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Map Mode 20
From SnesLab
Map Mode 20 is LoROM. The byte at FFD5h may be 20h for SlowROM or 30h for FastROM in Map Mode 20.
In LoROM, information is stored in only 32K of each bank of cartridge ROM.
Use LoROM if you want to be able to access ROM and the system area without switching banks.
See Also
- Map Mode 21 (HiRom)
- List of LoROM Games
Reference
- page 1-2-17 of Book I of the official Super Nintendo development manual