INES Mapper 101: Difference between revisions

From NESdev Wiki
Jump to navigationJump to search
(Momoko has nothing to do with alcohol, I assume)
(Suggestion for new development)
Line 12: Line 12:


This is approximately the same as [[iNES Mapper 087|mapper 87]] but with the bits in order, or the same as [[CNROM]] without bus conflicts.
This is approximately the same as [[iNES Mapper 087|mapper 87]] but with the bits in order, or the same as [[CNROM]] without bus conflicts.
New development should use mapper 101; those who wish to use a mapper 87 donor board can swap banks 1 and 2 of the CHR ROM.

Revision as of 22:46, 16 August 2013

This mapper is used for instance by Urusei Yatsura - Lum no Wedding Bell,the Famicom version of Jaleco's Momoko 120%.

Supported in r3420 BizHawk, r2696 FCEUX (probably has been supported for eons), and reportedly MESS.

Registers:
---------------------------
 $6000-7FFF: [CCCC CCCC]
    C = Selects 8k CHR @ $0000

It's unlikely that more than 2 bits of C exist.

This is approximately the same as mapper 87 but with the bits in order, or the same as CNROM without bus conflicts. New development should use mapper 101; those who wish to use a mapper 87 donor board can swap banks 1 and 2 of the CHR ROM.