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Processor

CX486M6/UMC486/80486SX/CX486M7/AM486DX/SL80486DX/80486DX/ AM486DX2/AM486DXL/SL80486DX2/80486DX2/80486DX4/P24D/Pentium Overdrive

Processor Speed

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

Chip Set

Unidentified

Max. Onboard DRAM

64MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

254mm x 218mm

I/O Options

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

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

JP8

Turbo switch

JP15 (pins 14 - 16)

Speaker

JP15 (pins 1 - 4)

+5v ground

JP15 (pins 17 - 18)

Power LED & keylock

JP15 (pins 5 - 9)

Green PC connector

JP24

Turbo LED

JP15 (pins 10 - 11)

Green PC connector

JP25

Reset switch

JP15 (pins 12 - 13)

32-bit VESA local bus slots

SL1 - SL3

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

�

CMOS memory normal operation

JP8

pins 2 & 3 closed

CMOS memory clear

JP8

pins 3 & 4 closed

Battery type select external

JP8

Closed

�

Factory configured - do not alter

JP31

Open

�

Factory configured - do not alter

JP32

Open

�

VESA bus clock type select synchronous

JP36

pins 1 & 2 closed

VESA bus clock type select asynchronous

JP36

pins 2 & 3 closed

DRAM CONFIGURATION

Size

Bank 0/2

Bank 1/3

Bank 2

1MB

(1) 256K x 36

NONE

NONE

1MB

NONE

(1) 256K x 36

NONE

1MB

NONE

NONE

(4) 256K x 9

2MB

(1) 256K x 36

NONE

(4) 256K x 9

2MB

NONE

(1) 256K x 36

(4) 256K x 9

2MB

(1) 256K x 36

(1) 256K x 36

NONE

2MB

(1) 512K x 36

NONE

NONE

2MB

NONE

(1) 512K x 36

NONE

3MB

(1) 256K x 36

(1) 256K x 36

(4) 256K x 9

3MB

NONE

(1) 512K x 36

(4) 256K x 9

3MB

(1) 256K x 36

(1) 512K x 36

(4) 256K x 9

3MB

(1) 512K x 36

(1) 256K x 36

NONE

4MB

(1) 256K x 36

(1) 512K x 36

(4) 256K x 9

4MB

NONE

NONE

(4) 1M x 9

4MB

(1) 512K x 36

(1) 512K x 36

NONE

4MB

(1) 1M x 36

NONE

NONE

4MB

NONE

(1) 1M x 36

NONE

5MB

(1) 1M x 36

NONE

(4) 256K x 9

5MB

NONE

(1) 1M x 36

(4) 256K x 9

5MB

(1) 256K x 36

NONE

(4) 1M x 9

5MB

NONE

(1) 256K x 36

(4) 1M x 9

5MB

(1) 256K x 36

(1) 1M x 36

NONE

5MB

(1) 1M x 36

(1) 256K x 36

NONE

6MB

NONE

(1) 512K x 36

(4) 1M x 9

6MB

(1) 1M x 36

(1) 512K x 36

NONE

6MB

(1) 512K x 36

(1) 1M x 36

NONE

7MB

(1) 1M x 36

(1) 512K x 36

(4) 256K x 9

7MB

(1) 256K x 36

(1) 512K x 36

(4) 1M x 9

8MB

(1) 1M x 36

NONE

(4) 1M x 9

8MB

NONE

(1) 1M x 36

(4) 1M x 9

8MB

(1) 1M x 36

(1) 1M x 36

NONE

8MB

(1) 2M x 36

NONE

NONE

8MB

NONE

(1) 2M x 36

NONE

9MB

(1) 1M x 36

(1) 1M x 36

(4) 256K 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 (A)

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

256KB (B)

(4) 64K x 8

NONE

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP7

JP9

JP10

JP33

64KB

Open

Open

pins 2 & 3 closed

Open

128KB

Open

pins 1 & 2 closed

pins 1 & 2 closed

Closed

256KB (A)

Closed

pins 2 & 3 closed

pins 2 & 3 closed

Closed

256KB (B)

Closed

pins 1 & 2, 3 & 4 closed

pins 1 & 2 closed

Closed

CPU TYPE CONFIGURATION

Type

JP11

JP12

JP13

CX486M6

1 & 2, 3 & 4, 5 & 6

1 & 2, 3 & 4, 5 & 6

2 & 3

UMC486

2 & 3

2 & 3

2 & 3

80486SX

Open

2 & 3

2 & 3

CX486M7

1 & 2, 3 & 4, 5 & 6

1 & 2, 3 & 4, 5 & 6

1 & 2, 3 & 4

AMD486DXL

2 & 3

2 & 3

1 & 2, 3 & 4

SL80486DX

1 & 2

1 & 2

1 & 2, 3 & 4

SL80486DX2

1 & 2

1 & 2

1 & 2, 3 & 4

80486DX

Open

2 & 3

1 & 2, 3 & 4

80486DX2

Open

2 & 3

1 & 2, 3 & 4

80486DX4

1 & 2

1 & 2

1 & 2, 3 & 4

P24D

1 & 2, 4 & 5

1 & 2, 4 & 5

1 & 2, 3 & 4

Pentium Overdrive

1 & 2

1 & 2

1 & 2, 3 & 4

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CON�T)

Type

JP17

JP18

JP19

JP35

CX486M6

Open

2 & 3, 4 & 5

2 & 3, 4 & 5

Open

UMC486

3 & 4

1 & 2

Open

Closed

80486SX

Open

Open

Open

Closed

CX486M7

1 & 2

2 & 3, 4 & 5

2 & 3

Open

AMD486DXL

1 & 2, 3 & 4

1 & 2

Open

Closed

SL80486DX

1 & 2

5 & 6

1 & 2, 3 & 4

Open

SL80486DX2

1 & 2

5 & 6

1 & 2, 3 & 4

Open

80486DX

1 & 2

Open

Open

Closed

80486DX2

1 & 2

Open

Open

Closed

80486DX4

1 & 2

5 & 6

1 & 2, 3 & 4

Open

P24D

1 & 2

3 & 4, 5 & 6

1 & 2, 3 & 4

Open

Pentium Overdrive

2 & 3

5 & 6

1 & 2, 3 & 4

Open

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

JP20

JP23

All CPU

Open

Open

AM80486DX2-66/80 only

Closed

Closed

CPU SPEED CONFIGURATION

Speed

JP4

JP5

JP6

25MHz

Open

Open

Closed

33MHz

Closed

Closed

Closed

40MHz

Open

Closed

Closed

50iMHz

Open

Open

Closed

50MHz

Closed

Open

Open

66iMHz

Closed

Closed

Closed

75iMHz

Open

Open

Closed

100iMHz

Closed

Closed

Closed

CPU VOLTAGE CONFIGURATION

Voltage

JP14

JP16

JP27

3.45v

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

5v

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

VESA WAIT STATE CONFIGURATION

Wait states

JP22

0 wait states

Open

1 wait state

Closed

BUS SPEED CONFIGURATION

CPU speed

JP21

<= 33MHz

Open

> 33MHz

Closed