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OPTI-495SLC-3/486WB CACHE

UNIDENTIFIED

OPTI-495SLC-3/486WB CACHE

Processor

80386DX/80486SX/80486DX /80486DX2/ODP486SX

Processor Speed

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

Chip Set

OPTI

Max. Onboard DRAM

64MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

249mm x 218mm

I/O Options

32-bit VESA local bus slots (2),

NPU Options

80387DX

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

J1

Turbo LED

J5

Speaker

J2

External battery

J6

Turbo switch

J3

32-bit VESA Local bus slots

S1

Reset switch

J4

32-bit VESA Local bus slots

S2

USER CONFIGURABLE SETTINGS

Function

Jumper/Switch

Position

Monitor type select color

JP21

open

 

Monitor type select monochrome

JP21

closed

Factory configured - do not alter

JP23

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

17MB

(4) 256K x 9

(4) 4M x 9

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

64MB

(4) 16M x 9

NONE

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG(U18)

TAG(U19)

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

NONE

128KB

(4) 32K x 8

NONE

(1) 8K x 8

NONE

256KB

(4) 32K x 8

(4) 32K x 8

(1) 8K x 8

(1) 8K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

NONE

CACHE SIZE JUMPER CONFIGURATION

Size

JP10

JP11

JP16

JP17

64KB

pins 2 & 3 closed

pins 2 & 3 closed

open

open

128KB

pins 1 & 2 closed

pins 1 & 2 closed

closed

open

256KB

pins 2 & 3 closed

pins 2 & 3 closed

closed

closed

80386 AND CX80486DLC CPU CONFIGURATION

Speed

JP6

JP7

JP8

JP9

JP22

33MHz

closed

closed

open

pins 2 & 3

open

33MHz

closed

closed

open

pins 2 & 3

open

40MHz

closed

closed

closed

pins 2 & 3

open

Note:Pins designated should be in the closed position.

CPU TYPE SELECT

CPU Type

JP2

JP14

JP15

JP18

JP19

JP20

JP25

JP27

80386DX(PQFP)

N/A

open

open

N/A

N/A

2 & 3

1 & 2

1 & 2

80386DX(PGA)

N/A

open

closed

N/A

N/A

2 & 3

1 & 2

1 & 2

80486DLC(PGA)

N/A

closed

closed

N/A

N/A

1 & 2

2 & 3

2 & 3

80486SX(PGA)

open

closed

closed

open

2 & 3

1 & 2

2 & 3

2 & 3

80487SX

2 & 3

N/A

N/A

closed

1 & 2

N/A

N/A

N/A

80486DX

1 & 2

closed

closed

closed

1 & 2

1 & 2

2 & 3

2 & 3

ODP80486

2 & 3

closed

closed

closed

1 & 2

1 & 2

2 & 3

2 & 3

80486DX2

1 & 2

closed

closed

closed

1 & 2

1 & 2

2 & 3

2 & 3

Note:Pins designated should be in the closed position.

CPU SPEED CONFIGURATION

CPU Type

JP6

JP7

JP8

JP9

JP22

25MHz

open

open

open

pins 1 & 2

closed

33MHz

open

open

closed

pins 1 & 2

open

40MHz

open

closed

closed

pins 1 & 2

open

50i MHz

open

open

open

pins 1 & 2

closed

50MHz

open

closed

open

pins 1 & 2

open

66i MHz

open

open

closed

pins 1 & 2

open

Note:Pins designated should be in the closed position.