bios修改设计基础性教程.ppt

Confidential Agenda Hardware Block 1 Hardware Block 2 Hardware Block 3 Chipset North Bridge1 North Bridge2 FSB(Front Side Bus) South Bridge 1 South Bridge 2 同一NB/SB架構，不同命名方式 Sis Pentium 4chipset Super IO EC MLB Interface MLB Slot1 MLB Slot2 Storage Interface I/O Device Interface(Parallel) I/O Device Interface(Serial) I/O Device Interface(PS/2) I/O Device Interface(USB)1 I/O Device Interface(USB)2 I/O Device Interface(1394) BIOS BIOS功能 1.自检及初始化： 2.程序服务：BIOS直接与计算机的I/O（Input/Output，即输入/输出）设备打交道，通过特定的数据端口发出命令，传送或接收各种外部设备的数据，实现软件程序对硬件的直接操作。 3.设定中断：开机时，BIOS会告诉CPU各硬件设备的中断号，当用户发出使用某个设备的指令后，CPU就根据中断号使用相应的硬件完成工作，再根据中断号跳回原来的工作。 BIOS載體類型 BIOS封裝形式 CMOS芯片 PCI Device PCI-E PCI PCI PCI nonbridge PCI-PCI Bridge PCI PIC-Express of Server Command Register Status Register Header Type Base Address Get Address Space Size PCI Access Configure Space PCI-Express PCI-Express 服务器/工作站 系统 Evolutionary Form Factor Enhanced ConfigurationSpace Layout Configuration Space Configuration Space Memory-Mapped Access Model (MMConfig) Option ROM Option ROM 用途 Option ROM 用途：用于引导设备启动 Why Option Rom must Shadow: PCI Specification Required Directly Rom Access is too slow,and poor perfance. Once initialization potion of ROM has been executed, it can be discarded and code image in main memory can be shorted,thus allowing more efficient use of main memory. Option ROM Option ROM Option ROM Option ROM Option ROM Option ROM Option ROM SMBus What is SMBus? EEPROM IIC Principle IIC Principle IIC Principle IIC Principle SMBus IIC Host, Master and Slave SMBus IIC Principle SMBus I/O Register Address Map Flow DIMM SPD ECC Introduce1 Introduce2 SPD Slave Addressing SPD Slave Address Sample SPD Data Description Simple Architecture One master and one or more slave Each slave has itself address Master contact with slave by address 膳陛堕仿酬康润盯恋佯认漆埠警艾厅锐塔砍吟淹榴絮硒固扮仓睡新囚溃禁BIOS修改设计的基础性教程BIOS修改设计的基础性教程 Slave address was determined by vendor and designer. Each slave has 7-bit address line, higher 4-bit was fixed by vendor and