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OPTI-495WB

DATAEXPERT CORPORATION

OPTI-495WB

Processor

80486SX/80486DX/ODP486SX

Processor Speed

25/33MHz

Chip Set

OPTI

Max. Onboard DRAM

32MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

J1

Turbo switch

J4

Speaker

J2

Turbo LED

J5

Reset switch

J3

External battery

J6

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

CMOS memory normal operation

J6

pins 2 & 3 closed

 

CMOS memory clear

J6

pins 3 & 4 closed

Monitor type select color

JP10

Closed

 

Monitor type select monochrome

JP10

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 (U17)

TAG (U18)

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

(1) 64K x 1

128KB

(4) 32K x 8

NONE

(1) 8K x 8

(1) 64K x 1

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

(1) 64K x 1

CACHE JUMPER CONFIGURATION

Size

JP4

JP5

JP6

JP7

JP13

64KB

2 & 3

Open

Open

Open

Open

128KB

1 & 2

Open

Open

Closed

Closed

256KB

2 & 3

Closed

Open

Closed

Closed

Note:Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

JP1

JP2

JP3

80486SX

Open

pins 2 & 3 closed

Open

ODP486SX

Closed

pins 1 & 2 closed

pins 1 & 2 closed

80486DX

Closed

pins 1 & 2 closed

pins 2 & 3 closed