US Patent 7363394 ID configuration method for advanced programmable interrupt controller

An advanced programmable interrupt controller (APIC) identification (ID) configuration method is applied to a multiprocessor computer system. The method assigns a postponed ID to each CPU's APIC IDs respectively during the initialization. Plural reserved IDs are assigned to the I/O APICs. A multiprocessor configuration table in a basic input output system (BIOS) will be updated with renewed ID configuration, to avoid an ID conflict when processing the interrupt request from the peripheral devices and raise the stability of the multiprocessor computer system.