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. 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. After making your selection, press e or double-click on the icon to open the selected menu option. [. . . ] The default setting is Disabled. The F000 and E000 addresses are exclusively shadowed for BIOS. 3-11 AMI BIOS Utility 3. 2. 3 Chipset Features Setup The Chipset Features Setup controls the board chipset settings. 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. Memory Hole This option lets you reserve system memory area for ISA cards. 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 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 value of X depends on the DRAM Lead-off Timing parameter setting. FAST RAS TO CAS DELAY (CLOCKS) This option specifies the wait state between the row address strobe (RAS) and column address strobe (CAS) signals. The available settings are 3 and 2. DRAM LEAD-OFF TIMING (DLT) This option specifies the lead-off time before data can be accessed. Some DRAMs may require a longer delay to access data. SPECULATIVE LEAD OFF Enable the parameter to speed up the data read action by presenting the DRAM controller read request before the controller chip decodes the data to the final memory target (i. e. , cache, DRAM or PCI). TURN AROUND INSERTION Enabling this option allows the CPU to insert one turn-around clock cycle to the MD signals after asserting the MWE signal before enabling the MD buffers. Set this to Disabled to select the back-to-back DRAM cycles for asserting MWE signal. 3-14 AMI BIOS Utility Peer Concurrency Enable this parameter if you want to activate more than one PCI device. Memory Error Check Mode This parameter allows you to set the DRAM error checking mode. Suspend Timeout (Minutes) This function lets you set when to put the system to suspend mode. Slow Clock Ratio When the system enters the standby mode, the CPU clock starts to slow down. [. . . ] You may also use the mouse and the characters on the screen to set up a password. Enter the password when a confirmation box appears. 3-24 AMI BIOS Utility 3. 3. 2 User Password To set a User password, select User from the Security window. The following screen appears: For instructions on how to enter a password, follow the procedures listed in section 3. 3. 1. 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. [. . . ]