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bombidragon

Peritel boards

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I got some NOS atari dealer parts (A box full!) and it has some atari computer peritel boards with the video output socket on one side and a header on the other. I assume these are for a 1200.

 

The markings say:

 

 

Peritel Adaptor

Assy CA061034

ICTV

3-83

 

 

I figure in the US these are pretty rare and any info would be great.

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Peritel is an aka for SCART.

 

I'd say most likely this thing is for a TT or Mega ST/e.

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Not enough info (what does that connector looks like? How many pins?) and very low quality pics. Don't think anyone can say something useful about it this way.

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2n2222A , They are three legs so yeah transistors. I'm pretty sure it is RGB amp with a output but no one I have talked to knows what it goes in.

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Those are indeed transistors. They probably buffer some signals. STs don't have a 8 pin DIN connector for monitor/TV output. They use a 13 pin DIN connector. According to the photos this thing gets +5V and +12V. Hmmm....

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I think it might be for a 400 or 800. What it probably does is amplify each luma output comming from the CTIA or GTIA and then connects each one to R G B plus the SYNC signal to an RGB monitor instead of combining them for use in composite or Y-C video. It's kind of a poor-man's RGB for the Atari. So, your lumanence values now create some color on an RGB monitor.

 

Somewhere, I have a couple of fuzzy zerox pages describing how to do this and has a schematic too. That information looks very very much like this.

Edited by puppetmark

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Well let's think of this. For RGB you need red, green, blue, ground and if the monitor doesn't sync-on-green, you'd also need sync. That makes 5 pins. I wonder what the other 3 pins are for. Are all pins of the connector connected to something on the PCB?

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Well let's think of this. For RGB you need red, green, blue, ground and if the monitor doesn't sync-on-green, you'd also need sync. That makes 5 pins. I wonder what the other 3 pins are for. Are all pins of the connector connected to something on the PCB?

 

Audio and composite video most likely.

 

Mitch

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