Net Terms IRQ (Interrupt Request) Whenever you attach a new device to your computer, you'll usually need to specify an IRQ value for it. An IRQ (interrupt request) value is an assigned location where the computer can expect the new device to interrupt it when the device sends the computer signals about its operation. For example, when a printer has finished printing a document, it sends an interrupt signal to the computer. The signals momentarily interrupts the computer, so that it can decide what processing to do next. Since the computer might not understand multiple signals sent on the sam interrupt line, a unique value must be specified for each device and its path to the computer. Most devices provide explicit directions on how to assign IRQ values for it. If you're installing a new device and don't know what value to specify, you'll save a lot of time by calling the manufacturer's technical support phone number and asking for help.