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OPTI-495XLC 3/486WB CACHE

DATAEXPERT CORPORATION

OPTI-495XLC 3/486WB CACHE

Processor

80386DX/80486SX/80486DX/80486DX2/Pentium Overdrive

Processor Speed

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

Chip Set

OPTi

Max. Onboard DRAM

64MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

230mm 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 slot

S1

Reset switch

J4

32-bit VESA Local bus slot

S2

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

CMOS memory normal operation (Internal battery)

J6

pins 2 & 3 closed

 

CMOS memory clear

J6

pins 3 & 4 closed

Monitor type select color

JP21

Closed

 

Monitor type select monochrome

JP21

Open

Factory configured - do not alter

JP23

N/A

Battery type select - NI-CD recharge

JP26

pins 2 & 3 closed

 

Battery type select - Lithum discharge

JP26

pins 1 & 2 closed

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

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

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

80386/80486 CONFIGURATION

Type

JP14

JP15

JP20

JP25

JP30

80386

Open

Open

pins 2 & 3

pins 1 & 2

pins 2 & 3

80486

Closed

Closed

pins 1 & 2

pins 2 & 3

pins 1 & 2

Note:Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

JP2

JP18

JP19

80486SX (PGA)

Open

Open

pins 2 & 3 closed

80486SX (PQFP)

Open

Closed

pins 2 & 3 closed

80486DX

pins 1 & 2 closed

Closed

pins 1 & 2 closed

80486DX2

pins 1 & 2 closed

Closed

pins 1 & 2 closed

Pentium Overdrive

pins 2 & 3 closed

Closed

pins 1 & 2 closed

CPU SPEED CONFIGURATION

Speed

JP6

JP7

JP8

JP9

JP22

80386DX/33MHz

Open

Open

Closed

pins 1 & 2

Open

80486SX/25MHz

Open

Open

Open

pins 1 & 2

Closed

80486SX/33MHz

Open

Open

Closed

pins 1 & 2

Open

80486DX/25MHz

Open

Open

Open

pins 1 & 2

Closed

80486DX/40MHz

Open

Closed

Closed

pins 1 & 2

Open

80486DX/50i MHz

Open

Open

Open

pins 1 & 2

Closed

80486DX/50MHz

Open

Closed

Open

pins 1 & 2

Open

80486DX/66i MHz

Open

Open

Closed

pins 1 & 2

Open

Note:Pins designated should be in the closed position.