = RELATIVE ADDRESS WITHIN AN EBANK.
046657,000375:
046658,000376: 05,3715 35035 DNDUMPI CA ZERO # INITIALIZE DOWNLINK
046659,000377: 05,3716 54335 TS DUMPLOC # ERASABLE DUMP
046660,000378: 05,3717 03760 +2 TC SENDID # GO SEND ID AND SYNCH BITS
046661,000379: 05,3720 33727 CA LDNDUMP1 # SET DNTMGOTO
046662,000380: 05,3721 54334 TS DNTMGOTO # TO LOCATION FOR NEXT PASS
046663,000381: 05,3722 30025 CA TIME1 # PLACE TIME1
046664,000382: 05,3723 56001 XCH L # INTO L
046665,000383: 05,3724 30335 CA DUMPLOC # AND ECADR OF THIS EBANK INTO A
046666,000384: 05,3725 13707 TCF DNTMEXIT # SEND DUMPLOC AND TIME1
046667,000385:
046668,000386: 05,3726 03730 LDNDUMP ADRES DNDUMP
046669,000387: 05,3727 03742 LDNDUMP1 ADRES DNDUMP1
046670,000388:
046671,000389: 05,3730 35032 DNDUMP CA TWO # INCREMENT ECADR IN DUMPLOC
046672,000390: 05,3731 26335 ADS DUMPLOC # TO NEXT DP WORD TO BE
046673,000391: 05,3732 74373 MASK LOW8 # DUMPED AND SAVE IT.
046674,000392: 05,3733 10000 CCS A # IS THIS THE BEGINNING OF A NEW EBANK
046675,000393: 05,3734 13744 TCF DNDUMP2 # NO- THEN CONTINUE DUMPING
046676,000394: 05,3735 30335 CA DUMPLOC # YES- IS THIS THE END OF THE
046677,000395: 05,3736 75017 MASK BIT13 # SECOND COMPLETE ERASABLE DUMP?
046678,000396: 05,3737 00006 EXTEND
046679,000397: 05,3740 13717 BZF DNDUMPI +2 # NO - GO BACK AND INITIALIZE NEXT BANK
046680,000398: 05,3741 13523 TCF DNPHASE1 # YES - SEND DOWNLIST AGAIN
046681,000399: 05,3742 33726 DNDUMP1 CA LDNDUMP # SET DNTMGOTO
046682,000400: 05,3743 54334 TS DNTMGOTO # FOR WORDS 3 TO 256D OF CURRENT EBANK
046683,000401:
046684,000402: 05,3744 30335 DNDUMP2 CA DUMPLOC
046685,000403: 05,3745 54003 TS EBANK # SET EBANK
046686,000404: 05,3746 74373 MASK LOW8 # ISOLATE RELATIVE ADDRESS.
046687,000405: 05,3747 54002 TS Q # (NOTE: MASK INSTRUCTION IS USED TO PICK
046688,000406: 05,3750 35034 CA NEG0 # UP ERASABLE REGISTERS SO THAT EDITING
046689,000407: 05,3751 54001 TS L # REGISTERS 20-23 WILL NOT BE ALTERED.)
046690,000408: 05,3752 50002 INDEX Q
046691,000409: 05,3753 E3,1400 EBANK= 1400 # PICK UP LOW ORDER REGISTER OF PAIR
046692,000410: 05,3753 71401 MASK 1401 # OF ERASABLE REGISTERS.
046693,000411: 05,3754 56001 XCH L
046694,000412: 05,3755 50002 INDEX Q # PICK UP HIGH ORDER REGISTER OF PAIR
046695,000413: 05,3756 71400 MASK 1400 # OF ERASABLE REGISTERS.
046696,000414: 05,3757 0337 EBANK= DNTMBUFF
046697,000415: 05,3757 13707 TCF DNTMEXIT # GO SEND THEM
046698,000416:
046699,000417: 05,3760 00006 SENDID EXTEND # ** ENTRANCE USED BY ERASABLE DUMP PROG. **
046700,000418: 05,3761 22334 QXCH DNTMGOTO # SET DNTMGOTO SO NEXT TIME PROG WILL GO
046701,000419: 05,3762 35070 CAF ERASID # TO LOCATION FOLLOWING :TC SENDID:
046702,000420:
046703,000421: 05,3763 54001 TS L # ** ENTRANCE USED BY REGULAR DOWNLINK PG **
046704,000422: 05,3764 03613 TC WOZERO # GO SET WORD ORDER CODE TO ZERO
046705,000423: 05,3765 32000 CAF LOWIDCOD # PLACE SPECIAL ID CODE INTO L
046706,000424: 05,3766 56001 XCH L # AND ID BACK INTO A
046707,000425: 05,3767 13707 TCF DNTMEXIT # SEND DOWNLIST ID CODE(S).
End of include-file DOWN-TELEMETRY_PROGRAM.agc. Parent file is MAIN.agc