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OPTI 486-25/33

UNIDENTIFIED

OPTI 486-25/33

Processor

80486SX

Processor Speed

25/33

Chip Set

OPTI

Max. Onboard DRAM

32MB

Cache

64/128KB (external cache card)

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

32-bit external memory card, 32-bit external cache card

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J1

Power LED & keylock

J27

Turbo LED

J25

Reset switch

SW1

Speaker

J26

32-bit external memory card

SL1

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor type select color

JP2

Closed

 

Monitor type select monochrome

JP2

Open

Cache enabled

JP5, JP6

Open

 

Cache disabled

JP5, JP6

Closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

1MB

(4) 256K x 9

NONE

NONE

NONE

2MB

(4) 256K x 9

(4) 256K x 9

NONE

NONE

3MB

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

NONE

4MB

(4) 1M x 9

NONE

NONE

NONE

4MB

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

5MB

(4) 256K x 9

(4) 1M x 9

NONE

NONE

6MB

(4) 256K x 9

(4) 256K x 9

(4) 1M x 9

NONE

7MB

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

(4) 1M x 9

8MB

(4) 1M x 9

(4) 1M x 9

NONE

NONE

12MB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

NONE

16MB

(4) 4M x 9

NONE

NONE

NONE

16MB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

32MB

(4) 4M x 9

(4) 4M x 9

NONE

NONE

36MB

(4) 4M x 9

(4) 4M x 9

(4) 1M x 9

NONE

40MB

(4) 4M x 9

(4) 4M x 9

(4) 1M x 9

(4) 1M x 9

Note:Banks 2 & 3 are located on the external memory card..

EXTERNAL CACHE CARD JUMPER CONFIGURATION

Size

JP1

JP2

JP3

JP4

JP5

64KB

1 & 2

Open

Open

1 & 2

1 & 2

128KB

2 & 3

Closed

Closed

2 & 3

2 & 3

Note:Pins designated should be in the closed position. JP1-5 are located on the external cache card.