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Char ROM length in IIe and IIc models
Please, could someone verify on the real thing if the chip where
characters are stored in IIe and IIc models is 2048 or 4096 bytes long?
I'm trying to locate/recreate the original dump for using it in MESS
emulator, and my sources are the files in these archives:
ftp://ftp.apple.asimov.net/pub/apple_II/unsorted/ROMS.ZIP
ftp://ftp.apple.asimov.net/pub/apple_II/unsorted/ROMS.ZIP.TXT
Looking at the file 342-0275 (German/USA charset) I've seen that it's
layout is the following:
256 German chars
256 garbage chars
256 USA chars
256 garbage chars
So I suppose that the charset in USA models should be just 4096 bytes
long, right?
I've also another question, but maybe this is just a bug in MESS:
uppercase inverse characters are correctly displayed but lowercase
inverse char are not - inverse "a" is displayed as inverse "!" and so
on. Where can I find a correct table that shows the correspondance
between the codes that are POKEd in video RAM and their graphical
representation (and possibly the ASCII codes too)?
Thanks,
--
Stefano Priore | Debian Woody 3.0r1
--------------------------------+--------------------------------
"Video meliora proboque, | Linux Registered User #210152
autem deteriora sequor..." | Linux Registered Machine #97752