$temp_addr = "A5A5A5A5A5A5A5A5";
$temp_data = "82100000";
my $bc_addr = `echo \"ibase=16;obase=16;($temp_addr/8)\" | bc`;
my $bc_data = `echo \"ibase=16;obase=16;($temp_data*200)\" | bc`;
die "$bc_data, $bc_addr";