NES 2.0 Mapper 301 is used for GG1 multicarts. Its UNIF board name is BMC-8157.
Mask: $8000
A~FEDC BA98 7654 3210
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.... ..PD POOI IIM.
|| |||| ||+- Select nametable mirroring type
|| |||| || 0: Vertical
|| |||| || 1: Horizontal
|| |||+-++-- Select 16 KiB inner PRG-ROM bank at CPU $8000-$BFFF
|| |++------ Select 128 KiB outer PRG-ROM bank
+|-+-------- Select 16 KiB inner PRG-ROM bank at CPU $C000-$FFFF
| 0: bank 0
| 1: same as CPU $8000-$BFFF (NROM-128)
| 2/3: bank 7 (UNROM)
+---------- Select 512 KiB outer PRG-ROM bank
Categories: Multicart mappers