These is patch of the original Be driver for ATI Rage 128.
Now it's patched to work with ATI Rage 128 Pro GL (I have a ATI Fury Pro 32 VIVO). It works well on my system.
Use at your own risk.
To install copy the two files in the indicated folder than reboot.

rage128 /boot/beos/system/add-ons/kernel/drivers/bin/
rage128.accelerant /boot/beos/system/accelerators/