摘要
PCI总线有四条中断线,所有PCI设备共同使用这四条线向系统申请中断,中断请求经可编程中断路由器路由到可编程中断控制器的某条中断请求输入脚IRQi,再由中断控制器代理向CPU申请中断,CPU响应中断后,从中断入口表中取得入口或顺次入口链查得入口。
PCI bus has four interrupt lines.All PCIdevices use these interrupt lines to request an interrupt together.Interrupts are routed to IRQi pins of programmable interrupt controller via programmable interrupt router and propagated to CPU by programmable interrupt controller.After CPU respond to interrupt,it obtain entry address from interrupt ertry address table or entry address link to go to perform interrupt serve program.
出处
《青海师范大学学报（自然科学版）》
2005年第2期51-53,共3页
Journal of Qinghai Normal University(Natural Science Edition)
关键词
PCI中断
硬件组成
路由
PCL interrupt
hardware composing
route
