Local Advanced Programmable Interrupt Controller
From XOmB wiki
The Local Advanced Programmable Interrupt Controller (LAPIC) is a hardware controller designed by Intel responsible for dispatching interrupts that are received external to the core to that CPU's interrupt handler. It is typically used in conjunction with an IOAPIC. After it is dispatched, it will use the Interrupt Descriptor Table to determine the environment and code to be executed for that interrupt.
- pdf - Intel MultiProcessor Specification