diff --git a/source/arm11/gpu_cmd_lists.c b/source/arm11/gpu_cmd_lists.c
index a2f19b0..c79b7ee 100644
--- a/source/arm11/gpu_cmd_lists.c
+++ b/source/arm11/gpu_cmd_lists.c
@@ -19,7 +19,6 @@
 #include "types.h"
 #include "drivers/cache.h"
 
-
 // 360x240 without scaling, no filter.
 alignas(16) u8 gbaGpuInitList[1136] =
 {
@@ -803,33 +802,64 @@ alignas(16) u8 gbaGpuList2[448] =
 	0x10, 0x00, 0x0f, 0x00
 };
 
-#define LB_INDEX1 (944/4)
-#define RB_INDEX1 (976/4)
-#define LT_INDEX1 (1008/4)
-#define RT_INDEX1 (1040/4)
+#define LB_INDEX1 (944)
+#define RB_INDEX1 (976)
+#define LT_INDEX1 (1008)
+#define RT_INDEX1 (1040)
 
-#define LB_INDEX2 (256/4)
-#define RB_INDEX2 (288/4)
-#define LT_INDEX2 (320/4)
-#define RT_INDEX2 (352/4)
+#define LB_INDEX2 (256)
+#define RB_INDEX2 (288)
+#define LT_INDEX2 (320)
+#define RT_INDEX2 (352)
 
-static void patchCoord( u32 *initarr, u32 *updatearr )
+static u32 tof24( u32 d )
 {
-	initarr[LB_INDEX1] = updatearr[LB_INDEX2] = 0x3f00003e;
-	initarr[LB_INDEX1+2] = updatearr[LB_INDEX2+2] = 0x4440;
-	initarr[LB_INDEX1+3] = updatearr[LB_INDEX2+3] = 0;
+	if( d == 0 ) return 0;
 
-	initarr[RB_INDEX1] = updatearr[RB_INDEX2] = 0x3f00003e;
-	initarr[RB_INDEX1+2] = updatearr[RB_INDEX2+2] = 0x4440;
-	initarr[RB_INDEX1+3] = updatearr[RB_INDEX2+3] = 0x46e000;
+	u32 c = 0, o = 1, r = 0;
+	// exp
+	for( ; 2*o <= d; o <<= 1 ) ++c;
+	o = 1<<c;
+	d -= o;
+	c += 63;//0b111111
 
-	initarr[LT_INDEX1] = updatearr[LT_INDEX2] = 0x3f00003e;
-	initarr[LT_INDEX1+2] = updatearr[LT_INDEX2+2] = 0x4690;
-	initarr[LT_INDEX1+3] = updatearr[LT_INDEX2+3] = 0;
+	// decimals
+	for(int i=15; d > 0 && i >= 0; --i ){
+		o >>= 1;
+		if( d >= o ) {
+			r |= 1<<i;
+			d -= o;
+		}
+	}
+	return c<<16 | r;
+}
 
-	initarr[RT_INDEX1] = updatearr[RT_INDEX2] = 0x3f00003e;
-	initarr[RT_INDEX1+2] = updatearr[RT_INDEX2+2] = 0x4690;
-	initarr[RT_INDEX1+3] = updatearr[RT_INDEX2+3] = 0x46e000;
+static void xyToWzyx( u16 x, u16 y, u32 *p )
+{
+	u32 f24x = tof24(x);
+	u32 f24y = tof24(y);
+	p[0] = 0x3f00003e;
+	// p[1] 是GPU的寄存器
+	p[2] = f24y >> 8;
+	p[3] = f24y<<24 | f24x;
+}
+
+static void setQuadRect( u16 left, u16 right, u16 top, u16 bottom )
+{
+	if( left >= right || right > 400u  ) return;
+	if( bottom >= top || top > 240u ) return;
+
+	xyToWzyx(left, bottom, (u32*)&gbaGpuInitList[LB_INDEX1]);
+	xyToWzyx(left, bottom, (u32*)&gbaGpuList2[LB_INDEX2]);
+
+	xyToWzyx(right, bottom, (u32*)&gbaGpuInitList[RB_INDEX1]);
+	xyToWzyx(right, bottom, (u32*)&gbaGpuList2[RB_INDEX2]);
+
+	xyToWzyx(left, top, (u32*)&gbaGpuInitList[LT_INDEX1]);
+	xyToWzyx(left, top, (u32*)&gbaGpuList2[LT_INDEX2]);
+
+	xyToWzyx(right, top, (u32*)&gbaGpuInitList[RT_INDEX1]);
+	xyToWzyx(right, top, (u32*)&gbaGpuList2[RT_INDEX2]);
 }
 
 void patchGbaGpuCmdList(u8 scaleType)
@@ -853,7 +883,7 @@ void patchGbaGpuCmdList(u8 scaleType)
 		gbaGpuList2[360] = 0x40u;						// 25
 		gbaGpuList2[365] = 0x40u;						// 25
 */
-		patchCoord( gbaGpuInitList, gbaGpuList2 );
+		setQuadRect( 0, 240, 200, 40 );
 
 		// 以下8行代码修正纹理坐标
 		gbaGpuInitList[968] = 0x60u;					// 74