Re: IIgs character ROM

["Marc S. Ressl" <mressl@gmail.com>]

On Jun 24, 6:16 am, demp...@actrix.gen.nz (David Empson) wrote:
> Bill Garber <willy4...@comcast.net> wrote:
> > If anyone has this, I'd love a copy, or if you could
> > tell me how to extract it from the machine itself.
>
> > Thanks in advance,
>
> It is buried inside the Mega II, so rather difficult to physically
> extract.
>
> If memory serves, there is a diagonstic register somewhere which lets
> you read data out of it. Might be mentioned in the IIgs Firmware
> Reference register listing? Not fully documented and I've never played
> with it.
>
> --
> David Empson
> demp...@actrix.gen.nz

Try this ROM dump:

http://code.google.com/p/openemulator/source/browse/trunk/roms/Apple/Apple%20IIGS%20Video%20US%20ROM.bin

It was not captured from the Mega II, but re-built in Apple IIe font
format using what the video display looks like. Maybe it helps you
somehow.

Best wishes,

Marc.-