I have a P3TDDE motherboard with a 200GB hard drive on it. Since the old BIOS cannot see more than 137GB, I downloaded the new BIOS that supports 48-bit addressing. Unfortunately, flashing the BIOS does not help.
When you flash the BIOS, you should have all the parameters at the back of the command awdflash filename.bin /py/wb/cd/sn/cc/r in order to flash the boot block of the BIOS.