8 Feb
2010
8 Feb
'10
3:21 p.m.
N0body H0me wrote:
From what little I've managed to gather, the 6829
had some limitations that made it either difficult to use, or otherwise impractical for
many (if not most) applications. I've read someplace, for instance, that you were
restricted to four tasks. I suspect for that reason,
they're rarely seen. They were rare even in their own time.
A better approach, may be to create some hardware to emulate either
a Gimix or SwTPc style DAT (dynamic address translator). The key
element here, is that both of these are supported by some version
of OS/9.
The Dragon Beta/128 prototype also has a DAT implemented with a couple
of small SRAMS and a bunch of LS/PAL logic, used the output of one of
it's PIAs as a task select, and supported 16 tasks, and again was
supported by OS-9.
For those who don't know the Dragon Beta/128 was a prototype machine
that Dragon data where working on when they went bust, it was pretty
impressive specs for a machine of it's sort, dual 68B09s, up to 768K of
RAM etc. Details and pics here : http://www.dragondata.co.uk/
Cheers,
Phill.
--
Phill Harvey-Smith, Programmer, Hardware hacker, and general eccentric !
"You can twist perceptions, but reality won't budge" -- Rush.