Check out Circuit Cellar INK No 89 December 1997
Francis Deck designed and built one that runs on a PC and can sample at over
20 MHZ.  He used a FIFO memory as a fast data cache.  He also wrote some VB
code for the interface. This seemed like a good project.

-----Original Message-----
From: Leo [mailto:cacciavite@BIGFOOT.COM]
Sent: Wednesday, August 25, 1999 2:33 AM
To: PICLIST@MITVMA.MIT.EDU
Subject: PC logic analizer


Hi PICer friends,

To analize the real reaction / interaction of PWM, interrupt, counter and so
on, is not possible to use the MPLAB environment.

I'm, thinking that the today PC at 400 Mhz and over, with a bidirectional
parallel printer port should be a nice platform to build a simple and most
economic logic analazer.

Anyone have been made some experience about this...


Ciao

Leo