Processor

80486SX/80487SX/80486DX/80486DX2/ODP586SX

Processor Speed

20/25/33/40/50(internal)/50/66(internal)MHz

Chip Set

SIS

Max. onboard DRAM

64MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

32-bit VESA riser card slot, floppy drive interface, ISA riser card slot, parallel port, PS/2 mouse port, PS/2 keyboard port, serial ports (2), VGA port

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

VGA port

C1

Power LED & keylock

J1

Parallel port

C2

Turbo LED

J3

Serial port

C3

Turbo switch

J4

Serial port

C4

Reset switch

J5

PS/2 mouse

C5

Speaker

J9

PS/2 keyboard

C6

ISA riser card slot

S1

IDE interface

C7

32-bit VESA riser card slot

S2

Floppy drive interface

C8

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Monitor type select color

JP6

Open

Monitor type select monochrome

JP6

Closed

»

CMOS memory normal operation

JP7

Open

CMOS memory clear

JP7

Closed

»

Power good signal detect from board

JP8

pins 1 & 2 closed

Power good signal detect from power supply

JP8

pins 2 & 3 closed

»

Factory configured - do not alter

JP14

pins 2 & 3 closed

»

Factory configured - do not alter

JP15

pins 2 & 3 closed

»

PQFP 80486SX disabled

JP102

pins 1 & 2 closed

PQFP 80486SX enabled

JP102

pins 2 & 3 closed

»

PS/2 mouse port enabled

JP103

pins 1 & 2 closed

PS/2 mouse port disabled

JP103

pins 2 & 3 closed

»

IDE interface enabled

S1

pins 1 & 2 closed

IDE interface disabled

S1

pins 2 & 3 closed

»

Factory configured - do not alter

S2

pins 1 & 2 closed

»

Factory configured - do not alter

S3

pins 1 & 2 closed

»

Factory configured - do not alter

S4

pins 2 & 3 closed

I/O JUMPER CONFIGURATION

Floppy(C8)

C3

C4

C2

JP20

JP19

JP18

JP17

JP16

Enabled

COM1

COM2

LPT2

1 & 2

2 & 3

2 & 3

1 & 2

1 & 2

Enabled

COM1

COM2

LPT1

1 & 2

2 & 3

2 & 3

1 & 2

2 & 3

Enabled

COM3

COM4

LPT1

1 & 2

2 & 3

2 & 3

2 & 3

1 & 2

Enabled

COM2

COM3

LPT2

1 & 2

2 & 3

2 & 3

2 & 3

2 & 3

Disabled

COM1

COM2

LPT2

2 & 3

1 & 2

2 & 3

1 & 2

1 & 2

Disabled

COM1

COM2

LPT1

2 & 3

1 & 2

2 & 3

1 & 2

2 & 3

Disabled

COM3

COM4

LPT1

2 & 3

1 & 2

2 & 3

2 & 3

1 & 2

Disabled

COM2

COM3

LPT2

2 & 3

1 & 2

2 & 3

2 & 3

2 & 3

Enabled

Disabled

Disabled

Disabled

2 & 3

2 & 3

2 & 3

2 & 3

1 & 2

Disabled

Disabled

Disabled

Disabled

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

Note:Pins designated should be in the closed position.

ONBOARD VGA JUMPER CONFIGURATION

Onboard VGA port

T2JP1

T2JP2

T2JP3

Enabled

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

Disabled

pins 3 & 4 closed

pins 3 & 4 closed

pins 3 & 4 closed

VGA WAIT STATE CONFIGURATION

Wait State

JP12

JP13

0 (25MHz)

pins 2 & 3 closed

pins 2 & 3 closed

1 (33MHz)

pins 2 & 3 closed

pins 1 & 2 closed

2 (40MHz)

pins 1 & 2 closed

pins 2 & 3 closed

3 (50MHz)

pins 1 & 2 closed

pins 1 & 2 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank3

JP100

JP101

1MB

256K x 36

NONE

NONE

NONE

Open

Open

2MB

256K x 36

256K x 36

NONE

NONE

Open

Open

2MB

512K x 36

NONE

NONE

NONE

pins 1 & 2

Open

4MB

1M x 36

NONE

NONE

NONE

Open

Open

6MB

256K x 36

256K x 36

1M x 36

NONE

Open

Open

6MB

512K x 36

NONE

1M x 36

NONE

pins 1 & 2

Open

8MB

1M x 36

1M x 36

NONE

NONE

Open

Open

8MB

2M x 36

NONE

NONE

NONE

pins 1 & 2

Open

10MB

256K x 36

256K x 36

1M x 36

1M x 36

Open

Open

10MB

512K x 36

NONE

1M x 36

1M x 36

pins 1 & 2

Open

12MB

1M x 36

1M x 36

1M x 36

NONE

Open

Open

12MB

2M x 36

NONE

1M x 36

NONE

pins 1 & 2

Open

16MB

1M x 36

1M x 36

1M x 36

1M x 36

Open

Open

16MB

2M x 36

NONE

1M x 36

1M x 36

pins 1 & 2

Open

16MB

2M x 36

2M x 36

NONE

NONE

pins 2 & 3

Closed

16MB

4M x 36

NONE

NONE

NONE

Open

Open

18MB

256K x 36

256K x 36

256K x 36

NONE

Open

Open

18MB

512K x 36

NONE

4M x 36

NONE

pins 1 & 2

Open

20MB

1M x 36

4M x 36

NONE

NONE

Open

Open

24MB

1M x 36

1M x 36

4M x 36

NONE

Open

Open

24MB

2M x 36

NONE

4M x 36

NONE

pins 1 & 2

Open

32MB

4M x 36

4M x 36

NONE

NONE

Open

Open

32MB

8M x 36

NONE

NONE

NONE

pins 1 & 2

Open

36MB

1M x 36

4M x 36

4M x 36

NONE

Open

Open

40MB

1M x 36

1M x 36

4M x 36

4M x 36

Open

Open

40MB

2M x 36

NONE

4M x 36

4M x 36

pins 1 & 2

Open

40MB

2M x 36

8M x 36

NONE

NONE

pins 2 & 3

Closed

48MB

4M x 36

4M x 36

4M x 36

NONE

Open

Open

48MB

8M x 36

NONE

4M x 36

NONE

pins 1 & 2

Open

64MB

4M x 36

4M x 36

4M x 36

4M x 36

Open

Open

64MB

8M x 36

8M x 36

NONE

NONE

pins 2 & 3

Closed

64MB

8M x 36

NONE

4M x 36

4M x 36

pins 1 & 2

Open

Note:Pins designated should be in the closed position.

CACHE CONFIGURATION

Size

Cache

Location

64KB

(8) 8K x 8

Banks 0 & 1

128KB

(4) 32K x 8

Bank 0

256KB

(8) 32K x 8

Banks 0 & 1

CACHE JUMPER CONFIGURATION

Size

SR1

SR2

SR3

SR4

SR5

64KB

pins 1 & 2

pins 1 & 2

pins 2 & 3

pins 1 & 2

pins 1 & 2

128KB

pins 1 & 2

pins 2 & 3

pins 1 & 2

pins 1 & 2

pins 2 & 3

256KB

pins 2 & 3

pins 2 & 3

pins 2 & 3

pins 2 & 3

pins 2 & 3

CPU TYPE CONFIGURATION

Jumper

80486DX/80486DX2

80486SX

80487SX/ODP586SX

T3JP1A

Closed

Open

Open

T3JP1B

Open

Closed

Open

T3JP1C

Open

Open

Closed

T3JP2A

Closed

Open

Open

T3JP2B

Open

Closed

Open

T3JP2C

Open

Open

Closed

T3JP3A

Closed

Open

Open

T3JP3B

Open

Closed

Open

T3JP3C

Open

Open

Closed

CPU SPEED CONFIGURATION

CPU speed

JP1

JP2

JP3

JP4

20MHz

pins 2 & 3

pins 2 & 3

pins 2 & 3

pins 2 & 3

25/50i MHz

pins 2 & 3

pins 2 & 3

pins 1 & 2

pins 1 & 2

33/66i MHz

pins 1 & 2

pins 2 & 3

pins 1 & 2

pins 1 & 2

40MHz

pins 1 & 2

pins 1 & 2

pins 2 & 3

pins 2 & 3

50MHz

pins 2 & 3

pins 2 & 3

pins 1 & 2

pins 2 & 3

VESA LOCAL BUS CONFIGURATION

CPU speed

Wait states

JP9

JP10

<=33MHz

0 wait states

pins 1 & 2 closed

pins 1 & 2 closed

>33MHz

1 wait state

pins 2 & 3 closed

pins 2 & 3 closed