Begin disassembling window.s

include/gba/macro.h

@@ -27,6 +27,8 @@
 
 #define CpuFastFill16(value, dest, size) CpuFastFill(((value) << 16) | (value), (dest), (size))
 
+#define CpuFastFill8(value, dest, size) CpuFastFill(((value) << 24) | ((value) << 16) | ((value) << 8) | (value), (dest), (size))
+
 #define CpuFastCopy(src, dest, size) CpuFastSet(src, dest, ((size)/(32/8) & 0x1FFFFF))
 
 #define DmaSet(dmaNum, src, dest, control)        \