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7.2.1 VGA I/O Addresses ...............................................................................1287.2.2 ISA Addresses ......................................................................................1287.2.3 CFC/CF8 Addresses ...............................................................................1287.2.4 PCI Express Device I/O Addresses...........................................................1287.3 Configuration/CSR Space .................................................................................. 1287.3.1 PCI Express Configuration Space............................................................. 1297.3.2 Processor CSR Space............................................................................. 1297.4 IOH Address Map Notes .................................................................................... 1297.4.1 Memory Recovery .................................................................................1297.4.2 Non-Coherent Address Space ................................................................. 1297.5 IOH Address Decoding...................................................................................... 1307.5.1 Outbound Address Decoding................................................................... 1307.5.1.1 General Overview....................................................................1307.5.1.2 FWH Decoding ........................................................................1317.5.1.3 I/OxAPIC Decoding..................................................................1317.5.1.4 Other Outbound Target Decoding .............................................. 1317.5.1.5 Summary of Outbound Target Decoder Entries ............................1327.5.1.6 Summary of Outbound Memory/IO decoding ............................... 1327.5.2 Inbound Address Decoding.....................................................................1337.5.2.1 Overview ............................................................................... 1337.5.2.2 Summary of Inbound Address Decoding .....................................1347.6 <strong>Intel</strong> ® VT-d Address Map Implications ................................................................ 1378 Interrupts ..............................................................................................................1398.1 Overview ........................................................................................................1398.2 Legacy PCI Interrupt Handling ........................................................................... 1398.2.1 Summary of PCI Express INTx Message Routing ....................................... 1408.2.2 Integrated I/OxAPIC ............................................................................. 1418.2.2.1 Integrated I/OxAPIC MSI Interrupt Ordering ............................... 1438.2.2.2 Integrated I/OxAPIC EOI Flow................................................... 1438.2.3 PCI Express INTx Message Ordering ........................................................ 1448.2.4 INTR_Ack/INTR_Ack_Reply Messages ......................................................1448.3 MSI ...............................................................................................................1448.3.1 Interrupt Remapping.............................................................................1468.3.2 MSI Forwarding: IA-32 Processor-based Platform ...................................... 1478.3.2.1 Legacy Logical Mode Interrupts .................................................1498.3.2.2 Legacy Logical Mode Interrupt Redirection Vector Number Redirection .......................................................1498.3.2.3 Legacy Logical Mode Interrupt Redirection Round-Robin Redirection .......................................................... 1508.3.2.4 Physical Mode Interrupts and Extended LogicalCluster Mode Interrupts ........................................................... 1508.3.2.5 IA-32 Interrupt Delivery Summary ............................................ 1518.3.3 External I/OxAPIC Support.....................................................................1528.4 Virtual Legacy Wires ........................................................................................ 1538.5 Platform Interrupts ..........................................................................................1538.5.1 GPE Events ..........................................................................................1538.5.2 PMI/SMI/NMI/MCA/INIT......................................................................... 1558.5.2.1 INIT# ....................................................................................1558.5.2.2 Global <strong>Intel</strong> SMI ......................................................................1568.5.3 CPEI ...................................................................................................1569 System Manageability ............................................................................................ 1579.1 Introduction ....................................................................................................1579.2 Error Status and Logging .................................................................................. 1579.3 Component Stepping Information ...................................................................... 1579.4 <strong>Intel</strong> ® Interconnect Built-In Self Test ................................................................. 1579.5 Hot-Plug Status Access ..................................................................................... 1579.6 Link Status Indication.......................................................................................1578 <strong>Intel</strong> ® 5520 Chipset and <strong>Intel</strong> ® 5500 Chipset Datasheet

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