### FILE="Main.annotation"
## Copyright:   Public domain.
## Filename:    INPUT_OUTPUT_CHANNEL_BIT_DESCRIPTIONS.agc
## Purpose:     A section of Luminary revision 173.
##              It is part of the reconstructed source code for the second
##              (unflown) release of the flight software for the Lunar
##              Module's (LM) Apollo Guidance Computer (AGC) for Apollo 14.
##              The code has been recreated from a reconstructed copy of
##              Luminary 178, as well as Luminary memo 167 (revision 1).
##              It has been adapted such that the resulting bugger words
##              exactly match those specified for Luminary 173 in NASA
##              drawing 2021152N, which gives relatively high confidence
##              that the reconstruction is correct.
## Reference:   pp. 55-61
## Assembler:   yaYUL
## Contact:     Ron Burkey <info@sandroid.org>.
## Website:     www.ibiblio.org/apollo/index.html
## Mod history: 2019-09-18 MAS  Created from Luminary 178.

## Page 55

#
# *** CHANNEL DESCRIPTIONSF WORDS ARE ALLOCATED IN ERASABLE ASSIGNMENTS ***


#     CHANNEL 1    IDENTICAL TO COMPUTER REGISTER L (0001)
#

#     CHANNEL 2    IDENTICAL TO COMPUTER REGISTER Q (0002)
#

#     CHANNEL 3    HISCALAR; INPUT CHANNEL; MOST SIGNIFICANT 14 BITS FROM 33 STAGE BINARY COUNTER. SCALE
#                  FACTOR IS B23 IN CSEC, SO MAX VALUE ABOUT 23.3 HOURS AND LEAST SIGNIFICANT BIT 5.12 SECS.
#

#     CHANNEL 4    LOSCALAR; INPUT CHANNEL; NEXT MOST SIGNIFICANT 14 BITS FROM THE 33 STAGE BINARY COUNTER
#                  ASSOCIATED WITH CHANNEL 3. SCALE FACTOR IS B9 IN  CSEC. SO MAX VAL IS 5.12 SEC AND LEAST
#                  SIGNIFICANT BIT IS 1/3200 SEC. SCALE FACTOR OF D.P. WORD WITH CHANNEL 3 IS B23 CSEC.
#

#     CHANNEL 5    PYJETS; OUTPUT CHANNEL; PITCH RCS JET CONTROL.   (REACTION CONTROL SYSTEM) USES BITS 1-8.
#

#     CHANNEL 6    ROLLJETS; OUTPUT CHANNEL; ROLL RCS JET CONTROL.   (REACTION CONTROL SYSTEM) USES BIT 1-8.
#

#     CHANNEL 7    SUPERBNK; OUTPUT CHANNEL; NOT RESET BY RESTART;   FIXED EXTENSION BITS USED TO SELECT THE
#                  APPROPRIATE FIXED MEMORY BANK IF FBANK IS 30 OCTAL OR MORE. USES BITS 5-7.
#

#     CHANNEL 10   OUTO; OUTPUT CHANNEL; REGISTER USED TO TRANSMIT   LATCHING-RELAY DRIVING INFORMATION FOR
#                  THE DISPLAY SYSTEM. BITS 15-12 ARE SET TO THE ROW NUMBER (1-14 OCTAL) OF THE RELAY TO BE
#                  CHANGED AND BITS 11-1 CONTAIN THE REQUIRED SETTINGS FOR THE RELAYS IN THE ROW.
#

#     CHANNEL 11   DSALMOUT; OUTPUT CHANNEL; REGISTER WHOSE BITS ARE USED FOR ENGINE ON-OFF CONTROL AND TO
#                  DRIVE INDIVIDUAL INDICATORS OF THE DISPLAY SYSTEM. BITS 1-7 ARE A RELAYS.
#
#       BIT 1      ISS WARNING
#
#       BIT 2      LIGHT COMPUTER ACTIVITY LAMP
#
#       BIT 3      LIGHT UPLINK ACTIVITY LAMP
#
#       BIT 4      LIGHT TEMP CAUTION LAMP
#
#       BIT 5      LIGHT KEYBOARD RELEASE LAMP
#
#       BIT 6      FLASH VERB AND NOUN LAMPS
#
#       BIT 7      LIGHT OPERATOR ERROR LAMP

## Page 56
#       BIT 8      SPARE
#
#       BIT 9      TEST CONNECTOR OUTBIT
#
#       BIT 10     CAUTION RESET
#
#       BIT 11     SPARE
#
#       BIT 12     SPARE
#
#       BIT 13     ENGINE ON
#
#       BIT 14     ENGINE OFF
#
#       BIT 15     SPARE
#

#     CHANNEL 12   CHAN12; OUTPUT CHANNEL; BITS USED TO DRIVE NAVIGATION AND SPAECRAFT HARDWARE
#
#       BIT 1      ZERO RR CDU; CDU'S GIVE RRADAR INFORMATION FOR LM
#
#       BIT 2      ENABLE CDU RADAR ERROR COUNTERS
#
#       BIT 3      NOT USED
#
#       BIT 4      COARSE ALIGN ENABLE OF IMU
#
#       BIT 5      ZERO IMU CDU'S
#
#       BIT 6      ENABLE IMU ERROR COUNTER, CDU ERROR COUNTER.
#
#       BIT 7      SPARE
#
#       BIT 8      DISPLAY INERTIAL DATA
#
#       BIT 9      -PITCH GIMBAL TRIM (BELL MOTION) DESCENT ENGINE
#
#       BIT 10     +PITCH GIMBAL TRIM (BELL MOTION) DESCENT ENGINE
#
#       BIT 11     -ROLL GIMBAL TRIM (BELL MOTION) DESCENT ENGINE
#
#       BIT 12     +ROLL GIMBAL TRIM (BELL MOTION) DESCENT ENGINE
#
#       BIT 13     LR POSITION 2 COMMAND
#
#       BIT 14     ENABLE RENDESVOUS RADAR LOCK-ON;AUTO ANGLE TRACK'G
#
#       BIT 15     ISS TURN ON DELAY COMPLETE
#

## Page 57
#     CHANNEL 13   CHAN13; OUTPUT CHANNEL
#
#       BIT 1      RADAR C         PROPER SETTING OF THE A,B,C MATRIX
#       BIT 2      RADAR B         SELECTS CERTAIN RADAR
#       BIT 3      RADAR A         PARAMETERS TO BE READ.
#
#       BIT 4      RADAR ACTIVITY
#
#       BIT 5      NOT USED (CONNECTS AN ALTERNATE INPUT TO UPLINK)
#
#       BIT 6      SPARE
#
#       BIT 7      DOWNLINK TELEMETRY WORD ORDER CODE BIT
#
#       BIT 8      RHC COUNTER ENABLE (READ HAND CONTROLLER ANGLES)
#
#       BIT 9      START RHC READ INTO COUNTERS IF BIT 8 SET
#
#       BIT 10     TEST ALARMS, TEST DSKY LIGHTS
#
#       BIT 11     ENABLE STANDBY
#
#       BIT 12     RESET TRAP 31-A    ALWAYS APPEAR TO BE SET TO 0
#
#       BIT 13     RESET TRAP 31-B    ALWAYS APPEAR TO BE SET TO 0
#
#       BIT 14     RESET TRAP 32      ALWAYS APPEAR TO BE SET TO 0
#
#       BIT 15     ENABLE T6 RUPT
#

#     CHANNEL 14   CHAN14; OUTPUT CHANNEL; USED TO CONTROL COMPUTER  COUNTER CELLS (CDU,GYRO,SPACECRAFT FUNC.
#
#       BIT 1      OUTLINK ACTIVITY (NOT USED)
#
#       BIT 2      ALTITUDE RATE OR ALTITIDE SELECTOR
#
#       BIT 3      ALTITUDE METER ACTIVITY
#
#       BIT 4      THRUST DRIVE ACTIVITY FOR DESCENT ENGINE
#
#       BIT 5      SPARE
#
#       BIT 6      GYRO ENABLE POWER FOR PULSES
#
#       BIT 7      GYRO SELECT B    PAIR OF BITS IDENTIFIES AXIS OF -
#       BIT 8      GYRO SELECT A    GYRO SYSTEM TO BE TORQUED.
#
#       BIT 9      GYRO TORQUING COMMAND IN NEGATIVE DIRECTION
#
## Page 58
#       BIT 10     GYRO ACTIVITY
#
#       BIT 11     DRIVE CDU S
#
#       BIT 12     DRIVE CDU T
#
#       BIT 13     DRIVE CDU Z
#
#       BIT 14     DRIVE CDU Y
#
#       BIT 15     DRIVE CDU X
#

#     CHANNEL 15   MNKEYIN; INPUT CHANNEL;KEY CODE INPUT FROM KEYBOARD OF DSKY, SENSED BY PROGRAM WHEN
#                  PROGRAM INTERRUPT #5 IS RECEIVED. USES BITS 5-1
#

#     CHANNEL 16   NAVKEYIN; INPUT CHANNEL; OPTICS MARK INFORMATION AND NAVIGA ION PANEL DSKY (CM) OR THRUST
#                  CONTROL (LM) SENSED BY PROGRAM WHEN PROGRAM INTER-RUPT #6 IS RECEIVED.  USES BITS 3-7 ONLY.
#
#       BIT 1      NOT ASSIGNED
#
#       BIT 2      NOT ASSIGNED
#
#       BIT 3      OPTICS X-AXIS MARK SIGNAL FOR ALIGN OPTICAL TSCOPE
#
#       BIT 4      OPTICS Y-AXIS MARK SIGNAL FOR AOT
#
#       BIT 5      OPTICS MARK REJECT SIGNAL
#
#       BIT 6      DESCENT+ ; CREW DESIRED SLOWING RATE OF DESCENT
#
#       BIT 7      DESCENT- ; CREW DESIRED SPEEDING UP RATE OF D'CENT
#

#     NOTE: ALL BITS IN CHANNELS 30-33 ARE INVERTED AS SENSED BY THE  PROGRAM, SO THAT A VALUE OF ZERO MEANS
#     THAT THE INDICATED SIGNAL IS PRESENT.
#

#     CHANNEL 30   INPUT CHANNEL
#
#       BIT 1      ABORT WITH DESCENT STAGE
#
#       BIT 2         UNUSED
#
#       BIT 3      ENGINE ARMED SIGNAL
#
#       BIT 4      ABORT WITH ASCENT ENGINE STAGE
#
#       BIT 5      AUTO THROTTLE; COMPUTER CONTROL OF DESCENT ENGINE
## Page 59
#       BIT 6      DISPLAY INERTIAL DATA
#
#       BIT 7      RR CDU FAIL
#
#       BIT 8      SPARE
#
#       BIT 9      IMU OPERATE WITH NO MALFUNCTION
#
#       BIT 10     LM COMPUTER (NOT AGS) HAS CONTROL OF LM
#
#       BIT 11     IMU CAGE COMMAND TO DRIVE IMU GIMBAL ANGLES TO 0.
#
#       BIT 12     IMU CDU FAIL (MALFUNCTION OF IMU CDU,S)
#
#       BIT 13     IMU FAIL (MALFUNCTION OF IMU STABILIZATION LOOPS)
#
#       BIT 14     ISS TURN ON REQUESTED
#
#       BIT 15     TEMPERATURE OF STABLE MEMBER WITHIN DESIGN LIMITS
#

#     CHANNEL 31   INPUT CHANNEL; BITS ASSOCIATED WITH THE ATTITUDE  CONTROLLER, TRANSLATIONAL CONTROLLER,
#                  AND SPACECRAFT ATTITUDE CONTROL; USED BY RCS DAP
#
#       BIT 1      ROTATION (BY RHC) COMMANDED IN POSITIVE PITCH DIRECTION; MUST BE IN MINIMUM IMPULSE MODE.
#                  ALSO POSITIVE ELEVATION CHANGE FOR LANDING POINT  DESIGNATOR
#
#       BIT 2      AS BIT 1 EXCEPT NEGATIVE PITCH AND ELEVATION
#
#       BIT 3      ROTATION (BY RHC) COMMANDED IN POSITIVE YAW DIRECTION; MUST BE IN MINUMUM IMPULSE MODE.
#
#       BIT 4      AS BIT 3 EXCEPT NEGATIVE YAW
#
#       BIT 5      ROTATION (BY RHC) COMMANDED IN POSITIVE ROLL DIRECTION; MUST BE IN MINIMUM IMPULSE MODE.
#                  ALSO POSITIVE AZIMUTH CHANGE FOR LANDING POINT DESIGNATOR
#
#       BIT 6      AS BIT 5 EXCEPT NEGATIVE ROLL AND AZIMUTH
#
#       BIT 7      TRANSLATION IN +X DIRECTION COMMANDED BY THC
#
#       BIT 8      TRANSLATION IN -X DIRECTION COMMANDED BY THC
#
#       BIT 9      TRANSLATION IN +Y DIRECTION COMMANDED BY THC
#
#       BIT 10     TRANSLATION IN -Y DIRECTION COMMANDED BY THC
#
#       BIT 11     TRANSLATION IN +Z DIRECTION COMMANDED BY THC
#
#       BIT 12     TRANSLATION IN -Z DIRECTION COMMANDED BY THC
## Page 60
#
#       BIT 13     ATTITUDE HOLD MODE ON SCS MODE CONTROL SWITCH
#
#       BIT 14     AUTO STABILIZATION OF ATTITUDE ON SCS MODE SWITCH
#
#       BIT 15     ATTITUDE CONTROL OUT OF DETENT (RHC NOT IN NEUTRAL
#

#     CHANNEL 32      INPUT CHANNEL.
#
#       BIT 1         THRUSTERS 2 & 4 DISABLED BY CREW
#
#       BIT 2         THRUSTERS 5 & 8 DISABLED BY CREW
#
#       BIT 3         THRUSTERS 1 & 3 DISABLED BY CREW
#
#       BIT 4         THRUSTERS 6 & 7 DISABLED BY CREW
#
#       BIT 5         THRUSTERS 14 & 16 DISABLED BY CREW
#
#       BIT 6         THRUSTERS 13 & 15 DISABLED BY CREW
#
#       BIT 7         THRUSTERS 9  & 12 DISABLED BY CREW
#
#       BIT 8         THRUSTERS 10 & 11 DISABLED BY CREW
#
#       BIT 9         DESCENT ENGINE GIMBALS DISABLED BY CREW
#
#       BIT 10        APPARENT DESCENT ENGINE GIMBAL FAILURE
#
#       BIT 14     INDICATES PROCEED KEY IS DEPRESSED
#

#     CHANNEL 33   CHAN33; INPUT CHANNEL; FOR HARDWARE STATUS AND COMMAND INFORMATION. BITS 15-11 ARE FLIP-
#                  FLOP BITS RESET BY A CHANNEL "WRITE" COMMAND THAT ARE RESET BY A RESTART & BY T4RUPT LOOP.
#
#       BIT 1      SPARE
#
#       BIT 2      RR AUTO-POWER ON
#
#       BIT 3      RR RANGE LOW SCALE
#
#       BIT 4      RR DATA GOOD
#
#       BIT 5      LR RANGE DATA GOOD
#
#       BIT 6      LR POS1
#
#       BIT 7      LR POS2
#
## Page 61
#       BIT 8      LR VEL DATA GOOD
#
#       BIT 9      LR RANGE LOW SCALE
#
#       BIT 10     BLOCK UPLINK INPUT
#
#       BIT 11     UPLINK TOO FAST
#
#       BIT 12     DOWNLINK TOO FAST
#
#       BIT 13     PIPA FAIL
#
#       BIT 14     WARNING OF REPEATED ALARMS: RESTART,COUNTER FAIL, VOLTAGE FAIL,AND SCALAR DOUBLE.
#
#       BIT 15     LGC OSCILLATOR STOPPED
#

#    CHANNEL 34    DNT M1; OUTPUT CHANNEL; DOWNLINK 1  FIRST OF TWO WORDS SERIALIZATION.
#    CHANNEL 35    DNT M2; OUTPUT CHANNEL DOWNLINK 2 SOCOND OF TWO   WORDS SERIALIZATION.