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Parts Information

Document ID: DDSE-44RKHF

PC Server 300 - 486DX2 Jumper Settings

Applicable to: World-Wide

Jumper Settings (486DX2 System Board)
A label (diagram) showing the following jumper locations is located on the top of the base frame assembly inside the system unit.

Jumper Settings (Central Processing Unit (CPU) Selection)

Jumper	Configuration	Setting
W2	486SX All other CPUs (Default)	Pins 2-3, 1-2 and 3-4
W3	P24T CPU All others CPUs (Default)	Not Installed Installed
W16	25MHz 33MHz (Default)	Not Installed Installed
W20	25MHz 33MHz (Default)	Installed Not Installed
W33	DX4 DX4 internal double clock 468SX, DX2, DX, and DX4 internal clock tripler (Default)	Pins 1-2 Pins 2-3 Not Installed

ISA IDE Selection

Jumper	Configuration	Setting
W42	ISA IDE uses ISA IRQ 14 ISA IDE uses ISA IRQ 15	Pins 1-2 Pins 2-3
W43	ISA IDE uses DMA channel 6 ISA IDE uses DMA channel 7 ISA IDE uses P10 transfer (Default)	Pins 1-2 Pins 2-3 Not Installed

Keyboard Selection

Jumper	Configuration	Setting
W10	PS/2 Mouse installed (Default) PS/2 Mouse not installed	Installed Not Installed

Tag Selection

Jumper	Configuration	Setting
W24	7-Bit Tag 8-Bit Tag 9-Bit Tag (Default) Illegal	Not Installed Installed Installed Not Installed
W26	7-Bit Tag 8-Bit Tag 9-Bit Tag (Default) Illegal	Installed Installed Not Installed Not Installed

BIOS Mode Selection

Jumper	Configuration	Setting
W6	BIOS in normal mode (Default) BIOS in boot recovery mode	Pins 2-3 Pins 1-2

DPU Selection

Jumper	Configuration	Setting
W17	DPU generate parity CPU generate parity	Pins 1-2 Pins 2-3
W18	DPU forces parity error DPU does not force parity error (Default)	Pins 1-2 Pins 2-3

PCI Port Selection

Jumper	Configuration
J20	PCI #1 (master/slave shared with EISA slot J17)
J19	PCI #2 (master/slave)
J18	PCI #3 (master/slave)

PCI Compliant IRQ Jumper Header

Jumper	Setting
J101	Open (Default) Pin 2: Route to ISA IRQ1 Pin 3: Route to ISA IRQ3 Pin 4: Route to ISA IRQ4 Pin 5: Route to ISA IRQ5 Pin 6: Route to ISA IRQ6 Pin 7: Route to ISA IRQ7 Pin 8: Route to ISA IRQ8 Pin 9: Route to ISA IRQ9 Pin 10: Route to ISA IRQ10 Pin 11: Route to ISA IRQ11 Pin 12: Route to ISA IRQ12 Pin 13: Route to ISA IRQ14 Pin 14: Route to ISA IRQ15

Cache Selections

Jumper	Configuration	Setting
W1	Secondary cache in write-through mode Secondary cache in write-back mode (Default)	Pins 1-2 Pins 2-3
W4	Internal cache in write-through mode (Default) Internal cache in write-back mode	Not Installed Installed
W5	128KB of secondary cache 256KB of secondary cache (Default)	Not Installed Installed
W21	Secondary cache not installed Secondary cache installed (Default)	Installed Not Installed
W22	128KB of secondary cache 256KB of secondary cache (Default)	Installed Not Installed
W23	128KB of secondary cache 256KB of secondary cache (Default)	Not Installed Installed

PCI IDE Selection

Jumper	Configuration	Setting
W35	PCI IDE uses ISA IRQ 14 (Default) PCI IDE does not use ISA IRQ 14	Installed Not Installed
W37	PCI IDE uses PCI INTR_A (Default) PCI IDE does not use PCI INTR_A (Default)	Installed Not Installed
W38	PCI uses ISA IRQ 15 PCI does not use ISA IRQ 15 (Default)	Installed Not Installed

Reserved Jumpers

Jumper	Setting
W8	Installed

	Search Keywords
	Document Category	Processors
	Date Created	03-02-99
	Last Updated	03-02-99
	Revision Date	03-02-2000
	Brand	IBM PC Server
	Product Family	PC Server 300
	Machine Type	8640
	Model
	TypeModel
	Retain Tip (if applicable)
	Reverse Doclinks and Admin Purposes