...because we can't all be on the bleeding edge...





AN4R2/AN4TR2 REV. 1.1 & REV. 1.2

ABIT COMPUTER CORPORATION

AN4R2/AN4TR2 REV. 1.1 & REV. 1.2

Processor

SL80486SX/80486SX/CX486DX/SL80486DX/80486DX/CX486DX2/AM486DX2/SL80486DX2/80486DX2/80486DX4

Processor Speed

20/25/33/40/50(internal)/66(internal)/75(internal)/83(internal)/100(internal)MHz

Chip Set

Unidentified

Max. Onboard DRAM

128MB

Cache

128/256/512KB

BIOS

AMI/Award

Dimensions

330mm 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

JP25

Reset switch

JW3

Green PC connector (monitor)

JP46 pins 1 - 3

Turbo switch

JW4

Green PC connector

JP46 pins 7 & 8

Turbo LED

JW5

Power LED & keylock

JW1

32-bit VESA local bus slots

SL1 - SL3

Speaker

JW2

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Ľ

Factory configured - do not alter

JP3

pins 2 & 3 closed

Ľ

Factory configured - do not alter

JP4

pins 1 & 2 closed

Ľ

Factory configured - do not alter

JP6

N/A

Ľ

Factory configured - do not alter

JP13

Closed

Ľ

Factory configured - do not alter

JP14

pins 1 & 2 closed

Ľ

Factory configured - do not alter

JP15

Open

Ľ

Factory configured - do not alter

JP16

Closed

Ľ

CMOS memory normal operation

JP21

pins 1 & 2 closed

 

CMOS memory clear

JP21

pins 2 & 3 closed

Ľ

Factory configured - do not alter

JP41

Open

Ľ

Factory configured - do not alter

JP49

pins 1 & 2 closed

Ľ

Factory configured - do not alter

JP52

N/A

Ľ

Factory configured - do not alter

JP60

N/A

Ľ

Factory configured - do not alter

JP62

N/A

DRAM CONFIGURATION

Size

SIMM 1 - 4

SIMM 5 - 8

SIMM 9

SIMM 10

1MB

NONE

NONE

(1) 256K x 36

NONE

1MB

(4) 256K x 9

NONE

NONE

NONE

1MB

(4) 256K x 9

NONE

NONE

NONE

2MB

NONE

NONE

(1) 256K x 36

(1) 256K x 36

2MB

(4) 256K x 9

NONE

NONE

(1) 256K x 36

2MB

NONE

NONE

(1) 512K x 36

NONE

2MB

(4) 256K x 9

(4) 256K x 9

NONE

NONE

4MB

NONE

NONE

(1) 1M x 36

NONE

4MB

(4) 1M x 9

NONE

NONE

NONE

4MB

NONE

NONE

(1) 512K x 36

(1) 512K x 36

4MB

(4) 256K x 9

NONE

(1) 512K x 36

(1) 256K x 36

4MB

(4) 256K x 9

(4) 256K x 9

(1) 512K x 36

NONE

5MB

NONE

NONE

(1) 256K x 36

(1) 1M x 36

5MB

(4) 256K x 9

NONE

NONE

(1) 1M x 36

6MB

(4) 1M x 9

NONE

(1) 256K x 36

(1) 256K x 36

6MB

(4) 256K x 9

NONE

(1) 1M x 36

(1) 256K x 36

6MB

NONE

NONE

(1) 512K x 36

(1) 1M x 36

6MB

(4) 256K x 9

(4) 256K x 9

(1) 1M x 36

NONE

8MB

NONE

NONE

(1) 1M x 36

(1) 1M x 36

8MB

(4) 1M x 9

NONE

NONE

(1) 1M x 36

8MB

NONE

NONE

(1) 2M x 36

NONE

8MB

(4) 1M x 9

NONE

(1) 512K x 36

(1) 512K x 36

8MB

(4) 1M x 9

(4) 1M x 9

NONE

NONE

10MB

(4) 1M x 9

(4) 1M x 9

(1) 256K x 36

(1) 256K x 36

10MB

(4) 256K x 9

(4) 256K x 9

(1) 1M x 36

(1) 1M x 36

12MB

(4) 1M x 9

NONE

(1) 1M x 36

(1) 1M x 36

DRAM CONFIGURATION (CONíT)

Size

SIMM 1 - 4

SIMM 5 - 8

SIMM 9

SIMM 10

12MB

(4) 1M x 9

NONE

(1) 1M x 36

(1) 1M x 36

12MB

(4) 1M x 9

(4) 1M x 9

(1) 512K x 36

(1) 512K x 36

12MB

(4) 1M x 9

(4) 1M x 9

(1) 1M x 36

NONE

16MB

(4) 1M x 9

(4) 1M x 9

(1) 1M x 36

(1) 1M x 36

16MB

NONE

NONE

(1) 4M x 36

NONE

16MB

(4) 4M x 9

NONE

NONE

NONE

16MB

NONE

NONE

(1) 2M x 36

(1) 2M x 36

16MB

(4) 1M x 9

(4) 1M x 9

(1) 1M x 36

(1) 1M x 36

16MB

(4) 4M x 9

NONE

NONE

NONE

17MB

NONE

NONE

(1) 256K x 36

(1) 4M x 36

17MB

(4) 256K x 9

NONE

NONE

(1) 4M x 36

18MB

(4) 4M x 9

NONE

(1) 256K x 36

(1) 256K x 36

18MB

(4) 256K x 9

NONE

(1) 4M x 36

(1) 256K x 36

18MB

NONE

NONE

(1) 512K x 36

(1) 4M x 36

18MB

(4) 256K x 9

(4) 256K x 9

(1) 4M x 36

NONE

20MB

NONE

NONE

(1) 1M x 36

(1) 4M x 36

20MB

(4) 1M x 9

NONE

NONE

(1) 4M x 36

20MB

(4) 4M x 9

NONE

(1) 512K x 36

(1) 512K x 36

24MB

(4) 4M x 9

NONE

(1) 1M x 36

(1) 1M x 36

24MB

(4) 1M x 9

NONE

(1) 4M x 36

(1) 1M x 36

24MB

(4) 1M x 9

(4) 4M x 9

(1) 512K x 36

(1) 512K x 36

24MB

(4) 1M x 9

(4) 1M x 9

(1) 4M x 36

NONE

32MB

NONE

NONE

(1) 4M x 36

(1) 4M x 36

32MB

(4) 4M x 9

NONE

NONE

(1) 4M x 36

32MB

NONE

NONE

(1) 8M x 36

NONE

32MB

(4) 4M x 9

(4) 4M x 9

NONE

NONE

36MB

(4) 4M x 9

NONE

(1) 1M x 36

(1) 4M x 36

36MB

(4) 1M x 9

NONE

(1) 4M x 36

(1) 4M x 36

36MB

(4) 4M x 9

(4) 4M x 9

(1) 512K x 36

(1) 512K x 36

36MB

(4) 1M x 9

NONE

(1) 8M x 36

NONE

36MB

(4) 1M x 9

(4) 4M x 9

(1) 4M x 36

NONE

40MB

(4) 4M x 9

(4) 4M x 9

(1) 1M x 36

(1) 1M x 36

40MB

(4) 1M x 9

NONE

(1) 8M x 36

(1) 1M x 36

40MB

(4) 1M x 9

(4) 1M x 9

(1) 8M x 36

NONE

40MB

(4) 1M x 9

(4) 1M x 9

(1) 4M x 36

(1) 4M x 36

48MB

(4) 4M x 9

NONE

(1) 4M x 36

(1) 4M x 36

48MB

(4) 4M x 9

NONE

(1) 4M x 36

(1) 4M x 36

48MB

(4) 4M x 9

NONE

(1) 8M x 36

NONE

48MB

(4) 4M x 9

(4) 4M x 9

(1) 4M x 36

NONE

64MB

(4) 4M x 9

(4) 4M x 9

(1) 4M x 36

(1) 4M x 36

64MB

NONE

NONE

(1) 16M x 36

NONE

64MB

(4) 16M x 9

NONE

NONE

NONE

64MB

NONE

NONE

(1) 8M x 36

(1) 8M x 36

64MB

(4) 4M x 9

NONE

(1) 8M x 36

(1) 4M x 36

DRAM CONFIGURATION (CONíT)

Size

SIMM 1 - 4

SIMM 5 - 8

SIMM 9

SIMM 10

64MB

(4) 4M x 9

(4) 4M x 9

(1) 8M x 36

NONE

64MB

(4) 4M x 9

(4) 4M x 9

(1) 4M x 36

(1) 4M x 36

64MB

(4) 16M x 9

NONE

NONE

NONE

65MB

NONE

NONE

(1) 256K x 36

(1) 16M x 36

65MB

(4) 256K x 9

NONE

NONE

(1) 16M x 36

68MB

NONE

NONE

(1) 1M x 36

(1) 16M x 36

68MB

(4) 1M x 9

NONE

NONE

(1) 16M x 36

68MB

(4) 1M x 9

(4) 16M x 9

NONE

NONE

72MB

(4) 16M x 9

NONE

(1) 1M x 36

(1) 1M x 36

72MB

(4) 1M x 9

NONE

(1) 16M x 36

(1) 1M x 36

72MB

(4) 1M x 9

(4) 1M x 9

(1) 16M x 36

NONE

80MB

NONE

NONE

(1) 4M x 36

(1) 16M x 36

80MB

(4) 4M x 9

NONE

NONE

(1) 16M x 36

80MB

(4) 4M x 9

(4) 16M x 9

NONE

NONE

96MB

(4) 16M x 9

NONE

(1) 4M x 36

(1) 4M x 36

96MB

(4) 4M x 9

NONE

(1) 16M x 36

(1) 4M x 36

96MB

(4) 4M x 9

(4) 4M x 9

(1) 16M x 36

NONE

128MB

NONE

NONE

(1) 16M x 36

(1) 16M x 36

128MB

(4) 16M x 9

NONE

NONE

(1) 16M x 36

128MB

(4) 16M x 9

(4) 16M x 9

NONE

NONE

DRAM JUMPER CONFIGURATION

Bank 0

Bank 1

Bank 2

Bank 3

JP18

JP19

JP20

JP22

SIMM 1 - 4

SIMM 5 - 8

SIMM 9

SIMM 10

1 & 2

1 & 2

Open

1 & 2

SIMM 1 - 4

SIMM 5 - 8

SIMM 9

NONE

1 & 2

1 & 2

Open

1 & 2

SIMM 1 - 4

SIMM 9

NONE

NONE

1 & 2

Open

Open

1 & 2

SIMM 1 - 4

SIMM 10

SIMM 9

NONE

1 & 2

Open

Open

1 & 2

SIMM 9

SIMM 10

SIMM 1 - 4

SIMM 5 - 8

2 & 3

2 & 3

Open

2 & 3

SIMM 9

SIMM 10

NONE

NONE

Open

Open

Closed

2 & 3

SIMM 1 - 4

SIMM 10

SIMM 9

NONE

1 & 2

Open

Open

1 & 2

SIMM 9

SIMM 10

SIMM 1 - 4

SIMM 5 - 8

2 & 3

2 & 3

Open

2 & 3

Note: Pins designated should be in the closed position.

DRAM JUMPER CONFIGURATION (CONíT)

Bank 0

Bank 1

Bank 2

Bank 3

JP23

JP24

JP50

JP51

SIMM 1 - 4

SIMM 5 - 8

SIMM 9

SIMM 10

Open

1 & 2

Open

Open

SIMM 1 - 4

SIMM 5 - 8

SIMM 9

NONE

1 & 2

Open

Open

Open

SIMM 1 - 4

SIMM 9

NONE

NONE

2 & 3

Open

Open

Open

SIMM 1 - 4

SIMM 10

SIMM 9

NONE

1 & 2

2 & 3

Open

Open

SIMM 9

SIMM 10

SIMM 1 - 4

SIMM 5 - 8

Open

2 & 3

Closed

2 & 3

SIMM 9

SIMM 10

NONE

NONE

2 & 3

Open

Open

1 & 2

SIMM 1 - 4

SIMM 10

SIMM 9

NONE

1 & 2

2 & 3

Open

Open

SIMM 9

SIMM 10

SIMM 1 - 4

SIMM 5 - 8

Open

2 & 3

Open

Open

Note: Pins designated should be in the closed position.

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

128KB

(4) 32K x 8

NONE

(1) 8K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

256KB

(4) 64K x 8

NONE

(1) 32K x 8

512KB

(4) 128K x 8

NONE

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP1

JP2

JP42

JP44

128KB

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

256KB

pins 2 & 3 closed

pins 2 & 3 closed

pins 1 & 2 closed

pins 2 & 3 closed

256KB

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 3 closed

512KB

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 3 closed

pins 2 & 3 closed

CPU TYPE CONFIGURATION

Type

JP9

JP12

JP30

JP31

JP33

SL80486SX

2 & 3

2 & 3

2 & 3

Open

Open

80486SX

2 & 3

2 & 3

2 & 3

Open

Open

CX486DX

2 & 3

2 & 3

1 & 2

3 & 4

Closed

SL80486DX

2 & 3

2 & 3

1 & 2

3 & 4

Closed

80486DX

2 & 3

2 & 3

1 & 2

3 & 4

Closed

CX486DX2

1 & 2

1 & 2

1 & 2

3 & 4

Closed

AM486DX2

1 & 2

1 & 2

1 & 2

3 & 4

Closed

SL80486DX2

2 & 3

2 & 3

1 & 2

3 & 4

Closed

80486DX2

2 & 3

2 & 3

1 & 2

3 & 4

Closed

80486DX4

1 & 2

1 & 2

1 & 2

3 & 4

Closed

Note: Pins designated should be in the closed position. The 80486DX4 CPU is only available on the AN4TR2 mainboard.

CPU TYPE CONFIGURATION (CONíT)

Type

JP34

JP35

JP36

JP38

SL80486SX

4 & 5

3 & 4

2 & 3

Open

80486SX

4 & 5

3 & 4

2 & 3

Open

CX486DX

2 & 3

2 & 3

1 & 2, 3 & 4

2 & 3

SL80486DX

4 & 5

3 & 4

2 & 3

Open

80486DX

4 & 5

3 & 4

2 & 3

Open

CX486DX2

2 & 3

2 & 3

1 & 2

2 & 3

AM486DX2

4 & 5

3 & 4

2 & 3

Open

SL80486DX2

4 & 5

3 & 4

2 & 3

Open

80486DX2

4 & 5

3 & 4

2 & 3

Open

80486DX4

4 & 5

3 & 4

2 & 3

Open

Note: Pins designated should be in the closed position. The 80486DX4 CPU is only available on the AN4TR2 mainboard.

CPU TYPE CONFIGURATION (CONíT)

Type

JP39

JP43

JP47

JP48

JP63

SL80486SX

Open

2 & 3

2 & 3

1 & 2

Open

80486SX

Open

2 & 3

2 & 3

1 & 2

Open

CX486DX

2 & 3

1 & 2

1 & 2

2 & 3

Open

SL80486DX

Open

2 & 3

2 & 3

1 & 2

Open

80486DX

Open

2 & 3

2 & 3

1 & 2

Open

CX486DX2

2 & 3

1 & 2

1 & 2

2 & 3

Open

AM486DX2

Open

2 & 3

2 & 3

1 & 2

1 & 2

SL80486DX2

Open

2 & 3

2 & 3

1 & 2

Open

80486DX2

Open

2 & 3

2 & 3

1 & 2

Open

80486DX4

Open

2 & 3

2 & 3

1 & 2

Open

Note: Pins designated should be in the closed position. The 80486DX4 CPU is only available on the AN4TR2 mainboard.

CPU SPEED CONFIGURATION (AVASEM AV9107)

Speed

JP8

JP10

JP11

JP26

JP27

JP28

JP29

20MHz

2 & 3

Open

Open

Closed

Open

1 & 2

Closed

25MHz

2 & 3

Open

Open

Open

Closed

1 & 2

Closed

33MHz

2 & 3

Open

Open

Closed

Closed

1 & 2

Open

40MHz

2 & 3

Open

Open

Open

Open

1 & 2

Closed

50iMHz

2 & 3

Open

Open

Open

Closed

1 & 2

Closed

66iMHz

2 & 3

Open

Open

Closed

Closed

1 & 2

Open

75iMHz

2 & 3

Open

1 & 2

Open

Closed

Open

Closed

83iMHz

2 & 3

Closed

Open

Closed

Closed

Open

Open

100iMHz

2 & 3

Open

1 & 2

Closed

Closed

Open

Open

Note: Pins designated should be in the closed position.

CPU SPEED CONFIGURATION (MX8315)

Speed

JP8

JP10

JP11

JP26

JP27

JP28

JP29

20MHz

1 & 2

Open

Open

Open

Open

1 & 2

Open

25MHz

1 & 2

Open

Open

Open

Closed

1 & 2

Open

33MHz

1 & 2

Open

Open

Closed

Closed

1 & 2

Closed

40MHz

1 & 2

Open

Open

Closed

Closed

1 & 2

Open

50iMHz

1 & 2

Open

Open

Open

Closed

1 & 2

Open

66iMHz

1 & 2

Open

Open

Closed

Closed

1 & 2

Closed

75iMHz

1 & 2

Open

1 & 2

Open

Closed

Open

Closed

83iMHz

1 & 2

Closed

Open

Closed

Closed

Open

Closed

100iMHz

1 & 2

Open

1 & 2

Closed

Closed

Open

Closed

Note: Pins designated should be in the closed position.

CPU VOLTAGE CONFIGURATION

Voltage

JP53

JP54

JP55

JP56

3.3v

pins 1 & 2 closed

Open

Open

Open

3.45v

Open

pins 1 & 2 closed

Open

Open

3.6v

Open

Open

pins 1 & 2 closed

Open

4v

Open

Open

Open

pins 1 & 2 closed

BUS SPEED CONFIGURATION

CPU speed

JP7

<= 33MHz

pins 1 & 2 closed

> 33MHz

pins 2 & 3 closed