NES 2.0 Mapper 443 denotes the NC3000M multicart circuit board.
Known cartridges:
Mask: $E000
A~FEDC BA98 7654 3210
-------------------
011. .... ...P MMpC
| |||+- CHR A18
| ||+-- PRG A18
| ++--- Select PRG-ROM mode
| 0: MMC3 mode
| 1: NROM-256 mode (PRG A13..14=CPU A13..14, PRG A15..16=MMC3 A15..16)
| 2: Read solder pads' value in D0/D1 (leftmost pads in picture)
| 3: NROM-128 mode (PRG A13=CPU A13, PRG A14..16=MMC3 A14..16)
+------ PRG A17
Mask: $E001
See MMC3.
Categories: Mappers with scanline IRQs, MMC3-like mappers, Multicart mappers