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Apple II 80 col card

AndyG

Experienced Member
Joined
Oct 11, 2016
Messages
396
Location
UK
Hello

I have an Apple II M&R Enterprises Sup'R'Terminal 80 col card for the Apple II. Wasn’t working but by replacing the ram and associated IC’s it now works. However, unlike the Apple II itself I do not get a signal from the composite output that displays on my LCD screen. I have to go through a Scart/Composite to HDMI box to get a display (a scan doubler also works). I find this strange as the Apple II composite output is fine and so is a Microtek Magnum 80-col board. My LCD handles both PAL and NTSC signals.

the rom has 50hz written on it and it works fine. I tried a 60hz rom image found on the net and same thing.

The link to the only available documentation for this board is

http://mirrors.apple2.org.za/Apple%2...7R%27TERMINAL/

My question, How does this board generate/set the frequency of the composite signal ?

I am trying to figure out if this behaviour is normal or I still have a problem.

thanks
Andy
 
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