User manual AOPEN AX53-2

[. . . ] Make sure that pin 1 of the CPU aligns with hole 1 of the socket. The notched corner on the CPU indicates the location of pin 1. Pin 1 indicator 3. Pull down the socket lever to lock the CPU into the socket. 2-4 Hardware Installation 4. Attach the heatsink and fan to the CPU. 5. Plug the fan cable to the two-pin fan connector onboard. [. . . ] The onboard jumpers are normally set to its default setting. 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 Enabling the ATX Power Supply The AX53 board comes with two power connectors to support both PS/2 and ATX power supplies. To use an ATX power supply, set the jumper JP1 to 2-3. To switch to PS/2 power supply, reset JP1 to 1-2. ATX Power Supply Power OFF JP1 Power ON (default) 2. 7. 2 Selecting the Cache Size The AX53 supports 256-KB and 512KB pipelined-burst cache. If your board comes with a 256-KB onboard cache, JP7 is preset by the manufacturer to 1-2. To upgrade your cache to 512 KB via cache upgrade socket, change the setting of JP7 to 2-3. If your board comes with a 256-KB pipelined-burst cache, JP7 presetting is 2-3. JP7 256-KB 512-KB 2-12 Hardware Installation 2. 7. 3 Selecting the Cache Module Type The onboard cache upgrade socket allows you to upgrade your cache from 256 KB to 512 KB. This cache socket accepts 256-KB cache module with or without Tag RAM. If you install a cache module without Tag, set JP16 to 1-2. If you install a module without Tag, set JP16 to 2-3. JP16 Module without Tag Module with Tag (default) 2. 7. 4 Disabling the Onboard Super I/O Controller 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 JP12 to 2-3. JP12 Enabled (default) Disabled 2-13 Hardware Installation 2. 7. 5 Disabling the PS/2 Mouse Function The PS/2 mouse function is normally enabled and occupies IRQ12. To reassign IRQ12 to another function, you need to disable the PS/2 mouse function by opening jumper JP14 and changing the BIOS setup. For detailed information on BIOS, see Chapter 3. JP14 Enabled (default) Disabled 2. 7. 6 Setting the Keyboard Clock The jumper JP15 enables you to set the keyboard clock. The clock selections are ISA clock and 12 MHz. Set JP15 to 1-2 to select the ISA clock. Reset it to 3-4 to set the keyboard clock to 12 MHz. JP15 ISA clock (default) 12 MHz 2-14 Hardware Installation 2. 7. 7 Clearing the CMOS You need to clear the CMOS if you forget your system password. To do this, shut off the system power and short pins 2-3 of JP9 for a few seconds. Reset the jumper to normal setting by shorting pins 1-2. Enter Setup to specify a new password. JP9 Normal (default) Clear CMOS 2. 8 Upgrading the Second-level Cache Observe ESD precautions when installing components. The system board comes with either 256KB pipelined-burst second-level cache and a cache upgrade socket, or 512-KB pipelined burst cache. The cache upgrade socket accepts a 256-KB pipelined-burst cache module; therefore, allowing you to to upgrade the secondlevel cache to 512 KB. [. . . ] If you have other IDE device to install in your system, connect it to the slave port. HDD 1 Master port HDD 2 Slave port Secondary IDE Connector The secondary IDE connector is marked CN9 on the board. This connector also supports two IDE devices. To install an IDE CD-ROM drive into your system, insert master port of the secondary IDE cable into the CD-ROM drive connector. [. . . ]