LAPIC - significado y definición. Qué es LAPIC
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Qué (quién) es LAPIC - definición

FAMILY OF COMPUTER INTERRUPT CONTROLLERS
Intel APIC Architecture; Local APIC; IO-APIC; IOAPIC; 82489DX; LAPIC; X2APIC; Advanced PIC; Local Advanced Programmable Interrupt Controller; XAPIC; Intel APIC architecture; I/O APIC

LAPIC         
Local Advanced Programmable Interrupt Controller (Reference: PIC)
Advanced Programmable Interrupt Controller         
In computing, Intel's Advanced Programmable Interrupt Controller (APIC) is a family of interrupt controllers. As its name suggests, the APIC is more advanced than Intel's 8259 Programmable Interrupt Controller (PIC), particularly enabling the construction of multiprocessor systems.
Advanced Programmable Interrupt Controller         
<integrated circuit> (APIC) A {Programmable Interrupt Controller} (PIC) that can handle interrupts from and for multiple CPUs, and, usually, has more available interrupt lines that a typical PIC. (2003-03-18)

Wikipedia

Advanced Programmable Interrupt Controller

In computing, Intel's Advanced Programmable Interrupt Controller (APIC) is a family of interrupt controllers. As its name suggests, the APIC is more advanced than Intel's 8259 Programmable Interrupt Controller (PIC), particularly enabling the construction of multiprocessor systems. It is one of several architectural designs intended to solve interrupt routing efficiency issues in multiprocessor computer systems.

The APIC is a split architecture design, with a local component (LAPIC) usually integrated into the processor itself, and an optional I/O APIC on a system bus. The first APIC was the 82489DX – it was a discrete chip that functioned both as local and I/O APIC. The 82489DX enabled construction of symmetric multiprocessor (SMP) systems with the Intel 486 and early Pentium processors; for example, the reference two-way 486 SMP system used three 82489DX chips, two as local APICs and one as I/O APIC. Starting with the P54C processor, the local APIC functionality was integrated into the Intel processors' silicon. The first dedicated I/O APIC was the Intel 82093AA, which was intended for PIIX3-based systems.