[Coco] SAMx4 - CPLD-based SAM replacement

[Phill Harvey-Smith]

On 02/12/2023 06:52, Ciaran Anscomb via Coco wrote:
> Joel Rees via Coco wrote:
> Exactly that.  I figured if I stripped out all the Stewart Orchard Banker
> Board stuff I'd call the result SAMx1 ;)
> 
> And there is a reason to do that - the banker board function intercepts
> $FF3x, which is usually shadowed PIA1, so it slightly reduces
> compatibility (possibly some CoCo CB ROMs would be affected?).
> 
> I also found that Phill Harvey-Smith's diagnostic cart failed unless I
> removed that intercept!

Failed in what way out of interest? And do they also fail on the banker 
board? Since I have neither the banker or your SAMx4, it's hard for me 
to try and replicate.

If Ciaran or Stuart could supply me with the hardware (or designs to 
make the banker hardware) I could see what the problem is....

Cheers.

Phill.