8080 vs. 8080A

From: ajp166 <ajp166_at_bellatlantic.net>
Date: Sun Sep 30 13:24:22 2001

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_at_kih.net>
To: classiccmp_at_classiccmp.org <classiccmp_at_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_at_classiccmp.org
>[mailto:owner-classiccmp_at_classiccmp.org]On Behalf Of John Galt
> Sent: Sunday, September 30, 2001 11:18 AM
> To: classiccmp_at_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_at_earthlink.net
>
Received on Sun Sep 30 2001 - 13:24:22 BST