z180, z2780, z380 was: Re: Modern CP/M machine classic?

[Allison]

>
>Subject: Re: z180, z2780, z380 was: Re: Modern CP/M machine classic?
>   From: David Griffith <dgriffi at cs.csubak.edu>
>   Date: Mon, 04 Sep 2006 17:03:50 -0700 (PDT)
>     To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>
>
>On Mon, 4 Sep 2006, e.stiebler wrote:
>
>> David Griffith wrote:
>> > I was wondering if a recently made machine intended to be used as a
>> > "classic" computer qualifies as a "classic" here.  Here are some examples:
>> >
>> > P112: A Z180 single board computer still available brand-new which runs
>> > ZSDOS and probably straight CP/M too.
>>
>> Were there any SBCs with the later z280 & z380 chips ?
>> A short google search didn't find anything. So, anybody here knows of
>> any SBC with the z280, z380 (or similar ?) chips ?
>
>I've been pondering a redesign of the P112 for a while.  I'll probably
>investigate using a z280 or z380 for a brand-new design.


The biggest problem doing a Z280 design is finding enough late rev Z280s. 
The z280 in it's early revs had a number of bugs that impacted the MMU 
and cache.  However, if you find enough parts it's a interesting varient
of the z80 line with a 16bit wide data bus, 24bit addressing, MMU and
I&D space.  It's instruction set is enhanced as well.  Despite all that
it's fully Z80 upward compatable and will run most z80 binaries found 
in the Z80 CP/M world.  FYI: fast parts are in the 12.5 to 16mhz range.



Allison