SCI

SCI (System Control Interrupt) :系統控制中斷

A system interrupt used by hardware to notify the OS of ACPI events. SCI is one of IRQ source .

SCI 機制完全由ACPI OS Kernel 所掌控與保護, User App/Driver 無法禁止SCI 發生.DOS下能觸發SMI但不能觸發SCI,在OS則是兩者都能觸發.簡單說SCI也是IRQ的一種.