User manual AOPEN AX53-3

[. . . ] Chapter 3 AMI BIOS Utility This chapter tells how to configure the system by setting the BIOS parameters. 3. 1 Entering the AMI BIOS Setup To enter the AMI BIOS Setup, press c. The AMI BIOS Setup Main Menu appears as shown below. The AMI BIOS is in Windows form. You can use either the keyboard or a mouse to move between the items. To select among the Setup menu groups, use v to highlight the selected group or simply click on the icon of the selected Setup menu. 3-1 AMI BIOS Utility To select among the options, you can either use the arrow keys to move the highlight bar or simply click on the icon of the desired option. [. . . ] The Chipset Features Setup screen appears as follows. To scroll down the rest of the parameters, press }. Use w or y to highlight the desired parameter. 3-12 AMI BIOS Utility 430HX Global Features This option lets you enable or disable the 430HX chip features. To optimize system performance, set this parameter to Enabled. Select Disabled to disregard the option. Memory Hole This option lets you reserve system memory area for ISA cards. The settings are 512~640K, 15~16M, and Disabled. 8-bit I/O Recovery Time (Sysclk) This parameter allows you to set the response time of the 8-bit I/O devices connected to your system. The settings range from 1-7 SYSCLK and Disabled. 16-bit I/O Recovery Time (Sysclk) This parameter allows you to set the response time of the 16-bit I/O devices connected to your system. The settings range from 1-4 SYSCLK and Disabled. DRAM Timing The selections for this parameter are 60 ns, 70 ns, and Manual. If you select either 60 ns or 70 ns, the DRAM Timing subparameters become non-configurable since BIOS automatically sets the values. Select Manual if you want to specify your own parameter settings. DRAM REFRESH RATE This option lets you specify the frequency at which the chipset refreshes the DRAM to avoid data lost. The selections are 50 MHz, 60 MHz, and 66 MHz. ISA CLOCK DIVISOR This option specifies the ISA clock frequency. The selections are PCICLK/4 and PCICLK/3. 3-13 AMI BIOS Utility TURBO READ LEAD OFF When enabled, BIOS skips the first input register in the DRAM when reading data and therefore, speeds up the data read timings. Disable the option to bypass the feature. DRAM READ BURST TIMING This parameter sets the timing for burst mode reads from DRAM. Everytime the CPU reads the second-level cache miss, it reads four continuous memory cycles on four continuous addresses from the DRAM. The available parameter settings are X-4-4-4, X-3-3-3, and X-22-2. Faster DRAMs require shorter wait states. The value of X depends on the DRAM Lead-off Timing parameter setting. The default is X-4-4-4. DRAM WRITE BURST TIMING This parameter sets the timing for burst mode writes to DRAM. DRAM burst write requests are generated by the CPU in four continuous addresses. The available parameter settings are X-4-4-4, X-3-3-3, and X-22-2. Faster DRAMs require shorter wait states. [. . . ] If you set a Supervisor and a User password, you can enter either of the two entries when prompted for a password before system boot or entering Setup. 3-25 AMI BIOS Utility 3. 3. 3 Anti-virus Select Anti-Virus from the Security window to display the following option box. The virus protection options allow you to enable or disable the virus protection feature. 3. 4 Utility Setup The Utility window lets you change WinBIOS Setup colors and language setting. 3-26 AMI BIOS Utility 3. 4. 1 Color Set Select Color Set from the Utility window to display the following screen. Use the arrow keys or simply click an option to select your desired background color for WinBIOS. 3. 4. 2 Language Select Language from the Utility window to display the following screen. The system language currently supported is only English. Therefore, this option is non-configurable and is for display only. 3-27 AMI BIOS Utility 3. 5 Default Setup The Default window allows you to select a group of settings for all WinBIOS Setup options. 3. 5. 1 Original When you select Original, a dialog box prompts you to restore the old values. Select No to keep your current settings or Yes to restore the original values. 3-28 AMI BIOS Utility 3. 5. 2 Optimal When you select Optimal, a dialog box prompts you to load the optimal values. Select No to keep your current settings or Yes to load the optimal values. [. . . ]