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CHAPTER 3 ............................................................................................................... 33 HARDWARE DESCRIPTION ..................................................................................... 33 3.1 Microprocessors ............................................................................. 33 3.2 BIOS............................................................................................... 33 3.3 System Memory.............................................................................. 33 3.4 I/O Port Address Map..................................................................... 34 3.5 Interrupt Controller ......................................................................... 36 CHAPTER 4 ............................................................................................................... 37 AMI BIOS SETUP UTILITY ........................................................................................ 37 4.1 Starting ........................................................................................... 37 4.2 Navigation Keys ............................................................................. 37 4.3 Main Menu...................................................................................... 39 4.4 Advanced Menu ............................................................................. 40 4.5 Boot Menu ..................................................................................... 52 4.6 Security Menu ................................................................................ 55 4.7 Chipset Menu ................................................................................. 56 4.8 Exit Menu ....................................................................................... 61 APPENDIX A .............................................................................................................. 63 WATCHDOG TIMER .................................................................................................. 63 What is Watchdog Timer...................................................................................... 63 How to Use the Watchdog Timer ......................................................................... 63 APPENDIX B .............................................................................................................. 66 DIGITAL I/O................................................................................................................ 66 Digital I/O Software Programming ........................................................................ 67 V