Source Code
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These source-code files are part of a reconstructed copy of Luminary 173, the
second (unflown) release of the Apollo 14 Lunar Module (LM) Apollo Guidance
Computer (AGC) software.
The reconstruction began with reconstructed source code for Luminary 178. Changes
between revision 173 and 178 were backed out, as described by Luminary memo 167
(revision 1). The reconstruction was verified by matching memory-bank checksums
to those listed in drawing 2021152N. Note that page numbers in the reconstructed
code match those for the baseline log section mentioned in each file's changelog;
the page numbers for a real Luminary 173 listing would be different.
Comments from the original source code are prefixed with a single '#' symbol,
whereas comments added later are prefixed by "##" or "###". Report any errors
noted by creating an
issue report at the Virtual AGC
project's GitHub repository.
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042448,000002: ## Copyright: Public domain.
042449,000003: ## Filename: DOWN-TELEMETRY_PROGRAM.agc
042450,000004: ## Purpose: A section of Luminary revision 173.
042451,000005: ## It is part of the reconstructed source code for the second
042452,000006: ## (unflown) release of the flight software for the Lunar
042453,000007: ## Module's (LM) Apollo Guidance Computer (AGC) for Apollo 14.
042454,000008: ## The code has been recreated from a reconstructed copy of
042455,000009: ## Luminary 178, as well as Luminary memo 167 (revision 1).
042456,000010: ## It has been adapted such that the resulting bugger words
042457,000011: ## exactly match those specified for Luminary 173 in NASA
042458,000012: ## drawing 2021152N, which gives relatively high confidence
042459,000013: ## that the reconstruction is correct.
042460,000014: ## Reference: pp. 979-988
042461,000015: ## Assembler: yaYUL
042462,000016: ## Contact: Ron Burkey <info@sandroid.org>.
042463,000017: ## Website: www.ibiblio.org/apollo/index.html
042464,000018: ## Mod history: 2019-09-18 MAS Created from Luminary 178.
042465,000019:
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Page 979
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042467,000021: # PROGRAM NAME- DOWN TELEMETRY PROGRAM
042468,000022: # MOD NO.- 0 TO COMPLETELY REWRITE THE DOWN TELEMETRY PROGRAM AND DOWNLINK ERASABLE DUMP PROGRAM FOR THE
042469,000023: # PURPOSE OF SAVING APPROXIMATELY 150 WORDS OF CORE STORAGE.
042470,000024: # THIS CHANGE REQUIRES AN ENTIRELY NEW METHOD OF SPECIFYING DOWNLINK LISTS.REFER TO DOWNLINK
042471,000025: # LISTS LOG SECTION FOR MORE DETAILS. HOWEVER THIS CHANGE WILL NOT AFFECT THE GROUND PROCESSING
042472,000026: # OF DOWN TELEMETRY DATA.
042473,000027: # MOD BY- KILROY, SMITH, DEWITT
042474,000028: # DATE- 02OCT67
042475,000029: # AUTHORS- KILROY, SMITH, DEWITT, DEWOLF, FAGIN
042476,000030: # LOG SECTION- DOWN-TELEMETRY PROGRAM
042477,000031: # FUNCTIONAL DESCRIPTION- THIS ROUTINE IS INITIATED BY TELEMETRY END
042478,000032: # PULSE FROM THE DOWNLINK TELEMETRY CONVERTER. THIS PULSE OCCURS
042479,000033: # AT 50 TIMES PER SEC(EVERY 20 MS) THEREFORE DODOWNTM IS
042480,000034: # EXECUTED AT THESE RATES. THIS ROUTINE SELECTS THE APPROPRIATE
042481,000035: # AGC DATA TO BE TRANSMITTED DOWNLINK AND LOADS IT INTO OUTPUT
042482,000036: # CHANNELS 34 AND 35. THE INFORMATION IS THEN GATED OUT FROM THE
042483,000037: # LGC IN SERIAL FASHION.
042484,000038: # THIS PROGRAM IS CODED FOR A 2 SECOND DOWNLIST. SINCE DOWNRUPTS
042485,000039: # OCCUR EVERY 20MS AND 2 AGC COMPUTER WORDS CAN BE PLACED IN
042486,000040: # CHANNELS 34 AND 35 DURING EACH DOWNRUPT THE PROGRAM IS CAPABLE
042487,000041: # OF SENDING 200 AGC WORDS EVERY 2 SECONDS.
042488,000042: # CALLING SEQUENCE- NONE
042489,000043: # PROGRAM IS ENTERED VIA TCF DODOWNTM WHICH IS EXECUTED AS A
042490,000044: # RESULT OF A DOWNRUPT. CONTROL IS RETURNED VIA TCF RESUME WHICH
042491,000045: # IN EFFECT IS A RESUME.
042492,000046: # SUBROUTINES CALLED- NONE
042493,000047: # NORMAL EXIT MODE- TCF RESUME
042494,000048: # ALARM OR ABORT EXIT MODE- NONE
042495,000049: # RESTART PROTECTION:
042496,000050: # ON A FRESH START AND RESTART THE 'STARTSUB' SUBROUTINE WILL INITIALIZE THE DOWNLIST POINTER(ACTUALLY
042497,000051: # DNTMGOTO) TO THE BEGINNING OF THE CURRENT DOWNLIST(I.E. CURRENT CONTENTS OF DNLSTADR). THIS HAS THE
042498,000052: # EFFECT OF IGNORING THE REMAINDER OF THE DOWNLIST WHICH THE DOWN-TELEMETRY PROGRAM WAS WORKING ON WHEN
042499,000053: # THE RESTART(OR FRESH START) OCCURRED AND RESUME DOWN TELEMETRY FROM THE BEGINNING OF THE CURRENT
042500,000054: # DOWNLIST.
042501,000055: # ALSO OF INTEREST IS THE FACT THAT ON A RESTART THE AGC WILL ZERO DOWNLINK CHANNELS 13, 34 AND 35.
042502,000056: # DOWNLINK LIST SELECTION:
042503,000057: # THE APPROPRIATE DOWNLINK LISTS ARE SELECTED BY THE FOLLOWING:
042504,000058: # 1. FRESH START
042505,000059: # 2. V37EXXE WHERE XX = THE MAJOR MODE BEING SELECTED.
042506,000060: # 3. UPDATE PROGRAM(P27)
042507,000061: # 4. NON-V37 SELECTABLE TYPE PROGRAMS(E.G. AGS INITIALIZATION(SUNDANCE,LUMINARY) AND P61-P62
042508,000062: # TRANSITION(COLOSSUS) ETC.).
042509,000063: # DOWNLINK LIST RULES AND LIMITATIONS:
042510,000064: # READ SECTION(S) WHICH FOLLOW 'DEBRIS' WRITEUP.
042511,000065: # OUTPUT- EVERY 2 SECONDS 100 DOUBLE PRECISION WORDS(I.E. 200 LGC
042512,000066: # COMPUTER WORDS) ARE TRANSMITTED VIA DOWNLINK.
042513,000067: # ERASABLE INITIALIZATION REQUIRED- NONE
042514,000068: # 'DNTMGOTO' AND 'DNLSTADR' ARE INITIALIZED BY THE FRESH START PROGRAM.
042515,000069: # DEBRIS(ERASABLE LOCATIONS DESTROYED BY THIS PROGRAM)-
042516,000070: # LDATALST,DNTMBUFF TO DNTMBUFF +21D,TMINDEX,DNQ.
042517,000071:
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Page 980
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042519,000073:
042520,000074:
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Page 981
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042522,000076: # DODOWNTM IS ENTERED EVERY 20 MS BY AN INTERRUPT TRIGGERED BY THE
042523,000077: # RECEIPT OF AN ENDPULSE FROM THE SPACECRAFT TELEMETRY PROGRAMMER.
042524,000078:
042525,000079: # NOTES REGARDING DOWNLINK LISTS ASSOCIATED WITH THIS PROGRAM:
042526,000080: # 1. DOWNLISTS. - DOWNLISTS MUST BE COMPILED IN THE SAME BANK AS THE
042527,000081: # DOWN-TELEMETRY PROGRAM. THIS IS DONE FOR EASE OF CODING, FASTER
042528,000082: # EXECUTION.
042529,000083: # 2. EACH DOWNLINK LIST CONSISTS OF A CONTROL LIST AND A NUMBER OF
042530,000084: # SUBLISTS.
042531,000085: # 3. A SUBLIST REFERS TO A SNAPSHOT OR DATA COMMON TO THE SAME OR OTHER
042532,000086: # DOWNLINK LISTS. ANY SUBLIST CONTAINING COMMON DATA NEEDS TO BE
042533,000087: # CODED ONLY ONCE FOR THE APPLICABLE DOWNLINK LISTS.
042534,000088: # 4. SNAPSHOT SUBLISTS REFER SPECIFICALLY TO HOMOGENOUS DATA WHICH MUST BE
042535,000089: # SAVED IN A BUFFER DURING ONE DOWNRUPT.
042536,000090: # 5. THE 1DNADR FOR THE 1ST WORD OF SNAPSHOT DATA IS FOUND AT THE END
042537,000091: # OF EACH SNAPSHOT SUBLIST, SINCE THE PROGRAM CODING SENDS THIS DP WORD
042538,000092: # IMMEDIATELY AFTER STORING THE OTHERS IN THE SNAPSHOT BUFFER.
042539,000093: # 6. ALL LISTS ARE COMBINATIONS OF CODED ERASABLE ADDRESS CONSTANTS
042540,000094: # CREATED FOR THE DOWNLIST PROGRAM.
042541,000095: # A. 1DNADR 1-WORD DOWNLIST ADDRESS.
042542,000096: # SAME AS ECADR, BUT USED WHEN THE WORD ADDRESSED IS THE LEFT
042543,000097: # HALF OF A DOUBLE-PRECISION WORD FOR DOWN TELEMETRY.
042544,000098: # B. 2DNADR - 6DNADR N-WORD DOWNLIST ADDRESS, N = 2 - 6.
042545,000099: # SAME AS 1DNADR, BUT WITH THE 4 UNUSED BITS OF THE ECADR FORMAT
042546,000100: # FILLED IN WITH 0001-0101. USED TO POINT TO A LIST OF N DOUBLE-
042547,000101: # PRECISION WORDS, STORED CONSECUTIVELY, FOR DOWN TELEMETRY.
042548,000102: # C. DNCHAN DOWNLIST CHANNEL ADDRESS.
042549,000103: # SAME AS 1DNADR, BUT WITH PREFIX BITS 0111. USED TO POINT TO
042550,000104: # A PAIR OF CHANNELS FOR DOWN TELEMETRY.
042551,000105: # D. DNPTR DOWN TELEMETRY SUBLIST POINTER.
042552,000106: # SAME AS CAF BUT TAGGED AS A CONSTANT. USED IN CONTROL LIST TO POINT TO A SUBLIST.
042553,000107: # CAUTION--- A DNPTR CANNOT BE USED IN A SUBLIST.
042554,000108: # 7. THE WORD ORDER CODE IS SET TO ZERO AT THE BEGINNING OF EACH DOWNLIST (I.E. CONTROL LIST) AND WHEN
042555,000109: # A '1DNADR TIME2' IS DETECTED IN THE CONTROL LIST(ONLY).
042556,000110: # 8. IN THE SNAPSHOT SUBLIST ONLY, THE DNADR'S CANNOT POINT TO THE FIRST WORD OF ANY EBANK.
042557,000111:
042558,000112: # DOWNLINK LIST RESTRICTIONS:
042559,000113: # (THE FOLLOWING POINTS MAY BE LISTED ELSEWHERE BUT ARE LISTED HERE SO IT IS CLEAR THAT THESE THINGS CANNOT BE
042560,000114: # DONE)
042561,000115: # 1. SNAPSHOT DOWNLIST:
042562,000116: # (A) CANNOT CONTAIN THE FOLLOWING ECADRS(I.E. 1DNADR'S): 0, 400, 1000, 1400, 2000, 2400, 3000, 3400.
042563,000117: # (B) CAN CONTAIN ONLY 1DNADR'S
042564,000118:
042565,000119: # 2. ALL DOWNLINKED DATA(EXCEPT CHANNELS) IS PICKED UP BY A <DCA<SO DOWNLINK LISTS CANNOT CONTAIN THE
042566,000120: # EQUIVALENT OF THE FOLLOWING ECADRS(I.E. IDNADRS): 377, 777, 1377, 1777, 2377, 27777, 3377, 3777.
042567,000121:
042568,000122: # (NOTE: THE TERM EQUIVALENT ' MEANT THAT THE IDNADR TO 6DNADR WILL BE PROCESSED LIKE 1 TO 6 ECADRS)
042569,000123:
042570,000124: # 3. CONTROL LISTS AND SUBLISTS CANNOT HAVE ENTRIES = OCTAL 00000 OR OCTAL 77777
042571,000125:
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Page 982
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042573,000127: # 4. THE '1DNADR TIME2' WHICH WILL CAUSE THE DOWNLINK PROGRAM TO SET THE WORDER CODE TO 3 MUST APPEAR IN THE
042574,000128: # CONTROL SECTION OF THE DOWNLIST.
042575,000129:
042576,000130: # 5. 'DNCHAN 0' CANNOT BE USED.
042577,000131:
042578,000132: # 6. 'DNPTR 0' CANNOT BE USED.
042579,000133:
042580,000134: # 7. DNPTR CANNOT APPEAR IN A SUBLIST.
042581,000135:
042582,000136:
042583,000137:
042584,000138:
042585,000139: # EBANK SETTINGS
042586,000140: # IN THE PROCESS OF SETTING THE EBANK(WHEN PICKING UP DOWNLINK DATA) THE DOWN TELEMETRY PROGRAM PUTS
042587,000141: # 'GARBAGE' INTO BITS15-12 OF EBANK. HUGH BLAIR-SMITH WARNS US THAT BITS15-12 OF EBANK MAY BECOME
042588,000142: # SIGNIFICANT SOMEDAY IN THE FUTURE. IF/WHEN THAT HAPPENS, THE PROGRAM SHOULD INSURE(BY MASKING ETC.)
042589,000143: # THAT BITS15-12 OF EBANK ARE ZERO.
042590,000144: # INITIALIZATION REQUIRED- TO INTERRUPT CURRENT LIST AND START A NEW ONE..
042591,000145: # 1. ADRES OF DOWNLINK LIST INTO DNLSTADR
042592,000146: # 2. NEGONE INTO SUBLIST
042593,000147: # 3. NEGONE INTO DNECADR
042594,000148:
042595,000149: 22,3710 BANK 22
042596,000150: 05,2000 SETLOC DOWNTELM
042597,000151: 05,2000 BANK
042598,000152:
042599,000153: 05,3510 0340 EBANK= DNTMBUFF
042600,000154:
042601,000155: 05,3510 COUNT* $$/DPROG
042602,000156: 05,3510 54016 DODOWNTM TS BANKRUPT
042603,000157: 05,3511 00006 EXTEND
042604,000158: 05,3512 22012 QXCH QRUPT # SAVE Q
042605,000159: 05,3513 34745 CA BIT7 # AT THE BEGINNING OF THE LIST THE WORD
042606,000160: 05,3514 00006 EXTEND # ORDER BIT WILL BE SET BACK TO ZERO.
042607,000161: 05,3515 02013 RAND CHAN13
042608,000162: 05,3516 10000 CCS A
042609,000163: 05,3517 00335 TC DNTMGOTO
042610,000164: 05,3520 06022 TC C13STALL
042611,000165: 05,3521 34745 CA BIT7
042612,000166: 05,3522 00006 EXTEND # SET WORD ORDER BIT TO 1 ONLY IF IT
042613,000167: 05,3523 05013 WOR CHAN13 # ALREADY ISN'T.
042614,000168: 05,3524 00335 TC DNTMGOTO # GO TO APPROPRIATE PHASE OF PROGRAM
042615,000169:
042616,000170: 05,2000 SETLOC DOWNTELM
042617,000171: 05,2000 BANK
042618,000172:
042619,000173: 05,3525 37752 DNPHASE1 CA NEGONE # INITIALIZE ALL CONTROL WORDS
042620,000174: 05,3526 54337 TS SUBLIST # WORDS TO MINUS ONE
042621,000175: 05,3527 54336 TS DNECADR
042622,000176: 05,3530 33655 CA LDNPHAS2 # SET DNTMGOTO =O ALL SUBSEQUENT DOWNRUPTS
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Page 983
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042624,000178: 05,3531 54335 TS DNTMGOTO # GO TO DNPHASE2
042625,000179: 05,3532 13546 TCF NEWLIST
042626,000180: 05,3533 10336 DNPHASE2 CCS DNECADR # SENDING OF DATA IN PROGRESS
042627,000181: 05,3534 03670 DODNADR TC FETCH2WD # YES - THEN FETCH THE NEXT 2 SP WORDS
042628,000182: 05,3535 77753 MINTIME2 -1DNADR TIME2 # NEGATIVE OF TIME2 1DNADR
042629,000183: 05,3536 13537 TCF +1 # (ECADR OF 3776 + 74001 = 77777)
042630,000184:
042631,000185: 05,3537 10337 CCS SUBLIST # IS THE SUBLIST IN CONTROL
042632,000186: 05,3540 13703 TCF NEXTINSL # YES
042633,000187: 05,3541 74001 DNADRDCR OCT 74001 # DNADR COUNT AND ECADR DECREMENTER
042634,000188:
042635,000189: 05,3542 30334 CHKLIST CA CTLIST
042636,000190: 05,3543 00006 EXTEND
042637,000191: 05,3544 63546 BZMF NEWLIST # IT WILL BE NEGATIVE AT END OF LIST
042638,000192: 05,3545 13553 TCF NEXTINCL
042639,000193: 05,3546 50333 NEWLIST INDEX DNLSTCOD
042640,000194: 05,3547 32452 CA DNTABLE # INITIALIZE CTLIST WITH
042641,000195: 05,3550 54334 TS CTLIST # STARTING ADDRESS OF NEW LIST
042642,000196: 05,3551 40333 CS DNLSTCOD
042643,000197: 05,3552 13772 TCF SENDID +3
042644,000198: 05,3553 50334 NEXTINCL INDEX CTLIST
042645,000199: 05,3554 30000 CA 0
042646,000200: 05,3555 10000 CCS A
042647,000201: 05,3556 24334 INCR CTLIST # SET POINTER TO PICK UP NEXT CTLIST WORD
042648,000202: 05,3557 13563 TCF +4 # ON NEXT ENTRY TO PROG. (A SHOULD NOT =0)
042649,000203: 05,3560 56334 XCH CTLIST # SET CTLIST TO NEGATIVE AND PLACE(CODING)
042650,000204: 05,3561 40000 COM # UNCOMPLEMENTED DNADR INTO A. (FOR LA)
042651,000205: 05,3562 56334 XCH CTLIST # (ST IN )
042652,000206: 05,3563 24000 +4 INCR A # (CTLIST)
042653,000207: 05,3564 54336 TS DNECADR # SAVE DNADR
042654,000208: 05,3565 63535 AD MINTIME2 # TEST FOR TIME2 (NEG. OF ECADR)
042655,000209: 05,3566 10000 CCS A
042656,000210: 05,3567 13573 TCF SETWO +1 # DON'T SET WORD ORDER CODE
042657,000211: 05,3570 47777 MINB1314 OCT 47777 # MINUS BIT 13 AND 14 (CAN'T GET HERE)
042658,000212: 05,3571 13573 TCF SETWO +1 # DON'T SET WORD ORDER CODE
042659,000213: 05,3572 03615 SETWO TC WOZERO # GO SET WORD ORDER CODE TO ZERO.
042660,000214: 05,3573 30336 +1 CA DNECADR # RELOAD A WITH THE DNADR.
042661,000215: 05,3574 63570 +2 AD MINB1314 # IS THIS A REGULAR DNADR?
042662,000216: 05,3575 00006 EXTEND
042663,000217: 05,3576 63670 BZMF FETCH2WD # YES. (A MUST NEVER BE ZERO)
042664,000218: 05,3577 67744 AD MINB12 # NO- IS IT A POINTER (DNPTR) OR A
042665,000219: 05,3600 00006 EXTEND # CHANNEL(DNCHAN)
042666,000220: 05,3601 63626 BZMF DODNPTR # IT'S A POINTER. (A MUST NEVER BE ZERO)
042667,000221:
042668,000222: 05,3602 00006 DODNCHAN TC 6 # (EXECUTED AS EXTEND) IT S A CHANNEL
042669,000223: 05,3603 50336 INDEX DNECADR
042670,000224: 05,3604 44000 INDEX 0 -4000 # (EXECUTED AS READ)
042671,000225: 05,3605 54001 TS L
042672,000226: 05,3606 00006 TC 6 # (EXECUTED AS EXTEND)
042673,000227: 05,3607 50336 INDEX DNECADR
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Page 984
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042675,000229: 05,3610 43777 INDEX 0 -4001 # (EXECUTED AS READ)
042676,000230: 05,3611 54336 TS DNECADR # SET DNECADR
042677,000231: 05,3612 37752 CA NEGONE # TO MINUS
042678,000232: 05,3613 56336 XCH DNECADR # WHILE PRESERVING A.
042679,000233: 05,3614 13716 TCF DNTMEXIT # GO SEND CHANNELS
042680,000234:
042681,000235: 05,3615 00006 WOZERO EXTEND
042682,000236: 05,3616 23265 QXCH C13QSAV
042683,000237: 05,3617 22070 LXCH RUPTREG1
042684,000238: 05,3620 06022 TC C13STALL
042685,000239:
042686,000240: 05,3621 22070 LXCH RUPTREG1
042687,000241: 05,3622 44745 CS BIT7
042688,000242: 05,3623 00006 EXTEND
042689,000243: 05,3624 03013 WAND CHAN13 # SET WORD ORDER CODE TO ZERO
042690,000244: 05,3625 01265 TC C13QSAV
042691,000245:
042692,000246: 05,3626 50336 DODNPTR INDEX DNECADR # DNECADR CONTAINS ADRES OF SUBLIST
042693,000247: 05,3627 00000 0 0 # CLEAR AND ADD LIST ENTRY INTO A.
042694,000248: 05,3630 10000 CCS A # IS THIS A SNAPSHOT SUBLIST
042695,000249: 05,3631 30336 CA DNECADR # NO, IT IS A REGULAR SUBLIST.
042696,000250: 05,3632 13702 TCF DOSUBLST # A MUST NOT BE ZERO.
042697,000251:
042698,000252: 05,3633 56336 XCH DNECADR # YES, IT IS A SNAPSHOT SUBLIST.
042699,000253: 05,3634 54337 TS SUBLIST # C(DNECADR) INTO SUBLIST
042700,000254: 05,3635 34755 CAF ZERO # A INTO A
042701,000255: 05,3636 56336 XCH TMINDEX # (NOTE.. TMINDEX = DNECADR)
042702,000256:
042703,000257:
042704,000258: # THE FOLLOWING CODING (FROM SNAPLOOP TO SNAPEND)IS FOR THE PURPOSE OF TAKING A SNAPSHOT OF 12 DP REGISTERS.
042705,000259: # THIS IS DONE BY SAVING 11 DP REGISTERS IN DNTMBUFF AND SENDING THE FIRST DP WORD IMMEDIATELY.
042706,000260: # THE SNAPSHOT PROCESSING IS THE MOST TIME CONSUMING AND THEREFORE THE CODING AND LIST STRUCTURE WERE DESIGNED
042707,000261: # TO MINIMIZE TIME. THE TIME OPTIMIZATION RESULTS IN RULES UNIQUE TO THE SNAPSHOT PORTION OF THE DOWNLIST.
042708,000262: # THESE RULES ARE......
042709,000263: # 1. ONLY 1DNADR'S CAN APPEAR IN THE SNAPSHOT SUBLIST
042710,000264: # 2. THE 1DNADR'S CANNOT REFER TO THE FIRST LOCATION IN ANY BANK.
042711,000265:
042712,000266: 05,3637 54003 SNAPLOOP TS EBANK # SET EBANK
042713,000267: 05,3640 74357 MASK LOW8 # ISOLATE RELATIVE ADDRESS
042714,000268: 05,3641 00006 EXTEND
042715,000269: 05,3642 50000 INDEX A
042716,000270: 05,3643 E3,1401 EBANK= 1401
042717,000271: 05,3643 31402 DCA 1401 # PICK UP 2 SNAPSHOT WORDS.
042718,000272: 05,3644 0340 EBANK= DNTMBUFF
042719,000273: 05,3644 50336 INDEX TMINDEX
042720,000274: 05,3645 52341 DXCH DNTMBUFF # STORE 2 SNAPSHOT WORDS IN BUFFER
042721,000275: 05,3646 24336 INCR TMINDEX # SET BUFFER INDEX FOR NEXT 2 WORDS.
042722,000276: 05,3647 24336 INCR TMINDEX
042723,000277: 05,3650 24337 SNAPAGN INCR SUBLIST # SET POINTER TO NEXT 2 WORDS OF SNAPSHOT
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Page 985
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042725,000279: 05,3651 50337 INDEX SUBLIST
042726,000280: 05,3652 00000 0 0 # = CA SSSS (SSSS = NEXT ENTRY IN SUBLIST)
042727,000281: 05,3653 10000 CCS A # TEST FOR LAST TWO WORDS OF SNAPSHOT.
042728,000282: 05,3654 13637 TCF SNAPLOOP # NOT LAST TWO.
042729,000283: 05,3655 03533 LDNPHAS2 GENADR DNPHASE2
042730,000284: 05,3656 54337 TS SUBLIST # YES, LAST. SAVE A.
042731,000285: 05,3657 37752 CA NEGONE # SET DNECADR AND
042732,000286: 05,3660 54336 TS DNECADR # SUBLIST POINTERS
042733,000287: 05,3661 56337 XCH SUBLIST # TO NEGATIVE VALUES.
042734,000288: 05,3662 54003 TS EBANK
042735,000289: 05,3663 74357 MASK LOW8
042736,000290: 05,3664 00006 EXTEND
042737,000291: 05,3665 50000 INDEX A
042738,000292: 05,3666 E3,1401 EBANK= 1401
042739,000293: 05,3666 31402 DCA 1401 # PICK UP FIRST 2 WORDS OF SNAPSHOT.
042740,000294: 05,3667 0340 EBANK= DNTMBUFF
042741,000295: 05,3667 13716 SNAPEND TCF DNTMEXIT # NOW GO SEND THEM.
042742,000296:
042743,000297: 05,3670 30336 FETCH2WD CA DNECADR
042744,000298: 05,3671 54003 TS EBANK # SET EBANK
042745,000299: 05,3672 74357 MASK LOW8 # ISOLATE RELATIVE ADDRESS
042746,000300: 05,3673 54001 TS L
042747,000301: 05,3674 33541 CA DNADRDCR # DECREMENT COUNT AND ECADR
042748,000302: 05,3675 26336 ADS DNECADR
042749,000303: 05,3676 00006 EXTEND
042750,000304: 05,3677 50001 INDEX L
042751,000305: 05,3700 E3,1400 EBANK= 1400
042752,000306: 05,3700 31401 DCA 1400 # PICK UP 2 DATA WORDS
042753,000307: 05,3701 0340 EBANK= DNTMBUFF
042754,000308: 05,3701 13716 TCF DNTMEXIT # NOW GO SEND THEM.
042755,000309:
042756,000310: 05,3702 54337 DOSUBLST TS SUBLIST # SET SUBLIST POINTER
042757,000311: 05,3703 50337 NEXTINSL INDEX SUBLIST
042758,000312: 05,3704 00000 0 0 # = CA SSSS (SSSS = NEXT ENTRY IN SUBLIST)
042759,000313: 05,3705 10000 CCS A # IS IT THE END OF THE SUBLIST
042760,000314: 05,3706 24337 INCR SUBLIST # NO-
042761,000315: 05,3707 13713 TCF +4
042762,000316: 05,3710 54337 TS SUBLIST # SAVE A.
042763,000317: 05,3711 37752 CA NEGONE # SET SUBLIST TO MINUS
042764,000318: 05,3712 56337 XCH SUBLIST # RETRIEVE A.
042765,000319: 05,3713 24000 +4 INCR A
042766,000320: 05,3714 54336 TS DNECADR # SAVE DNADR
042767,000321: 05,3715 13574 TCF SETWO +2 # GO USE COMMON CODING(PROBLEMS WOULD
042768,000322: # OCCUR IF THE PROGRAM ENCOUNTERED A
042769,000323: # DNPTR NOW)
042770,000324:
042771,000325: 05,3716 00006 DNTMEXIT EXTEND # DOWN-TELEMETRY EXIT
042772,000326: 05,3717 01034 WRITE DNTM1 # TO SEND A + L TO CHANNELS 34 + 35
042773,000327: 05,3720 30001 CA L # RESPECTIVELY
042774,000328: 05,3721 00006 TMEXITL EXTEND
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Page 986
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042776,000330: 05,3722 01035 WRITE DNTM2
042777,000331: 05,3723 15301 TMRESUME TCF RESUME # EXIT TELEMETRY PROGRAM VIA RESUME.
042778,000332:
042779,000333: 05,3724 7744 MINB12 EQUALS -1/8
042780,000334: 05,3724 0336 DNECADR EQUALS TMINDEX
042781,000335: 05,3724 0334 CTLIST EQUALS LDATALST
042782,000336: 05,3724 0337 SUBLIST EQUALS DNQ
042783,000337:
042784,000338: # MOD BY - DENSMORE - JUNE 1969 - ELIMINATE ERASABLE DUMP COUNT
042785,000339:
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Page 987
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042787,000341: # SUBROUTINE NAME- DNDUMP
042788,000342: # FUNCTIONAL DESCRIPTION - TO SEND (DUMP) ALL 8 BANKS OF ERASABLE STORAGE TWICE. BANKS ARE SENT ONE AT A TIME
042789,000343: # EACH BANK IS PRECEEDED BY AN ID WORD, SYNCH BITS, ECADR AND TIME1 FOLLOWED BY THE 256D WORDS OF EACH
042790,000344: # EBANK. EBANKS ARE DUMPED IN ORDER(I.E. EBANK 0 FIRST, THEN EBANK1 ETC.)
042791,000345: # CALLING SEQUENCE- THE GROUND OR ASTRONAUT BY KEYING V74E CAN INITIALIZE THE DUMP.
042792,000346: # AFTER KEYING IN V74E THE CURRENT DOWNLIST WILL BE IMMEDIATELY TERMINATED AND THE DOWNLINK ERASABLE DUMP
042793,000347: # WILL BEGIN.
042794,000348: # ONCE INITIATED THE DOWNLINK ERASABLE DUMP CAN BE TERMINATED (AND INTERRUPTED DOWNLIST REINSTATED) ONLY
042795,000349: # BY THE FOLLOWING:
042796,000350: # 1. A FRESH START
042797,000351: # 2. COMPLETION OF BOTH COMPLETE DUMPS
042798,000352: # 3. AND INVOLUNTARILY BY A RESTART.
042799,000353: # NORMAL EXIT MODE- TCF DNPHASE1
042800,000354: # ALARM OR ABORT MODE- NONE
042801,000355: # *SUBROUTINES CALLED- NONE.
042802,000356: # ERASABLE INITIALIZATION REQUIRED-
042803,000357: # NONE
042804,000358: # DEBRIS- DUMPLOC, DUMPSW, DNTMGOTO, EBANK AND CENTRAL REGISTERS
042805,000359: # TIMING- TIME(IN SECS) = ((NO.DUMPS)*(NO.EBANKS)* (WDSPEREBANK + NO.IDWDS)) / NO.WDSPERSEC
042806,000360: # TIME(IN SECS) = ( 4 )*( 8 )* ( 256 + 4 ) / 100
042807,000361: # THUS TIME(IN SECS TO SEND DUMP OF ERASABLE 4 TIMES VIA DOWNLINK) = 83.2 SECONDS
042808,000362:
042809,000363: # STRUCTURE OF ONE EBANK AS IT IS SENT BY DOWNLINK PROGRAM-
042810,000364: # (REMINDER-THIS ONLY DESCRIBES ONE OF THE 8 EBANKS X 4 (DUMPS) = 32 EBANKS WHICH WILL BE SENT BY DNDUMP)
042811,000365: # DOWNLIST W
042812,000366: # WORD TAKEN FROM CONTENTS OF EXAMPLE O COMMENTS
042813,000367:
042814,000368: # 1 ERASID 0177X 0 DOWNLIST I.D. FOR DOWNLINK ERASABLE DUMP (X=7 CSM, 6 LM)
042815,000369: # 2 LOWIDCOD 77340 1 DOWNLINK SYNCH BITS.(SAME ONE USED IN ALL OTHER DOWNLISTS)
042816,000370: # 3 DUMPLOC 13400 1 (SEE NOTES ON DUMPLOC)1= 3RD ERAS DUMP, 3400=ECADR OF 5TH WD
042817,000371: # 4 TIME1 14120 1 TIME IN CENTISECONDS
042818,000372: # 5 FIRST WORD OF EBANK X 03400 1 IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1400 (ECADR 3400)
042819,000373: # 6 2ND WORD OF EBANK X 00142 1 IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1401 (ECADR 3401)
042820,000374: # 7 3RD WORD OF EBANK X 00142 1 IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1402 (ECADR 3402)
042821,000375: # . 1
042822,000376: # . 1
042823,000377: # . 1
042824,000378: # 260D 256TH WORD OF EBANK X 03777 1 IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1777 (ECADR 3777)
042825,000379:
042826,000380: # NOTE- DUMPLOC CONTAINS THE COUNTER AND ECADR FOR EACH WORD BEING SENT.
042827,000381: # THE BIT STRUCTURE OF DUMPLOC IS FOLLOWS---
042828,000382: # X = NOT USED
042829,000383: # X ABC EEE RRRRRRRR ABC = ERASABLE DUMP COUNTER(I.E. ABC = 0,1,2 OR 3 WHICH MEANS THAT
042830,000384: # COMPLETE ERASABLE DUMP NUMBER 1,2,3 OR 4 RESPECTIVELY IS IN PROGRESS)
042831,000385: # EEE = EBANK BITS
042832,000386: # RRRRRRRR = RELATIVE ADDRESS WITHIN AN EBANK.
042833,000387:
042834,000388: 05,3724 34755 DNDUMPI CA ZERO # INITIALIZE DOWNLINK
042835,000389: 05,3725 54336 TS DUMPLOC # ERASABLE DUMP
042836,000390: 05,3726 03767 +2 TC SENDID # GO SEND ID AND SYNCH BITS
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042838,000392: 05,3727 33736 CA LDNDUMP1 # SET DNTMGOTO
042839,000393: 05,3730 54335 TS DNTMGOTO # TO LOCATION FOR NEXT PASS
042840,000394: 05,3731 30025 CA TIME1 # PLACE TIME1
042841,000395: 05,3732 56001 XCH L # INTO L
042842,000396: 05,3733 30336 CA DUMPLOC # AND ECADR OF THIS EBANK INTO A
042843,000397: 05,3734 13716 TCF DNTMEXIT # SEND DUMPLOC AND TIME1
042844,000398:
042845,000399: 05,3735 03737 LDNDUMP ADRES DNDUMP
042846,000400: 05,3736 03751 LDNDUMP1 ADRES DNDUMP1
042847,000401:
042848,000402: 05,3737 34752 DNDUMP CA TWO # INCREMENT ECADR IN DUMPLOC
042849,000403: 05,3740 26336 ADS DUMPLOC # TO NEXT DP WORD TO BE
042850,000404: 05,3741 74357 MASK LOW8 # DUMPED AND SAVE IT.
042851,000405: 05,3742 10000 CCS A # IS THIS THE BEGINNING OF A NEW EBANK
042852,000406: 05,3743 13753 TCF DNDUMP2 # NO- THEN CONTINUE DUMPING
042853,000407: 05,3744 30336 CA DUMPLOC # YES- IS THIS THE END OF THE
042854,000408: 05,3745 74737 MASK BIT13 # SECOND COMPLETE ERASABLE DUMP?
042855,000409: 05,3746 00006 EXTEND
042856,000410: 05,3747 13726 BZF DNDUMPI +2 # NO - GO BACK AND INITIALIZE NEXT BANK
042857,000411: 05,3750 13525 TCF DNPHASE1 # YES - SEND DOWNLIST AGAIN
042858,000412: 05,3751 33735 DNDUMP1 CA LDNDUMP # SET DNTMGOTO
042859,000413: 05,3752 54335 TS DNTMGOTO # FOR WORDS 3 TO 256D OF CURRENT EBANK
042860,000414:
042861,000415: 05,3753 30336 DNDUMP2 CA DUMPLOC
042862,000416: 05,3754 54003 TS EBANK # SET EBANK
042863,000417: 05,3755 74357 MASK LOW8 # ISOLATE RELATIVE ADDRESS.
042864,000418: 05,3756 54002 TS Q # (NOTE: MASK INSTRUCTION IS USED TO PICK
042865,000419: 05,3757 34754 CA NEG0 # UP ERASABLE REGISTERS SO THAT EDITING
042866,000420: 05,3760 54001 TS L # REGISTERS 20-23 WILL NOT BE ALTERED.)
042867,000421: 05,3761 50002 INDEX Q
042868,000422: 05,3762 E3,1400 EBANK= 1400 # PICK UP LOW ORDER REGISTER OF PAIR
042869,000423: 05,3762 71401 MASK 1401 # OF ERASABLE REGISTERS.
042870,000424: 05,3763 56001 XCH L
042871,000425: 05,3764 50002 INDEX Q # PICK UP HIGH ORDER REGISTER OF PAIR
042872,000426: 05,3765 71400 MASK 1400 # OF ERASABLE REGISTERS.
042873,000427: 05,3766 0340 EBANK= DNTMBUFF
042874,000428: 05,3766 13716 TCF DNTMEXIT # GO SEND THEM
042875,000429:
042876,000430:
042877,000431: 05,3767 00006 SENDID EXTEND # **ENTRANCE USED BY ERASABLE DUMP PROG.**
042878,000432: 05,3770 22335 QXCH DNTMGOTO # SET DNTMGOTO SO NEXT TIME PROG WILL GO
042879,000433: 05,3771 35011 CAF ERASID # TO LOCATION FOLLOWING :TC SENDID:
042880,000434:
042881,000435: 05,3772 54001 TS L # **ENTRANCE USED BY REGULAR DOWNLINK PG**
042882,000436: 05,3773 03615 TC WOZERO # GO SET WORD ORDER CODE TO ZERO
042883,000437: 05,3774 32065 CAF LOWIDCOD # PLACE SPECIAL ID CODE INTO L
042884,000438: 05,3775 56001 XCH L # AND ID BACK INTO A
042885,000439: 05,3776 13716 TCF DNTMEXIT # SEND DOWNLIST ID CODE(S).
End of include-file DOWN-TELEMETRY_PROGRAM.agc. Parent file is MAIN.agc