Dead IBM PC 5150 motherboard - help troubleshooting
ard at p850ug1.demon.co.uk
Wed Jan 23 18:21:26 CST 2008
> --- Tony Duell <ard at p850ug1.demon.co.uk> wrote:
> > The 5150 is a _very_ conventional 8088 design,
> > there's really nothing at
> > all odd about it.
> what examples could you give as a not so conventional
> 8088 board?
Depends on what I/you mean by 'unconventional'. But considerably less
conventional than the IBM 5150 are the Sirius/Victor 9000 (It uses 6522s
for I/O and has an 'interesting' video circuit), DEC Rainbow
(dual-processor with a Z80 and 8088, and the video chips from a VT100),
HP150-II (it has a CPU configured in minimum mode. But you can add an
8087 add-on card. Since the minimum mode doesn't support coprocessors,
the add-on card has an 8088 on it in maximum mode along with logic to
provide the minimum-mode signals to the rest of the machine. When that
card is fitted, the 8088 on the mainboard is disabled).
Not a computer, but somewhere I haev a 1200 baud modem that uses an 8088
as a DSP (A very odd choice...)
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