Re: RGB on SNES... I got one of them! Question is... how do it working on a PAL SNES?

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This message was posted by Mark, posted on May 08, 2001 at 16:25:01 coming from 62.189.34
This message is a reply to RGB on SNES... I got one of them! Question is... how do it working on a PAL SNES? posted from Saeba posted at May 07, 2001 at 17:17:28
> According to www.gamesx.com PAL SNES's output pin number 3 gives 11 V instead of composite in NTSC consoles.
> I'm afraid of broking down my TV if I plug the scart (one of the pins (probably 20 (I don't know what it it)) is at +11V). Have I to cut it off from the scart in order to get a RGB working... or another better solution? Or the cable works now? (I didn't test it indeed).

Just a minor correction: pin 3 of the multi-out connector of NTSC consoles carries composite *sync*, not composite video.

As far as I know, all SNES SCART cables connect the composite video signal, not pin 3. (Otherwise the lead would *only* give an RGB picture; you could not use it on a TV with non-RGB-capable SCART input.)

So supplying 11V to the video/sync pin of the SCART connector isn't really an issue.

For what it's worth, a genuine Nintendo RGB/SCART cable uses the 11V and a couple of transistors to implement function switching, whereby your TV automatically switches to AV/RGB mode when you turn the console on, and back again when you turn it off. It should be possible to modify a third-party lead for function switching by using a voltage-doubling IC.

-- Mark

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Message	> > According to www.gamesx.com PAL SNES's output pin number 3 gives 11 V instead of composite in NTSC consoles. > > I'm afraid of broking down my TV if I plug the scart (one of the pins (probably 20 (I don't know what it it)) is at +11V). Have I to cut it off from the scart in order to get a RGB working... or another better solution? Or the cable works now? (I didn't test it indeed). > Just a minor correction: pin 3 of the multi-out connector of NTSC consoles carries composite sync, not composite video. > As far as I know, all SNES SCART cables connect the composite video signal, not pin 3. (Otherwise the lead would only give an RGB picture; you could not use it on a TV with non-RGB-capable SCART input.) > So supplying 11V to the video/sync pin of the SCART connector isn't really an issue. > For what it's worth, a genuine Nintendo RGB/SCART cable uses the 11V and a couple of transistors to implement function switching, whereby your TV automatically switches to AV/RGB mode when you turn the console on, and back again when you turn it off. It should be possible to modify a third-party lead for function switching by using a voltage-doubling IC. > > -- Mark
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