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.