this program is "MBR bootable check,fro GRUB1"
INFO:root check ok.

INFO:/dev/sda   0xaa55
INFO:/dev/sda1  0x80
INFO:JUMP       0x48eb
INFO:GRUB       0x0203
#Stage2
INFO:load       0x2000
INFO:Secter     0x00000000
INFO:Segment    0x0202