radeonfb kernel parameters

["Ken Joseph" <o123@netian.com>]

Hi
I use Debian unstable. I just compiled kernel 2.6.7
with ATI Radeon framebuffer support inside.
I tried to set the initial video mode to
800x600 16bit 85MHz
but the video keeps coming at 600x480 8bit mode.
I use GRUB bootloader and tried the following configuration.

kernel (hd1,8)/boot/vmlinuz-2.6.7 root=hdc9 video=radeon:mode:800x600-16@85
initrd (hd1,8)/boot/boot-2.6.7.gz

Can somebody tell me how to set the correct video= parameter
for Radeon Framebuffer?
I can't find docs about this matter.

Thanks.