Subj : Re: The XT that became a 486
To   : kirkspragg
From : poindexter FORTRAN
Date : Sun Sep 14 2025 09:10:35

-=> kirkspragg wrote to hyjinx <=-

 ki> Also I wonder what performance would be like using a super XT
 ki> motherboard that runs at a higher clock speed than the XT? Bumping the
 ki> ISA bus speed up to 8 or 10Mhz would surely speed things up quite a
 ki> bit!

Timing on old ISA cards was tricky - I had an AT that I tried swapping
crystals on. Tried going for 16 mhz, ended up having to settle for 12
because of crashes. I remember reading that card timing was usually the
problem.

Amazing to think back then how we got around with so little. I had a 8
mhz 286, clocked to 12, 2 MB of RAM on the motherboard, and had an AST
AboveBoard with 8 MB extra on it, plus 2 socketed UART serial ports. One
of them got a 16550 to run a modem, and the system was able to run
Geoworks and Windows 3.0 (but just barely)

Those were fun times.

.... Adding on
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