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OPTI-495SX 3/486WB CACHE

UNIDENTIFIED

OPTI-495SX 3/486WB CACHE

Processor

80386DX/CX486DLC/80486SX/80487SX/80486DX/80486DX2

Processor Speed

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

Chip Set

OPTI

Max. Onboard DRAM

32MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

32-bit VESA local bus slots (2)

NPU Options

80387DX/CX487DLC

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

J1

Reset switch

J5

Speaker

J2

External battery

JP35

Turbo switch

J3

32-bit VESA local bus slots

SL1 & SL2

Turbo LED

J4

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Factory configured - do not alter

JP2

N/A

Factory configured - do not alter

JP3

N/A

Factory configured - do not alter

JP4

N/A

Factory configured - do not alter

JP5

N/A

Factory configured - do not alter

JP6

N/A

Factory configured - do not alter

JP17

N/A

Factory configured - do not alter

JP18

N/A

Factory configured - do not alter

JP19

N/A

Factory configured - do not alter

JP20

N/A

Factory configured - do not alter

JP21

N/A

Factory configured - do not alter

JP22

N/A

Factory configured - do not alter

JP23

N/A

Factory configured - do not alter

JP24

N/A

Factory configured - do not alter

JP31

N/A

Monitor type select monochrome

JP34

Open

 

Monitor type select color

JP34

Closed

CMOS memory normal operation

JP35

pins 2 & 3 closed

 

CMOS memory clear

JP35

pins 3 & 4 closed

 

Battery type select external

JP35

Closed

NPU type select 80387 PQFP

JP36

Open

 

NPU type select 80387 PGA

JP36

Closed

Factory configured - do not alter

S1

N/A

Factory configured - do not alter

S2

N/A

Factory configured - do not alter

S3

N/A

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

(4) 4M x 9

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

20MB

(4) 4M x 9

(4) 1M x 9

32MB

(4) 4M x 9

(4) 4M x 9

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

(1) 8K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP25

JP26

JP27

JP28

64KB

pins 2 & 3 closed

Open

Open

Open

128KB

pins 1 & 2 closed

Open

Closed

Closed

256KB

pins 2 & 3 closed

Closed

Closed

Closed

CPU TYPE CONFIGURATION

Type

JP7

80386DX (PQFP)

Open

80386DX (PGA)

Closed

CX486DLC

Closed

80486 (PQFP)

Open

80486 (PGA)

Closed

CPU TYPE CONFIGURATION (80486 PGA)

Type

JP8

JP29

JP30

80486SX

Open

pins 2 & 3 closed

Open

80487SX

pins 2 & 3 closed

pins 1 & 2 closed

Closed

80486DX

pins 1 & 2 closed

pins 1 & 2 closed

Closed

80486DX2

pins 1 & 2 closed

pins 1 & 2 closed

Closed

CPU SPEED CONFIGURATION (80386/CX486DLC)

Speed

JP1

JP10

JP11

JP12

JP16

JP33

25MHz

Open

Closed

1 & 2

2 & 3

2 & 3

1 & 2

33MHz

Closed

Open

1 & 2

2 & 3

2 & 3

1 & 2

40MHz

Open

Open

1 & 2

2 & 3

2 & 3

1 & 2

Note: Pins designated should be in the closed position.

CPU SPEED CONFIGURATION (80486)

Speed

JP1

JP10

JP11

JP12

JP16

JP33

25MHz

Open

Closed

2 & 3

1 & 2

1 & 2

2 & 3

33MHz

Closed

Open

2 & 3

1 & 2

1 & 2

2 & 3

50iMHz

Open

Closed

2 & 3

1 & 2

1 & 2

2 & 3

50MHz

Open

Closed

1 & 2

1 & 2

1 & 2

2 & 3

66iMHz

Closed

Open

2 & 3

1 & 2

1 & 2

2 & 3

Note: Pins designated should be in the closed position.