Source Code
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This is a reconstruction of the AGC program Luminary 99 Rev 0. It was the
second release of the Lunar Module flight software targeted for use in Apollo 11, after Luminary 97.
A bug (which had been around since at least Apollo 10, Luminary 69) was
discovered in Rev 0 shortly before the Apollo 11 flight, resulting in a last minute
revision into Rev 1,
which is what actually flew rather than
the Rev 0 presented here. A hardcopy of Rev 0 is known to
exist — it belonged to AGC developer Allan Klumpp for many years — but
unfortunately the Virtual AGC Project has not had access to that hardcopy. Thus
the code you see here had been reconstructed (we believe accurately) rather than
transcribed. The first step of the reconstruction of the Rev 0 source code was
the transcription of the Rev 1 source code from a hardcopy in the MIT Museum collection.
The process of reverting the active portion of the source code (i.e., other than
program comments) from Rev 1 to Rev 0 was very minor, consisting
only of moving the position of the STARTSB1 label in
FRESH START AND RESTART. Allan had previously given
us the checksums of the memory banks of Rev 0, and we have verified the program presented here has checksums
identical to all banks of Allan's listing of Rev 0. The notations on Allan's Rev 0 program listing read,
in part:GAP: ASSEMBLE REVISION 099 OF AGC PROGRAM LUMINARY BY NASA 2021112-051 A single program comment is known to differ between Rev 0 and Rev 1, but these are harder to reconstruct and verify than changes to the active portion of the code. Thus it is possible that there are additional differences between the program comments in Rev 0 and Rev 1 that are unknown to us, and therefore are not reflected in the code presented here. |
043840,000002: ## Copyright: Public domain.
043841,000003: ## Filename: DOWN-TELEMETRY_PROGRAM.agc
043842,000004: ## Purpose: Part of the reconstructed source code for LMY99 Rev 0,
043843,000005: ## otherwise known as Luminary Rev 99, the second release
043844,000006: ## of the Apollo Guidance Computer (AGC) software for Apollo 11.
043845,000007: ## It differs from LMY99 Rev 1 (the flown version) only in the
043846,000008: ## placement of a single label. The corrections shown here have
043847,000009: ## been verified to have the same bank checksums as AGC developer
043848,000010: ## Allan Klumpp's copy of Luminary Rev 99, and so are believed
043849,000011: ## to be accurate. This file is intended to be a faithful
043850,000012: ## recreation, except that the code format has been changed to
043851,000013: ## conform to the requirements of the yaYUL assembler rather than
043852,000014: ## the original YUL assembler.
043853,000015: ##
043854,000016: ## Assembler: yaYUL
043855,000017: ## Contact: Ron Burkey <info@sandroid.org>.
043856,000018: ## Website: www.ibiblio.org/apollo.
043857,000019: ## Pages: 988-997
043858,000020: ## Mod history: 2009-05-24 RSB Adapted from the corresponding
043859,000021: ## Luminary131 file, using page
043860,000022: ## images from Luminary 1A.
043861,000023: ## 2011-01-06 JL Fixed pseudo-label indentation.
043862,000024: ## 2016-12-17 RSB Proofed text comments with octopus/ProoferComments
043863,000025: ## and corrected the errors found.
043864,000026: ## 2017-01-28 RSB Back-ported some comment-text fixes
043865,000027: ## identified from Luminary 69.
043866,000028: ## 2017-03-13 RSB Comment-text fixes noted in proofing Luminary 116.
043867,000029: ## 2017-03-15 RSB Comment-text fixes identified in 5-way
043868,000030: ## side-by-side diff of Luminary 69/99/116/131/210.
043869,000031: ## 2017-08-01 MAS Created from LMY99 Rev 1.
043870,000032:
043871,000033: ## This source code has been transcribed or otherwise adapted from
043872,000034: ## digitized images of a hardcopy from the MIT Museum. The digitization
043873,000035: ## was performed by Paul Fjeld, and arranged for by Deborah Douglas of
043874,000036: ## the Museum. Many thanks to both. The images (with suitable reduction
043875,000037: ## in storage size and consequent reduction in image quality as well) are
043876,000038: ## available online at www.ibiblio.org/apollo. If for some reason you
043877,000039: ## find that the images are illegible, contact me at info@sandroid.org
043878,000040: ## about getting access to the (much) higher-quality images which Paul
043879,000041: ## actually created.
043880,000042: ##
043881,000043: ## The code has been modified to match LMY99 Revision 0, otherwise
043882,000044: ## known as Luminary Revision 99, the Apollo 11 software release preceeding
043883,000045: ## the listing from which it was transcribed. It has been verified to
043884,000046: ## contain the same bank checksums as AGC developer Allan Klumpp's listing
043885,000047: ## of Luminary Revision 99 (for which we do not have scans).
043886,000048: ##
043887,000049: ## Notations on Allan Klumpp's listing read, in part:
043888,000050: ##
043889,000051: ## ASSEMBLE REVISION 099 OF AGC PROGRAM LUMINARY BY NASA 2021112-51
043890,000052:
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Page 988 |
043892,000054: # PROGRAM NAME - DOWN TELEMETRY PROGRAM
043893,000055: # MOD NO. - 0 TO COMPLETELY REWRITE THE DOWN TELEMETRY PROGRAM AND DOWNLINK ERASABLE DUMP PROGRAM FOR THE
043894,000056: # PURPOSE OF SAVING APPROXIMATELY 150 WORDS OF CORE STORAGE.
043895,000057: # THIS CHANGE REQUIRES AN ENTIRELY NEW METHOD OF SPECIFYING DOWNLINK LISTS. REFER TO DOWNLINK
043896,000058: # LISTS LOG SECTION FOR MORE DETAILS. HOWEVER THIS CHANGE WILL NOT AFFECT THE GROUND PROCESSING
043897,000059: # OF DOWN TELEMETRY DATA.
043898,000060: # MOD BY - KILROY, SMITH, DEWITT
043899,000061: # DATE - 02 OCT 67
043900,000062: # AUTHORS - KILROY, SMITH, DEWITT, DEWOLF, FAGIN
043901,000063: # LOG SECTION - DOWN-TELEMETRY PROGRAM
043902,000064:
043903,000065: # FUNCTIONAL DESCRIPTION - THIS ROUTINE IS INITIATED BY TELEMETRY END
043904,000066: # PULSE FROM THE DOWNLINK TELEMETRY CONVERTER. THIS PULSE OCCURS
043905,000067: # AT 50 TIMES PER SEC (EVERY 20 MS) THEREFORE DODOWNTM IS
043906,000068: # EXECUTED AT THESE RATES. THIS ROUTINE SELECTS THE APPROPRIATE
043907,000069: # AGC DATA TO BE TRANSMITTED DOWNLINK AND LOADS IT INTO OUTPUT
043908,000070: # CHANNELS 34 AND 35. THE INFORMATION IS THEN GATED OUT FROM THE
043909,000071: # LGC IN SERIAL FASHION.
043910,000072:
043911,000073: # THIS PROGRAM IS CODED FOR A 2 SECOND DOWNLIST. SINCE DOWNRUPTS
043912,000074: # OCCUR EVERY 20 MS AND 2 AGC COMPUTER WORDS CAN BE PLACED IN
043913,000075: # CHANNELS 34 AND 35 DURING EACH DOWNRUPT THE PROGRAM IS CAPABLE
043914,000076: # OF SENDING 200 AGC WORDS EVERY 2 SECONDS.
043915,000077:
043916,000078: # CALLING SEQUENCE - NONE
043917,000079: # PROGRAM IS ENTERED VIA TCF DODOWNTM WHICH IS EXECUTED AS A
043918,000080: # RESULT OF A DOWNRUPT. CONTROL IS RETURNED VIA TCF RESUME WHICH
043919,000081: # IN EFFECT IS A RESUME.
043920,000082:
043921,000083: # SUBROUTINES CALLED - NONE
043922,000084:
043923,000085: # NORMAL EXIT MODE - TCF RESUME
043924,000086:
043925,000087: # ALARM OR ABORT EXIT MODE - NONE
043926,000088:
043927,000089: # RESTART PROTECTION:
043928,000090: # ON A FRESH START AND RESTART THE 'STARTSUB' SUBROUTINE WILL INITIALIZE THE DOWNLIST POINTER (ACTUALLY
043929,000091: # DNTMGOTO) TO THE BEGINNING OF THE CURRENT DOWNLIST (I.E. CURRENT CONTENTS OF DNLSTADR). THIS HAS THE
043930,000092: # EFFECT OF IGNORING THE REMAINDER OF THE DOWNLIST WHICH THE DOWN-TELEMETRY PROGRAM WAS WORKING ON WHEN
043931,000093: # THE RESTART (OR FRESH START) OCCURRED AND RESUME DOWN TELEMETRY FROM THE BEGINNING OF THE CURRENT
043932,000094: # DOWNLIST.
043933,000095:
043934,000096: # ALSO OF INTEREST IS THE FACT THAT ON A RESTART THE AGC WILL ZERO DOWNLINK CHANNELS 13, 34 AND 35.
043935,000097:
043936,000098: # DOWNLINK LIST SELECTION:
043937,000099: # THE APPROPRIATE DOWNLINK LISTS ARE SELECTED BY THE FOLLOWING:
043938,000100: # 1. FRESH START
043939,000101: # 2. V37EXXE WHERE XX = THE MAJOR MODE BEING SELECTED.
043940,000102: # 3. UPDATE PROGRAM (P27)
043941,000103: # 4. NON-V37 SELECTABLE TYPE PROGRAMS (E.G. AGS INITIALIZATION (SUNDANCE, LUMINARY) AND P61-P62
043942,000104: # TRANSITION (COLOSSUS) ETC.).
043943,000105:
043944,000106: # DOWNLINK LIST RULES AND LIMITATIONS:
043945,000107: # READ SECTION(S) WHICH FOLLOW 'DEBRIS' WRITEUP.
043946,000108:
043947,000109: # OUTPUT - EVERY 2 SECONDS 100 DOUBLE PRECISION WORDS (I.E. 200 LGC
043948,000110: # COMPUTER WORDS) ARE TRANSMITTED VIA DOWNLINK.
043949,000111:
043950,000112: # ERASABLE INITIALIZATION REQUIRED - NONE
043951,000113: # 'DNTMGOTO' AND 'DNLSTADR' ARE INITIALIZED BY THE FRESH START PROGRAM.
043952,000114:
043953,000115: # DEBRIS (ERASABLE LOCATIONS DESTROYED BY THIS PROGRAM) -
043954,000116: # LDATALST, DNTMBUFF TO DNTMBUFF +21D, TMINDEX, DNQ.
043955,000117:
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043958,000120:
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043960,000122: # DODOWNTM IS ENTERED EVERY 20 MS BY AN INTERRUPT TRIGGERED BY THE
043961,000123: # RECEIPT OF AN ENDPULSE FROM THE SPACECRAFT TELEMETRY PROGRAMMER.
043962,000124:
043963,000125: # NOTES REGARDING DOWNLINK LISTS ASSOCIATED WITH THIS PROGRAM:
043964,000126: # 1. DOWNLISTS. - DOWNLISTS MUST BE COMPILED IN THE SAME BANK AS THE
043965,000127: # DOWN-TELEMETRY PROGRAM. THIS IS DONE FOR EASE OF CODING, FASTER
043966,000128: # EXECUTION.
043967,000129: # 2. EACH DOWNLINK LIST CONSISTS OF A CONTROL LIST AND A NUMBER OF
043968,000130: # SUBLISTS.
043969,000131: # 3. A SUBLIST REFERS TO A SNAPSHOT OR DATA COMMON TO THE SAME OR OTHER
043970,000132: # DOWNLINK LISTS. ANY SUBLIST CONTAINING COMMON DATA NEEDS TO BE
043971,000133: # CODED ONLY ONCE FOR THE APPLICABLE DOWNLINK LISTS.
043972,000134: # 4. SNAPSHOT SUBLISTS REFER SPECIFICALLY TO HOMOGENOUS DATA WHICH MUST BE
043973,000135: # SAVED IN A BUFFER DURING ONE DOWNRUPT.
043974,000136: # 5. THE 1DNADR FOR THE 1ST WORD OF SNAPSHOT DATA IS FOUND AT THE END
043975,000137: # OF EACH SNAPSHOT SUBLIST, SINCE THE PROGRAM CODING SENDS THIS DP WORD
043976,000138: # IMMEDIATELY AFTER STORING THE OTHERS IN THE SNAPSHOT BUFFER.
043977,000139: # 6. ALL LISTS ARE COMBINATIONS OF CODED ERASABLE ADDRESS CONSTANTS
043978,000140: # CREATED FOR THE DOWNLIST PROGRAM.
043979,000141: # A. 1DNADR 1-WORD DOWNLIST ADDRESS.
043980,000142: # SAME AS ECADR, BUT USED WHEN THE WORD ADDRESSED IS THE LEFT
043981,000143: # HALF OF A DOUBLE-PRECISION WORD FOR DOWN TELEMETRY.
043982,000144: # B. 2DNADR - 6DNADR N-WORD DOWNLIST ADDRESS, N = 2 - 6.
043983,000145: # SAME AS 1DNADR, BUT WITH THE 4 UNUSED BITS OF THE ECADR FORMAT
043984,000146: # FILLED IN WITH 0001-0101. USED TO POINT TO A LIST OF N DOUBLE-
043985,000147: # PRECISION WORDS, STORED CONSECUTIVELY, FOR DOWN TELEMETRY.
043986,000148: # C. DNCHAN DOWNLIST CHANNEL ADDRESS.
043987,000149: # SAME AS 1DNADR, BUT WITH PREFIX BITS 0111. USED TO POINT TO
043988,000150: # A PAIR OF CHANNELS FOR DOWN TELEMETRY.
043989,000151: # D. DNPTR DOWN TELEMETRY SUBLIST POINTER.
043990,000152: # SAME AS CAF BUT TAGGED AS A CONSTANT. USED IN CONTROL LIST TO POINT TO A SUBLIST.
043991,000153: # CAUTION --- A DNPTR CANNOT BE USED IN A SUBLIST.
043992,000154: # 7. THE WORD ORDER CODE IS SET TO ZERO AT THE BEGINNING OF EACH DOWNLIST (I.E. CONTROL LIST) AND WHEN
043993,000155: # A '1DNADR TIME2' IS DETECTED IN THE CONTROL LIST (ONLY).
043994,000156: # 8. IN THE SNAPSHOT SUBLIST ONLY, THE DNADR'S CANNOT POINT TO THE FIRST WORD OF ANY EBANK.
043995,000157:
043996,000158: # DOWNLINK LIST RESTRICTIONS:
043997,000159: # (THE FOLLOWING POINTS MAY BE LISTED ELSEWHERE BUT ARE LISTED HERE SO IT IS CLEAR THAT THESE THINGS CANNOT BE
043998,000160: # DONE)
043999,000161: # 1. SNAPSHOT DOWNLIST:
044000,000162: # (A) CANNOT CONTAIN THE FOLLOWING ECADRS (I.E. 1DNADR'S): 0, 400, 1000, 1400, 2000, 2400, 3000, 3400.
044001,000163: # (B) CAN CONTAIN ONLY 1DNADR'S
044002,000164: # 2. ALL DOWNLINKED DATA (EXCEPT CHANNELS) IS PICKED UP BY A <DCA<SO DOWNLINK LISTS CANNOT CONTAIN THE
044003,000165: # EQUIVALENT OF THE FOLLOWING ECADRS (I.E. IDNADRS): 377, 777, 1377, 1777, 2377, 27777, 3377, 3777.
044004,000166: # (NOTE: THE TERM EQUIVALENT ' MEANT THAT THE IDNADR TO 6DNADR WILL BE PROCESSED LIKE 1 TO 6 ECADRS)
044005,000167: # 3. CONTROL LISTS AND SUBLISTS CANNOT HAVE ENTRIES = OCTAL 00000 OR OCTAL 77777
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Page 991 |
044007,000169: # 4. THE '1DNADR TIME2' WHICH WILL CAUSE THE DOWNLINK PROGRAM TO SET THE WORDER CODE TO 3 MUST APPEAR IN THE
044008,000170: # CONTROL SECTION OF THE DOWNLIST.
044009,000171: # 5. 'DNCHAN 0' CANNOT BE USED.
044010,000172: # 6. 'DNPTR 0' CANNOT BE USED.
044011,000173: # 7. DNPTR CANNOT APPEAR IN A SUBLIST.
044012,000174:
044013,000175: # EBANK SETTINGS
044014,000176: # IN THE PROCESS OF SETTING THE EBANK (WHEN PICKING UP DOWNLINK DATA) THE DOWN TELEMETRY PROGRAM PUTS
044015,000177: # 'GARBAGE' INTO BITS15-12 OF EBANK. HUGH BLAIR-SMITH WARNS US THAT BITS15-12 OF EBANK MAY BECOME
044016,000178: # SIGNIFICANT SOMEDAY IN THE FUTURE. IF/WHEN THAT HAPPENS, THE PROGRAM SHOULD INSURE (BY MASKING ETC.)
044017,000179: # THAT BITS 15-12 OF EBANK ARE ZERO.
044018,000180:
044019,000181: # INITIALIZATION REQUIRED - TO INTERRUPT CURRENT LIST AND START A NEW ONE..
044020,000182: # 1. ADRES OF DOWNLINK LIST INTO DNLSTADR
044021,000183: # 2. NEGONE INTO SUBLIST
044022,000184: # 3. NEGONE INTO DNECADR
044023,000185:
044024,000186: 22,3711 BANK 22
044025,000187: 05,2000 SETLOC DOWNTELM
044026,000188: 05,2000 BANK
044027,000189:
044028,000190: 05,3506 0340 EBANK= DNTMBUFF
044029,000191:
044030,000192: 05,3506 COUNT* $$/DPROG
044031,000193: 05,3506 54016 DODOWNTM TS BANKRUPT
044032,000194: 05,3507 00006 EXTEND
044033,000195: 05,3510 22012 QXCH QRUPT # SAVE Q
044034,000196: 05,3511 13763 TCF WOTEST
044035,000197: 05,3512 00006 WO1 EXTEND # SET WORD ORDER BIT TO 1 ONLY IF IT
044036,000198: 05,3513 05013 WOR CHAN13 # ALREADY ISN'T.
044037,000199: 05,3514 00335 TC DNTMGOTO # GOTO APPROPRIATE PHASE OF PROGRAM
044038,000200:
044039,000201: 05,3515 37747 DNPHASE1 CA NEGONE # INITIALIZE ALL CONTROL WORDS
044040,000202: 05,3516 54337 TS SUBLIST # WORDS TO MINUS ONE
044041,000203: 05,3517 54336 TS DNECADR
044042,000204: 05,3520 33640 CA LDNPHAS2 # SET DNTMGOTO =O ALL SUBSEQUENT DOWNRUPTS
044043,000205: 05,3521 54335 TS DNTMGOTO # GO TO DNPHASE2
044044,000206: 05,3522 13536 TCF NEWLIST
044045,000207: 05,3523 10336 DNPHASE2 CCS DNECADR # SENDING OF DATA IN PROGRESS
044046,000208: 05,3524 03653 DODNADR TC FETCH2WD # YES - THEN FETCH THE NEXT 2 SP WORDS
044047,000209: 05,3525 77753 MINTIME2 -1DNADR TIME2 # NEGATIVE OF TIME2 1DNADR
044048,000210: 05,3526 13527 TCF +1 # (ECADR OF 3776 + 74001 = 77777)
044049,000211:
044050,000212: 05,3527 10337 CCS SUBLIST # IS THE SUBLIST IN CONTROL
044051,000213: 05,3530 13666 TCF NEXTINSL # YES
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Page 992 |
044053,000215: 05,3531 74001 DNADRDCR OCT 74001 # DNADR COUNT AND ECADR DECREMENTER
044054,000216:
044055,000217: 05,3532 30334 CHKLIST CA CTLIST
044056,000218: 05,3533 00006 EXTEND
044057,000219: 05,3534 63536 BZMF NEWLIST # IT WILL BE NEGATIVE AT END OF LIST
044058,000220: 05,3535 13543 TCF NEXTINCL
044059,000221: 05,3536 50332 NEWLIST INDEX DNLSTCOD
044060,000222: 05,3537 32441 CA DNTABLE # INITIALIZE CTLIST WITH
044061,000223: 05,3540 54334 TS CTLIST # STARTING ADDRESS OF NEW LIST
044062,000224: 05,3541 40332 CS DNLSTCOD
044063,000225: 05,3542 13756 TCF SENDID +3
044064,000226: 05,3543 50334 NEXTINCL INDEX CTLIST
044065,000227: 05,3544 30000 CA 0
044066,000228: 05,3545 10000 CCS A
044067,000229: 05,3546 24334 INCR CTLIST # SET POINTER TO PICK UP NEXT CTLIST WORD
044068,000230: 05,3547 13553 TCF +4 # ON NEXT ENTRY TO PROG. (A SHOULD NOT =0)
044069,000231: 05,3550 56334 XCH CTLIST # SET CTLIST TO NEGATIVE AND PLACE(CODING)
044070,000232: 05,3551 40000 COM # UNCOMPLEMENTED DNADR INTO A. (FOR LA)
044071,000233: 05,3552 56334 XCH CTLIST # (ST IN )
044072,000234: 05,3553 24000 +4 INCR A # (CTLIST)
044073,000235: 05,3554 54336 TS DNECADR # SAVE DNADR
044074,000236: 05,3555 63525 AD MINTIME2 # TEST FOR TIME2 (NEG. OF ECADR)
044075,000237: 05,3556 10000 CCS A
044076,000238: 05,3557 13563 TCF SETWO +1 # DON'T SET WORD ORDER CODE
044077,000239: 05,3560 47777 MINB1314 OCT 47777 # MINUS BIT 13 AND 14 (CAN'T GET HERE)
044078,000240: 05,3561 13563 TCF SETWO +1 # DON'T SET WORD ORDER CODE
044079,000241: 05,3562 03605 SETWO TC WOZERO # GO SET WORD ORDER CODE TO ZERO.
044080,000242: 05,3563 30336 +1 CA DNECADR # RELOAD A WITH THE DNADR.
044081,000243: 05,3564 63560 +2 AD MINB1314 # IS THIS A REGULAR DNADR?
044082,000244: 05,3565 00006 EXTEND
044083,000245: 05,3566 63653 BZMF FETCH2WD # YES. (A MUST NEVER BE ZERO)
044084,000246: 05,3567 67741 AD MINB12 # NO- IS IT A POINTER (DNPTR) OR A
044085,000247: 05,3570 00006 EXTEND # CHANNEL(DNCHAN)
044086,000248: 05,3571 63611 BZMF DODNPTR # IT'S A POINTER. (A MUST NEVER BE ZERO)
044087,000249:
044088,000250: 05,3572 00006 DODNCHAN TC 6 # (EXECUTED AS EXTEND) IT S A CHANNEL
044089,000251: 05,3573 50336 INDEX DNECADR
044090,000252: 05,3574 44000 INDEX 0 -4000 # (EXECUTED AS READ)
044091,000253: 05,3575 54001 TS L
044092,000254: 05,3576 00006 TC 6 # (EXECUTED AS EXTEND)
044093,000255: 05,3577 50336 INDEX DNECADR
044094,000256: 05,3600 43777 INDEX 0 -4001 # (EXECUTED AS READ)
044095,000257: 05,3601 54336 TS DNECADR # SET DNECADR
044096,000258: 05,3602 37747 CA NEGONE # TO MINUS
044097,000259: 05,3603 56336 XCH DNECADR # WHILE PRESERVING A.
044098,000260: 05,3604 13701 TCF DNTMEXIT # GO SEND CHANNELS
044099,000261:
044100,000262: 05,3605 44745 WOZERO CS BIT7
044101,000263: 05,3606 00006 EXTEND
044102,000264: 05,3607 03013 WAND CHAN13 # SET WORD ORDER CODE TO ZERO
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044104,000266: 05,3610 00002 TC Q # RETURN TO CALLER
044105,000267:
044106,000268: 05,3611 50336 DODNPTR INDEX DNECADR # DNECADR CONTAINS ADRES OF SUBLIST
044107,000269: 05,3612 00000 0 0 # CLEAR AND ADD LIST ENTRY INTO A.
044108,000270: 05,3613 10000 CCS A # IS THIS A SNAPSHOT SUBLIST
044109,000271: 05,3614 30336 CA DNECADR # NO, IT IS A REGULAR SUBLIST.
044110,000272: 05,3615 13665 TCF DOSUBLST # A MUST NOT BE ZERO.
044111,000273:
044112,000274: 05,3616 56336 XCH DNECADR # YES, IT IS A SNAPSHOT SUBLIST.
044113,000275: 05,3617 54337 TS SUBLIST # C(DNECADR) INTO SUBLIST
044114,000276: 05,3620 34755 CAF ZERO # A INTO A
044115,000277: 05,3621 56336 XCH TMINDEX # (NOTE.. TMINDEX = DNECADR)
044116,000278:
044117,000279: # THE FOLLOWING CODING (FROM SNAPLOOP TO SNAPEND) IS FOR THE PURPOSE OF TAKING A SNAPSHOT OF 12 DP REGISTERS.
044118,000280: # THIS IS DONE BY SAVING 11 DP REGISTERS IN DNTMBUFF AND SENDING THE FIRST DP WORD IMMEDIATELY.
044119,000281: # THE SNAPSHOT PROCESSING IS THE MOST TIME CONSUMING AND THEREFORE THE CODING AND LIST STRUCTURE WERE DESIGNED
044120,000282: # TO MINIMIZE TIME. THE TIME OPTIMIZATION RESULTS IN RULES UNIQUE TO THE SNAPSHOT PORTION OF THE DOWNLIST.
044121,000283: # THESE RULES ARE ......
044122,000284: # 1. ONLY 1DNADR'S CAN APPEAR IN THE SNAPSHOT SUBLIST
044123,000285: # 2. THE 1DNADR'S CANNOT REFER TO THE FIRST LOCATION IN ANY BANK.
044124,000286:
044125,000287: 05,3622 54003 SNAPLOOP TS EBANK # SET EBANK
044126,000288: 05,3623 74357 MASK LOW8 # ISOLATE RELATIVE ADDRESS
044127,000289: 05,3624 00006 EXTEND
044128,000290: 05,3625 50000 INDEX A
044129,000291: 05,3626 E3,1401 EBANK= 1401
044130,000292: 05,3626 31402 DCA 1401 # PICK UP 2 SNAPSHOT WORDS.
044131,000293: 05,3627 0340 EBANK= DNTMBUFF
044132,000294: 05,3627 50336 INDEX TMINDEX
044133,000295: 05,3630 52341 DXCH DNTMBUFF # STORE 2 SNAPSHOT WORDS IN BUFFER
044134,000296: 05,3631 24336 INCR TMINDEX # SET BUFFER INDEX FOR NEXT 2 WORDS.
044135,000297: 05,3632 24336 INCR TMINDEX
044136,000298: 05,3633 24337 SNAPAGN INCR SUBLIST # SET POINTER TO NEXT 2 WORDS OF SNAPSHOT
044137,000299: 05,3634 50337 INDEX SUBLIST
044138,000300: 05,3635 00000 0 0 # = CA SSSS (SSSS = NEXT ENTRY IN SUBLIST)
044139,000301: 05,3636 10000 CCS A # TEST FOR LAST TWO WORDS OF SNAPSHOT.
044140,000302: 05,3637 13622 TCF SNAPLOOP # NOT LAST TWO.
044141,000303: 05,3640 03523 LDNPHAS2 GENADR DNPHASE2
044142,000304: 05,3641 54337 TS SUBLIST # YES, LAST. SAVE A.
044143,000305: 05,3642 37747 CA NEGONE # SET DNECADR AND
044144,000306: 05,3643 54336 TS DNECADR # SUBLIST POINTERS
044145,000307: 05,3644 56337 XCH SUBLIST # TO NEGATIVE VALUES.
044146,000308: 05,3645 54003 TS EBANK
044147,000309: 05,3646 74357 MASK LOW8
044148,000310: 05,3647 00006 EXTEND
044149,000311: 05,3650 50000 INDEX A
044150,000312: 05,3651 E3,1401 EBANK= 1401
044151,000313: 05,3651 31402 DCA 1401 # PICK UP FIRST 2 WORDS OF SNAPSHOT.
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Page 994 |
044153,000315: 05,3652 0340 EBANK= DNTMBUFF
044154,000316: 05,3652 13701 SNAPEND TCF DNTMEXIT # NOW GO SEND THEM.
044155,000317:
044156,000318: 05,3653 30336 FETCH2WD CA DNECADR
044157,000319: 05,3654 54003 TS EBANK # SET EBANK
044158,000320: 05,3655 74357 MASK LOW8 # ISOLATE RELATIVE ADDRESS
044159,000321: 05,3656 54001 TS L
044160,000322: 05,3657 33531 CA DNADRDCR # DECREMENT COUNT AND ECADR
044161,000323: 05,3660 26336 ADS DNECADR
044162,000324: 05,3661 00006 EXTEND
044163,000325: 05,3662 50001 INDEX L
044164,000326: 05,3663 E3,1400 EBANK= 1400
044165,000327: 05,3663 31401 DCA 1400 # PICK UP 2 DATA WORDS
044166,000328: 05,3664 0340 EBANK= DNTMBUFF
044167,000329: 05,3664 13701 TCF DNTMEXIT # NOW GO SEND THEM.
044168,000330:
044169,000331: 05,3665 54337 DOSUBLST TS SUBLIST # SET SUBLIST POINTER
044170,000332: 05,3666 50337 NEXTINSL INDEX SUBLIST
044171,000333: 05,3667 00000 0 0 # = CA SSSS (SSSS = NEXT ENTRY IN SUBLIST)
044172,000334: 05,3670 10000 CCS A # IS IT THE END OF THE SUBLIST
044173,000335: 05,3671 24337 INCR SUBLIST # NO -
044174,000336: 05,3672 13676 TCF +4
044175,000337: 05,3673 54337 TS SUBLIST # SAVE A.
044176,000338: 05,3674 37747 CA NEGONE # SET SUBLIST TO MINUS
044177,000339: 05,3675 56337 XCH SUBLIST # RETRIEVE A.
044178,000340: 05,3676 24000 +4 INCR A
044179,000341: 05,3677 54336 TS DNECADR # SAVE DNADR
044180,000342: 05,3700 13564 TCF SETWO +2 # GO USE COMMON CODING (PROBLEMS WOULD
044181,000343: # OCCUR IF THE PROGRAM ENCOUNTERED A
044182,000344: # DNPTR NOW)
044183,000345:
044184,000346: 05,3701 00006 DNTMEXIT EXTEND # DOWN-TELEMETRY EXIT
044185,000347: 05,3702 01034 WRITE DNTM1 # TO SEND A + L TO CHANNELS 34 + 35
044186,000348: 05,3703 30001 CA L # RESPECTIVELY
044187,000349: 05,3704 00006 TMEXITL EXTEND
044188,000350: 05,3705 01035 WRITE DNTM2
044189,000351: 05,3706 15270 TMRESUME TCF RESUME # EXIT TELEMETRY PROGRAM VIA RESUME.
044190,000352:
044191,000353: 05,3707 7741 MINB12 EQUALS -1/8
044192,000354: 05,3707 0336 DNECADR EQUALS TMINDEX
044193,000355: 05,3707 0334 CTLIST EQUALS LDATALST
044194,000356: 05,3707 0337 SUBLIST EQUALS DNQ
044195,000357:
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Page 995 |
044197,000359: # SUBROUTINE NAME - DNDUMP
044198,000360:
044199,000361: # FUNCTIONAL DESCRIPTION - TO SEND (DUMP) ALL ERASABLE STORAGE 'N' TIMES. (N=1 TO 4). BANKS ARE SENT ONE AT A TIME
044200,000362: # EACH BANK IS PRECEEDED BY AN ID WORD, SYNCH BITS, ECADR AND TIME1 FOLLOWED BY THE 256D WORDS OF EACH
044201,000363: # EBANK. EBANKS ARE DUMPED IN ORDER (I.E. EBANK 0 FIRST, THEN EBANK1 ETC.)
044202,000364:
044203,000365: # CALLING SEQUENCE - THE GROUND OR ASTRONAUT BY KEYING V74E CAN INITIALIZE THE DUMP.
044204,000366: # AFTER KEYING IN V74E THE CURRENT DOWNLIST WILL BE IMMEDIATELY TERMINATED AND THE DOWNLINK ERASABLE DUMP
044205,000367: # WILL BEGIN.
044206,000368:
044207,000369: # ONCE INITIATED THE DOWNLINK ERASABLE DUMP CAN BE TERMINATED (AND INTERRUPTED DOWNLIST REINSTATED) ONLY
044208,000370: # BY THE FOLLOWING:
044209,000371:
044210,000372: # 1. A FRESH START
044211,000373: # 2. COMPLETION OF ALL DOWNLINK DUMPS REQUESTED (ACCORDING TO BITS SET IN DUMPCNT). NOTE THAT DUMPCNT
044212,000374: # CAN BE ALTERED BY A V21N01.
044213,000375: # 3. AND INVOLUNTARILY BY A RESTART.
044214,000376:
044215,000377: # NORMAL EXIT MODE - TCF DNPHASE1
044216,000378:
044217,000379: # ALARM OR ABORT MODE - NONE
044218,000380:
044219,000381: # *SUBROUTINES CALLED - NONE.
044220,000382:
044221,000383: # ERASABLE INITIALIZATION REQUIRED -
044222,000384: # DUMPCNT OCT 20000 IF 4 COMPLETE ERASABLE DUMPS ARE DESIRED
044223,000385: # DUMPCNT OCT 10000 IF 2 COMPLETE ERASABLE DUMPS ARE DESIRED
044224,000386: # DUMPCNT OCT 04000 IF 1 COMPLETE ERASABLE DUMP IS DESIRED
044225,000387:
044226,000388: # DEBRIS - DUMPLOC, DUMPSW, DNTMGOTO, EBANK AND CENTRAL REGISTERS
044227,000389:
044228,000390: # TIMING - TIME (IN SECS) = ((NO.DUMPS)*(NO.EBANKS)*(WDSPEREBANK + NO.IDWDS)) / NO.WDSPERSEC
044229,000391: # TIME (IN SECS) = ( 4 )*( 8 )*( 256 + 4 ) / 100
044230,000392: # THUS TIME (IN SECS TO SEND DUMP OF ERASABLE 4 TIMES VIA DOWNLINK) = 83.2 SECONDS
044231,000393:
044232,000394: # STRUCTURE OF ONE EBANK AS IT IS SENT BY DOWNLINK PROGRAM -
044233,000395: # (REMINDER - THIS ONLY DESCRIBES ONE OF THE 8 EBANKS X 4 (DUMPS) = 32 EBANKS WHICH WILL BE SENT BY DNDUMP)
044234,000396: # DOWNLIST W
044235,000397: # WORD TAKEN FROM CONTENTS OF EXAMPLE O COMMENTS
044236,000398: # 1 ERASID 0177X 0 DOWNLIST I.D. FOR DOWNLINK ERASABLE DUMP (X=7 CSM, 6 LM)
044237,000399: # 2 LOWIDCOD 77340 1 DOWNLINK SYNCH BITS. (SAME ONE USED IN ALL OTHER DOWNLISTS)
044238,000400: # 3 DUMPLOC 13400 1 (SEE NOTES ON DUMPLOC) 1 = 3RD ERAS DUMP, 3400=ECADR OF 5TH WD
044239,000401: # 4 TIME1 14120 1 TIME IN CENTISECONDS
044240,000402: # 5 FIRST WORD OF EBANK X 03400 1 IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1400 (ECADR 3400)
044241,000403: # 6 2ND WORD OF EBANK X 00142 1 IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1401 (ECADR 3401)
044242,000404: # 7 3RD WORD OF EBANK X 00142 1 IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1402 (ECADR 3402)
044243,000405: # . 1
044244,000406: # . 1
044245,000407: # . 1
044246,000408: # 260D 256TH WORD OF EBANK X 03777 1 IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1777 (ECADR 3777)
044247,000409:
044248,000410: # NOTE - DUMPLOC CONTAINS THE COUNTER AND ECADR FOR EACH WORD BEING SENT.
044249,000411: # THE BIT STRUCTURE OF DUMPLOC IS FOLLOWS---
044250,000412: # X = NOT USED
044251,000413: # X ABC EEE RRRRRRRR ABC = ERASABLE DUMP COUNTER (I.E. ABC = 0,1,2 OR 3 WHICH MEANS THAT
044252,000414: # COMPLETE ERASABLE DUMP NUMBER 1,2,3 OR 4 RESPECTIVELY IS IN PROGRESS)
044253,000415: # EEE = EBANK BITS
044254,000416: # RRRRRRRR = RELATIVE ADDRESS WITHIN AN EBANK.
044255,000417:
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Page 996 |
044257,000419: 05,3707 34755 DNDUMPI CA ZERO # INITIALIZE DOWNLINK
044258,000420: 05,3710 54336 TS DUMPLOC # ERASABLE DUMP
044259,000421: 05,3711 03753 +2 TC SENDID # GO SEND ID AND SYNCH BITS
044260,000422: 05,3712 33721 CA LDNDUMP1 # SET DNTMGOTO
044261,000423: 05,3713 54335 TS DNTMGOTO # TO LOCATION FOR NEXT PASS
044262,000424: 05,3714 30025 CA TIME1 # PLACE TIME1
044263,000425: 05,3715 56001 XCH L # INTO L
044264,000426: 05,3716 30336 CA DUMPLOC # AND ECADR OF THIS EBANK INTO A
044265,000427: 05,3717 13701 TCF DNTMEXIT # SEND DUMPLOC AND TIME1
044266,000428:
044267,000429: 05,3720 03722 LDNDUMP ADRES DNDUMP
044268,000430: 05,3721 03735 LDNDUMP1 ADRES DNDUMP1
044269,000431:
044270,000432: 05,3722 34752 DNDUMP CA TWO # INCREMENT ECADR IN DUMPLOC
044271,000433: 05,3723 26336 ADS DUMPLOC # TO NEXT DP WORD TO BE
044272,000434: 05,3724 74357 MASK LOW8 # DUMPED AND SAVE IT.
044273,000435: 05,3725 10000 CCS A # IS THIS THE BEGINNING OF A NEW EBANK
044274,000436: 05,3726 13737 TCF DNDUMP2 # NO - THEN CONTINUE DUMPING
044275,000437: 05,3727 30336 CA DUMPLOC # YES - IS THIS THE END OF THE
044276,000438: 05,3730 70333 MASK DUMPCNT # N TH (N = 1 TO 4) COMPLETE ERASABLE
044277,000439: 05,3731 77722 MASK PRIO34 # DUMP (BIT14 FOR 4, BIT13 FOR 2 OR BIT12
044278,000440: 05,3732 10000 CCS A # FOR 1 COMPLETE ERASABLE DUMP(S)).
044279,000441: 05,3733 13515 TCF DNPHASE1 # YES - START SENDING INTERRUPTED DOWNLIST
044280,000442: # AGAIN
044281,000443: 05,3734 13711 TCF DNDUMPI +2 # NO - GO BACK AND INITIALIZE NEXT BANK
044282,000444:
044283,000445: 05,3735 33720 DNDUMP1 CA LDNDUMP # SET DNTMGOTO
044284,000446: 05,3736 54335 TS DNTMGOTO # FOR WORDS 3 TO 256D OF CURRENT EBANK
044285,000447:
044286,000448: 05,3737 30336 DNDUMP2 CA DUMPLOC
044287,000449: 05,3740 54003 TS EBANK # SET EBANK
044288,000450: 05,3741 74357 MASK LOW8 # ISOLATE RELATIVE ADDRESS.
044289,000451: 05,3742 54002 TS Q # (NOTE: MASK INSTRUCTION IS USED TO PICK
044290,000452: 05,3743 34754 CA NEG0 # UP ERASABLE REGISTERS SO THAT EDITING
044291,000453: 05,3744 54001 TS L # REGISTERS 20-23 WILL NOT BE ALTERED.)
044292,000454: 05,3745 50002 INDEX Q
044293,000455: 05,3746 E3,1400 EBANK= 1400 # PICK UP LOW ORDER REGISTER OF PAIR
044294,000456: 05,3746 71401 MASK 1401 # OF ERASABLE REGISTERS.
044295,000457: 05,3747 56001 XCH L
044296,000458: 05,3750 50002 INDEX Q # PICK UP HIGH ORDER REGISTER OF PAIR
044297,000459: 05,3751 71400 MASK 1400 # OF ERASABLE REGISTERS.
044298,000460: 05,3752 0340 EBANK= DNTMBUFF
044299,000461: 05,3752 13701 TCF DNTMEXIT # GO SEND THEM
044300,000462:
044301,000463: 05,3753 00006 SENDID EXTEND # ** ENTRANCE USED BY ERASABLE DUMP PROG.**
044302,000464: 05,3754 22335 QXCH DNTMGOTO # SET DNTMGOTO SO NEXT TIME PROG WILL GO
044303,000465: 05,3755 35011 CAF ERASID # TO LOCATION FOLLOWING :TC SENDID:
044304,000466:
044305,000467: 05,3756 54001 TS L # ** ENTRANCE USED BY REGULAR DOWNLINK PG **
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Page 997 |
044307,000469: 05,3757 03605 TC WOZERO # GO SET WORD ORDER CODE TO ZERO
044308,000470: 05,3760 32065 CAF LOWIDCOD # PLACE SPECIAL ID CODE INTO L
044309,000471: 05,3761 56001 XCH L # AND ID BACK INTO A
044310,000472: 05,3762 13701 TCF DNTMEXIT # SEND DOWNLIST ID CODE(S).
044311,000473:
044312,000474: 05,3763 34745 WOTEST CA BIT7 # AT THE BEGINNING OF THE LIST THE WORD
044313,000475: 05,3764 00006 EXTEND # ORDER BIT WILL BE SET BACK TO ZERO
044314,000476: 05,3765 02013 RAND CHAN13
044315,000477: 05,3766 10000 CCS A
044316,000478: 05,3767 00335 TC DNTMGOTO
044317,000479: 05,3770 34745 CA BIT7
044318,000480: 05,3771 13512 TCF WO1
044319,000481:
End of include-file DOWN-TELEMETRY_PROGRAM.agc. Parent file is MAIN.agc