7 Jul
2006
7 Jul
'06
9:04 p.m.
On 7/8/06, Chuck Guzis <cclist at sydex.com> wrote:
On 7/8/2006 at 12:58 AM ard at p850ug1.demon.co.uk
wrote:
Yeah... unfortunately, that's the case... I have several boards here with 8255s,
Yes, I know about the bidirexctional mode (Mode 2
IIRC). But to use that
in a lot of cases is a kludge too. Personally I'd rather link a 6522 or
similar to the ISA bus.
Tony, I know that you hate the 8255, but the streets are paved with them,
whereas the 6522 is a little harder to get one's hands on. from an RB5X to an MC-1N (micro-controller based on the
INS 8073), to
the sbc6120,
to a couple of ancient ISA DAQ boards with many 8255s.
With my Commodore background, I never encountered an 8255 until a few
years ago. I did pick up a copy of the classic 8255 text a while back
- it explains a lot.
-ethan