[Coco] [color computer] Just imagining...

[David L. Foreman]

One of the 650(x) companies had a development system with two processors.
One  processor was clocked 180 degrees out from the other one and could 
access memory and I/O while the other was
on the internal half cycle. This was used in program development and you 
could see what was changing in memory etc. while the
first processor was running the program being tested.
Two 6809s should be able to be set up that way.
Dave Foreman

----- Original Message ----- 
From: "Leonard Miller" <leonard23 at verizon.net>
To: "'CoCoList for Color Computer Enthusiasts'" <coco at maltedmedia.com>
Sent: Tuesday, January 31, 2006 10:12 AM
Subject: RE: [Coco] [color computer] Just imagining...


Isn't there a computer that has two processors on it?  I think it is a
fujitsu (spelling?) or something like that.  I often wondered if anybody
ever ran os9 on that.

Leonard


-----Original Message-----
From: coco-bounces at maltedmedia.com [mailto:coco-bounces at maltedmedia.com] On
Behalf Of Mike Pepe
Sent: Tuesday, January 31, 2006 11:17 AM
To: CoCoList for Color Computer Enthusiasts
Subject: Re: [Coco] [color computer] Just imagining...

jdaggett at gate.net wrote:
> Mike
>
> That setup will run no faster than one 6309, unless you rewrite the OS to
> handle multiprocessors.
>
> Nice idea of using multiple processors. Currently there is no OS to
support
> multiple 6x09 processors that I know of.  If one did exist then  splitting
taks
> up between them would be nice.
>
> Then I could put three 6809 cores into one 1 million gate FPGA and  have a

> real nice system running at about 20 MHz to 30 MHz.
>
> james
>

Understood, but I was thinking of one CPU to handle the OS, and then
driver-level stuff to offload to the others. One CPU could handle all
the graphics, one could be configured as a DMA or handle I/O. I've done
some preliminary feasability studies on the idea, and with some sub-50ns
SRAM or SDRAM it just might work...

-Mike


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