bill perkins wrote: > Yup, I ran HDOS- it wasn't bad, and the source was available; I bought > the books when they were discontinuing them. HDOS was written for the > 8080, though, not a Z80 instruction in sight! I added a patch to map > some reserved space to RAM, wound up with 56K RAM and 8K ROM thereby, > and another patch to allow the modem to tie in directly to the terminal, > so I could access the system from work. I got to show my boss what an > actual assembler could do, as opposed to typing hex codes into an EPROM > burner. My boss went to up to the Pres's office and snagged the only PC > in the building, bought a cross assembler for Z80, and the rest (for me) > was history. > What is really interesting is that there is software for both DOS and Linux that will let you run CP/M on a PC. So you can run the native 8080 and Z80 assemblers and dis-assemblers under CP/M. There was even a version that took advantage of the NEC 8086/8088 replacement CPU's that would also do 8080 instruction sets. Mikkel -- Do not meddle in the affairs of dragons, for thou art crunchy and taste good with Ketchup!