3rd Party Ricoh RP2C02G-0 for PPU

[daskrabs]

If I can find a Chinese vendor for NOS Ricoh RP2C02G-0 chips, would there be any trouble with using one in an NES/FC for PPU?

[Memblers]

No problem if it's a legit part. More than likely, it's going to be a re-marked part. Then there's no telling what you're actually getting. If there's a picture, I might be able to tell.

A while back on ebay I bought a RP2A03E, I could tell it was fake by the picture, but I tried it anyways to see what it actually was. Turns out it's a PAL version CPU, probably a clone.

If you do find legit CPUs and PPU, I could use some.

[thefox]

A while back on ebay I bought a RP2A03E, I could tell it was fake by the picture, but I tried it anyways to see what it actually was. Turns out it's a PAL version CPU, probably a clone.

Somebody talked about a fake RP2A03E on IRC a couple of days ago as well. He bought it from Ebay. I don't think it was verified but there was some speculation that it may have been a Dendy-like CPU (clock divider 15).

Just thought I'd mention that.

[Memblers]

That's interesting. Since I dropped it into an NTSC NES, I wasn't sure what effects to expect. But it was kinda funny, I remember trying TMNT3 and the gameplay would slow way down when a couple enemies were on the screen. And the intro to Tecmo Super Bowl, the graphics were completely messed up. And the sound pitch was higher.

[daskrabs]

Are these fake?

[Quietust]

I'm guessing fake - those chips have two pin-1 indicators (an edge dimple and a corner dot, compared to a real RP2C02G having only the former), and the label uses a different font (0 narrower than C, date code wider than usual).

Compare to real chips here (where the date code consistently fits beneath the "2C02G").

[Memblers]

I think they're fake too, in the second pic you can tell they've been painted. Look at the 2 round indentations, those are use to eject the plastic from the mold. Those are normally smooth, or at least not the same texture as the rest of the part.

[ccovell]

People in the C-64 world are experiencing the same thing with re-painted broken SIDs or even fake SIDs!

[alphamule]

I remember on GBATemp, we had to compare each other's results with specific sellers... who were encouraged to come there because no one wanted to deal with some fly-by-night random nobody with no sales history. You pretty much have to get this kind of stuff directly from the manufacturer, but good luck with that on ~30yo technology.