29 Oct
2010
29 Oct
'10
10:31 p.m.
On 10/29/10 4:55 PM, Tony Duell wrote:
He certainly did, I remember that article well. He started the
article by relating a conversation that he'd had with a fellow computer
guy, and they were arguing (I think) 6800 vs. Z80. He said something
like "When he said the 6800 had memory-mapped I/O and the Z80 didn't, I
knew he didn't know what it was". :)
-Dave
--
Dave McGuire
Port Charlotte, FL
> Just
because a CPU architecture has IO instructions doesn't mean you
> can't do memory-mapped I/O.
I beleive Steve Ciarcia said in one of the Circuit Cellar articles in
Byte many year ago that any processor that could access memory could have
memory-mapped I/O.