There were, it
seems, various Torch Z80 addons for the BBC Micro.
Yes, quite a few - plus various self-contained machines which used the BBC
board as an I/O processor. Most of them vanished to landfill years ago, it
There were also later Torch machines that were stnadalone units without a
BBC micro board. They ere not Z80 based (68K machines IIRC). But you
mentioend hte Graduate which wasn't a Z80 machine either (8088 MS-DOS
coprocessor of the beeb) so I guess you're conisdering all their products.
seems, and are quite rare these days (mainly because
they didn't have any
particular following back in the day, so nobody kept hold of them).
I've still got examples of all their boards, and a Graduate, and I think I
kept a 725 - but I got shot of my disc packs and C-series machine.
_All_ their boards? I am impressed. A quad-X is not at all easy to find...
As for the
Tatung, I've found very little info on XTal DOS, apart from
something calling it " a compatible but beefed-up version of CP/M
called Xtal DOS."
Yes, no experience there myself... I think I've only ever used an Einstein
for about 5 minutes :)
I've got an Eitstein, but I've never done much XtalDos hackeing. It does
feel a lot like CP/M and from what I recall when a friend ported Fig
Forth and Argon chess to the Eintein there were not problems at all.