ASSEMBLE REVISION 249 OF AGC PROGRAM COLOSSUS BY NASA 2021111-041 20'35 OCT. 28,1968Note that the date is the date of the printout, not the date of the program revision.
Source Code
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This is the source-code for the Apollo 9 Command Module's Guidance Computer.
These files were derived originally from the scan from MIT's Dibner Institute's
now-discontinued website titled "History of Recent Science and Technology", which
in turn was originally created by Gary Neff, though his high-quality scans were
unfortunately reduced in legibility when presented online.
The markings on the front of the
printout imply that it was the original AGC developer Norm Brodeur's copy.
A scan by Ron Burkey has superceded it, made from a more-legible copy from the collection of original
AGC developer Fred Martin. The source code was transcribed from
those images by Ron Burkey. Note that the page images
presented online are of reduced quality, and that higher-quality images
are available. Report any conversion errors or legibility
problems in page images to info@sandroid.org.
Notations on the program listing read, in part:ASSEMBLE REVISION 249 OF AGC PROGRAM COLOSSUS BY NASA 2021111-041 20'35 OCT. 28,1968Note that the date is the date of the printout, not the date of the program revision. |
047402,000002: ## Copyright: Public domain.
047403,000003: ## Filename: DOWN_TELEMETRY_PROGRAM.agc
047404,000004: ## Purpose: Part of the source code for Colossus, build 249.
047405,000005: ## It is part of the source code for the Command Module's (CM)
047406,000006: ## Apollo Guidance Computer (AGC), for Apollo 9.
047407,000007: ## Assembler: yaYUL
047408,000008: ## Reference: Starts on p. 1063.
047409,000009: ## Contact: Ron Burkey <info@sandroid.org>.
047410,000010: ## Website: www.ibiblio.org/apollo.
047411,000011: ## Mod history: 08/28/04 RSB. Adapted from corresponding Luminary 131 file.
047412,000012: ## 2010-10-24 JL Indentation fixes.
047413,000013: ## 2017-01-06 RSB Page numbers now agree with those on the
047414,000014: ## original harcopy, as opposed to the PDF page
047415,000015: ## numbers in 1701.pdf.
047416,000016: ## 2017-01-07 RSB Cross-diff'd comment text (not whitespace)
047417,000017: ## vs the already-proofed corresponding Colossus
047418,000018: ## 237 and Comanche 55 source-code files
047419,000019: ## and corrected errors found.
047420,000020: ## 2017-03-15 RSB Comment-text fixes identified in 5-way
047421,000021: ## side-by-side diff of Luminary 69/99/116/131/210.
047422,000022:
047423,000023: ## The contents of the "Colossus249" files, in general, are transcribed
047424,000024: ## from a scanned copy of the program listing. Notations on this
047425,000025: ## document read, in part:
047426,000026: ##
047427,000027: ## Assemble revision 249 of AGC program Colossus by NASA
047428,000028: ## 2021111-041. October 28, 1968.
047429,000029: ##
047430,000030: ## This AGC program shall also be referred to as
047431,000031: ## Colossus 1A
047432,000032: ##
047433,000033: ## Prepared by
047434,000034: ## Massachusetts Institute of Technology
047435,000035: ## 75 Cambridge Parkway
047436,000036: ## Cambridge, Massachusetts
047437,000037: ## under NASA contract NAS 9-4065.
047438,000038: ##
047439,000039: ## Refer directly to the online document mentioned above for further information.
047440,000040: ## Please report any errors (relative to the scanned pages) to info@sandroid.org.
047441,000041: ##
047442,000042: ## In some cases, where the source code for Luminary 131 overlaps that of
047443,000043: ## Colossus 249, this code is instead copied from the corresponding Luminary 131
047444,000044: ## source file, and then is proofed to incorporate any changes.
047445,000045:
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Page 1063 |
047447,000047: # PROGRAM NAME- DOWN TELEMETRY PROGRAM
047448,000048: # MOD NO.- 0 TO COMPLETELY REWRITE THE DOWN TELEMETRY PROGRAM AND DOWNLINK ERASABLE DUMP PROGRAM FOR THE
047449,000049: # PURPOSE OF SAVING APPROXIMATELY 150 WORDS OF CORE STORAGE.
047450,000050: # THIS CHANGE REQUIRES AN ENTIRELY NEW METHOD OF SPECIFYING DOWNLINK LISTS. REFER TO DOWNLINK
047451,000051: # LISTS LOG SECTION FOR MORE DETAILS. HOWEVER THIS CHANGE WILL NOT AFFECT THE GROUND PROCESSING
047452,000052: # OF DOWN TELEMETRY DATA.
047453,000053: # MOD BY- KILROY, SMITH, DEWITT
047454,000054: # DATE- 02 OCT 67
047455,000055: # AUTHORS- KILROY, SMITH, DEWITT, DEWOLF, FAGIN
047456,000056: # LOG SECTION- DOWN-TELEMETRY PROGRAM
047457,000057:
047458,000058: # FUNCTIONAL DESCRIPTION- THIS ROUTINE IS INITIATED BY TELEMETRY END
047459,000059: # PULSE FROM THE DOWNLINK TELEMETRY CONVERTER. THIS PULSE OCCURS
047460,000060: # AT 50 TIMES PER SEC (EVERY 20 MS) THEREFORE DODOWNTM IS
047461,000061: # EXECUTED AT THESE RATES. THIS ROUTINE SELECTS THE APPROPRIATE
047462,000062: # AGC DATA TO BE TRANSMITTED DOWNLINK AND LOADS IT INTO OUTPUT
047463,000063: # CHANNELS 34 AND 35. THE INFORMATION IS THEN GATED OUT FROM THE
047464,000064: # LGC IN SERIAL FASHION.
047465,000065:
047466,000066: # THIS PROGRAM IS CODED FOR A 2 SECOND DOWNLIST. SINCE DOWNRUPTS
047467,000067: # OCCUR EVERY 20 MS AND 2 AGC COMPUTER WORDS CAN BE PLACED IN
047468,000068: # CHANNELS 34 AND 35 DURING EACH DOWNRUPT THE PROGRAM IS CAPABLE
047469,000069: # OF SENDING 200 AGC WORDS EVERY 2 SECONDS.
047470,000070:
047471,000071: # CALLING SEQUENCE- NONE
047472,000072: # PROGRAM IS ENTERED VIA TCF DODOWNTM WHICH IS EXECUTED AS A
047473,000073: # RESULT OF A DOWNRUPT. CONTROL IS RETURNED VIA TCF RESUME WHICH
047474,000074: # IN EFFECT IS A RESUME.
047475,000075:
047476,000076: # SUBROUTINES CALLED- NONE
047477,000077:
047478,000078: # NORMAL EXIT MODE- TCF RESUME
047479,000079:
047480,000080: # ALARM OR ABORT EXIT MODE- NONE
047481,000081:
047482,000082: # RESTART PROTECTION:
047483,000083: # ON A FRESH START AND RESTART THE 'STARTSUB' SUBROUTINE WILL INITIALIZE THE DOWNLIST POINTER (ACTUALLY
047484,000084: # DNTMGOTO) TO THE BEGINNING OF THE CURRENT DOWNLIST (I.E. CURRENT CONTENTS OF DNLSTADR). THIS HAS THE
047485,000085: # EFFECT OF IGNORING THE REMAINDER OF THE DOWNLIST WHICH THE DOWN-TELEMETRY PROGRAM WAS WORKING ON WHEN
047486,000086: # THE RESTART (OR FRESH START) OCCURRED AND RESUME DOWN TELEMETRY FROM THE BEGINNING OF THE CURRENT
047487,000087: # DOWNLIST.
047488,000088:
047489,000089: # ALSO OF INTEREST IS THE FACT THAT ON A RESTART THE AGC WILL ZERO DOWNLINK CHANNELS 13, 34 AND 35.
047490,000090:
047491,000091: # DOWNLINK LIST SELECTION:
047492,000092: # THE APPROPRIATE DOWNLINK LISTS ARE SELECTED BY THE FOLLOWING:
047493,000093: # 1. FRESH START
047494,000094: # 2. V37EXXE WHERE XX = THE MAJOR MODE BEING SELECTED.
047495,000095: # 3. UPDATE PROGRAM (P27)
047496,000096: # 4. NON-V37 SELECTABLE TYPE PROGRAMS (E.G. AGS INITIALIZATION (SUNDANCE, LUMINARY) AND P61-P62
047497,000097: # TRANSITION (COLOSSUS) ETC.).
047498,000098:
047499,000099: # DOWNLINK LIST RULES AND LIMITATIONS:
047500,000100: # READ SECTION(S) WHICH FOLLOW 'DEBRIS' WRITEUP.
047501,000101:
047502,000102: # OUTPUT- EVERY 2 SECONDS 100 DOUBLE PRECISION WORDS (I.E. 200 LGC
047503,000103: # COMPUTER WORDS) ARE TRANSMITTED VIA DOWNLINK.
047504,000104:
047505,000105: # ERASABLE INITIALIZATION REQUIRED- NONE
047506,000106: # 'DNTMGOTO' AND 'DNLSTADR' ARE INITIALIZED BY THE FRESH START PROGRAM.
047507,000107:
047508,000108: # DEBRIS (ERASABLE LOCATIONS DESTROYED BY THIS PROGRAM)-
047509,000109: # LDATALST, DNTMBUFF TO DNTMBUFF +21D, TMINDEX, DNQ.
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Page 1064 No source on this page of the original assembly listing. |
047512,000112:
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Page 1065 |
047514,000114: # DODOWNTM IS ENTERED EVERY 20 MS BY AN INTERRUPT TRIGGERED BY THE
047515,000115: # RECEIPT OF AN ENDPULSE FROM THE SPACECRAFT TELEMETRY PROGRAMMER.
047516,000116:
047517,000117: # NOTES REGARDING DOWNLINK LISTS ASSOCIATED WITH THIS PROGRAM:
047518,000118: # 1. DOWNLISTS. - DOWNLISTS MUST BE COMPILED IN THE SAME BANK AS THE
047519,000119: # DOWN-TELEMETRY PROGRAM. THIS IS DONE FOR EASE OF CODING, FASTER
047520,000120: # EXECUTION.
047521,000121: # 2. EACH DOWNLINK LIST CONSISTS OF A CONTROL LIST AND A NUMBER OF
047522,000122: # SUBLISTS.
047523,000123: # 3. A SUBLIST REFERS TO A SNAPSHOT OR DATA COMMON TO THE SAME OR OTHER
047524,000124: # DOWNLINK LISTS. ANY SUBLIST CONTAINING COMMON DATA NEEDS TO BE
047525,000125: # CODED ONLY ONCE FOR THE APPLICABLE DOWNLINK LISTS.
047526,000126: # 4. SNAPSHOT SUBLISTS REFER SPECIFICALLY TO HOMOGENOUS DATA WHICH MUST BE
047527,000127: # SAVED IN A BUFFER DURING ONE DOWNRUPT.
047528,000128: # 5. THE 1DNADR FOR THE 1ST WORD OF SNAPSHOT DATA IS FOUND AT THE END
047529,000129: # OF EACH SNAPSHOT SUBLIST, SINCE THE PROGRAM CODING SENDS THIS DP WORD
047530,000130: # IMMEDIATELY AFTER STORING THE OTHERS IN THE SNAPSHOT BUFFER.
047531,000131: # 6. ALL LISTS ARE COMBINATIONS OF CODED ERASABLE ADDRESS CONSTANTS
047532,000132: # CREATED FOR THE DOWNLIST PROGRAM.
047533,000133: # A. 1DNADR 1-WORD DOWNLIST ADDRESS.
047534,000134: # SAME AS ECADR, BUT USED WHEN THE WORD ADDRESSED IS THE LEFT
047535,000135: # HALF OF A DOUBLE-PRECISION WORD FOR DOWN TELEMETRY.
047536,000136: # B. 2DNADR - 6DNADR N-WORD DOWNLIST ADDRESS, N = 2 - 6.
047537,000137: # SAME AS 1DNADR, BUT WITH THE 4 UNUSED BITS OF THE ECADR FORMAT
047538,000138: # FILLED IN WITH 0001-0101. USED TO POINT TO A LIST OF N DOUBLE-
047539,000139: # PRECISION WORDS, STORED CONSECUTIVELY, FOR DOWN TELEMETRY.
047540,000140: # C. DNCHAN DOWNLIST CHANNEL ADDRESS.
047541,000141: # SAME AS 1DNADR, BUT WITH PREFIX BITS 0111. USED TO POINT TO
047542,000142: # A PAIR OF CHANNELS FOR DOWN TELEMETRY.
047543,000143: # D. DNPTR DOWN TELEMETRY SUBLIST POINTER.
047544,000144: # SAME AS CAF BUT TAGGED AS A CONSTANT. USED IN CONTROL LIST TO POINT TO A SUBLIST.
047545,000145: # CAUTION --- A DNPTR CANNOT BE USED IN A SUBLIST.
047546,000146: # 7. THE WORD ORDER CODE IS SET TO ZERO AT THE BEGINNING OF EACH DOWNLIST (I.E. CONTROL LIST) AND WHEN
047547,000147: # A '1DNADR TIME2' IS DETECTED IN THE CONTROL LIST (ONLY).
047548,000148: # 8. IN THE SNAPSHOT SUBLIST ONLY, THE DNADR'S CANNOT POINT TO THE FIRST WORD OF ANY EBANK.
047549,000149:
047550,000150: # DOWNLINK LIST RESTRICTIONS:
047551,000151: # (THE FOLLOWING POINTS MAY BE LISTED ELSEWHERE BUT ARE LISTED HERE SO IT IS CLEAR THAT THESE THINGS CANNOT BE
047552,000152: # DONE)
047553,000153: # 1. SNAPSHOT DOWNLIST:
047554,000154: # (A) CANNOT CONTAIN THE FOLLOWING ECADRS (I.E. 1DNADR'S): 0, 400, 1000, 1400, 2000, 2400, 3000, 3400.
047555,000155: # (B) CAN CONTAIN ONLY 1DNADR'S
047556,000156: # 2. ALL DOWNLINKED DATA (EXCEPT CHANNELS) IS PICKED UP BY A <DCA<SO DOWNLINK LISTS CANNOT CONTAIN THE
047557,000157: # EQUIVALENT OF THE FOLLOWING ECADRS (I.E. IDNADRS): 377, 777, 1377, 1777, 2377, 27777, 3377, 3777.
047558,000158: # (NOTE: THE TERM EQUIVALENT ' MEANT THAT THE IDNADR TO 6DNADR WILL BE PROCESSED LIKE 1 TO 6 ECADRS)
047559,000159: # 3. CONTROL LISTS AND SUBLISTS CANNOT HAVE ENTRIES = OCTAL 00000 OR OCTAL 77777
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Page 1066 |
047561,000161: # 4. THE '1DNADR TIME2' WHICH WILL CAUSE THE DOWNLINK PROGRAM TO SET THE WORDER CODE TO 3 MUST APPEAR IN THE
047562,000162: # CONTROL SECTION OF THE DOWNLIST.
047563,000163: # 5. 'DNCHAN 0' CANNOT BE USED.
047564,000164: # 6. 'DNPTR 0' CANNOT BE USED.
047565,000165: # 7. DNPTR CANNOT APPEAR IN A SUBLIST.
047566,000166:
047567,000167: # EBANK SETTINGS
047568,000168: # IN THE PROCESS OF SETTING THE EBANK (WHEN PICKING UP DOWNLINK DATA) THE DOWN TELEMETRY PROGRAM PUTS
047569,000169: # 'GARBAGE' INTO BITS15-12 OF EBANK. HUGH BLAIR-SMITH WARNS US THAT BITS15-12 OF EBANK MAY BECOME
047570,000170: # SIGNIFICANT SOMEDAY IN THE FUTURE. IF/WHEN THAT HAPPENS, THE PROGRAM SHOULD INSURE (BY MASKING ETC.)
047571,000171: # THAT BITS 15-12 OF EBANK ARE ZERO.
047572,000172:
047573,000173: # INITIALIZATION REQUIRED- TO INTERRUPT CURRENT LIST AND START A NEW ONE..
047574,000174: # 1. ADRES OF DOWNLINK LIST INTO DNLSTADR
047575,000175: # 2. NEGONE INTO SUBLIST
047576,000176: # 3. NEGONE INTO DNECADR
047577,000177:
047578,000178: 22,3505 BANK 22
047579,000179: 05,2000 SETLOC DOWNTELM
047580,000180: 05,2000 BANK
047581,000181:
047582,000182: 05,3342 0340 EBANK= DNTMBUFF
047583,000183:
047584,000184: 05,3342 COUNT 05/DPROG
047585,000185:
047586,000186: 05,3342 54016 DODOWNTM TS BANKRUPT
047587,000187: 05,3343 00006 EXTEND
047588,000188: 05,3344 22012 QXCH QRUPT # SAVE Q
047589,000189: 05,3345 34704 CA BIT7 # SET WORD ORDER CODE TO 1. EXCEPTION- AT
047590,000190: 05,3346 00006 EXTEND # THE BEGINNING OF EACH LIST THE WORD
047591,000191: 05,3347 05013 WOR CHAN13 # CODE WILL BE SET BACK TO 0.
047592,000192: 05,3350 00335 TC DNTMGOTO # GOTO APPROPRIATE PHASE OF PROGRAM
047593,000193:
047594,000194: 05,3351 37716 DNPHASE1 CA NEGONE # INITIALIZE ALL CONTROL WORDS
047595,000195: 05,3352 54337 TS SUBLIST # WORDS TO MINUS ONE
047596,000196: 05,3353 54336 TS DNECADR
047597,000197: 05,3354 33474 CA LDNPHAS2 # SET DNTMGOTO =O ALL SUBSEQUENT DOWNRUPTS
047598,000198: 05,3355 54335 TS DNTMGOTO # GO TO DNPHASE2
047599,000199: 05,3356 13372 TCF NEWLIST
047600,000200: 05,3357 10336 DNPHASE2 CCS DNECADR # SENDING OF DATA IN PROGRESS
047601,000201: 05,3360 03507 DODNADR TC FETCH2WD # YES - THEN FETCH THE NEXT 2 SP WORDS
047602,000202: 05,3361 77753 MINTIME2 -1DNADR TIME2 # NEGATIVE OF TIME2 1DNADR
047603,000203: 05,3362 13363 TCF +1 # (ECADR OF 3776 + 74001 = 77777)
047604,000204:
047605,000205: 05,3363 10337 CCS SUBLIST # IS THE SUBLIST IN CONTROL
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Page 1067 |
047607,000207: 05,3364 13522 TCF NEXTINSL # YES
047608,000208: 05,3365 74001 DNADRDCR OCT 74001 # DNADR COUNT AND ECADR DECREMENTER
047609,000209:
047610,000210: 05,3366 30334 CHKLIST CA CTLIST
047611,000211: 05,3367 00006 EXTEND
047612,000212: 05,3370 63372 BZMF NEWLIST # IT WILL BE NEGATIVE AT END OF LIST
047613,000213: 05,3371 13377 TCF NEXTINCL
047614,000214: 05,3372 50332 NEWLIST INDEX DNLSTCOD
047615,000215: 05,3373 32342 CA DNTABLE # INITIALIZE CTLIST WITH
047616,000216: 05,3374 54334 TS CTLIST # STARTING ADDRESS OF NEW LIST
047617,000217: 05,3375 40332 CS DNLSTCOD
047618,000218: 05,3376 13612 TCF SENDID +3
047619,000219: 05,3377 50334 NEXTINCL INDEX CTLIST
047620,000220: 05,3400 30000 CA 0
047621,000221: 05,3401 10000 CCS A
047622,000222: 05,3402 24334 INCR CTLIST # SET POINTER TO PICK UP NEXT CTLIST WORD
047623,000223: 05,3403 13407 TCF +4 # ON NEXT ENTRY TO PROG. (A SHOULD NOT =0)
047624,000224: 05,3404 56334 XCH CTLIST # SET CTLIST TO NEGATIVE AND PLACE(CODING)
047625,000225: 05,3405 40000 COM # UNCOMPLEMENTED DNADR INTO A. (FOR LA)
047626,000226: 05,3406 56334 XCH CTLIST # (ST IN )
047627,000227: 05,3407 24000 +4 INCR A # (CTLIST)
047628,000228: 05,3410 54336 TS DNECADR # SAVE DNADR
047629,000229: 05,3411 63361 AD MINTIME2 # TEST FOR TIME2 (NEG. OF ECADR)
047630,000230: 05,3412 10000 CCS A
047631,000231: 05,3413 13417 TCF SETWO +1 # DON'T SET WORD ORDER CODE
047632,000232: 05,3414 47777 MINB1314 OCT 47777 # MINUS BIT 13 AND 14 (CAN'T GET HERE)
047633,000233: 05,3415 13417 TCF SETWO +1 # DON'T SET WORD ORDER CODE
047634,000234: 05,3416 03441 SETWO TC WOZERO # GO SET WORD ORDER CODE TO ZERO.
047635,000235: 05,3417 30336 +1 CA DNECADR # RELOAD A WITH THE DNADR.
047636,000236: 05,3420 63414 +2 AD MINB1314 # IS THIS A REGULAR DNADR?
047637,000237: 05,3421 00006 EXTEND
047638,000238: 05,3422 63507 BZMF FETCH2WD # YES. (A MUST NEVER BE ZERO)
047639,000239: 05,3423 67710 AD MINB12 # NO- IS IT A POINTER (DNPTR) OR A
047640,000240: 05,3424 00006 EXTEND # CHANNEL(DNCHAN)
047641,000241: 05,3425 63445 BZMF DODNPTR # IT'S A POINTER. (A MUST NEVER BE ZERO)
047642,000242:
047643,000243: 05,3426 00006 DODNCHAN TC 6 # (EXECUTED AS EXTEND) IT S A CHANNEL
047644,000244: 05,3427 50336 INDEX DNECADR
047645,000245: 05,3430 44000 INDEX 0 -4000 # (EXECUTED AS READ)
047646,000246: 05,3431 54001 TS L
047647,000247: 05,3432 00006 TC 6 # (EXECUTED AS EXTEND)
047648,000248: 05,3433 50336 INDEX DNECADR
047649,000249: 05,3434 43777 INDEX 0 -4001 # (EXECUTED AS READ)
047650,000250: 05,3435 54336 TS DNECADR # SET DNECADR
047651,000251: 05,3436 37716 CA NEGONE # TO MINUS
047652,000252: 05,3437 56336 XCH DNECADR # WHILE PRESERVING A.
047653,000253: 05,3440 13535 TCF DNTMEXIT # GO SEND CHANNELS
047654,000254:
047655,000255: 05,3441 44704 WOZERO CS BIT7
047656,000256: 05,3442 00006 EXTEND
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Page 1068 |
047658,000258: 05,3443 03013 WAND CHAN13 # SET WORD ORDER CODE TO ZERO
047659,000259: 05,3444 00002 TC Q # RETURN TO CALLER
047660,000260:
047661,000261: 05,3445 50336 DODNPTR INDEX DNECADR # DNECADR CONTAINS ADRES OF SUBLIST
047662,000262: 05,3446 00000 0 0 # CLEAR AND ADD LIST ENTRY INTO A.
047663,000263: 05,3447 10000 CCS A # IS THIS A SNAPSHOT SUBLIST
047664,000264: 05,3450 30336 CA DNECADR # NO, IT IS A REGULAR SUBLIST.
047665,000265: 05,3451 13521 TCF DOSUBLST # A MUST NOT BE ZERO.
047666,000266:
047667,000267: 05,3452 56336 XCH DNECADR # YES, IT IS A SNAPSHOT SUBLIST.
047668,000268: 05,3453 54337 TS SUBLIST # C(DNECADR) INTO SUBLIST
047669,000269: 05,3454 34714 CAF ZERO # A INTO A
047670,000270: 05,3455 56336 XCH TMINDEX # (NOTE.. TMINDEX = DNECADR)
047671,000271:
047672,000272: # THE FOLLOWING CODING (FROM SNAPLOOP TO SNAPEND) IS FOR THE PURPOSE OF TAKING A SNAPSHOT OF 12 DP REGISTERS.
047673,000273: # THIS IS DONE BY SAVING 11 DP REGISTERS IN DNTMBUFF AND SENDING THE FIRST DP WORD IMMEDIATELY.
047674,000274: # THE SNAPSHOT PROCESSING IS THE MOST TIME CONSUMING AND THEREFORE THE CODING AND LIST STRUCTURE WERE DESIGNED
047675,000275: # TO MINIMIZE TIME. THE TIME OPTIMIZATION RESULTS IN RULES UNIQUE TO THE SNAPSHOT PORTION OF THE DOWNLIST.
047676,000276: # THESE RULES ARE ......
047677,000277: # 1. ONLY 1DNADR'S CAN APPEAR IN THE SNAPSHOT SUBLIST
047678,000278: # 2. THE 1DNADR'S CANNOT REFER TO THE FIRST LOCATION IN ANY BANK.
047679,000279:
047680,000280: 05,3456 54003 SNAPLOOP TS EBANK # SET EBANK
047681,000281: 05,3457 74373 MASK LOW8 # ISOLATE RELATIVE ADDRESS
047682,000282: 05,3460 00006 EXTEND
047683,000283: 05,3461 50000 INDEX A
047684,000284: 05,3462 E3,1401 EBANK= 1401
047685,000285: 05,3462 31402 DCA 1401 # PICK UP 2 SNAPSHOT WORDS.
047686,000286: 05,3463 0340 EBANK= DNTMBUFF
047687,000287: 05,3463 50336 INDEX TMINDEX
047688,000288: 05,3464 52341 DXCH DNTMBUFF # STORE 2 SNAPSHOT WORDS IN BUFFER
047689,000289: 05,3465 24336 INCR TMINDEX # SET BUFFER INDEX FOR NEXT 2 WORDS.
047690,000290: 05,3466 24336 INCR TMINDEX
047691,000291: 05,3467 24337 SNAPAGN INCR SUBLIST # SET POINTER TO NEXT 2 WORDS OF SNAPSHOT
047692,000292: 05,3470 50337 INDEX SUBLIST
047693,000293: 05,3471 00000 0 0 # = CA SSSS (SSSS = NEXT ENTRY IN SUBLIST)
047694,000294: 05,3472 10000 CCS A # TEST FOR LAST TWO WORDS OF SNAPSHOT.
047695,000295: 05,3473 13456 TCF SNAPLOOP # NOT LAST TWO.
047696,000296: 05,3474 03357 LDNPHAS2 GENADR DNPHASE2
047697,000297: 05,3475 54337 TS SUBLIST # YES, LAST. SAVE A.
047698,000298: 05,3476 37716 CA NEGONE # SET DNECADR AND
047699,000299: 05,3477 54336 TS DNECADR # SUBLIST POINTERS
047700,000300: 05,3500 56337 XCH SUBLIST # TO NEGATIVE VALUES.
047701,000301: 05,3501 54003 TS EBANK
047702,000302: 05,3502 74373 MASK LOW8
047703,000303: 05,3503 00006 EXTEND
047704,000304: 05,3504 50000 INDEX A
047705,000305: 05,3505 E3,1401 EBANK= 1401
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Page 1069 |
047707,000307: 05,3505 31402 DCA 1401 # PICK UP FIRST 2 WORDS OF SNAPSHOT.
047708,000308: 05,3506 0340 EBANK= DNTMBUFF
047709,000309: 05,3506 13535 SNAPEND TCF DNTMEXIT # NOW GO SEND THEM.
047710,000310:
047711,000311: 05,3507 30336 FETCH2WD CA DNECADR
047712,000312: 05,3510 54003 TS EBANK # SET EBANK
047713,000313: 05,3511 74373 MASK LOW8 # ISOLATE RELATIVE ADDRESS
047714,000314: 05,3512 54001 TS L
047715,000315: 05,3513 33365 CA DNADRDCR # DECREMENT COUNT AND ECADR
047716,000316: 05,3514 26336 ADS DNECADR
047717,000317: 05,3515 00006 EXTEND
047718,000318: 05,3516 50001 INDEX L
047719,000319: 05,3517 E3,1400 EBANK= 1400
047720,000320: 05,3517 31401 DCA 1400 # PICK UP 2 DATA WORDS
047721,000321: 05,3520 0340 EBANK= DNTMBUFF
047722,000322: 05,3520 13535 TCF DNTMEXIT # NOW GO SEND THEM.
047723,000323:
047724,000324: 05,3521 54337 DOSUBLST TS SUBLIST # SET SUBLIST POINTER
047725,000325: 05,3522 50337 NEXTINSL INDEX SUBLIST
047726,000326: 05,3523 00000 0 0 # = CA SSSS (SSSS = NEXT ENTRY IN SUBLIST)
047727,000327: 05,3524 10000 CCS A # IS IT THE END OF THE SUBLIST
047728,000328: 05,3525 24337 INCR SUBLIST # NO-
047729,000329: 05,3526 13532 TCF +4
047730,000330: 05,3527 54337 TS SUBLIST # SAVE A.
047731,000331: 05,3530 37716 CA NEGONE # SET SUBLIST TO MINUS
047732,000332: 05,3531 56337 XCH SUBLIST # RETRIEVE A.
047733,000333: 05,3532 24000 +4 INCR A
047734,000334: 05,3533 54336 TS DNECADR # SAVE DNADR
047735,000335: 05,3534 13420 TCF SETWO +2 # GO USE COMMON CODING (PROBLEMS WOULD
047736,000336: # OCCUR IF THE PROGRAM ENCOUNTERED A
047737,000337: # DNPTR NOW)
047738,000338:
047739,000339: 05,3535 00006 DNTMEXIT EXTEND # DOWN-TELEMETRY EXIT
047740,000340: 05,3536 01034 WRITE DNTM1 # TO SEND A + L TO CHANNELS 34 + 35
047741,000341: 05,3537 30001 CA L # RESPECTIVELY
047742,000342: 05,3540 00006 TMEXITL EXTEND
047743,000343: 05,3541 01035 WRITE DNTM2
047744,000344: 05,3542 15222 TMRESUME TCF RESUME # EXIT TELEMETRY PROGRAM VIA RESUME.
047745,000345:
047746,000346: 05,3543 7710 MINB12 EQUALS -1/8
047747,000347: 05,3543 0336 DNECADR EQUALS TMINDEX
047748,000348: 05,3543 0334 CTLIST EQUALS LDATALST
047749,000349: 05,3543 0337 SUBLIST EQUALS DNQ
047750,000350:
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Page 1070 |
047752,000352: # SUBROUTINE NAME- DNDUMP
047753,000353:
047754,000354: # FUNCTIONAL DESCRIPTION - TO SEND(DUMP) ALL ERASABLE STORAGE 'N' TIMES.(N = 1 TO 4). BANKS ARE SENT ONE AT A TIME
047755,000355: # EACH BANK IS PRECEEDED BY AN ID WORD, SYNCH BITS, ECADR AND TIME1 FOLLOWED BY THE 256D WORDS OF EACH
047756,000356: # EBANK. EBANKS ARE DUMPED IN ORDER(I.E. EBANK 0 FIRST, THEN EBANK1 ETC.)
047757,000357:
047758,000358: # CALLING SEQUENCE- THE GROUND OR ASTRONAUT BY KEYING V74E CAN INITIALIZE THE DUMP.
047759,000359: # AFTER KEYING IN V74E THE CURRENT DOWNLIST WILL BE IMMEDIATELY TERMINATED AND THE DOWNLINK ERASABLE DUMP
047760,000360: # WILL BEGIN.
047761,000361:
047762,000362: # ONCE INITIATED THE DOWNLINK ERASABLE DUMP CAN BE TERMINATED (AND INTERRUPTED DOWNLIST REINSTATED) ONLY
047763,000363: # BY THE FOLLOWING:
047764,000364:
047765,000365: # 1. A FRESH START
047766,000366: # 2. COMPLETION OF ALL DOWNLINK DUMPS REQUESTED (ACCORDING TO BITS SET IN DUMPCNT). NOTE THAT DUMPCNT
047767,000367: # CAN BE ALTERED BY A V21N01.
047768,000368: # 3. AND INVOLUNTARILY BY A RESTART.
047769,000369:
047770,000370: # NORMAL EXIT MODE- TCF DNPHASE1
047771,000371:
047772,000372: # ALARM OR ABORT MODE- NONE
047773,000373:
047774,000374: # *SUBROUTINES CALLED- NONE.
047775,000375:
047776,000376: # ERASABLE INITIALIZATION REQUIRED-
047777,000377: # DUMPCNT OCT 20000 IF 4 COMPLETE ERASABLE DUMPS ARE DESIRED
047778,000378: # DUMPCNT OCT 10000 IF 2 COMPLETE ERASABLE DUMPS ARE DESIRED
047779,000379: # DUMPCNT OCT 04000 IF 1 COMPLETE ERASABLE DUMP IS DESIRED
047780,000380:
047781,000381: # DEBRIS- DUMPLOC, DUMPSW, DNTMGOTO, EBANK AND CENTRAL REGISTERS
047782,000382:
047783,000383: # TIMING- TIME (IN SECS) = ((NO.DUMPS)*(NO.EBANKS)*(WDSPEREBANK + NO.IDWDS)) / NO.WDSPERSEC
047784,000384: # TIME (IN SECS) = ( 4 )*( 8 )*( 256 + 4 ) / 100
047785,000385: # THUS TIME (IN SECS TO SEND DUMP OF ERASABLE 4 TIMES VIA DOWNLINK) = 83.2 SECONDS
047786,000386:
047787,000387: # STRUCTURE OF ONE EBANK AS IT IS SENT BY DOWNLINK PROGRAM-
047788,000388: # (REMINDER- THIS ONLY DESCRIBES ONE OF THE 8 EBANKS X 4 (DUMPS) = 32 EBANKS WHICH WILL BE SENT BY DNDUMP)
047789,000389:
047790,000390: # DOWNLIST W
047791,000391: # WORD TAKEN FROM CONTENTS OF EXAMPLE O COMMENTS
047792,000392: # 1 ERASID 0177X 0 DOWNLIST I.D. FOR DOWNLINK ERASABLE DUMP (X=7 CSM, 6 LM)
047793,000393: # 2 LOWIDCOD 77340 1 DOWNLINK SYNCH BITS. (SAME ONE USED IN ALL OTHER DOWNLISTS)
047794,000394: # 3 DUMPLOC 13400 1 (SEE NOTES ON DUMPLOC) 1 = 3RD ERAS DUMP, 3400=ECADR OF 5TH WD
047795,000395: # 4 TIME1 14120 1 TIME IN CENTISECONDS
047796,000396: # 5 FIRST WORD OF EBANK X 03400 1 IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1400 (ECADR 3400)
047797,000397: # 6 2ND WORD OF EBANK X 00142 1 IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1401 (ECADR 3401)
047798,000398: # 7 3RD WORD OF EBANK X 00142 1 IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1402 (ECADR 3402)
047799,000399: # . 1
047800,000400: # . 1
047801,000401: # . 1
047802,000402: # 260D 256TH WORD OF EBANK X 03777 1 IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1777 (ECADR 3777)
047803,000403:
047804,000404: # NOTE- DUMPLOC CONTAINS THE COUNTER AND ECADR FOR EACH WORD BEING SENT.
047805,000405: # THE BIT STRUCTURE OF DUMPLOC IS FOLLOWS---
047806,000406: # X = NOT USED
047807,000407: # X ABC EEE RRRRRRRR ABC = ERASABLE DUMP COUNTER (I.E. ABC = 0,1,2 OR 3 WHICH MEANS THAT
047808,000408: # COMPLETE ERASABLE DUMP NUMBER 1,2,3 OR 4 RESPECTIVELY IS IN PROGRESS)
047809,000409: # EEE = EBANK BITS
047810,000410: # RRRRRRRR = RELATIVE ADDRESS WITHIN AN EBANK.
047811,000411:
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Page 1071 |
047813,000413: 05,3543 34714 DNDUMPI CA ZERO # INITIALIZE DOWNLINK
047814,000414: 05,3544 54336 TS DUMPLOC # ERASABLE DUMP
047815,000415: 05,3545 03607 +2 TC SENDID # GO SEND ID AND SYNCH BITS
047816,000416: 05,3546 33555 CA LDNDUMP1 # SET DNTMGOTO
047817,000417: 05,3547 54335 TS DNTMGOTO # TO LOCATION FOR NEXT PASS
047818,000418: 05,3550 30025 CA TIME1 # PLACE TIME1
047819,000419: 05,3551 56001 XCH L # INTO L
047820,000420: 05,3552 30336 CA DUMPLOC # AND ECADR OF THIS EBANK INTO A
047821,000421: 05,3553 13535 TCF DNTMEXIT # SEND DUMPLOC AND TIME1
047822,000422:
047823,000423: 05,3554 03556 LDNDUMP ADRES DNDUMP
047824,000424: 05,3555 03571 LDNDUMP1 ADRES DNDUMP1
047825,000425:
047826,000426: 05,3556 34711 DNDUMP CA TWO # INCREMENT ECADR IN DUMPLOC
047827,000427: 05,3557 26336 ADS DUMPLOC # TO NEXT DP WORD TO BE
047828,000428: 05,3560 74373 MASK LOW8 # DUMPED AND SAVE IT.
047829,000429: 05,3561 10000 CCS A # IS THIS THE BEGINNING OF A NEW EBANK
047830,000430: 05,3562 13573 TCF DNDUMP2 # NO- THEN CONTINUE DUMPING
047831,000431: 05,3563 30336 CA DUMPLOC # YES- IS THIS THE END OF THE
047832,000432: 05,3564 70333 MASK DUMPCNT # N TH(N = 1 TO 4) COMPLETE ERASABLE
047833,000433: 05,3565 77671 MASK PRIO34 # DUMP(BIT14 FOR 4, BIT13 FOR 2 OR BIT12
047834,000434: 05,3566 10000 CCS A # FOR 1 COMPLETE ERASABLE DUMP(S)).
047835,000435: 05,3567 13351 TCF DNPHASE1 # YES- START SENDING INTERRUPTED DOWNLIST
047836,000436: # AGAIN
047837,000437: 05,3570 13545 TCF DNDUMPI +2 # NO- GO BACK AND INITIALIZE NEXT BANK
047838,000438:
047839,000439: 05,3571 33554 DNDUMP1 CA LDNDUMP # SET DNTMGOTO
047840,000440: 05,3572 54335 TS DNTMGOTO # FOR WORDS 3 TO 256D OF CURRENT EBANK
047841,000441:
047842,000442: 05,3573 30336 DNDUMP2 CA DUMPLOC
047843,000443: 05,3574 54003 TS EBANK # SET EBANK
047844,000444: 05,3575 74373 MASK LOW8 # ISOLATE RELATIVE ADDRESS.
047845,000445: 05,3576 54002 TS Q # (NOTE: MASK INSTRUCTION IS USED TO PICK
047846,000446: 05,3577 34713 CA NEG0 # UP ERASABLE REGISTERS SO THAT EDITING
047847,000447: 05,3600 54001 TS L # REGISTERS 20-23 WILL NOT BE ALTERED.)
047848,000448: 05,3601 50002 INDEX Q
047849,000449: 05,3602 E3,1400 EBANK= 1400 # PICK UP LOW ORDER REGISTER OF PAIR
047850,000450: 05,3602 71401 MASK 1401 # OF ERASABLE REGISTERS.
047851,000451: 05,3603 56001 XCH L
047852,000452: 05,3604 50002 INDEX Q # PICK UP HIGH ORDER REGISTER OF PAIR
047853,000453: 05,3605 71400 MASK 1400 # OF ERASABLE REGISTERS.
047854,000454: 05,3606 0340 EBANK= DNTMBUFF
047855,000455: 05,3606 13535 TCF DNTMEXIT # GO SEND THEM
047856,000456:
047857,000457: 05,3607 00006 SENDID EXTEND # ** ENTRANCE USED BY ERASABLE DUMP PROG. **
047858,000458: 05,3610 22335 QXCH DNTMGOTO # SET DNTMGOTO SO NEXT TIME PROG WILL GO
047859,000459: 05,3611 34747 CAF ERASID # TO LOCATION FOLLOWING :TC SENDID:
047860,000460:
047861,000461: 05,3612 54001 TS L # ** ENTRANCE USED BY REGULAR DOWNLINK PG **
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Page 1072 |
047863,000463: 05,3613 03441 TC WOZERO # GO SET WORD ORDER CODE TO ZERO
047864,000464: 05,3614 32000 CAF LOWIDCOD # PLACE SPECIAL ID CODE INTO L
047865,000465: 05,3615 56001 XCH L # AND ID BACK INTO A
047866,000466: 05,3616 13535 TCF DNTMEXIT # SEND DOWNLIST ID CODE(S).
End of include-file DOWN-TELEMETRY_PROGRAM.agc. Parent file is MAIN.agc