Processor

80486SX/80487SX/80486SX-SL/80486DX/80486DX-SL

Processor Speed

25/33/40/50MHz

Chip Set

SIS

Max. Onboard DRAM

32MB

Cache

128/256KB

BIOS

Phoenix

Dimensions

254mm x 218mm

I/O Options

32-Bit VESA local bus slots (3)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Internal keyboard connector

CN1

Power saving switch

JG3

External battery

JB

32-Bit VESA local bus slot

S1

Green Function

JC7

32-Bit VESA local bus slot

S2

Monitor power control

JG1

32-Bit VESA local bus slot

S3

Green PC LED

JG2

PIN OUT CONFIGURATION

Connector

JFP

Keylock

pins 1 & 2 closed

Power LED

pins 3 & 5 closed

Turbo LED

pins 12 & 13 closed

Turbo switch

pins 15, 16, & 17 closed

Reset

pins 19 & 20 closed

Speaker

pins 7, 8, 9, & 10 closed

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

CPU PQFP not installed

JC1

Closed

CPU PQFP installed

JC1

Open

»

Monitor type select monochrome

JP1

Open

Monitor type select color

JP1

Closed

»

Factory configured - do not alter

JP4A

pins 1 & 2 closed

»

Factory configured - do not alter

JP16

N/A

»

Normal VL-bus card installed

JP23

Open

Special VL-bus card installed

JP23

Closed

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

128KB

(4) 32K x 8

NONE

(1) 8K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JS1

JS2

128KB

pins 1 & 2 closed

pins 1 & 2 closed

256KB

pins 2 & 3 closed

pins 2 & 3 closed

CPU TYPE CONFIGURATION

Type

JC2

JC3

JC4

JC5

JC6

JC8

JC9

80486SX

Open

pins 2 & 3

N/A

N/A

Open

Closed

Closed

80486SX-SL

pins 2 & 3

pins 2 & 3

pins 1 & 2

pins 1 & 2

Open

Closed

Closed

80487SX

Open

1 & 2, 3 & 4

N/A

N/A

pins 1 & 2

Open

Open

80486DX

Open

1 & 2, 3 & 4

N/A

N/A

pins 2 & 3

Open

Open

80486DX-SL

pins 2 & 3

1 & 2, 3 & 4

pins 1 & 2

pins 1 & 2

pins 2 & 3

Closed

Closed

Note: Pins designated should be in the closed position.

VESA WAIT STATE/BUS SPEED CONFIGURATION

Speed

Wait states

JP8

JP9

< 33MHz

0 wait states

Open

Open

>33MHz

1 wait state

Closed

Closed

CPU SPEED CONFIGURATION

Speed

JK1

JK2

JK3

JK4

25MHz

Open

Open

Closed

pins 2 & 3 closed

33MHz

Closed

Open

Open

pins 2 & 3 closed

40MHz

Closed

Closed

Open

pins 2 & 3 closed

50MHz

Open

Closed

Open

pins 1 & 2 closed

DRAM BANK AND JUMPER CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

JM1

JM2

JM3

4MB

(1) 256KB x 36 DS

(1) 512KB x 36

NONE

1 & 2

N/A

N/A

4MB

(1) 256K x 36

(1) 512KB x 36

(4) 256K x 9

1 & 2

4 & 5

1 & 2

4MB

(1) 512KB x 36

(1) 512KB x 36

NONE

2 & 3

N/A

N/A

4MB

(1) 1M x 36

NONE

NONE

N/A

N/A

N/A

4MB

NONE

NONE

(4) 1M x 9

N/A

N/A

2 & 3

8MB

(1) 256KB x 36 DS

(1) 512KB x 36

(4) 1M x 9

1 & 2

1 & 2

1 & 2

8MB

(1) 256KB x 36 DS

(1) 1M x 36

NONE

1 & 2

N/A

N/A

8MB

(1) 256KB x 36 DS

NONE

(4) 1M x 9

N/A

2 & 3

1 & 2

8MB

(1) 1M x 36

(1) 1M x 36

NONE

2 & 3

N/A

N/A

8MB

(1) 1M x 36

NONE

(4) 1M x 9

N/A

4 & 5

1 & 2

8MB

(1) 1M x 36 DS

NONE

NONE

N/A

N/A

N/A

12MB

(1) 256KB x 36 DS

(1) 1M x 36

(4) 1M x 9

1 & 2

1 & 2

1 & 2

12MB

(1) 1M x 36

(1) 1M x 36

(4) 1M x 9

1 & 2

4 & 5

1 & 2

16MB

(1) 1M x 36 DS

(1) 1M x 36

(4) 1M x 9

1 & 2

1 & 2

1 & 2

16MB

(1) 1M x 36 DS

(1) 1M x 36 DS

NONE

1 & 2

1 & 2

1 & 2

16MB

(1) 4M x 36

NONE

NONE

N/A

N/A

N/A

16MB

NONE

NONE

(4) 4M x 9

N/A

N/A

2 & 3

20MB

(1) 2M x 36

(1) 2M x 36

(4) 4M x 9

2 & 3

2 & 3

1 & 2

24MB

(1) 2M x 36 DS

(1) 4M x 36

(4) 4M x 9

1 & 2

1 & 2

1 & 2

32MB

(1) 4M x 36

(1) 4M x 36

NONE

2 & 3

N/A

N/A

64MB

(1) 4M x 36 DS

(1) 4M x 36 DS

NONE

1 & 2

1 & 2

1 & 2

64MB

(1) 4M x 36 DS

(1) 4M x 36

(4) 4M x 9

1 & 2

1 & 2

1 & 2

Note:Pins designated should be in the closed position.