Check the man pages for startx but IIRC:

         startx -- -bpp 16
or
         startx -- -bpp 32



At 05:19 AM 4/3/2002 +0800, zuan . wrote:
>hello
>
>mybe this is a stupid question but i'm a newbies so dont hate me coz i'm a
>lame :p. how to set my xfree to use 16bit/32 bit ?? right now it only 
>using 8bpp(256 color) ?
>
>i'm using XFree86 Version 3.3.6a
>my card is SIS 630
>
>
>
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