On Mon, 8 Jul 2002, Berge, Harry ten wrote: > I have a Matrox G450 with dual head option. I use the dual head, and want to > display pseudo color (8 bit) on both. > > However, the first screen works nicely in pseudo color, but the second > screen doesn't come up. When I change this to eg. 16 bit color the dual head > configuration works fine. > > Does anyone has a clue what the problem is? Because if it can display 16 bit > color on both screens, I would think it would be definitely possible to > display 8 bit color on both screens!
I believe it is a hardware limitation. You would be wrong to think that anything that can do 16 bits can do 8 bits. In 8 bit mode, each value is looked up in a table (the palette or color lookup table) before being converted into voltages. In 16 bit mode the 16 bits are split into 5+6+5bit, and those values are converted to voltages; there is no lookup table. The G450 doesn't have a table for the second head, so it can't do 8bit on that head :-(. -- Dr. Andrew C. Aitchison Computer Officer, DPMMS, Cambridge [EMAIL PROTECTED] http://www.dpmms.cam.ac.uk/~werdna _______________________________________________ Xpert mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/xpert
