P2BXA flash BIOS ver:1.06B 
for the original BIOS VER:1.0x upgrade only 

P2bxa161.BIN P2BXA flash BIOS ver:1.61 
for the original BIOS VER:1.xx upgrade only 

P2bxa21.BIN P2BXA flash BIOS ver:21 
for the original BIOS VER:2.xx upgrade only