5 Jun
2014
5 Jun
'14
9:32 a.m.
On 2014-06-05 12:33 AM, Eric Smith wrote:
So for those of us who haven't had the
(mis)fortune to deal with the 8255,
what's so terrible about it?
I would not say it is terrible, but it is
considerably less flexible
that something like a 6821 or 6522. On the 8255 you can not select the
direction of individual pins they are set in groups.