ACERMATE 486 Motherboard Settings and Configuration

Device Type

Mainboard

Processor

80486DX2/AM486DX4/80486DX4/P24T

Processor Speed

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

Chip Set

Unidentified

Video Chip Set

Cirrus Logic

Maximum Onboard Memory

36MB

Maximum Video Memory

2MB

Cache

128/256KB

BIOS

Unidentified

Dimensions

330mm x 218mm

I/O Options

Floppy drive interface, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2), riser slot, VGA port, VGA feature connector

CONNECTIONS

Purpose

Location

Purpose

Location

Chassis fan power

C1

IDE interface 1

CN7

VGA port

CN1

Floppy drive interface

CN8

Parallel port

CN2

VGA feature connector

CN9

Serial port 2

CN3

Daughter board connector

JP44

Serial port 1

CN4

Daughter board connector

JP45

PS/2 mouse port

CN5

Riser slot

SL1

IDE interface 2

CN6

USER CONFIGURABLE SETTINGS

Function

Label

Position

»

Factory configured - do not alter

J1

Unidentified

»

Factory configured - do not alter

J2

Unidentified

»

Factory configured - do not alter

J3

Unidentified

»

Factory configured - do not alter

JP1

Unidentified

Password enabled

JP2

Pins 1 & 2 closed

Password disabled

JP2

Pins 2 & 3 closed

»

Factory configured - do not alter

JP4

Unidentified

On board video enabled

JP14

Closed

On board video disabled

JP14

Open

IDE interface enabled

JP16

Open

IDE interface disabled

JP16

Closed

On board I/O enabled

JP21

Closed

On board I/O disabled

JP21

Open

»

Factory configured - do not alter

JP22

Unidentified

»

Factory configured - do not alter

JP29

Unidentified

Note: The location of JP16 is unidentified.

SIMM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

4MB

4MB

None

None

5MB

4MB

(1) 256K x 36

None

6MB

4MB

(1) 256K x 36

(1) 256K x 36

7MB

4MB

(1) 256K x 36

(1) 512K x 36

8MB

4MB

(1) 1M x 36

None

9MB

4MB

(1) 1M x 36

(1) 256K x 36

SIMM CONFIGURATION (CON'T)

Size

Bank 0

Bank 1

Bank 2

10MB

4MB

(1) 1M x 36

(1) 512K x 36

12MB

4MB

(1) 1M x 36

(1) 1M x 36

16MB

4MB

(1) 1M x 36

(1) 2M x 36

20MB

4MB

(1) 4M x 36

None

21MB

4MB

(1) 4M x 36

(1) 256K x 36

22MB

4MB

(1) 4M x 36

(1) 512K x 36

24MB

4MB

(1) 4M x 36

(1) 1M x 36

28MB

4MB

(1) 4M x 36

(1) 2M x 36

36MB

4MB

(1) 4M x 36

(1) 4M x 36

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

DRAM CONFIGURATION

Setting

JP28

On board memory enabled

Pins 1 & 2 closed

On board memory disabled

Pins 2 & 3 closed

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

128KB

(4) 32K x 8

None

(1) 32K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP24

JP25

JP26

128KB

Open

Closed

Pins 1 & 2 closed

256KB

Closed

Closed

Pins 2 & 3 closed

VIDEO MEMORY CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

512KB

512KB

None

None

1MB

512KB

(4) 256K x 4

None

2MB

512KB

(4) 256K x 4

(2) 256K x 16

CPU SPEED SELECTION

Speed

CN14

JP10

JP17

JP19

25MHz

Pins 4 & 8 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

33MHz

Pins 3 & 7 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

50iMHz

Pins 4 & 8 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

66iMHz

Pins 3 & 7 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

100iMHz

Pins 3 & 7 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

CPU TYPE SELECTION

Type

JP11

JP12

JP13

JP18

JP20

CX486

2 & 3

1 & 2

1 & 2

2 & 3

1 & 2

IBM486

2 & 3

1 & 2

1 & 2

2 & 3

1 & 2

TI486

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

80486SX

1 & 2

1 & 2

1 & 2

2 & 3

2 & 3

AM486DX

1 & 2

1 & 2

1 & 2

2 & 3

2 & 3

80486DX

1 & 2

1 & 2

1 & 2

2 & 3

2 & 3

AM486DX2

1 & 2

1 & 2

1 & 2

2 & 3

2 & 3

80486DX2

1 & 2

1 & 2

1 & 2

2 & 3

2 & 3

80486DX2 (WB)

1 & 2

2 & 3

1 & 2

1 & 2

2 & 3

AM486DX4

1 & 2

1 & 2

1 & 2

2 & 3

2 & 3

80486DX4

1 & 2

1 & 2

1 & 2

2 & 3

2 & 3

80486DX4 (WB)

1 & 2

2 & 3

1 & 2

1 & 2

2 & 3

P24T

1 & 2

2 & 3

1 & 2

1 & 2

2 & 3

Note: Pins designated should be in the closed position.

CPU TYPE SELECTION (CON'T)

Type

JP30

JP31

JP32

JP33

JP34

CX486

Closed

Closed

Closed

2 & 3

Open

IBM486

Closed

Closed

Closed

2 & 3

Open

TI486

Open

Open

Open

1 & 2

Open

80486SX

Open

Open

Open

1 & 2

Closed

AM486DX

Open

Open

Open

1 & 2

Open

80486DX

Open

Open

Open

1 & 2

Closed

AM486DX2

Open

Open

Open

1 & 2

Open

80486DX2

Open

Open

Open

1 & 2

Closed

80486DX2 (WB)

Open

Open

Open

1 & 2

Closed

AM486DX4

Open

Open

Open

1 & 2

Open

80486DX4

Open

Open

Open

1 & 2

Closed

80486DX4 (WB)

Open

Open

Open

1 & 2

Closed

P24T

Open

Open

Open

1 & 2

Closed

Note: Pins designated should be in the closed position.

CPU TYPE SELECTION (CON'T)

Type

JP35

JP36

JP39

JP40

JP41

CX486

Open

Open

1 & 2, 4 & 5

2 & 3

2 & 3

IBM486

Open

Open

1 & 2, 4 & 5

2 & 3

2 & 3

TI486

Open

Open

2 & 3, 5 & 6

2 & 3

2 & 3

80486SX

Closed

Closed

1 & 2, 4 & 5

2 & 3

2 & 3

AM486DX

Open

Open

1 & 2, 4 & 5

1 & 2

1 & 2

80486DX

Closed

Closed

1 & 2, 4 & 5

2 & 3

2 & 3

AM486DX2

Open

Open

1 & 2, 4 & 5

1 & 2

1 & 2

80486DX2

Closed

Closed

1 & 2, 4 & 5

2 & 3

2 & 3

80486DX2 (WB)

Closed

Closed

1 & 2, 4 & 5

2 & 3

2 & 3

AM486DX4

Open

Open

1 & 2, 4 & 5

1 & 2

1 & 2

80486DX4

Closed

Closed

1 & 2, 4 & 5

2 & 3

2 & 3

80486DX4 (WB)

Closed

Closed

1 & 2, 4 & 5

2 & 3

2 & 3

P24T

Closed

Closed

1 & 2, 4 & 5

2 & 3

2 & 3

Note: Pins designated should be in the closed position.

CPU TYPE SELECTION (CON'T)

Type

JP42

JP43

JP46

JP47

JP48

CX486

2 & 3

Open

1 & 2

2 & 3

Open

IBM486

2 & 3

Open

1 & 2

2 & 3

Open

TI486

1 & 2

Open

1 & 2

1 & 2

Open

80486SX

2 & 3

Open

1 & 2

1 & 2

Open

AM486DX

2 & 3

Open

1 & 2

1 & 2

Closed

80486DX

2 & 3

Open

1 & 2

1 & 2

Open

AM486DX2

2 & 3

Open

1 & 2

1 & 2

Closed

80486DX2

2 & 3

Open

1 & 2

1 & 2

Open

80486DX2 (WB)

2 & 3

Open

2 & 3

1 & 2

Open

AM486DX

2 & 3

Open

1 & 2

1 & 2

Open

80486DX4

2 & 3

Open

1 & 2

1 & 2

Open

80486DX4 (WB)

2 & 3

Open

2 & 3

1 & 2

Open

P24T

2 & 3

Open

2 & 3

1 & 2

Open

Note: Pins designated should be in the closed position.

RESET/RESUME SELECTION

Setting

JP37

JP38

Reset button

Pins 1 & 2 closed

Pins 1 & 2 closed

Suspend/reset button

Pins 2 & 3 closed

Pins 2 & 3 closed