Installation Instructions
K8N4/K8N4U
16
BIOS-Protection Jumper (BIOS_WP)
If the jumper BIOS_WP is set as closed, the system BIOS is protected from being at-
tacked by serious virus such as CIH virus, you will be unable to flash the BIOS to the
mainboard in this status.
The DMI (Desktop Management Interface) system information such as the CPU type/speed,
memory size, and expansion cards will be detected by the onboard BIOS and stored in the
flash ROM. Whenever the system hardware configuration is changed, DMI information will
be updated automatically. However, setting jumper BIOS_WP as closed makes flashing
BIOS and updating DMI information impossible. Therefore, set BIOS_WP as open when
changing the system hardware configuration, or the error message “Unknown Flash
Type” will be displayed on the screen, and DMI information may not be updated.
BIOS_WP
Flash Write Disabled
Flash Write Enabled
Enable Front Panel USB Device Wake-up Function (JFUSB)(optional)
The mainboard provides the advanced USB device wake-up function. The system can be
waked up from its power saving status including ACPI S3 by activating USB device.
Before using this function, set JFUSB with pin1 & pin2 closed. Otherwise, set JFUSB with
pin2 & pin3 closed for disabling. Furthermore, the item “USB Resume from S3”in Power
Management Setup should also be set correspondingly to enable or disable this function.
JFUSB
Front USB Wake up Disable
Front USB Wake up Enable
1
2
3
1
2
3
