Source Code

These source-code files derive from a printout of Luminary 210 (Apollo 15-17 Lunar Module guidance computer program), from the personal library of original AGC developer Don Eyles, digitally photographed at archive.org, financially sponsored by Jim Lawton, and transcribed to source code by a team of volunteers. This colorized, syntax-highlighted form was created by assembling that transcribed source code. Note that the full page images are available on the Virtual AGC project page at archive.org, while reduced-size images are presented at the VirtualAGC project website. Report or fix any transcription errors at the Virtual AGC project code repository.

Notations on the program listing read, in part:

	GAP: ASSEMBLE REVISION 210 OF AGC PROGRAM LUMINARY 
	BY NASA 2021112-161 17:11 MAR. 19,1971
Note that the date is the date of the printout, not the date of the program revision.

002112,000002:                                                                                                  ## Copyright:   Public domain.
002113,000003:                                                                                                  ## Filename:    INPUT_OUTPUT_CHANNEL_BIT_DESCRIPTIONS.agc
002114,000004:                                                                                                  ## Purpose:     A section of Luminary revision 210.
002115,000005:                                                                                                  ##              It is part of the source code for the Lunar Module's (LM)
002116,000006:                                                                                                  ##              Apollo Guidance Computer (AGC) for Apollo 15-17.
002117,000007:                                                                                                  ##              This file is intended to be a faithful transcription, except
002118,000008:                                                                                                  ##              that the code format has been changed to conform to the
002119,000009:                                                                                                  ##              requirements of the yaYUL assembler rather than the
002120,000010:                                                                                                  ##              original YUL assembler.
002121,000011:                                                                                                  ## Reference:   pp. 56-62
002122,000012:                                                                                                  ## Assembler:   yaYUL
002123,000013:                                                                                                  ## Contact:     Ron Burkey <info@sandroid.org>.
002124,000014:                                                                                                  ## Website:     www.ibiblio.org/apollo/index.html
002125,000015:                                                                                                  ## Mod history: 2016-11-17 JL   Created from Luminary131 version.
002126,000016:                                                                                                  ##              2016-11-17 HG   Transcribed
002127,000017:                                                                                                  ##              2016-12-15 RSB  Proofed comment text with octopus/ProoferComments,
002128,000018:                                                                                                  ##                              and corrected the errors found.
002129,000019:                                                                                                  ##              2017-03-02 RSB  OUT0 --> OUTO.
002130,000020:                                                                                                  ##              2017-03-15 RSB  Comment-text fixes identified in 5-way
002131,000021:                                                                                                  ##                              side-by-side diff of Luminary 69/99/116/131/210.
002132,000022: 

Page 56

002134,000024: 
002135,000025:                                                                                                  #  *** CHANNEL DESCRIPTIONSF WORDS ARE ALLOCATED IN ERASABLE ASSIGNMENTS ***
002136,000026: 
002137,000027:                                                                                                  #      CHANNEL 1    IDENTICAL TO COMPUTER REGISTER L (0001)
002138,000028: 
002139,000029:                                                                                                  #      CHANNEL 2    IDENTICAL TO COMPUTER REGISTER Q (0002)
002140,000030: 
002141,000031:                                                                                                  #      CHANNEL 3    HISCALAR; INPUT CHANNEL; MOST SIGNIFICANT 14 BITS FROM 33 STAGE BINARY COUNTER. SCALE
002142,000032:                                                                                                  #                   FACTOR IS B23 IN CSEC, SO MAX VALUE ABOUT 23.3 HOURS AND LEAST SIGNIFICANT BIT 5.12 SECS.
002143,000033: 
002144,000034:                                                                                                  #      CHANNEL 4    LOSCALAR; INPUT CHANNEL; NEXT MOST SIGNIFICANT 14 BITS FROM THE 33 STAGE BINARY COUNTER
002145,000035:                                                                                                  #                   ASSOCIATED WITH CHANNEL 3. SCALE FACTOR IS B9 IN  CSEC. SO MAX VAL IS 5.12 SEC AND LEAST
002146,000036:                                                                                                  #                   SIGNIFICANT BIT IS 1/3200 SEC. SCALE FACTOR OF D.P. WORD WITH CHANNEL 3 IS B23 CSEC.
002147,000037: 
002148,000038:                                                                                                  #      CHANNEL 5    PYJETS; OUTPUT CHANNEL; PITCH RCS JET CONTROL.  (REACTION CONTROL SYSTEM) USES BITS 1-8.
002149,000039: 
002150,000040: 
002151,000041:                                                                                                  #      CHANNEL 6    ROLLJETS; OUTPUT CHANNEL; ROLL RCS JET CONTROL.  (REACTION CONTROL SYSTEM) USES BIT 1-8.
002152,000042: 
002153,000043: 
002154,000044:                                                                                                  #      CHANNEL 7    SUPERBNK; OUTPUT CHANNEL; NOT RESET BY RESTART;   FIXED EXTENSION BITS USED TO SELECT THE
002155,000045:                                                                                                  #                   APPROPRIATE FIXED MEMORY BANK IF FBANK IS 30 OCTAL OR MORE. USES BITS 5-7.
002156,000046: 
002157,000047: 
002158,000048:                                                                                                  #      CHANNEL 10   OUTO; OUTPUT CHANNEL; REGISTER USED TO TRANSMIT   LATCHING-RELAY DRIVING INFORMATION FOR
002159,000049:                                                                                                  #                   THE DISPLAY SYSTEM. BITS 15-12 ARE SET TO THE ROW NUMBER (1-14 OCTAL) OF THE RELAY TO BE
002160,000050:                                                                                                  #                   CHANGED AND BITS 11-1 CONTAIN THE REQUIRED SETTINGS FOR THE RELAYS IN THE ROW.
002161,000051: 
002162,000052: 
002163,000053:                                                                                                  #      CHANNEL 11   DSALMOUT; OUTPUT CHANNEL; REGISTER WHOSE BITS ARE USED FOR ENGINE ON-OFF CONTROL AND TO
002164,000054:                                                                                                  #                   DRIVE INDIVIDUAL INDICATORS OF THE DISPLAY SYSTEM. BITS 1-7 ARE A RELAYS.
002165,000055: 
002166,000056:                                                                                                  #        BIT 1      ISS WARNING
002167,000057: 
002168,000058:                                                                                                  #        BIT 2      LIGHT COMPUTER ACTIVITY LAMP
002169,000059: 
002170,000060:                                                                                                  #        BIT 3      LIGHT UPLINK ACTIVITY LAMP
002171,000061: 
002172,000062:                                                                                                  #        BIT 4      LIGHT TEMP CAUTION LAMP
002173,000063: 
002174,000064:                                                                                                  #        BIT 5      LIGHT KEYBOARD RELEASE LAMP
002175,000065: 
002176,000066:                                                                                                  #        BIT 6      FLASH VERB AND NOUN LAMPS
002177,000067: 
002178,000068:                                                                                                  #        BIT 7      LIGHT OPERATOR ERROR LAMP
002179,000069: 

Page 57

002181,000071:                                                                                                  #        BIT 8      SPARE
002182,000072: 
002183,000073:                                                                                                  #        BIT 9      TEST CONNECTOR OUTBIT
002184,000074: 
002185,000075:                                                                                                  #        BIT 10     CAUTION RESET
002186,000076: 
002187,000077:                                                                                                  #        BIT 11     SPARE
002188,000078: 
002189,000079:                                                                                                  #        BIT 12     SPARE
002190,000080: 
002191,000081:                                                                                                  #        BIT 13     ENGINE ON
002192,000082: 
002193,000083:                                                                                                  #        BIT 14     ENGINE OFF
002194,000084: 
002195,000085:                                                                                                  #        BIT 15     SPARE
002196,000086: 
002197,000087: 
002198,000088:                                                                                                  #      CHANNEL 12   CHAN12; OUTPUT CHANNEL; BITS USED TO DRIVE NAVIGATION AND SPAECRAFT HARDWARE
002199,000089: 
002200,000090:                                                                                                  #        BIT 1      ZERO RR CDU; CDU'S GIVE RRADAR INFORMATION FOR LM
002201,000091: 
002202,000092:                                                                                                  #        BIT 2      ENABLE CDU RADAR ERROR COUNTERS
002203,000093: 
002204,000094:                                                                                                  #        BIT 3      NOT USED
002205,000095: 
002206,000096:                                                                                                  #        BIT 4      COARSE ALIGN ENABLE OF IMU
002207,000097: 
002208,000098:                                                                                                  #        BIT 5      ZERO IMU CDU'S
002209,000099: 
002210,000100:                                                                                                  #        BIT 6      ENABLE IMU ERROR COUNTER, CDU ERROR COUNTER.
002211,000101: 
002212,000102:                                                                                                  #        BIT 7      SPARE
002213,000103: 
002214,000104:                                                                                                  #        BIT 8      DISPLAY INERTIAL DATA
002215,000105: 
002216,000106:                                                                                                  #        BIT 9      -PITCH GIMBAL TRIM (BELL MOTION) DESCENT ENGINE
002217,000107: 
002218,000108:                                                                                                  #        BIT 10     +PITCH GIMBAL TRIM (BELL MOTION) DESCENT ENGINE
002219,000109: 
002220,000110:                                                                                                  #        BIT 11     -ROLL GIMBAL TRIM (BELL MOTION) DESCENT ENGINE
002221,000111: 
002222,000112:                                                                                                  #        BIT 12     +ROLL GIMBAL TRIM (BELL MOTION) DESCENT ENGINE
002223,000113: 
002224,000114:                                                                                                  #        BIT 13     LR POSITION 2 COMMAND
002225,000115: 
002226,000116:                                                                                                  #        BIT 14     ENABLE RENDESVOUS RADAR LOCK-ON; AUTO ANGLE TRACK'G
002227,000117: 
002228,000118:                                                                                                  #        BIT 15     ISS TURN ON DELAY COMPLETE
002229,000119: 
002230,000120: 

Page 58

002232,000122:                                                                                                  #      CHANNEL 13   CHAN13; OUTPUT CHANNEL
002233,000123: 
002234,000124:                                                                                                  #        BIT 1      RADAR C         PROPER SETTING OF THE A,B,C MATRIX
002235,000125:                                                                                                  #        BIT 2      RADAR B         SELECTS CERTAIN RADAR
002236,000126:                                                                                                  #        BIT 3      RADAR A         PARAMETERS TO BE READ.
002237,000127: 
002238,000128:                                                                                                  #        BIT 4      RADAR ACTIVITY
002239,000129: 
002240,000130:                                                                                                  #        BIT 5      NOT USED (CONNECTS AN ALTERNATE INPUT TO UPLINK)
002241,000131: 
002242,000132:                                                                                                  #        BIT 6      SPARE
002243,000133: 
002244,000134:                                                                                                  #        BIT 7      DOWNLINK TELEMETRY WORD ORDER CODE BIT
002245,000135: 
002246,000136:                                                                                                  #        BIT 8      RHC COUNTER ENABLE (READ HAND CONTROLLER ANGLES)
002247,000137: 
002248,000138:                                                                                                  #        BIT 9      START RHC READ INTO COUNTERS IF BIT 8 SET
002249,000139: 
002250,000140:                                                                                                  #        BIT 10     TEST ALARMS, TEST DSKY LIGHTS
002251,000141: 
002252,000142:                                                                                                  #        BIT 11     ENABLE STANDBY
002253,000143: 
002254,000144:                                                                                                  #        BIT 12     RESET TRAP 31-A    ALWAYS APPEAR TO BE SET TO 0
002255,000145: 
002256,000146:                                                                                                  #        BIT 13     RESET TRAP 31-B    ALWAYS APPEAR TO BE SET TO 0
002257,000147: 
002258,000148:                                                                                                  #        BIT 14     RESET TRAP 32      ALWAYS APPEAR TO BE SET TO 0
002259,000149: 
002260,000150:                                                                                                  #        BIT 15     ENABLE T6 RUPT
002261,000151: 
002262,000152: 
002263,000153:                                                                                                  #      CHANNEL 14   CHAN14; OUTPUT CHANNEL; USED TO CONTROL COMPUTER  COUNTER CELLS (CDU,GYRO,SPACECRAFT FUNC.
002264,000154: 
002265,000155:                                                                                                  #        BIT 1      OUTLINK ACTIVITY (NOT USED)
002266,000156: 
002267,000157:                                                                                                  #        BIT 2      ALTITUDE RATE OR ALTITIDE SELECTOR
002268,000158: 
002269,000159:                                                                                                  #        BIT 3      ALTITUDE METER ACTIVITY
002270,000160: 
002271,000161:                                                                                                  #        BIT 4      THRUST DRIVE ACTIVITY FOR DESCENT ENGINE
002272,000162: 
002273,000163:                                                                                                  #        BIT 5      SPARE
002274,000164: 
002275,000165:                                                                                                  #        BIT 6      GYRO ENABLE POWER FOR PULSES
002276,000166: 
002277,000167:                                                                                                  #        BIT 7      GYRO SELECT B    PAIR OF BITS IDENTIFIES AXIS OF -
002278,000168:                                                                                                  #        BIT 8      GYRO SELECT A    GYRO SYSTEM TO BE TORQUED.
002279,000169: 
002280,000170:                                                                                                  #        BIT 9      GYRO TORQUING COMMAND IN NEGATIVE DIRECTION
002281,000171: 
002282,000172: 

Page 59

002284,000174:                                                                                                  #        BIT 10     GYRO ACTIVITY
002285,000175: 
002286,000176:                                                                                                  #        BIT 11     DRIVE CDU S
002287,000177: 
002288,000178:                                                                                                  #        BIT 12     DRIVE CDU T
002289,000179: 
002290,000180:                                                                                                  #        BIT 13     DRIVE CDU Z
002291,000181: 
002292,000182:                                                                                                  #        BIT 14     DRIVE CDU Y
002293,000183: 
002294,000184:                                                                                                  #        BIT 15     DRIVE CDU X
002295,000185: 
002296,000186: 
002297,000187:                                                                                                  #      CHANNEL 15   MNKEYIN; INPUT CHANNEL;KEY CODE INPUT FROM KEYBOARD OF DSKY, SENSED BY PROGRAM WHEN
002298,000188:                                                                                                  #                   PROGRAM INTERRUPT #5 IS RECEIVED. USES BITS 5-1
002299,000189: 
002300,000190: 
002301,000191:                                                                                                  #      CHANNEL 16   NAVKEYIN; INPUT CHANNEL; OPTICS MARK INFORMATION AND NAVIGA ION PANEL DSKY (CM) OR THRUST
002302,000192:                                                                                                  #                   CONTROL (LM) SENSED BY PROGRAM WHEN PROGRAM INTER-RUPT #6 IS RECEIVED.  USES BITS 3-7 ONLY.
002303,000193: 
002304,000194:                                                                                                  #        BIT 1      NOT ASSIGNED
002305,000195: 
002306,000196:                                                                                                  #        BIT 2      NOT ASSIGNED
002307,000197: 
002308,000198:                                                                                                  #        BIT 3      OPTICS X-AXIS MARK SIGNAL FOR ALIGN OPTICAL TSCOPE
002309,000199: 
002310,000200:                                                                                                  #        BIT 4      OPTICS Y-AXIS MARK SIGNAL FOR AOT
002311,000201: 
002312,000202:                                                                                                  #        BIT 5      OPTICS MARK REJECT SIGNAL
002313,000203: 
002314,000204:                                                                                                  #        BIT 6      DESCENT+ ; CREW DESIRED SLOWING RATE OF DESCENT
002315,000205: 
002316,000206:                                                                                                  #        BIT 7      DESCENT- ; CREW DESIRED SPEEDING UP RATE OF D'CENT
002317,000207: 
002318,000208: 
002319,000209:                                                                                                  #      NOTE: ALL BITS IN CHANNELS 30-33 ARE INVERTED AS SENSED BY THE PROGRAM, SO THAT A VALUE OF ZERO MEANS
002320,000210:                                                                                                  #      THAT THE INDICATED SIGNAL IS PRESENT.
002321,000211: 
002322,000212: 
002323,000213:                                                                                                  #      CHANNEL 30   INPUT CHANNEL
002324,000214: 
002325,000215:                                                                                                  #        BIT 1      ABORT WITH DESCENT STAGE
002326,000216: 
002327,000217:                                                                                                  #        BIT 2         UNUSED
002328,000218: 
002329,000219:                                                                                                  #        BIT 3      ENGINE ARMED SIGNAL
002330,000220: 
002331,000221:                                                                                                  #        BIT 4      ABORT WITH ASCENT ENGINE STAGE
002332,000222: 
002333,000223:                                                                                                  #        BIT 5      AUTO THROTTLE; COMPUTER CONTROL OF DESCENT ENGINE
002334,000224: 

Page 60

002336,000226:                                                                                                  #        BIT 6      DISPLAY INERTIAL DATA
002337,000227: 
002338,000228:                                                                                                  #        BIT 7      RR CDU FAIL
002339,000229: 
002340,000230:                                                                                                  #        BIT 8      SPARE
002341,000231: 
002342,000232:                                                                                                  #        BIT 9      IMU OPERATE WITH NO MALFUNCTION
002343,000233: 
002344,000234:                                                                                                  #        BIT 10     LM COMPUTER (NOT AGS) HAS CONTROL OF LM
002345,000235: 
002346,000236:                                                                                                  #        BIT 11     IMU CAGE COMMAND TO DRIVE IMU GIMBAL ANGLES TO 0.
002347,000237: 
002348,000238:                                                                                                  #        BIT 12     IMU CDU FAIL (MALFUNCTION OF IMU CDU,S)
002349,000239: 
002350,000240:                                                                                                  #        BIT 13     IMU FAIL (MALFUNCTION OF IMU STABILIZATION LOOPS)
002351,000241: 
002352,000242:                                                                                                  #        BIT 14     ISS TURN ON REQUESTED
002353,000243: 
002354,000244:                                                                                                  #        BIT 15     TEMPERATURE OF STABLE MEMBER WITHIN DESIGN LIMITS
002355,000245: 
002356,000246: 
002357,000247:                                                                                                  #      CHANNEL 31   INPUT CHANNEL; BITS ASSOCIATED WITH THE ATTITUDE  CONTROLLER, TRANSLATIONAL CONTROLLER,
002358,000248:                                                                                                  #                   AND SPACECRAFT ATTITUDE CONTROL; USED BY RCS DAP
002359,000249: 
002360,000250:                                                                                                  #        BIT 1      ROTATION (BY RHC) COMMANDED IN POSITIVE PITCH DIRECTION; MUST BE IN MINIMUM IMPULSE MODE.
002361,000251:                                                                                                  #                   ALSO POSITIVE ELEVATION CHANGE FOR LANDING POINT  DESIGNATOR
002362,000252: 
002363,000253:                                                                                                  #        BIT 2      AS BIT 1 EXCEPT NEGATIVE PITCH AND ELEVATION
002364,000254: 
002365,000255:                                                                                                  #        BIT 3      ROTATION (BY RHC) COMMANDED IN POSITIVE YAW DIRECTION; MUST BE IN MINUMUM IMPULSE MODE.
002366,000256: 
002367,000257:                                                                                                  #        BIT 4      AS BIT 3 EXCEPT NEGATIVE YAW
002368,000258: 
002369,000259:                                                                                                  #        BIT 5      ROTATION (BY RHC) COMMANDED IN POSITIVE ROLL DIRECTION; MUST BE IN MINIMUM IMPULSE MODE.
002370,000260:                                                                                                  #                   ALSO POSITIVE AZIMUTH CHANGE FOR LANDING POINT DESIGNATOR
002371,000261: 
002372,000262:                                                                                                  #        BIT 6      AS BIT 5 EXCEPT NEGATIVE ROLL AND AZIMUTH
002373,000263: 
002374,000264:                                                                                                  #        BIT 7      TRANSLATION IN +X DIRECTION COMMANDED BY THC
002375,000265: 
002376,000266:                                                                                                  #        BIT 8      TRANSLATION IN -X DIRECTION COMMANDED BY THC
002377,000267: 
002378,000268:                                                                                                  #        BIT 9      TRANSLATION IN +Y DIRECTION COMMANDED BY THC
002379,000269: 
002380,000270:                                                                                                  #        BIT 10     TRANSLATION IN -Y DIRECTION COMMANDED BY THC
002381,000271: 
002382,000272:                                                                                                  #        BIT 11     TRANSLATION IN +Z DIRECTION COMMANDED BY THC
002383,000273: 
002384,000274:                                                                                                  #        BIT 12     TRANSLATION IN -Z DIRECTION COMMANDED BY THC
002385,000275: 

Page 61

002387,000277: 
002388,000278:                                                                                                  #        BIT 13     ATTITUDE HOLD MODE ON SCS MODE CONTROL SWITCH
002389,000279: 
002390,000280:                                                                                                  #        BIT 14     AUTO STABILIZATION OF ATTITUDE ON SCS MODE SWITCH
002391,000281: 
002392,000282:                                                                                                  #        BIT 15     ATTITUDE CONTROL OUT OF DETENT (RHC NOT IN NEUTRAL
002393,000283: 
002394,000284: 
002395,000285:                                                                                                  #      CHANNEL 32      INPUT CHANNEL.
002396,000286: 
002397,000287:                                                                                                  #        BIT 1         THRUSTERS 2 & 4 DISABLED BY CREW
002398,000288: 
002399,000289:                                                                                                  #        BIT 2         THRUSTERS 5 & 8 DISABLED BY CREW
002400,000290: 
002401,000291:                                                                                                  #        BIT 3         THRUSTERS 1 & 3 DISABLED BY CREW
002402,000292: 
002403,000293:                                                                                                  #        BIT 4         THRUSTERS 6 & 7 DISABLED BY CREW
002404,000294: 
002405,000295:                                                                                                  #        BIT 5         THRUSTERS 14 & 16 DISABLED BY CREW
002406,000296: 
002407,000297:                                                                                                  #        BIT 6         THRUSTERS 13 & 15 DISABLED BY CREW
002408,000298: 
002409,000299:                                                                                                  #        BIT 7         THRUSTERS 9 & 12 DISABLED BY CREW
002410,000300: 
002411,000301:                                                                                                  #        BIT 8         THRUSTERS 10 & 11 DISABLED BY CREW
002412,000302: 
002413,000303:                                                                                                  #        BIT 9         DESCENT ENGINE GIMBALS DISABLED BY CREW
002414,000304: 
002415,000305:                                                                                                  #        BIT 10        APPARENT DESCENT ENGINE GIMBAL FAILURE
002416,000306: 
002417,000307:                                                                                                  #        BIT 14     INDICATES PROCEED KEY IS DEPRESSED
002418,000308: 
002419,000309: 
002420,000310:                                                                                                  #      CHANNEL 33   CHAN33; INPUT CHANNEL; FOR HARDWARE STATUS AND COMMAND INFORMATION. BITS 15-11 ARE FLIP-
002421,000311:                                                                                                  #                   FLOP BITS RESET BY A CHANNEL "WRITE" COMMAND THAT ARE RESET BY A RESTART & BY T4RUPT LOOP.
002422,000312: 
002423,000313:                                                                                                  #        BIT 1      SPARE
002424,000314: 
002425,000315:                                                                                                  #        BIT 2      RR AUTO-POWER ON
002426,000316: 
002427,000317:                                                                                                  #        BIT 3      RR RANGE LOW SCALE
002428,000318: 
002429,000319:                                                                                                  #        BIT 4      RR DATA GOOD
002430,000320: 
002431,000321:                                                                                                  #        BIT 5      LR RANGE DATA GOOD
002432,000322: 
002433,000323:                                                                                                  #        BIT 6      LR POS1
002434,000324: 
002435,000325:                                                                                                  #        BIT 7      LR POS2
002436,000326: 
002437,000327: 
002438,000328: 

Page 62

002440,000330:                                                                                                  #        BIT 8      LR VEL DATA GOOD
002441,000331: 
002442,000332:                                                                                                  #        BIT 9      LR RANGE LOW SCALE
002443,000333: 
002444,000334:                                                                                                  #        BIT 10     BLOCK UPLINK INPUT
002445,000335: 
002446,000336:                                                                                                  #        BIT 11     UPLINK TOO FAST
002447,000337: 
002448,000338:                                                                                                  #        BIT 12     DOWNLINK TOO FAST
002449,000339: 
002450,000340:                                                                                                  #        BIT 13     PIPA FAIL
002451,000341: 
002452,000342:                                                                                                  #        BIT 14     WARNING OF REPEATED ALARMS: RESTART,COUNTER FAIL, VOLTAGE FAIL,AND SCALAR DOUBLE.
002453,000343: 
002454,000344:                                                                                                  #        BIT 15     LGC OSCILLATOR STOPPED
002455,000345: 
002456,000346: 
002457,000347:                                                                                                  #     CHANNEL 34    DNT M1; OUTPUT CHANNEL; DOWNLINK 1  FIRST OF TWO WORDS SERIALIZATION.
002458,000348:                                                                                                  #     CHANNEL 35    DNT M2; OUTPUT CHANNEL DOWNLINK 2 SOCOND OF TWO   WORDS SERIALIZATION.

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