Re: RGB card

[mojoehand <jgray@zianet.com>]

> If this connector is named "J19" then it is used for switching
> the two character sets in the VIDEO ROM - provided you have
> a 4KB ROM. This is true for European Apple IIe's (either PAL
> or "International NTSC", where they are located on different
> positions).
>
> I have two older, unenhanced US mainboards which provide holes
> and a J19-marking at the place you describe and I've seen photos
> of an enhanced ("Platinum") mainboard with a connector soldered
> in at this position. Maybe for expansion reasons.
>
> If the function is identical to J19 on European mainboards then
> you follow a wrong 'lead' here, IMHO.
>
> bye
> Marcus

Bingo! Thanks for the info. It saves me the trouble of locating a
schematic.

Maybe when I have more time, I'll attempt to trace out the schematic
for this board. My skills in this area are very rusty, not having done
such in many years. I don't even have a TTL Data Book any more (oh
no!).

Speaking of TTL, just today I saw a copy of Don Lancaster's "TV
Typewriter Cookbook". Wow, that brings back memories.