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

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bernhs
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Re: So.... Some SNESes output YPbPr.....

Post by bernhs »

Jamisonia wrote:Okay YPbPr from the SNES using Pin 7 for Luma. This made it look a lot better. Its not so washed out but the detail is there. Is so much more enjoyable to play with YPbPr. Its still a little reder. I think I'll add in the 1K Pulldown resistor when I install permanant jacks.


S-video
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YPbPr
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I'd say this mod is essentially there. I believe the pics speak for themselves. YPbPr looks crisper, and better.



hello im frenchi (nc).

and Is that somebody could tried the pin 6 chroma(co), because I found a diagram of scart and the red thread could be also chroma(co) .i cannot tried it. because I have no more supernes.sorry for my english
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Jamisonia
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Re: So.... Some SNESes output YPbPr.....

Post by Jamisonia »

Maybe I misunderstand you, but if I just tapped pin 6 for Chroma I would only have S-video not YPbPr. S-video is native to the system anyway (except the SNES Mini).
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theclaw
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Re: So.... Some SNESes output YPbPr.....

Post by theclaw »

Besides it's very unlikely he'd encounter a SNES Mini. There was no PAL release.
Lum fan.
wwwyzzerdd
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Re: So.... Some SNESes output YPbPr.....

Post by wwwyzzerdd »

marvelus10 wrote:
Jamisonia wrote:
marvelus10 wrote:I have read in other places of people that have trouble running 240p using s-video, now my SFC runs fine with s-video on my plasma but has a bouncing image with component. Is it possible that if the signals are out of sync then I would get this problem and by using capacitors or resistors on the outputs (as others have noted here to sync the colours properly) solve this?



lets test something else. do you have a ps2? do you have ps2 component cables? play a ps1 game on your ps2 via component to your plasma and see what happens.



No unfortunately I do not have a PS2.

I read that new TV's are a little pickier when it comes to signals, so if the modified output of the SFC is not quite right I was thinking this could cause my issue.

My SFC has the S-ENC-B version BA6594AF I have wired mine up using pins 1 and 24 + pin 7 from A/V straight, no resistors or capacitors and it looks awesome.

When I initially did the mod I used pin 23 instead of A/V 7 and had a bright faded picture, (same issue with plasma TV also).

I have been told yes you need caps and resistors and I have been told no you don't. Which is it?

Right now my SFC works beautifully on my CRT through component but for some reason need the satisfaction of seeing it working stable on my plasma as well.


I joined just to say that you are awesome, your post saved me a lot of running around, appreciate that. I have the original SHVC-CPU-01 console with the S-ENC encoder located behind the cart slot. I was able to get perfect component from the encoder to my hdtv without any extra components using the method you have here. Using pins 1 and 24, and pin 7 from the av out. I tried using pin 23 instead of 24 and it just gave me an extreme green picture.

My wiring is kind of messy. I soldered the wires to an extra av out port I took from a busted n64 and hot glued it to the side of the console, because the consoles case has been severely, and I mean SEVERELY damaged, so severe that it has chunks missing, and I dont care about it looking pretty.

I tried to flip the images through photobucket, but i guess it didn't work... just wanted to show that I didn't need to amplify anything. Ignore the dark area going through the center of the screen, one of my back lights burnt out, hardly noticeable in person though.
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Drakon
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Re: So.... Some SNESes output YPbPr.....

Post by Drakon »

If you read far back enough in this thread I'm the one who suggested people grab luma from the av port instead of right off of the chip..
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wwwyzzerdd
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Re: So.... Some SNESes output YPbPr.....

Post by wwwyzzerdd »

Well thank you. I just didn't see anyone else suggest trying pins 1, and 24, instead of 23, that's what I ended up trying to figure out, and that's what ultimately led to my success in doing this mod.
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Drakon
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Re: So.... Some SNESes output YPbPr.....

Post by Drakon »

wwwyzzerdd wrote:Well thank you. I just didn't see anyone else suggest trying pins 1, and 24, instead of 23, that's what I ended up trying to figure out, and that's what ultimately led to my success in doing this mod.

Yeah I suggested it a long while back because people were like "my picture's too dark" and the luma line is shared with s-video anyway. Next thing I know my suggestion became the "standard wiring" and it somehow fixes all sorts of issues people were having.

According to one of my clients some guy on ebay actually tried my snes video encoder bypass mod and apparently it made then annoying translucent bar in the middle of the screen disappear. The snes I did the mod to never had that bar which is why I never realized my mod fixes that problem. A lot of my video circuit ideas seem to clear up other issues as a side effect. If you engineer things properly quite often you'll accidentally clear up other issues. A lot of people have been skeptical about my mods and that's good for them. The people who hired me to mod their systems have shown nothing but amazement at how clean the video looks and how nice the audio sounds.

Simply put, if you're feeding your tv a signal that's too weak chances are you'll have issues. The original component video mod will work fine with encoders that don't require video amps on the outputs, but a lot of snes systems used encoders that do need amps to get the signals strong enough. We should just be glad that the solution to the snes component video is only just an amp, the rgb nes took a lot more effort to get a pixel perfect image.

In most cases these mods start with some guy wiring it up on his console, having it work fine, and then it gets assumed that the mod will work with all of the consoles and all tvs. Luckily all snes systems will already contain the circuit to get the luma to the right strength for whatever encoder is built into the console. The other two lines are just colour, but without a luma signal that's strong enough your tv will have issues. Once you get a stable luma line your picture won't have issues so you'll be able to install colour amps or just turn the colour strength up on your tv.

And still...externally encoding the rgb from a onechip ppu snes into component video will give you a MUUUUUCH sharper picture.. Unfortunately the video encoders found in the onechip ppu snes systems don't generate component video. This's why I never bothered announcing the component video option when I found out about it before someone else discovered it, there's already a better option out there, it just costs more money.
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wwwyzzerdd
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Re: So.... Some SNESes output YPbPr.....

Post by wwwyzzerdd »

yeah, I had issues with pulling directly from the chip, the colors were faded, dark, and somethings wouldn't show up, the mouse cursor in mario paint for example was not there. Id love to get a more crisp picture from the system, but my main reason for doing this mod was so that I could play on my hdtv without lag. And without spending any cash, it was definitely worth doing. Lag, even by a millisecond, is extremely aggravating to me and I don't want to have to keep a big fatass crt in my game room, lol.

I actually have to share a little homemade 7" lcd tv between all my older systems because of lag, and I no longer have to have my snes hooked up to that little screen, and that is awesome to me. 8)

I do definitely appreciate all the effort being put into these mods. Now I just need to get my n64 to run without lag on my tv. I tried the RGB mod and got a picture, but it was all pink, no matter what I tried. I also read somewhere that enabling the built in amplifier in the 64 was bad for the system so I re-soldered the pins, and kept using it in composite
Last edited by wwwyzzerdd on Sat Jun 23, 2012 1:01 am, edited 1 time in total.
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Drakon
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Re: So.... Some SNESes output YPbPr.....

Post by Drakon »

If using component video "gets rid of the lag" then encoding rgb to component would fix that with all systems. The onechip ppu has sharper quality rgb, which is why ever other format also becomes sharper. But if you're looking for something cheaper what you did is the next best solution for sure. Anyway I'm glad my suggestion turned into some kind of awesome fix as I never intended that.

As for the n64 I never liked that system so I've never bothered messing with one.
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wwwyzzerdd
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Re: So.... Some SNESes output YPbPr.....

Post by wwwyzzerdd »

Drakon wrote:If using component video "gets rid of the lag" then encoding rgb to component would fix that with all systems. The onechip ppu has sharper quality rgb, which is why ever other format also becomes sharper. But if you're looking for something cheaper what you did is the next best solution for sure. Anyway I'm glad my suggestion turned into some kind of awesome fix as I never intended that.

As for the n64 I never liked that system so I've never bothered messing with one.


lol, well to each his own, but yeah, big thanks.
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