Hi all, I have attempted a ugly hack seeing the phrack article which describes about IDT hacking, i try to execute a small assembly language ISR, by hooking the timer interrupt but my PC will either hang or restarts, the small routine definatly takes less time means in few microseconds then why computer is hanging as HZ is 100 means 10 millisecond, if the average CPU usage is very less say 35 percent in PC,so no need to do frequent timer0 interrupt,or ,I'm confused but i can used this 0 to 10 millisecond in between time to controlling real time application which takes time in microseconds. so that i'm utilizing my usage of CPU more effectively plz reply Thanks to all Prasanna V. Wakhare __________________________________ Do you Yahoo!? Yahoo! Mail - More reliable, more storage, less spam http://mail.yahoo.com -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/