[Coco] ROM Cart registers

[Darren A]

On Sun, Jan 31, 2016 at 9:08 AM, RETRO Innovations wrote

The MPI specifically handles this, by gating the SCS lines to each slot.
> With a slot selected on the MPI, the SCS line is only sent to that slot.
> Thus, only that slot will respond to those $ffxx addresses.  Thus, in the
> MPI, you can technically have 4 of the same type of controller (with the
> same exact configuration settings) respond on the bus
>
> Your statements are correct if someone uses a "y" adapter or something
> that allows all signals to go to both devices.  In that case, there is
> absolutely a conflict.
>


Or if a device decides to assert SLENB* for addresses in the SCS range
(SuperIDE ??). This makes the SCS routing of the MPI meaningless and
creates compatibility issues for other devices that play by the rules.

- Darren