14 Dec
2001
14 Dec
'01
1:28 p.m.
On Fri, 14 Dec 2001, Gene Buckle wrote:
The same reason they chose active high edge triggered interrupts on the
bus (wrong on both counts)
The same reason they used 8 bits of an 8255 to read the KB shift register
that had a (unused) tri-state
The PC = A horrible, amateurishly designed kluge
Peter Wallace
NS* did use
them as did many others. The worst chip was
the 8250.
Which makes me wonder what possessed IBM to pick it for the PC.
g.