>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_at_xenosoft.com
Received on Tue May 08 2001 - 20:14:02 BST