Ok
Theres a couple of ways you could fix this.
1) Install a homebrew chip, and flash the tsop by cutting the wires off the homebrew
OR
2) If it was NOT a dual bios that you flashed, you should be able to ground a18 and a19, which should use the first 256k of your tsop, and should boot fine, and then flash the bios properly
Regards,
Smuggl0r