Ideas for a simple, but somewhat extendable computer bus

[Eric Christopherson]

On Fri, Nov 17, 2017, ben via cctalk wrote:
> On 11/17/2017 6:59 PM, Chuck Guzis via cctalk wrote:
> > On 11/17/2017 05:34 PM, Jim Brain via cctalk wrote:
> > 
> > > It does not have to be fast.  I rather thought, "what is the simplest
> > > multi-cpu shared bus that could be easily understood by folks and allow
> > > them to focus on multi-processing education, not bus understanding"
> > 
> > How about a serial bus?  Physically simple and not too awful logically
> > today.  Say, I2C or SPI...
> > 
> > --Chuck
> 
> Say USB-version 101101100 :)

Sorry to be dense, but are you referring to some actual USB version? Or
did you mean something like "one of the many USB versions, some not yet
released"? (101101100 is 364 in binary, but I don't see the significance
of that.)

> 
> I would say use a 68000 if your still can get them,
> but run with a 6800 style clock. The master CPU and
> shared memory on the high phase of the clock. The
> slave CPU's on the low clock PHASE (clocked by a inverted clock).
> This will give you multi-processing with a bit more than
> 64KB.
> Ben.

-- 
        Eric Christopherson