There are lots of claims out there that the 14 MHz part actually runs quite
safely and reliably at 20. Unfortunately, they won't tell me what they charge
for their full-speed chip, so I won't order 'em. There are HDL's out there for
6502 core at considerable speeds well in excess of 20 MHz.
Dick
----- Original Message -----
From: "Hans Franke" <Hans.Franke_at_mch20.sbs.de>
To: <classiccmp_at_classiccmp.org>
Sent: Thursday, December 20, 2001 11:44 AM
Subject: Re: 6502/Z80 speed comparison (was MITS 2SIO serial chip?)
> > > Also, if you realy want 'ultimate speed' you have to look at actual
Versions.
> > > close Z80 relatives (like 180) are available up to 32 MHz (I have seen
only
> > > 20s, but well) while actual versions of the classic 6502 and 65816 is
able
> > > to do 14 MHz. Now take in account that a clock ratio of 1:3 to 1:4 for
6502
>
> > The 65816 can go up to 20Mhz. It is used in the SuperCPU for the 64 and
> > 128.
>
> I heared about that - just the Super CPU also uses WDC65C816S which are only
> specified up to 14 MHz ... I truly belive they are even above 20 MHz reliable,
> just not specified !
>
> Ciao
> Hans
>
> --
> VCF Europa 3.0 am 27./28. April 2002 in Muenchen
> http://www.vcfe.org/
>
>
Received on Fri Dec 21 2001 - 00:19:02 GMT