So.... Some SNESes output YPbPr.....

[Drakon]

Those first screenshots look the same just component is brighter. The colour "difference" is just because it's brighter. I see later wiring things my way seems to have fixed that.

You're all welcome for my idea of using the luma from the multi av port....

As for that circuit in the data sheet it doesn't look like an application circuit to me it looks like a test circuit. Application circuits are how to wire up the encoder for use, test circuits are wiring it up for testing but not regular use. Oh yeah another thing that gives it away is that the circuit in the english datasheet for the 6591 says "test circuit". If you look at datasheets for other encoders like the cxa2075 it will have two circuits a "test circuit" and an "application circuit". The test circuit is wiring for testing parts not for actually using the encoder. What you need is an application circuit which these datasheets don't supply.

[marvelus10]

Thats going to be a problem from many. 240p just was never sent over component outputs.

The SNES/SFC was never meant to be played on an HD Plasma either. It sure looks good without the scan lines though.

[fuctfuct]

[OT] Nanaimo, Canada ! Cool [/OT]

[Jamisonia]

Thats going to be a problem from many. 240p just was never sent over component outputs.

The SNES/SFC was never meant to be played on an HD Plasma either. It sure looks good without the scan lines though.

That is true, it was never meant to be on an HD plasma. I disagree that it looks better though. Too pixelated I feel like.

[Zing]

Maybe someone here can answer this question.

From what I understand, CRT televisions "natively" use Y/C signal for output. That is, every signal coming into the set is converted to Y/C for use by the tube circuitry. We all know that Y/C is what s-video provides.

So, how can someone say "s-video is overrated", when it the native signal of the television?

How can component look better than s-video on a CRT? I understand that in the case of the SNES, it is likely due to essentially outputting the raw RGB (transcoded to component by a chip on the board). However, the TV is just taking that component and converting down to Y/C. I would think that the quality difference between component and s-video from a single device going to a CRT would rely entirely on the ability of circuitry on the device to produce each signal.

[Jamisonia]

Zing I have never read that before. All TVs display everything in RGB. They have either Red, green, and blue pixels, as in the case with new tech, or red, blue, and green phosphors in the case of CRT. In the end everything becomes RGB, because that is how humans see.

[Drakon]

I'm pretty sure TVs display everything in rgb by the time it makes it to the tube. But S-video is NOT overrated. The s-video from my snes 2 looks way better than the component from my model 1 snes.

[Zing]

Maybe the articles I read long ago were based around the original NTSC signal and B&W televisions. I guess I just had a brain fart, as I knew there were three electron guns.

[marvelus10]

Some visuals for those who like pictures.

[Gothmog]

So far its appears to mod your SNES to YPbPr output connect:
Pin 7 on MultiAV output to Component GREEN (This is Y or Luma)
Pin 24 on Video Chip to Component BLUE (This is Pb or the Blue signal)
Pin 1 on Video Chip to Component RED (This is Pr or Red Signal)

Using the information in this thread, I have just successfully modded my Son's old SNES console. This is an Australian PAL model: SNSP-001A(AUS). Motherboard is a dated 1992 version: SNSP-CPU-02 and has a "S-ENC" Chip.

I found the best result was with a 75 ohm resistor in line with Pin7 (Y) on the MultiAV. The other connections (Pb and Pr) did not need a resistor.

Many thanks to all who contributed.

Cheers,

John