Tony I will look at your problem when I get a moment. - this note is just to mention that I am involved in developing electronics for people with severe physical disabilities and may be able to swap notes generally on this subject in future. Russell McMahon From: Tony N +ADw-tonynich+AEA-HOTMAIL.COM+AD4- +AD4-I am currently putting together a project to design a flexible facilitated +AD4-communication device to help disabled people communicated - those suffering +AD4-from autism, for example. This will end up an open source design and +AD4-software. Anyway, Ive hit a snag and hope a few people will take a look for +AD4-me.... take a look at +AD4-http://members.xoom.com/tonynich/problem/index.html +AD4-I have a deep, deep suspicion it is something silly. By the way, I knew +AD4-nothing about PIC's or microcontrollers when I started this, 6 months ago. +AD4-It is only thanks to this list and certain individuals who I met via the net +AD4-that its got this far. Many thanks.