[Coco] hardware port mapping question

[Mark McDougall]

Mike Pepe wrote:

> Essentially what you're making here could be a 4x4 crossbar switch:
> 
>  ABCD
> A++++
> B++++
> C++++
> D++++
> 
> It could be done with a bunch of latches and tri-state buffers. 
> Arbitration could be an issue, but it sounds like what you're looking 
> for is for each CoCo to have one "out" port that can be read by the 
> others. If that's the case, it becomes more possible. If you're looking 
> to write values into a common register, it becomes much more complex.

You could, of course, come up with a protocol that requires each computer to 
write to its own latch only.

Regards,

-- 
|              Mark McDougall                | "Electrical Engineers do it
|  <http://members.iinet.net.au/~msmcdoug>   |   with less resistance!"