Easy SNES/SFC YUV component video!

[Lastcallhall]

I just use an oscillator.

[villahed94]

Does it produce any interference in SVideo or composite?

[GohanX]

I had also asked for a quote for the RP2C03B as well (for NES mods)

That's the Playchoice PPU, right? If you could find a cheap source for those...wow.

[Lastcallhall]

Does it produce any interference in SVideo or composite?

Not in any of the applications I've used it in.

That's the Playchoice PPU, right? If you could find a cheap source for those...wow.

Yes sir. That was my initial reaction when I found them on the site. I was so bummed when they came back with a quote for 0 parts. I did ask them to let me know if they ever get the parts back in stock so I'll post here if that's the case.

[Ace]

I was quoted for the standard RP2C02 (D revision) for $20 per chip (this is for just 1 chip - if you buy 10, they're $15 each). Those Ricoh parts don't come cheap and I expect the RP2C03B to cost just as much, if not more.

[Lastcallhall]

Still, it's a) cheaper than buying a PC-10 or Tennis/Duckhunt board and b) you don't have to gut an original PC-10 board to get it.

[Ace]

Who's to say UTSource isn't gutting those boards for their RP2C03Bs to begin with? That may be why they don't have any RP2C03Bs in stock: they ran out of PCBs to get the RP2C03Bs from. Some of the YM2413s I got from them were used (they had noticeably bent pins and dust on them).

On that note, beware of fake Yamaha chips. These guys have a lot of them. I ended up with 4 fake YM2413s and a fake YM2413B from UTSource (on top of a faulty genuine Yamaha chip).

[TrekkiesUnite118]

Whats the difference between the fake ones and the real ones?

[Lastcallhall]

Who's to say UTSource isn't gutting those boards for their RP2C03Bs to begin with? That may be why they don't have any RP2C03Bs in stock: they ran out of PCBs to get the RP2C03Bs from. Some of the YM2413s I got from them were used (they had noticeably bent pins and dust on them).

On that note, beware of fake Yamaha chips. These guys have a lot of them. I ended up with 4 fake YM2413s and a fake YM2413B from UTSource (on top of a faulty genuine Yamaha chip).

You raise an interesting point. I just assumed they were on the up and up as far as chip suppliers go.

[villahed94]

Who's to say UTSource isn't gutting those boards for their RP2C03Bs to begin with? That may be why they don't have any RP2C03Bs in stock: they ran out of PCBs to get the RP2C03Bs from. Some of the YM2413s I got from them were used (they had noticeably bent pins and dust on them).

On that note, beware of fake Yamaha chips. These guys have a lot of them. I ended up with 4 fake YM2413s and a fake YM2413B from UTSource (on top of a faulty genuine Yamaha chip).

What about YM2151s?

[Ace]

TmEE let me know of multiple Yamaha chips for which there are fakes floating around:

-YM2413
-YM2612
-YM3438
-YM2151
-YM3812
-YMF262

Some fake Yamaha DACs exist as well such as the YM3012. If you have YM2151s on hand, let me see them and I'll tell you if they're fake or not.

Whats the difference between the fake ones and the real ones?

It's mainly the percussion that's different. The main notes are pretty much identical, but the percussion comes out wrong. An example is the Space Harrier theme in the v2.1 Master System BIOS. The percussion on a real YM2413 sounds like a smooth, elongated hit whereas the fake YM2413 outputs the percussion as a hard, high-frequency smack sound. Some instruments are quieter on the fake YM2413s too. The fakes I have were made in 1993, 1998 (3 of them) and 2001 (YM2413B). They're also very noisy compared to the real chips (MUCH higher noise floor).

[villahed94]

OK, I'll take pics of them later...

[Jamisonia]

I want to clear up some misconeptions in this thread about the S/PDIF mod. The chip used is the CS8406 chip, it does take digital audio from the SNES and format it to the S/PDIF standard. I have done it, here are pics:

http://www.racketboy.com/forum/viewt...p?f=25&t=32570

Yes the audio does sound better. It has greater dynamic range, slightly more clarity, and no 60hz hum thats in the analog audio. The better your equipment, the more of a difference you will notice. A word of caution. The SNES outputs a digital signal at 31.5 kHz. The standard is 32 kHz. This means there's a possibility your receiver will not accept the SNES digital output. This problem is also why we cannot mod the N64 for S/PDIF, because it outputs a bunch of wild sample rates.


I have also completed the YPbPr mod on my SNES. Mine has an S-ENC chip. At racketboy we have concluded that any SNES chip before the S-RGB is compatible with this mod. Some chips appear to perform better than others, and its possible in the end there will be several versions of this modfication depending on your S-ENC chip. Here's that thread:

http://www.racketboy.com/forum/viewt...37716&start=80

[Guntz]

The chip used in this guide, the CS8405A-CS, is an ADC-type audio chip. It takes analog and converts it to digital...

[Jamisonia]

The datasheets for both chips are very clear. The CS8405A accepts audio and digital data, which is then multiplexed, encoded and driven onto a cable.

http://pdf1.alldatasheet.com/datashe...S/CS8405A.html

The CS8406 is just and updated version. The original chip the mod uses is impossible to find these days.