diff --git a/gpu/source/test.vsh b/gpu/source/test.vsh
new file mode 100644
index 0000000..e674bcd
--- /dev/null
+++ b/gpu/source/test.vsh
@@ -0,0 +1,43 @@
+; setup constants
+	.const 5, 0.0, 1.0, 2.0, 3.0
+
+; setup outmap
+	.out o0, result.position
+	.out o1, result.color
+	.out o2, result.texcoord0
+	.out o3, result.texcoord1
+	.out o4, result.texcoord2
+
+; setup uniform map (not required)
+	.uniform 0x10, 0x13, mdlvMtx
+	.uniform 0x14, 0x17, projMtx
+
+;code
+	main:
+		; result.pos = mdlvMtx * in.pos
+		dp4 d40, d40, d00 (0x0)
+		dp4 d40, d41, d00 (0x1)
+		dp4 d40, d42, d00 (0x2)
+		mov d40, d25 (0x4)
+		; result.pos = projMtx * in.pos
+		dp4 d00, d44, d40 (0x0)
+		dp4 d00, d45, d40 (0x1)
+		dp4 d00, d46, d40 (0x2)
+		dp4 d00, d47, d40 (0x3)
+		; result.color = in.pos
+		mov d04, d25 (0x5)
+		; result.texcoord = const
+		mov d08, d25 (0x5)
+		mov d0C, d25 (0x5)
+		mov d10, d25 (0x5)
+		flush
+		end
+	endmain:
+
+;operand descriptors
+	.opdesc x___, xyzw, xyzw ; 0x0
+	.opdesc _y__, xyzw, xyzw ; 0x1
+	.opdesc __z_, xyzw, xyzw ; 0x2
+	.opdesc ___w, xyzw, xyzw ; 0x3
+	.opdesc ___w, yyyy, xyzw ; 0x4
+	.opdesc xyzw, xyzw, xyzw ; 0x5
diff --git a/libctru/include/ctr/GX.h b/libctru/include/ctr/GX.h
index 35b0428..45e3e3c 100644
--- a/libctru/include/ctr/GX.h
+++ b/libctru/include/ctr/GX.h
@@ -7,6 +7,7 @@ Result GX_RequestDma(u32* gxbuf, u32* src, u32* dst, u32 length);
 Result GX_SetCommandList_Last(u32* gxbuf, u32* buf0a, u32 buf0s, u8 flags);
 Result GX_SetMemoryFill(u32* gxbuf, u32* buf0a, u32 buf0s, u32 buf0d, u16 width0, u32* buf1a, u32 buf1s, u32 buf1d, u16 width1);
 Result GX_SetDisplayTransfer(u32* gxbuf, u32* inadr, u32 indim, u32* outadr, u32 outdim, u32 flags);
+Result GX_SetTextureCopy(u32* gxbuf, u32* inadr, u32 indim, u32* outadr, u32 outdim, u32 size, u32 flags);
 Result GX_SetCommandList_First(u32* gxbuf, u32* buf0a, u32 buf0s, u32* buf1a, u32 buf1s, u32* buf2a, u32 buf2s);
 
 #endif
diff --git a/libctru/source/GX.c b/libctru/source/GX.c
index 18ac5dd..1767b1f 100644
--- a/libctru/source/GX.c
+++ b/libctru/source/GX.c
@@ -61,6 +61,21 @@ Result GX_SetDisplayTransfer(u32* gxbuf, u32* inadr, u32 indim, u32* outadr, u32
 	return GSPGPU_submitGxCommand(gxbuf, gxCommand, NULL);
 }
 
+Result GX_SetTextureCopy(u32* gxbuf, u32* inadr, u32 indim, u32* outadr, u32 outdim, u32 size, u32 flags)
+{
+	u32 gxCommand[0x8];
+	gxCommand[0]=0x04; //CommandID
+	gxCommand[1]=(u32)inadr;
+	gxCommand[2]=(u32)outadr;
+	gxCommand[3]=size;
+	gxCommand[4]=indim;
+	gxCommand[5]=outdim;
+	gxCommand[6]=flags;
+	gxCommand[7]=0x0;
+
+	return GSPGPU_submitGxCommand(gxbuf, gxCommand, NULL);
+}
+
 Result GX_SetCommandList_First(u32* gxbuf, u32* buf0a, u32 buf0s, u32* buf1a, u32 buf1s, u32* buf2a, u32 buf2s)
 {
 	u32 gxCommand[0x8];
diff --git a/libctru/source/SHDR.c b/libctru/source/SHDR.c
index 1b04e76..e04d5d3 100644
--- a/libctru/source/SHDR.c
+++ b/libctru/source/SHDR.c
@@ -53,12 +53,12 @@ DVLB_s* SHDR_ParseSHBIN(u32* shbinData, u32 shbinSize)
 }
 
 //hm
-static inline minu8(u8 a, u8 b)
+static inline u8 minu8(u8 a, u8 b)
 {
 	if(a<b)return a;
 	return b;
 }
-static inline maxu8(u8 a, u8 b)
+static inline u8 maxu8(u8 a, u8 b)
 {
 	if(a<b)return b;
 	return a;