Processor

80486SX/80487SX/80486DX/ODP486SX/80486DX2

Processor Speed

20/25/33/50(internal)/50/66(internal)MHz

Chip Set

OPTI

Max. Onboard DRAM

128MB

Cache

64/128/256KB

BIOS

MYLEX

Dimensions

330mm x 218mm

I/O Options

IDE interface, parallel port, serial ports (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Serial port 1

COM1

Speaker

P19

Serial port 2

COM2

Power LED & keylock

P20

Parallel port

P4

IDE interface LED

P21

Floppy drive interface

P5

Turbo LED

P23

IDE interface port

P8

32-bit VESA Local bus slot

S1

Reset switch

P18

32-bit VESA Local bus slot

S2

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Factory configured - do not alter

J1

On

»

Factory configured - do not alter

J2

pins 2 & 3 closed

»

Factory configured - do not alter

J3

pins 1 & 2 closed

»

Factory configured - do not alter

J4

Open

»

Factory configured - do not alter

J8

Closed

»

Factory configured - do not alter

J12

Closed

»

Factory configured - do not alter

J16

Closed

»

Factory configured - do not alter

J17

Closed

»

Factory configured - do not alter

J19

Closed

»

Factory configured - do not alter

J21

Closed

»

Factory configured - do not alter

J23

Closed

»

Factory configured - do not alter

J30

Open

»

Monitor type select color

P1

Closed

Monitor type select monochrome

P1

Open

CACHE CONFIGURATION

Size

Max Cachable

Bank 0

Bank 1

TAG 0

TAG 1

64KB

16MB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

NONE

128KB

32MB

(4) 32K x 8

NONE

(1) 8K x 8

NONE

256KB

63MB

(4) 32K x 8

(4) 32K x 8

(1) 8K x 8

(1) 8K x 8

CACHE JUMPER CONFIGURATION

Size

J11

J18

J20

J22

J24

64KB

pins 2 & 3 closed

Open

Open

Open

Open

128KB

pins 1 & 2 closed

Open

Closed

Open

Closed

256KB

pins 2 & 3 closed

Closed

Closed

Closed

Closed

CPU TYPE CONFIGURATION

Type

J7

J13

80486SX

pins 2 & 3 closed

Open

80487SX

pins 1 & 2 and 3 & 4 closed

pins 1 & 2 closed

80486DX

pins 1 & 2 and 3 & 4 closed

pins 2 & 3 closed

ODP486SX

pins 1 & 2 and 3 & 4 closed

pins 1 & 2 closed

80486DX2

pins 1 & 2 and 3 & 4 closed

pins 2 & 3 closed

CPU SPEED CONFIGURATION

Speed

J5

J6

J25

J26

J27

J28

J29

20MHz

pins 1 & 2

pins 1 & 2

Open

Open

Closed

Open

Open

25MHz

pins 2 & 3

pins 1 & 2

Closed

Open

Open

Open

Closed

33MHz

pins 2 & 3

pins 1 & 2

Open

Closed

Open

Open

Closed

50i MHz

pins 2 & 3

pins 1 & 2

Closed

Open

Open

Open

Closed

50MHz

pins 2 & 3

pins 2 & 3

Closed

Closed

Open

Closed

Closed

66i MHz

pins 2 & 3

pins 1 & 2

Open

Closed

Open

Open

Closed

Note:Pins designated should be in the closed position.

LOCAL BUS ENABLE JUMPERS

Setting

J9

J10

J14

J15

Enabled

pins 2 & 3

pins 2 & 3

pins 2 & 3

pins 2 & 3

Disabled

pins 1 & 2

pins 1 & 2

pins 1 & 2

pins 1 & 2

Note:Pins designated should be in the closed position.

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

2MB

(1) 512K x 36

None

None

None

4MB

(1) 512K x 36

(1) 512K x 36

None

None

4MB

(1) 1M x 36

None

None

None

6MB

(1) 512K x 36

(1) 1M x 36

None

None

6MB

(1) 512K x 36

(1) 512K x 36

(1) 512K x 36

None

8MB

(1) 1M x 36

(1) 1M x 36

None

None

8MB

(1) 2M x 36

(1) 2M x 36

None

None

8MB

(1) 512K x 36

(1) 512K x 36

(1) 512K x 36

(1) 512K x 36

10MB

(1) 512K x 36

(1) 2M x 36

None

None

12MB

(1) 1M x 36

(1) 2M x 36

None

None

12MB

(1) 512K x 36

(1) 512K x 36

(1) 2M x 36

None

12MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

None

14MB

(1) 512K x 36

(1) 1M x 36

(1) 2M x 36

None

16MB

(1) 2M x 36

(1) 2M x 36

None

None

16MB

(1) 4M x 36

None

None

None

16MB

(1) 1M x 36

(1) 1M x 36

(1) 2M x 36

None

16MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

18MB

(1) 512K x 36

(1) 2M x 36

(1) 2M x 36

None

20MB

(1) 512K x 36

(1) 512K x 36

(1) 2M x 36

(1) 2M x 36

20MB

(1) 1M x 36

(1) 2M x 36

(1) 2M x 36

None

22MB

(1) 512K x 36

(1) 1M x 36

(1) 2M x 36

(1) 2M x 36

24MB

(1) 1M x 36

(1) 1M x 36

(1) 2M x 36

(1) 2M x 36

24MB

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

None

24MB

(1) 1M x 36

(1) 1M x 36

(1) 4M x 36

None

26MB

(1) 512K x 36

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

28MB

(1) 1M x 36

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

32MB

(1) 4M x 36

(1) 4M x 36

None

None

32MB

(1) 8M x 36

None

None

None

32MB

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

32MB

(1) 2M x 36

(1) 2M x 36

(1) 4M x 36

None

40MB

(1) 1M x 36

(1) 1M x 36

(1) 4M x 36

(1) 4M x 36

40MB

(1) 1M x 36

(1) 1M x 36

(1) 8M x 36

None

48MB

(1) 2M x 36

(1) 2M x 36

(1) 4M x 36

(1) 4M x 36

48MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

None

48MB

(1) 2M x 36

(1) 2M x 36

(1) 8M x 36

None

DRAM CONFIGURATION (CONT.)

Size

Bank 0

Bank 1

Bank 2

Bank 3

64MB

(1) 8M x 36

(1) 8M x 36

None

None

64MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

64MB

(1) 4M x 36

(1) 4M x 36

(1) 8M x 36

None

72MB

(1) 1M x 36

(1) 1M x 36

(1) 8M x 36

(1) 8M x 36

80MB

(1) 2M x 36

(1) 2M x 36

(1) 8M x 36

(1) 8M x 36

96MB

(1) 4M x 36

(1) 4M x 36

(1) 8M x 36

(1) 8M x 36

96MB

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

None

128MB

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36