Advanced Programmable Interrupt Controller (APIC) refers to a computer hardware device commonly found on modern computer systems that is responsible for managing interrupt requests and facilitating efficient handling of multiple concurrent interrupt requests. It is an advanced and enhanced version of the Programmable Interrupt Controller (PIC).
The APIC is designed to improve interrupt handling capabilities, particularly in multiprocessor systems. It provides a more flexible and powerful interrupt system by distributing interrupt handling tasks across multiple processors and allowing for efficient interrupt request management.
The APIC has several key features that distinguish it from the older PIC, including enhanced interrupt handling modes, advanced interrupt prioritization, and capabilities for interrupt remapping and routing. It facilitates smooth communication and coordination between the processor cores, system devices, and the operating system.
One significant improvement of the APIC is its ability to enable interrupt requests to be sent directly to specific processors, which ensures that the interrupt is processed by the most appropriate processor, reducing latency and improving system performance.
Additionally, the APIC's interrupt remapping and routing features allow for centralized management and control of interrupt requests, improving system reliability and flexibility.
Overall, the Advanced Programmable Interrupt Controller is a critical component of modern computer systems, enabling efficient and effective handling of interrupt requests, improved multitasking capabilities, and enhanced system performance.
