Mapper 112:
          same as MMC3 but 8001->A000
          command change
          MMC3             Mapper112
           0                   2
           1                   3
           2                   4
           3                   5
           4                   6
           5                   7
           6                   0
           7                   1
Mapper 114:
           same as MMC3
           but must write $6000:0 to initialize

Mapper 115:same as Mapper 114
           but dump second 256K Chrdata you must write $6001:0->first  256K
                                                       $6001:1->Second 256K
Mapper 117:$8000-$8002 for 8000-9FFF,A000-BFFF,C000-DFFF
           $A000-$A007 for 000-3ff,400-7ff,800-bff,c00-fff

Mapper 122:
           --CC-CC-
           C=Char
Mapper 225-228:check Mark's Document!
