NES 2.0 Mapper 411

NES 2.0 Mapper 411 denotes the A88S-1 multicart circuit board. It is yet another MMC3-compatible chipset with outer bank registers and an NROM mode.

• 1997 Super 7-in-1 (JY-201)
• 1997 Super 6-in-1 (JY-202)
• 1997 Super 7-in-1 (JY-203)
• 1997 龍珠武鬥會 7-in-1 (JY-204)
• 1997 Super 7-in-1 (JY-205)
• 1997 Super 7-in-1 (JY-206)

Registers

Register 1 ($5FF0, write)

Mask: unknown, probably $F001

D~7654 3210
  ---------
  1M.c BCnA
   | | |||+- PRG A14 in NROM-128 mode
   | | ||+-- NROM mode type
   | | ||     0: PRG A14=A (NROM-128)
   | | ||     1: PRG A14=CPU A14 (NROM-256)
   | | |+--- PRG A16 in NROM mode
   | | +---- PRG A15 in NROM mode
   | +------ CHR A18
   +-------- PRG banking mode (PRG A13-A16 source)
              0: MMC3
              1: NROM (bits A-C, CPU A13)
Power-on value: $80

Yes, the PRG A15/A16 bits are really in that order.

Register 2 ($5FF1, write)

Mask: unknown, probably $F001

D~7654 3210
  ---------
  1p.. PCM.
   |   ||+-- PRG A17/CHR A17 source
   |   ||     0: PRG A17=P, CHR A17=C (128 KiB inner PRG and CHR bank)
   |   ||     1: from MMC3 (256 KiB inner PRG and CHR bank)
   |   |+--- CHR A17 if M=0
   |   +---- PRG A17 if M=0
   +-------- PRG A18
Power-on value: $82