Processor

ODP486SX/80486DX2/AM486DX2/CX486DX2/80486DX4/Pentium Overdrive

Processor Speed

20/25/33/40/50/50(internal)/66(internal)/75(internal)/100(internal)MHz

Chip Set

OPTI

Max. Onboard DRAM

128MB

Cache

64/128/256/512KB

BIOS

AMI

Dimensions

220mm x 260mm

I/O Options

32-bit VESA local bus slots (3), green PC feature

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J1

Green monitor power supply

JP63

Power LED & keylock

JP2

External power management interface

JP68

Turbo LED

JP16

Reset switch

S1

Turbo switch

JP17

32-bit VESA Local bus slots

SL1,SL2,SL3

Speaker

JP18

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Monitor type select color

JP30

Closed

Monitor type select monochrome

JP30

Open

»

Normal CPU ADS# operation

JP36

pins 2 & 3

Delay CPU ADS# clock operation

JP36

pins 1 & 2

»

Power to CPU set at 5V

JP64

pins 1 & 3, 2 & 4

Power to CPU set at 3.3V (for Intel DX4 CPU)

JP64

pins 4 & 6, 3 & 5

»

Set CPU external operation clock to 3X

JP65

Open

Set CPU external operation clock to 2X

JP65

Closed

»

Cache size enabled 64KB or 256KB

JP67

Closed

Cache size enabled 128KB or 512KB

JP67

Open

Note:Jumper JP65, for any type of CPU other than above listed, leave "Open".

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

1MB

(4) 256K x 9

NONE

NONE

NONE

2MB

(1) 256K x 36

NONE

(1) 256K x 36

NONE

4MB

(4) 1M x 9

NONE

NONE

NONE

4MB

(1) 512K x 36

(1) 512K x 36

4MB

(1) 1M x 36

NONE

NONE

NONE

6MB

(1) 512K x 36

(1) 1M x 36

NONE

8MB

(1) 2M X 36

NONE

NONE

8MB

(1) 1M x 36

NONE

(1) 1M x 36

NONE

8MB

(4) 1M x 9

NONE

(1) 1M x 36

NONE

10MB

(1) 512K x 36

(1) 2M x 36

12MB

(1) 1M x 36

NONE

(1) 2M x 36

12MB

(4) 1M x 9

NONE

(1) 2M x 36

16MB

(4) 4M x 9

NONE

NONE

NONE

16MB

(1) 2M x 36

(1) 2M x 36

16MB

(1) 4M x 36

NONE

NONE

NONE

20MB

(4) 1M x 9

NONE

(1) 4M x 36

NONE

20MB

(1) 1M X 36

NONE

(1) 4M x 36

NONE

32MB

(4) 4M x 9

NONE

(1) 4M x 36

NONE

32MB

(1) 4M x 36

NONE

(1) 4M x 36

NONE

64MB

(4) 16M x 9

NONE

NONE

NONE

64MB

(1) 8M x 36

(1) 8M x 36

64MB

(1) 16M x 36

NONE

NONE

NONE

128MB

(1) 16M x 36

NONE

(1) 16M x 36

NONE

128MB

(4) 16M x 9

NONE

(1) 16M x 36

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) 32K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

512KB

(4) 128K x 8

NONE

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP10

JP11

JP13

JP50

64KB

Open

Open

pins 2 & 3 closed

Open

128KB

Open

Closed

pins 1 & 2 closed

Open

256KB

Closed

Closed

pins 2 & 3 closed

Open

512KB

Closed

Closed

pins 1 & 2 closed

Closed

INTERNAL CACHE TYPE CONFIGURATION

CPU Type

Internal Cache Type

JP58

JP59

P24T

Write-Through

Open

N/A

P24T

Write-Back

Closed

N/A

P24D

Write-Through

N/A

Open

P24D

Write-Back

N/A

Closed

CPU TYPE CONFIGURATION

Type

JP3

JP5

JP8

JP42

JP43

JP44

80486SX

Open

Open

pins 2 & 3

Open

pins 1 & 2

Open

AM486

pins 1 & 2

pins 2 & 3

pins 1 & 2

Open

pins 1 & 2

Open

Cx486S

Open

Open

pins 2 & 3

pins 2 & 3

pins 1 & 2

Open

80487SX

pins 2 & 3

pins 2 & 3

pins 1 & 2

Open

pins 1 & 2

Open

Cx486S2

Open

Open

pins 2 & 3

pins 2 & 3

pins 2 & 3

Open

80486DX

pins 1 & 2

pins 2 & 3

pins 1 & 2

Open

pins 1 & 2

Open

Cx486DX

pins 1 & 2

pins 2 & 3

pins 1 & 2

pins 2 & 3

pins 1 & 2

Open

Cx486DX2

pins 1 & 2

pins 2 & 3

pins 1 & 2

pins 2 & 3

pins 2 & 3

Open

P24C (DX4)

pins 1 & 2

pins 2 & 3

pins 1 & 2

pins 1 & 2

pins 1 & 2

Closed

P24T

pins 2 & 3

pins 2 & 3

pins 1 & 2

Open

pins 1 & 2

Open

P24D

pins 2 & 3

pins 2 & 3

pins 1 & 2

Open

pins 1 & 2

Open

Note:Pins designated are in the closed position.

CPU TYPE CONFIGURATION (CON'T)

Type

JP45

JP46

JP47

JP48

JP49

80486SX

Open

Open

Open

Open

pins 1 & 2

AMD486

Open

Open

Open

Open

pins 1 & 2

Cx486S

Open

Open

Closed

Closed

pins 1 & 2

80487SX

Open

Open

Open

Open

pins 1 & 2

Cx486S2

Open

Open

Closed

Closed

pins 2 & 3

80486DX

Open

Open

Open

Open

pins 1 & 2

Cx486DX

Open

Open

Closed

Closed

pins 1 & 2

Cx486DX2

Open

Open

Closed

Closed

pins 2 & 3

P24C (DX4)

Closed

Closed

Open

Open

pins 1 & 2

P24T

Open

Open

Open

Open

pins 1 & 2

P24D

Open

Open

Open

Open

pins 1 & 2

Note:Pins designated are in the closed position.

CPU TYPE (S-SERIES) CONFIGURATION

Type

JP3

JP5

JP8

JP42

JP43

JP44

80486SX

Open

Open

pins 2 & 3

pins 1 & 2

pins 1 & 2

Closed

80486DX

pins 1 & 2

pins 2 & 3

pins 1 & 2

pins 1 & 2

pins 1 & 2

Closed

Note:Pins designated are in the closed position.

CPU TYPE (S-SERIES) CONFIGURATION

Type

JP45

JP46

JP47

JP48

JP49

80486SX

Closed

Closed

Open

Open

pins 1 & 2

80486DX

Closed

Closed

Open

Open

pins 1 & 2

Note:Pins designated are in the closed position.

BUS SPEED (ID3) CONFIGURATION

CPU speed

JP34

<= 33MHz

Open

> 33MHz

Closed

VESA WAIT STATE (ID2) CONFIGURATION

Wait states

JP33

0 wait states

Open

1 wait state

Closed

SYSTEM CLOCK (NOT FOR P24C) CONFIGURATION

Frequency

JP21

JP22

JP23

20MHz

pins 2 & 3 closed

pins 2 & 3 closed

pins 1 & 2 closed

25MHz

pins 2 & 3 closed

pins 1 & 2 closed

pins 2 & 3 closed

33MHz

pins 1 & 2 closed

pins 2 & 3 closed

pins 2 & 3 closed

40MHz

pins 2 & 3 closed

pins 1 & 2 closed

pins 1 & 2 closed

50MHz

pins 1 & 2 closed

pins 2 & 3 closed

pins 1 & 2 closed

SYSTEM CLOCK (FOR P24C (DX4)) CONFIGURATION

Frequency

JP21

JP22

JP23

25MHz

pins 2 & 3 closed

Open

pins 2 & 3 closed

33MHz

Open

pins 2 & 3 closed

pins 2 & 3 closed

50MHz

Open

pins 2 & 3 closed

Open