PCI 486 Motherboard Settings and Configuration

Processor

80486SX/80486DX/80486DX2/Pentium Overdrive

Processor Speed

25/33/50(internal)/66(internal)MHz

Chip Set

Intel

Max. Onboard DRAM

128MB

Cache

64/128/256/512KB

BIOS

Phoenix

Dimensions

330mm x 218mm

I/O Options

PCI local bus slots (3)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Hard drive LED

CN1

SCSI connector

J25

Speaker

CN2

PCI local bus

PCI1

Reset switch

CN3

PCI local bus

PCI2

Power LED & keylock

CN4

PCI local bus

PCI3

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

CMOS memory normal operation

CN5

Pins 1 & 2 closed

CMOS memory clear

CN5

Pins 2 & 3 closed

»

Factory configured - do not alter

J12

N/A

»

SCSI interrupt select IRQ11

J14

Pins 2 & 3 closed

SCSI interrupt select IRQ9

J14

Pins 1 & 2 closed

»

Factory configured - do not alter

J15

N/A

»

Factory configured - do not alter

J16

N/A

»

Cache enabled

J17

Pins 2 & 3 closed

Cache disabled

J17

Pins 1 & 2 closed

»

SCSI terminator term power source from system

J24

Closed

SCSI terminator term power source from peripheral

J24

Open

CPU TYPE CONFIGURATION

Type

KC1

KC2

KC3

KC4

KC5

80486SX

Open

Open

Open

Closed

Open

80487SX

Open

Closed

Closed

Open

Closed

80486DX

Closed

Open

Closed

Open

Closed

ODP486SX

Open

Closed

Closed

Open

Closed

80486DX2

Closed

Open

Closed

Open

Closed

Pentium Overdrive

Open

Closed

Closed

Open

Closed

CACHE JUMPER CONFIGURATION

Size

J5

J6

J7

J11

J18

J19

64KB

Open

Open

Open

Pins 2 & 3

Pins 1 & 2

Pins 1 & 2

128KB

Open

Closed

Open

Pins 1 & 2

Pins 2 & 3

Pins 1 & 2

256KB

Open

Closed

Closed

Pins 1 & 2

Pins 1 & 2

Pins 2 & 3

512KB

Closed

Closed

Closed

Pins 1 & 2

Pins 2 & 3

Pins 2 & 3

Note:Pins designated should be in the closed position.

CPU SPEED CONFIGURATION

Speed

J13

J103

25MHz

Pins 1 & 2 closed

Open

33MHz

Pins 2 & 3 closed

Closed

50i MHz

Pins 1 & 2 closed

Open

66i MHz

Pins 2 & 3 closed

Closed

PCI INTERRUPT SELECTION

PCI1

J36A

J39A

J40A

J42A

J43A

J113A

IRQ3

Open

Open

Open

Open

Open

Closed

IRQ10

Open

Closed

Open

Open

Open

Open

IRQ11

Open

Open

Closed

Open

Open

Open

IRQ14

Open

Open

Open

Closed

Open

Open

IRQ15

Open

Open

Open

Open

Closed

Open

IRQ25

Closed

Open

Open

Open

Open

Open

PCI INTERRUPT SELECTION

PCI2

J36B

J39B

J40B

J42B

J43B

J113B

IRQ3

Open

Open

Open

Open

Open

Closed

IRQ10

Open

Closed

Open

Open

Open

Open

IRQ11

Open

Open

Closed

Open

Open

Open

IRQ14

Open

Open

Open

Closed

Open

Open

IRQ15

Open

Open

Open

Open

Closed

Open

IRQ25

Closed

Open

Open

Open

Open

Open

PCI INTERRUPT SELECTION

PCI3

J36C

J39C

J40C

J42C

J43C

J113C

IRQ3

Open

Open

Open

Open

Open

Closed

IRQ10

Open

Closed

Open

Open

Open

Open

IRQ11

Open

Open

Closed

Open

Open

Open

IRQ14

Open

Open

Open

Closed

Open

Open

IRQ15

Open

Open

Open

Open

Closed

Open

IRQ25

Closed

Open

Open

Open

Open

Open

LOCAL BUS MASTER SELECTION

Master

J104

J105

»

PCI 3

Pins 2 & 3 closed

Pins 2 & 3 closed

PCI 1

Pins 1 & 2 closed

Pins 1 & 2 closed

LOCAL BUS MASTER SELECTION

Master

J106

J107

»

SCSI

Pins 2 & 3 closed

Pins 2 & 3 closed

PCI 2

Pins 1 & 2 closed

Pins 1 & 2 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

2MB

(2) 256K x 36

NONE

4MB

(2) 256K x 36

(2) 256K x 36

4MB

(2) 512K x 36

NONE

6MB

(2) 256K x 36

(2) 512K x 36

6MB

(2) 512K x 36

(2) 256K x 36

8MB

(2) 512K x 36

(2) 512K x 36

8MB

(2) 1M x 36

NONE

10MB

(2) 256K x 36

(2) 1M x 36

10MB

(2) 1M x 36

(2) 256K x 36

12MB

(2) 512K x 36

(2) 1M x 36

12MB

(2) 1M x 36

(2) 512K x 36

16MB

(2) 1M x 36

(2) 1M x 36

16MB

(2) 2M x 36

NONE

18MB

(2) 256K x 36

(2) 2M x 36

18MB

(2) 2M x 36

(2) 256K x 36

20MB

(2) 512K x 36

(2) 2M x 36

20MB

(2) 2M x 36

(2) 512K x 36

24MB

(2) 1M x 36

(2) 2M x 36

24MB

(2) 2M x 36

(2) 1M x 36

32MB

(2) 2M x 36

(2) 2M x 36

32MB

(2) 4M x 36

NONE

34MB

(2) 256K x 36

(2) 4M x 36

34MB

(2) 4M x 36

(2) 256K x 36

36MB

(2) 512K x 36

(2) 4M x 36

36MB

(2) 4M x 36

(2) 512K x 36

40MB

(2) 1M x 36

(2) 4M x 36

40MB

(2) 4M x 36

(2) 1M x 36

48MB

(2) 2M x 36

(2) 4M x 36

48MB

(2) 4M x 36

(2) 2M x 36

64MB

(2) 4M x 36

(2) 4M x 36

64MB

(2) 8M x 36

NONE

66MB

(2) 256K x 36

(2) 8M x 36

66MB

(2) 8M x 36

(2) 256K x 36

68MB

(2) 512K x 36

(2) 8M x 36

68MB

(2) 8M x 36

(2) 512K x 36

72MB

(2) 1M x 36

(2) 8M x 36

72MB

(2) 8M x 36

(2) 1M x 36

80MB

(2) 2M x 36

(2) 8M x 36

80MB

(2) 8M x 36

(2) 2M x 36

96MB

(2) 4M x 36

(2) 8M x 36

96MB

(2) 8M x 36

(2) 4M x 36

128MB

(2) 8M x 36

(2) 8M x 36