M CHANGES → CHANGES

@@ -29,6 +29,7 @@ - GB Audio: Fix serialization of channel 3 and NR52 properties
  - GB: Properly initialize sramRealVf variable
  - Qt: Fix Apply button for key and controller configurations
  - GB Video: Initialize LCDC in renderer
+ - GBA I/O: Mask off WAITCNT bits that cannot be written
 Misc:
  - PSP2: Improved controller rumble
  - GB, GBA: Prevent loading null ROMs

M src/gba/io.c → src/gba/io.c

@@ -530,6 +530,7 @@ break;
 
 		// Interrupts and misc
 		case REG_WAITCNT:
+			value &= 0x5FFF;
 			GBAAdjustWaitstates(gba, value);
 			break;
 		case REG_IE: