Hi Tony, best page I have found is at http://www.beyondlogic.org/pic/icd.htm You could also disassembly and study the code inserted at 0xF00 (0x1F00) by the ICD in the target part. Josef >Is there documentation available on how the F87x series debug mode >works? > >I don't mean the MPLAB ICD code, just how the chip deals with it. ======================================================================= Electronical devices for chemical laboratory, custom electronics design ----------------------------------------------------------------------- Snail Instruments Josef Hanzal, M. S. Vojanova 615 phone/fax: +420-311-624433 266 01 Beroun e-mail: snail@iol.cz Czech Republic URL: http://www.vitrum.cz/snail/ GPS: 49deg58'28" North, 14deg 4'35" East ======================================================================= -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu