Chicony CH-486-33A User's Manual

CH-486-33A

User’s

Manual

1st Edition, June 1991

The information contained in this manual is

subject to change without notice

__ _ _

_.___ ____________

IBM

PC/XT/AT/PS-2

are registered trademarks of

International Business Machines Corporation.

AMI

is a trademark of American Megatrends, inc.

486 is a trademark of Intel Corporation.

Other brand and product name or trademarks

and/or registered trademarks of respective companies.

Table Of Contents

1. Introduction

2.

Hardware Description

I

System Description

21 22-Connector and Jumper Settings

I

DRAM Bank Configuration

23

-

SRAM Configuration

24

3

BIOS Setup

-

BIOS Overview

31

I

Standard CMOS Setup

32

-

Advanced CMOS Setup

33

-

Advanced

34

I

Auto Configuration with BIOS

35

Defaults. Auto Configuration with Power-On

3-6

Defaults

’

1

-

Write To CMOS and Exit

37

-

I

Do

38

Not Write To CMOS and Exit

Chipset

Setup

1

htroduction

The

CH-486.33A

performance for high-end

CH-486.33A

or INTEL

is a three-chip solution offering optional

486.based

is designed for INTEL

80486SX

running for

AT systems. The

80486DX

20/25MHz

combines three

running 33 MHz

major functions:

x

The

82C493

If

The

tl

The

System Controller

82C392

Data Buffer Contrdler (DBC)

82C206

Integrated Peripheral Controller (IPC)

(sysc)

l-l. CH-486-33A Mainboard Specification

33 MHz INTEL 80486 DX CPU OR

80486 SX CPU ISA architecture Copy-Back Direct-Mapped Cache with size of 64KB or 256 KB selectable

II

Up to 32 MB of local high-speed page-mode DRAM memory space DRAM TYPE support 256K/i Control of two non-cacheable regions

Shadow

Optional Cacheable of shadow video BIOS Turbo/slow speed selectable for hardware and software controller

RAM support

M/4MB

20125

MHz INTEL

Introduction

1-1

WEITEK 4167 coprocessor socket on board On board rechargeable battery back-up for CMOS configuration and real-time dock Optimized for

OS/2,

window/386, window 3.0, XENIX, UNIX software operation Baby AT size, with XT/AT mounting

hole

l-2

lntroductlon

2. Hardware Description

2-l

System Description

80486

Microprocessor

The 80486 is a high performance on-chip memory management, floating point and cache

memory units. It is binary compatible with members of the 86 architectural family. The 486 CPU contains all the features of the 386 CPU with enhancements to increase performance.

On-chip Floating Point Control Unit

The operation of the 486 microprocessor’s on-chip floating

point control unit is exactly the same as the 387 math coprocessor. Software written for the 387 math coprocessor will run on the on-chip floating point unit without any modification. It occupies

8OOOOOFOH-SOOOOOFFH

I/O

and operates in parallel with the arithmetic and logic unit and provides arithmetic instructions for a variety of numeric data types.

On-chip Cache Memory

32.bit

microprocessor with

address range of

The

8KB

on-chip cache is a 4-way set associative write-through code and data cache memory. Individual pages can be designated as cacheable or non-cacheable by software or hardware. The cache can also be enabled and disabled by software or hardware.

Hardware Description

4167 Floating-point Coprocessor

The WEITEK 4167 is a high-performance single-chip floating-point coprocessor for 80486 microprocessor. It is upwardly binary compatible with the WEITEK 3167 coprocessor.

The 4167 coprocessor is a memory-mapped peripheral

communicates with the connects the main memory to CPU. The respond to memory addresses

CIFFFFFFH. Writing to this ;ddrcss space will

to execute this

fractions

coprocessor to drive the

80486

over the

COOOOOOO1:

same address bus tklt

coprocessor

i

through

will

cause the

and reading from it will cause the

data

bus.

2-2 Connector and Jumper Settings

This chapter describes the

CH-486.33A main bo;rrd’s

jumpers

and connectors

The system layout are shown on the next

purge.

that

4

107

Hardware Description

.

JPll

I

WEITEK 4167

1

82c4w

1

DRAMBank

30

DRAMBank

I

J23

324

I

il

Wl

SW2

d

JP12

0

Hardware Description

2-3

SW1

Hardware Reset switch Connector

:

sw2:

.

Jl JlO:

Jll

,

J23: J24:

JP12:

Hardware Turbo Switch Connector

Keyboard Connector

External Battery Connector

J12: Power Connector

Keylock and Power LED Connector

Speaker Connector

Turbo LED Connector

2-4

Hardware Description

Jumper

JPl

JP2

JP4 JPS

JP6

1

Description

Monitor Type Selectable

I

CMOS power

I

CPU selectable

1

Setting

n : Monochrome

1-2

:

Clear CMOS RAM

2-3 : Backup CMOS RAM

I

[Always

1

1-2:

(2-3

13Upen:4BSX

_

.

2-3 Short

-

487SX

:

4860X

I 1

I

1

I

JP7

JP8

Jp9

JPlO JPll

NOTE : 1.

TItose

2. This stepping

CPU selectable

1

Cache

$i28 Sdetctabl8

Cache size selectable

enclosed in box

Mainbmud

mly supput Intel C u

cfpracesscx.

_-.--_-.-.-

ate

Mainboard

[Short : 486

Open : 486 SX Short : 256K

@pen

Short :

IOpen

[Always Open

Short :

IOpen

:

64K

:

64K

:

64K

256K

OX,

487SX

Default

Iater

J

Hardware Description

2-5

2-3. DRAM Bank Configuration

The

CH-486.33A

memory, DRAM devices are either Total memory is between illustrates the configuration supported.

supports 2 banks of

256Kb, 1Mb

1MB

and 32MB. The following table

page

mode local

or 4Mb large.

Bank 0

256K

1 4M

I

lfvl

I

4M

I

4M

*

Use 80ns DRAM

1

Bank 1

I I256K

1M

I

4M

I

lM

4M

I

1

Total

1MB

I 1

2MB

5MB

i8MB

1

16MB

I20MB I2OMB 1

32MB

I I

- -1

I I

2-6

Hardware Description

2-4

SRAM Configuration

The CH-486-33A has a non-pipeline mode with a 16 bytes line size copy-back Direct-mapped cache, because this cache controller design two-way interleave cache read/write, so only support 64K or 256K secondary cache size.

The following table shows the TAG RAM size, cache RAM size

and cacheable main memory size supported by CH-486-33A.

Cache size (KB)

64K

256K

Note : . If

TAG RAM size

8Kx 8bit U34

64K x lbit U33

32K x 8bit U34 32K x 8bit 32MB 64K x 1 bit

you

waut

mrst

change the SRA M

Setthg.

Hardware Description

to

U33

charge

Cache Cacheable main RAM size memory

8K x 8bit u47 “U49

us1 - us5

u47 “U49

us1 - us5

secortd

arid

16MB

Ier~el

cache size,

TAG RAM size

you

aud Jutqw

2-7

3-l.

BIOS OVERVIEW

3.BlOS

SETUP

The SETUP program is used to configure the system. These system options are stored in the CMOS. If the CMOS is good, the system is configured with the values stored in the CMOS. If the CMOS is bad, the system is configured with the default values stored in the ROM file.

There are two (2) sets of BIOS values stored in the ROM file

tl

The BIOS Setup default values

n

The Power-On default values

:

The BIOS Setup default values are the default values which are supposed to give optimum performance for the system. They are the best case default values.

The Power-On default values are the default values for the

table values for the system. They are the worst case default

values.

BIOS SETUP

3-l

There are two ways to enter the BIOS setup program

1. Whenever BIOS detects any equipment error or the CMOS contents are not consistent with the equipment.

2. After the power on memory test, the screen will show:

Hit

<DEL>

Press the DEL key to get the following screen:

If you want to run setup

3-2

BIOS

SETUP

-

AMI

BIOS SETUP UTILITIES

(1990)

American Megatrends Inc., All

Rights

--I

Reserved

STANDARD CMOS SETUP

ADVANCED CMOS SETUP

ADVANCED

CHIPSET

SETUP

AUTO CONFIGURATION WITH BIOS DEFAULTS

AUTO CONFIGURATION WITH POWER-ON DEFAULTS

WRITE TO CMOS AND EXIT

DO NOT WRITE TO CMOS AND EXIT

.

__ _______

___.__ ___ --

Standard CMOS Setup for changing Time, Date, Hard Disk Type, etc.

_~___

L

~~____

ESC:Exit

_.__._ _______ _ ___~_

I- 1

-

____~__

l

-- :

Sel

F2/F3:Color

FlO:Save

---___-

& Exit

_-

Explanation of keys:

FCC:

Arrow keys:

F2/ F3: FlO:

BIOS SETUP

Exit to setup program

Cursor movement Change Color

Save Setup values &

&it

to setup program

3-3

The user is given a warning message before he is allowed to change any of the setup parameters. The warning message is shown as following:

--

BIOS SETUP PROGRAM

Improper Use of Setup may Cause Problems !!

If System Hangs, Reboot System and Enter Setup by pressing the <

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

Hit <

ESC>

to stop now, Any other key to Continue

Figure 3 : BIOS Setup Warning Message

Explanation of keys:

.

ESC

Any*

Exit to previous screen

keys : Continue choose setup program

______- -- --__ _.._-____--_

______________

-WARNING

INFORMATION

-_ .----.- .-.

__

___

.-- __

-_

. _ -_

DEL >

key

-

_.

3-4 BIOS SETUP

3-2 STANDARD CMOS SETUP

This option is used to configure the following options:

Date: Month, Date and Year Time: Hour, Minute and Second

Daylight Saving: Disabled or Enabled Hard Disk C: and Hard Disk D: The user can choose

any of the standard hard disk types from 1 to 46 or he

can choose type 47 which is the user defineable type.

The user must enter the hard disk parameters if he

wants to choose the user-definable hard disk type per drive, i.e., type 47 may be different for drive C: and for drive D:. Floppy drive A: and Floppy drive B: 360KB 5.25,

1.2MB 5.25,

Primary Display: Monochrome, Color 40 x 25,

VGA/PGA/EGA,

Keyboard: Installed or Not Installed

720KB

3.5”, 1.44MB 3.5”,

Color 80x25, Not Installed

Not Installed

BIOS SETUP

3-5

BIOS SETUP PROGRAM-STANDARD CMOS

SEI’UP

-

Date (mm/ date/ year): Wed, Jun 05 1991 lime (hour/ min/

Daylight saving Hard disk C: type: Not Installed Hard disk D: type Floppy drive A Floppy drive B Primary display Key board

Month:Jan,Feb,....Dec

Date

:01,02,03....31

Year

:1901,1902....2099

ESC:Exit -

set):

15 : 35 : 50

:

Disabled

:

Not Installed

:

1.2 MB, 5.25”

:

Not Installed

:

VGA/ PGA/ FGA

:

Installed

.-

--• 1

Select

1

SUN1 MON 1 TUE

F2/

___________. _-_.-.--._- -.---

Base memory: 640 KB

Ext.

memory: 7168 KB

Cyln Head

WPcom

1

WED 1

F3: Color

LZone Sect Size

THU

PU/

PD:Modify

-__- - _ .-- -

1

SAT

3-6

BIOS SETUP

Note: Daylight Saving

The RTC has a built-in capability to automatically adjust the time on the two daylight savings days of the year

(*).

If this is

desired, set the field to “Enable”.

Otherwise, set field to “Disabled”. Note that in general, nothing will be immediately observable by setting the field to either state.

.

*

On the

am

to 3:00:00 am On

first reaches

lcrrt

Sun&y

1:59:59 am,

Daylight Savings..

Eg,

Daylight Savings..

@April”

thelast

Sunday in October, when the time

it is

rdled-barck

......

Enable

.....

Disable

the time increments

to 1:OO:OO

frm 1:59:59

am

BIOS

SETUP

3-7

3-3.

ADVANCE CMOS SETUP

The ADVANCED CMOS SETUP option is used to set the various system options for the user. The user can get various options, some of which are listed below:

n

Weitek Processor

Ll

External Cache Memory

CI

Internal Cache Memory

II

Adaptor ROM Shadow

II

Shadow RAM

3-8

.

BIOS SETUP

___ _----

BIOS SETUP PROGRAM - ADVANCED CMOS SETUP

(C)

1990

___._____~~-

____~-_---

Weitek Processor

External Cache Memory Internal Cache Memory

Adaptor

ROM

Adaptor ROM Shadow CCOO, 16K

Adaptor ROM Shadow DOOO, Adaptor ROM Shadow D400,16K Adaptor ROM Shadow D800,16K Adaptor ROM Shadow Adaptor ROM Shadow EOOO, 16K Adaplor ROM Shadow Adaptor Adaptor ROM Shadow ECOO, 16K Shadow RAM Option

Shadow C800,16K

ROM

Shadow E800,16K

16K

DCOQ 16K

E400,16K

_

__--_-.___J

II-------11

: Absent

:

Enabled

:

Enabled

:

Disabled

:

Disabled

:

Disabled

:

Disabled

:

Disabled

:

Disabled

:

Disabled

:

Disabled

:

Disabled

:

Disabled

:

Disabled

__________~

L-

______-

--------~

ESCExit *---I -

l

F5:Old

I/

1 L._____._ - - _.___ __-..--

__-__-

_-_----

Values

1 : Sel

_I----.

-LI

FGBIOS Setup Defaults

---

(Ctrl)Pu/Pd:Modify

F 1 :Hslp

F7:Power-On

Defaults

F27F3:Color

II

IJ

Explanation of keys:

ESC : Exit to previous screen Arrow keys: Cursor movement

PageUp/PageDown/Ctrl

value of the option by

PageUp/Ctrl

l/-1/10/-10.

If the option has less than

PageDown:

Modify the

10 available answers, then c Ctrl PageUP > is the same as

<

PageUP > and <

CtrlPageDown >

isthesameas <

PageDown >

Fl : Opiton for Help

F2/F3

:

Change Color

FS

:

Get the old values. These are the values with the user

starting from the current session. If the CMOS was good, then

the old values are the CMOS values, hense they are the BIOS Setup default values.

F6

:

This will load all the Options in the Advanced CMOS

Setup/Advanced

Chipset

Setup with the BIOS Setup defaults F7 : This will load all the Options in the Advanced CMOS Setup/Advanced

Chipset

Setup with the Power-On defaults

.

WEITEK Processor

WEITEK coprocessor insert in socket

,preset

is set

When not inserted in socket, absent is set.

BIOS SETUP

External Cache Memory

This function can be setup enable/disable External Cache

(second leave cache)

Internal Cache Memory

64/256KB.

This function can be setup enable/disable CPU Internal cache 8

KB

.

Adaptor RAM Shadow

Adaptor Shadow RAM address range from

C8000H

to

EFFFFH, each Block size at 16KB for enable or disable

Shadow RAM

There are four function that can be selected:

Video: Video shadow

Main

both

Disable

:

Main BIOS shadow

:

Video and Main BIOS Shadow

Disable shadow

:

(COOOO-C7FFFH)

(FOOOO”FFFFFH)

BIOS SETUP

3-11

3-4 ADVANCED

CHIPSET

SETUP

The ADVANCED CHIPSET SETUP option is used to change the register values for the

chipset

registers. The

chipset

registers control most of the system options in the computer. Explanation keys: ESC : Exit to previous screen

:

Arrow keys

PageUp/PageDown/Ctrl PageUp/Ctrl PageDown

the value of the option by than 10 available answers, then <

< PageUp > and < CtrlPageDown > is same as < PageDown

Fl

:

Help for the option

F2/F3 F5

:

Get the old values. These are the values with the user

Cursor movement

:

Change Color

l/-1/10/-10.

Ctrl PageUp >

:

Modify

If the option has less

is same

as

>

starting from the current session. If the CMOS was good, then the old values are the CMOS values, hence they are the BIOS Setup default values. F6 : This will load all the Options in the Advanced CMOS Setup/Advanced

F7

:

This will load all the Options in the Advanced CMOS Setup/Advanced

Chipset

Setup with the BIOS Setup

defauhs

Setup with the Power-On defaults

3-12 BIOS SETUP

_ __-_--.-~-

__-.

1

- -.-----------_---

Non-Cacheable Block- 1 Size Non-Cacheable Block-l Non-Cacheable Block-2 Size Non-Cacheable Block-2 Base Cacheable Video BIOS Area

__._ _-_ - -~-----

__.

_--_

-

_-___-----__~-

(C)

1990

RAM

Address Range

Cacheable

ESC:Exit

f

F5:Old

Values

BIOS Setup Program -

American Megatrends Inc., All Rights

Base

_._.

AMI

BIOS Utilities

--

:

Disabled

:OKB

:

Disabled :OKB

;8MB

:

Y8S

1 .-:

Sel

Ctrl) Pu/Pd: Modify

F6: BIOS Setup Defaults

Reserved

Fl

:

Help F2/F3:

R:

Power-On Defaults

Color

II

BIOS SETUP

3-l 3

Non-Cacheable Block Size

This setup for set Non-Cacheable block size of

64/128/256/5 12K/Disable

Non-Cacheable Block Base

This setup for set Non-Cacheable Block Starting address for example, if a address is a multiple of

Cacheable RAM Address Range

512KB

non-cacheable block is selected its starting

512KB

This Cacheable DRAM size, you can select from range

(l-64MB)

Video BIOS Area Cacheable

Enable or Disable Video BIOS Cacheable Please check your VGA card, If OAK VGA card (slow speed), this function must disable

3-l 4

BIOS SETUP

3-5.

AUTO CONFIGURATION WITH BIOS

DEFAULTS

When you enter AUTO CONFIGURATION WITH BIOS DEFAULTS, the screen will be as follows:

BIOS SETUP PROGRAM -

(C)

1

Load BIOS Setup Default Values from ROM Table (Y/N)

Load BIOS Setup

ESC:Exit

Press

“Y”

or ’ N” to change ADVANCED CMOS SETUP and

ADVANCED

Note:

Tote

BIOS default values, setup

I

mnning high pegonnance.

AMI

1990

American

AUTO CONFIGURATION

Defaullt

1 - 1

CHIPSET

Megatrends

STANDARD CMOS SETUP ADVANCED CMOS SETUP

Values for Advanced CMOS and Advanced

-

:Sel FZIF3:Color FlO:Save

SETUP with BIOS default values.

BIOS SETUP UTILITIES

WlTH

BIOS DEFAULTS

WlTH

POWER-ON DEFAULTS

chipset

register for

.?

N

CHIPSET

& Exit

r

mainboard

1

Setup

I

BIOS SETUP

--- ~

3-l 5

3-6 AUTO CONFIGURATION WITH POWER-ON

DEFAULTS.

When you enter

AUTO)

CONFIGURATION WITH

POWER-ON DEFAULTS, the screen will be as follows:

BIOS SETUP PROGRAM

STANDARD CMOS SETUP

AUTO CONFIGURATION WITH BIOS DEFAULTS

AUTO CONFIGURATION WITH POWER-ON DEFAULTS

Load Power-On Default Values from ROM Table (Y/N) ? N

Load Power-On Default Values for Advanced CMOS and Advanced

-

ESCExit

Press

“Y”

or

I__-.

“NW

I._ :

ADVANCED CMOS SETUP

Sel

to change ADVANCED CMOS SETUP and

- AM

BIOS SETUP UTILITIES

FYF3:

Color

F1O:Save

CHIPSET

& Exit

Setup

ADVANCED CHIPSET SETUP with Power-on default values.

I

3-16

Note :

77le Power-011 default

mairtboard nrrtrtirtg lowperfomrartce.’

values, setup

chipset

register for

I

BIOS SETUP

3-9. WRITE TO CMOS AND EXIT

The options set in the Standard Setup, Advanced Setup, Advanced Chip-set Setup and the New Password (if it has been changed) are stored in the CMOS. The CMOS checksum is calculated and written into the CMOS. After that, control is passed back to the BIOS.

3-10.

DO NOT WRITE TO CMOS AND EXIT

Control is passed back to the BIOS without writing to the CMOS.

BIOS SETUP

3-17