Re: Changing the ASCII characters

[david@uow.edu.au (David Wilson)]

Rubywand <rubywand@swbell.net> writes:

>Hector Gonzalez writes ...
>>  Somebody knows how to changing the ASCII characters in the APPLE IIe or in
>> a Multitech MPF-III, for example, I need to change the @ for a character
>> that I invented.

>     As Nathan observes, what you want to do is swap in a custom
>character generator PROM for your Text display. We did this when the

>     Doing your own character generator PROM (called the "Video ROM" on
>a IIe) should not too be difficult. It looks like you'd use a 2732 or
>2532 PROM.

Watch out - the 2532 has a different pinout to the 2732. Apple uses 2732
(EPROM) or 2332 (ROM) chips in NTSC //e (and 2764/2364 in PAL //e).

For more information on the CHARGEN ROM, read Jim Sather's "Understanding
the Apple //e".

P.S. My Multitech MPF-III had its non-mousetext ROM replaced with one with
mousetext. My PAL Apple //e had the 2nd half of the ROM replaced with a
character set with vt100 line drawing characters and 96 ASCII chars in
both normal and reverse.
--
David Wilson  School of IT & CS, Uni of Wollongong, Australia  david@uow.edu.au