Damn, beaten by a couple of days... ;-) I have also just finished an assembler for pics, just the documentation and a bit more testing left to do before its released. Compared to topic is has: pros: macros, real expressions, conditional assembly, local variables and labels, 12 and 14bit pics, a simple disassembler. cons: own object file format (with conversion tools to and from intel hex.) C format numbers (i.e. 0xff etc), and error handling is "simplistic" and finally no clever name (topic, aspic) thought up yet ;-) I will try to get the docs done this weekend and put it up for ftp next week. It has been built under linux and gcc, but should work under any unix or even dos (using djgpp). =%-) Ian p.s. votes for next tool being taken, simulator or picstart code downloader. p.p.s. does anyone know the format of the picstart download protocol or e-mail address for someone at microchip who might know.