[Coco] Question re: Cart slot decode

Gene Heskett gene.heskett at verizon.net
Mon Feb 2 20:04:04 EST 2009


On Monday 02 February 2009, Steven Hirsch wrote:
>I'm looking for a definitive answer on whether accesses between ff60-ff7e
>are supposed to be decoded by the Multi-Pak and/or slot cartridges.
>
>All the docs seem to indicate that the SCS region is ff40-ff5f and the
>control register for the MP is at ff7f.  So, who owns the in-between
>addresses?
>
Whatever card wants to do the address decoding to put itself there.  I have 
moved several cards around here to prevent such conflicts.

>I have a set of PAL equations for the older (large) MP that suggest it
>listens to the entire ff40-ff7f range, but it would be good to get a
>second opinion :-).
>
>Steve



-- 
Cheers, Gene
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