> I think it might be time for me to build a Annirak-built logic analyser > (Annirak and Brendan are one and the same, incidentally) It would > make a good use of the 4MHz 877 I've got kicking around It's not too difficult, although I had to wait until I had a scope fast enough to get the circuit running properly. It's based on an F628 running at 3.6864MHz (all I had to hand at the time) which does some simple line controlling and RS232 back to the PC. The data collection is done by a dividable 40MHz clock driving 32k fast cache RAM via address drivers / latches. It could use a heap of improvement, as time permits, and I think it would be worth something to others as a complete project -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.