APIC
APIC
The APIC or Advanced Programmable Interrupt Controller is a sophisticated hardware device that is designed to manage and control interrupt requests (IRQs) in a computer system. It is an integral part of modern computer architecture, particularly in multiprocessor systems, where it helps to improve system performance and efficiency.
Function
The primary function of the APIC is to manage and control interrupt requests (IRQs) from various hardware devices. It does this by assigning each IRQ to a specific processor in a multiprocessor system. This allows the system to handle multiple IRQs simultaneously, thereby improving system performance and efficiency.
Architecture
The APIC architecture consists of several components, including the Local APIC (LAPIC), the I/O APIC, and the Interrupt Controller Communications (ICC) bus. The LAPIC is integrated into each processor and is responsible for handling local interrupts. The I/O APIC handles interrupts from I/O devices, while the ICC bus facilitates communication between the various APIC components.
APIC vs PIC
The APIC is an advanced version of the Programmable Interrupt Controller (PIC), which was used in earlier computer systems. Unlike the PIC, the APIC supports multiprocessor systems and provides more interrupt lines, allowing for greater system scalability and performance.
See Also
External links
- Medical encyclopedia article on APIC
- Wikipedia's article - APIC
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