That should do it. AFUDOS 2.x Recommended Usage Info from yen. Afudos /ixxxx.rom xxxx.rom is your modified bios. (Program main BIOS image) Afudos /ixxxx.rom /pbnc /n xxxx.rom is your modified bios. (Programs main BIOS image & bootblock image and resets CMOS and NVRAM to defaults)