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The Unabridged Pentium 4 IA32 Processor Genealogy by Bob Colwell, Tom Shanley

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Locally Generated Interrupts

Introduction

The Local APIC can receive an interrupt from any of the following local sources:

  • The processor's Local Interrupt pin 0 (LINT0).

  • The processor's Local Interrupt pin 1 (LINT1).

  • The programmable timer incorporated within the Local APIC.

  • The processor's Performance Counters.

  • The processor's internal thermal sensor.

  • The Local APIC's error detection logic.

The sections that follow provide a detailed description of each of the local interrupt sources.

The Local Vector Table

The Local APIC incorporates a register set that is used to set up the Local APIC to handle each of the local interrupts. This register set is a subset of the Local APIC's overall register set and is referred to as the Local Vector Table (LVT). ...

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