OVR_WID_TOP_BOTTOM   50 include/video/aty128.h #define OVR_WID_TOP_BOTTOM			0x0238
OVR_WID_TOP_BOTTOM   78 include/video/mach64.h #define OVR_WID_TOP_BOTTOM	0x0048	/* Dword offset 0_12 */
OVR_WID_TOP_BOTTOM  168 include/video/radeon.h #define OVR_WID_TOP_BOTTOM                     0x0238