AOpen AP57-HW User Manual

Chapter 2

Hardware Installation

This chapter gives you a step-by-step procedure on how to install your system. Follow each section accordingly.

Caution: Electrostatic discharge (ESD) can damage your processor, disk drives, expansion boards, and other components. Always observe the following precautions before you install a system component.

1. Do not remove a component from its protective packaging until you are ready to install it.

2. Wear a wrist ground strap and attach it to a metal part of the system unit before handling a component. If a wrist strap is not available, maintain contact with the system unit throughout any procedure requiring ESD protection.

2-1

Hardware Installation

PWR 1

COM1

COM2

JP22

JP7

2.1 Jumper and Connector Locations

The following figure shows the locations of the jumpers and connectors on the system board:

PS2 MS

KB1

I

S

A

2

3

S

S A

USB

A

1

BIOS

PCI 4

PCI 3

PCI 2

PCI 1

S

I M M

4

FDCPRINTER

IDE1IDE2

S

I

M

1

2

3

HDD LED

JP8

2-2

FAN

IrDA

PANEL

JP3 JP4

5571

JP9

JP11

JP10

Hardware Installation

Jumpers:

JP1,JP2: CPU frequency ratio JP3,JP4,JP13: CPU external (bus) clock JP7: CPU core voltage setting (Vcore) JP8: I/O voltage setting (Vio) JP9,JP10,JP11: CPU type (Single/Dual voltage, Vcpuio source selection.) JP22: CPU Burst Mode (Linear for Cyrix, Toggle for Intel/AMD.) JP14: Clear CMOS JP18: Onboard Super I/O enable/disable JP20: Onboard PS/2 mouse enable/disable

Connectors:

KB1: AT keyboard connector PWR1: AT (PS/2) power connector PS2 MS: PS/2 mouse connector USB: USB connector COM1: COM1 connector COM2: COM2 connector FDC: Floppy drive connector PRINTER: Printer connector IDE1: IDE1 primary channel IDE2: IDE2 secondary channel FAN: CPU fan connector IrDA: IrDA (Infrared) connector HDD LED: HDD LED connector PANEL: Front panel (Multifunction) connector

2-3

Hardware Installation

3

2.2 Jumpers

Jumpers are made by pin headers and plastic connecting caps for the purpose of customizing your hardware. Doing so requires basic knowledge of computer hardware, be sure you understand the meaning of the jumpers before you change any setting. The onboard jumpers are normally set to their default with optimized settings.

On the mainboard, normally there is a bold line marked beside pin 1 of the jumper, sometimes, there are numbers also. If we connect (short) plastic cap to pin 1 and 2, we will say set it at 1-2, and when we say jumper is open, that means no plastic cap connected to jumper pins.

Open

1 2

Short

1 2

Jumper set at 1-

1 2

Jumper set at 2-3

1 2

2

2-4

2.2.1 Setting the CPU Voltage

11

4

Hardware Installation

JP7

1-2 3-4 5-6 7-8 9-10 11-12

JP8

1-2 3-4

CPU Core Voltage (Vcore)

3.45V (default for P54C)

3.52V (Cyrix or AMD)

2.9V (AMD K6)

2.8V (PP/MT P55C)

2.7V

2.5V

JP7

1 3 5 7 9

10 12

3.45V

(default for

P54C)

I/O Voltage (Vio)

3.45V (default)

3.52V

JP7 is used to select CPU core voltage (Vcore), normally it is set to default

3.45V for INTEL Pentium P54C. It must be changed if you have CPU with different core voltage, such as INTEL PP/MT (P55C), AMD K5/K6 and Cyrix 6x86, refer to the CPU specification for more details.

2 4 6 8

JP7

1

2

3

4

5

6

7

8

9

10 12

3.52V

(Cyrix 6x86

JP7

1

2

3

4

5

6

7

8

9

10 12

2.9V

(AMD K6)

or AMD K5)

JP8 is reserved for test only, which sets the voltage of onboard chipset and PBSRAM (Vio). When you are using dual voltage CPU, JP8 also provides CPU I/O voltage (Vcpuio).The default is 3.45V.

JP7

1 3 5 7 9

10 12

2.8V

( PP/MT

P55C)

2 4 6 8

JP8

3

3.45V

(default)

JP8

1

2

1

3

2

3.52V

2-5

Hardware Installation

6

1 2

5 6

256

1 2

5 6

JP9

Close

Open

JP10

Open

Close

JP11

Close

Open

CPU Type (Vcpuio)

Single voltage CPU Vcpuio = Vcore (default) Dual voltage CPU Vcpuio = Vio (PP/MT P55C)

JP11 JP9

5

1

5

2

JP10

Single voltage

(Vcpuio = Vcore)

Set the jumper JP9, JP10 and JP11 according to the type of

CPU. They are actually the selection of CPU I/O Voltage (Vcpuio). Normally, for single voltage CPU, Vcpuio is equal to Vcore, but for CPU that needs dual voltage such as PP/MT (P55C), Cyrix 6x86L, Vcpuio must be set to Vio, and it is different from Vcore.

JP11 JP9

1

2

1

JP10

Dual voltage

(Vcpuio = Vio)

CPU Type Vcore Vio Vcpuio JP7 JP8 JP9 JP10 JP11

INTEL P54C 3.45V 3.45V Vcore 1-2 1-2 Closed Open Closed INTEL PP/MT 2.8V 3.45V Vio 7-8 1-2 Open Closed Open AMD K5 (Single voltage) AMD K6 2.9V 3.45V Vio 5-6 1-2 Open Closed Open Cyrix 6x86 3.52V 3.45V Vcore 3-4 1-2 Closed Open Closed Cyrix 6x86L 2.8V 3.45V Vio 7-8 1-2 Open Closed Open

3.52V 3.45V Vcore 3-4 1-2 Closed Open Closed

Caution: Above table is possible settings of current CPU available on the market. The correct setting may vary because of new CPU product, refer to your CPU specification for more details.

2-6

2.2.2 Selecting the CPU Frequency

3 2 1

Hardware Installation

JP1

JP2

CPU Frequency Ratio

Intel Pentium, Cyrix 6x86 and AMD K5/K6 CPU are designed to have

1-2 2-3 2-3 1-2

1-2 1-2 2-3 2-3

1.5x (3.5x) 2x

2.5x (1.75x) 3x

different Internal (Core) and External (Bus) frequency. The ratio of Core/Bus frequency is selected by JP1 and JP2, which CPU is using to multiply external clock and produce internal frequency.

Core frequency = Ratio * External bus clock

JP1 & JP2

1.5x (3.5x)

JP1 & JP2

2.5x (1.75x)

Note: The feature CPU Intel PP/MT 233MHz is using 1.5x jumper setting for 3.5x frequency ratio, and AMD PR166 is using 2.5x setting for 1.75x frequency ratio.

Note: The future CPUs have not been tested by AOpen Quality Test Department. It is possible that this mainboard can not support these future CPUs.

JP1 & JP2

2x

3x

JP3

2-3 1-2 2-3

JP4

2-3 2-3 1-2

JP13

1-2 5-6 1-2 3-4 3-4

CPU External Clock

50MHz 60MHz 66MHz

JP3, JP4 and JP13 are the selections of CPU external clock (bus clock), which is actually the clock from clock generator.

2-7

Hardware Installation

3

JP3 & JP4

1 2

JP13

5 6

50MHz

1

2

JP3 & JP4

1 2

JP13

5 6

60MHz

1

2

JP3 & JP4

1 2

JP13

5 6

66MHz

Caution: Following table are possible settings of current CPU available on the market. The correct setting may vary because of new CPU product, refer to your CPU specification for more details.

Intel Pentium

P54C 75 75MHz = 1.5X 50MHz 1-2 & 1-2 2-3 & 2-3 1-2 & 5-6 P54C 90 90MHz = 1.5x 60MHz 1-2 & 1-2 1-2 & 2-3 1-2 & 3-4 P54C 100 100MHz = 1.5x 66MHz 1-2 & 1-2 2-3 & 1-2 3-4 P54C 120 120MHz = 2x 60MHz 2-3 & 1-2 1-2 & 2-3 1-2 & 3-4 P54C 133 133MHz = 2x 66MHz 2-3 & 1-2 2-3 & 1-2 3-4 P54C 150 150MHz = 2.5x 60MHz 2-3 & 2-3 1-2 & 2-3 1-2 & 3-4 P54C 166 166MHz = 2.5x 66MHz 2-3 & 2-3 2-3 & 1-2 3-4 P54C 200 200MHz = 3x 66MHz 1-2 & 2-3 2-3 & 1-2 3-4

CPU Core Frequency

Ratio External

Bus Clock

JP1 & JP2 JP3 & JP4 JP13

1

2

Intel Pentium

PP/MT 150 150MHz = 2.5x 60MHz 2-3 & 2-3 1-2 & 2-3 1-2 & 3-4 PP/MT 166 166MHz = 2.5x 66MHz 2-3 & 2-3 2-3 & 1-2 3-4 PP/MT 200 200MHz = 3x 66MHz 1-2 & 2-3 2-3 & 1-2 3-4 PP/MT 233 200MHz = 3.5x 66MHz 1-2 & 1-2 2-3 & 1-2 3-4

CPU Core Frequency

Ratio External

Bus Clock

JP1 & JP2 JP3 & JP4 JP13

2-8

AOpen AP57-HW User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual