NES 2.0 Mapper 380 denotes the 970630C (submapper 0) and KN-35A (submapper 1) multicart circuit board mounting 256-512 KiB of PRG-ROM plus 8 KiB of unbanked CHR-RAM.
[A~1... ..Om CRQP PpMS]
|| |||| |||+-0: PRG A14=CPU A14
|| |||| ||| 1: PRG A14=p
|| |||| ||+- 0: Vertical mirroring
|| |||| || 1: Horizontal mirroring
|| |+++-++-- PRG A18..A14
|| +-------- 0: CHR-RAM writeable
|| 1: CHR-RAM write-protected
|+---------- Submapper 0:
| 0: PRG A3..A0=CPU A3..A0
| 1: PRG A3..A0=Solder pad 3-0
| Submapper 1:
| 0: PRG A17=Q if CPU A14=1
| 1: PRG A17=1 if CPU A14=1 (UOROM)
+----------- 0: When CPU A14=1: PRG A16..14=111 (UNROM)
1: When CPU A14=1: PRG A16..14=PPp
Power-on value: 0
Effective meaning:
Bit 9 Bit 8 Bit 0 Meaning $200s $100s $001s (O) (m) (S) 0 0 ? Switchable inner 16 KiB bank PPp at CPU $8000-$BFFF, fixed inner bank #7 at CPU $C000-$FFFF (UNROM) 0 1 ? Switchable inner 16 KiB bank QPPp at CPU $8000-$BFFF, fixed inner bank #15 at CPU $C000-$FFFF (UOROM, submapper 1 only) 1 ? 0 Switchable 32 KiB inner bank PP at CPU $8000-$FFFF (NROM-256) 1 ? 1 Switchable 16 KiB inner bank PPp at CPU $8000-$BFFF, mirrored at CPU $C000-$FFFF (NROM-128)
Categories: Mappers with CHR RAM, Multicart mappers