Freetech 486F23 486F23 manual

Page 1

Part No. 03-0023X-00

Page 2

The information contained in this user’s manual and all accompanying documentation is copyrighted and all rights reserved. This publication may not, in whole or in part, be reproduced, transcribed, or computer language or transmitted in any form whatsoever without the for copies retained purposes.

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manufacturer

and

all content the

revision

1992

stored

in a retrieval system, translated into any language

prior written consent from

the purchasers for their personal

the

manufacturer, except

reserves the right to revise this user’s

accompanying documentation and to make

without obligation

change.

to notify

any

person or organization of

archival

manual

changes in the

IN NO EVENT INDIRECT, DAMAGES

WILL

THE VENDOR BE

SPECIAL

INCIDENTAL., OR CONSEQUENTIAl.

ARISING OUT OF

THE

LIABLE FOR DIRECT

USE OR

INABILITY THIS PRODUCT OR DOCUMENTATION, EVEN OF

THE POSSIBILITY

TH E

VENDOR

SHALL

OF SUCH DAMAGES. IN PARTICULAR,

NOT

HAVE

LIABILITY FOR ANY

HARDWARE, SOFTWARE, OR DATA STORED OR

PRODUCT, INCLUDJNG REPLACING, OR RECOVERING SOFTWARE,

IBM

is a

AMI

is a registered

Intel

is a 80486 is a VESA VL-Bus is a registered

DATA.

registered trademark

trademark

registered trademark

registered reademark

trademark of Video

THE

COSTS OF

SUCH

HARDWARE,

of International Business

of American

Megatrends

of Intel Corporation

Intel

Corporation

Electronics Standard

Association.

TO USE

ADVISED

USED WITH

REPAIRING,

Machines

Inc.

Page 3

Table Of Contents

Chapter 1

Introduction

What is Advantages 80486VESA Motherboard Overview 80486VESA Features Performance Report

Chapter 2

Configuration

Connector and Jumper Settings CPU Selection Cache Memory

VESA Motherboard

Chapter 3

Installation and Operation

Before Installing Memory Configuration

System Speed Change

Memory Caching

VESA VL-Bus?

VESA VL.-Bus

and

Layout

Configuration

VL-Bus Identifier

Diagram

You

begin

The

SIMM Modules

5 5 9

IO 10 11

12 12 13 14 15 15

16 16 16 20

24 25

Page 4

1 Introduction

What is VESA VL-Bus?

The VESA Standard Association committee. The generally follows the 486 CPU local bus. Additional hardware functions intrractinn

capabilities of the

100Mb/sec (at 50

compatibility with

VL-Bus is a proposal from

are added to accommodate VL-Bus master devices

with

the system I/O bus. The

16-bit

ISA bus to

MHz data transfer rate, while maintaining

ISA

add-on

boards.

the

Video

architecture

VL-bus

32-bus

architecture and up to

Electronics

of the

extends

VL-Bus

the

Advantage of VESA VL-Bus

and

Page 5

Chapter 1: Introduction

80486VESA Motherboard Overview

The 80486VESA system board is a high performance, function enchanced computer system board that combines the power of Intel’s new 80486 CPU and the VESA VL-bus. The includes a variety of high-powered features. Its high performance capability can provide an ideal system board solution for a wide range of demanding applications like CAD/CAM/CAE, database management, image processing, artificial intelligence, desktop publishing, and the environments of network and multiuser systems. The 80486VESA system board fully utilizes the 32-bit CPU power.

The 80486VESA system board also incorporates an Intel 80486 microprocessor which has an 8 KByte static RAM cache. is a four-way set associative cache controller implemented on the 80486 chip

and

an internal enhanced numeric coprocessor unit. The system also has an option to accommodate 256KB of external cache.

board

design

Included

64KB, 128KB,

and

Because of its unique memory subsystem design, the 80486VESA allows for 1 Megabyte to 32 Megabytes of 32-bit high speed memory by using

80486VESA

User’s Manual

256KB, 1MB,

and/or 4MB SIMM

modules.

Page 6

Chapter

Introduction

80486VESA Features

l Intel 80486 microprocessor

KBytes static

Internal enhanced numeric coprocessor unit (486DX, 486DX2,

487SX,

l Optional 64/128/256KBytes external cache l SIMM module memory on system board expandable from 1

Megabyte to 32 Megabytes

l Dual system speed via hardware or software selection l System and video BIOS relocateable to RAM area for enhanced

performance

l Two 32-bit VL-Bus, two

slots

l Fast A20 implementation to speed-up multitasking operating

system

l Hidden DRAM refresh to boost system performance l SiS-460 Single Chip

RAM with four-way set associative internal cache

486SX2)

8-bit

ISA bus and four 16-bit ISA

bus

Performance Report

80486VESA-20 MHz:

l Landmark Speed Rating l Power Meter MIPS

80486VESA-25 MHz:

l Landmark Speed Rating l Power Meter MIPS

80486VESA-33 MI-Iz:

l Landmark Speed Rating

l Power Meter MIPS

80486VESA-50 MHz:

l Landmark Speed Rating l Power Meter MIPS

: 91.2 MHz (Ver. 1.14) : 8.898 MIPS (Ver. 1.3)

: 114.1

11.136 MIPS (Ver. 1.3)

: 151.9

14.819 MIPS (Ver. 1.3)

: 200 +

MHz

: 22.271 MIPS (Ver. 1.3)

80486VESA User’s Manual

(Ver. 1.14)

Page 7

Chapter 2: Configuration a Layout

Configuration and layout

Connector and Jumper Settings

Before installing the 80486VESA system board, make sure the connectors and jumper settings are set for your configuration.

The 80486VESA system board has two jumpers (JP9, CPU Type selection, and two jumpers (JP12, JP13) for the Cache Size selection. Connectors are also provided for the front panel interface between the system board and the computer chassis. The functions and settings of each connector and jumper setting are explained as follows (see Figure 1, page 11 for locations).

Front Panel Reset Connector

The reset button connector is a 2-pin single in-line BERG strip. It is used to reboot the system and will allow safe re-initialization of the system at any time. The connector should always be set in the OFF position, otherwise the system will continually reset itself. The pin assignments are:

JP14 Pin#

1 2

Front Panel Turbo Connector

Connector connector for the “Turbo” processor speed which can allow you switch between system speeds. (Please refer to Chapter 3 “Installation switching procedures). The pin assignments are:

JP15

is a 2-pin single in-line BERG strip. It is the

Operation” for a detailed description on speed

(JP14)

Assignment Ground

Reset Strobe

(JP15)

JP1O)

for the

80486VESA

User’s

Manual

Page 8

JPl5 Pin#

Assignment

Front Panel Turbo LED Connector

Connector JP16 is a connected to an LED display indicating the CPU speed. display lights up when the CPU is running at full speed (Please refer to Chapter 3 “Installation about speed change). The pin assignments arc:

2-pin

JP16

Pin#

single in-line

Front Panel Keylock and Power LED Connector

Connector

for the front panel keylock and power LED connection connected to a lock on your system the keyboard by switching

JP18

is a 5-pin single in-line

Ground

Turbo Control

Operation”

Assignment

the key.

The pin

(JP16)

BERG

strip. It

for more information

BERG

strip which

case you can

assignments are:

can be

The

When

enable or

(JP18)

provides

disable

Page 9

Chapter 2: Configuration and Layout

Front Panel Speaker Connector (JP17)

Connector

for the front panel speaker connection. The pin assignments are:

Power Supply Connector

There is a power supply connectors on-board. The pin assignments are:

JP17

is a 4-pin single in-line BERG strip which provides

JP17

Pin#

1 2 3 4

PWl

Pin#

2 3 4 5 6 7 8

9 10 11 12

Assienment power good

VDC

+12

VDC

-12 VDC ground ground ground ground

-5VDC +5VDC +5VDC +5VDC

(PW1)

Assignment

speaker data N. C. ground +5

Page 10

Chapter 2: Configuration and

Layout

External Battery

The 80486VESA motherboard provides one supply connector. The pin assignments are:

Monitor Type

Jumper JP2 is used to set the display type. The motherboard is designed to work with both monochrome and color display

monitors. The pin assignments are:

(JPl)

external

JP1 Pin#

2 3 4

Assignment

Battery Positive No Connection Ground Ground

(JP2)

JP2

Pin#

1&2

(Closed)

l&2

(Open)

Function

Monochrome Monitor Color Monitor

battery

Keyboard Connector

The keyboard connector is a 5-pin DIN connector. This connector consist of a 90-degree printed circuit board PCB mounting. The pin assignments are:

KBl Pin#

(KBl)

Assignment keyboardclock

keyboarddata spare ground +5

80486VESA User’s Manual

Page 11

Chapter 2: Configuration and Layout

CPU Type Selection

The 80486VESA motherboard can accomodate either the Intel 486DX, 486DX2,486SX, 487SX, 486 Over Drive, 486SX/DX PQFP or

P24T.

There are two jumpers to be set for the microprocessor Selection. Configuration of the correct CPU setting will allow compatibility with various low end and high end applications. The jumper settings are:

486SX 486DX/486DX2

486 Over Drive 168-pin 487SX/487SX2

486 Over Drive 169-pin P24T

486DX/486DX2 486SX/DX-PQFP l-2,3-4 l-2 Open Close 486 Over Drive 168-pin

487SX/487SX2 486 Over Drive 169-pin P24T

486SX/DX-PQFP

486SX/DX-PQFP l-2,3-4

1-2,3-4

2-3

l-2,3-4 1-2 Open Close

l-2,3-4 2-3 Open Close

l-2 Close Open

Open Open Close

2-3 Open Close

CPU Clock Selection

The 80486 VESA motherboard uses a CPU frequency generator to

generate the clock instead of oscillator. There are three jumpers to be set

for the CPU clock selection. The jumper settings are:

MHz Open

MHz

40 33 MHz Close 25 MHz Open

Close Open Close Close

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

80486VESA

User’s Manual

Page 12

Cache Memory Configuration

There are two jumpers to be set for the cache memory selection The jumper selections are as follows:

Note:

64K

128K

256K 2-3

Table 3: Cache Memory Configurations

For 64K

U36, U37, U39, For 128K

SRAM in locations U34, U35, U36, For 256K

U35, U36, U37, U39,

cadre,

install 8Kx8 SRAM in locations

U40,

cache,

install 8Kx8

cache install

Open

1-2

U41,

and

U42.

SRAM

32Kx8 SRAM in

U40, U41,

and U42.

and

VESA VL-Bus Identifier Jumpers

The identifier jumpers (JP19,

the speed of the host CPU.

0 wait write min. 1 wait write min.

JP20)

allow VL-Bus slave to identify

Open Close

Open Close Close

locations

U37.

locations

(JP19,

1143,

U43,

JP20)

U34,

1135,

and 32Kx8

U34,

<=33MHz

33MHz

Open Close

80486VESA Users Manual

Page 13

Page 14

Chapter 3: Installation and Operation

Installation and Operation

Before You Begin

Before removing the motherboard from its anti-static bag, you need to eliminate any static electricity that may be accumulated on your body. The charge that can build up in your body may be more than enough to damage integrated circuits on the system board. Therefore, it is important to observe basic precautions whenever you will handle or use computer components. Although areas with humid climate are much less prone to static build-up, it is best to always safeguard against accidental damage that may lead to costly repairs. The following measures sufficient to protect your equipment from static discharge:

l After removing the system cover, discharge any static

electricity that might have accumulated in your body by touching a grounded or anti-static surface pads). If nothing is available, touch the power supply

ing. This assumes the system unit is plugged in

ing

the case. De certain to do this

components from their anti-static

before removing

coverings

(e.g.

anti-static

should

hous

and ground

*When handling separate cards, boards or modules, be cau-

tious to avoid contacting with the components on them, and also with the “gold edge” connectors that plug sion bus. It is best to handle them either

mounting brackets that attach to the slot opening in the

system cases.

intended to advise reasonable care to charge problems.

l Make certain that everything that

including the power supply,

stallation work.

Iowever, the above recommendations arc just

unplugged

avoid

connects to

into the expan-

their edges or by

the static dis-

the system case,

before doing the in-

Page 15

Chapter 3: Installation and Operation

Installing The SIMM Modules

The 80486VESA system board can accommodate up to a maximum of 32 megabytes of memory on board using 8 sockets

for the standard SIMM modules are available for use with 256KB x 4MB x 9

80 nanosecond, fast page mode SIMM memory modules. Each bank contains four SIMM memory sockets. When installing or removing the SIMM memory modules, extreme care must be taken to avoid damage to the SIMM sockets. The 80486VESA system board can be configured for various memory

configurations from

the memory configurations available).

To install a SIMM memory module, carefully follow the steps

below: Step 1 Insert the SIMM module’s “gold edge” connectors into the

socket at a 70-degree angle and guide the component side of the SIMM module to face the edge of the board. The module can only fit into the socket one way.

30-pin

SIMM memory modules. Two banks of

1MB

to 32MB. (Refer to Table 4, page 13, for

9, lMB

x 9 or

Step 2Gently press the SIMM module toward the edge of the

board until it snaps into the socket in a vertical position. The module should clip into the locking tabs at each end of the socket. If the pegs do not fit into the holes, the SIMM is probably not inserted fully into the socket.

To remove a SIMM memory module, carefully follow the steps

below:

Step

1 Gently push the edge of the sockets to release the module.

Remove one side of the SIMM module first then the other side, to prevent from breaking the socket. The module should fall back at an angle; then it can be removed from the

socket.

Page 16

Memory Configuration

Memory can be installed using

256KB, 1MB

or 4MB SIMM mod-

ules. The following are all the available memory configurations:

1MB 256Kx9 2MB 4MB 8MB

16MB 20MB 32MB

Table

4: Memory Configurations

256Kx9 256Kx9

lMBx9 lMBx9

4MBx9

lMBx9 4MBx9

4MBx9

----

---lMBx9

----

4MBx9

80486VESA User’s Manual

Page 17

System Speed Change

The

80486VESA speeds to accomodate most DOS applications. On power up, the system will be operating in full speed (factory setting).

You can switch between full and low speeds by toggling the turbo

switch or pressing the keyboard keys.

l Toggling the Turbo Switch

Set the turbo switch to the on position to slow down the system speed

Set the turbo switch to the off position to speed up the system speed.

Pressing the Keyboard Keys

system board can be configured for full or low

Note: Before the

turbo switch

using

the keyboard

has

to be set to the off position.

keys

control

the system speed,

Press the < CTRL > < ALT > keys while simultaneously pressing the

Press the pressing the

< - >

key to slow down the system speed.

CTRL > < ALT > keys while simultaneously

+ > key to speed up the system speed.

Memory Caching

The

80486VESA external cache memory. The internal and external cache enable/ disable selections in the BIOS Advanced CMOS Setup program, will turn ON or OFF, either the external memory cache.

80486VESA User’s Manual

system board provides an optional 64/128/256KB

80486VESA’s

8K internal cache or

Page 18

BIOS Setup and Diagnostics

Software Setup

After hardware configuration of the 80486VESA system board is completed, and system hardware has been assembled, the completed system may be powered-up. At this point, software setup should be run to ensure that the system information is correct.

The System Setup is sometimes called CMOS Setup or Standard Setup. Normally, system setup is needed when the system hardware is not identical with the information contained in the CMOS RAM, or whenever the CMOS RAM has lost power.

Running AM1 BIOS

When the system is powered on, the BIOS will enter the Power-On Self Test (POST) routines. These routines are divided into two

phases:

System Test and Initialization (test and initialize system boards for normal operations)

System Configuration Verification (compare defined configuration with hardware actually installed)

The

AMI

BIOS performs the various diagnostic checks at the time the system is powered up; if an error is encountered, the error will be reported in one of two different ways. If the error occurs before the display device is initialized, a series of beeps will be

transmitted (See Appendix C).

80486 VESA User’s Manual

Page 19

Page 20

Page 21

Chapter 4: BIOS Setup and Diagnostics

F6: Loads all features in the Advanced CMOS Setup with the BIOS

Setup defaults.

F7:

Loads all features in the Advanced CMOS Setup with the

Power-On defaults. F10:

Saves all changes made to Setup and exits program

80486VESA User's

Manual

Page 22

Standard CMOS Setup

Standard CMOS Setup is the first option on the main setup menu

Press <ENTER> at the highlighted selection to access this option.

The screen in Figure 4 will appear.

BIOS Setup Program -Standard

Date

(mm/date/year):

Time

(hour/min/sec): 09:39:06

Daylight Saving: Disabled

Hard disk

Hard

Floppy drive A:

Floppy drive B: Primary display Keyboard

Month: Jan,Feb ,......... Dec

Date: 01,02,03 . . 31 Year:

C:type:47

disk

D:type :Not

1901,1902.....2099

Esc = Exit,

Tue

= USER TYPE

Installed

:1.2MB,5.1/4”

:Not

Installed :Monochrome :Installed

t+d,?

Megatrends

Jan

= Select,

1991

F2/F3:

CMOS SET

Inc., All

Cyln 642

8 0

Color,

Rights Reserved

Base memory: Ext. memory: OKB

Head

WPCom LZone Sect

PgUp/PgDn =

640KB

Modify

Figure 4: The Standard CMOS Setup Screen

The standard CMOS Setup utility is used to configure the following features:

Size

43MB

l Set Date: Month, Date, Year. Ranges for each value

are listed below in prompt box in the lower left corner of the CMOS Setup Screen.

80486VESA User’s Manual

Page 23

Chapter 4: BIOS Setup and Diagnostics

Set Time: Hour, Minute, and Second. Uses 24 hour clock format (for PM numbers add 12 to the hour; you would enter

4:30 p.m

16:30:00). Daylight Savings: Disabled or Enabled. Hard Disk C: and Hard Disk D: Hard disk types from 1 to 46

are standard ones; type 47 is user definable. You must enter the hard disk parameters for each drive.

Floppy Drive A and Floppy Drive B: The options are 360KB

5 l/4”,

1.2MB

5 l/4”, 720KB 3 l/2”,

1.44MB

3 l/2”, and Not Installed. Not Installed could be used as an option for diskless workstations.

Primary Display: Options are Monochrome, Color 40x25, VGA/PGA/EGA. Color 80x25, and Not Installed. The Not Installed option could be used for network file servers.

Keyboard: Options are Installed or Not Installed.

“Not Installed” is available for use as an option. This option could be used for diskless workstations and SCSI hard disks. Type 47 may be used for both disks C: and D:. The parameters for type 47 under Hard Disk C: and Hard Disk D: may be different, which effectively allows 2 different user definable hard disk types.

80486VESA User’s Manual

---

Page 24

l Type: This is the number designation for a

identification parameters.

drive

with certain

l Cyl: This is number of cylinders found in

the specified

drive

ty pe

l Heads: This is the number of heads found in

the

specified

drive type.

l WPcom: WPcom is the read delay circuitry which

takes

into account the timing differences between the inner and outer edges of the surface of the disk platter. The number designates the starting cylinder of the signal.

l L-Zone: LZone is the landing zones of

the

heads. This number determines the cylinder location where the heads will normally park when the system is shut down.

l Capacity: This is the formatted capacity of the drive based on

the following formula:

(# of heads) x (# of cylinders) x (# of sectors) x (512 bytes/sec)

80486VESA

User’s Manual

Page 25

Chapter 4: BIOS Setup and Diagnostics

The following warning message, shown in Figure 5, is displayed each time when either the Standard CMOS Setup or Advanced CMOS Setup is selected, before any changes are allowed to any of the setup parameters.

Improper Use of Setup may Cause

System

Hangs,

(ii) Load BIOS Setup Defaults

(iii) Load Power-On Defaults

lit <ESC> to Stop now, Any other Key to Continue

. . . . . .

..Enter

Setup by pressing the <DEL> key

Do any of the following After Entering Setup

(i) Alter Options to make System Work

Figure 5: BIOS Setup Warning

Problems

message

Page 26

Advanced CMOS Setup

Chapter 4: BIOS

Setup

and Diagnostics

The Advanced CMOS Setup contains the setup of features and the

SiS-460

chipset’s configuration registers, to

the

system

help

you achieve an optimum operational environment. From the following menu, highlight the Advanced CMOS Setup

option and press <ENTER>:

Auto, Configuration With

Standard

PROGRAM AMI

Megatrends

Auto Configuration With BIOS

Hard Disk

CMOS

Setup for Changing

Disk Type, etc.

BIOS Inc., All

Power-On Defaults

Utility

SETUP UTILI T

Rights Reserved

Defaults

Time,

Date,

IES

Hard

Page 27

Chapter 4: BIOS Setup and Diagnostics

Advanced CMOS Features

The Advanced CMOS Setup program has several help screens,

accessed by the for a particular feature and special help for some of the options. The following table lists the features and toptions available for each.

<Fl>

key, which will display the options available

Available

Options

Disabled (default) Enabled 0300 (default)

DOS 1 KB

Enabled (default) Disabled

W/S

(default)

MH z

(40

MHz

MHz)

(25/20

MI z

(50/40/33 MH

Enabled

Disabled Enabled (default) Disabled Disabled (default) Enabled Disabled (default) Enabled Disabled (default) Enabled

Disabled (default)

Enabled

Disabled (default)

Enabled

Enabled (default)

Disabled Slowest (50 Slower

Faster (33 MH z

Fastest (25/2O

lT(25/20

2T (50/40/33 MH z

0 w/s

Page 28

‘Cache Write

‘Cache Read

‘Bus Clock

Video Cacheable Option:

Bios

Cacheable

Slow CPU

Cycle Option

Frequency, Select

Option

Below

[25MHz]

2T(25/20 MHz)

3T(50/10/33

1T(25/20 MHz, 256KB 2T(50/40 Cache)

7.15 Ml

I /4 CLK (33 MH

1/5 1/6 Enabled (default) Disabled Enabled Disabled Disabled (25/33/40/50 Enabled

Note:

Features marked with * are set by BIOS

Config Function” is enabled.

MHz

Cache)

MHZ, 33

CLK

(20/40

CLK (25/50

(default)

(20

MH z)

automatically

MHz w/64KB or

MHz

w/128KB

MHz)

if “Auto

When Auto Config Function is enabled, the detect CPU type, CPU frequency

up the optimal parameters to help your system achieve an optimum

and

and reliable operation environment. To set the parameter to meet your requirement, the Auto

Config

BIOS

will automatically

number of cache banks to set

you

want

Function has to be

disabled. “Hard Disk Type 47 RAM Area”

If the BIOS Shadow RAM is disabled, the Hard Disk Type 47 parameter table will use regular RAM. There are two options,

1KB (the top 1KB of the

“Adapter ROM Shadow” you have expansion cards with ROMs on them, you will need to

0:300

(lower system RAM) and DOS

640K

base memory).

is for shadowing other adapter ROMs. If

know

the ROM addresses. After

you have made your selection within the advanced CMOS Setup.

press <ESC> to return to the main menu.

80486VESA User’s Manual

Page 29

Auto Configuration with BIOS Defaults

The “Auto Configuration with BIOS Defaults” loads the default system

values

directly from ROM.

From the following menu

and press <ENTER>

BIOS

setup

(C)

1990 American Megatrends

Auto Configuration With rower-011

Load

BIOS Setup Defaults Values from ROM

Load

BIOS

Setup

ESC:Exit t-+L?:

Figure 8: Auto Configuration

highlight the feature from the main

PROGRAM

Standard CMOS Setup

Advanced CMOS

Default Values for Advanced CMOS and

Select

AMI

Inc., All

F2/F9:

BIOS SE7 UP

Setup

Color

BIOS Defaults Menu

UTILITIES

Rights Reserved

Defaults

Table

F10:Save &

(Y/N)?

Chipset

Exit

80486VESA User’s Manual

Page 30

Auto Configuration with Power-On Defaults

The “Auto Configuration with Power-On Defaults” loads

the settings detected when you turn on the computer. If your svstem behaves erractically, you can use this feature to check for

incorrect settings.

From the following menu, highlight the feature from

the

main

menu and press <ENTER>.

BIOS

SETUP

Load Power-On Default Values for Advanced CMOS and Chipset

(C)

Load Power-011 Default Values from ROM

ESC:Exit

Figure 9: Auto Configuration

PROGRAM

1990 American

Standard CMOS Setup

Auto Configuration With BIOS Defaults

c++lt:

Advanced CMOS Setup

Select

AMI

BIOS SETUP

Megatrends Inc.,

F2/F9:

Color

F10:Save &

w/ Power-On

UTILITIES

Table

(Y/N)?

Exit

Defaults

Hard Disk Utility

The “Hard Disk Utility” is basic drive setup software. All of the options are destructive to data existing on a disk drive. The options are used for low-level formatting before using the DOS “FDISK”

and “FORMAT”, or similiar utilities.

Page 31

Chapter 4: BIOS Setup and Diagnostics

Write to CMOS and Exit/Do not Exit

After completion of all selections, move the cursor down to either “Write to CMOS and Exit” or “Do not Write to CMOS and Exit” to save the data/values changed, or to abandon all the changes and continue with the booting process.

From the following menu, highlight the option and press

<ENTER>.

Standard CMOS Setup

Auto Configuration With BIOS Defaults

Auto

Advanced CMOS Setup

Configuration With Power-On Defaults

ESC:Exit td7‘:

10:

Figure

Write to CMOS and Exit (Y/N)?

Select F2/F9: Color F10:Save & Exit

Write to CMOS/Do not Write to CMOS

Page 32

Appendix A

Disk Drive Types

1 2

4 5 6 7 8

10 11 12

13 14 16 17 18 19

20 21 22 23 24 25 26 27 28 29 30 31 32

125 300 615 300 512 512 940 65535 6 15 256 65535 733 65535 65535 828 65535 65535 855

128 65535

0 300 977

65535 512

300 732 300 300 733 0 0 65535 754 65535 256 65535 918 6 5 5

65535

305

1 5

940

511

981

855

319 733 663

977

1024

732

336 925

925

754

699 823 918

1024

17 17 17 17 17

17 I7 17

I7 17 17 17

17 17

17 I7 17

17 17

I7 I7 I7

17 17

I7 17 17 I7

Page 33

Disk Drive Types (Cont.)

Appendix A

1024

612

1024

1024 615

987

987 820 977 981 830 830 9

I 7

1224

5 2 9 8 8 3 7 6 5

15 15

1024 128 65535

512 128

987 987

820 977 981 512 65535 65535 65535

1024 612 1024

1024 615 987 987 820 977 981 830 830 918

1223

17 17 17 17 17 17 17 17 17

17 17 17 17 17

43MB

10MB 77MB 68MR 41MB 25MB 57MB 41MB 41MB 41MB

48M

69MB

114MB 152MB

Page 34

Appendix

Specifications

Memory:

Up to 32MB of 32 bit RAM

Expansion Slots:

Two 32-bit VL-Bus, two S-bit ISA bus and four slots.

Keyboard Support:

Enhanced AT keyboard

Size:

8.6 inches by 10 inches

Processor:

Intel 80486DX 33/50 MHz Intel 80486SX Intel 80486 Over Drive

20/25

MHz / Intel 80487SX

Intel 80486DX2

/ P24T /

486SX-PQFP / 486DX-PQFP

50/66

20/25

16-bit

MHz

Appendix

ISA bus

Co-Processor:

Internal enhanced numeric coprocessor 486 Over Drive,

Cache Controller:

Internal 8K byte of cache memory (Four-way set associative) Support for 64/128/256Kbyte external cache memory (Direct mapped, Write-back)

BIOS:

AMI (American Megatrends, Inc.)

Environment:

Operating Temperature: 10 degrees C to 40 degrees C. Required Airflow: 50 linear feet per min. across 80486 Humidity: 0 to 90% noncondensing Altitude: 0 to 10,000 feet above sea level

P24T)

(486DX,

80486VESA User’s Manual

486DX2,487SX,

Page 35

System Requirements

Power Supplies for 486 Computers

A clean steady power source is necessary to get reliable performance from the system. With the high clock speeds of the CPU (running at becomes meet the standards required by the CPU, however some have been found to be out of specification. by your system, be sure your power supply provicies a voltage range of 5.25 volts maximum to 4.95 volts minimum.

20MH z

even

or above) the quality of the power

more important. Most

To be certain of the highest performance

power

supplies on the market

supply

In areas line noise filter between the power and the computer.

with

noisy power transmission, we suggest the use of a

80486VESA User’s Manual 33

Page 36

Appendix C

Troubleshooting

The POST (power-on self test) performs

the time the system is powered ON. Whenever an error is countered during these tests, either you hear a see an error displayed on the screen.

Non-fatal errors are those which, in most cases,

to continue the boot appear

Fatal the boot up procedure. If with

These fatal errors are usually communicated through a series

audible beeps. The numbers on correspond to the number of beeps for the corresponding error. The following error messages are conveyed through a number of short beeps; you can always identify the error by counting the

number of short beeps.

the screen.

errors are those which will not allow

your system manufacturer for possible repairs.

OF BEEPS

process. The error messages normallv

fatal error occurs,

the

MEANING OF ERROR

Refresh Failure refresh circuitry of is faulty. Parity Error - A parity error was detected in the base mrmnry (the first block of 64

various

fatal error list below

KB)

diagnostic

few

short

allow

the system

the

svstcm to continue

you

should consult

The memory

the

motherboard

of the system.

tests at

en-

beeps

80486VESA

User’s Manual

Page 37

Appendix C

Base 64KB Memory Failure - A memory

failure occurred within the first 64 KB of memory. Timer Not Operational

Timer #l on the

motherboard has failed to function properly. Processor Error

The CPU on the motherboard

has generated an error.

8042-Gate A20 Failure

The keyboard controller (8042) contains the Gate A20 switch which allows the CPU to operate in virtual mode. This error message means that the BIOS is not ahle to switch the

CPU into protected mode.

Processor Exception Interrupt Error

the motherboard has generated an exception

The CPU

interrupt.

Display Memory Read/Write Error - The system

video adapter is either missing or its memory is

faulty.

ROM Checksum Error -

value CMOS Shutdown Register Read/Write Error

The

Note: This

not

a fatal error.

The

ROM checksum

does not match the value encoded in the BIOS.

shutdown register for the CMOS memory has

failed.

Page 38

Appendix C

Non-Fatal BIOS Error Messages

If a non-fatal error occurs during the POST routines performed each time the system is powered on, the error message

on the screen in the following format:

will appear

ERROR Message

Line

ERROR Message Line 2

press

<Fl>

to RESUME

Write down the error message and press the <Fl> key to continue

with the boot-up procedure.

For

most of the error messages, you will not Message Line 2.” “ERROR Message Line

UTILITY”. Pressing the

Generally,

2”,

the message will be “RUN SETUP

<Fl>

for those messages containing an

key will invoke

Program. The following are descriptions of

l 8042 Gate A20 Error

The gate-A20 portion of the keyboard

controller (8042) has failed to operate correctly. The

see

"ERROR

the BIOS Setup

the

error

messages.

8042

chip

should be replaced.

l Address Line Short

An error has occurred in the address

decoding circuitry of the motherboard

l Cache Memory Bad, Do Not Enable Cache

found the cache memory of the motherboard to be

Consult your system manufacturer to

l CH-2 Timer Error

two timers. An error with tinier #l is a fatal

on page 34.

message

If an error occurs with tinier

appears.

Most AT standard

repair

! -

The BIOS

has

defective.

the problem.

motherboards include

error, explained

#2,

this

error

Page 39

Appendix C

l C: Drive Error

The BIOS is not receiving any response from

hard disk C:. It may be necessary to run the Hard Disk Utility to correct this problem. Also, check the type of hard disk selected in the Standard CMOS Setup of the BIOS Setup Program to see if the correct hard disk drive has been selected.

l C: Drive Failure

The BIOS can not get any response

from the hard disk drive C:. It may be necessary to replace the

hard disk.

l CMOS Battery State Low

There is a battery in your system

which is used for storing the CMOS values. This battery appears to be low in power and needs to be replaced.

l CMOS Checksum Failure

After the CMOS values are saved,

a checksum value is generated to provide for error checking. If

the previous value is different from the value currently read, this error message appears. To correct this error, you should run

BIOS

Setup Program.

l CMOS Display Type Mismatch - The type of

video

stored in

CMOS does not match the type detected by the BIOS. Run the

BIOS Setup Program to correct this error.

l CMOS Memory Size Mismatch

amount of memory on your motherboard to be different

If the BIOS finds the

from the amount stored in CMOS, this error message is generated. Run the

BIOS

Setup Program to correct this error.

. CMOS System Options Not Set

The values stored in the

CMOS arc either corrupt or nonexistent. Run

Program

l CMOS Time

Setup

correct this error.

Date Not Set - Run the

the

BIOS SETUP

Standard

Program to set the

the CMOS

the

BIOS Setup

CMOS

date

and

time of

Page 40

Drive Error - The BIOS is not receiving any response from

hard disk D:. It may be necessary to run the I

correct this problem. Also, check the type of hard disk

Hard

Disk Utility

selected in the Standard CMOS Setup of the BIOS Setup Program to see if the correct hard disk

drive

has been selected.

D: Drive Failure

The BIOS can not get

any

response from the hard disk drive D:. It may be necessary to replace the hard disk.

Diskette Boot Failure

The diskette used to boot-up in

floppy drive A: is corrupt, which means you can not use it to boot-up the system. Use another boot diskette and follow the

instructions on the screen. Display Switch Not Proper

Some systems require that a video switch on the motherboard be set to either color or monochrome, depending upon the type of video you are using. To correct this situation, set the switch properly. (Remember

shut down the system first).

DMA #1 Error - An error has occurred with the first DMA channel on the motherboard.

DMA

Error - An error has occurred with the second

DMA channel on the motherboard. DMA Error

An error has occurred with the DMA controller

on the motherboard. FDD Controller Failure

The BIOS is not able to

comnuni-

cate with the floppy disk drive controller. Check all appropriate connections after the system is powered off.

HDD Controller Failure

The BIOS is not able to communicate with the hard disk drive controller. connections after the system is powered off.

80586VESA User’s Manual

Check

all appropriate

Page 41

Appendix C

l C: Drive Failure

The BIOS can not get any response from the hard disk drive C:. It may be necessary to replace the hard disk.

l D: Drive Failure

The BIOS can not get any response from the hard disk drive D:. It may be necessary to replace the hard disk.

l CMOS Time

Date Not Set - Run the Standard CMOS

Setup of the BIOS SETUP Program to set the date and time of the CMOS.

l Cache Memory Bad, Do Not Enable Cache

! -

The BIOS has

found the cache memory of the motherboard to be defective.

Consult your system manufacturer to repair the problem.

l INTR #l Error

The interrupt channel #l has failed the

POST routine.

l INTR

Error - The interrupt channel #2 has failed the POST

routine.

l Invalid Boot Diskette

The BIOS can read the diskette in floppy drive A:, but it can not boot-up the system with it. Use another boot diskette and follow the instructions on the screen.

l KB/Interface Error

The BIOS has found an error with the

keyboard connector on the motherboard.

l Keyboard Error

with the keyboard. Make sure you have an

The BIOS has encountered a timing problem

AMI

Keyboard

BIOS installed in your system. You may also set the

“Keyboard” option in the Standard CMOS Setup to “Not Installed”, which will cause the BIOS to skip the keyboard

POST routines.

80486VESA User’s Manual 39

Page 42

l Keyboard is Locked...Unlock It

The

keyboard lock on the system is engaged. The system must be unlocked to continue the boot up procedure.

l No ROM BASIC

This error occurs when a proper bootable

sector cannot be found on either the floppy diskette drive A: or the hard disk drive C:. The BIOS will trv at this point

ROM Basic, and the error message will be generated when

BIOS does not find it.

l Off Board Parity Error

The BIOS has encountered a parity

error with some memory installed in an I/O bus expansion

slot. The message will appear as follows:

OFF BOARD PARITY ERROR ADDR (HEX) = (XXXX)

where XXXX is the address (in hexadecimal) at which has occurred. “Off Board” means that it is part of the

the error

memory installed on an expansion card in an I/O bus expansion slot, as opposed to memory attached directly to the motherboard.

l On Board Parity Error -The

error with some memory installed on

BIOS

has encountered a

the

motherboard.

parity

The

message will appear as follows:

ON BOARD PARITY ERROR

ADDR (I

= (XXXX)

run

the

where XXXX is the address (in hexadecimal) at which has occurred.

“On

Board” means that it is part of the memory

the error

attached directly to the motherboard, as opposed to memory installed on an expansion card in an I/O

l Parity Error ????

The BIOS has

encountered

error with some memory in the system, but it is not

bus

expansion slot.

a paritv

able

determine the address of the error.

Page 43

Appendix

Appendix D

Warranty Information

Your 80486VESA system board comes with a limited one-year warranty. The manufacturer warrants this product against defects

in material and workmanship for one (1) year from date of purchase. Defective parts will be exchanged or repaired at the manufacturer’s option, for one (1) year after date of original purchase.

Service can be obtained by calling the manufacturer for a Return

Merchandise Authorization (RMA) number. A receipt or copy of

invoice with date of purchase is also required before any warranty service will be rendered. Write the RMA number legibly on the outside of the shipping carton and mail prepaid or hand carry to

the manufacturer. Shipping and handling charges will be applied

for all orders that have to be mailed when service is complete.

This warranty covers normal consumer use and does not cover damages incurred in shipping or failure due to abuse, misuse, or misapplication, nor as a result of service or modification other than by the manufacturer.

80486VESA

User’s Manual