Unknown Apple 2 cards

10 Jun 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

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Unknown Apple 2 cards