Hello: I have followed many advice in the list of mail and profit not to install an interruption for the parallel port In / proc/interrupts it does not appear IRQ 7 That it can be happening? Another consultation that I have is: In RTL, the aperiodic and sporadic tasks what priority has? My system is a 486DX-2 under Linux S.U.S.E. 2.0.33. Thanks --- [rtl] --- To unsubscribe: echo "unsubscribe rtl" | mail [EMAIL PROTECTED] OR echo "unsubscribe rtl <Your_email>" | mail [EMAIL PROTECTED] ---- For more information on Real-Time Linux see: http://www.rtlinux.org/~rtlinux/