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Map Mode 22
From SnesLab
Map Mode 22 is a CPU map mode that was reserved for future use by Nintendo. It is used by the Super MMC. Some of the features are:
- ROM bank switching
- ROM image projection
- Backup RAM
- Protection of backup data
- Control registers
References
- page 1-2-17 of Book I of the official Super Nintendo development manual
- paragraph 3.3 on page 1-3-3 of Book II, lbid.