Abit AR5E User Manual

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Introduction of BIOS

3-3

¬ CPU setup¡i CPU SOFT MENU™¡j

 

 

 

The CPU can be setup through a programmable switch (CPU SOFT MENU™ ), that replaces traditional manual hardware configuration. This feature allows the user to complete more easily the installation procedures. You can install the CPU without configuring any jumpers or switches. The CPU must be setup according its specifications.

In the first option, you can press <F1> at any time to display all the items that can be chosen for that option.

 

 

ROM PCI/ISA BIOS (XXXXXXXX)

 

 

 

 

!! CPU SOFT MENU!!

 

 

 

AWARD SOFTWARE, INC.

 

 

 

 

 

 

 

CPU Name Is

: Intel Pentium MMX

 

 

 

CPU Type (Speed)

: 133 (66x2)

 

 

 

-TurboFrequency

: Disable

 

 

 

 

-ExternalClock

: 66MHz

 

 

 

 

-MultiplierFactor

: 2

 

 

 

 

CPU Power Plane

: Dual Voltage

 

 

 

-CorePlane Voltage

: 2.80v

 

 

 

 

-I/OPlane Voltage

: 3.30v

 

 

 

 

 

 

 

 

 

 

 

 

 

Esc : Quit

¡ô¡õ¡÷¡ö : Select Item

 

 

 

 

F1 : Help

PU/PD/+/- :Modify

 

 

 

 

F5 : Old Values

(Shift)F2 : Color

 

 

 

 

F6 : Load BIOS Defaults

 

 

 

 

 

F7 : Load Setup Defaults

 

 

 

Fig 3-1CPU SOFT MENU™

 

CPU Name Is:

 

 

 

 

 

ä Intel Pentium

ä Intel Pentium MMX

 

 

ä AMD K5

 

ä AMD K6

 

 

ä Cyrix 6x86

 

ä Cyrix 6x86L

 

 

ä Cyrix M2

 

 

 

 

But when you boot the computer, the mainboard will automatically detect the CPU brand and type.

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Chapter 3

CPU Operating Speed:

This option sets the CPU speed. Different CPU brands use different techniques to indicate the CPU speed. For example, AMD and Cyrix use P- Rating.

In this field, the CPU speed is indicated like this: CPU speed (external clock x multiplier factor)

Select the CPU speed according the type and the speed of your CPU.

¡i Note 1¡j For Intel Pentium CPUs, you can choose the following settings:

ä 75 (50x1.5)

ä 90 (60x1.5)

ä 100

(66x1.5)

ä 120

(60x2)

ä 133

(66x2)

ä 150

(60x2.5)

ä 166

(66x2.5)

ä 200

(66x3)

¡i Note 2¡j ForAMD-K5CPUs from AMD, you can choose the following

P-Ratings:

 

 

ä PR75 (50x1.5)

ä PR90 (60x1.5)

ä PR100 (66x1.5)

ä PR120

(60x1.5)

ä PR133

(66x1.5)

ä PR166

(66x1.75)

ä PR200

(66x2)

 

 

¡i Note 3¡j For Cyrix 6x86 and 6x86L CPUs, you can choose the following

P-Ratings:

 

ä P120+ (50x2)

äP133+ (55x2)

ä P150+ (60x2)

äP166+ (66x2)

ä P200+ (75x2)

 

¡i Note 4¡j User define external clock and multiplier factor:

äUser Define

/External Clock:

ä 50MHz

ä 55MHz

ä 60MHz

ä 66MHz

ä75MHz

/Multiplier Factor:

You can choose the following multiplier factors:

ä 1.5

ä 1.75

ä 2.0

ä 2.5

ä 3.0

ä 3.5

However, differences will exist because of the various brands and types available.

Introduction of BIOS

3-5

Normally, we do not recommend that you use the “User Define” option to setup CPU speed and multiplier factor. This option is for setup of future CPUs whose specifications are still unknown. The specifications of all present CPUs are included in the default settings. Unless you are very familiar with all CPU parameters, it is very easy to make mistakes when you define by yourself the external clock and the multiplier factor.

/ Turbo Frequency:

This item will only be displayed if your CPU external clock supports Turbo mode.

The Turbo mode allows you to speed up the external clock by approximately 2.5%. This feature is used to verify the design flexibility. It is a very important tool for test units to verify CPU stability. Do not use this feature.

ä Disable: CPU external clock is operating within the normal limits.

ä Enable: CPU external clock is operating within the limts of the Turbo mode.

Solution in case of booting problem due to invalid clock setup:

Normally, if the CPU external clock setup is wrong, you will not be able to boot. In this case, turn the system off than on again. The CPU will automatically use its standard parameters to boot. You can then enter BIOS Setup again and set up the external clock.

When you change your CPU:

The AR5 mainboard have been designed in such a way that you can turn the system on after having inserted the CPU in the socket without having to configure any jumpers or DIP switches. But if you change your CPU, normally, you just have to turn off the power supply, change the CPU and then, set up the CPU parameters through CPU SOFT MENU™ . However, ifthe CPU brand and type is the same, and if the new CPU is slower than the old one, we offer you three methods to successfully complete the CPU change operation.

Method 1: Setup up the CPU for the lowest speed for its brand. Turn the power supply off and change the CPU. Then turn the system on again, and set up the CPU parameters through CPU SOFT MENU.

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Chapter 3

Method 2: Try turning the system on a few times (3~4 times) and the system will automatically use its standard parameters to boot. You can then enter BIOS SETUP again and set up the new parameters.

Method 3: Since you have to open the computer case when you change the CPU, it could be a good idea to use the JP6 jumper to erase the parameters of the original CPU and to enter BIOS Setup to set up CPU parameters again.

Note : The increase by 2.5% of the CPU speed is not a standard feature of this product. It is only for use by our development department to verify that the CPU is able to work normally when CPU speed, operating temperature and power supply are 2.5% higher or lower than the standard values. This is to guarantee product stability. We require the manufacturer of the Clock Generator to meet the demands of our development department and to add a TURBO Frequency feature used for testing purposes by our R&D department. Of course, you can use this feature to test the stability of your own system, but after you have tested the product, we recommend that you set it back to its normal value in order to guarantee system stability.

CPU Power Plane:

In the previous chapter we explained that the 586 CPUs can be divided into two types: single voltage and dual voltage. This option will normally auto-detectthe type of your CPU, so you don’t need to make any changes.

äSingle Voltage: Single voltage CPU

äDual Voltage: Dual voltage CPU

äSet up the voltage via CPU Marking

¤ When the CPU issingle voltage, the following options will be displayed to set up the voltage:

/Plane voltage:

ä3.60v ¡G Reserved

ä3.52v ¡G For Intel VRE standard CPUs andAMK-K5or Cyrix 8x86

CPUs

ä 3.38v¡G For Intel STD and VR standards CPUs

Introduction of BIOS

3-7

¤When the CPU is dual voltage, two options will be displayed to set up Vcore and Vio plane voltage

/Core Plane Voltage:

ä2.93v ¡G For AMD K6 and Cyrix 6x86L CPU.

ä2.80v ¡G For Intel Pentium MMX CPUs.

ä2.70v ¡G For future CPUs.

ä2.50v ¡G For future CPUs.

/I/O Plane Voltage:

ä3.52v ¡G Reserved

ä3.38v ¡G Some CPUs from AMD need this I/O Plane Voltage.

ä3.30v ¡G For most of the dual voltage CPUs (default) currently

available.

The CPU voltage must be set according to voltage indications via CPU Marking given by the manufacturer. Since the CPU voltage will decrease as technology improves, we have reserved some options according to what we can forecast from present documentation. We cannot give you detailed information about the voltage required by each kind of CPU in this chapter. For the correct values, refer to appendices B, C and D.

¤ Set up the voltage via CPU Marking:

If you consider using the Appendices to set up as too complicated, you can use the CPU Marking: within the options under “CPU Marking Is,” set up via CPU Marking on the CPU.

Notes:

1.If your CPU is a dual voltage one and that the voltage set up is 3.25V, our mainboard features a hardware protection circuit that will lower the voltage between 2.8V and 2.9V, which is within the CPU operating voltage limits.

2.The voltage value given is the central value. For example, the voltage range of 3.52V is 3.45V to 3.6V. The central voltage value between 3.45V and 3.6V is 3.52V.

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Chapter 3

Attention: After setting up the parameters and you leave the BIOS SETUP, and you have verified that the system can be turned on, do not press the Reset button or turn off the power supply. Otherwise the BIOS will not read correctly, the parameters will fail and you must enter CPU SOFT MENU™ again to set up the parameters all over again.

Introduction of BIOS

3-9

- Standard CMOS Setup Menu

It is the basic configuration parameters of the BIOS. These parameters include the settings of date, hour, VGA card, FDD and HDD.

Date(mm:dd:yy) : Wed,Jul 10 1996

 

 

 

 

 

 

 

Time(hh:mm:ss) : 14:53:31

 

 

 

 

 

 

 

 

HARDS

DISKS

Type

SIZE

CYLS

HEAD

PRECOMP

LANDZ

SECTOR

MODE

Primary

Master :

None

0

0

0

0

0

0

------

Primary

Slave :

None

0

0

0

0

0

0

------

Secondar

Master : None

0

0

0

0

0

0

------

y

 

 

 

 

 

 

 

 

 

 

Secondar

Slave :

None

0

0

0

0

0

0

------

y

 

 

 

 

 

 

 

 

 

 

Drive A: 1.44M,3.5IN.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Drive B: None

 

 

 

 

 

 

Base Memory :

640K

 

Floppy 3Mode Support: Disable

 

 

 

Extended Memory :

3328K

 

 

 

 

 

 

 

 

Expanded Memory :

0K

 

Video: EGA/VGA

 

 

 

 

 

 

Other Memory :

128K

 

Halt On: All Errors

 

 

 

 

 

-----------------------------------------

 

 

 

 

 

 

 

 

 

 

Total Memory: 4096K

 

Esc: Quit

 

 

¡ô¡õ¡÷¡ö : Select Item

 

 

PU/PD/+/- :Modify

F1: Help

 

 

(Shift)F2: Change color

 

 

F3 : Toggle Calender

 

 

 

 

 

 

 

 

 

 

 

Fig 3-2Standard CMOS Setup Menu

Set up of HDD operating mode

¡i NORMAL, LBA, LARGE¡j

Since old operating systems were only able to support HDD whose capacity was not bigger than 528MB, any hard disk with more than 528MB was unusable. AWARD BIOS features a solution to this problem: you can, according to your operating system, choose three operating modes: NORMAL, LBA or LARGE.

ä Normal mode:

Standard normal mode supports hard disks of 528MB or less. This mode directly uses positions indicated by Cylinders (CYLS), Heads, and Sectors to access data.

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Chapter 3

ä LBA (Logical Block Addressing) mode:

LBA mode supports hard disk drives up to 8.4Giga. This mode uses a different method to calculate the position of disk data to be accessed. It translates Cylinders (CYLS), Heads and Sectors into a logical address where data are located. The Cylinders, Heads, and Sectors displayed in this menu do not reflect the actual structure of the hard disk, they are just reference values used to calculate actual positions. Currently, all high capacity hard disks support this mode, that’s why we recommend you use this mode. The HDD AUTODETECTION option in the Main Menu will automatically detect the parameters of your hard disk and the mode supported.

ä LARGE Mode:

When the number of cylinders (CYLs) of the hard disk exceeds 1024 and DOS is not able to support it, or if your operating system does not support LBA mode, you should select this mode.

FDD supporting 3 Mode:

3 Mode floppy disk drives (FDD) are 3 1/2” drives used in Japanese computer systems. If you need to access data stored in this kind of floppy, you must select this mode, and of course you must have a 3 Mode floppy drive.

2 For further information about HDD installation, refer to Appendix E.

Introduction of BIOS

3-11

® BIOS Features Setup Menu

BIOS Features Setup Menu has already been set for maximum operation. If you do not really understand each of the options in this menu, we recommend you use default values.

In each item, you can press <F1> at any time to display all the options for this item.

ROM PCI/ISA BIOS (XXXXXXXX)

BIOS FEATURES SETUP

AWARD SOFTWARE, INC.

Virus Warning

: Disabled

Video BIOS Shadow

: Enabled

CPU Internal Cache

: Enabled

C8000-CBFFFShadow

: Disabled

External Cache

: Enabled

CC000-CFFFFShadow

: Disabled

Quick Power on Self Test

: Enabled

D0000-D3FFFShadow

: Disabled

Boot Sequence

: A,C, SCSI

D4000-D7FFFShadow

: Disabled

Swap Floppy Drive

: Disabled

D8000-DBFFFShadow

: Disabled

Boot Up Floppy Seek

: Disabled

DC000-DFFFFShadow

: Disabled

Boot Up NumLock Status

: On

 

 

 

IDE HDD Block Mode

: Enabled

 

 

 

Typematic Rate Setting

: Enabled

 

 

 

Typematic Rate(Chars/Sec)

: 30

 

 

 

Typematic Delay (Msec)

: 250

 

 

 

Security Option

: Setup

 

 

 

PCI/VGA Pallete Snoop

: Disabled

 

 

 

OS Select For DRAM > 64MB

: Non-OS2

Esc : Quit

¡ô¡õ¡÷¡ö : Select Item

 

 

F1

: Help

PU/PD/+/- :Modify

 

 

F5

: Old Values

(Shift)F2 : Color

 

 

F6

: Load BIOS Defaults

 

 

 

F7

: Load Setup Defaults

 

Fig 3-3BIOS Features Setup

Virus Warning:

This item can be set as Enable or Disable.

When this feature is enabled, if there is any attempt from a software or an application to access the boot sector or the partition table, the BIOS will warn you that a boot virus is attempting to access to the hard disk.

3-12

Chapter 3

CPU Internal Cache:

This item is used to Enable or to Disable the CPU internal cache. When the cache is set at Disable, it is much slower, so the default setting for this item is Enable. Some old and very bad programs will make the computer malfunction or crash if the system speed is to high. In that case, you should Disable this feature.

CPU External Cache:

This item is used to enable or to disable the CPU external cache. When the external cache is enabled, the system works faster. The default is Enable.

Quick power on self test:

After the computer has been powered on, the BIOS of the mainboard will run a series of tests in order to check the system and its peripherals. If the Quick power on self test feature is Enable, the BIOS will simplify the test procedures in order to speed up the boot process. The default is Enable.

Boot Sequence:

When the computer boots up, it can load the operating system from floppy drive A:, hard disk drive C:, SCSI disk drive or CD-ROM.There are many options for the boot sequence:

ΠA, C, SCSI

C, A, SCSI

Ž C,CD-ROM,A

CD-ROM,C, A

D, A, SCSI (at least 2 IDE HDD can be used) E, A, SCSI (at least 3 IDE HDD can be used)F, A, SCSI (at least 4 IDE HDD can be used)SCSI, A, C

SCSI, C, A

Swap Floppy Drive:

This item can be set as Enable or Disable.

When this feature is enabled, you don’t need to open the computer case to swap the position of floppy disk drive connectors. Drive A: can be set as drive B:, and drive B: can be set as drive A:.