From: Andre Fachat (afachat_at_gmx.de)
Date: 2003-12-20 17:57:58
Hi All, I think there are different versions of the PET usage of the $E000-$E7FF area, but I don't remember the details. I know that in the CBM 8xxx models the E000-E7FF PET use this area as the screen editor code. The area $E900-$EFFF is being used - I think - by internationalized versions of the PET screen editor ROM (some CBM 8xxx). IIRC the I/O Area was either 2k ($E800-$EFFF) or 256 byte ($E800-$E8FF) depending on the PET model. So for the newer PET versions there will be a ROM area. I don't remember how the ROM was actually accessed and whether it was mirrored. I would have to dive back into the schematics again... :-) Andre Spiro Trikaliotis wrote: > > Hi Ruud, > > On Fri, Dec 19, 2003 at 01:12:47PM +0100, Baltissen, GJPAA (Ruud) wrote: > > > say so. If VICE has no mirrors and real 8032 indeed has them then > > - VICE is wrong > > - and I'm happy with it because it proofs I can use this area as I > > want it :) > > Even if the mirrors were not there (and VICE is correct), this area will > most probably be usable as the behaviour of VICE show's there would be > open memory there. > > Spiro. > > -- > Spiro R. Trikaliotis > http://www.trikaliotis.net/ > > Message was sent through the cbm-hackers mailing list Message was sent through the cbm-hackers mailing list
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