[Coco] Of Multi Pak Interfaces...

[Arthur Flexser]

On Fri, Mar 27, 2015 at 8:36 PM, RETRO Innovations <go4retro at go4retro.com>
wrote:

> On 3/25/2015 5:16 AM, Arthur Flexser wrote:
>
>> Out of curiosity, what would happen if you plugged one multipack into
>> another, or more gracefully accomplished the equivalent through a
>> connecting ribbon cable?  Could one get 7 slots that way, perhaps via some
>> minor modifications to the circuitry?
>>
> You'd have the equivalent of a 4 port USB hub connected to one port of
> another 4 port USB hub.  When that particular slot was selected, you'd get
> access to 4 ports.
>
> But...
>
> It would be unsusable Howas is, since the $ff7f config register is
> shared.  So, you'd never see more than 1 of the ports on the second MPI.
> If you plug he second MPI into slot 3 of the initial MPI, only slot 3 would
> ever be active on the second MPI.
>

 How hard would it be to modify the second MPI to use a different address
than $FF7F for its slot selection?  (I ask this purely out of idle
curiosity.)

Art