[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Z80 CPU Speeds?

Patrick Schaefer <PSchaefer@epost.de> writes:

> John schrieb:
> 
> > I also saw something with Z?? 180 at the end which was, I think, faster
> > still, or at least 8 HHz or more.
> 
> The Z180 was used in the famous HP DeskJet 500 printer series. These
> CPUs were available up to 20 MHz.
> 
> And the Z8 is the microcontroller (=single chip computer) version of the
> Z80 microprocessor. These controlled Apple's Profile and Widget hard
> drives.

        I think that's wrong - the Z8 and the Z80 are completely
different architectures. 

        Hitachi made the 64180 series, which were Z80 compatible and
had a number of support "chips" integrated, including a bank-switched
memory management unit, a couple of counter/timers, and two serial
ports. I *think* the Z180 may have been functionally identical.


-- 
Raymond Wiker                        Mail:  Raymond.Wiker@fast.no
Senior Software Engineer             Web:   http://www.fast.no/
Fast Search & Transfer ASA           Phone: +47 23 01 11 60
P.O. Box 1677 Vika                   Fax:   +47 35 54 87 99
NO-0120 Oslo, NORWAY                 Mob:   +47 48 01 11 60

Try FAST Search: http://alltheweb.com/