Abit PD5NE User Manual
Table of Contents
Chapter 1 Introduction of PD5N Features
¬ PD5N..........................................................................................1-2
l Specifications.........................................................................1-2
l Layout diagram......................................................................1-4
¯ System block diagram................................................................ 1-11
Chapter 2 Installing the Mainboard
¬ Standard External Connectors...................................................... 2-3
- Jumpers and Switches................................................................ 2-10
® Presentation and Installation of the CPU....................................2-11
¯ Installing System Memory
¡i
Chapter 3 Introduction of BIOS
¬ Standard CMOS Setup Menu.......................................................3-4
- BIOS Features Setup Menu .........................................................3-6
® Chipset Features Setup Menu.....................................................3-12
¯ Power Management Setup Menu................................................3-14
° PCI & Onboard I/O Setup..........................................................3-18
± Load BIOS Defaults ..................................................................3-23
² Load Setup Defaults ..................................................................3-23
³ Password Setting.......................................................................3-24
´ IDE HDD Auto Detection .........................................................3-35
Chapter 4 VGA Installation
Appendix A Quick Installation
DRAM Memory
¡j
.........2-21
Appendix B Intel Pentium CPUs
Appendix C AMD-K5 CPUs
Chapter 1 -2
Appendix DCyrix 6x86 CPUs
Appendix EGeneral Discussion about HDD Installation
Appendix F Technical Support
Appendix GFlash BIOS User Instructions
Introduction of PD5N Features 1-1
Chapter 1 Introduction of PD5N
Features
The PD5N have been especially designed for File server, Workstation and
Professional users. It can support a wide range of processors, including all
Intel CPUs (P54C) and Intel CPUs with MMX (P55C), as well as all AMDK5/K6 and Cyrix 6x86/6x86L/6x86MX CPUs. It also takes into account, as
much as possible, all future CPUs.
The PD5N uses DIP switches or jumpers.
The PD5N uses SIS 5598 series chipsets, and has 512K Level-2 Pipeline
Burst SRAM on board.
72-pin SIMM slots meet the requirements for all memory configurations
required by high level computing. The 72-pin SIMM slots support
traditional Fast Page and EDO DRAM as a memory standard for next
generation 64-bit systems. The 72-pin SIMM slots have been reserved to meet
requirements for both present and future upgrades.
The PD5N provides two Universal Serial Bus (USB) ports and meets the
Concurrent PCI Rev. 2.1 standard. It also supports IDE interface for Fast
HDD (Mode 0~4) and Ultra DMA/33, as well as IDE Bus Master. These
features also meet present and future interface standards and needs.
The PD5N Built-in high-performance 64 bit GUI accelerator. High
resolution modes including 1024 ¡Ñ 768 ¡Ñ 64K Hi colors and 1600 ¡Ñ
1200 ¡Ñ 256 colors. It also supports MPEG and live video playback.
System BIOS features include Plug-and-Play (PnP), Advanced
Configuration Power Interface (ACPI), the newest Desktop Management
Interface (DMI), as well as PD5N’s unique CPU operating frequency and
voltage setup feature in order to meet modern computing demands.
1-2 Chapter 1
¬
Specifications
1. Support AT/ATX power supply
2. Adjustment for Frequency and Voltage
Using DIP switch or jumper wires to adjust the frequency and voltage
on the mainboard
3. Uses ZIF CPU Socket 7 for easy CPU installation
l Support switching power for CPU to get more stable environment
l Supports Intel Pentium CPUs:75~200MHz and P55C CPUs with
MMX (166~233MHz)
l Supports all AMD sixth generation AMD-K5™ CPUs:
75~166MHz, AMD-K6™ CPUs:166MHz, 200MHz , 233MHz
l Supports all Cyrix sixth generation 6x86™ CPUs: P120+, P133+,
P150+, P166+, P166+L, P200+, P200+L and 6x86MX
l Reserved circuitry supports future sixth generation CPUs
4. Chipset
l SIS 5598 chipset
l Supports standard version PCI 2.1
5. L2 Cache Memory
l 256K or 512K of cache memory (Pipeline Burst SRAM)
6. System DRAM
l Four 72-pin SIMM sockets: support FP and EDO DRAM
l Up to 384MB memory configuration possible
7. System BIOS
l AWARD BIOS
l Supports Plug-and-Play (PnP)
l Supports Advanced Configuration Power Interface (ACPI)
l Supports Desktop Management Interface (DMI)
8. Graphic and video Accelerator
l Built-in 64 bit GUI accelerator
l Supports video scaling, overlap and color space conversion
l Supports DDC1 and DDC2B Specification
l Video memory: shared system memory
9. Multi I/O features
Introduction of PD5N Features 1-3
l
Two Universal Serial Bus (USB) ports
l
Four fast IDE channels (PIO mode 0~4, Ultra “DMA/33” and Bus
Master)
l One EPP/ECP parallel port and two 16550A serial ports
l
Two floppy disk drive connectors (FDD) (360K, 720K, 1.2M,
1.44M and 2.88M)
l
Support PS/2 type mouse
10. Other features
l
Standard AT architecture dimensions
l
Four ISA bus slots and four PCI bus slots
l
Supports 3-MODE for a special Japanese floppy disk drive
l
Supports two bootable hard disks--able to run two different
operating systems
l
Supports IDE interface CDROM and LS-120 type floppy disk drive
(Boot only)
l PD5N is using DIP switch to configure mainboard , the RED DIP
switch is using to setup the CPU voltage-VCORE and VIO. The
BLUE DIP switch is using to setup the CPU Frequency and Rating.
Note: All brand names and trademarks are the property of their respective owners.
1-4 Chapter 1
-
Layout diagram
Fig 1-1 Layout diagram
Introduction of PD5N Features 1-5
®
System block diagram
TM
Pentium Processor
3.3v
Host BUS
Control
Address
Data
CACHE
(SRAM)
TAG
CD ROM&
Hark Disk
ISA Device(s)
ISA BUS
Serial
Cntrl
Tag Cntrl
TIO[0..7]
Winbond
w83877f
SiS 5598
LPT
FDC
Addr
Cntrl
ECC
Data
Control
Address/Data
Main
Memory
(DRAM)
VGA
USB
Universal Serial Bus
PCI Device(s)
1
PCI BUS
USB
2
Fig. 1-4 System block diagram
Installing the Mainboard 2-1
Chapter 2 Installing the
Mainboard
This PD5N mainboard not only provides all standard equipment for classic
personal computers, but also provides great flexibility for meeting future
upgrade demands. This chapter will introduce step by step all the standard
equipment and will also present, as completely as possible future upgrade
capabilities. This mainboard is able to support all Intel Pentium including
P55C with MMX, Cyrix 6x86, 6x86L, 6x86MX and AMD-K5/K6 processors
now on the market. (For details, see specifications in Chapter 1.)
However, we cannot guarantee that the description given in this manual on the
circuitry of your mainboard will work for processors not listed in Chapter 1.
For example, the operating voltage of Cyrix’s next generation CPUs is unknown
at the present time. Thus we were not able to include these specifications in
your motherboard. We will supply further information about CPU support
when new CPUs arrive on the market.
This chapter is organized according the following features:
ΠStandard external connectors
• Jumpers and switches
Ž Presentation and Installing of the CPU.
• Installing the system memory.
NNNN
Before proceeding with the installation
Before installing the mainboard please be sure to turn off or disconnect the
power supply unit. Before making any modifications to the hardware
configuration of the mainboard, the power supply to any areas of the mainboard
you plan to modify should be turned off to avoid unnecessary damage to the
hardware.
2-2 Chapter 2
&
User friendly instructions
Our objective is to enable the novice computer user to perform the
installation by themselves. We have attempted to write this document in a
very clear, concise and descriptive manner to help overcome any obstacles you
may face during installation. Please read our instructions carefully and
follow them carefully step-by-step.
Installing the Mainboard 2-3
Knowledge
¬
Standard External Connectors
Inside the case of any computer several cables and plugs have to be
connected. These cables and plugs are usually connected one-by-one to
connectors located on the mainboard. You need to carefully pay attention to
any connection orientation the cables may have and, if any, notice the position of
the first pin of the connector. In the explanations that follow, we will
describe the significance of the first pin.
PN1 - Keylock connector Please pay attention to pin position and orientation
This connector has a specific orientation. Connect the five-thread keylock
connector cable to the PN1 connector pins on the mainboard.
Pin number Name or significance of signal
1 +5VDC
2 No connection
3 Ground
4 Keyboard inhibit Signal
5 Ground
Computer
The “keylock switch” is used to lock the computer’s keyboard.
This disables the keyboard so that unauthorized persons cannot
use it. When this function is in use, you will need to use
the unlock key to activate the keyboard.
2-4 Chapter 2
PN1 - Power ON/OFF switch
There is no specific orientation. Since most cases do not support this feature,
most of you ignore this instruction.
Pin number Name or significance of the signal
10 Power on/off
11 Ground
PN1 - SMI Switch
There is no specific orientation. Connect the two-thread cable to the PN1
connector pins on the mainboard. Since most cases do not support this
feature, most of you ignore this instruction. Furthermore, this feature is not
necessary as it is already a part of the mainboard.
Pin number Name or significance of the signal
13 +5VDC
14 Ground
PN1 - HDD LED connector
This connector has a specific orientation. Connect the two-thread IDE LED
connector cable attached to the case to the IDE LED connector on the
mainboard.
Pin number Name or significance of signal
7 LED’s Cathode
8 LED’s Anode
PN2 - Speaker connector
There is no specific orientation. Connect the four-thread speaker cable to
the PN2 connector pins on the mainboard.
Pin number Name or significance of signal
4 +5VDC
5 Ground
6 Ground
7 Sound Signal
Installing the Mainboard 2-5
PN2 - Hardware Reset connectors
There is no specific orientation. Connect the two-thread hardware reset
cable to the PN2 connector pins on the mainboard.
Pin number Name or significance of signal
1 Hardware reset signal
2 Ground
FAN1 - CPU Fan power connector
This has a specific orientation. Connect the three-threads CPU fan cable to the
FAN1 connector.
Pin number Name of the signal or signification
1 Ground
2 +12V
3 Ground
IR - Infrared remote Connectors (JP10)
Watch the pin number and the orientation.
This has a specific orientation. Your mainboard supports this feature, but you
must buy the infrared remote device as an option.
Pin number Name of the signal or signification
1 +5VDC
2 No connection
3 Receive data
4 Ground
5 Transmit data
ATXPWR - ATX Power input Connectors
These have a specific orientation. The three warning marks indicate that if you
make a mistake in pin number or connection orientation, you could destroy your
equipment. During installation, you just need to connect to the correct pins and
2-6 Chapter 2
in the correct orientation, and to connect connector of the power supply unit to
the connector on the mainboard.
Pin number
1 +3.3VDC 11 +3.3VDC
2 +3.3VDC 12 -12VDC
3 Ground 13 Ground
4 +5VDC 14 PS_ON
5 Ground 15 Ground
6 +5VDC 16 Ground
7 Ground 17 Ground
8 POWERGOOD 18 -5VDC
9 +5VDC 19 +5VDC
10 +12VDC 20 +5VDC
Name of the signal or
signification
Pin number
Name of the signal or
signification
P8/P9 - AT Power input Connectors
These have a specific orientation. The three warning marks indicate that if you
make a mistake in pin number or connection orientation, you could destroy your
equipment. During installation, you just need to connect to the correct pins and
in the correct orientation, and to connect connectors P8 and P9 of the power
supply unit to the connectors on the mainboard.
Pin number
1 POWERGOOD 7 Ground
2 +5VDC 8 Ground
3 +12VDC 9 -5VDC
4 -12VDC 10 +5VDC
5 Ground 11 +5VDC
6 Ground 12 +5VDC
Name of the signal or
signification
Pin number
Name of the signal or
signification
Installing the Mainboard 2-7
Mouse - PS/2 Mouse connector(J4)
Watch the pin number and the orientation
This has a specific orientation. Connect the six-threads PS/2 Mouse cable
provided to the connector on the mainboard.
Pin number Name of the signal or signification
1 Mouse data
2 No connection
3 Ground
4 +5VDC
Computer
5 Ground
6 Mouse clock
knowledge
The “PS/2 Mouse Port” is different from COM1 or COM2 serial
ports to which you can also connect a Mouse. This mainboard
features an extra PS/2 Mouse port, so when you buy a mouse,
be sure that it is a PS/2 Mouse before connecting it to this port.
But if you cannot find any PS/2 Mouse, you can still use COM1
or COM2 to connect a serial mouse to your computer.
KB1 - Keyboard Connector
This has an orientation pin. Connect your keyboard connector to the connector
on the mainboard.
Pin number Name of the signal or signification
1 Keyboard clock
2 Keyboard data
3 No connection
4 Ground
5 +5VDC
I/O Port connectors
Watch the pin number and the orientation
Connector name Pin number Name of the peripheral connected
IDE 1 40 IDE Channel 1
2-8 Chapter 2
IDE 2 40 IDE Channel 2
FDC 34 Floppy Disk connector
LPT 26 Parallel port connector
COM1 10 Serial port COM1connector
COM2 10 Serial port COM2connector
VGA 16 VGA connector
Feature 26 FEATURE connector
USB 16 Universal Serial Bus connector
Installing the Mainboard 2-9
-
Jumpers and Switches
CCMOS(JP9) : Delete the contents of the CMOS
This jumper is set on pins 1 and 2 at the factory, in order for the
computer to function normally, so please do not change this setting.
The main feature of this jumper is to solve situations where the
computer crashes due to improper usage. For instance:
l You have forgotten the password you set.
l You have changed inappropriately the settings in the BIOS
menu.
l You want to change the version of flash BIOS.
All these errors are very serious, you must avoid them. But if you
have made one of these errors, this jumper can save your life. First
turn off the power supply and open the computer case, than place the
jumper on pins 2 and 3 in order to save your computer. But if you use
your computer normally, you should not need to use this feature.
After you have deleted the CMOS information, the computer is saved, but
you still have to go back to the BIOS Setup menu, and reset one by one all
the specifications: CPU, date, hour, FDD and HDD parameters. etc., before
your computer will get back into normal operation.
2-10 Chapter 2
®
Presentation and Installation of the CPU
Since 1996, every two or three months, Intel adds new models to the
Pentium CPU series. That is why the CPU market is filled with a lot of different
models and brands. All CPUs have different electrical specifications. That’s why
installing a CPU is becoming more and more complex. You can’t help that,
because everybody wants to be able to upgrade its hardware. So, you have to
take a bit of time to read this section, in order to be able to install a cheaper and
better processor.
The PD5N mainboard does not only support all the CPUs listed in the
specifications, but also has reserved several circuits in order to be able to
support future processors. But before we go further in our presentation, we
must clarify that “we have only tested the CPUs listed in Chapter 1”, we cannot
guarantee that this board will be able to support future products, because we
cannot forecast future developments. But we will do our best to support any
possible CPU.
Related terminology :
External clock
Also referred to as the external CPU clock, or “Bus clock”, it is the input
clock of the CPU. For instance, Intel Pentium P90, P120 and P150 all have
a 60MHz external CPU clock, but have different internal clock multiplier
factors.
Clock multiplier factor
The real operation clock within the CPU is the multiple of the external
clock. We refer to this factor as the clock multiplier factor. The four
factors possible are 1.5, 2, 2.5 and 3. The factor differs from one CPU to
another. For instance, the Intel Pentium 166 CPU has a 66MHz external
clock, with a multiplier factor of 2.5, so that the speed of the internal clock
is 66MHz x 2.5.
Installing the Mainboard 2-11
Internal clock
Also referred to as the real internal CPU clock, it is the actual internal
operating clock of the CPU. The Internal Clock is a multiple of the external
clock and of the clock multiplier factor. For instance, the Intel Pentium 90
CPU has a 60MHz external clock and its clock multiplier factor is 1.5; the
Intel Pentium P133 CPU has a 66MHz external clock and its clock
multiplier factor is 2.
Internal CPU clock = clock multiplier factor * external CPU clock
AT Bus clock
Also referred to as ISA SPEED, or AT CLOCK, or even ISA Bus clock.
Ten years ago, the original specification of AT Bus clock installed in the
first generation PC/AT computers was 8MHz, this means that there are
some interface cards which can only work at 8MHz. In order to guarantee
compatibility with older hardware, we still support 8MHz AT Bus clock,
but if your interface card is newer or faster, you can choose a higher speed
for the AT Bus clock, in order to increase the transmission rate of the
interface cards. But we recommend you not to be too ambitious. An 8MHz
setup ensures maximum compatibility.
CPU Voltage - Vcore and Vio
From the voltage point of view, 586 series CPU can be divided into two
categories: single voltage CPU and dual voltage CPUs. Single voltage
CPUs include: Intel Pentium P54C series, AMD-K5 and Cyrix 6x86, etc.
Dual voltage CPUs include: Intel P55C with MMX, future AMD-K6 CPUs,
Cyrix 6x86L and 6x86MX.
The voltage of dual voltage CPUs has two components: Vcore and Vio.
Vcore provides all the power for internal processing, and its power
consumption is quite important. Vio provides the power necessary for the
external interface of the CPU.
2-12 Chapter 2
External ClockDS6DS7DS8
50MHZ
55MHZ
60MHZ
66MHZ
75MHZ
83MHZ
P-Rating
The P-Rating was defined by some manufacturers other than Intel to rate
the performance of their CPU in comparison with Intel Pentium CPUs. For
instance, Cyrix 6x86 P166+ has a higher actual speed compared with Intel
Pentium P166, its internal clock needs only 133MHz versus 166MHz for
Intel’s product. The main reason is that Cyrix has improved the internal
architecture of the 6x86 CPU, which means that with the same internal
clock speed, the actual clock speed will be different.
Having read the related terminology above, please refer to the information in
appendices B, C or D for the type and specifications of your own CPU. We
suggest that you note down these specifications, which will help you when you
install the CPU.
Voltage and Frequency Setup
PD5N are using DIP switches to setup the CPU Frequency and voltage
please make sure which kind of CPU and its frequency and voltage before
you setup.
There are two DIP switches on the mainboard, one is using to setup CPU
frequency (including external clock and rating parameter) which is called
SW2, another one is SW1 which is using to setup the CPU voltage.
1. PD5N CPU frequency setting (SW2)
The following tables will present the adjustment for all serials of 586 CPU,
Please setup the correct adjustment regarding the CPU type and brand.
Clock Chip:PLL52C61-01H
ON ON OFF
OFF OFF OFF
ON OFF OFF
OFF ON OFF
ON OFF ON
OFF ON ON
Intel CPU
Installing the Mainboard 2-13
Intel Pentium
/ with MMX
External
clock
Internal
clock
External clock Factor Reserve External clock Frequency
DS1 DS2 DS3 DS4 DS5 DS6 DS7 DS8
P75 50MHz 75MHz OFF OFF OFF OFF OFF ON ON OFF
P90 60MHz 90MHz OFF OFF OFF OFF OFF ON OFF OFF
P100 66MHz 100MHz OFF OFF OFF OFF OFF OFF ON OFF
P120 60MHz 120MHz ON OFF OFF OFF OFF ON OFF OFF
P133 66MHz 133MHz ON OFF OFF OFF OFF OFF ON OFF
P150 60MHz 150MHz ON ON OFF OFF OFF ON OFF OFF
P166 66MHz 166MHz ON ON OFF OFF OFF OFF ON OFF
P200 66MHz 200MHz OFF ON OFF OFF OFF OFF ON OFF
P233 66MHz 233MHz OFF OFF OFF OFF OFF OFF ON OFF
AMD CPU
AMD
K5/K6
K5-PR75 50MHz 75MHz OFF OFF OFF OFF OFF ON ON OFF
K5-PR90 60MHz 90MHz OFF OFF OFF OFF OFF ON OFF OFF
K5-PR100 66MHz 100MHz OFF OFF OFF OFF OFF OFF ON OFF
K5-PR120 60MHz 90MHz OFF OFF OFF OFF OFF ON OFF OFF
K5-PR133 66MHz 100MHz OFF OFF OFF OFF OFF OFF ON OFF
K5-PR150 60MHz 105MHz ON OFF OFF OFF OFF ON OFF OFF
K5-PR166 66MHz 117MHz ON ON OFF OFF OFF OFF ON OFF
K6-166 66MHz 166MHz ON ON OFF OFF OFF OFF ON OFF
K6-200 66MHz 200MHz OFF ON OFF OFF OFF OFF ON OFF
K6-233 66MHz 233MHz OFF OFF OFF OFF OFF OFF ON OFF
External
clock
Internal
clock
External clock Factor Reserve External clock Frequency
DS1 DS2 DS3 DS4 DS5 DS6 DS7 DS8
2-14 Chapter 2
Cyrix/IBM 6x86/6x86L CPU
Cyrix / IBM
6x86/6x86L
PR120+ 50MHz 100MHz ON OFF OFF OFF OFF ON ON OFF
PR133+ 55MHz 110MHz ON OFF OFF OFF OFF OFF OFF OFF
PR150+ 60MHz 120MHz ON OFF OFF OFF OFF ON OFF OFF
PR166+ 66MHz 133MHz ON OFF OFF OFF OFF OFF ON OFF
PR200+ 75MHz 150MHz ON OFF OFF OFF OFF ON OFF ON
6x86MX
PR166 66MHz 133MHz ON OFF OFF OFF OFF OFF ON OFF
PR200 66MHz 166MHz ON ON OFF OFF OFF OFF ON OFF
PR233 66MHz 200MHz OFF ON OFF OFF OFF OFF ON OFF
PR266 66MHz 233MHz OFF OFF OFF OFF OFF OFF ON OFF
External
clock
60MHz 150MHz ON ON OFF OFF OFF ON OFF OFF
75MHz 150MHz ON OFF OFF OFF OFF ON OFF ON
75MHz 188MHz ON ON OFF OFF OFF ON OFF ON
83MHz 166MHz ON OFF OFF OFF OFF OFF ON ON
Internal
clock
External clock Factor Reserve External clock Frequency
DS1 DS2 DS3 DS4 DS5 DS6 DS7 DS8
There are eight switches at SW2, DS1-DS3 is using to setup the rating
parameter, DS6-DS8 is using to setup the external clock, the following
table presents all of the adjustments for the setup combinations of CPU.
Installing the Mainboard 2-15
2.CPU Voltage and Setup (SW2)
For the voltage of 586 serials of CPU, there are two kinds of operation
mode depend different CPUs, single voltage and dual voltage. Please
make sure which kind of CPU and the working voltage that you used
before you install. The following table presents all of the adjustments
of voltage for all serials of 586 CPUs, Please setup the Vcore voltage if
the CPU you are using is single voltage.
SW1 CPU Vcore / Vio settings
VCORE VIO
Vcore/Vio VC1 VC2 VC3 VC4 VC5 VC6 VC7 VC8
3.5/3.3
3.4/3.3
3.3/3.3
3.2/3.38
2.9/3.38
2.8/3.38
2.7/3.38
2.6/3.38
¡i Note ¡j The Vcore of CPU voltage is design using switching power
ON ON ON ON OFF OFF ON OFF
ON ON ON OFF OFF OFF ON OFF
ON ON OFF ON OFF OFF ON OFF
ON ON OFF OFF OFF OFF OFF ON
ON OFF OFF ON OFF OFF OFF ON
ON OFF OFF OFF OFF OFF OFF ON
OFF ON ON ON OFF OFF OFF ON
OFF ON ON OFF OFF OFF OFF ON
supply, the Vio of CPU voltage is design using linear regulator
power supply. That is Vcore can provide more current and
voltage drop without occure more heat and high temperature.
The linear power supply will occure more heat and temperature.
Please setup the Vio voltage smaller than Vcore voltage if the single
voltage CPU is installed, it is using to make sure the CPU voltage is
provided by Vcore (Switching Power Supply), and make the CPU
more stable.
2-16 Chapter 2
¯
Installing System Memory
¡i
DRAM
Memory
When this mainboard was designed, we not only have taken into account
the present needs, but we have also tried to care about demands for future
upgrades:
2. 72-pin SIMM sockets:
PD5N support four 72 pin SIMM sockets
3. Easy installation
Besides the features mentioned above, you can use simultaneously 72-pin
SIMM modules, but you will rarely encounter this kind of configuration. Before
you proceed with installation, be patient, first read what follows:
1. Factory default setting of the mainboard is for 60ns FP or EDO
¡j
You just need to insert the modules, without the help of God. Isn’t it
great?
modules.
If your memory modules are faster than 60ns, say 45ns, you can modify
the BIOS settings in order to speed up the operating speed of the
system. But if you don’t want to modify these settings, or if you don’t
know how to modify them, it’s no big deal.
But if you set the external CPU clock at 66MHz or more, we
recommend you use 60ns or even faster DRAM modules.
2. Memory error check and correction do not support this feature on
this mainboard.
The SIS 5598 chipset does not support this feature, since the memory
error check and correction feature may not be effective, and since you
cannot easily find memory modules with memory check and correction
feature, this mainboard does not support it.
Installing the Mainboard 2-17
3. Maximum memory capacity 384M bytes supported by this
mainboard.
¡i
Computer
knowledge
Relationships between memory modules and Pentium
CPUs
Pentium, Cyrix 6x86 and AMD-K5/K6 are all 64 bit CPUs, but
72-pin SIMM modules are only 32-bit. That’s why they have to
be used in pairs, because the CPU will always be only able to see
64 bits. This means that 72-pin SIMM modules have to be
installed in pairs. For instance, SIMM1 and SIMM2 must form a
pair, and SIMM3 and SIMM4 must form another pair. Of
course, the two members of a pair must be of the same kind
¡i EDO or FP DRAM ¡j , and you cannot use pairs from
different “species”.
But the PD5N support different “pairs” and use different type of
memory modules, notice:
¡j
l ¡i SIMM1 and SIMM2 ¡j must use the same
memory type, as well as ¡i SIMM3 and
SIMM4 ¡j .
l ¡i SIMM1 and SIMM2 ¡j use the same memory
type, and ¡i SIMM3 and SIMM4 ¡j can use
the same type, or a different type, in order to permit you
to obtain the best speed configuration for each “single”
pair, and to make the system work at its maximum
capacity. If one memory pair is slower, it will have no
influence on the pair whose speed is higher.
After installing the DRAM, the BIOS of the mainboard will
automatically detect the size of the memory installed on the
mainboard. Below is a list of all the possible situations:
You use 72-pin SIMM modules:
l
The maximum memory size is 256M bytes.
l
Support possible for single density or double density memory
modules.
l Memory modules supported: 1Mx32 ¡i 4M ¡j , 2Mx32
¡i 8M ¡j, 4Mx32 ¡i 16M ¡j, 8Mx32 ¡i 32M ¡j
or 16Mx32 ¡i 64M ¡j .
2-18 Chapter 2
l
You can also directly refer to table 2-1.
Installing the Mainboard 2-19
Table 2-1 72-pin SIMM Module Installation
¡i SIMM1, SIMM2 ¡j ¡i SIMM3, SIMM4 ¡j
1st¡i 2nd pair ¡j 2nd¡i 1
1Mx32 ¡i 4Mx2 ¡j
2Mx32 ¡i 8Mx2 ¡j
NO MODULE INSERTED
Since the installation described above is valid for the first pair as well as for the second pair, it will not be repeated.
1Mx32 ¡i 4Mx2 ¡j 4Mx32 ¡i 16Mx2 ¡j
2Mx32 ¡i 8Mx2 ¡j 4Mx32 ¡i 16Mx2 ¡j
4Mx32 ¡i 16Mx2 ¡j 4Mx32 ¡i 16Mx2 ¡j
8Mx32 ¡i 32Mx2 ¡j 4Mx32 ¡i 16Mx2 ¡j
16Mx32 ¡i 64Mx2 ¡j 4Mx32 ¡i 16Mx2 ¡j
4Mx32 ¡i 16Mx2 ¡j
8Mx32 ¡i 32Mx2 ¡j
16Mx32 ¡i 64Mx2 ¡j
1Mx32 ¡i 4Mx2 ¡j
2Mx32 ¡i 8Mx2 ¡j
8Mx32 ¡i 32Mx2 ¡j
16Mx32 ¡i 64Mx2 ¡j
1Mx32 ¡i 4Mx2 ¡j
2Mx32 ¡i 8Mx2 ¡j
8Mx32 ¡i 32Mx2 ¡j
16Mx32 ¡i 64Mx2 ¡j
1Mx32 ¡i 4Mx2 ¡j
2Mx32 ¡i 8Mx2 ¡j
8Mx32 ¡i 32Mx2 ¡j
16Mx32 ¡i 64Mx2 ¡j
1Mx32 ¡i 4Mx2 ¡j
2Mx32 ¡i 8Mx2 ¡j
8Mx32 ¡i 32Mx2 ¡j
16Mx32 ¡i 64Mx2 ¡j
1Mx32 ¡i 4Mx2 ¡j
2Mx32 ¡i 8Mx2 ¡j
8Mx32 ¡i 32Mx2 ¡j
16Mx32 ¡i 64Mx2 ¡j
st
pair ¡j
Total memory size
8MB
16MB
32MB
64MB
128MB
16MB
24MB
40MB
72MB
136MB
24MB
32MB
48MB
80MB
144MB
40MB
48MB
64MB
96MB
160MB
72MB
80MB
96MB
128MB
192MB
136MB
144MB
160MB
192MB
256MB
Perhaps you have already found out the rules from the table above. This table,
we belive, contains all possible configurations. In fact, you just need to insert
two or four 72-pin SIMM modules in the socket to complete the installation.
Interuction of BIOS 3-1
Chapter 3 Introduction of BIOS
The BIOS is a program located on a Read-Only Memory chip on the
mainboard. This program will not be lost when you turn the computer off. This
program is also referred to as the boot program. It is the only channel for the
hardware circuit to communicate with the operating system. Its main function is
to manage the setup of the mainboard and interface cards parameters, including
simple parameters such as time, date, hard disk drive, as well as more complex
parameters such as hardware synchronization, device operating mode, CPU
SOFT MENU™ techniques, setup of CPU voltage and speed. The computer
will operate normally, or will operate at its best, only if all these parameters are
correctly configured through the BIOS.
M
Don’t change the parameters inside the BIOS unless you know what
you are doing
The parameters inside the BIOS are used to setup the hardware
synchronization or the device operating mode. If the parameters are not
correct, they will produce errors, the computer will crash, and sometimes you
will even not be able to boot the computer after it has crashed. We recommend
that you do not change the parameters inside the BIOS unless you are familiar
with them. If you are not able to boot your computer anymore, please refer to
the section “Erase CMOS data” in Chapter 2.
When you start the computer, it is controlled by the BIOS program. The
BIOS first operates an auto-diagnostic for all the necessary hardware,
configurates the parameters of the hardware synchronization, and detects all the
hardware. Only when these tasks are completed does it give up control of the
computer to the program of the next level, which is the operating system. Since
the BIOS is the only channel for hardware and software to communicate, it will
be the key factor to system stability, and to ensure that your system performs at
its best. After the BIOS has achieved the auto-diagnostic and auto-detection
operations, it will display the following message:
PRESS DEL TO ENTER SETUP
3-2 Chapter 3
Three to five seconds after the message is displayed, if you press the Del
key, or if you press simultaneously the Ctrl Alt Esc keys, you will access the
BIOS Setup menu. At that moment, the BIOS will display the following
message:
Fig 3 BIOS Setup main menu
In the BIOS Setup main menu of Figure 3, you can see several options. We
will explain these options step by step in the following pages of this chapter, but
let us first see a short description of the function keys you may use here:
l Press Esc to quit the BIOS Setup.
l Press ¡ô¡õ¡÷¡ö (up, down, left, right) to choose, in the
main menu, the option you want to confirm or to modify.
l Press F10 when you have completed the setup of BIOS parameters to
save these parameters and to exit the BIOS Setup menu.
l Press Page Up/Page Down or +/- keys when you want to modify the
BIOS parameters for the active option.
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