8 May
2001
8 May
'01
1:14 p.m.
It may be proprietary since I fear (but don't know)
that one slot cannot
be m-plexed in std isa. Seemed like straight through connections.
My recollection is that the XT (and presumably AT) slots are simply wired
in parallel. Unlike certain other systems (Apple ][), the IBM can not
tell which slot a board is in.
EXCEPT!!!:
On the real (non-clone) IBM XT, the slot closest to the power supply IS
different from the others!
When IBM released the XT, they had an awful surplus of serial cards, so
they stuck a "free" serial card into that slot to prevent it from getting
used for anything else that it might not be compatible with.
--
Grumpy Ol' Fred cisin(a)xenosoft.com