Updated: Friday, January 3, 1997

Contents

• Jumper Locations and Definitions
• Microprocessor Configuration

Jumper Locations and Definitions

Function		Jumper Block		Configuration
		
Password Clear		J6D1			27-29 Password Enabled (default)
						25-27 Password Clear/Disabled

CMOS Clear		J6D1			20-22 Keep (default)
(NVRAM and ESCD)				18-20 Clear

BIOS Setup Access	J6D1			28-30 Access Enabled (default)
						26-28 Access Denied (password protected)

Processor Frequency	J6D1			See CPU Configuration	

Host Bus Frequency	J6D1			See CPU Configuration
(Note: These jumpers also set PCI and ISA clock speeds.)	

BIOS Recovery		J6D1			4-6 Normal operation (default)
						2-4 Recover BIOS

Microprocessor Configuration (J6D1)
These allow the motherboard to be switched between different speeds of the Pentium Pro processor. These jumpers also affect the PCI and ISA clock speeds according to the following table.

Microprocessor Freq. (MHz)	Host Bus Freq. (MHz)	J6D1	Microprocessor Clock Multiplier	PCI Bus Freq. (MHz)	ISA Bus Freq. (MHz)
200	66	19-21, 12-14, 9-11	3	33	8.33
180	60	17-19, 12-14, 9-11	3	30	7.5
166	66	19-21, 10-12, 11-13	2.5	33	8.33
150	60	17-19, 10-12, 11-13	2.5	30	7.5
reserved	-	17-19, 10-12, 9-11	-	-	-
reserved	-	17-19, 12-14, 11-13	-	-	-
reserved	-	19-21, 10-12, 9-11	-	-	-
reserved	-	19-21, 12-14, 11-13	-	-	-

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