September 15, 1995



Cable Descriptions for BASIC Stamp I and II



BASIC Stamp I (PC parallel port):

  Parallel   Stamp D Pin   Stamp D    BS1-IC Pin     BS1-IC      Notes
  ---------------------------------------------------------------------------
     25          1          GND           2          GND/Vss     <<< on Stamp
     11          2          BUSY          3          PCO
      2          3          DATA          4          PCI



BASIC Stamp II (PC serial port DB9 connector):

  Serial   Stamp Pin   Stamp Name       Notes
  ---------------------------------------------------------------------------
     2         1          TX            Serial out from Stamp II
     3         2          RX            Serial in to Stamp II
     4         3          ATN           Serial attention line
     5         4          GND           Serial ground


Stamp II note:  for the Stamp II software to find the Stamp II on any serial
port, you must connect DSR (DB9 pin 6) to RTS (DB9 pin 7) on your PC's serial
port.  Otherwise, the software will give a "Hardware not Found" error.  If this
is a problem, you can tell the software which serial port to use from the
DOS command-line, as follows:

     STAMP2 /x

Where "x" is the serial port number (1-3).

Please note that the Stamp II Carrier Board makes the DSR-to-RTS connection, so
this error should not occur if you're using the carrier board.
