The 302 BETA BIOS has more Booster Level

Enable: 1,2,3
no try level = 0, too slow

266Strap, Level 1 = Performance Level 6
266Strap, Level 2 = Performance Level 5
266Strap, Level 3 = Performance Level 4 <== I think, result in no boot

333Strap, Level 1 = Performance Level 9
333Strap, Level 2 = Performance Level 8
333Strap, Level 3 = Performance Level 7