[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: MouseText on II+



Bill Garber replied:

>> The second ROM socket is for the secondary character set
>> (7x9 characters) for the Videx card.  It was often used for
>> inverse characters to support VisiCalc, IIRC.
>
>Thanks, and although this is quite true, it isn't auto-detectable.
>You have to instill a keyboard command, AFAICT, to get the
>secondary character set to be implemented.

Well, you certainly have to select the secondary font, which
can be done with a keyboard sequence, though it is usually
done through a software protocol.

I believe that there was an (obscure) software protocol for
determining whether the secondary font ROM was installed,
as well (and maybe even reading it).

-michael

Check out amazing quality 8-bit Apple sound on my
Home page:  http://members.aol.com/MJMahon/