You'll need to recompile the kernel.
In the "Console Drivers" section,
make sure to have VGA text console and Video mode selection support.
Then go down to frame buffer support,
check Support for frame buffer devices
and then check vesa vga graphics console
and vga 16 color graphics console
That should be all that's needed.
The radeon driver never worked right with my card, so i just use vesa on it, no biggie.