Hi, i've included HW breakpoints to my library that lets you debug an ARM7TDMI via the parallel port. It can be found at: http://www.s.netic.de/tmohr/pppcb-0.2.0.tar.gz Also, single stepping is added, but doesn't yet work reliably. I'll be on holiday for the next week, emails won't be answered in that time. Best regards, Torsten.