NES 2.0 Mapper 302 is used for Kaiser's ROM cartridge conversion of the Japanese Famicom Disk System version of Gyruss. Its UNIF board name is UNL-KS7057.
Mask: unknown, probably $E000
D~7654 3210
---------
.... ...M
+- Select nametable mirroring type
0: Vertical
1: Horizontal
Mask: unknown, probably $F003
A~FEDC BA98 7654 3210
-------------------
1RRR .... .... ..RN
||| |+- 0: Select low nibble
||| | 1: Select high nibble
+++-------------+-- Select register number
$B000/$B001: Set 2 KiB PRG-ROM bank at CPU $8000-$87FF
$B002/$B003: Set 2 KiB PRG-ROM bank at CPU $8800-$8FFF
$C000/$C001: Set 2 KiB PRG-ROM bank at CPU $9000-$97FF
$C002/$C003: Set 2 KiB PRG-ROM bank at CPU $9800-$9FFF
$D000/$D001: Set 2 KiB PRG-ROM bank at CPU $6000-$67FF
$D002/$D003: Set 2 KiB PRG-ROM bank at CPU $6800-$6FFF
$E000/$E001: Set 2 KiB PRG-ROM bank at CPU $7000-$77FF
$E002/$E003: Set 2 KiB PRG-ROM bank at CPU $7800-$7FFF
Categories: FDS conversion mappers