30 Sep
2001
30 Sep
'01
6:24 a.m.
Since this is about 8080/8080A the answer is fairly complex and simple
at the same time.
The 8080A had improved drive (not that much better) and improved interupt
to hold
timing. There were a few other minor differences of no real consequence.
The 8080
was a bear with regard to DMA (hold/) and the 8080A was slightly better.
Neither
were that much fun to work with. For non-DMA designs the difference is
insignificant.
Both worked fine wtih Standard TTL _IF_ you followed fanout rules and
buffered things correctly.
Allison
-----Original Message-----
From: Russ Blakeman <rhblakeman(a)kih.net>
To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org>
Date: Sunday, September 30, 2001 2:04 PM
Subject: RE: 8080 vs. 8080A
Hadn't heard anything of an 8088/86 series bug but
I know there's a 32
bit
applications lockup problem in some 386DX-16's and
the well known
floating
point math problem in the original Pentium series.
-----Original Message-----
From: owner-classiccmp(a)classiccmp.org
[mailto:owner-classiccmp@classiccmp.org]On Behalf Of John Galt
Sent: Sunday, September 30, 2001 11:18 AM
To: classiccmp(a)classiccmp.org
Subject: 8080 vs. 8080A
Can anyone here describe the technical differences between
an Intel 8080 and Intel 8080A CPU?
The ONLY ref. I have been able to find seems to indicate that there
was a
bug in the 8080 and as a result it would only work with
low power TTL?
The problem was fixed in the 8080A and it would work with
standard TTL?
Does this make sense to anyone?
Could anyone put this into laymans terms for me?
Thanks,
George Phillips - gmphillips(a)earthlink.net