The NSC800 conversion is mostly compatible stand alone with M100 software. There are a couple of things it can't do, like use the cassette port or importantly it cannot run REXMGR.
(The latter is because all of REX leverages undocumented opcodes. I don't want to rewrite REX# or REXCPM software for this. ) But you do need REXCPM hardware to support CPM. That's why for the most part it only makes sense to drop in a Z80 if you want to run CPM. Then you get access totally the software out there. Without the REXCPM hardware you get .. an M100 work alike. Well it can run Z80 opcodes too in case you want to write machine code. Cheers Steve On Friday, January 19, 2024, r cs <secri...@gmail.com> wrote: > I am interested. What upgrade path would you recommend for someone with > half a dozen first gen REX and first gen non-REX CPMs? > > Thanks, > rcs > > On Fri, Jan 19, 2024 at 6:09 PM Stephen Adolph <twospru...@gmail.com> > wrote: > >> Hi folks, >> Before the break I built an NSC800 conversion kit for someone who I guess >> changed their mind. >> >> So, this kit is here and available if anyone is interested. Ideally >> you'd use this with a REXCPM and use it for actual CPM stuff. >> >> Let me know if you feel the urge to swap the brain of your M100! >> >> Steve >> > > > -- > *Níl aon tinteán mar do thinteán féin. *[Irish Gaelic] > (There is no fireside like your own fireside.) > > >
