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OPTI-486WB

DATAEXPERT CORPORATION

OPTI-486WB

Processor

80486SX/80486DX

Processor Speed

25/33MHz

Chip Set

OPTI

Max. Onboard DRAM

32MB

Cache

64/128/256/512KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

Speaker

J1

Reset switch

J4

Turbo switch

J2

External battery

J22

Power LED & keylock

J3

Turbo LED

JP1

Note:On some board revisions, JP1, J2, and J4 are aligned to the left of the NPU.

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

CMOS memory normal operation

J22

pins 2 & 3 closed

 

CMOS memory clear

J22

pins 3 & 4 closed

Monitor type select color

JP12

Closed

 

Monitor type select monochrome

JP12

Open

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

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG (U34)

TAG (U35)

64KB

(8) 8K x 8

NONE

(1) 8K x 8

(1) 64K x 1

128KB

(8) 8K x 8

(8) 8K x 8

(1) 8K x 8

(1) 64K x 1

256KB

(8) 32K x 8

NONE

(1) 32K x 8

(1) 64K x 1

512KB

(8) 32K x 8

(8) 32K x 8

(1) 32K x 8

(1) 64K x 1

CACHE JUMPER CONFIGURATION

Size

JP6

JP7

JP8

JP9

JP10

64KB

Open

2 & 3

Open

Open

Open

128KB

Closed

2 & 3

Open

Open

Closed

256KB

Closed

2 & 3

Open

Closed

Closed

512KB

Closed

1 & 2

Closed

Closed

Closed

Note:Pins designated should be in the closed position.

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG (U34)

TAG (U35)

64KB

(8) 8K x 8

NONE

(1) 8K x 8

(1) 64K x 1

128KB

(8) 8K x 8

(8) 8K x 8

(1) 8K x 8

(1) 64K x 1

256KB

(8) 32K x 8

NONE

(1) 32K x 8

(1) 64K x 1

512KB

(8) 32K x 8

(8) 32K x 8

(1) 32K x 8

(1) 64K x 1

CPU TYPE CONFIGURATION

Type

JP2

JP3

JP4

80486SX

Open

pins 1 & 2 closed

Open

80486DX

pins 1 & 2 closed

pins 2 & 3 closed

Closed