NES 2.0 Mapper 286 is used for Benshieng multicarts. Its UNIF mapper is BMC-BS-5. The hardware latches the address rather than the data bus bits.
FEDC BA98 7654 3210
-------------------
100. RR.. .... BBBB
|| ++++- Select 8 KiB CHR-ROM bank number
|| in range selected by address bits 8-9
++------------- Select 8 KiB CHR-ROM bank
00: PPU $0000-$07FF
01: PPU $0800-$0FFF
10: PPU $1000-$17FF
11: PPU $1800-$1FFF
The AND mask to which the PRG-ROM select responds is determined in bits 4-7 by a DIP switch.
FEDC BA98 7654 3210
-------------------
101. RR.. DDDD BBBB
|| |||| ++++- Select 8 KiB PRG-ROM bank number
|| |||| in range selected by address bits 8-9
|| ++++------ AND mask from DIP switch
|| 01: Setting #1
|| 02: Setting #2
|| 04: Setting #3
|| 08: Setting #4
++------------- Select 8 KiB PRG-ROM bank
00: CPU $8000-$9FFF
01: CPU $A000-$BFFF
10: CPU $C000-$DFFF
11: CPU $E000-$FFFF
Categories: Multicart mappers