Are Mapper Revisions tied to certain games?

Are Mapper Revisions tied to certain games?
by 2600 on 2008-08-13 (#35778)

I was curious what the likelihood that a game would require a certain revision of a mapper? i.e. requires MMC3B and won't work on any other revision

Re: Are Mapper Revisions tied to certain games?
by kevtris on 2008-08-15 (#35832)

2600 wrote:

I was curious what the likelihood that a game would require a certain revision of a mapper? i.e. requires MMC3B and won't work on any other revision

None for MMC3 that I know of. A few early famicom MMC1 titles need an A revision MMC1 but that's about it. I can think of "The Money Game" in particular. The earlier MMC1 revs do not support SRAM locking like the later ones do, and the game doesn't unlock the RAM.

by 2600 on 2008-08-15 (#35844)

Thank you, that was exactly the information I was looking for.

by dvdmth on 2008-08-15 (#35853)

From Nestopia changelog, version 1.30:
Code:
- Mapper 4. Now defaulting to MMC3B IRQ hardware. Fixes "Star Trek - 25th Anniversary".

So it appears at lease one MMC3 game requires revision B.