NES 2.0 Mapper 369

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NES 2.0 mapper 369 denotes the N49C-300 circuit board, used for the Super Mario Bros. Party multicart. Accordingly, it combines all the mappers used for the various Mario games (including SMB2J): 0, 4 and 40 with an outer bank register. Its UNIF board name is BMC-N49C-300.

Outer Bank register ($4100, write)

Mask: $C100

The meaning of the individual bits is not understood yet. The following values are used:

$4100  PRG offset  CHR offset  Mapper
Value  (8K bank#)  (8K bank#)
-------------------------------------
$00    $00         $00         000: NROM (Mario Bros.)
$01    $01         $01         000: NROM (Super Mario Bros.)
$13    $08         $03         040: NTDEC 2722 (Super Mario Bros. 2J)
$37    $10         $10         004: TLROM (Super Mario Bros. 2), PRG-ROM bank limited to 128 KiB
$FF    $20         $20         004: TKROM (Super Mario Bros. 3), PRG-ROM bank limited to 256 KiB