S2257 Thunder 2400
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1-N. Narrow SCSI Termination (J49)
To terminate the 50 pin Narrow SCSI Connector jumper J49 must be open.
Default is open.
1-O. SCSI Channel B (J50) Channel A (J51) force to SE Mode
Some SCSI devices cannot be detected under Ultra-2 SCSI standards and may
cease to function properly when used on either Channel A or Channel B. If this
should happen, you would need to force that particular channel to Single End
mode in order to allow the device to be detected. Please bear in mind that the
data transfer rate of Single end SCSI mode is 40 MB/Sec whilst Ultra-2 is at 80
MB/Sec.
1-P. 64bit PCI Bus Frequency (J55)
The two 64bit PCI slots located on the board are capable of functioning at both
33 MHz and 66 MHz. The default setting for jumper J55 is closed and the slot
runs at 33 MHz. To set the BUS speed to 66 Mhz, J55 must be opened.
1-Q Boot Block Write-Protect (JP3)
The Boot block contains information concerning how the system will POST.
JP3 is open by default which prevents writing to the Boot Block. If modifica-
tions need to be made, JP3 must be closed in order to disable write-protection.
1-R Enable/Disable LAN (J44)
This jumper allows you to enable the onboard LAN function. Default is
enabled (open).
Soft Power Connector
The Soft Power Connector is part of jumper block J12. The Thunder 2400 uses
the chipset for power management, including turning on and off the system. If
the Power Button Function option in the BIOS Power Management Menu is
set to On/Off (which is the default), pressing the power button once after the
BIOS has booted up will turn the system on and off. If the Power Button
Function option is set to Suspend, pressing the power button once will wake
the system or send it to Suspend mode. In this case, you cannot turn the
system off unless you shut down through the Windows operating system or
you hold the power button down for at least four seconds.
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