Back over 2 years ago Andrew and I put
together an S100 bus “MSDOS Support board”.
This board was designed to allow one to run
Microsoft’s MSDOS (V4.10)
right out of the box utilizing common
hardware/configuration etc. found in a PC
and our 8088/8086/80286 family of CPU boards.
The board has proven to be very popular
and reliable. Over 20 boards were already made and
distributed to
users. I decided to add a few small changes to the board
to improve its
functionality. We are calling this board the “V2-MSDOS Support Board”. The changes
include:-
1. Add a HolTek
HT6542 PC
keyboard controller chip to allow a MSDOS keyboard
and mouse connection
2. Replace the RTC
with a chip
that utilizes a separate battery for future
replacements/availability
3. Optimize the
board layout and traces so the overall lengths are
shorter and more reliable
4. Remove the
S100 bus extra
wait state circuit
5. Label the
board jumper options on the board
better.
A brief
description of the V2
board can be found here:-
http://s100computers.com/My%20System%20Pages/MSDOS%20Board/MSDOS%20Board.htm#V2 MS_DOS Support
(Bottom of the
page).
It’s unclear what
the interest is
in people obtaining a “commercial style” bare board like
this. I will definitely
be getting 3 for myself. If you absolutely need one sooner
rather than later
let Andrew know we can include you in the early “first
batch”. Otherwise
stay tuned for a later group
purchase by (hopefully) a group member that will organize
a larger purchase -
at a lower price.