I already have that. It supports 16M address space plus I already
patched the ROM so the ISR functions properly jump to the the lower 64K
region and return to the upper regions if needed.
Ken
On 5/2/16 1:32 PM, Stephen Adolph wrote:
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 <[email protected]> wrote:
On Monday, May 2, 2016, Bruce H McIntosh <[email protected]> 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.
