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SMW Memory Map

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RAM Address Length Type Description Details
$7E0420 128 bytes Sprites OAM extra bits table, with one byte per OAM tile. Used to generate the packed table at $0400 during the routine at $008494.

Format: %000000SX
  • S - Size. Generally, 0 = 8x8, 1 = 16x16.
  • X - Bit 9 of the tile's X position. Used to allow tiles to be positioned beyond the left edge of the screen.
  • All other bits must remain 0.

Sprites can either manually write the necessary information here, or they can use the routine at $01B7BE to take care of it.
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