Processor

80486SX/80486DX/ODP486SX/80486DX2/CX486SX

Processor Speed

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

Chip Set

UMC

Max. Onboard DRAM

64MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

230mm x 218mm

I/O Options

32-bit VESA local bus slots (3)

NPU Options

CX487SX

CONNECTIONS

Purpose

Location

Purpose

Location

Speaker

J1

Power LED & keylock

JP6

External battery

J2

32-bit VESA Local bus slot

S1

Turbo LED

JP3

32-bit VESA Local bus slot

S2

Turbo switch

JP4

32-bit VESA Local bus slot

S3

Reset switch

JP5

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Monitor type select color

JP11

pins 2 & 3 closed

Monitor type select monochrome

JP11

pins 1 & 2 closed

»

Weitek Power 9000 VESA VGA card not installed

JP18

pins 1 & 2 closed

Weitek Power 9000 VESA VGA card installed

JP18

pins 2 & 3 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

1MB

(4) 256K x 9

NONE

2MB

(4) 256K x 9

(4) 256K x 9

4MB

(4) 1M x 9

NONE

5MB

(4) 256K x 9

(4) 1M x 9

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

20MB

(4) 1M x 9

(4) 4M x 9

32MB

(4) 4M x 9

(4) 4M x 9

64MB

(4) 16M x 9

NONE

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

128KB

(4) 32K x 8

NONE

NONE

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP13

JP15

JP16

JP17

64KB

Open

Open

pins 1 & 2 closed

Open

128KB

pins 2 & 3 closed

Open

pins 2 & 3 closed

Closed

256KB

pins 1 & 2 closed

Closed

pins 1 & 2 closed

Closed

CPU TYPE CONFIGURATION

PGA

Socket

JP7

JP8

JP12

80386DX

PGA

pins 2 & 3 closed

Open

Closed

80486SX

PQFP

pins 2 & 3 closed

Open

Open

80486SX

PGA

N/A

N/A

Closed

80486DX

PQFP

pins 1 & 2 and 3 & 4

pins 2 & 3 closed

Open

80486DX

PGA

N/A

N/A

Closed

80486DX2

PQFP

pins 1 & 2 and 3 & 4

pins 2 & 3 closed

Open

80486DX2

PGA

N/A

N/A

Closed

ODP486SX

PQFP

pins 1 & 2 and 3 & 4

pins 1 & 2 closed

Open

ODP486SX

PGA

N/A

N/A

Closed

CX486SX/CX487SX

PGA

pins 1 & 2 and 3 & 4

pins 2 & 3 closed

Closed

CPU SPEED CONFIGURATION

Speed

JP9

JP10

25MHz

Closed

Closed

33MHz

Open

Closed

40MHz

Closed

Open

50i MHz

Closed

Closed

66i MHz

Open

Closed

NPU CONFIGURATION

CX487SX

JP19

JP20

JP21

Installed

pins 2 & 3 closed

pins 1 & 2 closed

pins 1 & 2 closed

Not installed

pins 1 & 2 closed

pins 2 & 3 closed

pins 2 & 3 closed

VESA WAIT STATE/BUS SPEED CONFIGURATION

CPU speed

Wait states

JP1

JP2

£ 33MHz

0 wait states

Open

Open

> 33MHz

1 wait state

Closed

Closed