24 Nov
2013
24 Nov
'13
12:37 p.m.
On 23 November 2013 22:54, Robert Jarratt <robert.jarratt at ntlworld.com> wrote:
Yes, a 486s, It;s a little kludgevboard in the socket that held the
80286. It is the original IBM motheboard.
Just out of interest, what machine do you use?
If I remember correctly, it's something like an original IBM PC-AT,
with a 386 CPU upgrade board in it, possibly with a 486 or 486sl upgrade on that. 16MB of RAM, possibly.
Make that 7.5M or thereabouts. I seem to remember i have the normal 640K
and 7M above the 1M boundary.
But he has all the schematics, so that he can repair it if it fails, you see.
And the ROM source listings....
-tony