[Coco] SuperIDE behavior question

[RETRO Innovations]

On 1/30/2016 11:55 PM, RETRO Innovations wrote:
> With the borrowed SuperIDE I have here, I am seeing something 
> interesting when I pair it with another cartridge.
>
> It appears that SuperIDE (and I assume the mini-Flash) assert /SLENB 
> on any access from $ff50 to $ff5f (when the unit is configured to 
> reside at $ff50-$ff59).  This happens even when the unit is not 
> selected on an MPI, and I have verified that SCS is not activated on 
> the slot that the SuperIDE sits on.
>
> Has anyone else seen this behavior?  It is easily recreated, so I am 
> pretty sure it is by design.
>
> Dealing with this in the MPI might be difficult.  I seems like it 
> would require routing the SLENB lines through the CPLD, requiring more 
> IO than I might have available.
>
> Anyone with an idea of why a SUperIDE would do this when it is not 
> selected (via SCS)?
>
> Jim
>
>
>
I just realized that dealing with it in my MPI helps not at all, because 
it won't help Tandy MPI owners.

Hmmm, it basically means that I must select a new base address if in a 
system with a SuperIDE.

Jim

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