EPOX GXA486SPM User Manual
GREEN
GXA486SPM
VESA ISA PCI
TRADEMARK
All products and company names are
trademarks or registered trademarks of
their respective holders.
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
Introduction 1-1
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 hardware 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
VT82C42N
S4
VL-Bus Slot (Slave)
JP16
JP8
JP7
JP17
1
JP14
1J1 J2
S5S6S7
J3
<
BAT.
S1S2S3
Socket 3
TB-SWSPEAKERKEYLOCK RESET TB-LED G-LED HDD-LEDSLEEP
J4
1
JP20
JP21
Main BIOS
JP2
1
1
JP1
SMC
37C665
PCI#3
SIS
85C497
J8J6J5 J7
JPS1
JPS2
JP5
PCI#2
MX8325
IMI
SC464
85C496
SIS
COM2
PCI#1
1
JPS3
1
JP10
JP12
JP13
K/B
PS3
CONN.
1
Power Connector
COM1
FDD CONN.
PRINTER CONN.
M 3
M 2
M 1
PRIMARY (IDE1)
SECONDARY (IDE2)
BANK 0
V V V V
U20 U19 U18 U17
1
JP15
V V V V V
U27 U26 U25 U24 U23
TAG
BANK 1
DATA SRAM
M 4
Figure 1-1
Hardware Design 2-1
Chapter 2
Hardware design
2-1 Motherboard Layout
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 performance.
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
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.
1
1.Power LED(+)
2.N/C
3.GND
4.Keylock
5
5.GND
J2 Speaker - connect to the system's speaker for beeping.
1
1. Speaker
2. N/C
3. GND
4
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.
+
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