... This chapter looks at how interrupts are handled by the Linux kernel. ... One of these pins might be connected to an interval timer and receive an interrupt every 1000th of a second, others may be connected to the other devices in the system, such as the SCSI controller. ... If, for example, the floppy controller interrupts on pin 6 1 of the interrupt controller then it must recognize the interrupt as from the floppy and route it to the floppy device driver's interrupt handling code. ...