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Homebrew for Epoch Cassette Vision or Bandai Super Vision?
http://forums.nesdev.com/viewtopic.php?f=23&t=14568
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Author:  Dr.Wily [ Wed Nov 28, 2018 11:07 am ]
Post subject:  Re: Homebrew for Epoch Cassette Vision or Bandai Super Visio

Hello,

There is some thoughts on the real pinout of cassette vision CPU ? I doubt that pin 15 is the composite video signal. When I plug on a TV there is no image. Just a garbled screen.

Author:  lidnariq [ Wed Nov 28, 2018 1:20 pm ]
Post subject:  Re: Homebrew for Epoch Cassette Vision or Bandai Super Visio

Earlier in this thread is the research I did two years ago: viewtopic.php?p=176030#p176030

You probably need an amplifier of some sort to connect the VIDEO pin to a TV; it probably can't directly drive a 75Ω input. The original Cassette Vision used a big pile of transistors and a 4050 hex inverter IC.

Author:  Dr.Wily [ Fri Nov 30, 2018 12:50 pm ]
Post subject:  Re: Homebrew for Epoch Cassette Vision or Bandai Super Visio

Thanks, I already read this topic but pin 15 seem to be luminance not directly composite video.

The purpose is to add composite video to a Cassette Vision jr. who only has RF out.

Author:  lidnariq [ Fri Nov 30, 2018 12:57 pm ]
Post subject:  Re: Homebrew for Epoch Cassette Vision or Bandai Super Visio

Then you'll have to mix luma and chroma. This isn't exactly hard, but you may wish to reverse-engineer what the original mainboard is doing, and find where they're combined, instead of rebuilding it from scratch.

Alternatively, a TV with an S-video input...

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