I found a small bug in the Glide driver which prevents it form detecting 1024x768 graphics mode. To correct this problem change the EnumModes() function located on line 93 in the GlideDrv.c file to the following: geBoolean DRIVERCC EnumModes(int32 Driver, char *DriverName, DRV_ENUM_MODES_CB *Cb, void *Context) { if (g_BoardInfo.MainRam == 0) return GE_TRUE; // No modes if (g_BoardInfo.MainRam >= 1) { if (!Cb(0, "512x384", 512, 384, Context)) return GE_TRUE; } if (g_BoardInfo.MainRam >= 2) { if (!Cb(1, "640x480", 640, 480, Context)) return GE_TRUE; } if (g_BoardInfo.MainRam >= 3) { if (!Cb(2, "800x600", 800, 600, Context)) return GE_TRUE; } if (g_BoardInfo.MainRam > 3) { if (!Cb(3, "1024x768", 1024, 768, Context)) return GE_TRUE; } return GE_TRUE; } After I compiled and replaced the driver, I tested GTEST and this fix worked with out any problems.