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Processor

CX486S/UMCU5S/80486SX/SL80486SX/CX486DX/80486DX/ SL80486DX/AM486DX2/(SL)AM486DX2(WT)/(SL)AM486DX2(WB)/ 80486DX2/SL80486DX2/AM486DX4/(SL)AM486DX4(WB)/ (SL)486DX4(WT)/80486DX4/P24D/P24T/CX5X86

Processor Speed

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

Chip Set

UMC

Video Chip Set

AGI

Maximum Onboard Memory

64MB

Maximum Video Memory

1MB

Cache

None

BIOS

Award

Dimensions

235mm x 186mm

I/O Options

Floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2), VGA port, riser slot, BNC connector, RJ-45 connector

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

BNC connector

CN1

VGA port

CN7

RJ-45 connector

CN2

Floppy drive interface

CN8

Parallel port

CN3

IDE interface

CN9

Serial port 2

CN4

Power LED & keylock

J28

Serial port 1

CN5

Transmit LED

J30

PS/2 mouse port

CN6

Riser slot

SL1

USER CONFIGURABLE SETTINGS

Function

Label

Position

IDE interface enabled

J7

Pins 2 & 3 closed

IDE interface disabled

J7

Pins 1 & 2 closed

Standard DRAM interface enabled

J13

Open

75MHz DRAM clock enabled

J13

Closed

Additional DMCLK for RAS precharge time (for 256K x 16)

J14

Closed

VGA mode select interlaced

J15

Closed

VGA mode select non-interlaced

J15

Open

DRAM CONFIGURATION

Size

Bank 0

Bank 1

1MB

(1) 256K x 36

None

2MB

(1) 256K x 36

(1) 256K x 36

2MB

(1) 512K x 36

None

3MB

(1) 512K x 36

(1) 256K x 36

3MB

(1) 256K x 36

(1) 512K x 36

4MB

(1) 1M x 36

None

4MB

(1) 512K x 36

(1) 512K x 36

5MB

(1) 1M x 36

(1) 256K x 36

5MB

(1) 256K x 36

(1) 1M x 36

6MB

(1) 1M x 36

(1) 512K x 36

8MB

(1) 2M x 36

None

8MB

(1) 1M x 36

(1) 1M x 36

9MB

(1) 256K x 36

(1) 2M x 36

10MB

(1) 2M x 36

(1) 512K x 36

12MB

(1) 2M x 36

(1) 1M x 36

12MB

(1) 1M x 36

(1) 2M x 36

16MB

(1) 2M x 36

(1) 2M x 36

16MB

(1) 4M x 36

None

18MB

(1) 4M x 36

(1) 512K x 36

20MB

(1) 4M x 36

(1) 1M x 36

32MB

(1) 8M x 36

None

32MB

(1) 4M x 36

(1) 4M x 36

64MB

(1) 8M x 36

(1) 8M x 36

VIDEO MEMORY CONFIGURATION

Size

Bank 0

Bank 1

512KB

(1) 256K x 16

None

1MB

(1) 256K x 16

(1) 256K x 16

Note: Bank 0 is factory installed and is not configurable.

CPU SPEED SELECTION

Speed

J10

J11

J12

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 TYPE SELECTION

Type

J17

J18

J19

CX486S

1 & 2, 3 & 4, 5 & 6

2 & 3, 4 & 5

1 & 2, 3 & 4

UMC U5S

2 & 3

1 & 2

2 & 3

80486SX

2 & 3

Open

Open

SL80486SX

2 & 3

5 & 6

Open

CX486DX

1 & 2, 3 & 4, 5 & 6

2 & 3, 4 & 5

1 & 2, 3 & 4

80486DX

2 & 3

Open

Open

SL80486DX

1 & 2

5 & 6

1 & 2

AM486DX2

2 & 3

Open

Open

(SL)AM486DX2 (WB)

1 & 2, 4 & 5

3 & 4, 5 & 6

1 & 2, 4 & 5

(SL)AM486DX2 (WT)

1 & 2

3 & 4, 5 & 6

1 & 2, 4 & 5

80486DX2

2 & 3

Open

Open

SL80486DX2

1 & 2

5 & 6

1 & 2

AM486DX4

2 & 3

Open

Open

(SL)AM486DX4 (WB)

1 & 2, 4 & 5

3 & 4, 5 & 6

1 & 2, 4 & 5

(SL)AM486DX4 (WT)

1 & 2

3 & 4, 5 & 6

1 & 2, 4 & 5

80486DX4

1 & 2

5 & 6

1 & 2

P24D

1 & 2, 4 & 5

3 & 4, 5 & 6

1 & 2, 4 & 5

P24T

1 & 2

5 & 6

1 & 2

CX5X86

1 & 2, 4 & 5

3 & 4, 5 & 6

2 & 3

Note: Pins designated should be in the closed position.

CPU TYPE SELECTION

Type

J20

J22

J23

CX486S

2 & 3, 4 & 5

Open

2 & 3

UMC U5S

Open

3 & 4

2 & 3

80486SX

Open

Open

2 & 3

SL80486SX

1 & 2, 3 & 4

Open

2 & 3

CX486DX

2 & 3

1 & 2

1 & 2, 3 & 4

80486DX

Open

1 & 2

1 & 2, 3 & 4

SL80486DX

1 & 2, 3 & 4

1 & 2

1 & 2, 3 & 4

AM486DX2

Open

1 & 2

1 & 2, 3 & 4

(SL)AM486DX2 (WB)

1 & 2, 3 & 4

1 & 2, 3 & 4

1 & 2, 3 & 4

(SL)AM486DX2 (WT)

1 & 2, 3 & 4

1 & 2, 3 & 4

1 & 2, 3 & 4

80486DX2

Open

1 & 2

1 & 2, 3 & 4

SL80486DX2

1 & 2, 3 & 4

1 & 2

1 & 2, 3 & 4

AM486DX4

Open

1 & 2

1 & 2, 3 & 4

(SL)AM486DX4 (WB)

1 & 2, 3 & 4

1 & 2, 3 & 4

1 & 2, 3 & 4

(SL)AM486DX4 (WT)

1 & 2, 3 & 4

1 & 2, 3 & 4

1 & 2, 3 & 4

80486DX4

1 & 2, 3 & 4

1 & 2

1 & 2, 3 & 4

P24D

1 & 2, 3 & 4

1 & 2

1 & 2, 3 & 4

P24T

1 & 2, 3 & 4

2 & 3

1 & 2, 3 & 4

CX5X86

1 & 2, 3 & 4

1 & 2

1 & 2, 3 & 4

Note: Pins designated should be in the closed position.

CPU MULTIPLIER SELECTION

CPU type

Multiplier

J21

(SL)AM486DX2

2x

Pins 3 & 4 closed

(SL)AM486DX4

2x

Pins 3 & 4 closed

80486DX4

2x

Pins 2 & 3 closed

80486DX4

2.5x

Pins 1 & 2 closed

(SL)AM486DX2

3x

Open

(SL)AM486DX4

3x

Open

80486DX4

3x

Open

All other CPU types

Open

CPU MULTIPLIER SELECTION

CPU type

Multiplier

J24

AM486DX2

2x

Pins 1 & 2 closed

AM486DX4

2x

Pins 1 & 2 closed

AM486DX2

3x

Open

AM486DX4

3x

Open

All other CPU types

Open

CPU VOLTAGE SELECTION

Voltage

JP2

JP3

JP4

J25

J26

J27

3.45v

Closed

Open

Open

1 & 2

1 & 2

1 & 2

3.6v

Open

Closed

Open

1 & 2

1 & 2

1 & 2

4v

Open

Open

Closed

1 & 2

1 & 2

1 & 2

5v

Open

Open

Open

2 & 3

2 & 3

2 & 3

Note: Pins designated should be in the closed position.

BUS SPEED SELECTION

Setting

J16

<= 33MHz

Closed

>33 MHz

Open

DMA CHANNEL SELECTION

Channel

J8

J9

1

Pins 1 & 2 closed

Pins 1 & 2 closed

3

Pins 2 & 3 closed

Pins 2 & 3 closed

ON BOARD VGA SELECTION

Setting

J2

J3

Enabled

Pins 1 & 2 closed

Pins 1 & 2 closed

Disabled

Pins 2 & 3 closed

Pins 2 & 3 closed

MISCELLANEOUS TECHNICAL NOTE

Note: Jumpers not labeled may be reserved for factory use.