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MB520ND

VTECH INDUSTRIES, INC.

MB520ND

Processor

CX M1/AM K5/Pentium

Processor Speed

75/90/100/120/133/150/166/180/200MHz

Chip Set

Unidentified

Video Chip Set

None

Maximum Onboard Memory

128MB (EDO supported)

Maximum Video Memory

None

Cache

256/512KB

BIOS

Award

Dimensions

254mm x 218mm

I/O Options

32-bit PCI slots (4), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse interface, serial ports (2), cache slot, IR connector, USB connector

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Floppy drive interface

CN1

IR connector

J10

IDE interface 1

CN2

Speaker

J11

IDE interface 2

CN3

Reset switch

J19

USB connector

J1

IDE interface LED

JP14

PS/2 mouse interface

J2

Green PC connector

JP15

Power LED & keylock

J3

Chassis fan power

JP18

Serial port 1

J6

32-bit PCI slots

PC1 PC4

Serial port 2

J7

Cache slot

SL1

Parallel port

J9

   

USER CONFIGURABLE SETTINGS

Function

Label

Position

 

Flash BIOS type select SST/Winbond/ATMEL/MX

JP9

Pins 1 & 2 closed

 

Flash BIOS type select Intel

JP9

Pins 2 & 3 closed

 

Flash BIOS voltage select 12v

JP10

Pins 2 & 3 closed

 

Flash BIOS voltage select 5v

JP10

Pins 1 & 2 closed

CMOS memory normal operation

JP16

Open

 

CMOS memory clear

JP16

Closed

DRAM 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. Banks are interchangeable.

DIMM CONFIGURATION

Size

Bank 0

Bank 1

8MB

(1) 1M x 64

None

16MB

(1) 2M x 64

None

16MB

(1) 1M x 64

(1) 1M x 64

24MB

(1) 2M x 64

(1) 1M x 64

32MB

(1) 4M x 64

None

32MB

(1) 2M x 64

(1) 2M x 64

40MB

(1) 4M x 64

(1) 1M x 64

48MB

(1) 4M x 64

(1) 2M x 64

64MB

(1) 4M x 64

(1) 4M x 64

Note: Banks are interchangeable.

CACHE CONFIGURATION

Size

Bank 0

SL1

256KB

None

256KB module installed

256KB

(2) 32K x 32

Not installed

512KB

(2) 32K x 32

256KB module installed

512KB

(2) 64K x 32

Not installed

512KB

None

512KB module installed

CPU SPEED SELECTION (AMD)

CPU speed

Clock speed

Multiplier

JP2

JP3

JP6

JP7

75MHz

50MHz

1.5x

1 & 2

1 & 2

2 & 3

2 & 3

90MHz

60MHz

1.5x

1 & 2

1 & 2

1 & 2

2 & 3

100MHz

66MHz

1.5x

1 & 2

1 & 2

1 & 2

1 & 2

120MHz

60MHz

1.5x

1 & 2

1 & 2

1 & 2

2 & 3

133MHz

66MHz

1.5x

1 & 2

1 & 2

1 & 2

1 & 2

150MHz

60MHz

2x

1 & 2

2 & 3

1 & 2

2 & 3

166MHz

66MHz

2x

1 & 2

2 & 3

1 & 2

1 & 2

Note: Pins designated should be in the closed position.

CPU SPEED SELECTION (CYRIX)

CPU speed

Clock speed

Multiplier

JP2

JP3

JP6

JP7

120MHz

50MHz

2x

1 & 2

2 & 3

2 & 3

2 & 3

133MHz

55MHz

2x

1 & 2

2 & 3

2 & 3

1 & 2

150MHz

60MHz

2x

1 & 2

2 & 3

1 & 2

2 & 3

166MHz

66MHz

2x

1 & 2

2 & 3

1 & 2

1 & 2

200MHz

50MHz

1.5x

1 & 2

1 & 2

2 & 3

2 & 3

Note: Pins designated should be in the closed position.

CPU SPEED SELECTION (INTEL)

CPU speed

Clock speed

Multiplier

JP2

JP3

JP6

JP7

75MHz

50MHz

1.5x

1 & 2

1 & 2

2 & 3

2 & 3

90MHz

60MHz

1.5x

1 & 2

1 & 2

1 & 2

2 & 3

100MHz

66MHz

1.5x

1 & 2

1 & 2

1 & 2

1 & 2

120MHz

60MHz

2x

1 & 2

2 & 3

1 & 2

2 & 3

133MHz

66MHz

2x

1 & 2

2 & 3

1 & 2

1 & 2

150MHz

60MHz

2.5x

2 & 3

2 & 3

1 & 2

2 & 3

166MHz

66MHz

2.5x

2 & 3

2 & 3

1 & 2

1 & 2

180MHz

60MHz

3x

2 & 3

1 & 2

1 & 2

2 & 3

200MHz

66MHz

3x

2 & 3

1 & 2

1 & 2

1 & 2

Note: Pins designated should be in the closed position.

CPU TYPE SELECTION

Type

J13

J14

J15

J16

CX 6X86

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

AM K5 (B, C, F)

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

AM K5 (H, J, K)

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

P54C

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

P55C

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

CPU VOLTAGE SELECTION (SINGLE)

Voltage

JP5

JP17

3.38v

Pins 7 & 8 closed

Pins 2 & 3 closed

3.52v

Pins 9 & 10 closed

Pins 1 & 2 closed

CPU VOLTAGE SELECTION (DUAL)

Voltage

V core

JP5

JP17

3.38v

2.5v

Pins 1 & 2 closed

Pins 2 & 3 closed

3.38v

2.7v

Pins 3 & 4 closed

Pins 2 & 3 closed

3.38v

2.93v

Pins 5 & 6 closed

Pins 2 & 3 closed

3.52v

2.5v

Pins 1 & 2 closed

Pins 1 & 2 closed

3.52v

2.7v

Pins 3 & 4 closed

Pins 1 & 2 closed

3.52v

2.93v

Pins 5 & 6 closed

Pins 1 & 2 closed

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