EPOX EP-5ATXA-M Technical information

Category
Motherboards
Type
Technical information
TRADEMARK
All products and company names are
trademarks or registered trademarks of
their respective holders.
The specification is subject to change without notice.
EP-5ATXA-M
ISA PCI
MainBoard
with Onboard PCI IDE and Super Multi-I/O.
82430TX PCIset
V023
User Notice
No part of this product, including the product and software may be reproduced, transmit-
ted, transcribed, stored in a retrieval system, or translated into any language in any form
by any means with the express written permission of EPoX Computer Company (herein-
after referred to as EPoX) except documentation kept by the purchaser for backup
purposes. EPoX provedes this manual "as is" without warranty of any kind, either express
or implied, including but not limited to the implied warranties or conditions of
merchantability or fitness for a particular purpose. In no event shall EPoX be liable for
any loss or profits, loss of business, loss of use or data, interruption of business or for
indirect, special incidental, or consequential damages of any kind, even if EPoX has been
advised of the possibility of such damages arising from any defect or error in the manual
or product. EPoX may review this manual from time to time without notice. For updated
BIOS, drivers, or products release information you may visit EPoX’s home page at:
http://www.epox.com.
Products mentioned in this manual are mentioned for identification purposes only. Prod-
uct names appearing in this manual may or may not be registered trademarks of copy-
rights of their respective companies.
The product name and revision number are both printed on the mainboard itself.
© Copyright© 1997by EPoX Computer Co., Ltd. All rights reserved.
Handling Procedures
Static electricity can severely damage your equipment. Handle the EP-5ATXA-M
and any other device in your system with care and avoid contact with components on the
card. Always work on an antistatic surface to avoid possible damage to the card from
static discharge. The packing material placed on a table top makes a good antistatic
work surface. We assume no responsibility for any damage to the EP-5ATXA-M
mainboard that results from failure to follow installation instructions or failure to observe
safety precautions.
CAUTION
The EP-5ATXA-M mainboard is subject to
damage by static electricity. Always
observe the handling procedures.
Package Checklist
Please make sure your package which should include all items listed
below. If you find any item damaged or missing items, please contact
your supplier.
One IDE ribbon cable
One floppy ribbon cable
One manual
One Mainboard
Contents
page
Chapter 1 - Introduction................................................... 1-1
Chapter 2 - Hardware Design ......................................... 2-1
2-1 Overview ..................................................................2-1
2-2 Connectors and Jumpers ............................................2-3
2-3 Real Time Clock Battey Replacement ..........................2-7
2-4 System Memory Configuration ...................................2-8
2-5 Cache Memory Configuration ....................................2-9
2-6 Integrated PCI Bridge .................................................2-10
Chapter 3 - ATX Form -Factor Overview
3-1 External Madem Ring-in Power-On and Keyboard Power-
On Functions ................................................ 3-3
Chapter 4 - Award BIOS Setup ........................................ 4-1
4-1 Standard CMOS Setup ...............................................4-2
4-2 BIOS Features Setup ..................................................4-2
4-3 Chipset Features Setup...............................................4-6
4-4 Power Management Setup ..........................................4-8
4-5 Plug & Play/PCI Configuration....................................4-11
4-6 Integrated Peripherals.................................................4-14
4-7 Load Setup Defaults ...................................................4-16
4-8 Change Supervisor or User Password .........................4-17
4-9 IDE HDD Auto Detection ...........................................4-18
4-10 HDD Low Level Format ..............................................4-20
4-11 Save & Exit Setup .......................................................4-20
4-12 Exit Without Saving ....................................................4-20
Chapter 5 - Technical Information ....................................5-1
5-1 I/O & Memory Map ....................................................5-1
5-2 Time & DMA Channels Map ......................................5-2
5-3 Interrupt Map.............................................................5-2
5-4 RTC & CMOS RAM Map ...........................................5-3
Appendix A: POST Codes...................................................................5-4
Appendix B: I/O Connectors...............................................................5-8
System Block Diagram ............................................. 1-3
EP-5ATXA-M Layout .............................................. 1-4
LOAD SETUP DEFAULT
ROM PCI/ISA BIOS
CMOS SETUP UTILITY
AWARD SOFTWARE, INC.
Load SETUP Default (Y/N)? Y
STANDARD CMOS SETUP SUPERVISOR PASSWORD
BIOS FEATURES SETUP USER PASSWORD
CHIPSET FEATURES SETUP IDE HDD AUTO DETECTION
POWER MANAGEMENT SETUP HDD LOW LEVEL FORMAT
PNP/PCI CONFIGURA ETUP
INTEGRATED PERIPH SAVING
LOAD SETUP DEFAULTS
ESC: QUIT :SELECT ITEM
F10:Save & Exit Setup (Shift)F2 :Change Color
Load Setup Defaults Except Standard COMS SETUP
1. The "LOAD SETUP DEFAULTS" function loads the system default data directly from
ROM and initializes the associated hardware properly. This function is necessary
when you accept this mainboard, or the system CMOS data will corrupt.
Read me first
2. KBPO(KeyBoard Power On) Function : There is a basic requirement that the
" +5V SB" power of the ATX power supply must be > = 0.1A (100mA).
Please refer to chapter 3 -1 for detail.
Introduction 1-1
Chapter 1
Introduction
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The EP-5ATXA-M mainboard is a high performance system hardware
based on Intel Pentium processor and is equipped with four PCI slots, four
standard ISA slots, a PnP Super I/O controller and two dual-port PCI-IDE
connectors for the future expansion. The hardware dimension is an ATX
form-factor that is 208mm x 305mm with a four-layer design technology.
Specification
Intel 82430TX PCIset chipset.
Intel Pentium Processor, Pentium Processor with MMX
TM
technology,
AMD K5/K6 and Cyrix 6x86/6x86L/6x86MX operating at 90 ~ 333 MHz(Easy
CPU CLK Setting JP3 : One Jumper Only) with 321ZIF socket 7 provides
scalability to accept faster processors in the future.
Supports an onboard Switching Voltage Regulator to increase CPU and
systems reliability.
Supports CPU Vcore Voltage 2.0V/2.2V/2.8V/2.9V/3.2V selection.
Supports up to 256 MegaBytes of DRAM (a minimum of 8 MB) on board (72-
Pin SIMM x 2 and 168-Pin DIMM x 3). BIOS will autometically detect and
configure FP DRAM, EDO DRAM and SDRAM (Refer to Chapter 2-4,
System Memory Configuration).
Supports Onboard Pipelined burst synchronous L2 Write Back Cache. The
cache memory is 512KB (64KB*32 SRAM).
Supports four 16-bit ISA slots and four 32-bit PCI slots and provides two
independent high performance PCI IDE interfaces capable of supporting PIO
Mode 3 and Mode 4 devices.
Supports ATAPI (e.g. CD-ROM) devices and Ultra DMA 33 Harddisk for
both IDE interfaces.
Supports 1 floppy port, 1 parallel port (EPP,ECP port), and 2 serial ports
(16550 Fast UART compatible) with PnP Super I/O chip.
Supports both PS/2 style mouse and PS/2 style AT keyboard connectors.
Supports Award Plug & Play BIOS. The BIOS is stored in Flash EPROM
form. It provides better upgradeability for the system.
Supports a CPU Hardware sleep and SMM (System Management Mode)
function.
Supports a PWR/ON connector with an ATX power supply for a Remote ON/
OFF controller, a Ring-in (External Modem only) Power-ON and a Keyboard
Power-ON and Mouse Power-ON function.
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1-2 EP-5ATXA-M
Software power-down when using Windows 95.
Supports Resume by Alarm-Allows your system to turn on at a preselected time.
Supports USDM(Unifed System Diagnostic Manager) to monitor system CPU
Fan speed, chassis Fan Speed, CPU temperature, System temperature, CPU
Voltage and power Supply Voltage in Windows 95 or NT 4.0.
Supports YAMAHA YMF-715 Audio with 3D sound.
Supports the system power LED lights when the system is powered on and
blinks in sleep or suspend mode.
Supports the CPU chassis Fan Stop when the system in sleep or suspend
mode.(The Fan power must be Supplies by onboard J4, J5, J6 connector)
Supports the Universal Serial Bus(USB) Connector onboard.
Utilizes a Lithium battery which provides environmental protection and
longer life-time.
Supports a CPU temperature alarm sound Effect so that when CPU's cooling fan
is malfunc tioning or CPU overheats, CPU speed will automatically slow down.
Supports a dual-button configuration which consists of POWER button for Off/
On transitions and SLEEP button for Sleep/Wake transitions. The configuration
is for ACPI-defined 4-second override feature of the SLEEP button. When the
user presses the power button for less than 4 seconds, the system enters into
sleep mode. When the user presses the power button for more than 4 seconds,
the system is powered off.
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Introduction 1-3
Pentium
processor
PIIX4
I/O Bridge
324 BGA
IDE HDD
Graphics
Port_A
Port_B
>
Universal Serial Bus
ISA Slots
R
>
PCI Slots
>
>
PB
SRAM
TAG
<
<
Control
TAG Control
PCI BUS
Super
I/O
Serial 1
Serial 2
FDD
Printer
>
>
HOST BUS
BIOS
Flash EPROM
<
MD[63:0]
>
MTXC
HOST Bridge
324 BGA
MA[11:0]
CONTROL
Figure 1-2 System Block Diagram
IDE CD-ROM
Audio
Hardware Design 2-1
Chapter 2
Hardware design
2-1 Overview
The EP-5ATXA-M is designed with Intel 82430TX PCIset chipset which is
developed by Intel Corporation to fully support Pentium Processor PCI/ISA system.
The Intel 82430TX PCIset chipset can increase integration and improve performance
designs. The chipset provides an integrated IDE controller with two high performance
IDE interfaces for up to four IDE devices (hard devices, CD-ROM device, etc). The
PnP Super I/O controller provides the standard PC I/O functions: a floppy interface,
two 16-byte FIFO serial ports and an EPP/ECP capable parallel port. The EP-5ATXA-
M layout is shown in the previous page for user's reference. Care must be taken
when inserting memory modules, inserting CPU or even plugging PCI card into the
associated slots to avoid damaging any circuits or sockets on board. A cooling fan is
strongly recommended when installing P54C/P54CTB/P55C (MMX)/K5/K6/6x86
(6x86L)/6x86MX processor due to possible overheat. The EP-5ATXA-M supports
CPU temperature monitor and alarm to prevent CPU's cooling fan from malfunction or
CPUoverheat. There is a heat sensor to monitor CPU temperature. If CPU overheats,
then speaker will alarm and CPU will slow down to save your data and shutdown the
system.
The EP-5ATXA-M supports a minimum of 8MB of system memory and a
maximum of 256MB with 512KB synchronous SRAM onboard to increase system
performance.
The EP-5ATXA-M supports standard Fast Page, EDO (Extended Data Out or
Hyper Page Mode) or synchronous DRAM. The EP-5ATXA-M provides two 72-
pin SIMM and three 168-pin DIMM sites for memory expansion. Each socket sup-
ports 1M x 32 (4MB), 2M x 32 (8MB), 4M x 32 (16MB), and 8M x 32 (32MB) single-
sided or double-sided memory modules. The memory timing requires 70 ns for Fast
Page devices or 60 ns for EDO DRAM. This mainboard has three 168-pin DIMM sites
to support 3.3V (power level) Unbuffered Synchronous DRAMs(SDRAM) and two
72-pin SIMM sites to support 5.0V (power level) Fast Page and EDO DRAM. Memory
parity generation and checking are not supported. (DRAM Modules may be parity[x
36] or non-parity[x 32].
The EP-5ATXA-M supports two Onboard PCI IDE connectors that can support PIO
Mode/Ultra DMA 33 device and automatically detect IDE harddisk type by BIOS
utility.
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2-2 EP-5ATXA-M
The EP-5ATXA-M supports Award Plug & Play BIOS for the ISA and PCI cards. The
BIOS can be located in Flash EPROM. The advantage of having Flash EPROM is
much easier to replace BIOS code if necessary.
The EP-5ATXA-M has been designed with ATX form-factor with ATX power
connector. The mainboard layout and system block diagram are shown in Figure 1-1
and Figure 2-1.
The EP-5ATXA-M has been designed the hardware monitoring to allows you to
monitor various aspects of your system perations and status. These indlude fcatures
such as CPU temerature, system temperature, voltage and fan RPM's.
The EP-5ATXA-M Supports Yamaha YMF715B onboard design. Built-in the
OPL3(FM-synthesizer), 3D Enhanced Controller (3D Sound effect) and Sound Blaster
Game compatibility.
The EP-5ATXA-M
Hardware Design 2-3
Figure 2-1
ATX Power Conn.
Winboand
83977F
M1
M2
PCI#3
PCI#2
PCI#1
PCI#4
<
BIOS
SLEEP SPEAKERTB-LED
G-LED RESET KEYLOCKHD-LED
PW-ON
EP-5ATXA-M Layout
FDD CONN.
Secondary IDE
IR CONN
5 1
JP3
1 25
26
BANK0
SIMM 2
SIMM 1
1
3
JP1
2
PIIX4
MTXC
SOCKET 7
Primary IDE
J3
J9
J2
FDD1
IDE1
J15
J6
64K*64
SRAM
COM1
PS/2
MOUSE
K/B
PRINTER PORT
COM2
USB
PORT
M3
YMF715B-S
1
3
JP13
1
5
JP2
6
10
BANK1
BANK2
BANK2
J4 J5
Line-Out
Line-In
Mic
IDE2
2-4 EP-5ATXA-M
2-2 Connectors and Jumpers
This section describes all of the connectors and jumpers equipped in the mainboard.
Please refer to Figure 2-1 for the location of each connector and jumper.The figure
in the following means connecting pin 1&2 and means connecting pin 2&3.
Jumpers with two pins are shown as for open and for close.
27 28
1 2
JP3:CPU Clock Rate Select. (Easy-Setting-Single-Jumper)
These jumper settings are reserved for the future CPU
versions. When the future CPU versions are ready and
suitable for this mainboard, these jumper settings will be
correctly updated.
*
Pentium Bus Freqency
Pentium MMX x Cyrix 6x86(L) / 6x86MX
AMD K5 / K6 Multiplier IBM 6x86(L) / 6x86MX
JP3
1-2 90MHz 60MHz x 1.5
3-4 100MHz 66MHz x 1.5
5-6 120MHz 60MHz x 2 6x86/L-PR150
7-8 133MHz 66MHz x 2 6x86/L/MX-PR166
9-10 75MHz x 2 6x86/L/MX-PR200
11-12 150MHz 60MHz x 2.5 6x86MX-PR166
13-14 166MHz 66MHz x 2.5 6x86MX-PR200
15-16 188MHz 75MHz x 2.5 6x86MX-PR233
17-18 200MHz 66MHz x 3 6x86MX-PR233
19-20 225MHz 75MHz x 3 6x86MX-PR266
21-22 233MHz 66MHz x 3.5 6x86MX-PR266
23-24 266MHz 66MHz x 4
25-26 300MHz 66MHz x 4.5
27-28 333MHz 66MHz x 5
*
*
*
*
*
*
*
JP2 CPU Vcore voltage selection for Pentium MMX / AMD K6 / Cyrix
6x86L or 6x86MX
1-6 : 2.0V for AMD K6 fast processor (Reserved)
2-7 : 2.8V for Pentium MMX or Cyrix 6x86L
3-8 : 2.9V for AMD K6-PR166/PR200 or Cyrix 6x86MX
4-9 : 3.2V for AMD K6-PR233/PR266
5-10 : 2.2V for AMD K6 fast processor(Reserved)
5 10
1 6
2.0V
2.8V
3.2V
(Default)
2.2V
2.9V
Hardware Design 2-5
KeyLock - Keyboard lock switch & Power LED connector.
1. Power LED(+)
2. N/C
3. GND
4. Keylock
5. GND
Speaker - connect to the system's speaker for beeping.
7. Speaker
8. N/C
9. GND
10. VCC
Reset - Close to restart system.
Turbo LED indicator - LED ON when a higher speed is selected.
Harddisk LED indicator - LED ON when Onboard PCI IDE
Harddisks activites.
1
5
+
+
7
10
J4
*
The power LED lights when
the system is powered on
and blinks in SLEEP MODE
(Suspend mode).
J9 System Power ON/OFF Switch (For ATX Power Suppply Connector)
Pressing the button once will switch the system on and enter the
SLEEP MODE(Suspend mode). While in the SLEEP MODE, a
keystrobe or mouse movement (mouse driver exists) will instantly
"wake up"the system. Pressing the button while the system is on for
more than 4 seconds will turn the system off.
Note : The button should be a momentary switch that is normally on.
1.GND
2.+12V
3.RPM's Sonsor
J4 The Power Supply (+12V) of the CPU Cooling/Power supply /Chassis FAN:
1
3
J5
J6
2-6 EP-5ATXA-M
I/O back panel connector:
JP1 Clear CMOS:
1-2 : Normal operation (Default)
2-3 : Clear CMOS Values
This setting allows users to clear current CMOS data and to return
to the initial data by setting the jumper to 2-3 when the system is
off. This jumper should be brought back to pin 1-2 to restore the
normal operation. Here, we strongly recommend you pull out the
power cable for safety and for avoiding damaging befor clearing
CMOS data.
3
1
5
1.VCC
2.NC
3.IRRX
4.GND
5.IRT
1
J3 IrDA/ASK IR CONNECTOR:
JP13 Keyboard Power ON function:
1-2 : Enabled
(For the details, please refer to Chapter 3-1: Keyboard
Power On Function.)
2-3 : Disabled (Default)
3
1
PS/2 Mouse
PS/2 KB
USB1
USB2
LPT1
COM1 COM2
Game Port
Line-Out Line-In Mic
Hardware Design 2-7
2-3
Real Time Clock Battery Replacement
The battery can be replaced by a Sanyo / Panasonic CR2032, or
other equivalent coin lithium battery. Please follow the steps below to
replace the battery.
+
+
+
+
+
1.Remove
2.Insert
1
2
3
4
1
2
3
+
+
2-4 System Memory Configuration
The EP-5ATXA-M supports different types of settings for the system memory.
There is not jumper for SDRAM hardware setting is for memory configuration. The
following figures show all possible memory combinations.
2-8 EP-5ATXA-M
DIMM (M1) DIMM2 (M2) DIMM3(M3) SIMM1, SIMM2 TOTAL Memery
(BANK 0) (BANK 1) (BANK 2) (BANK2) MAX. = 256MB
SDRAM SDRAM SDRAM
8MB, 16MB 8MB, 16MB 8MB, 16MB
Empty =
32MB 32MB 32MB
SDRAM SDRAM EDO/FP DRAM
8MB, 16MB 8MB, 16MB 4MB, 8MB
Empty =
32MB 32MB 16MB, 64MB
SDRAM EDO/FD DRAM
8MB, 16MB 4MB, 8MB
Empty Empty =
32MB 16MB, 64MB
SDRAM EDO/FD DRAM
8MB, 16Mb 4MB, 8MB
Empty Empty =
32MB 16MB, 64MB
SDRAM SDRAM
8MB, 16MB 8MB., 16MB
Empty Empty =
32MB 32MB
SDRAM SDRAM
[ 64MB, 128MB] [64MB, 128MB] Empty Empty =
NOTE : 1. DIMM3(Bank2) & SIMM1/SIMM2(Bank2) are shared. This means that if
you use SIMM1 & 2 you can not use DIMM3(M3).
2.DIMM module specification is 3.3V / unbuffered.
BANK 0
BANK 2 5V FP / EDO DRAM
3.3V Synchronous DRAM
or 3.3V FP/EDO DRAM
3.3V Synchronous DRAM
or 3.3V FP/EDO DRAM
Memory Configuration Table
SIMM1
SIMM2
DIMM2
DIMM1
>
>
>
BANK 1
x 1
x 1
x 1
x 1
x 1
x 2
DIMM3
BANK 2
>
3.3V Synchronous DRAM
or 3.3V FP/EDO DRAM
x 1 x 2
x 1 x 2
x 1 x 1
Hardware Design 2-9
DIMM Module Installation
Figure 2-2 displays the notch marks and what they should look like on your
DIMM memory module.
DIMMs have 168-pins and two notches that will match with the onboard
DIMM socket. DIMM modules are installed by placing the chip firmly into
the socket at a 90 degree angle and pressing straight down (figure 2-3) until
it fits tightly into the DIMM socket (figure 2-4).
CENTER KEY ZONE
(3.3 V DRAM)
LEFT KEY ZONE
(UNBUFFERED)
Figure 2-2
Figure 2-3
DIMM Module clip before installation
Figure 2-4
DIMM Module clip after installation
To remove the DIMM module simply press down both of the white clips on
either side and the module will be released from the socket.
2-10 EP-5ATXA-M
* EP-5ATXA-M Supports and extends many memory configurations on its 2 SIMM
and 2 DIMM sites. The memory size of any configuration can be combined
flexibly. BIOS will detect your memory configurations and sizes automaticallly.
* The 70ns Fast Page Mode or 60ns EDO is necessary.
* "BANK" = 64Bit = SIMM1, SIMM2 = DIMM1 = DIMM2
2-5 Cache Memory Configuration
The second level (L2) cache is installed in the mainboard to increase the system
performance. The EP-5ATXA-M supports 512KB piplined burst synchronous
SRAM.
64K*64
U17
U16
DATA SRAM
TAG
SRAM
When you have a DIMM module to plug into a 168-pin dual readout connnector,
you must make sure that the DIMM module is 3.3V/Unbuffered to supports Intel
Pentium Processor System.
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Hardware Design 2-11
2-6 Integrated PCI Bridge
The EP-5ATXA-M utilizes Intel 430TX PCIset chipset to support Intel Pentium
Processor PCI/ISA system. The Intel 82430TX PCIset chipset consists of one
82439TX system controller (MTXC) and one 82371AB PCI ISA/IDE Accelerator
(PIIX4) bridge chip. It provides an interface which translates CPU cycle into PCI bus
cycle and PCI burst read/write capability. In addition, it provides a high performance
PCI arbiter and supports four PCI Masters, Rotating Priority Mechanism, and Hidden
Arbitration Scheme Minimizes Arbitration Overhead. The 82371AB(PIIX4) supports
PCI Specification Revision 2.1 Compliant and contains a Universal Serial Bus
interface with both host and hub control functions. EP-5ATXA-M reserves a USB
connector to provide two USB ports for serial transfer at 12 or 1.5 Mbit/sec. This
supports legacy keyboard and mouse software with USB-Base Keyboard and mouse.
There are four interrupts in each PCI slot : INTA#, INTB#, INTC#, and INTD#, since
the EP-5ATXA-M adapts the PCI auto-configuration with the system BIOS Setup
utility. When the system is turned on after adding a PCI add-in card, the BIOS
automatically configure interrupts, DMA channels, I/O space, and other paramaters.
You do not have to configure jumpers or worry about potential resource conflicts.
Because PCI cards use the same interrupt resource as ISA cards, you must specify
the interrupts used by ISA add-in cards in the BIOS Setup utility.
If a "Legacy card" (such as plug paddle card and cable for the ISA slot.) is plugged
in the system, modification in the ROM SETUP UTILITY becomes necessary. First,
enter PCI CONFIGURATION SETUP utility from ROM SETUP UTILITY main menu
to set the "PCI IDE IRQ MAP TO : ISA".
Second, you must enter CHIPSET FEATURES SETUP UTILITY from ROM SETUP
UTILITY main menu and set the " Onboard Primary PCI IDE: Disabled and Onboard
Secondary PCI IDE: Disable." When you plug the PCI/ISA IDE card into the system,
You should Disable Onboard Primary and Secondary PCI IDE from CHIPSET
FEATURES SETUP UTILITY too.
When no paddle card and cable are used, you can set the system interrupt request
(IRQ) on the "Legacy card" (refer to user's manual of the card) to a proper system
IRQ level (In general, card's Primary is assigned to INTA and Secondary is assigned
to INTB). If the card is plugged into slot 1(marked PCI#1), you cannot use the
second slot (marked PCI#2) because the Secondary INT signal takes INTB from the
slot (refer to Page 3-12 for circuit diagram). The user then enters PCI CONFIGURA-
TION SETUP utility from ROM SETUP UTILITY main menu and sets the " PCI IDE
IRQ MAP TO : PCI-Slot 1" (It depends on the slot # where the Legacy card is
plugged).
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Introduction 3-1
Chapter 3
ATX Form-Factor
Overview
Floppy / IDE
connectors close
to peripheral
bays
3
1
/2"
Bay
Figure 3-1: Summary of ATX chassis features
Expandable I/
O
Single chassis fan
for system
ATX
Power
Sup-
ply
Full length
slots
CPU located near
Power Supply
Easy to access
SIMM memory
5
1
/4"
Bay
The EP-5ATXA-M is base on ATX form-factor with a board size 8.2" x 12" (208mm x
305mm). The ATX from-factor is essentially an enlarged baby-AT basedboard rotated
90 degrees within an ATX chassis and uses ATX power supply. The changes make
pentium processor able to locate away from the expansion slots and all onboard I/Os
able to hold full length add-on cards. The improved features of an ATX form-factor
from a baby-AT or LPX form-factor are shown as follows (see Figure 3-1).
1
2
3
4
5
Enhance the ease-of-use for the system
Supports full length cards for ISA and PCI slots
Install the SIMM/DIMM Memory easily
Install a CPU into the socket easily
Greate air-flow in the chassis with ATX power Supply
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EPOX EP-5ATXA-M Technical information

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Type
Technical information

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