oberleithner.w dec�a:
> >To solve the mapper problem by hardware is very difficult: it's located
> >inside the S1990 MSX-engine.
> >But only software that read mapper ports (which is illegal!) will
> encounter
> >the problem. Well-written software will work with large mappers on S1990
> >machines.
> Hi,
> I have to remove a bug in my program. And this is
> (maybe) exatcly about the thing you wrote above.
> What is illegal by reading the mapper-ports?
> If you dont have DOS2, how can you read/write them
> in a legal way without using the direct IN/OUT???
You shuld make a copy of the data sent to a mapper port in RAM and then
read this copy in fact of do an IN.
It seems stupid, but mapper ports aren't read/write... just write. The
confussion is that most MSX2 and other computers has also the read
option, but it's not standart.
Due to this stupid mistake in most programs European games don't run on
japanese machines.
Hasta incluso,
Ram�n
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