This project shows how to build the software and hardware of a USB logic analyser based Win32 systems. It has 8 digital inputs and features a 20MS/s sample rate. Check in depth design of this analyzer on the link below. Professor Mark Csele’s writes: [via]
Presented is both the hardware and software for a Win-32 based Logic Analyzer. This is an updated version of an old project which featured a front-end originally written is BASIC and using the parallel port on a PC for communications – the new version presented here uses a multithreaded Win-32 front-end and a native USB interface.
Win-32 based USB Logic Analyzer - [Link]