REACTCAB.TXT    Terry King                           REV 1.10 01/16/98
(FOR REACTION TIME PROGRAM USE)

BITNBYTE / BITMACHINE SOFTWARE EXTERNAL CONNECTION PIN NUMBERS
----------------------------------------------------------------------

NOTE: Cable can be made using Radio Shack #278-772 "25-conductor 'ribbon'
      cable" with R-S #276-1559 "25-position Male D-subminiature connector
      for ribbon cable". Use a bench vise or the Radio Shack tool to clamp
      the 'insulation displacement' type connector on the cable. You can
      carefully separate and 'peel' groups of wires at the far end of the
      cable to connect to LED's, switches etc.

      Note than SOME bits conveniently have a ground next to them so you
      can 'peel' a 2-wire section of the ribbon cable for one device.

BITNBYTE  PARALLEL         N O T E S :
SIGNAL    PRINTER PORT
NAME:     DB-25 PIN #    ORDER OF WIRES IN
          (RS 276-1559)  Radio Shack Ribbon Cable 278-772
--------  ------         ----------------------------------


(Unused) Pin  1       NOTE: RED STRIPE
In4      Pin 14       ____________________   NOTE: This group of pins has
Out0     Pin  2       ____________________         4 INPUT and 4 OUTPUT bits.
In5      Pin 15       ____________________         You need to connect to GND
Out1     Pin  3       ____________________         on pins 18 thru 25 for these.
In6      Pin 16       ____________________
Out2     Pin  4       ____________________
In7      Pin 17       ____________________
Out3     Pin  5       ____________________
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
GND      Pin 18       ____________________  NOTE: These groups of pins have a
Out4     Pin  6       BLINKLED    ________  convenient GND next to each one!
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
GND      Pin 19       ____________________
Out5     Pin  7       ToneGen   __________  (Beeper)
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
GND      Pin 20       ____________________
Out6     Pin  8       BotBeamLED__________ (Not used in REACTION)
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
GND      Pin 21       ____________________
Out7     Pin  9       TopBeamLED _________
0 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
GND      Pin 22       ____________________
In0      Pin 10       ____________________
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
GND      Pin 23       ____________________
In1      Pin 11       ____________________
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
GND      Pin 24       ____________________
In2      Pin 12       TopSensor___________
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
GND      Pin 25       ____________________
In3      Pin 13       BotSensor___________ (Not used in REACTION)
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