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diff --git a/include/libnds/nds/arm9/boxtest.h b/include/libnds/nds/arm9/boxtest.h
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+/*---------------------------------------------------------------------------------
+BoxTest.h -- Code for performing hardware box test against viewing frustrum
+
+Copyright (C) 2005
+Michael Noland (joat)
+Jason Rogers (dovoto)
+Dave Murphy (WinterMute)
+
+This software is provided 'as-is', without any express or implied
+warranty.  In no event will the authors be held liable for any
+damages arising from the use of this software.
+
+Permission is granted to anyone to use this software for any
+purpose, including commercial applications, and to alter it and
+redistribute it freely, subject to the following restrictions:
+
+1.	The origin of this software must not be misrepresented; you
+must not claim that you wrote the original software. If you use
+this software in a product, an acknowledgment in the product
+documentation would be appreciated but is not required.
+
+2.	Altered source versions must be plainly marked as such, and
+must not be misrepresented as being the original software.
+
+3.	This notice may not be removed or altered from any source
+distribution.
+
+
+---------------------------------------------------------------------------------*/
+#ifndef BOX_TEST_INCLUDE
+#define BOX_TEST_INCLUDE
+
+#include <nds/arm9/video.h>
+#include <nds/arm9/videoGL.h>
+
+/*! \file boxtest.h
+\brief Box Test Functions.
+
+*/
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+/*! \fn int BoxTest(v16 x, v16 y, v16 z, v16 width, v16 height, v16 depth)
+\brief Performs a test to determine if the provided box is in the view frustrum.
+\param x (x, y, z) point of a vertex on the box
+\param y (x, y, z) point of a vertex on the box
+\param z (x, y, z) point of a vertex on the box
+\param height (height, width, depth) describe the size of the box referenced from (x, y, z)
+\param width (height, width, depth) describe the size of the box referenced from (x, y, z)
+\param depth (height, width, depth) describe the size of the box referenced from (x, y, z)
+
+\return non zero if any or all of the box is in the view frustum
+*/
+int BoxTest(v16 x, v16 y, v16 z, v16 width, v16 height, v16 depth);
+
+/*! \fn int BoxTestf(float x, float y, float z, float width, float height, float depth)
+\brief Performs a test to determine if the provided box is in the view frustum.
+\param x (x, y, z) point of a vertex on the box
+\param y (x, y, z) point of a vertex on the box
+\param z (x, y, z) point of a vertex on the box
+\param width (width, height, depth) describe the size of the box referenced from (x, y, z)
+\param height (width, height, depth) describe the size of the box referenced from (x, y, z)
+\param depth (width, height, depth) describe the size of the box referenced from (x, y, z)
+
+\return non zero if any or all of the box is in the view frustum
+*/
+int BoxTestf(float x, float y, float z, float width, float height, float depth);
+
+/*! \fn void BoxTest_Asynch(v16 x, v16 y, v16 z, v16 width, v16 height, v16 depth)
+\brief Performs a test to determine if the provided box is in the view frustum.
+\param x (x, y, z) point of a vertex on the box
+\param y (x, y, z) point of a vertex on the box
+\param z (x, y, z) point of a vertex on the box
+\param width (width, height, depth) describe the size of the box referenced from (x, y, z)
+\param height (width, height, depth) describe the size of the box referenced from (x, y, z)
+\param depth (width, height, depth) describe the size of the box referenced from (x, y, z)
+
+Performs a test to determine if the provided box is in the view frustum.  BoxTestResult must be called to get the result of this
+operation.
+*/
+void BoxTest_Asynch(v16 x, v16 y, v16 z, v16 height, v16 width, v16 depth);
+
+/*! \fn void BoxTestf_Asynch(float x, float y, float z, float width, float height, float depth)
+\brief Performs a test to determine if the provided box is in the view frustum.
+\param x (x, y, z) point of a vertex on the box
+\param y (x, y, z) point of a vertex on the box
+\param z (x, y, z) point of a vertex on the box
+\param width (width, height, depth) describe the size of the box referenced from (x, y, z)
+\param height (width, height, depth) describe the size of the box referenced from (x, y, z)
+\param depth (width, height, depth) describe the size of the box referenced from (x, y, z)
+
+Performs a test to determine if the provided box is in the view frustum.  BoxTestResult must be called to get the result of this
+operation.
+*/
+void BoxTestf_Asynch(float x, float y, float z, float width, float height, float depth);
+
+/*! \fn void BoxTestResult(void)
+\brief Gets the result of the last box test.  Needed for asynch box test calls.
+\return non zero if any or all of the box is in the view frustum
+
+*/
+int BoxTestResult(void);
+
+#ifdef __cplusplus
+}
+#endif
+#endif