ok, here is a proposal. Let's get a small FPGA and make an 80c85V2 that includes extra instructions...make it retro compatible.
On Mon, May 2, 2016 at 4:19 PM, John R. Hogerhuis <jho...@pobox.com> wrote: > > > On Monday, May 2, 2016, Bruce H McIntosh <scots...@afn.org> wrote: >> >> On 2016-05-01 03:03, Hiraghm wrote: >>> >>> I know awhile back folks were talking about a CP/M port for the Model T. >>> Earlier today I was watching some Youtube videos on CP/M, which reminded >>> me of OS/9, and that got me wondering. >>> OS9 is re-entrant and position independent, multi-user and multi-tasking. >>> The original OS9 was designed to operate in 64k of ram. >>> >> OS/9 had a lot of stuff that relied utterly upon the 6809 CPU's >> architectural quirks. It was eventually ported to the 68000 and 80386. The >> 8085 might be a bit of a stretch. >> >> https://en.wikipedia.org/wiki/OS-9 >> > > And it would be slow. You would have to use some expensive tricks to > simulate position independent code. > > CP/M is way more doable and opens up access to a lot of compilers and other > applications. The roadmap and hardware is all there for the cp/m project. > Just need the people and gumption to get it done. > > -- John.
