NES 2.0 Mapper 338
NES 2.0 mapper 338 is used for a 16-in-1 and a 200/300/600/1000-in-1 multicart. Its UNIF board name is BMC-SA005-A.
Mask: $8000
A~FEDC BA98 7654 3210
-------------------
1... .... .... MBBB
++++- Select 16 KiB PRG-ROM bank at CPU $8000-$BFFF and $C000-$FFFF
| and 8 KiB CHR-ROM bank at PPU $0000-$1FFF
+---- Select nametable mirroring type
0: Horizontal
1: Vertical
INES Mapper 200 is similar but with the mirroring bit’s meaning flipped, and the mirroring bit being also used as a fourth bank bit.