QQ2440的那块NEC屏的以下的值该怎么设啊
VarInfo.xres_virtual = VarInfo.xres = 1280;
VarInfo.yres_virtual = VarInfo.yres = 1024;
VarInfo.pixclock = 7408;
VarInfo.left_margin = 248;
VarInfo.right_margin = 16;
VarInfo.upper_margin = 38;
VarInfo.lower_margin = 1;
VarInfo.hsync_len = 144;
VarInfo.vsync_len = 3;
从哪里可以找到这些值的大小