INES Mapper 101

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

This is the same as mapper 87 but with the bits in order, or the same as CNROM without bus conflicts.

This mapper seems to have been erroneously allocated. It seems to be a naive misdumping of the JF-10 board that contains Urusei Yatsura. JF-10 is identical to JF-09, which is the only mapper 87 game with 32KiB CHR. Both JF-10 and JF-09 only differ from all their predecessors (JF-05, -06, -07, and -08) by the addition of a single trace. In short, either mapper 87 should be capped to 16KiB CHR, or mapper 101 never had a hardware instantiation.