Unknown Apple 2 cards

From: Tony Duell <ard_at_p850ug1.demon.co.uk>
Date: Tue Jun 10 19:12:00 2003

> > > PAL Colour Card: No idea as to manufacturer; mainly analogue circuitry on
> > > board plus the modulator and a bit of TTL. Am I likely to need software for
> > > this to work with a UK TV?
>
> > I don't think it'll need special software. It goes in slot 7 (only -- it
> > needs some clock signals that are only on that slot), and may also
> > connect to one of the aux video connectors on the mainboard. You also
> > have to do the Eurapple modification (as in the TechRef -- cut and jumper
> > the pads and change the crystal) unless you have a Europlus.
>
> Or just use an according 'PAL' Apple.

There is no such thing as a PAL Apple ][ AFAIK. No Apple ][ ever
generated PAL video on the mainboard.

The Europlus (that's why I mentioend it) generates European TV scan
rates, but the colour encoding on the mainboard is _not_ PAL. The PAL
enocder card will plug into that mainboard and then generate European PAL
video.

The Europlus is a slightly modified Apple ][+. There are a few
cut-n-jumper pads that convert the video timing chain (shown in the
techref and on the schematics). The master clock crystal is a slightly
different freqeuncy (I forget what). That's it. Most Apple ][s sold in
Europe have been factory-modified to this spec AFAIK.

-tony
Received on Tue Jun 10 2003 - 19:12:00 BST