Hi, In the following code, the nop instruction prefixed by rep will execute several times. How many times the instruction executes is controlled by ecx register. But, there is no explicit setting of ecx register. What's the meaning of this instruction? -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ