PAL card: I think I've got it but...

[Linards Ticmanis <ticmanis@coli.uni-sb.de>]

...I'm not sure. The card I have seems to demand a signal VIDEO to be 
present on Slot 7 Pin 28, TEXT on pin 23 and 14M on pin 24. (Thanks 
again to P. Schaefer for the schematic!!)

Well, I know the Europlus has something on pins 23 and 24 (unused in the 
NTSC II+, right ends of the DMA and IRQ daisy chains). However I've 
never heard that it has anything special on pin 28 (daisy chain DMA from 
slot 7 to slot 6 in the NTSC II+). This could be a clone specific thing, 
right? I know the card is not made by Apple and it was used in some sort 
of clone before.

Questions:

1.) Are Pin 23 and 24 indeed TEXT and 14M? I assume the answer is YES.

2.) Is pin 28 indeed VIDEO? I assume NO.

This would explain why the card shows an extremely low contrast picture, 
barely visible within the "snow" you get when you turn monitor 
brightness to maximum: It's providing everything correctly, especially 
SYNC and color burst, except for the video signal proper, which is just 
"caught" through RFI in minute amounts.

There seems to be a place provided on the card to connect a wire to this 
same line, however where do I find a TTL level video signal on the 
board? I assume it's at the lower end of the 1.5K resistor which is the 
rightmost of the three that are to the right of the game connector - R7 
according to the Red Book, page 151, right?

Or can I just connect the "wire wrap pin" although it's not TTL?

(Now for the fun part: All of this didn't occur to me until after I had 
already unsoldered and replaced half of the components on this PAL 
card... Don't you hate it when that happens?)

Thanks again for your help,
--

Linards Ticmanis

 The Master said, "The business of laying on the colors follows the
preparation of the plain ground."