User manual EPOX EP-3XCA2

[. . . ] Before connecting the power supply, please make sure it is not connected to the power source. ATX Power Supply Connector (PW1) The power cord leading from the system's power supply to the external power source must be the very last part connected when assembling a system. To support this function, a switching power supply with a minimum of 750mA 5VSB is required. The ATX power supply provides a single 20-pin connector interface which incorporates standard +/ -5V, +/-12V, optional 3. 3V and Soft-power signals. The Soft-power signal, a 5V trickle supply is continuously supplied when AC power is available. When the system is in the Soft-Off mode, this trickle supply maintains the system in it's minimum power state. Power-On By Modem While in Soft-off state, if an external modem ring-up signal occurs, the system wakes up and can be remotely accessed. [. . . ] To power down your computer, click the START button on the Windows 95/98 task bar. The message "It is now safe to turn off your computer" will not be shown when using this function. 7 Chapter 2 C. Green Switch/Green LED Connector Some ATX cases provide a Green switch which is used to put the system in Suspend mode. In Suspend mode, the power supply to the system is reduced to a trickle, the CPU clock is stopped, and the CPU core is in it's minimum power state. The system resumes in different ways as defined by Power Management Setup screen in BIOS. System Reset Switch Connector This connector should be connected to the reset switch on the front panel of the system case. The reset switch allows you to restart the system without turning the power off. Pin 1 2 Definition System GND E. Speaker Connector Pin 1 2 3 4 Definition Speaker Signal No Connection No Connection +5V DC F. IDE Activity LED Connector The IDE activity LED lights up whenever the system reads/writes to the IDE devices. Turbo LED Connector This motherboard does not have a Turbo/De-turbo speed modes. So the turbo LED will always light. Blinking LED in Suspend Mode While in Suspend mode, the LED light on the front panel of your computer will flash. Suspend mode is entered by pressing the Override Power Button, pushing the Green button on your ATX case, or enabling the Power Management and Suspend Mode options in BIOS's Power Management menu. 8 Hardware Setup Optional Onboard Audio (JP1) 1 1 Enable Disable This function allows you to enable and disable the on board audio. You must set the jumper's cap to pins 1-2 to enable or set pins 2-3 to disable this function. Audio Line_out or Speaker_out (JP3/JP4) JP3 1 JP4 Line_out JP3 JP4 1 Speaker_out (default) This jumper allows you to select between audio line-out or speaker out function. Set both JP3 and JP4 pins to 1-2 for line-out function or set both JP3 and JP4 pins to 2-3 for speaker out function. Optional Boot BIOS Select (JP5) 1 1 Boot BIOS select (default) BIOS 1 (Power on only)/ BIOS 2 (Power on + Reset button) This feature allows you to select a BIOS to boot up your system. Set the pin to 1-2 to enable Boot BIOS select in the BIOS Features Setup and then select either BIOS 1 or BIOS 2 for startup (see section 2-4). The feature also allows you to manually shift to another BIOS once the BIOS fail to boot. Set pin to 2-3 to boot from BIOS 1 and then press the power on button to boot up or press reset and power on button hold for 2-3 second and then release to boot from BIOS 2. 9 Chapter 2 Clear CMOS Data (JP6) 1 1 Normal (default) Clear CMOS data To clear the contents of the CMOS, please follow the steps below. Set the jumper cap at location 2~3 for 5 seconds, then set it back to the default position. Set the system configuration in the Standard CMOS Setup menu. Optional Primary Audio CODEC Select (JP7) 1 1 Onboard CODEC (Default) AMR (Soft-Audio/Modem riser) Short pin 1-2 to enable onboard AC`97 CODEC. Short pin 2-3 to enable AMR (Soft Audio/Modem riser). CPU Bus Frequency (JP12/JP13) JP12 Auto (default) 1 ~ 2 66MHz 100MHz 133MHz 2~3 2~3 Open JP13 1~2 2~3 Open Open This jumper allows the CPU bus frequency to be determined either by the CPU or the user. Set both jumper cups to pin 1-2 (default) if you are not sure what frequency your CPU support. 10 Hardware Setup Optional IDE RAID Controller (JPX1) 1 Enable (Default) 1 Disable The motherboard (optional) support IDE RAID 0/ 1 feature. [. . . ] USB is a dynamically reconfigurable serial bus with an elementary data rate of 12Mbps. Based on off the shelf, low cost micro-controller technology, its modular layered software protocol supports sophisticated devices and application programs. Due to loading anomalies, using DIMM with an 'n x 4' DRAM base on this motherboard is not recommended. For example, a DIMM that uses sixteen 16Mb x 4 devices should not be used. SPD (Serial Presence Detect) This is an EPROM that contains speed and design information about the memory module. [. . . ]