Maybe this is an early nonstandard IDE implementation?
We all know too
well how IBM liked to do things "their way"... We wouldn't have PS/2
hardware at all if IBM had stuck to the then emerging standards of the
time.
A standard which IBM set, along with quite a few other things
that either they developed or were an early adopter of. You can
thank the PS/2's for things you use every day, such as VGA, the HD
3.5" floppy drive, PS/2 mouse/keyboard ports, etc.
Jeff
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