NES 2.0 Mapper 376 denotes J.Y. Company's YY841155C circuit board, used for one one known multicart:
Similarly to NES 2.0 Mapper 361, it uses an MMC3 clone with two outer bank registers at $7000/$7001. This variant adds an NROM PRG mode.
Mask: $F001
D~7654 3210
---------
UaV. .bbb
||| +++- In NROM mode: PRG A14..16
|+|------- PRG/CHR A17
+-+------- UV PRG banking mode
--------------------
10 NROM-128
11 NROM-256
0x MMC3
Regardless of the PRG banking mode, CHR-ROM A10..A16 will come from the MMC3.
Mask: $F001
D~7654 3210
---------
.... ...B
+- PRG/CHR A18
Categories: Mappers with scanline IRQs, MMC3-like mappers, Multicart mappers