PCI 486 Motherboard Settings and Configuration

Processor

80486SX/80487SX/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

32-bit PCI bus slots (3), SCSI interface

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Speaker

J1

IDE interface LED

J9

Reset switch

J2

SCSI interface

CN1

Power LED & keylock

J3

32-bit PCI bus slots

P1, P2, P3

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

CMOS memory normal operation

J8

Open

CMOS memory clear

J8

Closed

»

External cache wait state select 0 wait state

J14

pins 2 & 3 closed

External cache wait state select 1 wait state

J14

pins 1 & 2 closed

»

Factory configured - do not alter

J15

Open

»

Factory configured - do not alter

J16

Open

»

Factory configured - do not alter

J17

Open

»

Factory configured - do not alter

J20

Open

»

Factory configured - do not alter

J21

Open

»

SCSI terminator term power select internal

J24

Closed

SCSI terminator term power select external peripheral

J24

Open

»

SCSI IRQ select IRQ11

J114

pins 2 & 3 closed

SCSI IRQ select IRQ9

J114

pins 1 & 2 closed

»

External cache enabled

JP17

pins 2 & 3 closed

External cache disabled

JP17

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

DRAM CONFIGURATION (CON'T)

Size

Bank 0

Bank 1

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

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

64KB

(4) 8K x 8

(4) 8K x 8

(1) 32K x 8; (1) 16K x 8; (1) 8K x 8

128KB

(4) 32K x 8

NONE

(1) 32K x 8; (1) 16K x 8; (1) 8K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8; (1) 16K x 8

512KB

(4) 128K x 8

NONE

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

J5

J6

J7

J11

J18

J19

64KB

Open

Open

Open

2 & 3

1 & 2

1 & 2

128KB

Open

Closed

Open

1 & 2

2 & 3

1 & 2

256KB

Open

Closed

Closed

1 & 2

1 & 2

2 & 3

512KB

Closed

Closed

Closed

1 & 2

2 & 3

2 & 3

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

KC1

KC2

KC3

KC4

KC5

80486SX

Open

Open

Open

Closed

Open

80487SX

Open

Closed

Closed

Open

Closed

80486DX/DX2

Closed

Open

Closed

Open

Closed

Overdrive

Open

Closed

Closed

Open

Closed

CPU SPEED CONFIGURATION

CPU speed

J13

J103

25MHz

pins 1 & 2 closed

Open

33MHz

pins 2 & 3 closed

Closed

50iMHz

pins 1 & 2 closed

Open

66iMHz

pins 2 & 3 closed

Closed

PCI MASTER CONFIGURATION

Master

J104

J105

»

PCI 3

pins 2 & 3 closed

pins 2 & 3 closed

PCI 1

pins 1 & 2 closed

pins 1 & 2 closed

PCI MASTER CONFIGURATION

Master

J106

J107

»

SCSI

pins 2 & 3 closed

pins 2 & 3 closed

PCI 2

pins 1 & 2 closed

pins 1 & 2 closed

PCI IRQ CONFIGURATION

IRQ

J36C/B/A

J39C/B/A

J40C/B/A

J42C/B/A

J43C/B/A

J113C/B/A

IRQ3

Closed

Open

Open

Open

Open

Open

IRQ5

Open

Closed

Open

Open

Open

Open

IRQ10

Open

Open

Closed

Open

Open

Open

IRQ11

Open

Open

Open

Closed

Open

Open

IRQ14

Open

Open

Open

Open

Closed

Open

IRQ15

Open

Open

Open

Open

Open

Closed