With the ability to read & write to program memory and manipulate the stack the 18F is powerful enough to support the GDB protocol. I shall carry on working on it and see how it goes. Will post results to this list. cheers Mark -----Original Message----- From: pic microcontroller discussion list [mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Peter L. Peres Sent: 25 October 2002 19:17 To: PICLIST@MITVMA.MIT.EDU Subject: Re: [PIC]: GDB On Fri, 25 Oct 2002, Michael Rigby-Jones wrote: *>GDB is the GNU debugger. Google lead me to http://sources.redhat.com/gdb/ More exactly a debugger that runs on at least a dozen cpus including some high power and some low power, inside them (ex. linux, bsd), or outside (choose host platform and use serial cable + stubs on target). The PIC is probably too small to support it properly (maybe 18F can). Peter -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.