SCC-I in Snake's Revenge?

By uberjack

Champion (268)

uberjack의 아바타

28-01-2020, 15:53

So, I was taking apart Snake's Revenge (NES) yesterday, and I came across this:

This isn't THE SCC-I chip, is it?

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By Wild_Penguin

Hero (620)

Wild_Penguin의 아바타

28-01-2020, 17:00

I think it can not be. SCC-I has 48-pin DIL -packate (that seems like a DIL28 package). Also SCC would be labeled "2212P003" or similar (2312P001 for SCC-I?).

https://www.msx.org/wiki/Konami_SCC
https://www.msx.org/wiki/Konami_SCC-I
http://bifi.msxnet.org/msxnet/tech/scc
http://bifi.msxnet.org/msxnet/tech/pinouts.txt

By sdsnatcher73

Paragon (1212)

sdsnatcher73의 아바타

28-01-2020, 17:21

Still weird that they would put that on another chip. Anyway the NES does not support external audio chips (the Japanese Famicom does, but this game had no Japanese release). So it seems unlikely it is a sound chip.

The only possible explanation where it still is would be a sound chip is if they developed the game for Famicom with SCC sound but then did not release it for Famicom but only for NES and left the chip in there because the software would not run without it.

By st1mpy

Hero (563)

st1mpy의 아바타

28-01-2020, 17:54

It might be a ROM mapper chip (SCC minus sound chip).

By Grauw

Ascended (9396)

Grauw의 아바타

29-01-2020, 09:15

It is not an SCC, I’ve seen before that Konami used SCC-I for chips that are not SCC sound chips.

Which is why it is somewhat amusing that some people use SCC-I rather than SCC+ because "SCC+ is a nonofficial name", while really only trading one unofficial name for another Smile. The official name for the SCC+ is Konami Sound Cartridge. Or to refer to the specific chip, the SCC+ is K052539 and the regular SCC is K051649.

By uberjack

Champion (268)

uberjack의 아바타

28-01-2020, 19:46

st1mpy wrote:

It might be a ROM mapper chip (SCC minus sound chip).

The MMC chip is right under it (part of it is visible in the photo), so I don't think it's a mapper.

By gdx

Prophet (3833)

gdx의 아바타

29-01-2020, 09:21

Extra sound chips in Konami's cartridges for Famicom are called VRC.

Castlevania III:

Lagrange points board:

SCC-I chips is a Rom or mapper but by looking Castlevania 3, I think it is the RC8xxJ0x the Rom chip because 14 pins seems to me insufficient for a Rom larger than 128K.

By Rataplan

Master (228)

Rataplan의 아바타

29-01-2020, 12:42

sdsnatcher73 wrote:

Anyway the NES does not support external audio chips

Offtopic, but that's not entirely true. While the cartridge slot had the pin for eadditional audio channels removed, the expansion slot at the bottom of the NES stil has it. There are mods available that allow you to add sound-channels from your cartridge to the NES.

By Parn

Hero (610)

Parn의 아바타

29-01-2020, 13:05

Most NES games have two memory chips: one ROM for the program (called PRG) and one ROM or RAM for the graphics (called CHR). There are other possible configurations, though. I'm sure the "SCC-I" in the first picture is the program ROM, judging by the position on the cartridge and its code RD021N0.3P.

EDIT:

gdx wrote:

SCC-I chips is a Rom or mapper but by looking Castlevania 3, I think it is the RC8xxJ0x the Rom chip because 14 pins seems to me insufficient for a Rom larger than 128K.

You see one of the chips is marked RC845J0.0P and the other is marked RC845J0.1C? P stands for program and C stands for character.