Source Code
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These source-code files were derived originally from the scan from MIT's Dibner Institute's
now-discontinued website titled "History of Recent Science and Technology". It is believed
that the original listing was preserved by AGC developer Don Eyles, copied/reduced by
AGC developer Hugh Blair-Smith, passed by AGC developer James Kernan to collector David Craig,
scanned by Gary Neff, and then passed to the Dibner Institute
where unfortunately the high-quality scans were reduced in legibility as part of the
online-presentation process, and the original scans discarded.
The source code was transcribed from
those images by Ron Burkey. The images from the Dibner Institute website, and unfortunately not
the discarded original high-quality scans, though with a few high-quality replacement scans
provided directly by Gary Neff, are now available
at the Virtual AGC project website.
Report any conversion errors to info@sandroid.org.
Notations on the program listing read, in part:GAP: ASSEMBLE REVISION 131 OF AGC PROGRAM LUMINARY BY NASA 2021112-091 17:53 DEC. 19, 1969Note that the date is the date of the printout, not the date of the program revision. |
041598,000002: ## Copyright: Public domain.
041599,000003: ## Filename: DOWN_TELEMETRY_PROGRAM.agc
041600,000004: ## Purpose: A section of Luminary 1C, revision 131.
041601,000005: ## It is part of the source code for the Lunar Module's (LM)
041602,000006: ## Apollo Guidance Computer (AGC) for Apollo 13 and Apollo 14.
041603,000007: ## This file is intended to be a faithful transcription, except
041604,000008: ## that the code format has been changed to conform to the
041605,000009: ## requirements of the yaYUL assembler rather than the
041606,000010: ## original YUL assembler.
041607,000011: ## Reference: pp. 987-998 of 1729.pdf.
041608,000012: ## Contact: Ron Burkey <info@sandroid.org>.
041609,000013: ## Website: www.ibiblio.org/apollo/index.html
041610,000014: ## Mod history: 05/29/03 RSB. Began transcribing.
041611,000015: ## 05/14/05 RSB Corrected website reference above.
041612,000016: ## 2010-08-24 JL Fixed page 995 number.
041613,000017: ## 2010-10-25 JL Indentation fixes.
041614,000018:
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Page 987 |
041616,000020: # PROGRAM NAME -- DOWN TELEMETRY PROGRAM
041617,000021: # MOD NO. -- 0 TO COMPLETELY REWRITE THE DOWN TELEMETRY PROGRAM AND DOWNLINK ERASABLE DUMP PROGRAM FOR THE
041618,000022: # PURPOSE OF SAVING APPROXIMATELY 150 WORDS OF CORE STORAGE.
041619,000023: # THIS CHANGE REQUIRES AN ENTIRELY NEW METHOD OF SPECIFYING DOWNLINK LISTS. REFER TO DOWNLINK
041620,000024: # LISTS LOG SECTION FOR MORE DETAILS. HOWEVER THIS CHANGES WILL NOT AFFECT THE GROUND PROCESSING
041621,000025: # OF DOWN TELEMETRY DATA.
041622,000026: # MOD BY -- KILROY, SMITH, DEWITT
041623,000027: # DATE -- 02 OCT 67
041624,000028: # AUTHORS -- KILROY, SMITH, DWWITT, DEWOLF, FAGIN
041625,000029: # LOG SECTION -- DOWN-TELEMETRY PROGRAM
041626,000030:
041627,000031: # FUNCTIONAL DESCRIPTION -- THIS ROUTINE IS INITIATED BY TELEMETRY END
041628,000032: # PULSE FROM THE DOWNLINK TELEMETRY CONVERTER. THIS PULSE OCCURS
041629,000033: # AT 50 TIMES PER SEC (EVERY 20 MS) THEREFORE DODOWNTM IS
041630,000034: # EXECUTED AT THESE RATES. THIS ROUTINE SELECTS THE APPROPRIATE
041631,000035: # AGC DATA TO BE TRANSMITTED DOWNLINK AND LOADS IT INTO OUTPUT
041632,000036: # CHANNELS 34 AND 35. THE INFORMATION IS THEN GATED OUT FROM THE
041633,000037: # LGC IN SERIAL FASHION.
041634,000038:
041635,000039: # THIS PROGRAM IS CODED FOR A 2 SECOND DOWNLIST. SINCE DOWNRUPTS
041636,000040: # OCCUR EVERY 20 MS AND 2 AGC COMPUTER WORDS CAN BE PLACED IN
041637,000041: # CHANNELS 34 AND 35 DURING EACH DOWNRUPT THE PROGRAM IS CAPABLE
041638,000042: # OF SENDING 200 AGC WORDS EVERY 2 SECONDS.
041639,000043:
041640,000044: # CALLING SEQUENCE -- NONE
041641,000045: # PROGRAM IS ENTERED VIA TCF DODOWNTM WHICH IS EXECUTED AS A
041642,000046: # RESULT OF A DOWNRUPT. CONTROL IS RETURNED VIA TCF RESUME WHICH
041643,000047: # IN EFFECT IS A RESUME.
041644,000048:
041645,000049: # SUBROUTINES CALLED -- NONE
041646,000050:
041647,000051: # NORMAL EXIT MODE -- TCF RESUME
041648,000052:
041649,000053: # ALARM OR ABORT EXIT MODE -- NONE
041650,000054:
041651,000055: # RESTART PROTECTION:
041652,000056: # ON A FRESH START AND RESTART THE `STARTSUB' SUBROUTINE WILL INITIALIZE THE DOWNLIST POINTER (ACTUALLY
041653,000057: # DNTMGOTO) TO THE BEGINNING OF THE CURRENT DOWNLIST (I.E., CURRENT CONTENTS OF DNLSTADR). THIS HAS THE
041654,000058: # EFFECT OF IGNORING THE REMAINDER OF THE DOWNLIST WHICH THE DOWN-TELEMETRY PROGRAM WAS WORKING ON WHEN
041655,000059: # THE RESTART (OR FRESH START) OCCURRED AND RESUME DOWN TELEMETRY FROM THE BEGINNING OF THE CURRENT
041656,000060: # DOWNLIST.
041657,000061:
041658,000062: # ALSO OF INTEREST IS THE FACT THAT ON A RESTART THE AGC WILL ZERO DOWNLINK CHANNELS 13, 34 AND 35.
041659,000063:
041660,000064: # DOWNLINK LIST SELECTION:
041661,000065: # THE APPROPRIATE DOWNLINK LISTS ARE SELECTED BY THE FOLLOWING:
041662,000066: # 1. FRESH START
041663,000067: # 2. V37EXXE WHERE XX = THE MAJOR MODE BEING SELECTED.
041664,000068: # 3. UPDATE PROGRAM (P27)
041665,000069: # 4. NON-V37 SELECTABLE TYPE PROGRAMS (E.G., AGS INITIALIZATION (SUNDANCE, LUMINARY) AND P61-P62
041666,000070: # TRANSITIONS (COLOSSUS) ETC.).
041667,000071:
041668,000072: # DOWNLINK LIST RULES AND LIMITATIONS:
041669,000073: # READ SECTION(S) WHICH FOLLOW `DEBRIS' WRITEUP.
041670,000074:
041671,000075: # OUTPUT -- EVERY 2 SECONDS 100 DOUBLE PRECISION WORDS (I.E., 200 LGC
041672,000076: # COMPUTER WORDS) ARE TRANSMITTED VIA DOWNLINK.
041673,000077:
041674,000078: # ERASABLE INITIALIZATION REQUIRED -- NONE
041675,000079: # `DNTMGOTO' AND `DNLSTADR' ARE INITIALIZED BY THE FRESH START PROGRAM.
041676,000080:
041677,000081: # DEBRIS (ERASABLE LOCATIONS DESTROYED BY THIS PROGRAM) --
041678,000082: # LDATALST, DNTMBUFF TO DNTMBUFF +21D, TMINDEX, DNQ.
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Page 988 |
041680,000084: # (No source on this page of the original assembly listing.)
041681,000085:
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Page 989 |
041683,000087: # DODOWNTM IS ENTERED EVERY 20 MS BY AN INTERRUPT TRIGGERED BY THE
041684,000088: # RECEIPT OF AN ENDPULSE FROM THE SPACECRAFT TELEMETRY PROGRAMMER.
041685,000089:
041686,000090: # NOTES REGARDING DOWNLINK LISTS ASSOCIATED WITH THIS PROGRAM:
041687,000091: # 1. DOWNLISTS. DOWNLISTS MUST BE COMPILED IN THE SAME BANK AS THE
041688,000092: # DOWN-TELEMETRY PROGRAM. THIS IS DONE FOR EASE OF CODING, FASTER
041689,000093: # EXECUTION.
041690,000094: # 2. EACH DOWNLINK LIST CONSISTES OF A CONTROL LIST AND A NUMBER OF
041691,000095: # SUBLISTS.
041692,000096: # 3. A SUBLIST REFERS TO A SNAPSHOT OR DATA COMMON TO THE SAME OR OTHER
041693,000097: # DOWNLINK LISTS. ANY SUBLIST CONTAINING COMMON DATA NEEDS TO BE
041694,000098: # CODED ONLY ONCE FOR THE APPLICABLE DOWNLINK LISTS.
041695,000099: # 4. SNAPSHOT SUBLISTS REFER SPECIFICALLY TO HOMOGENEOUS DATA WHICH MUST BE
041696,000100: # SAVED IN A BUFFER DURING ONE DOWNRUPT.
041697,000101: # 5. THE 1DNADR FOR THE 1ST WORD OF SNAPSHOT DATA IS FOUND AT THE END
041698,000102: # OF EACH SNAPSHOT SUBLIST, SINCE THE PROGRAM CODING SENDS THIS DP WORD
041699,000103: # IMMEDIATELY AFTER STORING THE OTHERS IN THE SNAPSHOT BUFFER.
041700,000104: # 6. ALL LISTS ARE COMBINATIONS OF CODED ERASABLE ADDRESS CONSTANTS
041701,000105: # CREATED FOR THE DOWNLIST PROGRAM.
041702,000106: # A. 1DNADR 1-WORD DOWNLIST ADDRESS.
041703,000107: # SAME AS ECADR, BUT USED WHEN THE WORD ADDRESSED IS THE LEFT
041704,000108: # HALF OF A DOUBLE-PRECISION WORD FOR DOWN TELEMETRY.
041705,000109: # B. 2DNADR - 6DNADR N-WORD DOWNLIST ADDRESS, N = 2 - 6.
041706,000110: # SAME AS 1DNADR, BUT WTIH THE 4 UNUSED BITS OF THE ECADR FORMAT
041707,000111: # FILLED IN WITH 0001-0101. USED TO POINT TO A LIST OF N DOUBLE-
041708,000112: # PRECISION WORDS, STORED CONSECUTIVELY, FOR DOWN TELEMETRY.
041709,000113: # C. DNCHAN DOWNLIST CHANNEL ADDRESS.
041710,000114: # SAME AS 1DNADR, BUT WITH PREFIX BITS 0111. USED TO POINT TO
041711,000115: # A PAIR OF CHANNELS FOR DOWN TELEMETRY.
041712,000116: # D. DNPTR DOWN-TELEMETRY SUBLIST POINTER.
041713,000117: # SAME AS CAF BUT TAGGES AS A CONSTANT. USED IN CONTROL LIST TO POINT TO A SUBLIST.
041714,000118: # CAUTION --- A DNPTR CANNOT BE USED IN A SUBLIST.
041715,000119: # 7. THE WORD ORDER CODE IS SET TO ZERO AT THE BEGINNING OF EACH DOWNLIST (I.E., CONTROL LIST) AND WHEN
041716,000120: # A `1DNADR TIME2' IS DETECTED IN THE CONTROL LIST (ONLY).
041717,000121: # 8. IN THE SNAPSHOT SUBLIST ONLY, THE DNADR'S CANNOT POINT TO THE FIRST WORD OF ANY EBANK.
041718,000122:
041719,000123: # DOWNLIST LIST RESTRICTIONS:
041720,000124: # (THE FOLLOWING POINTS MAY BE LISTED ELSEWHERE BUT ARE LISTED HERE SO IT IS CLEAR THAT THESE THINGS CANNOT BE
041721,000125: # DONE)
041722,000126: # 1. SNAPSHOT DOWNLIST:
041723,000127: # (A) CANNOT CONTAIN THE FOLLOWING ECADRS (I.E., 1DNADR'S): Q, 400, 1000, 1400, 2000, 2400, 3000, 3400.
041724,000128: # (B) CAN CONTAIN ONLY 1DNADR'S
041725,000129: # 2. ALL DOWNLINKED DATA (EXCEPT CHANNELS) IS PICKED UP BY A DCA SO DOWNLINK LISTS CANNOT CONTAIN THE
041726,000130: # EQUIVALENT OF THE FOLLOWING ECADRS (I.E., IDNADRS): 377, 777, 1377, 1777, 2377, 2777, 3377, 3777.
041727,000131: # (NOTE: TE TERM `EQUIVALENT' MEANT THAT THE IDNADR TO 6DNADR WILL BE PROCESSED LIKE 1 TO 6 ECADRS)
041728,000132: # 3. CONTROL LISTS AND SUBLISTS CANNOT HAVE ENTRIES = OCTAL 00000 OR OCTAL 77777
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Page 990 |
041730,000134: # 4. THE `1DNADR TIME2' WHICH WILL CAUSE THE DOWNLINT PROGRAM TO SET THE WORDER CODE TO 3 MUST APPEAR IN THE
041731,000135: # CONTROL SECTION OF THE DOWNLIST.
041732,000136: # 5. `DNCHAN 0' CANNOT BE USED.
041733,000137: # 6. `DNPTR 0' CANNOT BE USED.
041734,000138: # 7. DNPTR CANNOT APPEAR IN A SUBLIST.
041735,000139:
041736,000140: # EBANK SETTINGS
041737,000141: # IN THE PROCESS OF SETTING THE EBANK (WHEN PICKING UP DOWNLINK DATA) THE DOWN TELEMETRY PROGRAM PUTS
041738,000142: # `GARBAGE' INTO BITS15-12 OF EBANK. HUGH BLAIR-SMITH WARNS US THAT BITS15-12 OF EBANK MAY BECOME
041739,000143: # SIGNIFICANT SOMEDAY IN THE FUTURE. IF/WHEN THAT HAPPENS, THE PROGRAM SHOULD INSURE (BY MASKING ETC.)
041740,000144: # THAT BITS 15-12 OF EBANK ARE ZERO.
041741,000145:
041742,000146: # INITIALIZATION REQUIRED -- TO INTERRUPT CURRENT LIST AND START A NEW ONE.
041743,000147: # 1. ADRES OF DOWNLINK LIST INTO DNLSTADR
041744,000148: # 2. NEGONE INTO SUBLIST
041745,000149: # 3. NEGONE INTO DNECADR
041746,000150:
041747,000151: 22,3711 BANK 22
041748,000152: 05,2000 SETLOC DOWNTELM
041749,000153: 05,2000 BANK
041750,000154:
041751,000155: 05,3505 0340 EBANK= DNTMBUFF
041752,000156: 05,3505 COUNT* $$/DPROG
041753,000157: 05,3505 54016 DODOWNTM TS BANKRUPT
041754,000158: 05,3506 00006 EXTEND
041755,000159: 05,3507 22012 QXCH QRUPT # SAVE Q
041756,000160: 05,3510 34745 CA BIT7 # AT THE BEGINNING OF THE LIST THE WORD
041757,000161: 05,3511 00006 EXTEND # ORDER BIT WILL BE SET BACK TO ZERO.
041758,000162: 05,3512 02013 RAND CHAN13
041759,000163: 05,3513 10000 CCS A
041760,000164: 05,3514 00335 TC DNTMGOTO
041761,000165: 05,3515 06022 TC C13STALL
041762,000166: 05,3516 34745 CA BIT7
041763,000167: 05,3517 00006 EXTEND # SET WORD ORDER BIT TO 1 ONLY IF IT
041764,000168: 05,3520 05013 WOR CHAN13 # ALREADY ISN'T
041765,000169: 05,3521 00335 TC DNTMGOTO # GOTO APPROPRIATE PHASE OF PROGRAM
041766,000170:
041767,000171: 05,2000 SETLOC DOWNTELM
041768,000172: 05,2000 BANK
041769,000173:
041770,000174: 05,3522 37752 DNPHASE1 CA NEGONE # INITIALIZE ALL CONTROL WORDS
041771,000175: 05,3523 54337 TS SUBLIST # WORDS TO MINUS ONE
041772,000176: 05,3524 54336 TS DNECADR
041773,000177: 05,3525 33652 CA LDNPHAS2 # SET DNTMGOTO = 0 ALL SUSEQUENT DOWRUPTS
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Page 991 |
041775,000179: 05,3526 54335 TS DNTMGOTO # GO TO DNPHASE2
041776,000180: 05,3527 13543 TCF NEWLIST
041777,000181: 05,3530 10336 DNPHASE2 CCS DNECADR # SENDING OF DATA IN PROGRESS
041778,000182: 05,3531 03665 DODNADR TC FETCH2WD # YES -- THEN FETCH THE NEXT 2 SP WORDS
041779,000183: 05,3532 77753 MINTIME2 -1DNADR TIME2 # NEGATIVE OF TIME2 1DNADR
041780,000184: 05,3533 13534 TCF +1 # (ECADR OF 3776 + 74001 = 77777)
041781,000185:
041782,000186: 05,3534 10337 CCS SUBLIST # IS THE SUBLIST IN CONTROL
041783,000187: 05,3535 13700 TCF NEXTINSL # YES
041784,000188: 05,3536 74001 DNADRDCR OCT 74001 # DNADR COUNT AND ECADR DECREMENTER
041785,000189:
041786,000190: 05,3537 30334 CHKLIST CA CTLIST
041787,000191: 05,3540 00006 EXTEND
041788,000192: 05,3541 63543 BZMF NEWLIST # IT WILL BE NEGATIVE AT END OF LIST
041789,000193: 05,3542 13550 TCF NEXTINCL
041790,000194: 05,3543 50333 NEWLIST INDEX DNLSTCOD
041791,000195: 05,3544 32441 CA DNTABLE # INITIALIZE CTLIST WITH
041792,000196: 05,3545 54334 TS CTLIST # STARTING ADDRESS OF NEW LIST
041793,000197: 05,3546 40333 CS DNLSTCOD
041794,000198: 05,3547 13767 TCF SENDID +3
041795,000199: 05,3550 50334 NEXTINCL INDEX CTLIST
041796,000200: 05,3551 30000 CA 0
041797,000201: 05,3552 10000 CCS A
041798,000202: 05,3553 24334 INCR CTLIST # SET POINTER TO PICK UP NEXT CTLIST WORD
041799,000203: 05,3554 13560 TCF +4 # ON NEXT ENTRY TO PROG. (A SHOULD NOT =0)
041800,000204: 05,3555 56334 XCH CTLIST # SET CTLIST TO NEGATIVE AND PLACE(CODING)
041801,000205: 05,3556 40000 COM # UNCOMPLEMENTED DNADR INTO A. (FOR LA)
041802,000206: 05,3557 56334 XCH CTLIST # (ST IN )
041803,000207: 05,3560 24000 +4 INCR A # (CTLIST)
041804,000208: 05,3561 54336 TS DNECADR # SAVE DNADR
041805,000209: 05,3562 63532 AD MINTIME2 # TEST FOR TIME2 (NEG. OF ECADR)
041806,000210: 05,3563 10000 CCS A
041807,000211: 05,3564 13570 TCF SETWO +1 # DON'T SET WORD ORDER CODE
041808,000212: 05,3565 47777 MINB1314 OCT 47777 # MINUS BIT 13 AND 14 (CAN'T GET HERE)
041809,000213: 05,3566 13570 TCF SETWO +1 # DON'T SET WORD ORDER CODE
041810,000214: 05,3567 03612 SETWO TC WOZERO # GO SET WORD ORDER CODE TO ZERO.
041811,000215: 05,3570 30336 +1 CA DNECADR # RELOAD A WITH THE DNADR.
041812,000216: 05,3571 63565 +2 AD MINB1314 # IS THIS A REGULAR DNADR?
041813,000217: 05,3572 00006 EXTEND
041814,000218: 05,3573 63665 BZMF FETCH2WD # YES. (A MUST NEVER BE ZERO)
041815,000219: 05,3574 67744 AD MINB12 # NO. IS IT A POINTER (DNPTR) OR A
041816,000220: 05,3575 00006 EXTEND # CHANNEL(DNCHAN)
041817,000221: 05,3576 63623 BZMF DODNPTR # IT'S A POINTER. (A MUST NEVER BE ZERO)
041818,000222:
041819,000223: 05,3577 00006 DODNCHAN TC 6 # (EXECUTED AS EXTEND) IT'S A CHANNEL
041820,000224: 05,3600 50336 INDEX DNECADR
041821,000225: 05,3601 44000 INDEX 0 -4000 # (EXECUTED AS READ)
041822,000226: 05,3602 54001 TS L
041823,000227: 05,3603 00006 TC 6 # (EXECUTED AS EXTEND)
041824,000228: 05,3604 50336 INDEX DNECADR
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Page 992 |
041826,000230: 05,3605 43777 INDEX 0 -4001 # (EXECUTED AS READ)
041827,000231: 05,3606 54336 TS DNECADR # SET DNECADR
041828,000232: 05,3607 37752 CA NEGONE # TO MINUS
041829,000233: 05,3610 56336 XCH DNECADR # WHILE PRESERVING A.
041830,000234: 05,3611 13713 TCF DNTMEXIT # GO SEND CHANNELS
041831,000235:
041832,000236: 05,3612 00006 WOZERO EXTEND
041833,000237: 05,3613 23265 QXCH C13QSAV
041834,000238: 05,3614 22070 LXCH RUPTREG1
041835,000239: 05,3615 06022 TC C13STALL
041836,000240:
041837,000241: 05,3616 22070 LXCH RUPTREG1
041838,000242: 05,3617 44745 CS BIT7
041839,000243: 05,3620 00006 EXTEND
041840,000244: 05,3621 03013 WAND CHAN13 # SET WORD ORDER CODE TO ZERO
041841,000245: 05,3622 01265 TC C13QSAV
041842,000246:
041843,000247: 05,3623 50336 DODNPTR INDEX DNECADR # DNECADR CONTAINS ADRES OF SUBLIST
041844,000248: 05,3624 00000 0 0 # CLEAR AND ADD LIST ENTRY INTO A.
041845,000249: 05,3625 10000 CCS A # IS THIS A SNAPSHOT SUBLIST
041846,000250: 05,3626 30336 CA DNECADR # NO, IT IS A REGULAR SUBLIST.
041847,000251: 05,3627 13677 TCF DOSUBLST # A MUST NOT BE ZERO.
041848,000252:
041849,000253: 05,3630 56336 XCH DNECADR # YES. IT IS A SNAPSHOT SUBLIST.
041850,000254: 05,3631 54337 TS SUBLIST # C(DNECADR) INTO SUBLIST
041851,000255: 05,3632 34755 CAF ZERO # A INTO A
041852,000256: 05,3633 56336 XCH TMINDEX # (NOTE: TMINDEX = DNECADR)
041853,000257:
041854,000258: # THE FOLLOWING CODING (FROM SNAPLOOP TO SNAPEND) IS FOR THE PURPOSE OF TAKING A SNAPSHOT OF 12 DP REGISTERS.
041855,000259: # THIS IS DONE BY SAVING 11 DP REGISTERS IN DNTMBUFF AND SENDING THE FIRST DP WORD IMMEDIATELY.
041856,000260: # THE SNAPSHOT PROCESSING IS THE MOST TIME CONSUMING AND THEREFORE THE CODING AND LIST STRUCTURE WERE DESIGNED
041857,000261: # TO MINIMIZE TIME. THE TIME OPTIMIZATION RESULTS IN RULES UNIQUE TO THE SNAPSHOT PORTION OF THE DOWNLIST.
041858,000262: # THESE RULES ARE ......
041859,000263: # 1. ONLY 1DNADR'S CAN APPEAR IN THE SNAPSHOT SUBLIST
041860,000264: # 2. THE 1DNADR'S CANNOT REFER TO THE FIRST LOCATION IN ANY BANK.
041861,000265:
041862,000266: 05,3634 54003 SNAPLOOP TS EBANK # SET EBANK
041863,000267: 05,3635 74357 MASK LOW8 # ISOLATE RELATIVE ADDRESS
041864,000268: 05,3636 00006 EXTEND
041865,000269: 05,3637 50000 INDEX A
041866,000270: 05,3640 E3,1401 EBANK= 1401
041867,000271: 05,3640 31402 DCA 1401 # PICK UP 2 SNAPSHOT WORDS.
041868,000272: 05,3641 0340 EBANK= DNTMBUFF
041869,000273: 05,3641 50336 INDEX TMINDEX
041870,000274: 05,3642 52341 DXCH DNTMBUFF # STORE 2 SNAPSHOT WORDS IN BUFFER
041871,000275: 05,3643 24336 INCR TMINDEX # SET BUFFER INDEX FOR NEXT 2 WORDS.
041872,000276: 05,3644 24336 INCR TMINDEX
041873,000277: 05,3645 24337 SNAPAGN INCR SUBLIST # SET POINTER TO NEXT 2 WORDS OF SNAPSHOT
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Page 993 |
041875,000279: 05,3646 50337 INDEX SUBLIST
041876,000280: 05,3647 00000 0 0 # = CA SSSS (SSSS = NEXT ENTRY IN SUBLIST)
041877,000281: 05,3650 10000 CCS A # TEST FOR LAST TWO WORDS OF SNAPSHOT.
041878,000282: 05,3651 13634 TCF SNAPLOOP # NOT LAST TWO.
041879,000283: 05,3652 03530 LDNPHAS2 GENADR DNPHASE2
041880,000284: 05,3653 54337 TS SUBLIST # YES, LAST. SAVE A.
041881,000285: 05,3654 37752 CA NEGONE # SET DNECADR AND
041882,000286: 05,3655 54336 TS DNECADR # SUBLIST POINTERS
041883,000287: 05,3656 56337 XCH SUBLIST # TO NEGATIVE VALUES
041884,000288: 05,3657 54003 TS EBANK
041885,000289: 05,3660 74357 MASK LOW8
041886,000290: 05,3661 00006 EXTEND
041887,000291: 05,3662 50000 INDEX A
041888,000292: 05,3663 E3,1401 EBANK= 1401
041889,000293: 05,3663 31402 DCA 1401 # PICK UP FIRST 2 WORDS OF SNAPSHOT.
041890,000294: 05,3664 0340 EBANK= DNTMBUFF
041891,000295: 05,3664 13713 SNAPEND TCF DNTMEXIT # NOW TO SEND THEM.
041892,000296:
041893,000297: 05,3665 30336 FETCH2WD CA DNECADR
041894,000298: 05,3666 54003 TS EBANK # SET EBANK
041895,000299: 05,3667 74357 MASK LOW8 # ISOLATE RELATIVE ADDRESS
041896,000300: 05,3670 54001 TS L
041897,000301: 05,3671 33536 CA DNADRDCR # DECREMENT COUNT AND ECADR
041898,000302: 05,3672 26336 ADS DNECADR
041899,000303: 05,3673 00006 EXTEND
041900,000304: 05,3674 50001 INDEX L
041901,000305: 05,3675 E3,1400 EBANK= 1400
041902,000306: 05,3675 31401 DCA 1400 # PICK UP 2 DATA WORDS
041903,000307: 05,3676 0340 EBANK= DNTMBUFF
041904,000308: 05,3676 13713 TCF DNTMEXIT # NOW GO SEND THEM.
041905,000309:
041906,000310: 05,3677 54337 DOSUBLST TS SUBLIST # SET SUBLIST POINTER
041907,000311: 05,3700 50337 NEXTINSL INDEX SUBLIST
041908,000312: 05,3701 00000 0 0 # = CA SSSS (SSSS = NEXT ENTRY IN SUBLIST)
041909,000313: 05,3702 10000 CCS A # IS IT THE END OF THE SUBLIST
041910,000314: 05,3703 24337 INCR SUBLIST # NO --
041911,000315: 05,3704 13710 TCF +4
041912,000316: 05,3705 54337 TS SUBLIST # SAVE A.
041913,000317: 05,3706 37752 CA NEGONE # SET SUBLIST TO MINUS
041914,000318: 05,3707 56337 XCH SUBLIST # RETRIEVE A.
041915,000319: 05,3710 24000 +4 INCR A
041916,000320: 05,3711 54336 TS DNECADR # SAVE DNADR
041917,000321: 05,3712 13571 TCF SETWO +2 # GO USE COMMON CODING (PROLEMS WOULD
041918,000322: # OCCUR IF THE PROGRAM ENCOUNTERED A
041919,000323: # DNPTR NOW)
041920,000324:
041921,000325: 05,3713 00006 DNTMEXIT EXTEND # DOWN-TELEMETRY EXIT
041922,000326: 05,3714 01034 WRITE DNTM1 # TO SEND A + L TO CHANNELS 34 + 35
041923,000327: 05,3715 30001 CA L # RESPECTIVELY
041924,000328: 05,3716 00006 TMEXITL EXTEND
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Page 994 |
041926,000330: 05,3717 01035 WRITE DNTM2
041927,000331: 05,3720 15270 TMRESUME TCF RESUME # EXIT TELEMTRY PROGRAM VIA RESUME.
041928,000332:
041929,000333: 05,3721 7744 MINB12 EQUALS -1/8
041930,000334: 05,3721 0336 DNECADR EQUALS TMINDEX
041931,000335: 05,3721 0334 CTLIST EQUALS LDATALST
041932,000336: 05,3721 0337 SUBLIST EQUALS DNQ
041933,000337:
041934,000338: # MOD BY -- DENSMORE -- JUNE 1969 -- ELIMINATE ERASABLE DUMP COUNT
041935,000339:
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Page 995 |
041937,000341: # SUBROUTINE NAME -- DNDUMP
041938,000342:
041939,000343: # FUNCTIONAL DESCRIPTION -- TO SEND (DUMP) ALL 8 BANKS OF ERASABLE STORAGE TWICE. BANKS ARE SENT ONE AT A TIME
041940,000344: # EACH BANK IS PRECEDED BY AN ID WORD, SYNCH BITS, ECADR AND TIME1 FOLLOWED BY THE 256D WORDS OF EACH
041941,000345: # EBANK. EBANKS ARE DUMPED IN ORDER (I.E., EBANK 0 FIRST, THEN EBANK1 ETC.)
041942,000346:
041943,000347: # CALLING SEQUENCE -- THE GROUND OR ASTRONAUT BY KEYING V74E CAN INITIALIZE THE DUMP.
041944,000348: # AFTER KEYING IN V74E THE CURRENT DOWNLIST WILL BE IMMEDIATELY TERMINATED AND THE DOWNLINK ERASABLE DUMP
041945,000349: # WILL BEGIN.
041946,000350:
041947,000351: # ONCE INITITIATED THE DOWNLINK ERASABLE DUMP CAN BE TERMINATED (AND INTERRUPTED DOWNLIST REINSTATED) ONLY
041948,000352: # BY THE FOLLOWING:
041949,000353:
041950,000354: # 1. A FRESH START
041951,000355: # 2. COMPLETION OF BOTH COMPLETE DUMPS
041952,000356: # 3. AND INVOLUNTARILY BY A RESTART.
041953,000357:
041954,000358: # NORMAL EXIT MODE -- TCF DNPHASE1
041955,000359:
041956,000360: # ALARM OR ABORT MODE -- NONE
041957,000361:
041958,000362: # *SUBROUTINES CALLED -- NONE
041959,000363:
041960,000364: # ERASABLE INITIALIZATION REQUIRED --
041961,000365: # NONE
041962,000366:
041963,000367: # DEBRIS -- DUMPLOC, DUMPSW, DNTMGOTO, EBANK, AND CENTRAL REGISTERS
041964,000368:
041965,000369: # TIMING -- TIME (IN SECS) = ((NO.DUMPS)*(NO.EBANKS)*(WDSPEREBANK + NO.IDWDS)) / NO.WDSPERSEC
041966,000370: # TIME (IN SECS) = ( 4 )*( 8 )*( 256 + 4 ) / 100
041967,000371: # THUS TIME (IN SECS TO SEND DUMP OF ERASABLE 4 TIMES VIA DOWNLINK) = 83.2 SECONDS
041968,000372:
041969,000373: # STRUCTURE OF ONE EBANK AS IT IS SENT BY DOWNLINK PROGRAM --
041970,000374: # (REMINDER -- THIS ONLY DESCRIBES ONE OF THE 8 EBANKS X 4 (DUMPS) = 32 EBANKS WHICH WILL BE SENT BY DNDUMP)
041971,000375:
041972,000376: # DOWNLIST W
041973,000377: # WORD TAKEN FROM CONTENTS OF EXAMPLE O COMMENTS
041974,000378: # 1 ERASID 0177X 0 DOWNLIST I.D. FOR DOWNLINK ERASABLE DUMP (X=7 CSM, 6 LM)
041975,000379: # 2 LOWIDCOD 77340 1 DOWNLINK SYNCH BITS. (SAME ONE USED IN ALL OTHER DOWNLISTS)
041976,000380: # 3 DUMPLOC 13400 1 (SEE NOTES ON DUMPLOC) 1 = 3RD ERAS DUMP, 3400=ECADR OF 5TH WD
041977,000381: # 4 TIME1 14120 1 TIME IN CENTISECONDS
041978,000382: # 5 FIRST WORD OF EBANK X 03400 1 IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1400 (ECADR 3400)
041979,000383: # 6 2ND WORD OF EBANK X 00142 1 IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1401 (ECADR 3401)
041980,000384: # 7. 3RD WORD OF EBANK X 00142 1 IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1402 (ECADR 3402)
041981,000385: # .
041982,000386: # .
041983,000387: # .
041984,000388: # 260D 256TH WORD OF EBANK X 03777 1 IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1777 (ECADR 3777)
041985,000389:
041986,000390: # NOTE -- DUMPLOC CONTAINS THE COUNTER AND ECADR FOR EACH WORD BEING SENT.
041987,000391: # THE BIT STRUCTURE OF DUMPLOC IS FOLLOW --
041988,000392: # X = NOT USED
041989,000393: # X ABC EEE RRRRRRRR ABC = ERASABLE DUMP COUNTER (I.E. ABC = 0,1,2, OR 3 WHICH MEANS THAT
041990,000394: # COMPLETE ERASABLE DUMP NUMBER 1,2,3, OR 4 RESPECTIVELY IS IN PROGRESS)
041991,000395: # EEE = EBANK BITS
041992,000396: # RRRRRRRR = RELATIVE ADDRESS WITHIN AN EBANK
041993,000397:
041994,000398: 05,3721 34755 DNDUMPI CA ZERO # INITIALIZE DOWNLINK
041995,000399: 05,3722 54336 TS DUMPLOC # ERASABLE DUMP
041996,000400: 05,3723 03764 +2 TC SENDID # GO SEND ID AND SYNCH BITS
041997,000401:
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Page 996 |
041999,000403: 05,3724 33733 CA LDNDUMP1 # SET DNTMGOTO
042000,000404: 05,3725 54335 TS DNTMGOTO # TO LOCATION FOR NEXT PASS
042001,000405: 05,3726 30025 CA TIME1 # PLACE TIME1
042002,000406: 05,3727 56001 XCH L # INTO L
042003,000407: 05,3730 30336 CA DUMPLOC # AND ECADR OF THIS EBANK INTO A
042004,000408: 05,3731 13713 TCF DNTMEXIT # SEND DUMPLOC AND TIME1
042005,000409:
042006,000410: 05,3732 03734 LDNDUMP ADRES DNDUMP
042007,000411: 05,3733 03746 LDNDUMP1 ADRES DNDUMP1
042008,000412:
042009,000413: 05,3734 34752 DNDUMP CA TWO # INCREMENT ECADR IN DUMPLOC
042010,000414: 05,3735 26336 ADS DUMPLOC # TO NEXT DP WORD TO BE
042011,000415: 05,3736 74357 MASK LOW8 # DUMPED AND SAVE IT.
042012,000416: 05,3737 10000 CCS A # IS THIS THE BEGINNING OF A NEW EBANK
042013,000417: 05,3740 13750 TCF DNDUMP2 # NO -- THEN CONTINUE DUMPING
042014,000418: 05,3741 30336 CA DUMPLOC # YES -- IS THIS THE END OF THE
042015,000419: 05,3742 74737 MASK BIT13 # SECOND COMPLETE ERASABLE DUMP?
042016,000420: 05,3743 00006 EXTEND
042017,000421: 05,3744 13723 BZF DNDUMPI +2 # NO -- GO BACK AND INITIALIZE NEXT BANK
042018,000422: 05,3745 13522 TCF DNPHASE1 # YES -- SEND DOWNLIST AGAIN
042019,000423: 05,3746 33732 DNDUMP1 CA LDNDUMP # SET DNTMGOTO
042020,000424: 05,3747 54335 TS DNTMGOTO # FOR WORDS 3 TO 256D OF CURRENT EBANK
042021,000425:
042022,000426: 05,3750 30336 DNDUMP2 CA DUMPLOC
042023,000427: 05,3751 54003 TS EBANK # SET EBANK
042024,000428: 05,3752 74357 MASK LOW8 # ISOLATE RELATIVE ADDRESS.
042025,000429: 05,3753 54002 TS Q # (NOTE: MASK INSTRUCTION IS USED TO PICK
042026,000430: 05,3754 34754 CA NEG0 # UP ERASABLE REGISTERS TO THAT EDITING
042027,000431: 05,3755 54001 TS L # REGISTERS 20-23 WILL NOT BE ALTERED.)
042028,000432: 05,3756 50002 INDEX Q
042029,000433: 05,3757 E3,1400 EBANK= 1400 # PICK UP LOW ORDER REGISTER OF PAIR
042030,000434: 05,3757 71401 MASK 1401 # OF ERASABLE REGISTERS.
042031,000435: 05,3760 56001 XCH L
042032,000436: 05,3761 50002 INDEX Q # PICK UP HIGH ORDER REGISTER OF PAIR
042033,000437: 05,3762 71400 MASK 1400 # OF ERASABLE REGISTERS.
042034,000438: 05,3763 0340 EBANK= DNTMBUFF
042035,000439: 05,3763 13713 TCF DNTMEXIT # GO SEND THEM
042036,000440:
042037,000441: 05,3764 00006 SENDID EXTEND # ** ENTRANCE USED BY ERASABLE DUMP PROG. **
042038,000442: 05,3765 22335 QXCH DNTMGOTO # SET DNTMGOTO SO NEXT TIME PROG WILL GO
042039,000443: 05,3766 35011 CAF ERASID # TO LOCATION FOLLOWING `TC SENDID'
042040,000444:
042041,000445: 05,3767 54001 TS L # ** ENTRANCE USED BY REGULAR DOWNLINK PG **
042042,000446: 05,3770 03612 TC WOZERO # GO SET WORD ORDER CODE TO ZERO
042043,000447: 05,3771 32065 CAF LOWIDCOD # PLACE SPECIAL ID CODE INTO L
042044,000448: 05,3772 56001 XCH L # AND ID BACK INTO A
042045,000449: 05,3773 13713 TCF DNTMEXIT # SEND DOWNLIST ID CODE(S).
042046,000450:
End of include-file DOWN_TELEMETRY_PROGRAM.agc. Parent file is MAIN.agc