How to Change Sound from MMCxy to VRC6?

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04-26-24 04:06 PM

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Main - ROM Hacking - How to Change Sound from MMCxy to VRC6?

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GameGenie81

Posted on 08-21-08 12:06 PM (rev. 3 of 08-21-08 12:08 PM)

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How do I reprogram the sound shades on such Konami games like Where in Time is Carmen Sandiego? and Castlevania III: Dracula's Curse which use the Nintendo-made MMCxy sound chip (where "x" is any generation number from 2 to 6; and "y" being any revision within the chip's design generation) to the Konami-exclusive VRC chip used on the Japanese equivalent of CIII: DC (called Akumajou Densetsu)?

On a related note, the NA/EU version of Castlevania II: Simon's Quest uses the MMC1 sound chip, but the Japanese equivalent Dracula II: Noroi no Fuin, which was a Famicom Disk System title (and thus not cartridge-based), used the FDS-exclusive sound expansions.

In other words, how do I reprogram Where in Time to make it have the sound capabilities of the VRC6?

~Ben

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Dan

Posted on 08-21-08 03:42 PM

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You'd need to change the mapper, rewrite all the mapper specific code, and rewrite all the sound related code. It's totally possible. (If you have an intimate knowledge of the stuff I listed)

But good luck, as you'll need it.

Main - ROM Hacking - How to Change Sound from MMCxy to VRC6?

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