Source Code

These source-code files were from the printout at the MIT Museum, with many thanks to Deborah Douglas, the Museum's Curator of Science and Technology, for releasing it to us. The printout was digitally photographed by Paul Fjeld. A team of volunteers transcribed the source code manually from these images or, where appropriate, modified already-transcribed but similar source Luminary 131 (Apollo 13) source code to agree with the images from the printout. 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:

	GAP:  ASSEMBLE REVISION 001 OF AGC PROGRAM LMY99 BY NASA 2021112-061
	20'35 OCT. 28,1968
Note that the date is the date of the printout, not the date of the program revision.

042792,000002:                                                                                                  ## Copyright:   Public domain.
042793,000003:                                                                                                  ## Filename:    DOWN_TELEMETRY_PROGRAM.agc
042794,000004:                                                                                                  ## Purpose:     Part of the source code for Luminary 1A build 099.
042795,000005:                                                                                                  ##              It is part of the source code for the Lunar Module's (LM)
042796,000006:                                                                                                  ##              Apollo Guidance Computer (AGC), for Apollo 11.
042797,000007:                                                                                                  ## Assembler:   yaYUL
042798,000008:                                                                                                  ## Contact:     Ron Burkey <info@sandroid.org>.
042799,000009:                                                                                                  ## Website:     www.ibiblio.org/apollo.
042800,000010:                                                                                                  ## Pages:       988-997
042801,000011:                                                                                                  ## Mod history: 2009-05-24 RSB  Adapted from the corresponding 
042802,000012:                                                                                                  ##                              Luminary131 file, using page 
042803,000013:                                                                                                  ##                              images from Luminary 1A.
042804,000014:                                                                                                  ##              2011-01-06 JL   Fixed pseudo-label indentation.
042805,000015:                                                                                                  ##
042806,000016:                                                                                                  ## This source code has been transcribed or otherwise adapted from
042807,000017:                                                                                                  ## digitized images of a hardcopy from the MIT Museum.  The digitization
042808,000018:                                                                                                  ## was performed by Paul Fjeld, and arranged for by Deborah Douglas of
042809,000019:                                                                                                  ## the Museum.  Many thanks to both.  The images (with suitable reduction
042810,000020:                                                                                                  ## in storage size and consequent reduction in image quality as well) are
042811,000021:                                                                                                  ## available online at www.ibiblio.org/apollo.  If for some reason you
042812,000022:                                                                                                  ## find that the images are illegible, contact me at info@sandroid.org
042813,000023:                                                                                                  ## about getting access to the (much) higher-quality images which Paul
042814,000024:                                                                                                  ## actually created.
042815,000025:                                                                                                  ##
042816,000026:                                                                                                  ## Notations on the hardcopy document read, in part:
042817,000027:                                                                                                  ##
042818,000028:                                                                                                  ##      Assemble revision 001 of AGC program LMY99 by NASA 2021112-61
042819,000029:                                                                                                  ##      16:27 JULY 14, 1969 
042820,000030: 

Page 988

042822,000032:                                                                                                  #  PROGRAM NAME -- DOWN TELEMETRY PROGRAM
042823,000033:                                                                                                  #  MOD NO. -- 0          TO COMPLETELY REWRITE THE DOWN TELEMETRY PROGRAM AND DOWNLINK ERASABLE DUMP PROGRAM FOR THE
042824,000034:                                                                                                  #                        PURPOSE OF SAVING APPROXIMATELY 150 WORDS OF CORE STORAGE.
042825,000035:                                                                                                  #                        THIS CHANGE REQUIRES AN ENTIRELY NEW METHOD OF SPECIFYING DOWNLINK LISTS.  REFER TO DOWNLINK
042826,000036:                                                                                                  #                        LISTS LOG SECTION FOR MORE DETAILS.  HOWEVER THIS CHANGE WILL NOT AFFECT THE GROUND PROCESSING
042827,000037:                                                                                                  #                        OF DOWN TELEMETRY DATA.
042828,000038:                                                                                                  #  MOD BY -- KILROY, SMITH, DEWITT
042829,000039:                                                                                                  #  DATE -- 02 OCT 67
042830,000040:                                                                                                  #  AUTHORS -- KILROY, SMITH, DWWITT, DEWOLF, FAGIN
042831,000041:                                                                                                  #  LOG SECTION -- DOWN-TELEMETRY PROGRAM
042832,000042: 
042833,000043:                                                                                                  #  FUNCTIONAL DESCRIPTION -- THIS ROUTINE IS INITIATED BY TELEMETRY END
042834,000044:                                                                                                  #        PULSE FROM THE DOWNLINK TELEMETRY CONVERTER.  THIS PULSE OCCURS
042835,000045:                                                                                                  #        AT 50 TIMES PER SEC (EVERY 20 MS) THEREFORE DODOWNTM IS
042836,000046:                                                                                                  #        EXECUTED AT THESE RATES.  THIS ROUTINE SELECTS THE APPROPRIATE
042837,000047:                                                                                                  #        AGC DATA TO BE TRANSMITTED DOWNLINK AND LOADS IT INTO OUTPUT
042838,000048:                                                                                                  #        CHANNELS 34 AND 35.  THE INFORMATION IS THEN GATED OUT FROM THE
042839,000049:                                                                                                  #        LGC IN SERIAL FASHION.
042840,000050: 
042841,000051:                                                                                                  #        THIS PROGRAM IS CODED FOR A 2 SECOND DOWNLIST.  SINCE DOWNRUPTS
042842,000052:                                                                                                  #        OCCUR EVERY 20 MS AND 2 AGC COMPUTER WORDS CAN BE PLACED IN
042843,000053:                                                                                                  #        CHANNELS 34 AND 35 DURING EACH DOWNRUPT THE PROGRAM IS CAPABLE
042844,000054:                                                                                                  #        OF SENDING 200 AGC WORDS EVERY 2 SECONDS.
042845,000055: 
042846,000056:                                                                                                  #  CALLING SEQUENCE -- NONE
042847,000057:                                                                                                  #        PROGRAM IS ENTERED VIA TCF DODOWNTM WHICH IS EXECUTED AS A
042848,000058:                                                                                                  #        RESULT OF A DOWNRUPT.  CONTROL IS RETURNED VIA TCF RESUME WHICH
042849,000059:                                                                                                  #        IN EFFECT IS A RESUME.
042850,000060: 
042851,000061:                                                                                                  #  SUBROUTINES CALLED -- NONE
042852,000062: 
042853,000063:                                                                                                  #  NORMAL EXIT MODE -- TCF RESUME
042854,000064: 
042855,000065:                                                                                                  #  ALARM OR ABORT EXIT MODE -- NONE
042856,000066: 
042857,000067:                                                                                                  #  RESTART PROTECTION:
042858,000068:                                                                                                  #        ON A FRESH START AND RESTART THE `STARTSUB' SUBROUTINE WILL INITIALIZE THE DOWNLIST POINTER (ACTUALLY
042859,000069:                                                                                                  #        DNTMGOTO) TO THE BEGINNING OF THE CURRENT DOWNLIST (I.E., CURRENT CONTENTS OF DNLSTADR).  THIS HAS THE
042860,000070:                                                                                                  #        EFFECT OF IGNORING THE REMAINDER OF THE DOWNLIST WHICH THE DOWN-TELEMETRY PROGRAM WAS WORKING ON WHEN
042861,000071:                                                                                                  #        THE RESTART (OR FRESH START) OCCURRED AND RESUME DOWN TELEMETRY FROM THE BEGINNING OF THE CURRENT
042862,000072:                                                                                                  #        DOWNLIST.
042863,000073: 
042864,000074:                                                                                                  #        ALSO OF INTEREST IS THE FACT THAT ON A RESTART THE AGC WILL ZERO DOWNLINK CHANNELS 13, 34 AND 35.
042865,000075: 
042866,000076:                                                                                                  #  DOWNLINK LIST SELECTION:
042867,000077:                                                                                                  #        THE APPROPRIATE DOWNLINK LISTS ARE SELECTED BY THE FOLLOWING:
042868,000078:                                                                                                  #        1.      FRESH START
042869,000079:                                                                                                  #        2.      V37EXXE WHERE XX = THE MAJOR MODE BEING SELECTED.
042870,000080:                                                                                                  #        3.      UPDATE PROGRAM (P27)
042871,000081:                                                                                                  #        4.      NON-V37 SELECTABLE TYPE PROGRAMS (E.G., AGS INITIALIZATION (SUNDANCE, LUMINARY) AND P61-P62
042872,000082:                                                                                                  #                TRANSITION (COLOSSUS) ETC.).
042873,000083: 
042874,000084:                                                                                                  #  DOWNLINK LIST RULES AND LIMITATIONS:
042875,000085:                                                                                                  #        READ SECTION(S) WHICH FOLLOW `DEBRIS' WRITEUP.
042876,000086: 
042877,000087:                                                                                                  #  OUTPUT -- EVERY 2 SECONDS 100 DOUBLE PRECISION WORDS (I.E., 200 LGC
042878,000088:                                                                                                  #        COMPUTER WORDS) ARE TRANSMITTED VIA DOWNLINK.
042879,000089: 
042880,000090:                                                                                                  #  ERASABLE INITIALIZATION REQUIRED -- NONE
042881,000091:                                                                                                  #        `DNTMGOTO' AND `DNLSTADR' ARE INITIALIZED BY THE FRESH START PROGRAM.
042882,000092: 
042883,000093:                                                                                                  #  DEBRIS (ERASABLE LOCATIONS DESTROYED BY THIS PROGRAM) --
042884,000094:                                                                                                  #        LDATALST, DNTMBUFF TO DNTMBUFF +21D, TMINDEX, DNQ.

Page 989 (empty page) Page 990

042887,000097:                                                                                                  #  DODOWNTM IS ENTERED EVERY 20 MS BY AN INTERRUPT TRIGGERED BY THE
042888,000098:                                                                                                  #  RECEIPT OF AN ENDPULSE FROM THE SPACECRAFT TELEMETRY PROGRAMMER.
042889,000099: 
042890,000100:                                                                                                  #  NOTES REGARDING DOWNLINK LISTS ASSOCIATED WITH THIS PROGRAM:
042891,000101:                                                                                                  #  1.    DOWNLISTS.  DOWNLISTS MUST BE COMPILED IN THE SAME BANK AS THE
042892,000102:                                                                                                  #        DOWN-TELEMETRY PROGRAM.  THIS IS DONE FOR EASE OF CODING, FASTER
042893,000103:                                                                                                  #        EXECUTION.
042894,000104:                                                                                                  #  2.    EACH DOWNLINK LIST CONSISTS OF A CONTROL LIST AND A NUMBER OF
042895,000105:                                                                                                  #        SUBLISTS.
042896,000106:                                                                                                  #  3.    A SUBLIST REFERS TO A SNAPSHOT OR DATA COMMON TO THE SAME OR OTHER
042897,000107:                                                                                                  #        DOWNLINK LISTS.  ANY SUBLIST CONTAINING COMMON DATA NEEDS TO BE
042898,000108:                                                                                                  #        CODED ONLY ONCE FOR THE APPLICABLE DOWNLINK LISTS.
042899,000109:                                                                                                  #  4.    SNAPSHOT SUBLISTS REFER SPECIFICALLY TO HOMOGENEOUS DATA WHICH MUST BE
042900,000110:                                                                                                  #        SAVED IN A BUFFER DURING ONE DOWNRUPT.
042901,000111:                                                                                                  #  5.    THE 1DNADR FOR THE 1ST WORD OF SNAPSHOT DATA IS FOUND AT THE END
042902,000112:                                                                                                  #        OF EACH SNAPSHOT SUBLIST, SINCE THE PROGRAM CODING SENDS THIS DP WORD
042903,000113:                                                                                                  #        IMMEDIATELY AFTER STORING THE OTHERS IN THE SNAPSHOT BUFFER.
042904,000114:                                                                                                  #  6.    ALL LISTS ARE COMBINATIONS OF CODED ERASABLE ADDRESS CONSTANTS
042905,000115:                                                                                                  #        CREATED FOR THE DOWNLIST PROGRAM.
042906,000116:                                                                                                  #        A.      1DNADR                  1-WORD DOWNLIST ADDRESS.
042907,000117:                                                                                                  #                SAME AS ECADR, BUT USED WHEN THE WORD ADDRESSED IS THE LEFT
042908,000118:                                                                                                  #                HALF OF A DOUBLE-PRECISION WORD FOR DOWN TELEMETRY.
042909,000119:                                                                                                  #        B.      2DNADR - 6DNADR         N-WORD DOWNLIST ADDRESS, N = 2 - 6.
042910,000120:                                                                                                  #                SAME AS 1DNADR, BUT WTIH THE 4 UNUSED BITS OF THE ECADR FORMAT
042911,000121:                                                                                                  #                FILLED IN WITH 0001-0101.  USED TO POINT TO A LIST OF N DOUBLE-
042912,000122:                                                                                                  #                PRECISION WORDS, STORED CONSECUTIVELY, FOR DOWN TELEMETRY.
042913,000123:                                                                                                  #        C.      DNCHAN                  DOWNLIST CHANNEL ADDRESS.
042914,000124:                                                                                                  #                SAME AS 1DNADR, BUT WITH PREFIX BITS 0111.  USED TO POINT TO
042915,000125:                                                                                                  #                A PAIR OF CHANNELS FOR DOWN TELEMETRY.
042916,000126:                                                                                                  #        D.      DNPTR                   DOWN-TELEMETRY SUBLIST POINTER.
042917,000127:                                                                                                  #                SAME AS CAF BUT TAGGED AS A CONSTANT.  USED IN CONTROL LIST TO POINT TO A SUBLIST.
042918,000128:                                                                                                  #                CAUTION --- A DNPTR CANNOT BE USED IN A SUBLIST.
042919,000129:                                                                                                  #  7.    THE WORD ORDER CODE IS SET TO ZERO AT THE BEGINNING OF EACH DOWNLIST (I.E., CONTROL LIST) AND WHEN
042920,000130:                                                                                                  #        A `1DNADR TIME2' IS DETECTED IN THE CONTROL LIST (ONLY).
042921,000131:                                                                                                  #  8.    IN THE SNAPSHOT SUBLIST ONLY, THE DNADR'S CANNOT POINT TO THE FIRST WORD OF ANY EBANK.
042922,000132: 
042923,000133:                                                                                                  #  DOWNLIST LIST RESTRICTIONS:
042924,000134:                                                                                                  #  (THE FOLLOWING POINTS MAY BE LISTED ELSEWHERE BUT ARE LISTED HERE SO IT IS CLEAR THAT THESE THINGS CANNOT BE
042925,000135:                                                                                                  #  DONE)
042926,000136:                                                                                                  #  1.    SNAPSHOT DOWNLIST:
042927,000137:                                                                                                  #        (A) CANNOT CONTAIN THE FOLLOWING ECADRS (I.E., 1DNADR'S): Q, 400, 1000, 1400, 2000, 2400, 3000, 3400.
042928,000138:                                                                                                  #        (B) CAN CONTAIN ONLY 1DNADR'S
042929,000139:                                                                                                  #  2.    ALL DOWNLINKED DATA (EXCEPT CHANNELS) IS PICKED UP BY A DCA SO DOWNLINK LISTS CANNOT CONTAIN THE
042930,000140:                                                                                                  #        EQUIVALENT OF THE FOLLOWING ECADRS (I.E., 1DNADRS): 377, 777, 1377, 1777, 2377, 2777, 3377, 3777.
042931,000141:                                                                                                  #        (NOTE: THE TERM `EQUIVALENT' MEANT THAT THE 1DNADR TO 6DNADR WILL BE PROCESSED LIKE 1 TO 6 ECADRS)
042932,000142:                                                                                                  #  3.    CONTROL LISTS AND SUBLISTS CANNOT HAVE ENTRIES = OCTAL 00000 OR OCTAL 77777

Page 991

042934,000144:                                                                                                  #  4.    THE `1DNADR TIME2' WHICH WILL CAUSE THE DOWNLINK PROGRAM TO SET THE WORDER CODE TO 3 MUST APPEAR IN THE
042935,000145:                                                                                                  #        CONTROL SECTION OF THE DOWNLIST.
042936,000146:                                                                                                  #  5.    `DNCHAN 0' CANNOT BE USED.
042937,000147:                                                                                                  #  6.    `DNPTR 0' CANNOT BE USED.
042938,000148:                                                                                                  #  7.    DNPTR CANNOT APPEAR IN A SUBLIST.
042939,000149: 
042940,000150:                                                                                                  #  EBANK SETTINGS
042941,000151:                                                                                                  #        IN THE PROCESS OF SETTING THE EBANK (WHEN PICKING UP DOWNLINK DATA) THE DOWN TELEMETRY PROGRAM PUTS
042942,000152:                                                                                                  #        `GARBAGE' INTO BITS15-12 OF EBANK.  HUGH BLAIR-SMITH WARNS US THAT BITS15-12 OF EBANK MAY BECOME
042943,000153:                                                                                                  #        SIGNIFICANT SOMEDAY IN THE FUTURE.  IF/WHEN THAT HAPPENS, THE PROGRAM SHOULD INSURE (BY MASKING ETC.)
042944,000154:                                                                                                  #        THAT BITS 15-12 OF EBANK ARE ZERO.
042945,000155: 
042946,000156:                                                                                                  #  INITIALIZATION REQUIRED -- TO INTERRUPT CURRENT LIST AND START A NEW ONE.
042947,000157:                                                                                                  #        1. ADRES OF DOWNLINK LIST INTO DNLSTADR
042948,000158:                                                                                                  #        2. NEGONE INTO SUBLIST
042949,000159:                                                                                                  #        3. NEGONE INTO DNECADR
042950,000160: 
042951,000161: 22,3711                                           BANK     22                                    
042952,000162: 05,2000                                           SETLOC   DOWNTELM                              
042953,000163: 05,2000                                           BANK                                           
042954,000164: 
042955,000165: 05,3506     0340                                  EBANK=   DNTMBUFF                              
042956,000166: 
042957,000167: 05,3506                                           COUNT*   $$/DPROG                              
042958,000168: 05,3506           54016        DODOWNTM           TS       BANKRUPT                              
042959,000169: 05,3507           00006                           EXTEND                                         
042960,000170: 05,3510           22012                           QXCH     QRUPT                                 #  SAVE Q
042961,000171: 05,3511           13763                           TCF      WOTEST                                
042962,000172: 05,3512           00006        WO1                EXTEND                                         #  SET WORD ORDER BIT TO 1 ONLY IF IT
042963,000173: 05,3513           05013                           WOR      CHAN13                                #  ALREADY ISN'T
042964,000174: 05,3514           00335                           TC       DNTMGOTO                              #  GOTO APPROPRIATE PHASE OF PROGRAM
042965,000175: 
042966,000176: 05,3515           37747        DNPHASE1           CA       NEGONE                                #  INITIALIZE ALL CONTROL WORDS
042967,000177: 05,3516           54337                           TS       SUBLIST                               #  WORDS TO MINUS ONE
042968,000178: 05,3517           54336                           TS       DNECADR                               
042969,000179: 05,3520           33640                           CA       LDNPHAS2                              #  SET DNTMGOTO = 0 ALL SUSEQUENT DOWRUPTS
042970,000180: 05,3521           54335                           TS       DNTMGOTO                              #  GO TO DNPHASE2
042971,000181: 05,3522           13536                           TCF      NEWLIST                               
042972,000182: 05,3523           10336        DNPHASE2           CCS      DNECADR                               #  SENDING OF DATA IN PROGRESS
042973,000183: 05,3524           03653        DODNADR            TC       FETCH2WD                              #  YES -- THEN FETCH THE NEXT 2 SP WORDS
042974,000184: 05,3525           77753        MINTIME2           -1DNADR  TIME2                                 #  NEGATIVE OF TIME2 1DNADR
042975,000185: 05,3526           13527                           TCF      +1                                    #  (ECADR OF 3776 + 74001 = 77777)
042976,000186: 
042977,000187: 05,3527           10337                           CCS      SUBLIST                               #  IS THE SUBLIST IN CONTROL
042978,000188: 05,3530           13666                           TCF      NEXTINSL                              #  YES

Page 992

042980,000190: 05,3531           74001        DNADRDCR           OCT      74001                                 #  DNADR COUNT AND ECADR DECREMENTER
042981,000191: 
042982,000192: 05,3532           30334        CHKLIST            CA       CTLIST                                
042983,000193: 05,3533           00006                           EXTEND                                         
042984,000194: 05,3534           63536                           BZMF     NEWLIST                               #  IT WILL BE NEGATIVE AT END OF LIST
042985,000195: 05,3535           13543                           TCF      NEXTINCL                              
042986,000196: 05,3536           50332        NEWLIST            INDEX    DNLSTCOD                              
042987,000197: 05,3537           32441                           CA       DNTABLE                               #  INITIALIZE CTLIST WITH
042988,000198: 05,3540           54334                           TS       CTLIST                                #        STARTING ADDRESS OF NEW LIST
042989,000199: 05,3541           40332                           CS       DNLSTCOD                              
042990,000200: 05,3542           13756                           TCF      SENDID     +3                         
042991,000201: 05,3543           50334        NEXTINCL           INDEX    CTLIST                                
042992,000202: 05,3544           30000                           CA       0                                     
042993,000203: 05,3545           10000                           CCS      A                                     
042994,000204: 05,3546           24334                           INCR     CTLIST                                #  SET POINTER TO PICK UP NEXT CTLIST WORD
042995,000205: 05,3547           13553                           TCF      +4                                    #  ON NEXT ENTRY TO PROG.  (A SHOULD NOT =0)
042996,000206: 05,3550           56334                           XCH      CTLIST                                #  SET CTLIST TO NEGATIVE AND PLACE(CODING)
042997,000207: 05,3551           40000                           COM                                            #  UNCOMPLEMENTED DNADR INTO A.    (FOR LA)
042998,000208: 05,3552           56334                           XCH      CTLIST                                #                                  (ST IN )
042999,000209: 05,3553           24000                 +4        INCR     A                                     #                                  (CTLIST)
043000,000210: 05,3554           54336                           TS       DNECADR                               #  SAVE DNADR
043001,000211: 05,3555           63525                           AD       MINTIME2                              #  TEST FOR TIME2 (NEG. OF ECADR)
043002,000212: 05,3556           10000                           CCS      A                                     
043003,000213: 05,3557           13563                           TCF      SETWO      +1                         #  DON'T SET WORD ORDER CODE
043004,000214: 05,3560           47777        MINB1314           OCT      47777                                 #  MINUS BIT 13 AND 14 (CAN'T GET HERE)
043005,000215: 05,3561           13563                           TCF      SETWO      +1                         #  DON'T SET WORD ORDER CODE
043006,000216: 05,3562           03605        SETWO              TC       WOZERO                                #  GO SET WORD ORDER CODE TO ZERO.
043007,000217: 05,3563           30336                 +1        CA       DNECADR                               #  RELOAD A WITH THE DNADR.
043008,000218: 05,3564           63560                 +2        AD       MINB1314                              #  IS THIS A REGULAR DNADR?
043009,000219: 05,3565           00006                           EXTEND                                         
043010,000220: 05,3566           63653                           BZMF     FETCH2WD                              #  YES.  (A MUST NEVER BE ZERO)
043011,000221: 05,3567           67741                           AD       MINB12                                #  NO.  IS IT A POINTER (DNPTR) OR A
043012,000222: 05,3570           00006                           EXTEND                                         #        CHANNEL(DNCHAN)
043013,000223: 05,3571           63611                           BZMF     DODNPTR                               #  IT'S A POINTER.  (A MUST NEVER BE ZERO)
043014,000224: 
043015,000225: 05,3572           00006        DODNCHAN           TC       6                                     #  (EXECUTED AS EXTEND)  IT'S A CHANNEL
043016,000226: 05,3573           50336                           INDEX    DNECADR                               
043017,000227: 05,3574           44000                           INDEX    0          -4000                      #  (EXECUTED AS READ)
043018,000228: 05,3575           54001                           TS       L                                     
043019,000229: 05,3576           00006                           TC       6                                     #  (EXECUTED AS EXTEND)
043020,000230: 05,3577           50336                           INDEX    DNECADR                               
043021,000231: 05,3600           43777                           INDEX    0          -4001                      #  (EXECUTED AS READ)
043022,000232: 05,3601           54336                           TS       DNECADR                               #  SET DNECADR
043023,000233: 05,3602           37747                           CA       NEGONE                                #        TO MINUS
043024,000234: 05,3603           56336                           XCH      DNECADR                               #                WHILE PRESERVING A.
043025,000235: 05,3604           13701                           TCF      DNTMEXIT                              #  GO SEND CHANNELS
043026,000236: 
043027,000237: 05,3605           44745        WOZERO             CS       BIT7                                  
043028,000238: 05,3606           00006                           EXTEND                                         
043029,000239: 05,3607           03013                           WAND     CHAN13                                #  SET WORD ORDER CODE TO ZERO

Page 993

043031,000241: 05,3610           00002                           TC       Q                                     #  RETURN TO CALLER
043032,000242: 
043033,000243: 05,3611           50336        DODNPTR            INDEX    DNECADR                               #  DNECADR CONTAINS ADRES OF SUBLIST
043034,000244: 05,3612           00000                           0        0                                     #  CLEAR AND ADD LIST ENTRY INTO A.
043035,000245: 05,3613           10000                           CCS      A                                     #  IS THIS A SNAPSHOT SUBLIST
043036,000246: 05,3614           30336                           CA       DNECADR                               #  NO, IT IS A REGULAR SUBLIST.
043037,000247: 05,3615           13665                           TCF      DOSUBLST                              #  A MUST NOT BE ZERO.
043038,000248: 
043039,000249: 05,3616           56336                           XCH      DNECADR                               #  YES.  IT IS A SNAPSHOT SUBLIST.
043040,000250: 05,3617           54337                           TS       SUBLIST                               #  C(DNECADR) INTO SUBLIST
043041,000251: 05,3620           34755                           CAF      ZERO                                  #        A    INTO     A
043042,000252: 05,3621           56336                           XCH      TMINDEX                               #  (NOTE:  TMINDEX = DNECADR)
043043,000253: 
043044,000254:                                                                                                  #  THE FOLLOWING CODING (FROM SNAPLOOP TO SNAPEND) IS FOR THE PURPOSE OF TAKING A SNAPSHOT OF 12 DP REGISTERS.
043045,000255:                                                                                                  #  THIS IS DONE BY SAVING 11 DP REGISTERS IN DNTMBUFF AND SENDING THE FIRST DP WORD IMMEDIATELY.
043046,000256:                                                                                                  #  THE SNAPSHOT PROCESSING IS THE MOST TIME CONSUMING AND THEREFORE THE CODING AND LIST STRUCTURE WERE DESIGNED
043047,000257:                                                                                                  #  TO MINIMIZE TIME.  THE TIME OPTIMIZATION RESULTS IN RULES UNIQUE TO THE SNAPSHOT PORTION OF THE DOWNLIST.
043048,000258:                                                                                                  #  THESE RULES ARE ......
043049,000259:                                                                                                  #        1.      ONLY 1DNADR'S CAN APPEAR IN THE SNAPSHOT SUBLIST
043050,000260:                                                                                                  #        2.      THE 1DNADR'S CANNOT REFER TO THE FIRST LOCATION IN ANY BANK.
043051,000261: 
043052,000262: 05,3622           54003        SNAPLOOP           TS       EBANK                                 #  SET EBANK
043053,000263: 05,3623           74357                           MASK     LOW8                                  #  ISOLATE RELATIVE ADDRESS
043054,000264: 05,3624           00006                           EXTEND                                         
043055,000265: 05,3625           50000                           INDEX    A                                     
043056,000266: 05,3626  E3,1401                                  EBANK=   1401                                  
043057,000267: 05,3626           31402                           DCA      1401                                  #  PICK UP 2 SNAPSHOT WORDS.
043058,000268: 05,3627     0340                                  EBANK=   DNTMBUFF                              
043059,000269: 05,3627           50336                           INDEX    TMINDEX                               
043060,000270: 05,3630           52341                           DXCH     DNTMBUFF                              #  STORE 2 SNAPSHOT WORDS IN BUFFER
043061,000271: 05,3631           24336                           INCR     TMINDEX                               #  SET BUFFER INDEX FOR NEXT 2 WORDS.
043062,000272: 05,3632           24336                           INCR     TMINDEX                               
043063,000273: 05,3633           24337        SNAPAGN            INCR     SUBLIST                               #  SET POINTER TO NEXT 2 WORDS OF SNAPSHOT
043064,000274: 05,3634           50337                           INDEX    SUBLIST                               
043065,000275: 05,3635           00000                           0        0                                     #  = CA SSSS (SSSS = NEXT ENTRY IN SUBLIST)
043066,000276: 05,3636           10000                           CCS      A                                     #  TEST FOR LAST TWO WORDS OF SNAPSHOT.
043067,000277: 05,3637           13622                           TCF      SNAPLOOP                              #  NOT LAST TWO.
043068,000278: 05,3640           03523        LDNPHAS2           GENADR   DNPHASE2                              
043069,000279: 05,3641           54337                           TS       SUBLIST                               #  YES, LAST.  SAVE A.
043070,000280: 05,3642           37747                           CA       NEGONE                                #  SET DNECADR AND
043071,000281: 05,3643           54336                           TS       DNECADR                               #        SUBLIST POINTERS
043072,000282: 05,3644           56337                           XCH      SUBLIST                               #                TO NEGATIVE VALUES
043073,000283: 05,3645           54003                           TS       EBANK                                 
043074,000284: 05,3646           74357                           MASK     LOW8                                  
043075,000285: 05,3647           00006                           EXTEND                                         
043076,000286: 05,3650           50000                           INDEX    A                                     
043077,000287: 05,3651  E3,1401                                  EBANK=   1401                                  
043078,000288: 05,3651           31402                           DCA      1401                                  #  PICK UP FIRST 2 WORDS OF SNAPSHOT.

Page 994

043080,000290: 05,3652     0340                                  EBANK=   DNTMBUFF                              
043081,000291: 05,3652           13701        SNAPEND            TCF      DNTMEXIT                              #  NOW TO SEND THEM.
043082,000292: 
043083,000293: 05,3653           30336        FETCH2WD           CA       DNECADR                               
043084,000294: 05,3654           54003                           TS       EBANK                                 #  SET EBANK
043085,000295: 05,3655           74357                           MASK     LOW8                                  #  ISOLATE RELATIVE ADDRESS
043086,000296: 05,3656           54001                           TS       L                                     
043087,000297: 05,3657           33531                           CA       DNADRDCR                              #  DECREMENT COUNT AND ECADR
043088,000298: 05,3660           26336                           ADS      DNECADR                               
043089,000299: 05,3661           00006                           EXTEND                                         
043090,000300: 05,3662           50001                           INDEX    L                                     
043091,000301: 05,3663  E3,1400                                  EBANK=   1400                                  
043092,000302: 05,3663           31401                           DCA      1400                                  #  PICK UP 2 DATA WORDS
043093,000303: 05,3664     0340                                  EBANK=   DNTMBUFF                              
043094,000304: 05,3664           13701                           TCF      DNTMEXIT                              #  NOW GO SEND THEM.
043095,000305: 
043096,000306: 05,3665           54337        DOSUBLST           TS       SUBLIST                               #  SET SUBLIST POINTER
043097,000307: 05,3666           50337        NEXTINSL           INDEX    SUBLIST                               
043098,000308: 05,3667           00000                           0        0                                     #  = CA SSSS (SSSS = NEXT ENTRY IN SUBLIST)
043099,000309: 05,3670           10000                           CCS      A                                     #  IS IT THE END OF THE SUBLIST
043100,000310: 05,3671           24337                           INCR     SUBLIST                               #  NO --
043101,000311: 05,3672           13676                           TCF      +4                                    
043102,000312: 05,3673           54337                           TS       SUBLIST                               #  SAVE A.
043103,000313: 05,3674           37747                           CA       NEGONE                                #  SET SUBLIST TO MINUS
043104,000314: 05,3675           56337                           XCH      SUBLIST                               #  RETRIEVE A.
043105,000315: 05,3676           24000                 +4        INCR     A                                     
043106,000316: 05,3677           54336                           TS       DNECADR                               #  SAVE DNADR
043107,000317: 05,3700           13564                           TCF      SETWO      +2                         #  GO USE COMMON CODING (PROLEMS WOULD
043108,000318:                                                                                                  #  OCCUR IF THE PROGRAM ENCOUNTERED A
043109,000319:                                                                                                  #  DNPTR NOW)
043110,000320: 
043111,000321: 05,3701           00006        DNTMEXIT           EXTEND                                         #  DOWN-TELEMETRY EXIT
043112,000322: 05,3702           01034                           WRITE    DNTM1                                 #  TO SEND A + L TO CHANNELS 34 + 35
043113,000323: 05,3703           30001                           CA       L                                     #  RESPECTIVELY
043114,000324: 05,3704           00006        TMEXITL            EXTEND                                         
043115,000325: 05,3705           01035                           WRITE    DNTM2                                 
043116,000326: 05,3706           15270        TMRESUME           TCF      RESUME                                #  EXIT TELEMTRY PROGRAM VIA RESUME.
043117,000327: 
043118,000328: 05,3707     7741               MINB12             EQUALS   -1/8                                  
043119,000329: 05,3707     0336               DNECADR            EQUALS   TMINDEX                               
043120,000330: 05,3707     0334               CTLIST             EQUALS   LDATALST                              
043121,000331: 05,3707     0337               SUBLIST            EQUALS   DNQ                                   
043122,000332: 

Page 995

043124,000334:                                                                                                  #  SUBROUTINE NAME -- DNDUMP
043125,000335: 
043126,000336:                                                                                                  #  FUNCTIONAL DESCRIPTION -- TO SEND (DUMP) ALL ERASABLE STORAGE 'N' TIMES. (N=1 TO 4).  BANKS ARE SENT ONE AT A TIME
043127,000337:                                                                                                  #        EACH BANK IS PRECEDED BY AN ID WORD, SYNCH BITS, ECADR AND TIME1 FOLLOWED BY THE 256D WORDS OF EACH
043128,000338:                                                                                                  #        EBANK.  EBANKS ARE DUMPED IN ORDER (I.E., EBANK 0 FIRST, THEN EBANK1 ETC.)
043129,000339: 
043130,000340:                                                                                                  #  CALLING SEQUENCE -- THE GROUND OR ASTRONAUT BY KEYING V74E CAN INITIALIZE THE DUMP.
043131,000341:                                                                                                  #        AFTER KEYING IN V74E THE CURRENT DOWNLIST WILL BE IMMEDIATELY TERMINATED AND THE DOWNLINK ERASABLE DUMP
043132,000342:                                                                                                  #        WILL BEGIN.
043133,000343: 
043134,000344:                                                                                                  #        ONCE INITITIATED THE DOWNLINK ERASABLE DUMP CAN BE TERMINATED (AND INTERRUPTED DOWNLIST REINSTATED) ONLY
043135,000345:                                                                                                  #        BY THE FOLLOWING:
043136,000346: 
043137,000347:                                                                                                  #        1.      A FRESH START
043138,000348:                                                                                                  #        2.      COMPLETION OF ALL DOWNLINK DUMPS REQUESTED (ACCORDING TO BITS SET IN DUMPCNT).  NOTE THAT DUMPCNT
043139,000349:                                                                                                  #                CAN BE ALTERED BY A V21N01.
043140,000350:                                                                                                  #        3.      AND INVOLUNTARILY BY A RESTART.
043141,000351: 
043142,000352:                                                                                                  #  NORMAL EXIT MODE -- TCF DNPHASE1
043143,000353: 
043144,000354:                                                                                                  #  ALARM OR ABORT MODE -- NONE
043145,000355: 
043146,000356:                                                                                                  #  *SUBROUTINES CALLED -- NONE
043147,000357: 
043148,000358:                                                                                                  #  ERASABLE INITIALIZATION REQUIRED --
043149,000359:                                                                                                  #        DUMPCNT         OCT 20000       IF 4 COMPLETE ERASABLE DUMPS ARE DESIRED
043150,000360:                                                                                                  #        DUMPCNT         OCT 10000       IF 2 COMPLETE ERASABLE DUMPS ARE DESIRED
043151,000361:                                                                                                  #        DUMPCNT         OCT 04000       IF 1 COMPLETE ERASABLE DUMP  IS  DESIRED
043152,000362: 
043153,000363:                                                                                                  #  DEBRIS -- DUMPLOC, DUMPSW, DNTMGOTO, EBANK, AND CENTRAL REGISTERS
043154,000364: 
043155,000365:                                                                                                  #  TIMING --     TIME (IN SECS) = ((NO.DUMPS)*(NO.EBANKS)*(WDSPEREBANK + NO.IDWDS)) / NO.WDSPERSEC
043156,000366:                                                                                                  #                TIME (IN SECS) =  (   4    )*(    8    )*(    256     +     4   )  /     100
043157,000367:                                                                                                  #                THUS TIME (IN SECS TO SEND DUMP OF ERASABLE 4 TIMES VIA DOWNLINK) = 83.2 SECONDS
043158,000368: 
043159,000369:                                                                                                  #  STRUCTURE OF ONE EBANK AS IT IS SENT BY DOWNLINK PROGRAM --
043160,000370:                                                                                                  #        (REMINDER -- THIS ONLY DESCRIBES ONE OF THE 8 EBANKS X 4 (DUMPS) = 32 EBANKS WHICH WILL BE SENT BY DNDUMP)
043161,000371: 
043162,000372:                                                                                                  #        DOWNLIST                                W
043163,000373:                                                                                                  #          WORD  TAKEN FROM CONTENTS OF  EXAMPLE O       COMMENTS
043164,000374:                                                                                                  #            1   ERASID                   0177X  0       DOWNLIST I.D. FOR DOWNLINK ERASABLE DUMP (X=7 CSM, 6 LM)
043165,000375:                                                                                                  #            2   LOWIDCOD                 77340  1       DOWNLINK SYNCH BITS.  (SAME ONE USED IN ALL OTHER DOWNLISTS)
043166,000376:                                                                                                  #            3   DUMPLOC                  13400  1       (SEE NOTES ON DUMPLOC) 1 = 3RD ERAS DUMP, 3400=ECADR OF 5TH WD
043167,000377:                                                                                                  #            4   TIME1                    14120  1       TIME IN CENTISECONDS
043168,000378:                                                                                                  #            5   FIRST WORD OF EBANK X    03400  1       IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1400 (ECADR 3400)
043169,000379:                                                                                                  #            6   2ND   WORD OF EBANK X    00142  1       IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1401 (ECADR 3401)
043170,000380:                                                                                                  #            7   3RD   WORD OF EBANK X    00142  1       IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1402 (ECADR 3402)
043171,000381:                                                                                                  #            .
043172,000382:                                                                                                  #            .
043173,000383:                                                                                                  #            .
043174,000384:                                                                                                  #         260D   256TH WORD OF EBANK X    03777  1       IN THIS EXAMPLE THIS WORD = CONTENTS OF E7,1777 (ECADR 3777)
043175,000385: 
043176,000386:                                                                                                  #  NOTE --       DUMPLOC CONTAINS THE COUNTER AND ECADR FOR EACH WORD BEING SENT.
043177,000387:                                                                                                  #                THE BIT STRUCTURE OF DUMPLOC IS FOLLOW --
043178,000388:                                                                                                  #                                                X = NOT USED
043179,000389:                                                                                                  #                X ABC EEE RRRRRRRR            ABC = ERASABLE DUMP COUNTER (I.E. ABC = 0,1,2, OR 3 WHICH MEANS THAT
043180,000390:                                                                                                  #                                                    COMPLETE ERASABLE DUMP NUMBER 1,2,3, OR 4 RESPECTIVELY IS IN PROGRESS)
043181,000391:                                                                                                  #                                              EEE = EBANK BITS
043182,000392:                                                                                                  #                                         RRRRRRRR = RELATIVE ADDRESS WITHIN AN EBANK
043183,000393: 

Page 996

043185,000395: 05,3707           34755        DNDUMPI            CA       ZERO                                  #  INITIALIZE DOWNLINK
043186,000396: 05,3710           54336                           TS       DUMPLOC                               #  ERASABLE DUMP
043187,000397: 05,3711           03753                 +2        TC       SENDID                                #  GO SEND ID AND SYNCH BITS
043188,000398: 05,3712           33721                           CA       LDNDUMP1                              #  SET DNTMGOTO
043189,000399: 05,3713           54335                           TS       DNTMGOTO                              #  TO LOCATION FOR NEXT PASS
043190,000400: 05,3714           30025                           CA       TIME1                                 #  PLACE TIME1
043191,000401: 05,3715           56001                           XCH      L                                     #  INTO L
043192,000402: 05,3716           30336                           CA       DUMPLOC                               #  AND ECADR OF THIS EBANK INTO A
043193,000403: 05,3717           13701                           TCF      DNTMEXIT                              #  SEND DUMPLOC AND TIME1
043194,000404: 
043195,000405: 05,3720           03722        LDNDUMP            ADRES    DNDUMP                                
043196,000406: 05,3721           03735        LDNDUMP1           ADRES    DNDUMP1                               
043197,000407: 
043198,000408: 05,3722           34752        DNDUMP             CA       TWO                                   #  INCREMENT ECADR IN DUMPLOC
043199,000409: 05,3723           26336                           ADS      DUMPLOC                               #  TO NEXT DP WORD TO BE
043200,000410: 05,3724           74357                           MASK     LOW8                                  #  DUMPED AND SAVE IT.
043201,000411: 05,3725           10000                           CCS      A                                     #  IS THIS THE BEGINNING OF A NEW EBANK
043202,000412: 05,3726           13737                           TCF      DNDUMP2                               #  NO -- THEN CONTINUE DUMPING
043203,000413: 05,3727           30336                           CA       DUMPLOC                               #  YES -- IS THIS THE END OF THE
043204,000414: 05,3730           70333                           MASK     DUMPCNT                               #  N TH (N = 1 TO 4) COMPLETE ERASABLE
043205,000415: 05,3731           77722                           MASK     PRIO34                                #  DUMP (BIT14 FOR 4, BIT13 FOR 2 OR BIT12
043206,000416: 05,3732           10000                           CCS      A                                     #  FOR 1 COMPLETE ERASABLE DUMP(S)).
043207,000417: 05,3733           13515                           TCF      DNPHASE1                              #  YES -- START SENDING INTERRUPTED DOWNLIST
043208,000418:                                                                                                  #  AGAIN
043209,000419: 05,3734           13711                           TCF      DNDUMPI    +2                         #  NO -- GO BACK AND INITIALIZE NEXT BANK
043210,000420: 
043211,000421: 05,3735           33720        DNDUMP1            CA       LDNDUMP                               #  SET DNTMGOTO
043212,000422: 05,3736           54335                           TS       DNTMGOTO                              #  FOR WORDS 3 TO 256D OF CURRENT EBANK
043213,000423: 
043214,000424: 05,3737           30336        DNDUMP2            CA       DUMPLOC                               
043215,000425: 05,3740           54003                           TS       EBANK                                 #  SET EBANK
043216,000426: 05,3741           74357                           MASK     LOW8                                  #  ISOLATE RELATIVE ADDRESS.
043217,000427: 05,3742           54002                           TS       Q                                     #  (NOTE: MASK INSTRUCTION IS USED TO PICK
043218,000428: 05,3743           34754                           CA       NEG0                                  #  UP ERASABLE REGISTERS SO THAT EDITING
043219,000429: 05,3744           54001                           TS       L                                     #  REGISTERS 20-23 WILL NOT BE ALTERED.)
043220,000430: 05,3745           50002                           INDEX    Q                                     
043221,000431: 05,3746  E3,1400                                  EBANK=   1400                                  #  PICK UP LOW ORDER REGISTER OF PAIR
043222,000432: 05,3746           71401                           MASK     1401                                  #  OF ERASABLE REGISTERS.
043223,000433: 05,3747           56001                           XCH      L                                     
043224,000434: 05,3750           50002                           INDEX    Q                                     #  PICK UP HIGH ORDER REGISTER OF PAIR
043225,000435: 05,3751           71400                           MASK     1400                                  #  OF ERASABLE REGISTERS.
043226,000436: 05,3752     0340                                  EBANK=   DNTMBUFF                              
043227,000437: 05,3752           13701                           TCF      DNTMEXIT                              #  GO SEND THEM
043228,000438: 
043229,000439: 05,3753           00006        SENDID             EXTEND                                         #  ** ENTRANCE USED BY ERASABLE DUMP PROG. **
043230,000440: 05,3754           22335                           QXCH     DNTMGOTO                              #  SET DNTMGOTO SO NEXT TIME PROG WILL GO
043231,000441: 05,3755           35011                           CAF      ERASID                                #  TO LOCATION FOLLOWING `TC SENDID'
043232,000442: 
043233,000443: 05,3756           54001                           TS       L                                     #  ** ENTRANCE USED BY REGULAR DOWNLINK PG **

Page 997

043235,000445: 05,3757           03605                           TC       WOZERO                                #  GO SET WORD ORDER CODE TO ZERO
043236,000446: 05,3760           32065                           CAF      LOWIDCOD                              #  PLACE SPECIAL ID CODE INTO L
043237,000447: 05,3761           56001                           XCH      L                                     #  AND ID BACK INTO A
043238,000448: 05,3762           13701                           TCF      DNTMEXIT                              #  SEND DOWNLIST ID CODE(S).
043239,000449: 
043240,000450: 05,3763           34745        WOTEST             CA       BIT7                                  #  AT THE BEGINNING OF THE LIST THE WORD
043241,000451: 05,3764           00006                           EXTEND                                         #  ORDER BIT WILL BE SET BACK TO ZERO
043242,000452: 05,3765           02013                           RAND     CHAN13                                
043243,000453: 05,3766           10000                           CCS      A                                     
043244,000454: 05,3767           00335                           TC       DNTMGOTO                              
043245,000455: 05,3770           34745                           CA       BIT7                                  
043246,000456: 05,3771           13512                           TCF      WO1                                   
043247,000457: 

End of include-file DOWN_TELEMETRY_PROGRAM.agc.  Parent file is MAIN.agc