On Mon, 12 Oct 2009 08:57:31 +0200, "Ed Groenenberg" <quapla at xs4all.nl> wrote: When I was doing my thesis, I used an 8085 assembler under RSX-11M that somebody at the university had written by writing a bunch of macros for Macro-11, one macro for each 8085 mnemonic. We used the task builder as a linker, and then a utility, again written by some student, to convert the image to Intel Hex. I think the PROM burner was controlled by the PDP as well. I'm sure you could do the same for the 6502. /Jonas