Processor

80386DX/CX486DLC/80486SX/80487SX/80486DX/ODP486SX/80486DX2

Processor Speed

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

Chip Set

OPTI

Max. Onboard DRAM

32MB

SRAM Cache

64/128/256KB

BIOS

MR

Dimensions

235mm x 220mm

I/O Options

VESA local bus slots (3)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J1

Turbo LED

JP32

Power LED & keylock

J19

Reset switch

RST

Speaker

J20

32-bit VESA Local bus slots (Slave)

S2 & S3

Turbo switch

JP31

32-bit VESA Local bus slots (Master)

S2 & S3

Note:VESA Local bus slot S1 should only be used for a VGA video card.

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

CMOS memory normal operation

JP1

pins 2 & 3 closed

CMOS memory clear

JP1

pins 1 & 2 closed

»

Factory configured - do not alter

JP2

open

Bus clock speed select iOSC/4

JP3

closed

Bus clock speed select iOSC/5

JP3

open

»

Monitor type select color

JP4

closed

Monitor type select monochrome

JP4

open

»

Factory configured - do not alter

JP16

open

80486 PQFP enabled

JP17

open

80486 PQFP disabled

JP17

closed

80386 PQFP enabled

JP18

open

80386 PQFP disabled

JP18

closed

»

VESA bus speed select <=33MHz

JP22

open

VESA bus speed select > 33MHz

JP22

closed

»

VESA bus wait states select 0 (CPU <=33MHz)

JP26

open

VESA bus wait state select 1 (CPU > 33MHz)

JP26

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

20MB

(4) 1M x 9

(4) 4M x 9

32MB

(4) 4M x 9

(4) 4M x 9

SRAM CONFIGURATION

Size

Cache

Location

TAG(U39)

TAG(U40)

64KB

(8) 8K x 8

Banks 0 & 1

(1) 8K x 8

NONE

128KB

(4) 32K x 8

Bank 0

(1) 8K x 8

NONE

256KB

(8) 32K x 8

Banks 0 & 1

(1) 32K x 8

NONE

256KB

(8) 32K x 8

Banks 0 & 1

(1) 8K x 8

(1) 8K x 8

SRAM JUMPER CONFIGURATION

Size

JP10

JP11

JP13

JP15

64KB

pins 2 & 3 closed

open

open

open

128KB

pins 1 & 2 closed

closed

closed

open

256KB

pins 2 & 3 closed

closed

closed

closed

CPU CONFIGURATION

CPU

JP5

JP6

JP7

JP12

JP30

JP34

JP35

JP36

JP37

80386DX

2&3

open

open

open

closed

open

N/A

N/A

N/A

CX486DLC

2&3

closed

closed

open

closed

open

N/A

N/A

N/A

80486SX

1&2

open

open

closed

open

closed

open

open

2&3

80487SX

1&2

open

open

closed

open

closed

2&3

closed

1&2

80486DX

1&2

open

open

closed

open

closed

1&2

closed

1&2

ODP487SX

1&2

open

open

closed

open

closed

2&3

closed

1&2

80486DX2

1&2

open

open

closed

open

closed

1&2

closed

1&2

Note:Pins designated should be in the closed position.

CLOCK SPEED SELECT

Speed

JP25

JP28

JP29

JP33

25MHz

pins 1 & 2 closed

closed

open

pins 1 & 2 closed

33MHz(386/486DLC)

pins 2 & 3 closed

closed

open

pins 1 & 2 closed

33MHz(486)

pins 1 & 2 closed

open

closed

pins 1 & 2 closed

40MHz(486)

pins 1 & 2 closed

open

open

pins 1 & 2 closed

40MHz(386/486DLC)

pins 2 & 3 closed

open

closed

pins 1 & 2 closed

50iMHz

pins 2 & 3 closed

closed

open

pins 2 & 3 closed

50MHz

pins 1 & 2 closed

closed

open

pins 1 & 2 closed

66iMHz

pins 2 & 3 closed

open

closed

pins 2 & 3 closed

VESA SLOT (S2 &AMP; S3) MASTER/SLAVE CONFIGURATION

Jumper

Master/Slave

Slave only

JP8

open

closed

JP9

open

closed

JP14

open

closed

JP19

open

closed

JP21

open

closed

JP23

pins 1 & 2 closed

pins 2 & 3 closed

JP24

open

closed

JP27

pins 1 & 2 closed

pins 2 & 3 closed

U29 (PAL socket)

Installed

N/A

U38 (PAL socket)

Installed

N/A

When the Slave only setting is used non-Bus-master cards can be used.