P112 redesigned for Z280?

allison allisonportable at gmail.com
Wed Dec 12 10:14:45 CST 2018

On 12/12/2018 07:58 AM, David Griffith via cctalk wrote:
> My reply is at the bottom.
> Please put your reply there too.
> On Tue, 4 Dec 2018, ben via cctalk wrote:
>> On 12/4/2018 1:17 PM, Tony Nicholson via cctalk wrote:
>>> Hello David
>>> I saw your posting on the cctalk mailing list regarding RSX180.
>>> It is Hector Peraza that's been tinkering with this.  He intends
>>> making the
>>> full source-code available via SourceForge or GitHub but is still
>>> working
>>> on preliminary web pages and documenting etc.  No doubt he will
>>> provide you
>>> with more details.
>>> I've been tinkering with a Z280 system designed by Bill Shen (the
>>> Z280RC on
>>> the RetroBrew web site at
>>> https://www.retrobrewcomputers.org/doku.php?id=builderpages:plasmo:z280rc
>>> )
>>> and have contacted Hector about porting it to the Z280.
>> That is the easy part, where is the 99 cent dumb terminal to go with it?
>> Ben.
> That's got me thinking... Suppose I redesign the P112 board to take a
> Z280 CPU.  Would you guys go for it?  I'd like to come up with a way
> to use a socketed CPU or put a surface-mounted chip on a carrier board
> to allow greater versatility with playing with different Zilog chips.

I'd be interested in a Z280 system.  I have a few of the jlead (socketed
format) chips of very late revision
I've built around.   The design work I used was started by Tim Olmstead.
   The RSX system would likely
run very well as Z280 offers larger memory, I&D space,  supervisor/use,
and MMU so a real protected
space OS is possible. 


More information about the cctech mailing list