Updated: Thursday, December 5, 1996

Contents

• Jumper Locations and Definitions
• Microprocessor Configuration
• Memory Configuration

Jumper Locations and Definitions

Function		Jumper Block		Configuration
		
Setup Access		J12B1-A			Down = Access allowed (default)
						Up = Access denied

Flash mode		J12B1-B			Down = Normal (default)
						Up = Recover

CMOS Settings		J12B1-C			Down = Keep (default)
						Up = Clear

Password		J12B1-D			Down = Password enabled (default)
						Up = Password clear / function disabled

Processor Clock Speed	J12B1-E through H	See Microprocessor Configuration

DIMM Speed		J12B2-M			See Memory Configuration	

Setup Access (J12B1-A)
You can disable access to Setup by moving this jumper from the down position to the up position. Default access is the down position (access allowed).

Processor Clock Speed (J12B1-E, F, G and H)
The motherboard supports 180 MHz and 200 MHz Pentium Pro processors. The table below shows jumper settings for processor speed. These jumpers also affect the host bus, PCI, and ISA clock frequencies.

Processor Freq. (MHz)	Host Bus Freq. (MHz)	PCI Bus Freq. (MHz)	ISA Bus Freq. (MHz)	Settings
180	60	30	7.5	E - Down G - Down	F - Up H - Down
200	66	33	8.33	E - Down G - Down	F - Down H - Down

DIMM Speed (J12B1-M)
The motherboard supports two DIMM speeds: 50 ns and 60 ns. Installed DIMMs must be the same speed. If you install a 50 ns DIMM in one socket and a 60 ns DIMM in another, both modules will operate at the slower speed. The table below shows the jumper settings for memory speed.

Memory Speed	Jumper Block	Setting
50 ns	J12B2-M	Up (pins 1-2)
60 ns	J12B2-M	Down (pins 2-3)(default)

Caution: The jumper on pins 4-5 (block J12B2-M) is reserved. Do not change it.

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