Currently not actually used

This is used to signal sleep mode starting or ending.

HUC1 */

HUC3 */

HUC3 */

MBC0 */

MBC1 */

MBC2 */

MBC3 */

MBC3 */

MBC5 */

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1 frame delay

2 frames delay

Private function used for simple submenus

Callback for hyperSound / Sound Fix, which works with arm9 to synchronize sound to the cycle.

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