Posted By
siz
on 2016-05-22
16:53:09
|  Re: Are addresses of Plus/$ at $D602-$D609 free?
My 2 cents: probably you want to add some kind of hardware expansion. On the 264 series computers I/O area is from $fd00 to $ff3f (in opposition with the C64's and C128's $d000-dfff).
This area is always mapped as I/O, you can't map it out. As the others said before: you always have RAM at $0002-$fcff and at $ff40-$ffff for read but you can turn on (in fact it's turned on by default) ROM instead of RAM $8000-$fcff and $ff40-$ffff.
Edit: I've copied Solder's I/O area map description to the Encyclopedia.
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