Redump your BIOS.
Warez Policy
NGEmu takes a "no tolerance" stance against the trading/sharing/discussion of illegal software, also known as warez. Links to or requests for illegally-obtained commercial material, such as ROMs, ISOs, or BIOS images will not be tolerated. If you post in a forum for support and you are found to be in possession of illegal content, your thread will be immediately closed.