On Tue, 20 Jun 2000, David Heremans wrote:
> Is there some page which could tell me how all the MSX version react on
> an in a,(#FF). I know it shouldn't be done but I'm trying to change a
> program...
In MSX turbo R and some MSX2+ machines, the upper 3 bits will always be 1.
The value read will be the selected segment in the largest mapper in the
system.
Note that "largest" means the number of bits the mapper register is wide,
not necessarily the amount of memory in that mapper. But I don't know of
any case where the mapper registers are wider than is necessary for the
amount of memory connected to them.
Bye,
Maarten
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