On Sun, 21 Mar 1999, Erik wrote:
> So that rumor is solved , you are allowed to read them.
> The only problem is that the unused bit's of the registers can return
> unexpected data.( always 1 or 0 or the data you did write to it or maybe crap)
> You first have to calculate the amount of memory and the number of used bit's.
> If you have done this you can use this information to mask the return data of the
> registers.
The only thing you need to expect is that writing the data you read from
the mapperport will set it back to the state it was in when you read it.
All other info about the mapper can be obtained by writing to the port and
reading and writing the memory.
> You also have to take care that some people have more then 1 mapper (however this
> is
> technically not allowed , but who cares)
Not allowed? Hmm, didn't know that. Well, many people have it anyway, so
it better be supported, I guess...
Bye,
shevek
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