User manual AOPEN AX65-2-HW

[. . . ] 5. Upgrading the Microprocessor Turn off the system power and remove the housing cover. Refer to section 2. 4 for instructions on how to install a CPU. To upgrade a CPU: 2-6 Hardware Installation 2. 6 Configuring the System Memory The system memory is expandable to 512 MB by adding single in-line memory modules (SIMMs). The four 72-pin SIMM sockets accommodate DRAMs, 4-, 16- and 64-MB single-density SIMMs, and 8- and 32-MB double-density SIMMs. [. . . ] See the figure in section 2. 2 for the location of the jumpers on the system board. The following sections tell how to configure the system board to meet the desired performance: 2. 7. 1 Setting the Voltage Regulator The jumper JP1 enables you to set the voltage of the onboard voltage regulator. The supported voltage range is from 2. 1V to 3. 5V. * See the following figure for the correct settings. Voltage JP1 Voltage JP1 Auto * 3. 5V 3. 4V 3. 3V 3. 2V 3. 1V 3. 0V 2. 9V 2. 8V 2. 7V 2. 6V 2. 5V 2. 4V 2. 3V 2. 2V 2. 1V * The system can automatically detect the CPU volltage through the VID pins; therefore, by default, JP1 is set to OPEN. You do not need to set the voltage regulator setting. 2-11 Hardware Installation 2. 7. 2 Disabling the Onboard Super I/O Control ler The board is preset by the manufacturer with the onboard I/O controller enabled. In case you wish to use an external I/O controller, you need to disable the onboard I/O before the external I/O card functions. To disable, you need to reset jumper JP6 to 1-2. Disabled Enabled JP6 2. 7. 3 Setting the Keyboard Clock By default, the keyboard clock is set according to the ISA clock. If you want to increase the clock setting to 12 MHz by simply resetting jumper JP7 to 1-2. ISA Clock JP7 12 MHz 2. 7. 4 Disabling the PS/2 Mouse Function The PS/2 mouse function is normally enabled and occupies IRQ12. To Enabled JP8 reassign IRQ12 to another function, you need to disable the PS/2 mouse function by setting jumper JP8 2-3 and changing the BIOS setting (see Chapter 3). Disabled 2-12 Hardware Installation 2. 7. 5 Enabling the Intel Flash ROM Boot Block Programming The Intel Flash ROM has two areas that can be programmed separately: BIOS area. The jumpers JP11 and JP12 allow you to program the Flash ROM boot block. By default, the boot block program function is enabled and both JP11 and JP12 are set to 1-2. Reserved JP11 JP12 the Enabled (default) 8KB boot block and the 120KB main The jumper setting shown above applies only for Intel Flash ROM. Doing so modifies the main BIOS area but not the boot block, causing the BIOS to become inconsistent. This may result in serious system damage. 2. 7. 6 Selecting the Power Switch Type The jumper JP14 allows you to set the power switch type that you want to support, i. e. , either the toggle type or the momentary type. However, before you set this jumper, make sure that you know your power switch type. Momentary type switch Toggle type switch JP14 2-13 Hardware Installation To differentiate a toggle type from a momentary type, check the On and Off switch position. In a toggle type switch, a pressed switch indicates On position while a normal switch position indicates Off. In a momentary type, the switch position does not change for both modes. Close all pins (1-4) to support a momentary type switch. 2. 7. 7 Clearing the CMOS You need to clear the CMOS if you forget your system password. To clear the CMOS, do the following steps: Before you proceed, check your onboard CMOS chip. Check your manual for the correct jumper settings and location of the jumpers. Clear CMOS Normal (default) 3. [. . . ] CN1 2. 9. 3 USB Devices You need a USB bracket to enable your system to support USB device(s). To attach a USB bracket, simply insert the bracket connector to the onboard USB connector. The IrDA module enables the system to transfer data and communicate with portable devices such as laptops, PDA, and printers, without the need to connect cables. [. . . ]