VESA 80486VESA User Manual

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Part No. 03-0023X-00

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1992

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manual

and

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accompanying documentation and to make

changes in the

content

without obligation

to notify

any

person or organization of

the

revision

change.

IN NO EVENT

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LIABLE FOR DIRECT

INDIRECT,

SPECIAL

INCIDENTAL., OR CONSEQUENTIAl.

DAMAGES

ARISING OUT OF

THE

USE OR

INABILITY

TO USE

THIS PRODUCT OR DOCUMENTATION, EVEN

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THE POSSIBILITY

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TH E

VENDOR

SHALL

NOT

HAVE

LIABILITY FOR ANY

HARDWARE, SOFTWARE, OR DATA STORED OR

USED WITH

PRODUCT, INCLUDJNG

THE

COSTS OF

REPAIRING,

REPLACING, OR RECOVERING

SUCH

HARDWARE,

SOFTWARE,

DATA.

IBM

is a

registered trademark

of International Business

Machines

AMI

is a registered

trademark

of American

Megatrends

Inc.

Intel

is a

registered trademark

of Intel Corporation

80486 is a

registered reademark

Intel

Corporation

VESA VL-Bus is a registered

trademark of Video

Electronics Standard

Association.

Page 3

Table Of Contents

Chapter 1

Introduction

What is

VESA VL-Bus?

Advantages

VESA VL.-Bus 80486VESA Motherboard Overview 80486VESA Features Performance Report

Chapter 2

Configuration

and

Layout Connector and Jumper Settings CPU Selection Cache Memory

Configuration

VESA

VL-Bus Identifier

Motherboard

Diagram

Chapter 3

Installation and Operation

Before

You

begin

Installing

The

SIMM Modules

Memory Configuration

System Speed Change

Memory Caching

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

VL-Bus is a proposal from

the

Video

Electronics

Standard Association committee. The

architecture

of the

VL-Bus generally follows the 486 CPU local bus. Additional hardware functions

are added to accommodate VL-Bus master devices

and

intrractinn

with

the system I/O bus. The

VL-bus

extends

the

capabilities of the

16-bit

ISA bus to

32-bus

architecture and up to

100Mb/sec (at 50

MHz data transfer rate, while maintaining

compatibility with

ISA

add-on

boards.

Advantage of VESA VL-Bus

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

board

design 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.

Included 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

64KB, 128KB,

and

256KB of external cache. Because of its unique memory subsystem design, the 80486VESA

allows for 1 Megabyte to 32 Megabytes of 32-bit high speed memory by using

256KB, 1MB,

and/or 4MB SIMM

modules.

80486VESA

User’s Manual

Page 6

Chapter

Introduction

80486VESA Features

l Intel 80486 microprocessor

KBytes static

RAM with four-way set associative internal cache

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

487SX,

486SX2)

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

8-bit

ISA bus and four 16-bit ISA

bus

slots

l Fast A20 implementation to speed-up multitasking operating

system

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

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

MHz

(Ver. 1.14)

11.136 MIPS (Ver. 1.3)

: 151.9

MHz

(Ver. 1.14)

14.819 MIPS (Ver. 1.3)

: 200 +

MHz

(Ver. 1.14)

: 22.271 MIPS (Ver. 1.3)

80486VESA User’s Manual

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,

JP1O)

for the 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

(JP14)

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#

Assignment

Ground

Reset Strobe

Front Panel Turbo Connector

(JP15)

Connector

JP15

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

connector for the “Turbo” processor speed which can allow you

switch between system speeds. (Please refer to Chapter 3 “Installation

Operation” for a detailed description on speed

switching procedures). The pin assignments are:

80486VESA

User’s

Manual

Page 8

JPl5 Pin#

Assignment

Ground

Turbo Control

Front Panel Turbo LED Connector

(JP16)

Connector JP16 is a

2-pin

single in-line

BERG

strip. It

can be

connected to an LED display indicating the CPU speed.

The display lights up when the CPU is running at full speed (Please refer to Chapter 3 “Installation

Operation”

for more information

about speed change). The pin assignments arc:

JP16

Pin#

Assignment

Front Panel Keylock and Power LED Connector

(JP18)

Connector

JP18

is a 5-pin single in-line

BERG

strip which

provides

for the front panel keylock and power LED connection

When

connected to a lock on your system

case you can

enable or

disable

the keyboard by switching

the key.

The pin

assignments are:

Page 9

Chapter 2: Configuration and Layout

Front Panel Speaker Connector (JP17)

Connector

JP17

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

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

JP17

Pin#

Assignment

speaker data

N. C.

ground

Power Supply Connector

(PW1)

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

PWl

Pin#

Assienment

power good

VDC

+12

VDC

-12 VDC

ground

-5VDC

+5VDC

Page 10

Chapter 2: Configuration and

Layout

External Battery

(JPl)

The 80486VESA motherboard provides one

external

battery

supply connector. The pin assignments are:

JP1 Pin#

Assignment

Battery Positive

No Connection

Ground

Monitor Type

(JP2)

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:

JP2

Pin#

Function

1&2

(Closed)

l&2

(Open)

Monochrome Monitor Color Monitor

Keyboard Connector

(KBl)

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#

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/DX-PQFP

1-2,3-4

l-2 Close Open

486SX

2-3

Open Open Close

486DX/486DX2

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

486 Over Drive 168-pin 487SX/487SX2

486 Over Drive 169-pin

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

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

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

2-3 Open Close

P24T

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

33 MHz Close

25 MHz Open

Close 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:

64K

Open

128K

1-2

256K 2-3

Open Close Close

Note:

Table 3: Cache Memory Configurations

For 64K

cadre,

install 8Kx8 SRAM in locations

1143,

U34,

1135,

U36, U37, U39,

U40,

U41,

and

U42.

For 128K

cache,

install 8Kx8

SRAM

locations

1143,

and 32Kx8

SRAM in locations U34, U35, U36,

and

U37.

For 256K

cache install

32Kx8 SRAM in

locations

U43,

U34,

U35, U36, U37, U39,

U40, U41,

and U42.

VESA VL-Bus Identifier Jumpers

(JP19,

JP20)

The identifier jumpers (JP19,

JP20)

allow VL-Bus slave to identify

the speed of the host CPU.

0 wait write min.

1 wait write min.

Open Close

<=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

should

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

(e.g.

anti-static

pads). If nothing is available, touch the power supply

hous

ing. This assumes the system unit is plugged in

and ground

ing

the case. De certain to do this

before removing

components from their anti-static

coverings

*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

into the expan-

sion bus. It is best to handle them either

their edges or by mounting brackets that attach to the slot opening in the system cases.

Iowever, the above recommendations arc just

intended to advise reasonable care to

avoid

the static dis-

charge problems.

l Make certain that everything that

connects to

the system case,

including the power supply,

unplugged

before doing the in-

stallation work.

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

30-pin

SIMM memory modules. Two banks of

SIMM modules are available for use with 256KB x

9, lMB

x 9 or

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

1MB

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

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.

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

256Kx9 256Kx9

4MB

lMBx9

----

8MB

lMBx9

16MB

4MBx9

----

20MB

lMBx9 4MBx9

32MB

4MBx9

Table

4: Memory Configurations

80486VESA User’s Manual

Page 17

System Speed Change

The

80486VESA

system board can be configured for full or low 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

Note: Before

using

the keyboard

keys

control

the system speed,

the

turbo switch

has

to be set to the off position.

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

< - >

key to slow down the system speed.

Press the

CTRL > < ALT > keys while simultaneously

pressing the

+ > key to speed up the system speed.

Memory Caching

The

80486VESA

system board provides an optional 64/128/256KB 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

80486VESA’s

8K internal cache or

external memory cache.

80486VESA User’s Manual

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

CMOS SET

Megatrends

Inc., All

Rights Reserved

Date

(mm/date/year):

Tue

Jan

1991

Time

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

Daylight Saving: Disabled

Base memory:

640KB

Ext. memory: OKB

Hard disk

C:type:47

= USER TYPE

Cyln

Head

WPCom LZone Sect

Size

642

8 0

43MB

Hard

disk

D:type :Not

Installed

Floppy drive A:

:1.2MB,5.1/4”

Floppy drive B:

:Not

Installed

Primary display

:Monochrome

Keyboard

:Installed

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

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

1901,1902.....2099

Esc = Exit,

t+d,?

= Select,

F2/F3:

Color,

PgUp/PgDn =

Modify

Figure 4: The Standard CMOS Setup Screen

The standard CMOS Setup utility is used to configure the

following features:

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

drive

with certain

identification parameters.

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

Problems

System

Hangs,

. . . . . .

..Enter

Setup by pressing the <DEL> key

Do any of the following After Entering Setup

(i) Alter Options to make System Work

(ii) Load BIOS Setup Defaults

(iii) Load Power-On Defaults

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

Figure 5: BIOS Setup Warning

message

Page 26

Chapter 4: BIOS

Setup

and Diagnostics

Advanced CMOS Setup

The Advanced CMOS Setup contains the setup of

the

system

features and the

SiS-460

chipset’s configuration registers, to

help

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

option and press <ENTER>:

BIOS SETUP

PROGRAM AMI

BIOS

SETUP UTILI T

IES

Megatrends

Inc., All

Rights Reserved

Auto Configuration With BIOS

Defaults

Auto, Configuration With

Power-On Defaults

Hard Disk

Utility

Standard

CMOS

Setup for Changing

Time,

Date,

Hard

Disk Type, etc.

Page 27

Chapter 4: BIOS Setup and Diagnostics

Advanced CMOS Features

The Advanced CMOS Setup program has several help screens,

accessed by the

<Fl>

key, which will display the options available for a particular feature and special help for some of the options. The following table lists the features and toptions available for each.

Available

Options

Disabled (default) Enabled 0300 (default)

DOS 1 KB

Enabled (default) Disabled Enabled

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

Enabled

Disabled (default) Enabled Disabled (default) Enabled Disabled (default) Enabled Enabled (default) Disabled Slowest (50

MH z

Slower

(40

Faster (33 MH z Fastest (25/2O

MHz

lT(25/20

MHz) 2T (50/40/33 MH z 0 w/s

(25/20

MI z

W/S

(50/40/33 MH

Page 28

‘Cache Write

Cycle Option

‘Cache Read

Cycle Option

‘Bus Clock

Frequency, Select

Video Cacheable Option:

Bios

Cacheable

Option

Slow CPU

Below

[25MHz]

2T(25/20 MHz)

3T(50/10/33

MHz

1T(25/20 MHz,

MHz w/64KB or

256KB

Cache)

2T(50/40

MHZ, 33

MHz

w/128KB

Cache)

7.15 Ml

I /4 CLK (33 MH

1/5

CLK

(20/40

1/6

CLK (25/50

MHz) Enabled (default) Disabled Enabled

(default) Disabled Disabled (25/33/40/50

MHz)

Enabled

(20

MH z)

Note: Features marked with * are set by BIOS

automatically

if “Auto

Config Function” is enabled. When Auto Config Function is enabled, the

BIOS

will automatically

detect CPU type, CPU frequency

and

number of cache banks to set

up the optimal parameters to help your system achieve an optimum

and reliable operation environment. To set the parameter

you

want

to meet your requirement, the Auto

Config

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,

0:300

(lower system RAM) and DOS

1KB (the top 1KB of the

640K

base memory).

“Adapter ROM Shadow”

is for shadowing other adapter ROMs. If

you have expansion cards with ROMs on them, you will need to

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

highlight the feature from the main

and press <ENTER>

BIOS

setup

PROGRAM

AMI

BIOS SE7 UP

UTILITIES

(C)

1990 American Megatrends

Inc., All

Rights Reserved

Standard CMOS Setup

Advanced CMOS

Setup

Auto Configuration With rower-011

Defaults

Load

BIOS Setup Defaults Values from ROM

Table

(Y/N)?

Load

BIOS

Setup

Default Values for Advanced CMOS and

Chipset

ESC:Exit t-+L?:

Select

F2/F9:

Color

F10:Save &

Exit

Figure 8: Auto Configuration

BIOS Defaults Menu

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

PROGRAM

AMI

BIOS SETUP

UTILITIES

(C)

1990 American

Megatrends Inc.,

Standard CMOS Setup Advanced CMOS Setup

Auto Configuration With BIOS Defaults

Load Power-011 Default Values from ROM

Table

(Y/N)?

Load Power-On Default Values for Advanced CMOS and Chipset

ESC:Exit

c++lt:

Select

F2/F9:

Color

F10:Save &

Exit

Figure 9: Auto Configuration

w/ Power-On

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

Advanced CMOS Setup

Auto Configuration With BIOS Defaults

Auto

Configuration With Power-On Defaults

Write to CMOS and Exit (Y/N)?

ESC:Exit td7‘:

Select F2/F9: Color F10:Save & Exit

Figure

10:

Write to CMOS/Do not Write to CMOS

Page 32

Appendix A

Disk Drive Types

1 2 3 4 5 6 7 8

19 20 21 22 23 24

27 28

29 30

125

305

300 615

300

1 5

512

940

512 940

65535 6 15

256

511

65535 733

65535

981

65535 828

65535

855

65535 855

128

319

65535

733

663

300 977

65535

977

512

1024

300 732

300

732

300 733

336

925

65535

925

754

65535

754

256

699

65535

823

918

6 5 5

1024

65535

1024

Page 33

Appendix A

Disk Drive Types (Cont.)

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

IO 15

1024 128 65535

512 128

987 987 820 977 981 512 65535 65535 65535

1024

612

1024

615

987

820

977

981

830

918

1223

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

16-bit

ISA bus

slots.

Keyboard Support:

Enhanced AT keyboard

Size:

8.6 inches by 10 inches

Processor:

Intel 80486DX 33/50 MHz

Intel 80486DX2

50/66

MHz

Intel 80486SX

20/25

MHz / Intel 80487SX

20/25

MHz

Intel 80486 Over Drive

/ P24T /

486SX-PQFP / 486DX-PQFP

Co-Processor:

Internal enhanced numeric coprocessor

(486DX,

486DX2,487SX,

486 Over Drive,

P24T)

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

80486VESA User’s Manual

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

20MH z

or above) the quality of the power

supply

becomes

even

more important. Most

power

supplies on the market meet the standards required by the CPU, however some have been found to be out of specification.

To be certain of the highest performance

by your system, be sure your power supply provicies a voltage

range of 5.25 volts maximum to 4.95 volts minimum. In areas

with

noisy power transmission, we suggest the use of a

line noise filter between the power and the computer.

80486VESA User’s Manual 33

Page 36

Appendix C

Troubleshooting

The POST (power-on self test) performs

various

diagnostic

tests at

the time the system is powered ON. Whenever an error is

en-

countered during these tests, either you hear a

few

short

beeps

see an error displayed on the screen. Non-fatal errors are those which, in most cases,

allow

the system

to continue the boot

process. The error messages normallv

appear

the screen.

Fatal

errors are those which will not allow

the

svstcm to continue

the boot up procedure. If

fatal error occurs,

you

should consult

with

your system manufacturer for possible repairs.

These fatal errors are usually communicated through a series

audible beeps. The numbers on

the

fatal error list below 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.

OF BEEPS

MEANING OF ERROR

Refresh Failure

The memory

refresh circuitry of

the

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

KB)

of the system.

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 CPU

the motherboard has generated an exception

interrupt.

Display Memory Read/Write Error - The system

video adapter is either missing or its memory is

faulty.

Note: This

not

a fatal error.

ROM Checksum Error -

The

ROM checksum

value

does not match the value encoded in the BIOS.

CMOS Shutdown Register Read/Write Error

The

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

will appear

on the screen in the following format:

ERROR Message

Line

1 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

see

"ERROR

Message Line 2.”

Generally,

for those messages containing an

“ERROR Message Line

2”,

the message will be “RUN SETUP

UTILITY”. Pressing the

<Fl>

key will invoke

the BIOS Setup

Program. The following are descriptions of

the

error

messages.

l 8042 Gate A20 Error

The gate-A20 portion of the keyboard

controller (8042) has failed to operate correctly. The

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

! -

The BIOS

has

found the cache memory of the motherboard to be

defective.

Consult your system manufacturer to

repair

the problem.

l CH-2 Timer Error

Most AT standard

motherboards include

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

error, explained

on page 34.

If an error occurs with tinier

#2,

this

error

message

appears.

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

If the BIOS finds the

amount of memory on your motherboard to be different

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

the

BIOS Setup

Program

correct this error.

l CMOS Time

Date Not Set - Run the

Standard

CMOS

Setup

the

BIOS SETUP

Program to set the

date

and

time of

the CMOS

Page 40

Drive Error - The BIOS is not receiving any response from

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

Hard

Disk Utility

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.

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 communi-

cate with the hard disk drive controller.

Check

all appropriate

connections after the system is powered off.

80586VESA User’s Manual

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

The BIOS has encountered a timing problem

with the keyboard. Make sure you have an

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

run

ROM Basic, and the error message will be generated when

the

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

the error

has occurred. “Off Board” means that it is part of the

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

BIOS

has encountered a

parity

error with some memory installed on

the

motherboard.

The

message will appear as follows:

ON BOARD PARITY ERROR ADDR (I

= (XXXX)

where XXXX is the address (in hexadecimal) at which

the error

has occurred.

“On

Board” means that it is part of the memory attached directly to the motherboard, as opposed to memory installed on an expansion card in an I/O

bus

expansion slot.

l Parity Error ????

The BIOS has

encountered

a paritv

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

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 pur-

chase. 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