GEMLIGHT COMPUTER, LTD.

GMB-P56IPS (VER. 3.02)

Device Type

Mainboard

Processor

CX 6X86/AM K5/ Pentium/Pentium MMX

Processor Speed

75/90/100/110/120/133/150/166/200MHz

Chip Set

Intel 430TX

Maximum Onboard Memory

128MB (EDO supported)

Cache

256/512KB

BIOS

Award/AMI

Dimensions

220mm x 230mm

I/O Options

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

CONNECTIONS

Purpose

Location

Purpose

Location

Reset switch

J1

USB 1 connector

J12/pins 2 - 5

Green PC connector

J2

PS/2 mouse interface

J12/pins 6 - 10

Green PC LED connector

J3

USB 2 connector

J12/pins 12 - 15

Speaker

J4

IR connector

J12/pins 16 - 20

IDE interface LED

J5

Parallel port

J13

Power LED & keylock

J6

Serial port 2

J14

IDE interface 1

J9

Serial port 1

J15

IDE interface 2

J10

PS/2 mouse port

J20

Floppy drive interface

J11

32-bit PCI slots

PC1 - PC4

USER CONFIGURABLE SETTINGS

Function

Label

Position

»

Flash BIOS voltage select 5v

JP4

Pins 2 & 3 closed

 

Flash BIOS voltage select 12v

JP4

Pins 1 & 2 closed

»

CMOS memory normal operation

JP5

Open

 

CMOS memory clear

JP5

Closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

8MB

(2) 1MB x 32

None

16MB

(2) 1MB x 32

(2) 1MB x 32

16MB

(2) 2MB x 32

None

24MB

(2) 2MB x 32

(2) 1MB x 32

32MB

(2) 2MB x 32

(2) 2MB x 32

32MB

(2) 4MB x 32

None

40MB

(2) 4MB x 32

(2) 1MB x 32

48MB

(2) 4MB x 32

(2) 2MB x 32

64MB

(2) 4MB x 32

(2) 4MB x 32

64MB

(2) 8MB x 32

None

72MB

(2) 8MB x 32

(2) 1MB x 32

80MB

(2) 8MB x 32

(2) 2MB x 32

96MB

(2) 8MB x 32

(2) 4MB x 32

128MB

(2) 8MB x 32

(2) 8MB x 32

DIMM VOLTAGE SELECTION

Voltage

S7

S8

5V

Pins 1 & 2 closed

Pins 1 & 2 closed

3.3V

Pins 2 & 3 closed

Pins 2 & 3 closed

CACHE CONFIGURATION

Size

Bank 0

TAG

256K

(2) 32K x 32

16K x 8 or 32K x 8

512K

(2) 64K x 32

16K x 8 or 32K x 8

CPU SPEED SELECTION (INTEL)

Speed

Clock speed

Multiplier

JP6

JP7

S1

S2

S3

75MHz

50MHz

1.5x

1 & 2

1 & 2

Closed

Closed

Open

90MHz

60MHz

1.5x

1 & 2

1 & 2

Closed

Open

Open

100MHz

66MHz

1.5x

1 & 2

1 & 2

Open

Closed

Open

120MHz

60MHz

2x

1 & 2

2 & 3

Closed

Open

Open

133MHz

66MHz

2x

1 & 2

2 & 3

Open

Closed

Open

150MHz

60MHz

2.5x

2 & 3

2 & 3

Closed

Open

Open

166MHz

66MHz

2.5x

2 & 3

2 & 3

Open

Closed

Open

180MHz

60MHz

3x

2 & 3

1 & 2

Closed

Open

Open

200MHz

66MHz

3x

2 & 3

1 & 2

Open

Closed

Open

Note: Designated pins are in the closed position.

CPU SPEED SELECTION (INTEL MMX)

Speed

Clock speed

Multiplier

JP6

JP7

S1

S2

S3

166MHz

66MHz

2.5x

2 & 3

2 & 3

Open

Closed

Open

200MHz

66MHz

3x

2 & 3

1 & 2

Open

Closed

Open

Note: Designated pins are in the closed position.

CPU SPEED SELECTION (CX 6X86)

Speed

Clock speed

Multiplier

JP6

JP7

S1

S2

S3

120MHz

50MHz

2x

1 & 2

2 & 3

Closed

Closed

Open

133MHz

55MHz

2x

1 & 2

2 & 3

Open

Open

Open

150MHz

60MHz

2x

1 & 2

2 & 3

Closed

Open

Open

166MHz

66MHz

2x

1 & 2

2 & 3

Open

Closed

Open

200MHz

75MHz

2x

1 & 2

2 & 3

Open

Open

Closed

Note: Designated pins are in the closed position.

CPU SPEED SELECTION (AM K5)

Speed

Clock speed

Multiplier

JP6

JP7

S1

S2

S3

75MHz

50MHz

1.5x

1 & 2

1 & 2

Closed

Closed

Open

90MHz

60MHz

1.5x

1 & 2

1 & 2

Closed

Open

Open

100MHz

66MHz

1.5x

1 & 2

1 & 2

Open

Closed

Open

120MHz

60MHz

2x

1 & 2

1 & 2

Closed

Open

Open

133MHz

66MHz

2x

1 & 2

1 & 2

Open

Closed

Open

150MHz

60MHz

2.5x

1 & 2

1 & 2

Open

Closed

Open

166MHz

66MHz

2.5x

2 & 3

2 & 3

Open

Closed

Open

CPU VOLTAGE SELECTION (SINGLE)

Voltage

Q2

JP1

S4

S5

S6

3.4V

2 Transistors installed

Closed

Closed

Closed

Closed

3.5V

2 Transistors installed

Open

Closed

Closed

Closed

CPU VOLTAGE SELECTION (DUAL)

V I/O

V Core

Q2

JP1

S4

S5

S6

3.4V

2.8V

2 Transistors installed

Closed

Open

Open

Open