M CHANGES → CHANGES

@@ -5,6 +5,7 @@ Bugfixes:
  - LR35902: Fix core never exiting with certain event patterns
  - GB Timer: Improve DIV reset behavior
  - GBA Memory: Fix misaligned BIOS reads
+ - GBA BIOS: Fix MidiKey2Freq BIOS reads
 Misc:
  - SDL: Remove scancode key input
  - GBA Video: Clean up unused timers

M src/gba/bios.c → src/gba/bios.c

@@ -244,7 +244,12 @@ }
 
 static void _MidiKey2Freq(struct GBA* gba) {
 	struct ARMCore* cpu = gba->cpu;
+
+	int oldRegion = gba->memory.activeRegion;
+	gba->memory.activeRegion = REGION_BIOS;
 	uint32_t key = cpu->memory.load32(cpu, cpu->gprs[0] + 4, 0);
+	gba->memory.activeRegion = oldRegion;
+
 	cpu->gprs[0] = key / powf(2, (180.f - cpu->gprs[1] - cpu->gprs[2] / 256.f) / 12.f);
 }