EPOX GXA486SPM Manual de usuario

TRADEMARK

All products and company names are

trademarks or registered trademarks of

their respective holders.

GREEN

GXA486SPM

VESA ISA PCI

with super multi-I/O

Contents

Chapter 1 - Introduction ................................................ 1-1

Chapter 2 - Hardware Design......................................... 2-1

Motherboard Layout .............................................................2-1

Connectors and Jumpers.......................................................2-2

System Memory configuration ..............................................2-4

Cache Memory configuration ...............................................2-5

Super Multi-I/O Controller...................................................2-6

Integrated PCI Bridge .......................................................... 2-7

Chapter 3 - Award BIOS ................................................ 3-1

Standard CMOS Setup .........................................................3-2

BIOS Features Setup ............................................................3-2

Chipset Features Setup .........................................................3-3

Power Management Setup ....................................................3-4

PCI Configuration Setup ......................................................3-6

Load Setup Defaults .............................................................3-8

Password Setting ..................................................................3-8

IDE HDD Auto Detection and HDD Low Level Format........3-9

Exit Setup Utility..................................................................3-9

Introduction1-1

Chapter 1

Introduction

The 486SPM motherboard is a high performance system hardware

based on 486 processor. It designed with SIS85C496 / 497 VESA/ISA/PCI

Chipset and SMC FDC37C665GT super multi I/O controller. The hard-

ware dimension is 220mm * 250mm with four layer design technology.

The 486SPM dectects CPU working voltage automaticlly, and its jumper

setting for CPU Selection is very easy.

Specification

•INTEL 80486SX/DX/DX2/DX4/P24D/P24T/SL-Enhanced,

AMD Am486DX/DX2/DX4/SL-Enhanced,

Cyrix M7(Cx486DX/DX2/DX4)/M1SC(Cx5x86),

UMC U5 Processor with 237 pins ZIF socket.

•Supports up to 256 MegaBytes DRAM on board(72 Pins SIMM x 4), and

"Table-Free" DRAM configuration.(Refer to Chapter 2-3 System Memory

Configuration)

•Supports Secondary level Write Through and Write Back Cache mode.

The cache memory combination could be 128KB/256KB/512KB/1MB

(32KB*8, 64KB*8, or 128KB*8 DIP SRAM respectively).

• Support four 16 bits ISA slots, three 32 bits PCI slots, one VL-bus

slot(slave), and dual ports Enhanced IDE connector.

The 486SPM built-in SMC FDC37C665 Super multi-I/O Controller. It

support 1 floppy port (up to 2.88MB), 1 parallel port (EPP,ECP port )

and 2 serial ports (16550 fast UART compatible).

•Support Award BIOS . The BIOS is stored either in ROM or in Flash

ROM (optional) form. It provides better upgradeability for the user when

Flash ROM is installed in the system.

•Supports SL-Enhanced CPU SMM (System Management Mode).

•Supports a PS/2 Style mouse and standard AT Style keyboard connector.

•The 486SPM utilizes Lithium battery which provides environmental

protection and longer life time.

1-2 486SPM

486SPM Layout

Power Connector

J3 J4

1J1 J2

BANK 1

U27 U26 U25 U24 U23

V V V V V

BANK 0

J8J6J5 J7 DATA SRAM

Figure 1-1

U20 U19 U18 U17

JP15

TAG

JP10

Socket3

JP21

BAT.

TB-SWSPEAKERKEYLOCK RESET TB-LED G-LED HDD-LEDSLEEP

JPS3

JP14

JP16

JP8

JP7

JPS1

JPS2

JP5

K/B

CONN.

SIS

V V V V

85C497

JP2

SMC

37C665

JP20

PRIMARY (IDE1)

MX8325

COM2

COM1 PRINTER CONN.

FDD CONN.

SECONDARY (IDE2)

M 4

M 3

M 2

M 1

JP1

IMI

VL-Bus Slot (Slave)

JP17

Main BIOS

PCI#3

PCI#2

PCI#1

SC464

JP12

JP13

85C496

SIS

PS3

VT82C42N

Hardware Design 2-1

2-1 Motherboard Layout

Chapter 2

Hardware design

The 486SPM is designed with SiS85C496/497 PCI/ISA/VESA chipset which is

developped by SiS Corporation to fully support 486 PCI/ISA/VESA system. The

486SPM utilize the green functions provided in the chipset to support power saving

features when the system is in standby state. The 486SPM layout is shown in

previous page (left page) for user's reference. Care must be taken when inserting

memory modules, inserting 486 processor or even plugging PCI/VESA card into

associated slots to avoid damaging any circuits or sockets on board. A cooling fan

is strongly recommended when installing processor due to possible overheat.

The 486SPM supports minimum of 1MB of System Memory and maximum of

256MB while Cache Memory can be 128KB up to 1MB to increase system perfor-

mance.

The 486SPM supports dual ports Enhanced IDE connector, and detects IDE

harddisk type by BIOS utility automaticlly. It also built-in SMC FDC37C665

Super multi-I/O contrrroller.

The 486SPM supports Award BIOS. The BIOS can be located in EPROM or Flash

ROM. The advantage of having Flash ROM is much easier to replace BIOS code if

necessary.

2-2 486SPM

1.Power LED(+)

2.N/C

3.GND

4.Keylock

5.GND

2-2 Connectors and Jumpers

This section describes all of the connectors and jumpers equipped in the

motherboard. Please refer to Figure 1-1 for actual location of each connector and

jumper.

J1 KeyLock - Keyboard lock switch & Power LED connector.

J2 Speaker - connect to the system's speaker for beeping.

1. Speaker

2. N/C

3. GND

4. GND

J3 Reset - Close to restart system.

J4 Turbo Switch : Close for higher speed while Open for

slower speed. A BIOS hot key <CTRL><ALT><+>

also brings system to a higher speed while

<CTRL><ALT><-> set system to a slower speed.

J5 Turbo LED indicator - LED ON when higher speed is

selected.

J6 Power Saving LED indicator - LED ON when system is in

any Saving mode.

J7 Sleep Switch - Force system to enter the Suspend mode.

J8 IDE LED indicator - LED ON when IDE Harddisk activity.

Hardware Design 2-3

JP1 Battery connector

1-4 : External Battery connector

3-4 : Discharge Battery (Clear CMOS Data)

JP2 ROM type selection : 1-2 for 12V Flash ROM while 2-3 for 5V

Flash ROM or EPROM.

JP5 CPU Selection : Open for Intel 80486DX4 while colse for other

CPU.

JP7 AMD (NV8T) CPU CLKMUL : Open for 3X CLK (80486DX4-

100) while Close for 2X CLK(80486DX2-66/80).

JP8 AMD X5 (5x86) CLKMUL : Open for 3X CLK(X5-150MHz)

while Close for 4X CLK(X5-133/160MHz).

JP10 CPU Selection : 2-3 for UMC U5 while 1-2 for other CPU.

JP14 CPU working voltage selection : 1-2,3-4,5-6 for 5V CPU

while Open for 3.3V CPU.(Reserved)

JP16 CPU Selection : Open for Cyrix Cx486DX2 v80 while Close

other CPU.

JP17 CPU Selection : 1-2 for Intel/AMD/UMC CPU, 2-3 for Cyrix

DX2v66/80(3.3V) while open for Cyrix DX/DX2-66/80(5V).

2-3 : Normal

2-4 486SPM

72 1

2-3 System Memory Configuration

The 486SPM supports "Table Free" DRAM configuration and different type of

settings for the system memory. There is no jumper nor connector needed for

memory configuration. You can choice any SIMM socket to insert any type of

72 pins SIMM which you have.

S1,S2,S3,S4,S5,S6,S7 : CPU Selection (Insert the "0 ohm " Resister Pack)

(IMISC464)

CPU CLOCK Selection :

JPS1 CPU CLK JPS1 JPS2 JPS3 CPU TYPE

25 MHz OPEN OPEN 1-2 DX2-50/DX4-75

JPS2 33 MHz CLOSE CLOSE 1-2 DX2-66/DX4-100/X5-133

40 MHz CLOSE OPEN 1-2 DX2-80/DX4-120/X5-160

JPS3 50 MHz OPEN CLOSE 2-3 DX-50/X5-150

S6 : 486DX/2/4/Cyrix M7/AMD(NV8T)/Cyrix 5x86

S7 : Intel P24D/AMD(SV8B)/AMD X5

S1 : UMC/AMD(NV8T)

S2 : Intel-SL

S3 : Cyrix M7

S4 : Intel P24D/Cyrix 5X86/AMD(SV8B)/AMD X5

S5 : 486SX/U5S

Note :

1. AMD(NV8T) = Standard Am486 = Normal CPU/3.3V/8K Cache/Write Through

3. AMD 5x86 = AMD X5

2. AMD(SV8B) = Enhanced Am486 = SL-Enhanced/3.3V/8K Cache/Write Back

4. Cyrix 5x86 = Cyrix M1SC

Hardware Design 2-5

2-4 Cache Memory Configuration

The second level of cache is installed in the motherboard to increase the system

performance. The 486SPM supports different type of combinations for the cache

installation. Jumper 12,13 and 15 settings are used to differential such combina-

tions. Please refer to following configurations for the details.

CACHE TAG SRAM Data SRAM Jumper Setting

Size (U27) Install JP12 JP13 JP15

32K8 x 4 1-2,3-4

128KB 8K8 x 1 U17,18,19,20 1-2 1-2 5-6

32K8 x 8 2-3,4-5

256KB 16K8 x 1 U17,18,19,20 2-3 1-2 6-7

U23,24,25,26

64K8 x 4 1-2,3-4

256KB 16K8 x 1 U17,18,19,20 2-3 1-2 5-6

64K8 x 8 2-3,4-5

512KB 32K8 x 1 U17,18,19,20 2-3 2-3 6-7

U23,24,25,26

128K8 x 4 1-2,3-4

512KB 32K8 x 1 U17,18,19,20 2-3 2-3 5-6

128K8 x 8 2-3,4-5

1MB 64K8 x 1 U17,18,19,20 2-3 2-3 6-7

U23,24,25,26

J15

J12 J13

U26 U25 U24 U23

U20 U19 U18 U17

U27

TAG DATA SRAM

2-6 486SPM

2-5 Super multi -I/O Controller

The 486SPM built in (SMC FDC37C665GT) super mulit-I/O controller. It supports

1 floppy port (up to 2.88MB ), 1 parallel port(EPP/ECP optional) and 2 serial ports

(16550 fast UART compatible). And all of the ports can be ENABLE or DISABLE

by BIOS Utility.(Please refer to Figure 3-4 CHIPSET FEATURES SETUP)

J12 : Floppy Port

J13 : Serial Port 1 (COM1)

J14 : Serial Port 2 (COM2)

J15 : Parallel Port (Printer)

JP20, JP21 Parallel Port ECP/EPP Mode DMA Channel select : 1-2 for

DMA3 while 2-3 for DMA1.

1 6 1 6

5 10 5 10

1 2

33 3425 26

J12

J15

J13J14

PS3 : PS/2 MOUSE CONNECTOR

1 : DATA (Red Wire)

4 : NC

2 : CLOCK (Blue Wire)

3 : GND (Green Wire)

5 : VCC (Yellow Wire)

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