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ACERALTOS 300 (M1A), M1A

ACER, INC.

ACERALTOS 300 (M1A), M1A

Device Type

Mainboard

Processor

CX M1/AM K5/Pentium

Processor Speed

75/90/100/120/133MHz

Chip Set

OPTI

Video Chip Set

Unidentified

Maximum Onboard Memory

128MB (EDO supported)

Maximum Video Memory

2MB

Cache

256KB

BIOS

Acer

Dimensions

330mm x 218mm

I/O Options

Ethernet 10BaseT connector, floppy drive interface, green PC connector, IDE interfaces (2), SCSI interface, parallel port, PS/2 mouse port, serial ports (2), VGA feature connector, VGA port, riser slot

CONNECTIONS

Purpose

Location

Purpose

Location

VGA port

C1

SCSI interface

CN10

Parallel port

C2

Power LED & keylock

CN11

Serial port 2

C3

Power LED & keylock

CN12/pins 1 4

Serial port 1

C4

Reset switch

CN12/pins 6 & 7

PS/2 mouse port

C5

IDE interface LED

CN13

Ethernet 10BaseT connector

C6

Speaker

CN14

Chassis fan power

C7

Power LED & keylock

CN15/pins 1 5

Chassis fan power

C8

Speaker

CN15/pins 7 10

AUI interface

CN4

Turbo LED

CN15/pins 12 & 13

VGA feature connector

CN5

Turbo switch

CN15/pins 15 17

Floppy drive interface

CN6

Reset switch

CN15/pins 19 & 20

IDE interface 2

CN7

Riser slot

SL1

IDE interface 1

CN8

   

USER CONFIGURABLE SETTINGS

Function

Label

Position

Factory configured - do not alter

CN16

Unidentified

BIOS type select Acer

JP1

Pins 1 & 2 closed

 

BIOS type select OEM

JP1

Pins 2 & 3 closed

Password disabled

JP2

Pins 2 & 3 closed

 

Password enabled

JP2

Pins 1 & 2 closed

SIMM CONFIGURATION

Size

Bank 0

Bank 1

8MB

(2) 1M x 36

None

16MB

(2) 2M x 36

None

16MB

(2) 1M x 36

(2) 1M x 36

24MB

(2) 2M x 36

(2) 1M x 36

32MB

(2) 4M x 36

None

32MB

(2) 2M x 36

(2) 2M x 36

40MB

(2) 4M x 36

(2) 1M x 36

48MB

(2) 4M x 36

(2) 2M x 36

64MB

(2) 8M x 36

None

64MB

(2) 4M x 36

(2) 4M x 36

72MB

(2) 8M x 36

(2) 1M x 36

80MB

(2) 8M x 36

(2) 2M x 36

96MB

(2) 8M x 36

(2) 4M x 36

128MB

(2) 8M x 36

(2) 8M x 36

Note: Board accepts EDO memory.

SIMM JUMPER CONFIGURATION

Type

JP9

JP14

Normal

Pins 1 & 2 closed

Pins 1 & 2 closed

 

EDO

Pins 2 & 3 closed

Pins 2 & 3 closed

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

256KB

None

(8) 32K x 8

(1) 8K x 8

256KB

(2) 32K x 32

None

(1) 32K x 8

VIDEO MEMORY CONFIGURATION

Size

Bank 0

Bank 1

1MB

(2) 256K x 16

None

2MB

(2) 256K x 16

(2) 256K x 16

CPU SPEED SELECTION (CX M1)

CPU speed

Clock speed

Multiplier

JP5

JP8

JX1

120MHz

60MHz

2x

1 & 2

2 & 3

1 & 2

133MHz

66MHz

2x

2 & 3

2 & 3

1 & 2

Note: Pins designated should be in the closed position.

CPU SPEED SELECTION (AM K5)

CPU speed

Clock speed

Multiplier

JP5

JP8

JX1

75MHz

50MHz

1.5x

Open

1 & 2

1 & 2

90MHz

60MHz

1.5x

1 & 2

1 & 2

1 & 2

100MHz

66MHz

1.5x

2 & 3

1 & 2

1 & 2

Note: Pins designated should be in the closed position.

CPU SPEED SELECTION (INTEL)

CPU speed

Clock speed

Multiplier

JP5

JP8

JX1

75MHz

50MHz

1.5x

Open

1 & 2

1 & 2

90MHz

60MHz

1.5x

1 & 2

1 & 2

1 & 2

100MHz

66MHz

1.5x

2 & 3

1 & 2

1 & 2

120MHz

60MHz

2x

1 & 2

2 & 3

1 & 2

133MHz

66MHz

2x

2 & 3

2 & 3

1 & 2

Note: Pins designated should be in the closed position.

CPU TYPE SELECTION

Type

JP10

JP11

JP12

JP13

AM K5

Closed

Closed

Open

Closed

CX M1

Open

Open

Open

Open

Intel

Closed

Closed

Closed

Closed

CPU VOLTAGE SELECTION

Voltage

JP7

VR

Pins 1 & 2 closed

VRE

Pins 2 & 3 closed