NES 2.0 Mapper 281

NES 2.0 Mapper 281 denotes a number of compatible circuit boards from J.Y. Company:

• 512 KiB PRG-ROM, 512 KiB CHR-ROM: YY841144C, YY850771C, YY851115C, YY860416C, YY860417C, YY860731C
• 1 MiB PRG-ROM, 1 MiB CHR-ROM: YY850719C

and is used for the following multicarts:

• 1996 Super HiK 4-in-1 (JY-052)
• 1997 Super HiK 4-in-1 (JY-052)
• 1996 Super HiK 4-in-1 (JY-053)
• 1996 Super HiK 4-in-1 (JY-054)
• 1997 Super HiK 4-in-1 (JY-054)
• 1996 Super HiK 4-in-1 (JY-055)
• 1996 Power Rangers HiK 4-in-1 (JY-066)
• 1997 Power Rangers HiK 4-in-1 (JY-066)
• 1996 Super HiK 3-in-1 (JY-068)
• 1996 Super HiK 3-in-1 (JY-080)
• 1996 Super HiK 5-in-1 (JY-088)

It uses the J.Y. Company ASIC.

Outer Bank Register ($D003)

Mask: $F003

7654 3210
---- ----
.... ..BB
       ++- PRG/CHR A18/A19 (256 KiB outer PRG/CHR-ROM bank)

PRG ($8000-$8FFF) and CHR ($9000-$AFFF) bank select register bits that select 256 KiB banks are masked off.

For a description of all other registers, see J.Y. Company ASIC.