6502/Z80 speed comparison (was MITS 2SIO serial chip?)

From: Sipke de Wal <sipke_at_wxs.nl>
Date: Sat Dec 22 03:43:38 2001

I whole hartedly agree !

It's the systemsoftware and the application combined with
a large userbase that determines succes. In the late '80 the
Apple II(x) was nice but CP/M enabled more manufactorers
with rather different hardware to tap the same potential
user/clientbase. Even a (microsoft) Z80 card was made for
the Apple II(x) platform while it already had a good CPU ?????

Very much the same happened almost a decade (I'm talking
about the breaktrough period here) later with the IBM-PC
and its clones . And in that case designquality again
was not the issue.

----- Original Message -----
From: ajp166 <ajp166_at_bellatlantic.net>
To: <classiccmp_at_classiccmp.org>
Sent: Saturday, December 22, 2001 3:40 AM
Subject: Re: 6502/Z80 speed comparison (was MITS 2SIO serial chip?)

> From: Richard Erlacher <edick_at_idcomm.com>
> >without modification, in most cases, on a Z80,.by the time the 6502
> became
> >popular. Now, I've always believed the 6502 at 1 MHz to compare
> favorably with
> >the 4 MHz Z80, but I used the Z80 running CP/M 2.2 to do useful work,
> since it
> >was a lot more trouble squeezing useful work out of a 6502 back in
> '78-'79.
> If anything I'd say CP/M was a factor more than any virtue of Z80. I say
> that as
> most "z80" code underused the Z80 as a fancy 8080. One may wonder if a
> cp/m like (or better!) OS existed for 6502 such that it was portable or
> easily
> ported if things may have developed differently.
> Allison
Received on Sat Dec 22 2001 - 03:43:38 GMT

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