An IRQ is a signal that is sent by a peripheral device (such as a network card, graphics adapter, mouse, modem, or serial port) to the CPU to request processing time.

• IRQ是被一个周边装置(像是一个网络卡,图形转接器、鼠标、调制解调器或序列端口)送到处理器请求的一个讯号处理时间。