diff --git a/desmume/src/MMU.c b/desmume/src/MMU.c
index e4d7c75ac..c4f390170 100644
--- a/desmume/src/MMU.c
+++ b/desmume/src/MMU.c
@@ -306,7 +306,7 @@ void MMU_clearMem()
 /* the VRAM blocks keep their content even when not blended in */
 /* to ensure that we write the content back to the LCD ram */
 /* FIXME: VRAM Bank E,F,G,H,I missing */
-void MMU_VRAMWriteBackToLCD(u8 block)
+void MMU_VRAMWriteBackToLCD(u32 block)
 {
 	u8 *destination;
 	u8 *source;
@@ -315,6 +315,7 @@ void MMU_VRAMWriteBackToLCD(u8 block)
 	#if 1
 		return ;
 	#endif
+	block = (u8)block;
 	destination = 0 ;
 	source = 0;
 	VRAMBankCnt = MMU_read8(ARMCPU_ARM9,REG_VRAMCNTA+block) ;
@@ -3626,103 +3627,108 @@ INLINE void MMU_write32_REG_3D(u32 adr, u32 val) {
 	case 0x04000400 :
 		OGLRender::glCallList(val);
 		return;
-	case 0x04000440 :
+	case cmd_3D_MTX_MODE :
 		OGLRender::glMatrixMode(val);
 		return;
-	case 0x04000444 :
+	case cmd_3D_MTX_PUSH :
 		OGLRender::glPushMatrix();
 		return;
-	case 0x04000448 :
+	case cmd_3D_MTX_POP :
 		OGLRender::glPopMatrix(val);
 		return;
-	case 0x0400044C :
+	case cmd_3D_MTX_STORE :
 		OGLRender::glStoreMatrix(val);
 		return;
-	case 0x04000450 :
+	case cmd_3D_MTX_RESTORE :
 		OGLRender::glRestore();
 		return;
-	case 0x04000454 :
+	case cmd_3D_MTX_IDENTITY :
 		OGLRender::glLoadIdentity();
 		return;
-	case 0x04000458 :
+	case cmd_3D_MTX_LOAD_4x4 :
 		OGLRender::ML4x4ajouter(val);
 		return;
-	case 0x0400045C :
+	case cmd_3D_MTX_LOAD_4x3 :
 		OGLRender::ML4x3ajouter(val);
 		return;
-	case 0x04000460 :
+	case cmd_3D_MTX_MULT_4x4 :
 		OGLRender::glMultMatrix4x4(val);
 		return;
-	case 0x04000464 :
+	case cmd_3D_MTX_MULT_4x3 :
 		OGLRender::glMultMatrix4x3(val);
 		return;
-	case 0x04000468 :
+	case cmd_3D_MTX_MULT_3x3 :
 		OGLRender::glMultMatrix3x3(val);
 		return;
-	case 0x0400046C :
+	case cmd_3D_MTX_SCALE :
 		OGLRender::glScale(val);
 		return;
-	case 0x04000470 :
+	case cmd_3D_MTX_TRANS :
 		OGLRender::addTrans(val);
 		return;
-	case 0x04000480 :
+	case cmd_3D_COLOR :
 		OGLRender::glColor3b(val);
 		return;
-	case 0x04000488 :
+	case cmd_3D_NORMA :
 		OGLRender::glTexCoord(val);
 		//execute = FALSE;
 		return;
 #endif
-	case 0x0400048C :
+	case cmd_3D_VTX_16 :
 		//OGLRender::glVertex3(val);
+		gl_VTX_16(val);
 		return;
-	case 0x04000490 :
+	case cmd_3D_VTX_10 :
 		//GPULOG("VERTEX 10 %d\r\n",val);
 		gl_VTX_10(val);
 		return;
-	case 0x04000494 :
+	case cmd_3D_VTX_XY :
 		//GPULOG(printf(txt, "VERTEXY %d\r\n",val);
 		gl_VTX_XY(val);
 		return;
-	case 0x04000498 :
+	case cmd_3D_VTX_XZ :
 		//GPULOG("VERTEXZ %d\r\n",val);
 		gl_VTX_XZ(val);
 		return;
-	case 0x0400049C :
+	case cmd_3D_VTX_YZ :
 		//GPULOG("VERTEYZ %d\r\n",val);
 		gl_VTX_YZ(val);
 		return;
-	case 0x040004A0 :
+	case cmd_3D_VTX_DIFF :
 		gl_VTX_DIFF(val);
 		return;
 #ifdef RENDER3D
-	case 0x040004A8 :
+	case cmd_3D_TEXIMAGE_PARAM :
 		OGLRender::glTexImage2D(val, FALSE);
 		//execute = FALSE;
 		testval = val;
 		return;
-	case 0x040004AC :
+	case cmd_3D_PLTT_BASE :
 		OGLRender::glTexImage2D(testval, TRUE);
 		//execute = FALSE;
 		return;
 #endif
-	case 0x04000500 :
+	case cmd_3D_BEGIN_VTXS :
 		// OGLRender::glBegin(val);
 		gl_VTX_begin(val);
 		return;
-	case 0x04000504 :
+	case cmd_3D_END_VTXS :
 		// OGLRender::glEnd();
 		gl_VTX_end();
 		return;
 #ifdef RENDER3D
-	case 0x04000540 :
+	case cmd_3D_SWAP_BUFFERS :
 		OGLRender::glFlush();
 		return;
-	case 0x04000580 :
+	case cmd_3D_VIEWPORT :
 		OGLRender::glViewPort(val);
 		return;
 #endif
 	}
+/*
+	if (adr > 0x4000300 && adr < 0x4000700)
+		printf("command %08x\n", adr);
+*/
 }
 
 
diff --git a/desmume/src/gl_vertex.c b/desmume/src/gl_vertex.c
index 3d8f14bb4..6fc2e9bc4 100755
--- a/desmume/src/gl_vertex.c
+++ b/desmume/src/gl_vertex.c
@@ -25,8 +25,8 @@
 
 static u16 vx=0,vy=0,vz=0;
 
-//#define print(a) printf a
-#define print(a)
+#define print(a) printf a
+//#define print(a)
 
 INLINE void gl_VTX_one() {
 	float vfx,vfy,vfz;
@@ -62,17 +62,28 @@ void gl_VTX_end() {
 	print(("VTX_end.\n"));
 }
 
-
-void gl_VTX_16 (u32 xxyy, u32 zz__) {
+void gl_VTX_16 (u32 val) {
 //see 400048Ch - Cmd 23h - VTX_16 - Set Vertex XYZ Coordinates (W)
-	_VTX_16 xy, z_;
-	xy.val = xxyy;
-	z_.val = zz__;
-	vx = xy.bits.low ;
-	vy = xy.bits.high;
-	vz = z_.bits.low ;
-	gl_VTX_one();
+	_VTX_16 vval;
+	static int vtx_16_nbparams = 0;
+
+	vval.val = val;
+	switch(vtx_16_nbparams) {
+	case 0:
+		vx = vval.bits.low ;
+		vy = vval.bits.high;
+		vtx_16_nbparams++;
+		break;
+	case 1:
+		vz = vval.bits.low ;
+		gl_VTX_one();
+		vtx_16_nbparams=0;
+		break;
+	default:
+		break;
+	}
 }
+
 void gl_VTX_10 (u32 xyz) {
 //see 4000490h - Cmd 24h - VTX_10 - Set Vertex XYZ Coordinates (W)
 	_VTX_10 vt;
diff --git a/desmume/src/gl_vertex.h b/desmume/src/gl_vertex.h
index 437f7a66e..a55d24f90 100755
--- a/desmume/src/gl_vertex.h
+++ b/desmume/src/gl_vertex.h
@@ -53,7 +53,7 @@ void gl_VTX_begin(u32 val);
 void gl_VTX_end();
 //see 4000504h - Cmd 41h - END_VTXS - End of Vertex List (W)
 
-void gl_VTX_16 (u32 xxyy, u32 zz__);
+void gl_VTX_16 (u32 val);
 //see 400048Ch - Cmd 23h - VTX_16 - Set Vertex XYZ Coordinates (W)
 void gl_VTX_10 (u32 xyz);
 //see 4000490h - Cmd 24h - VTX_10 - Set Vertex XYZ Coordinates (W)
diff --git a/desmume/src/registers.h b/desmume/src/registers.h
index 7ac365113..1dd7fa05c 100644
--- a/desmume/src/registers.h
+++ b/desmume/src/registers.h
@@ -249,5 +249,44 @@
 #define REG_DISPA_DISPMMEMFIFO                  0x04000068
 
 
+// 3d commands
+#define cmd_3D_MTX_MODE        0x04000440
+#define cmd_3D_MTX_PUSH        0x04000444
+#define cmd_3D_MTX_POP         0x04000448
+#define cmd_3D_MTX_STORE       0x0400044C
+#define cmd_3D_MTX_RESTORE     0x04000450
+#define cmd_3D_MTX_IDENTITY    0x04000454
+#define cmd_3D_MTX_LOAD_4x4    0x04000458
+#define cmd_3D_MTX_LOAD_4x3    0x0400045C
+#define cmd_3D_MTX_MULT_4x4    0x04000460
+#define cmd_3D_MTX_MULT_4x3    0x04000464
+#define cmd_3D_MTX_MULT_3x3    0x04000468
+#define cmd_3D_MTX_SCALE       0x0400046C
+#define cmd_3D_MTX_TRANS       0x04000470
+#define cmd_3D_COLOR           0x04000480
+#define cmd_3D_NORMA           0x04000484
+#define cmd_3D_TEXCOORD        0x04000488
+#define cmd_3D_VTX_16          0x0400048C
+#define cmd_3D_VTX_10          0x04000490
+#define cmd_3D_VTX_XY          0x04000494
+#define cmd_3D_VTX_XZ          0x04000498
+#define cmd_3D_VTX_YZ          0x0400049C
+#define cmd_3D_VTX_DIFF        0x040004A0
+#define cmd_3D_POLYGON_ATTR    0x040004A4
+#define cmd_3D_TEXIMAGE_PARAM  0x040004A8
+#define cmd_3D_PLTT_BASE       0x040004AC
+#define cmd_3D_DIF_AMB         0x040004C0
+#define cmd_3D_SPE_EMI         0x040004C4
+#define cmd_3D_LIGHT_VECTOR    0x040004C8
+#define cmd_3D_LIGHT_COLOR     0x040004CC
+#define cmd_3D_SHININESS       0x040004D0
+#define cmd_3D_BEGIN_VTXS      0x04000500
+#define cmd_3D_END_VTXS        0x04000504
+#define cmd_3D_SWAP_BUFFERS    0x04000540
+#define cmd_3D_VIEWPORT        0x04000580
+#define cmd_3D_BOX_TEST        0x040005C0
+#define cmd_3D_POS_TEST        0x040005C4
+#define cmd_3D_VEC_TEST        0x040005C8
+
 #endif