Source Code
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These source-code files are part of a reconstructed copy of Comanche 72, the
first release of the Apollo Guidance Computer (AGC) Command Module (CM) software
for Apollo 13.
They have been adapted from sources files created from a listing of Comanche 55.
These source files were updated to match binary dumps of a set of Comanche 67 rope modules.
They were then further modified by applying known changes between Comanche 67 and Comanche 72.
A binary dump of module B2 of Comanche 72, part number 2010802-021, was also used
to validate changes made to banks 05-13. The resulting code assembles to have identical
memory-bank checksums as those specified in NASA drawing 2021153G; this gives reasonably
high confidence that the changes that have been made are correct. In places where
ambiguity exists, this ambiguity is discussed in "## Reconstruction:" comments.
Since no contemporary listings of Comanche 72 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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046671,000002: ## Copyright: Public domain.
046672,000003: ## Filename: DOWN-TELEMETRY_PROGRAM.agc
046673,000004: ## Purpose: A section of Comanche revision 072.
046674,000005: ## It is part of the reconstructed source code for the first
046675,000006: ## release of the software for the Command Module's (CM) Apollo
046676,000007: ## Guidance Computer (AGC) for Apollo 13. No original listings
046677,000008: ## of this program are available; instead, this file was recreated
046678,000009: ## from a printout of Comanche 055, binary dumps of a set of
046679,000010: ## Comanche 067 rope modules, and changelogs between Comanche 067
046680,000011: ## and 072. It has been adapted such that the resulting bugger words
046681,000012: ## exactly match those specified for Comanche 072 in NASA drawing
046682,000013: ## 2021153G, which gives relatively high confidence that the
046683,000014: ## reconstruction is correct.
046684,000015: ## Assembler: yaYUL
046685,000016: ## Contact: Ron Burkey <info@sandroid.org>.
046686,000017: ## Website: www.ibiblio.org/apollo/index.html
046687,000018: ## Mod history: 2024-05-13 MAS Created from Comanche 067.
046688,000019:
046689,000020: # PROGRAM NAME - DOWN TELEMETRY PROGRAM
046690,000021: # MOD NO. - 0 TO COMPLETELY REWRITE THE DOWN TELEMETRY PROGRAM AND DOWNLINK ERASABLE DUMP PROGRAM FOR THE
046691,000022: # PURPOSE OF SAVING APPROXIMATELY 150 WORDS OF CORE STORAGE.
046692,000023: # THIS CHANGE REQUIRES AN ENTIRELY NEW METHOD OF SPECIFYING DOWNLINK LISTS. REFER TO DOWNLINK
046693,000024: # LISTS LOG SECTION FOR MORE DETAILS. HOWEVER THIS CHANGE WILL NOT AFFECT THE GROUND PROCESSING
046694,000025: # OF DOWN TELEMETRY DATA.
046695,000026: # MOD BY - KILROY, SMITH, DEWITT
046696,000027: # MOD BY - DENSMORE - JUNE 1969 - ELIMINATE ERASABLE DUMP COUNT
046697,000028: # DATE - 02 OCT 67
046698,000029: # AUTHORS - KILROY, SMITH, DEWITT, DEWOLF, FAGIN
046699,000030: # LOG SECTION - DOWN-TELEMETRY PROGRAM
046700,000031:
046701,000032: # FUNCTIONAL DESCRIPTION - THIS ROUTINE IS INITIATED BY TELEMETRY END
046702,000033: # PULSE FROM THE DOWNLINK TELEMETRY CONVERTER. THIS PULSE OCCURS
046703,000034: # AT 50 TIMES PER SEC (EVERY 20 MS) THEREFORE DODOWNTM IS
046704,000035: # EXECUTED AT THESE RATES. THIS ROUTINE SELECTS THE APPROPRIATE
046705,000036: # AGC DATA TO BE TRANSMITTED DOWNLINK AND LOADS IT INTO OUTPUT
046706,000037: # CHANNELS 34 AND 35. THE INFORMATION IS THEN GATED OUT FROM THE
046707,000038: # LGC IN SERIAL FASHION.
046708,000039:
046709,000040: # THIS PROGRAM IS CODED FOR A 2 SECOND DOWNLIST. SINCE DOWNRUPTS
046710,000041: # OCCUR EVERY 20 MS AND 2 AGC COMPUTER WORDS CAN BE PLACED IN
046711,000042: # CHANNELS 34 AND 35 DURING EACH DOWNRUPT THE PROGRAM IS CAPABLE
046712,000043: # OF SENDING 200 AGC WORDS EVERY 2 SECONDS.
046713,000044:
046714,000045: # CALLING SEQUENCE - NONE
046715,000046: # PROGRAM IS ENTERED VIA TCF DODOWNTM WHICH IS EXECUTED AS A
046716,000047: # RESULT OF A DOWNRUPT. CONTROL IS RETURNED VIA TCF RESUME WHICH
046717,000048: # IN EFFECT IS A RESUME.
046718,000049:
046719,000050: # SUBROUTINES CALLED - NONE
046720,000051:
046721,000052: # NORMAL EXIT MODE - TCF RESUME
046722,000053:
046723,000054: # ALARM OR ABORT EXIT MODE - NONE
046724,000055:
046725,000056: # RESTART PROTECTION:
046726,000057: # ON A FRESH START AND RESTART THE 'STARTSUB' SUBROUTINE WILL INITIALIZE THE DOWNLIST POINTER (ACTUALLY
046727,000058: # DNTMGOTO) TO THE BEGINNING OF THE CURRENT DOWNLIST (I.E. CURRENT CONTENTS OF DNLSTADR). THIS HAS THE
046728,000059: # EFFECT OF IGNORING THE REMAINDER OF THE DOWNLIST WHICH THE DOWN-TELEMETRY PROGRAM WAS WORKING ON WHEN
046729,000060: # THE RESTART (OR FRESH START) OCCURRED AND RESUME DOWN TELEMETRY FROM THE BEGINNING OF THE CURRENT
046730,000061: # DOWNLIST.
046731,000062:
046732,000063: # ALSO OF INTEREST IS THE FACT THAT ON A RESTART THE AGC WILL ZERO DOWNLINK CHANNELS 13, 34 AND 35.
046733,000064:
046734,000065: # DOWNLINK LIST SELECTION:
046735,000066: # THE APPROPRIATE DOWNLINK LISTS ARE SELECTED BY THE FOLLOWING:
046736,000067: # 1. FRESH START
046737,000068: # 2. V37EXXE WHERE XX = THE MAJOR MODE BEING SELECTED.
046738,000069: # 3. UPDATE PROGRAM (P27)
046739,000070: # 4. NON-V37 SELECTABLE TYPE PROGRAMS (E.G. AGS INITIALIZATION (SUNDANCE, LUMINARY) AND P61-P62
046740,000071: # TRANSITION (COLOSSUS) ETC.).
046741,000072:
046742,000073: # DOWNLINK LIST RULES AND LIMITATIONS:
046743,000074: # READ SECTION(S) WHICH FOLLOW 'DEBRIS' WRITEUP.
046744,000075:
046745,000076: # OUTPUT - EVERY 2 SECONDS 100 DOUBLE PRECISION WORDS (I.E. 200 LGC
046746,000077: # COMPUTER WORDS) ARE TRANSMITTED VIA DOWNLINK.
046747,000078:
046748,000079: # ERASABLE INITIALIZATION REQUIRED - NONE
046749,000080: # 'DNTMGOTO' AND 'DNLSTADR' ARE INITIALIZED BY THE FRESH START PROGRAM.
046750,000081:
046751,000082: # DEBRIS (ERASABLE LOCATIONS DESTROYED BY THIS PROGRAM) -
046752,000083: # LDATALST, DNTMBUFF TO DNTMBUFF +21D, TMINDEX, DNQ.
046753,000084:
046754,000085: # DODOWNTM IS ENTERED EVERY 20 MS BY AN INTERRUPT TRIGGERED BY THE
046755,000086: # RECEIPT OF AN ENDPULSE FROM THE SPACECRAFT TELEMETRY PROGRAMMER.
046756,000087:
046757,000088: # NOTES REGARDING DOWNLINK LISTS ASSOCIATED WITH THIS PROGRAM:
046758,000089: # 1. DOWNLISTS. - DOWNLISTS MUST BE COMPILED IN THE SAME BANK AS THE
046759,000090: # DOWN-TELEMETRY PROGRAM. THIS IS DONE FOR EASE OF CODING, FASTER
046760,000091: # EXECUTION.
046761,000092: # 2. EACH DOWNLINK LIST CONSISTS OF A CONTROL LIST AND A NUMBER OF
046762,000093: # SUBLISTS.
046763,000094: # 3. A SUBLIST REFERS TO A SNAPSHOT OR DATA COMMON TO THE SAME OR OTHER
046764,000095: # DOWNLINK LISTS. ANY SUBLIST CONTAINING COMMON DATA NEEDS TO BE
046765,000096: # CODED ONLY ONCE FOR THE APPLICABLE DOWNLINK LISTS.
046766,000097: # 4. SNAPSHOT SUBLISTS REFER SPECIFICALLY TO HOMOGENOUS DATA WHICH MUST BE
046767,000098: # SAVED IN A BUFFER DURING ONE DOWNRUPT.
046768,000099: # 5. THE 1DNADR FOR THE 1ST WORD OF SNAPSHOT DATA IS FOUND AT THE END
046769,000100: # OF EACH SNAPSHOT SUBLIST, SINCE THE PROGRAM CODING SENDS THIS DP WORD
046770,000101: # IMMEDIATELY AFTER STORING THE OTHERS IN THE SNAPSHOT BUFFER.
046771,000102: # 6. ALL LISTS ARE COMBINATIONS OF CODED ERASABLE ADDRESS CONSTANTS
046772,000103: # CREATED FOR THE DOWNLIST PROGRAM.
046773,000104: # A. 1DNADR 1-WORD DOWNLIST ADDRESS.
046774,000105: # SAME AS ECADR, BUT USED WHEN THE WORD ADDRESSED IS THE LEFT
046775,000106: # HALF OF A DOUBLE-PRECISION WORD FOR DOWN TELEMETRY.
046776,000107: # B. 2DNADR - 6DNADR N-WORD DOWNLIST ADDRESS, N = 2 - 6.
046777,000108: # SAME AS 1DNADR, BUT WITH THE 4 UNUSED BITS OF THE ECADR FORMAT
046778,000109: # FILLED IN WITH 0001-0101. USED TO POINT TO A LIST OF N DOUBLE-
046779,000110: # PRECISION WORDS, STORED CONSECUTIVELY, FOR DOWN TELEMETRY.
046780,000111: # C. DNCHAN DOWNLIST CHANNEL ADDRESS.
046781,000112: # SAME AS 1DNADR, BUT WITH PREFIX BITS 0111. USED TO POINT TO
046782,000113: # A PAIR OF CHANNELS FOR DOWN TELEMETRY.
046783,000114: # D. DNPTR DOWN TELEMETRY SUBLIST POINTER.
046784,000115: # SAME AS CAF BUT TAGGED AS A CONSTANT. USED IN CONTROL LIST TO POINT TO A SUBLIST.
046785,000116: # CAUTION --- A DNPTR CANNOT BE USED IN A SUBLIST.
046786,000117: # 7. THE WORD ORDER CODE IS SET TO ZERO AT THE BEGINNING OF EACH DOWNLIST (I.E. CONTROL LIST) AND WHEN
046787,000118: # A '1DNADR TIME2' IS DETECTED IN THE CONTROL LIST (ONLY).
046788,000119: # 8. IN THE SNAPSHOT SUBLIST ONLY, THE DNADR'S CANNOT POINT TO THE FIRST WORD OF ANY EBANK.
046789,000120:
046790,000121: # DOWNLINK LIST RESTRICTIONS:
046791,000122: # (THE FOLLOWING POINTS MAY BE LISTED ELSEWHERE BUT ARE LISTED HERE SO IT IS CLEAR THAT THESE THINGS CANNOT BE
046792,000123: # DONE)
046793,000124: # 1. SNAPSHOT DOWNLIST:
046794,000125: # (A) CANNOT CONTAIN THE FOLLOWING ECADRS (I.E. 1DNADR'S): 0, 400, 1000, 1400, 2000, 2400, 3000, 3400.
046795,000126: # (B) CAN CONTAIN ONLY 1DNADR'S
046796,000127: # 2. ALL DOWNLINKED DATA (EXCEPT CHANNELS) IS PICKED UP BY A <DCA<SO DOWNLINK LISTS CANNOT CONTAIN THE
046797,000128: # EQUIVALENT OF THE FOLLOWING ECADRS (I.E. IDNADRS): 377, 777, 1377, 1777, 2377, 27777, 3377, 3777.
046798,000129: # (NOTE: THE TERM EQUIVALENT ' MEANT THAT THE IDNADR TO 6DNADR WILL BE PROCESSED LIKE 1 TO 6 ECADRS)
046799,000130: # 3. CONTROL LISTS AND SUBLISTS CANNOT HAVE ENTRIES = OCTAL 00000 OR OCTAL 77777
046800,000131: # 4. THE '1DNADR TIME2' WHICH WILL CAUSE THE DOWNLINK PROGRAM TO SET THE WORDER CODE TO 3 MUST APPEAR IN THE
046801,000132: # CONTROL SECTION OF THE DOWNLIST.
046802,000133: # 5. 'DNCHAN 0' CANNOT BE USED.
046803,000134: # 6. 'DNPTR 0' CANNOT BE USED.
046804,000135: # 7. DNPTR CANNOT APPEAR IN A SUBLIST.
046805,000136:
046806,000137: # EBANK SETTINGS
046807,000138: # IN THE PROCESS OF SETTING THE EBANK (WHEN PICKING UP DOWNLINK DATA) THE DOWN TELEMETRY PROGRAM PUTS
046808,000139: # 'GARBAGE' INTO BITS15-12 OF EBANK. HUGH BLAIR-SMITH WARNS US THAT BITS15-12 OF EBANK MAY BECOME
046809,000140: # SIGNIFICANT SOMEDAY IN THE FUTURE. IF/WHEN THAT HAPPENS, THE PROGRAM SHOULD INSURE (BY MASKING ETC.)
046810,000141: # THAT BITS 15-12 OF EBANK ARE ZERO.
046811,000142:
046812,000143: # INITIALIZATION REQUIRED - TO INTERRUPT CURRENT LIST AND START A NEW ONE..
046813,000144: # 1. ADRES OF DOWNLINK LIST INTO DNLSTADR
046814,000145: # 2. NEGONE INTO SUBLIST
046815,000146: # 3. NEGONE INTO DNECADR
046816,000147:
046817,000148: 4000 SETLOC FFTAG12
046818,000149: 4000 BANK
046819,000150:
046820,000151: 4662 0337 EBANK= DNTMBUFF
046821,000152:
046822,000153: 4662 COUNT $$/DPROG
046823,000154: 4662 54016 DODOWNTM TS BANKRUPT
046824,000155: 4663 00006 EXTEND
046825,000156: 4664 22012 QXCH QRUPT # SAVE Q
046826,000157: 4665 35025 CA BIT7 # SET WORD ORDER CODE TO 1. EXCEPTION- AT
046827,000158: 4666 00006 EXTEND
046828,000159: 4667 02013 RAND CHAN13
046829,000160: 4670 10000 CCS A
046830,000161: 4671 00334 TC DNTMGOTO
046831,000162: 4672 35025 CA BIT7
046832,000163: 4673 00006 EXTEND # THE BEGINNING OF EACH LIST THE WORD
046833,000164: 4674 05013 WOR CHAN13 # CODE WILL BE SET BACK TO 0.
046834,000165: 4675 00334 TC DNTMGOTO # GOTO APPROPRIATE PHASE OF PROGRAM
046835,000166:
046836,000167: 05,2000 SETLOC DOWNTELM
046837,000168: 05,2000 BANK
046838,000169:
046839,000170: 05,3523 COUNT* $$/DPROG
046840,000171: 05,3523 37716 DNPHASE1 CA NEGONE # INITIALIZE ALL CONTROL WORDS
046841,000172: 05,3524 54336 TS SUBLIST # WORDS TO MINUS ONE
046842,000173: 05,3525 54335 TS DNECADR
046843,000174: 05,3526 33646 CA LDNPHAS2 # SET DNTMGOTO =O ALL SUBSEQUENT DOWNRUPTS
046844,000175: 05,3527 54334 TS DNTMGOTO # GO TO DNPHASE2
046845,000176: 05,3530 13544 TCF NEWLIST
046846,000177: 05,3531 10335 DNPHASE2 CCS DNECADR # SENDING OF DATA IN PROGRESS
046847,000178: 05,3532 03661 DODNADR TC FETCH2WD # YES - THEN FETCH THE NEXT 2 SP WORDS
046848,000179: 05,3533 77753 MINTIME2 -1DNADR TIME2 # NEGATIVE OF TIME2 1DNADR
046849,000180: 05,3534 13535 TCF +1 # (ECADR OF 3776 + 74001 = 77777)
046850,000181:
046851,000182: 05,3535 10336 CCS SUBLIST # IS THE SUBLIST IN CONTROL
046852,000183: 05,3536 13674 TCF NEXTINSL # YES
046853,000184: 05,3537 74001 DNADRDCR OCT 74001 # DNADR COUNT AND ECADR DECREMENTER
046854,000185:
046855,000186: 05,3540 30333 CHKLIST CA CTLIST
046856,000187: 05,3541 00006 EXTEND
046857,000188: 05,3542 63544 BZMF NEWLIST # IT WILL BE NEGATIVE AT END OF LIST
046858,000189: 05,3543 13551 TCF NEXTINCL
046859,000190: 05,3544 50332 NEWLIST INDEX DNLSTCOD
046860,000191: 05,3545 32335 CA DNTABLE # INITIALIZE CTLIST WITH
046861,000192: 05,3546 54333 TS CTLIST # STARTING ADDRESS OF NEW LIST
046862,000193: 05,3547 40332 CS DNLSTCOD
046863,000194: 05,3550 13763 TCF SENDID +3
046864,000195: 05,3551 50333 NEXTINCL INDEX CTLIST
046865,000196: 05,3552 30000 CA 0
046866,000197: 05,3553 10000 CCS A
046867,000198: 05,3554 24333 INCR CTLIST # SET POINTER TO PICK UP NEXT CTLIST WORD
046868,000199: 05,3555 13561 TCF +4 # ON NEXT ENTRY TO PROG. (A SHOULD NOT =0)
046869,000200: 05,3556 56333 XCH CTLIST # SET CTLIST TO NEGATIVE AND PLACE(CODING)
046870,000201: 05,3557 40000 COM # UNCOMPLEMENTED DNADR INTO A. (FOR LA)
046871,000202: 05,3560 56333 XCH CTLIST # (ST IN )
046872,000203: 05,3561 24000 +4 INCR A # (CTLIST)
046873,000204: 05,3562 54335 TS DNECADR # SAVE DNADR
046874,000205: 05,3563 63533 AD MINTIME2 # TEST FOR TIME2 (NEG. OF ECADR)
046875,000206: 05,3564 10000 CCS A
046876,000207: 05,3565 13571 TCF SETWO +1 # DON'T SET WORD ORDER CODE
046877,000208: 05,3566 47777 MINB1314 OCT 47777 # MINUS BIT 13 AND 14 (CAN'T GET HERE)
046878,000209: 05,3567 13571 TCF SETWO +1 # DON'T SET WORD ORDER CODE
046879,000210: 05,3570 03613 SETWO TC WOZERO # GO SET WORD ORDER CODE TO ZERO.
046880,000211: 05,3571 30335 +1 CA DNECADR # RELOAD A WITH THE DNADR.
046881,000212: 05,3572 63566 +2 AD MINB1314 # IS THIS A REGULAR DNADR?
046882,000213: 05,3573 00006 EXTEND
046883,000214: 05,3574 63661 BZMF FETCH2WD # YES. (A MUST NEVER BE ZERO)
046884,000215: 05,3575 67710 AD MINB12 # NO- IS IT A POINTER (DNPTR) OR A
046885,000216: 05,3576 00006 EXTEND # CHANNEL(DNCHAN)
046886,000217: 05,3577 63617 BZMF DODNPTR # IT'S A POINTER. (A MUST NEVER BE ZERO)
046887,000218:
046888,000219: 05,3600 00006 DODNCHAN TC 6 # (EXECUTED AS EXTEND) IT S A CHANNEL
046889,000220: 05,3601 50335 INDEX DNECADR
046890,000221: 05,3602 44000 INDEX 0 -4000 # (EXECUTED AS READ)
046891,000222: 05,3603 54001 TS L
046892,000223: 05,3604 00006 TC 6 # (EXECUTED AS EXTEND)
046893,000224: 05,3605 50335 INDEX DNECADR
046894,000225: 05,3606 43777 INDEX 0 -4001 # (EXECUTED AS READ)
046895,000226: 05,3607 54335 TS DNECADR # SET DNECADR
046896,000227: 05,3610 37716 CA NEGONE # TO MINUS
046897,000228: 05,3611 56335 XCH DNECADR # WHILE PRESERVING A.
046898,000229: 05,3612 13707 TCF DNTMEXIT # GO SEND CHANNELS
046899,000230:
046900,000231: 05,3613 45025 WOZERO CS BIT7
046901,000232: 05,3614 00006 EXTEND
046902,000233: 05,3615 03013 WAND CHAN13 # SET WORD ORDER CODE TO ZERO
046903,000234: 05,3616 00002 TC Q # RETURN TO CALLER
046904,000235:
046905,000236: 05,3617 50335 DODNPTR INDEX DNECADR # DNECADR CONTAINS ADRES OF SUBLIST
046906,000237: 05,3620 00000 0 0 # CLEAR AND ADD LIST ENTRY INTO A.
046907,000238: 05,3621 10000 CCS A # IS THIS A SNAPSHOT SUBLIST
046908,000239: 05,3622 30335 CA DNECADR # NO, IT IS A REGULAR SUBLIST.
046909,000240: 05,3623 13673 TCF DOSUBLST # A MUST NOT BE ZERO.
046910,000241:
046911,000242: 05,3624 56335 XCH DNECADR # YES, IT IS A SNAPSHOT SUBLIST.
046912,000243: 05,3625 54336 TS SUBLIST # C(DNECADR) INTO SUBLIST
046913,000244: 05,3626 35035 CAF ZERO # A INTO A
046914,000245: 05,3627 56335 XCH TMINDEX # (NOTE.. TMINDEX = DNECADR)
046915,000246:
046916,000247: # THE FOLLOWING CODING (FROM SNAPLOOP TO SNAPEND) IS FOR THE PURPOSE OF TAKING A SNAPSHOT OF 12 DP REGISTERS.
046917,000248: # THIS IS DONE BY SAVING 11 DP REGISTERS IN DNTMBUFF AND SENDING THE FIRST DP WORD IMMEDIATELY.
046918,000249: # THE SNAPSHOT PROCESSING IS THE MOST TIME CONSUMING AND THEREFORE THE CODING AND LIST STRUCTURE WERE DESIGNED
046919,000250: # TO MINIMIZE TIME. THE TIME OPTIMIZATION RESULTS IN RULES UNIQUE TO THE SNAPSHOT PORTION OF THE DOWNLIST.
046920,000251: # THESE RULES ARE ......
046921,000252: # 1. ONLY 1DNADR'S CAN APPEAR IN THE SNAPSHOT SUBLIST
046922,000253: # 2. THE 1DNADR'S CANNOT REFER TO THE FIRST LOCATION IN ANY BANK.
046923,000254:
046924,000255: 05,3630 54003 SNAPLOOP TS EBANK # SET EBANK
046925,000256: 05,3631 74373 MASK LOW8 # ISOLATE RELATIVE ADDRESS
046926,000257: 05,3632 00006 EXTEND
046927,000258: 05,3633 50000 INDEX A
046928,000259: 05,3634 E3,1401 EBANK= 1401
046929,000260: 05,3634 31402 DCA 1401 # PICK UP 2 SNAPSHOT WORDS.
046930,000261: 05,3635 0337 EBANK= DNTMBUFF
046931,000262: 05,3635 50335 INDEX TMINDEX
046932,000263: 05,3636 52340 DXCH DNTMBUFF # STORE 2 SNAPSHOT WORDS IN BUFFER
046933,000264: 05,3637 24335 INCR TMINDEX # SET BUFFER INDEX FOR NEXT 2 WORDS.
046934,000265: 05,3640 24335 INCR TMINDEX
046935,000266: 05,3641 24336 SNAPAGN INCR SUBLIST # SET POINTER TO NEXT 2 WORDS OF SNAPSHOT
046936,000267: 05,3642 50336 INDEX SUBLIST
046937,000268: 05,3643 00000 0 0 # = CA SSSS (SSSS = NEXT ENTRY IN SUBLIST)
046938,000269: 05,3644 10000 CCS A # TEST FOR LAST TWO WORDS OF SNAPSHOT.
046939,000270: 05,3645 13630 TCF SNAPLOOP # NOT LAST TWO.
046940,000271: 05,3646 03531 LDNPHAS2 GENADR DNPHASE2
046941,000272: 05,3647 54336 TS SUBLIST # YES, LAST. SAVE A.
046942,000273: 05,3650 37716 CA NEGONE # SET DNECADR AND
046943,000274: 05,3651 54335 TS DNECADR # SUBLIST POINTERS
046944,000275: 05,3652 56336 XCH SUBLIST # TO NEGATIVE VALUES.
046945,000276: 05,3653 54003 TS EBANK
046946,000277: 05,3654 74373 MASK LOW8
046947,000278: 05,3655 00006 EXTEND
046948,000279: 05,3656 50000 INDEX A
046949,000280: 05,3657 E3,1401 EBANK= 1401
046950,000281: 05,3657 31402 DCA 1401 # PICK UP FIRST 2 WORDS OF SNAPSHOT.
046951,000282: 05,3660 0337 EBANK= DNTMBUFF
046952,000283: 05,3660 13707 SNAPEND TCF DNTMEXIT # NOW GO SEND THEM.
046953,000284:
046954,000285: 05,3661 30335 FETCH2WD CA DNECADR
046955,000286: 05,3662 54003 TS EBANK # SET EBANK
046956,000287: 05,3663 74373 MASK LOW8 # ISOLATE RELATIVE ADDRESS
046957,000288: 05,3664 54001 TS L
046958,000289: 05,3665 33537 CA DNADRDCR # DECREMENT COUNT AND ECADR
046959,000290: 05,3666 26335 ADS DNECADR
046960,000291: 05,3667 00006 EXTEND
046961,000292: 05,3670 50001 INDEX L
046962,000293: 05,3671 E3,1400 EBANK= 1400
046963,000294: 05,3671 31401 DCA 1400 # PICK UP 2 DATA WORDS
046964,000295: 05,3672 0337 EBANK= DNTMBUFF
046965,000296: 05,3672 13707 TCF DNTMEXIT # NOW GO SEND THEM.
046966,000297:
046967,000298: 05,3673 54336 DOSUBLST TS SUBLIST # SET SUBLIST POINTER
046968,000299: 05,3674 50336 NEXTINSL INDEX SUBLIST
046969,000300: 05,3675 00000 0 0 # = CA SSSS (SSSS = NEXT ENTRY IN SUBLIST)
046970,000301: 05,3676 10000 CCS A # IS IT THE END OF THE SUBLIST
046971,000302: 05,3677 24336 INCR SUBLIST # NO-
046972,000303: 05,3700 13704 TCF +4
046973,000304: 05,3701 54336 TS SUBLIST # SAVE A.
046974,000305: 05,3702 37716 CA NEGONE # SET SUBLIST TO MINUS
046975,000306: 05,3703 56336 XCH SUBLIST # RETRIEVE A.
046976,000307: 05,3704 24000 +4 INCR A
046977,000308: 05,3705 54335 TS DNECADR # SAVE DNADR
046978,000309: 05,3706 13572 TCF SETWO +2 # GO USE COMMON CODING (PROBLEMS WOULD
046979,000310: # OCCUR IF THE PROGRAM ENCOUNTERED A
046980,000311: # DNPTR NOW)
046981,000312:
046982,000313: 05,3707 00006 DNTMEXIT EXTEND # DOWN-TELEMETRY EXIT
046983,000314: 05,3710 01034 WRITE DNTM1 # TO SEND A + L TO CHANNELS 34 + 35
046984,000315: 05,3711 30001 CA L # RESPECTIVELY
046985,000316: 05,3712 00006 TMEXITL EXTEND
046986,000317: 05,3713 01035 WRITE DNTM2
046987,000318: 05,3714 15347 TMRESUME TCF RESUME # EXIT TELEMETRY PROGRAM VIA RESUME.
046988,000319:
046989,000320: 05,3715 7710 MINB12 EQUALS -1/8
046990,000321: 05,3715 0335 DNECADR EQUALS TMINDEX
046991,000322: 05,3715 0333 CTLIST EQUALS LDATALST
046992,000323: 05,3715 0336 SUBLIST EQUALS DNQ
046993,000324:
046994,000325: # SUBROUTINE NAME - DNDUMP
046995,000326:
046996,000327: # FUNCTIONAL DESCRIPTION - TO SEND (DUMP) ALL 8 BANKS OF ERASABLE STORAGE TWICE. BANKS ARE SENT ONE AT A TIME
046997,000328: # EACH BANK IS PRECEEDED BY AN ID WORD, SYNCH BITS, ECADR AND TIME1 FOLLOWED BY THE 256D WORDS OF EACH
046998,000329: # EBANK. EBANKS ARE DUMPED IN ORDER (I.E. EBANK 0 FIRST, THEN EBANK1 ETC.)
046999,000330:
047000,000331: # CALLING SEQUENCE- THE GROUND OR ASTRONAUT BY KEYING V74E CAN INITIALIZE THE DUMP.
047001,000332: # AFTER KEYING IN V74E THE CURRENT DOWNLIST WILL BE IMMEDIATELY TERMINATED AND THE DOWNLINK ERASABLE DUMP
047002,000333: # WILL BEGIN.
047003,000334:
047004,000335: # ONCE INITIATED THE DOWNLINK ERASABLE DUMP CAN BE TERMINATED (AND INTERRUPTED DOWNLIST REINSTATED) ONLY
047005,000336: # BY THE FOLLOWING:
047006,000337: # 1. A FRESH START
047007,000338: # 2. COMPLETION OF BOTH COMPLETE DUMPS
047008,000339: # 3. AND INVOLUNTARILY BY A RESTART.
047009,000340: # NORMAL EXIT MODE- TCF DNPHASE1
047010,000341:
047011,000342: # ALARM OR ABORT MODE- NONE
047012,000343:
047013,000344: # *SUBROUTINES CALLED- NONE.
047014,000345:
047015,000346: # ERASABLE INITIALIZATION REQUIRED-
047016,000347: # NONE
047017,000348: # DEBRIS- DUMPLOC, DUMPSW, DNTMGOTO, EBANK AND CENTRAL REGISTERS
047018,000349:
047019,000350: # TIMING- TIME (IN SECS) = ((NO.DUMPS)*(NO.EBANKS)*(WDSPEREBANK + NO.IDWDS)) / NO.WDSPERSEC
047020,000351: # TIME (IN SECS) = ( 4 )*( 8 )*( 256 + 4 ) / 100
047021,000352: # THUS TIME (IN SECS TO SEND DUMP OF ERASABLE 4 TIMES VIA DOWNLINK) = 83.2 SECONDS
047022,000353:
047023,000354: # STRUCTURE OF ONE EBANK AS IT IS SENT BY DOWNLINK PROGRAM-
047024,000355: # (REMINDER-THIS ONLY DESCRIBES ONE OF THE 8 EBANKS X 4 (DUMPS) = 32 EBANKS WHICH WILL BE SENT BY DNDUMP)
047025,000356:
047026,000357: # DOWNLIST W
047027,000358: # WORD TAKEN FROM CONTENTS OF EXAMPLE O COMMENTS
047028,000359: # 1 ERASID 0177X 0 DOWNLIST I.D. FOR DOWNLINK ERASABLE DUMP (X=7 CSM, 6 LM)
047029,000360: # 2 LOWIDCOD 77340 1 DOWNLINK SYNCH BITS. (SAME ONE USED IN ALL OTHER DOWNLISTS)
047030,000361: # 3 DUMPLOC 13400 1 (SEE NOTES ON DUMPLOC) 1 = 3RD ERAS DUMP, 3400=ECADR OF 5TH WD
047031,000362: # 4 TIME1 14120 1 TIME IN CENTISECONDS
047032,000363: # 5 FIRST WORD OF EBANK X 03400 1 IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1400 (ECADR 3400)
047033,000364: # 6 2ND WORD OF EBANK X 00142 1 IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1401 (ECADR 3401)
047034,000365: # 7 3RD WORD OF EBANK X 00142 1 IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1402 (ECADR 3402)
047035,000366: # . 1
047036,000367: # . 1
047037,000368: # . 1
047038,000369: # 260D 256TH WORD OF EBANK X 03777 1 IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1777 (ECADR 3777)
047039,000370:
047040,000371: # NOTE- DUMPLOC CONTAINS THE COUNTER AND ECADR FOR EACH WORD BEING SENT.
047041,000372: # THE BIT STRUCTURE OF DUMPLOC IS FOLLOWS---
047042,000373: # X = NOT USED
047043,000374: # X ABC EEE RRRRRRRR ABC = ERASABLE DUMP COUNTER (I.E. ABC = 0,1,2 OR 3 WHICH MEANS THAT
047044,000375: # COMPLETE ERASABLE DUMP NUMBER 1,2,3 OR 4 RESPECTIVELY IS IN PROGRESS)
047045,000376: # EEE = EBANK BITS
047046,000377: # RRRRRRRR = RELATIVE ADDRESS WITHIN AN EBANK.
047047,000378:
047048,000379: 05,3715 35035 DNDUMPI CA ZERO # INITIALIZE DOWNLINK
047049,000380: 05,3716 54335 TS DUMPLOC # ERASABLE DUMP
047050,000381: 05,3717 03760 +2 TC SENDID # GO SEND ID AND SYNCH BITS
047051,000382: 05,3720 33727 CA LDNDUMP1 # SET DNTMGOTO
047052,000383: 05,3721 54334 TS DNTMGOTO # TO LOCATION FOR NEXT PASS
047053,000384: 05,3722 30025 CA TIME1 # PLACE TIME1
047054,000385: 05,3723 56001 XCH L # INTO L
047055,000386: 05,3724 30335 CA DUMPLOC # AND ECADR OF THIS EBANK INTO A
047056,000387: 05,3725 13707 TCF DNTMEXIT # SEND DUMPLOC AND TIME1
047057,000388:
047058,000389: 05,3726 03730 LDNDUMP ADRES DNDUMP
047059,000390: 05,3727 03742 LDNDUMP1 ADRES DNDUMP1
047060,000391:
047061,000392: 05,3730 35032 DNDUMP CA TWO # INCREMENT ECADR IN DUMPLOC
047062,000393: 05,3731 26335 ADS DUMPLOC # TO NEXT DP WORD TO BE
047063,000394: 05,3732 74373 MASK LOW8 # DUMPED AND SAVE IT.
047064,000395: 05,3733 10000 CCS A # IS THIS THE BEGINNING OF A NEW EBANK
047065,000396: 05,3734 13744 TCF DNDUMP2 # NO- THEN CONTINUE DUMPING
047066,000397: 05,3735 30335 CA DUMPLOC # YES- IS THIS THE END OF THE
047067,000398: 05,3736 75017 MASK BIT13 # SECOND COMPLETE ERASABLE DUMP?
047068,000399: 05,3737 00006 EXTEND
047069,000400: 05,3740 13717 BZF DNDUMPI +2 # NO - GO BACK AND INITIALIZE NEXT BANK
047070,000401: 05,3741 13523 TCF DNPHASE1 # YES - SEND DOWNLIST AGAIN
047071,000402: 05,3742 33726 DNDUMP1 CA LDNDUMP # SET DNTMGOTO
047072,000403: 05,3743 54334 TS DNTMGOTO # FOR WORDS 3 TO 256D OF CURRENT EBANK
047073,000404:
047074,000405: 05,3744 30335 DNDUMP2 CA DUMPLOC
047075,000406: 05,3745 54003 TS EBANK # SET EBANK
047076,000407: 05,3746 74373 MASK LOW8 # ISOLATE RELATIVE ADDRESS.
047077,000408: 05,3747 54002 TS Q # (NOTE: MASK INSTRUCTION IS USED TO PICK
047078,000409: 05,3750 35034 CA NEG0 # UP ERASABLE REGISTERS SO THAT EDITING
047079,000410: 05,3751 54001 TS L # REGISTERS 20-23 WILL NOT BE ALTERED.)
047080,000411: 05,3752 50002 INDEX Q
047081,000412: 05,3753 E3,1400 EBANK= 1400 # PICK UP LOW ORDER REGISTER OF PAIR
047082,000413: 05,3753 71401 MASK 1401 # OF ERASABLE REGISTERS.
047083,000414: 05,3754 56001 XCH L
047084,000415: 05,3755 50002 INDEX Q # PICK UP HIGH ORDER REGISTER OF PAIR
047085,000416: 05,3756 71400 MASK 1400 # OF ERASABLE REGISTERS.
047086,000417: 05,3757 0337 EBANK= DNTMBUFF
047087,000418: 05,3757 13707 TCF DNTMEXIT # GO SEND THEM
047088,000419:
047089,000420: 05,3760 00006 SENDID EXTEND # ** ENTRANCE USED BY ERASABLE DUMP PROG. **
047090,000421: 05,3761 22334 QXCH DNTMGOTO # SET DNTMGOTO SO NEXT TIME PROG WILL GO
047091,000422: 05,3762 35070 CAF ERASID # TO LOCATION FOLLOWING :TC SENDID:
047092,000423:
047093,000424: 05,3763 54001 TS L # ** ENTRANCE USED BY REGULAR DOWNLINK PG **
047094,000425: 05,3764 03613 TC WOZERO # GO SET WORD ORDER CODE TO ZERO
047095,000426: 05,3765 32000 CAF LOWIDCOD # PLACE SPECIAL ID CODE INTO L
047096,000427: 05,3766 56001 XCH L # AND ID BACK INTO A
047097,000428: 05,3767 13707 TCF DNTMEXIT # SEND DOWNLIST ID CODE(S).
End of include-file DOWN-TELEMETRY_PROGRAM.agc. Parent file is MAIN.agc