21 Jun
2012
21 Jun
'12
4:06 a.m.
On 6/20/12 8:50 PM, Chuck Guzis wrote:
it really does make implementation of a
protected-mode
operating system simpler when all you have to do is pass messages to
an I/O processor.
One of the weirder systems I used was a Colex VME 68000 running Unisoft System V.
Colex started out building VME MSDOS systems, and the way they got in the Unix
workstation market was they just designed a 68000/68451 board with local memory
and glued it into their MSDOS box with the 80186 doing all the I/O. I still have
all the code for the MSDOS side (all 8086 assembler).
Colex went under around 1985 and were up in Foster City.
I remember going up there to buying a half a dozen of the things cheap (like $200
a box, which was really cheap for a 68K Unix system in 1985..)
to use as 68000 development systems for the AED graphics board set we were designing.