>Does anyone know where I can get information on on the specifications of
>writing a program for a parallel or serial port programmer?
  I wrote one for David Tait's programmer (parallel port). To port it to
another parallel programmer, you only need to have a look to the hardware
and modify the source to adapt logic levels. Mail me directly if you want
the source (TP7). Have a look on my page...


           |\_____/|
    ___    |[o] [o]|        ___     ___                 ___
   (o,o)   |   V   |       (o o)   (o o)               (o,o)
  <  .  >   |       |     (  V  ) (  V  )             <  .  >
----"-"----ooo---ooo--------m-m- /--m-m-----------------"-"-------

                          Luc Martin
                  luc@greco2.polytechnique.fr
        http://www.geocities.com/SiliconValley/Bay/2752