GEMLIGHT COMPUTER, LTD.

GMB-P56IPS (VER. 3.01)

Processor

CX M1/AM K5/Pentium

Processor Speed

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

Chip Set

Intel

Video Chip Set

None

Maximum Onboard Memory

128MB (EDO supported)

Maximum Video Memory

None

Cache

256/512KB

BIOS

AMI/Award

Dimensions

230mm x 220mm

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), IR connector, USB connectors (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Reset switch

J1

USB connector 1

J12 pins 1 - 5

Green PC connector

J2

PS/2 mouse interface

J12 pins 6 - 10

Green PC LED

J3

USB connector 2

J12 pins 11 - 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

32-bit PCI slots

PC1 - PC4

Floppy drive interface

J11

   

USER CONFIGURABLE SETTINGS

Function

Label

Position

 

Flash BIOS voltage select 12v

JP4

Pins 1 & 2 closed

 

Flash BIOS voltage select 5v

JP4

Pins 2 & 3 closed

»

CMOS memory normal operation

JP5

Open

 

CMOS memory clear

JP5

Closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

4MB

(2) 512K x 32

None

8MB

(2) 1M x 32

None

8MB

(2) 512K x 32

(2) 512K x 32

12MB

(2) 1M x 32

(2) 512K x 32

16MB

(2) 2M x 32

None

16MB

(2) 1M x 32

(2) 1M x 32

20MB

(2) 2M x 32

(2) 512K x 32

24MB

(2) 2M x 32

(2) 1M x 32

32MB

(2) 4M x 32

None

32MB

(2) 2M x 32

(2) 2M x 32

36MB

(2) 4M x 32

(2) 512K x 32

40MB

(2) 1M x 32

(2) 4M x 32

48MB

(2) 4M x 32

(2) 2M x 32

64MB

(2) 8M x 32

None

64MB

(2) 4M x 32

(2) 4M x 32

68MB

(2) 512K x 32

(2) 8M x 32

72MB

(2) 8M x 32

(2) 1M x 32

80MB

(2) 2M x 32

(2) 8M x 32

96MB

(2) 8M x 32

(2) 4M x 32

128MB

(2) 8M x 32

(2) 8M x 32

Note: Board accepts EDO memory. Banks are interchangeable.

DRAM VOLTAGE CONFIGURATION

Voltage

S7

S8

3.3v

Pins 2 & 3 closed

Pins 2 & 3 closed

5v

Pins 1 & 2 closed

Pins 1 & 2 closed

CACHE CONFIGURATION

Size

Bank 0

TAG

256KB

(2) 32K x 32

(1) 16K/32K x 8

512KB

(2) 64K x 32

(1) 16K/32K x 8

CPU SPEED SELECTION (CYRIX)

CPU 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

66MHz

2x

1 & 2

2 & 3

Open

Open

Closed

Note: Pins designated should be in the closed position.

CPU SPEED SELECTION (AMD)

CPU 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

1.5x

1 & 2

1 & 2

Closed

Open

Open

150MHz

66MHz

1.5x

1 & 2

1 & 2

Open

Closed

Open

166MHz

66MHz

2.5x

2 & 3

2 & 3

Open

Open

Open

Note: Pins designated should be in the closed position.

CPU SPEED SELECTION (INTEL)

CPU 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

200MHz

66MHz

3x

2 & 3

1 & 2

Open

Closed

Open

Note: Pins designated should be in the closed position.

CPU VOLTAGE SELECTION

Voltage

V core

JP1

S4

S5

S6

3.4v (single)

N/A

Closed

Closed

Closed

Closed

3.4v (dual)

2.8v

Closed

Open

Open

Open

3.5v (single)

N/A

Open

Closed

Closed

Closed