SUPER MICRO Computer AS1020S-8 PCI-X Slot Frequency Select, Onboard Speaker Enable/ Disable

Chapter 5: Advanced Serverboard Setup

PCI-X Slot Frequency Select

Jumpers JPXAO and JPXBO are used to set the speed of PCI-X slots #7 and #6, respectively. The recom- mended (default) setting is open for Auto. See the table on the right for jumper settings.

PCI-X Slot

Frequency Select

Jumper Settings

(JPXAO/JPXBO)

Jumper Setting	Defi nition
Pins 1-2	66	MHz PCI-X
Pins 2-3		MHz PCI
	66
Open	Auto

Onboard Speaker Enable/ Disable

The JD1 header allows you to use either an external speaker or the internal (onboard) speaker. To use the internal (onboard) speaker, close pins 6 and 7 with a jumper. To use an external speaker, connect the speaker wires to pins 4 through 7 of JD1. See the table on the right for settings and the table associated with the Power LED/Speaker connection (previous section) for pin defi nitions.

Onboard Speaker Enable/Disable

Pin Definitions (JD1)

Pins	Defi nition
6-7		Jump for onboard speaker
4-7		Attach external speaker wires

Watch Dog

JWD1 controls the Watch Dog function. Watch Dog is a system monitor that can reboot the system when a software application hangs. Pins 1-2 will cause WD to reset the system if an applica- tion has frozen. Pins 2-3 will generate

anon-maskable interrupt signal for the application that is frozen. See the table on the right for jumper settings. Watch Dog must also be enabled in BIOS.

Watch Dog

Jumper Settings (JWD1)

Jumper Setting	Defi nition
Pins 1-2	Reset
Pins 2-3	NMI
Open	Disabled

Note: When enabled, the user needs to write their own application software in or- der to disable the Watch Dog Timer.

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