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Map Mode 21
From SnesLab
Map Mode 21 is HiROM. The byte at FFD5h may be 21h for SlowROM or 31h for FastROM in Map Mode 21.
See Also
- Map Mode 20 (LoROM)
- List of HiROM Games
Reference
- page 1-2-17 of Book I of the official Super Nintendo development manual