9 Nov
2015
9 Nov
'15
8:26 p.m.
On Thu, Nov 5, 2015 at 8:18 PM, Guy Sotomayor <ggs at shiresoft.com> wrote:
* The expansion bus in the IBM PC was the same bus as
the System/23. The
connector was rotated 180* so that some of the less expensive
cards from the PC couldn't be used in the System/23. The other
reason for this was since the IBM PC was done on a "shoe string"
budget, they could take the System/23 cards and only had to do some
minimal re-layout of the board.
Did the System/23 also use edge-triggered interrupts, rather than level?
Do you have any idea why it was thought a good idea to use
edge-triggered interrupts?