What causes Alfredo and Jigsaw to fail on most emulators?

Discuss emulation of the Nintendo Entertainment System and Famicom.

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puppydrum64
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What causes Alfredo and Jigsaw to fail on most emulators?

Post by puppydrum64 » Wed May 12, 2021 9:04 pm

From what I understand these two Action 52 games don't boot on the actual cartridge either. They'll run on NESCafe and NESten but not on everything. Has anyone figured out why?
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Gilbert
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Re: What causes Alfredo and Jigsaw to fail on most emulators?

Post by Gilbert » Wed May 12, 2021 10:12 pm

TCRF has some information for this masterpiece.

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Dwedit
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Re: What causes Alfredo and Jigsaw to fail on most emulators?

Post by Dwedit » Fri May 14, 2021 7:08 am

That's not really information, it's just saying that both buggy games are on the same bank.
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FrankWDoom
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Re: What causes Alfredo and Jigsaw to fail on most emulators?

Post by FrankWDoom » Fri May 14, 2021 5:02 pm

There are a couple bytes that are "mastered" wrong in the roms for lack of a better term. Rom dumps can be patched to fix the bytes for emulators. There is an old thread around here where someone debugged it and provided the offsets.

Its not all carts fyi, the earlier(?) release plays fine as it dont have the same issue.

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