SCC vs. non-SCC Konami ROM Images in TOSEC

Door deepshell

Resident (49)

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21-10-2019, 15:44

I'm a bit confused about the different ROM images of the Konami games that are in the TOSEC collection. There's for example "Space Manbow (1989)(Konami)(JP)[RC-768].rom" and "Space Manbow (1989)(Konami)(JP)[SCC][RC-768].rom". Could anyone please explain to me what the difference between those two is? And which one should I be using when running from the "MegaFlashROM SCC+ SD"?

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Van Meits

Scribe (5659)

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21-10-2019, 16:01

Not sure, but you can test both and see if the experience differs.

Van Manuel

Ascended (15832)

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21-10-2019, 21:26

Or use a more reliable source, like GoodMSX, which aims to contain only unmodified dumps.

Van deepshell

Resident (49)

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22-10-2019, 09:08

Ah, very interesting. I didn't know about that one...

Van gdx

Prophet (3090)

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22-10-2019, 10:39

The difference between those two version is 7 bytes in data. These changes are probably minor.
I don't know if the second version is original or not.

Van K72itNET

Supporter (8)

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22-10-2019, 12:11

In theory, roms with (SCC) are mapped to ASCII8 and have the ability to use an SCC cartridge in the 2nd slot.

For example flash game TOSEC [SCC] in a ascii 8 Repo Cartridge (which does not have the SCC sound chip).
Insert the cartridge into slot 1 and a konami SCC game in slot 2 the game works with SCC audio.

The TOSEC without [SCC] are original Konami5 (Konami SCC) mapper. Use these with cartridges with SCC chip on board (MegaFlashRom SCC, Carnivore2, Etc)

Van gdx

Prophet (3090)

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22-10-2019, 15:01

You are right K72itNET. The version with 7 different bytes in data has SHA1=9447e50d1266b7cb96a414eaf9ee16c0f99e55f3.
The version mapped to ASCII8 and have the ability to use an SCC cartridge in the 2nd slot has SHA1=e388e8d8546e329d2c58269d4fa026624a640f1b.