Abit PR5 User Manual
FCC Information
Federal Communications Commission Radio Frequency Interference Statement
This equipment has been tested and found to comply with the limits for a Class B Digital Device, pursuant to Part
15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed
and used in accordance with the instructions, may cause harmful interference to radio communication. However,
there is no guarantee that interference will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be determined by turning the equipment off and on,
the user is encouraged to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the distance between the equipment and receiver.
• Connect the equipment to an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Changes or modifications not expressly approved by the mainboard manufacturer could void the user’s authority to
operate this equipment. To ensure compliance the subject device must use shielded interface cables.
Version 1.01
Copyright © September 1996 All rights reserved
This publication may not be copied, reproduced, translated, transmitted or reduced to
any printed or electronic medium or to any machine readable form, or stored in a
retrieval system, either in whole or in part without the written consent of the copyright holders.
The contents of this publication are subject to change. The manufacturer reserves the
right to alter the contents of this publication at any time and without notice. The
contents of this publication may contain inaccuracies or typographical errors and is
supplied for informational use only.
Products are noted in this publication for identification purposes only. Microsoft is a
registered trademark and Windows is a trademark of Microsoft Corporation. Pentium
is a trademark of Intel Corporation. All other product names or brands may be trademarks or registered trademarks of their respective holders.
Part No.: MN–083–B11–81
Contents
Introduction...............................................................................................................................................................................................................1 –1
Manual Features..............................................................................................................................................................................................1 –1
Package Contents...........................................................................................................................................................................................1 –2
Feature Summary...........................................................................................................................................................................................1 –2
Static Electric Discharge Precautions...........................................................................................................................................1 –4
Hardware Configuration.....................................................................................................................................................................................2 –1
Configuration Quick Reference................................................................................................................................................................2 –1
CPU Configuration & Installation..................................................................................................................................................2 –1
CPU Voltage.....................................................................................................................................................................................2 –1
External Clock Frequency & External Clock Factor....................................................................................................2 –3
DRAM Installation..................................................................................................................................................................................2 –7
DIMM Voltage Settings..............................................................................................................................................................2 –8
Onboard Connectors......................................................................................................................................................................................2 –9
Drive Controller & I/O Port Connectors....................................................................................................................................2 –9
System Enclosure Connectors......................................................................................................................................................2 –12
Other Connectors.................................................................................................................................................................................2 –14
Power Input Connector...........................................................................................................................................................2 –14
Keyboard & PS/2 Mouse Connectors...........................................................................................................................2 –14
IDE Activity LED Connector....................................................................................................................................................2 –14
CPU Fan Power Connector....................................................................................................................................................2 –14
PR5 Hardware Configuration.................................................................................................................................................................2 –16
CPU Options & Installation............................................................................................................................................................2 –16
Related Terminology.................................................................................................................................................................2 –16
CPU Settings.................................................................................................................................................................................2 –18
System Memory Configuration...................................................................................................................................................2 –26
DIMM Voltage Settings...........................................................................................................................................................2 –29
Installing Memory Modules...........................................................................................................................................................2 –30
Level 2 Cache Options.....................................................................................................................................................................2 –32
Onboard Connectors...................................................................................................................................................................................2 –33
Disk Drive Controller & I/O Port Connectors......................................................................................................................2 –33
System Enclosure Connectors......................................................................................................................................................2 –35
Other Connectors.................................................................................................................................................................................2 –35
Power Input Connector...........................................................................................................................................................2 –35
Keyboard & PS/2 Mouse Connectors...........................................................................................................................2 –35
IDE Activity LED Connector....................................................................................................................................................2 –37
CPU Fan Power Connector....................................................................................................................................................2 –37
DIP Switch & Jumper Summary.................................................................................................................................................2 –38
JP3: Clear CMOS Memory....................................................................................................................................................2 –39
JP8: Flash ROM Type...............................................................................................................................................................2 –40
Software Configuration.......................................................................................................................................................................................3 –1
The BIOS CMOS Setup Utility.................................................................................................................................................................. 3 –1
Accessing The CMOS Setup Utility................................................................................................................................................3 –1
Standard CMOS Setup........................................................................................................................................................................3 –4
BIOS Features Setup............................................................................................................................................................................3 –8
Chipset Features Setup....................................................................................................................................................................3 –13
Power Management Setup............................................................................................................................................................3 –14
PCI & Onboard I/O Setup.............................................................................................................................................................3 –18
Load BIOS Defaults............................................................................................................................................................................3 –22
Load Setup Defaults..........................................................................................................................................................................3 –23
Password Setting................................................................................................................................................................................3 –24
IDE HDD Auto Detection..................................................................................................................................................................3 –25
HDD Low Level Format....................................................................................................................................................................3 –25
Save And Exit Setup..........................................................................................................................................................................3 –25
Exit Without Saving...........................................................................................................................................................................3 –25
Updating The BIOS......................................................................................................................................................................................3 –25
IDE Driver Disk...............................................................................................................................................................................................3 –25
Technical Information..........................................................................................................................................................................................4 –1
CPU Specifications..........................................................................................................................................................................................4 –1
Intel CPUs...................................................................................................................................................................................................4 –2
AMD K5 CPUs...........................................................................................................................................................................................4 –9
Cyrix CPUs...............................................................................................................................................................................................4 –10
IDE Installation Guide................................................................................................................................................................................4 –11
IDE Transfer Modes............................................................................................................................................................................4 –11
Installing IDE Devices........................................................................................................................................................................4 –12
IDE Cables......................................................................................................................................................................................4 –12
Example IDE Configurations..........................................................................................................................................................4 –12
BIOS Setup.............................................................................................................................................................................................4 –17
IDE Hard Disk Formatting...............................................................................................................................................................4 –17
Technical Support.........................................................................................................................................................................................4 –18
Troubleshooting Guidelines............................................................................................................................................................4 –18
The Troubleshooting Form..............................................................................................................................................................4 –19
Introduction
☞
This manual has the information you will need to install,
configure and use your PR5 mainboard. This section covers manual features, what is included in the PR5 package
and a summary of the PR5’ s features.
Manual Features
Section 1
Manual Features
Package Contents
Feature Summary
This manual is designed to present information in both
summary and detail so that whether you are unfamiliar
with a topic or just need to get some specific information, you can find what you need with a minimum of
effort. The summarized information is intended for experienced users. Please refer to the detailed explanations
if you are unfamiliar with a topic.
A list of the main topics in each section appears in the
sidebar on the first page. The manual is divided into four
sections:
Section 1: Introduction
Section 2: Hardware Configuration
Section 3: Software Configuration
Section 4: Technical Information
Illustrations and tables identify locations and settings and
sidebar notes and pointers are used to highlight important information.
Sidebar Notes
Summary information, tips and important points generally are in the sidebar on the left side of the page. If the
information in the sidebar is not sufficient for you, check
the main text nearby for additional information or refer
to the component location noted in the sidebar.
Pointers
Cautions, important information, tips and key points are
highlighted by the following icons:
Cautions & Important Information
!
Tips & Key Points
Package Contents
If your PR5 is already installed in a system you can skip
this section. If you are installing the PR5 yourself, please
check and make sure that all items listed are present and
undamaged. If anything is missing or damaged, please
contact your vendor for instructions.
The PR5 package contains the following items:
• PR5 mainboard
• Cable pack including:
1 Parallel cable/port assembly
1 Dual serial cable/port assembly
1 Floppy controller ribbon cable
2 IDE controller ribbon cables
1 USB cable/port assembly (optional)
• Support Disk floppy disk
• User’ s Manual
The cables connect to the port and controller connector
headers on the mainboard. This is explained in Section 2.
The Support Disk has drivers for use with various operating systems. These are covered in Section 3.
Feature Summary
The PR5 mainboard incorporates a variety of performance-enhancing features and is designed for use in File
Server and Workstation computers and other high-end
applications. It uses Intel’ s 430VX chipset, its PCI expansion bus supports the concurrent PCI 2.1 standard and it
has two Universal Serial Bus (USB) ports.
The memory subsystem includes an upgradable 256KB
Pipeline Burst Level 2 cache and support for both 72-pin
Fast Page Mode (FPM) and EDO SIMM memory modules as well as 168-pin DIMM modules. This design supports both current memory standards and provides an
upgrade path to future high-performance 64-bit memory.
The PR5’ s feature list includes:
CPU Support – Socket 7 ZIF socket for Pentium and com-
patible CPUs as follows:
• Intel Pentium 75 – 200MHz CPUs
• AMD AMD-K5 75 – 100MHz CPUs
• Cyrix 6x86 P120+, 133+, 150+ and 166+ CPUs
• Future Pentium-class CPUs
Chipset – Intel 430VX:
• Incorporates concurrent PC Rev. 2.1 for enhanced
interface card speed
L2 Cache – Pipeline Burst Level 2 cache:
• 256KB onboard
• Upgradable to 512KB using COAST module in
upgrade socket
System DRAM – Expandable up to 128MB in multiple
configurations (no DIMM sockets on PR5B):
• Four 72-pin sockets for Fast Page or EDO DRAM
SIMM memory modules
• Two 168-pin sockets for Fast Page, EDO or
SDRAM DIMM memory modules
• Supports Intel-specified 3.3V Unbuffered DRAM
for DIMM modules
System BIOS – Award BIOS with support for:
• Plug and Play
• Advanced Power Management
• DMI (Desktop Management Interface) features including system suspend
Onboard Multi I/O – Onboard I/O ports and disk con-
trollers including:
• Two Universal Serial Bus (USB) ports
• One EPP/ECP bidirectional parallel port
• Two high-speed 16550-compatible serial ports
• Floppy disk controller supports 360KB, 720KB,
1.2MB, 1.44MB and 2.88MB formats
• Enhanced IDE hard disk controller supports PIO
Mode 0 – 4 and Bus Mastering
Additional Features – Other features include:
• “AT” dimensions for ease of installation
• Expansion bus with four ISA and three PCI slots
• Support for the 3-Mode floppy disk standard
• Can boot from either of two hard disk drives allowing support for dual operating systems
Static Electric Discharge Precautions
Static electric discharge can deliver a high-voltage shock
to the mainboard sufficient to damage or destroy components on the board. Because of this, it is important to
observe precautions when you handle the mainboard and
any devices you install on it, including the CPU, memory
modules and expansion cards.
There are several simple precautions you can take:
• Use an anti-static wrist strap, which can be purchased inexpensively from most computer stores.
Connect the strap lead to a grounded metallic object and put on the strap before touching any components.
• Put components on an anti-static pad or keep them
in their anti-static packaging until you install them.
• If you don’ t have a wrist strap or pad, make sure
to touch a metallic object such as the system case
to ground yourself before handling any components.
PR5 Mainboard Layout Key
1. ISA Bus Expansion Slots
2. PCI Bus Expansion Slots
3. USB Port Connector
4. Floppy Disk Drive Controller Connector
5. IDE Controller Connectors IDE1 (left) & IDE2 (right)
6. PS/2 Mouse (left) & Keyboard (right) Connectors
7. Power Input Connectors
8. COM1 (left) & COM2 (right) Serial, LPT Parallel Port Connectors
9. SIMM Memory module sockets 1 – 4 (left to right)
10. DIMM Memory module sockets 1 & 2 (left to right)
11. DS DIP switches
12. CMOS Battery
13. VC DIP switches
14. Flash BIOS Chip
15. COAST PB SRAM cache module socket
16. Heat Sinks
AB–PR5 PCI Mainboard Layout
Ultra
IO
6
7
11
16
12
13
3
1
2
4
5
PB SRAM
PB SRAM
14
82371
PIIX3
15
Pentium
CPU
8
10
9
82437VX
438VX
438VX
System Block Diagram
Hardware Configuration
This chapter is about how to configure the PR5. The first
section is a summary for the experienced user. The second explains the same material in detail. If your PR5 is
already installed in a system you can use this section if
you need to reconfigure the mainboard.
Section 2
Configuration Quick Reference
PR5 Hardware Configuration:
CPU Configuration
Memory Configuration
L2 Cache Configuration
Onboard Connectors
DIP & Jumper Summary
CPU Voltage Settings
You must set the CPU voltage using
DIP switch block VC1-8. The switches
are labeled on the block. The following charts list the settings.
Default Setting
See Section 4 for detailed information on determining CPU voltage.
: 3.38V.
Configuration Quick Reference
This section provides a summary of the information
needed to configure the PR5 mainboard for installation.
Please refer to the section PR5 Hardware Configuration
for detailed information.
CPU Configuration & Installation
The PR5 has a Socket 7 Zero Insertion Force (ZIF) socket.
There are several CPU configuration settings required,
including CPU voltage, External Clock Frequency and
External Clock Factor. Detailed CPU reference information is in Section 4.
CPU Voltage
The following charts show the CPU voltage DIP switch
settings for Intel, AMD and Cyrix CPUs. Reference information on required voltages is in Section 4.
VC DIP Switch Block Location
VC Block
1 2 3 4 5 6 7 8
ON
DIP
Intel Pentium CPU Vcore/Vio Settings
Vcore/Vio VC1 VC2 VC3 VC4 VC5 VC6 VC7 VC8
2.7V/3.3V OFF OFF OFF OFF ON OFF OFF ON
2.8V/3.3V OFF OFF OFF ON OFF OFF OFF ON
2.93V/3.3V OFF OFF ON OFF OFF OFF OFF ON
3.38V/3.3V OFF ON OFF OFF OFF OFF OFF ON
3.52V/3.3V ON OFF OFF OFF OFF OFF OFF ON
Note:
The factory default setting is 3.38V. (VRE=3.52V, STD/VR=3.38V)
AMD AMD–K5 CPU Vcore/Vio Settings
Vcore/Vio VC1 VC2 VC3 VC4 VC5 VC6 VC7 VC8
2.7V/3.38V OFF OFF OFF OFF ON OFF ON OFF
2.8V/3.38V OFF OFF OFF ON OFF OFF ON OFF
2.93V/3.38V OFF OFF ON OFF OFF OFF ON OFF
3.38V/3.3V OFF ON OFF OFF OFF OFF OFF ON
3.52V/3.3V ON OFF OFF OFF OFF OFF OFF ON
Note:
The factory default Vcore setting is 3.38V.
The voltage figures shown are the mid-point of a range, e.g. the range of 3.52V is 3.45V to 3.6V
Cyrix 6x86 CPU Vcore/Vio Settings
Vcore/Vio VC1 VC2 VC3 VC4 VC5 VC6 VC7 VC8
2.7V/3.3V OFF OFF OFF OFF ON OFF OFF ON
2.8V/3.3V OFF OFF OFF ON OFF OFF OFF ON
2.93V/3.3V OFF OFF ON OFF OFF OFF OFF ON
3.38V/3.3V OFF ON OFF OFF OFF OFF OFF ON
3.52V/3.3V ON OFF OFF OFF OFF OFF OFF ON
Note:
Recommended setting for 6x86 CPUs is 3.52V/3.3V.
The voltage figures shown are the mid-point of a range, e.g. the range of 3.52V is 3.45V to 3.6V
External Clock Settings
External Clock Frequency & External Clock Factor
The charts in this section show the DIP switch settings
for both the CPU external clock frequency and clock factor. Only some of the switches in the DS block apply to
these settings.
DS DIP Switch Block Location
You must set the correct external
clock settings using DIP switch block
DS1-8. The switches are labeled on
the block. These charts list the settings.
Default Setting
: Pentium 133.
See Section 4 for detailed CPU information.
DS Block
1 2 3 4 5 6 7 8
ON
DIP
Clock Generator Chip
Important Note
The PR5 uses one of several clock generator chips. The DS DIP switch block
settings vary depending on which chip is installed. To determine the correct
settings you need to know which clock chip is installed. The position of the
chip on the mainboard is noted above. The chip part information is printed
on the top of the chip. The options are:
ICS:
ICS9159-14
PhaseLink:
PLL52C59-14T or PLL52C61-01 or PLL52C61-21
These clock generator chips support a “Normal” and a “Turbo” mode.
Normal mode is the CPU manufacturer’s rated clock speed. Turbo mode is
an overclock mode that increases the CPU’s clock speed by 2.5% over
the Normal rating. For maximum stability and compatibility you should
use the Normal mode for the CPU you are installing.
Intel Pentium CPUs
Clock Chip: PLL52C61-01 or PLL52C61-21
Ext. Clock Factor Ext. Clock Freq.: Normal/Turbo ISA Spd Refresh
CPU:Ext/Int Clock DS1 DS2 DS3 DS4 DS7 DS5 DS6
P75:50/75MHz OFF OFF ON/– ON/– ON/– OFF OFF
P90:60/90MHz OFF OFF ON/OFF ON/OFF OFF/ON ON OFF
P100:66/100MHz OFF OFF OFF/OFF ON/OFF ON/OFF ON OFF
P120:60/120MHz OFF ON ON/OFF ON/OFF OFF/ON ON OFF
P133:66/133MHz OFF ON OFF/OFF ON/OFF ON/OFF ON OFF
P150:60/150MHz ON ON ON/OFF ON/OFF OFF/ON ON OFF
P166:66/166MHz ON ON OFF/OFF ON/OFF ON/OFF ON OFF
P200:66/200MHz ON OFF OFF/OFF ON/OFF ON/OFF ON OFF
Clock Chip: PLL52C59-14T or ICS9159-14
Ext. Clock Factor Ext. Clock Freq. — (Norm/Turbo) ISA Spd Refresh
CPU:Ext/Int Clock DS1 DS2 DS3 DS4 DS7 DS5 DS6
P75:50/75MHz OFF OFF ON ON OFF/ON OFF OFF
P90:60/90MHz OFF OFF OFF ON OFF/ON ON OFF
P100:66/100MHz OFF OFF ON OFF OFF/ON ON OFF
P120:60/120MHz OFF ON OFF ON OFF/ON ON OFF
P133:66/133MHz OFF ON ON OFF OFF/ON ON OFF
P150:60/150MHz ON ON OFF ON OFF/ON ON OFF
P166:66/166MHz ON ON ON OFF OFF/ON ON OFF
P200:66/200MHz ON OFF ON OFF OFF/ON ON OFF
Note:
ICS9159-14 does not support Turbo mode at 75MHz
ISA Spd. – ISA Bus Clock speed, see page 2-19
Refresh – DRAM refresh [reserved for future use] always OFF
DS8 – reserved for future use, always OFF
AMD–K5 CPUs (AMD-SSA/5 & AMD-K5)
Clock Chip: PLL52C61-01 or PLL52C61-21
Ext. Clock Factor Ext. Clock Freq.: Normal/Turbo ISA Spd Refresh
CPU:Ext/Int Clock DS1 DS2 DS3 DS4 DS7 DS5 DS6
PR75:50/75MHz OFF OFF ON/— ON/— ON/— OFF OFF
PR90:60/90MHz OFF OFF ON/OFF ON/OFF OFF/ON ON OFF
PR100:66/100MHz OFF OFF OFF/OFF ON/OFF ON/OFF ON OFF
PR120:60/90MHz OFF OFF ON/OFF ON/OFF OFF/ON ON OFF
PR133:66/100MHz OFF OFF OFF/OFF ON/OFF ON/OFF ON OFF
PR150:60/120MHz OFF ON ON/OFF ON/OFF OFF/ON ON OFF
PR166:66/133MHz OFF ON OFF/OFF ON/OFF ON/OFF ON OFF
Clock Chip: PLL52C59-14T or ICS9159-14
Ext. Clock Factor Ext. Clock Freq. — (Norm/Turbo) ISA Spd Refresh
CPU:Ext/Int Clock DS1 DS2 DS3 DS4 DS7 DS5 DS6
PR75:50/75MHz OFF OFF ON ON OFF/ON OFF OFF
PR90:60/90MHz OFF OFF OFF ON OFF/ON ON OFF
PR100:66/100MHz OFF OFF ON OFF OFF/ON ON OFF
PR120:60/90MHz OFF OFF OFF ON OFF/ON ON OFF
PR133:66/100MHz OFF OFF ON OFF OFF/ON ON OFF
PR150:60/120MHz OFF ON OFF ON OFF/ON ON OFF
PR166:66/133MHz OFF ON ON OFF OFF/ON ON OFF
Note:
ICS9159-14 does not support Turbo mode at 75MHz
ISA Spd. – ISA Bus Clock speed, see page 2-19
Refresh – DRAM refresh [reserved for future use] always OFF
DS8 – reserved for future use, always OFF
Cyrix 6x86 CPUs
Clock Chip: PLL52C61-01 or PLL52C61-21
Ext. Clock Factor Ext. Clock Freq.: Normal/Turbo ISA Spd Refresh
CPU:Ext/Int Clock DS1 DS2 DS3 DS4 DS7 DS5 DS6
P120+:50/100MHz OFF ON ON/— ON/— ON/— OFF OFF
P133+:55/110MHz OFF ON ON/— OFF/— ON/— ON OFF
P150+:60/120MHz OFF ON ON/OFF ON/OFF OFF/ON ON OFF
P166+:66/133MHz OFF ON OFF/OFF ON/OFF ON/OFF ON OFF
P200+:75/150MHz OFF ON ON/— OFF/— OFF/— ON OFF
Clock Chip: PLL52C59-14T or ICS9159-14
Ext. Clock Factor Ext. Clock Freq. — (Norm/Turbo) ISA Spd Refresh
CPU:Ext/Int Clock DS1 DS2 DS3 DS4 DS7 DS5 DS6
P120+:50/100MHz OFF ON ON ON OFF/ON OFF OFF
P133+:55/110MHz OFF ON OFF OFF OFF/— ON OFF
P150+:60/120MHz OFF ON OFF ON OFF/ON ON OFF
P166+:66/133MHz OFF ON ON OFF OFF/ON ON OFF
P200+:75/150MHz OFF ON OFF OFF ON/— ON OFF
Note:
ICS9159-14 does not support Turbo mode at 75MHz
ISA Spd. – ISA Bus Clock speed, see page 2-19
Refresh – DRAM refresh [reserved for future use] always OFF
DS8 – reserved for future use, always OFF
!
Important Note:
Double-sided Modules
There is an important limitation in using double-sided SIMM or DIMM modules. Double-sided modules in one bank
prevents the use of a corresponding
bank of the other type of module. For
example:
• If bank SIMM1/2 has 2-sided modules installed, you can not use the
DIMM2 socket.
• If bank SIMM3/4 has 2-sided modules installed, you can not use the
DIMM1 socket.
• If bank DIMM1 has a 2-sided module
installed, you can not use the SIMM3/
4 sockets.
• If bank DIMM2 has a 2-sided module
installed, you can not use the SIMM1/
2 sockets.
Double-sided modules are modules with
memory chips mounted on both sides.
DRAM Installation
The PR5 has numerous possible system memory configurations using the four 72-pin SIMM sockets and the two
168-pin DIMM sockets. The SIMM sockets work in banks
of two to provide a 64-bit data path. SIMM1/SIMM2 are
one bank, SIMM3/SIMM4 are another. The DIMM sockets are each a bank, for a total of four banks. Please note
the following.
• Installed memory is auto-detected by the BIOS
• Minimum installation 2 SIMMs or 1 DIMM module for a 64-bit data path
• Fast Page (FP), EDO and SDRAM are all supported,
SDRAM only in DIMM modules
• SIMMs: single or double-sided modules of 4MB and
up supported
• DIMMs: single or double-sided modules of 8MB
and up supported
• DIMM sockets support both 5-volt (FP or EDO)
and 3.3-volt (Unbuffered) DRAM; voltage for both
sockets is set by jumper JP11 (see next page)
• Pairs of SIMMs must be the same memory type,
size and speed but the type and size of a second
pair can be different
• Memory Banks:
SIMM1 & SIMM2
SIMM3 & SIMM4
DIMM1
DIMM2
• Bank sequence doesn’ t matter, use any combination as long as other requirements are followed
• DRAM speed must be at least 70ns, can be faster
• Parity checking is not supported
• Maximum 128MB supported
There are numerous allowable memory configurations.
Since bank sequence is not important, as long as you use
SIMMs in pairs you can use any combination of banks.
However, for maximum performance it best to use the
same type of DRAM in all banks installed. SDRAM provides higher performance than EDO DRAM and EDO is
faster than Fast Page Mode DRAM.
!
DIMM Voltage Settings
DIMM Voltage Settings
The DIMM sockets support both 5-volt and 3.3-volt unbuffered DRAM. The voltage setting for both DIMM
sockets is controlled by jumper JP11. The socket voltage
setting must match the voltage of the DRAM on any
DIMM modules you install. The jumper settings are
shown below.
Jumper JP11 sets the voltage supplied to the DIMM sockets. FP & EDO
modules use the 5-Volt setting.
Default Setting
: 3-Volt.
Jumper JP11 Location
Pin 1
x
x
x
JP11: DIMM Voltage
Pins 1-2 Pins 2-3
5-Volt DIMM Short NA
3-Volt DIMM NA Short [Default]
Note:
5-Volt = FP or EDO DRAM
3-Volt = 3.3-Volt Unbuffered DRAM
JP11
Onboard Connectors
The PR5 has onboard connector headers for the disk controllers, I/O ports, system enclosure connections and several other features. Pin 1 locations are noted for cable orientation.
Drive Controller & I/O Port Connectors
The PR5 has floppy disk drive, Enhanced IDE controller,
serial, parallel and USB port connector headers onboard.
Drive Controller Connectors
The Floppy Disk Drive Controller connector is a 34-pin
header. The two Enhanced IDE Controller connectors for
Channel 1 and Channel 2 are 40-pin headers. Ribbon
cables are supplied for each connector. When installing
drives, make sure the colored edge of the drive’ s ribbon
cable is at the Pin 1 end of the both the onboard connector and the drive. Their positions and Pin 1 locations are
shown below.
FDC
IDE1 IDE2
Controller Connector Locations
I/O Port Connectors
There are five connectors:
JP2: Infrared port (5-pin)
USB: USB ports (16-pin)
COM1: COM1 serial port (10-pin)
COM2: COM2 serial port (10-pin)
LPT: LPT1 printer port (26-pin)
Pin 1
: Upper left-hand corner for
USB, upper right-hand corner for
COM & LPT as shown at right.
I/O Port Connectors
The PR5 has two serial, one parallel, a connector for an
IrDA-compatible Infrared port and a dual-port USB connector onboard. Combination ribbon cable to external
port cables are supplied for each connector except the
Infrared port. When installing ports, make sure the colored edge of the ribbon cable is at the Pin 1 end of the
onboard connector. Their positions and Pin 1 locations
are shown below and the pin assignments for the Infrared and USB ports are shown in the table on page 2-11.
I/O Port Connector Locations
COM1
USB
JP2 IR Connector
x x x x x
COM2
LPT
Connector Summary
Name # Pins Function
IDE1 40 IDE Channel 1 connector
IDE2 40 IDE Channel 2 connector
FDC 34 Floppy Disk connector
LPT 26 Parallel Port connector
COM1 10 Serial Port COM1 connector
COM2 10 Serial Port COM2 connector
USB 16 Universal Serial Bus connector
Pin 1
Infrared & USB Port Connectors
Pin Function
IR Port
Pin 1 +5-Volts DC
Pin 2 Not used
Pin 3 Receive Data
Pin 4 Ground
Pin 5 Transmit Data
USB Ports: USB 1 – Pins 1-8, USB 2 – Pins 9-16
Pin 1 +5-Volts
Pin 2 Ground
Pin 3 USBP0 –
Pin 4 Ground
Pin 5 USBP0 +
Pin 6 Ground
Pin 7 Ground
Pin 8 Ground
Pin 9 +5-Volts
Pin 10 Ground
Pin 11 USBP0 –
Pin 12 Ground
Pin 13 USBP0 +
Pin 14 Ground
Pin 15 Ground
Pin 16 Ground
Note:
The USB connector is for two ports. Pins 1 through 8 are for the
first port, and pins 9 through 16 are for the second.
USB 1
USB 2
Enclosure Connectors
There are five connectors in the
block, the other pins are unused:
Reset: Pins 1&2 [1]
Suspend Switch: Pins 6&7 [2]
Turbo LED: Pins 8&9 [3]
Speaker: Pins 11 – 14 [4]
Keylock: Pins 16 – 20 [5]
Connectors are labeled at right.
System Enclosure Connectors
The system enclosure (case) connections are in a header
block which includes the Hardware Reset, Suspend
Switch, Turbo LED, Speaker and Keylock connectors.
Your system case may or may not have all of these features. The location of the connector block and the pin
assignments are shown below.
Enclosure Features Connectors
x x
x x
3
x x
x x
2
x x
x x
x x
x x
x x
1
x x
5
4
☞
Enclosure Features Connector Block
Feature Pin Function
Hardware Reset Connector
Pin 1 Ground
Pin 2 Reset signal
Suspend Switch Connector
Pin 6 Ground
Pin 7 Suspend
Enclosure Features Connectors
Not every pin in the connector block for
system case features is used. Which
features are used depends on the specific case design. If your case does not
have a Keyboard Lock, you can still connect a Power LED lead to Pin 20 and
either Pin 16 or 18. Refer to the chart
at right for the pin assignments.
Turbo LED Connector
Pin 8 – Negative (anode) pin
Pin 9 + Positive (cathode) pin
Speaker Connector
Pin 11 +5-Volts DC
Pin 12 Ground
Pin 13 Ground
Pin 14 Sound signal
Keylock & Power LED Connector
Pin 16 Ground
Pin 17 Keyboard inhibit signal
Pin 18 Ground
Pin 19 Unused
Pin 20 +5-Volts DC (for Power LED)
Note:
Pins 3,4, 5, 10, 15 are unused
Other Connectors
There are several other connectors on the PR5, including
the power input, keyboard, PS/2 mouse, IDE LED activity light and CPU fan connectors. Their locations and pin
assignments are shown below and at right.
Power Input Connector
The system power supply connector is a 12-pin connector, divided into two sections, P8 and P9.
Keyboard & PS/2 Mouse Connectors
The external keyboard connector is a standard “AT” DIN
keyboard connector. The PS/2 mouse connector is a 6pin header block for a PS/2 mouse port.
IDE LED Activity Light Connector
The IDE LED activity light connector is a 4-pin connector header which will accept either a 2-pin or 4-pin IDE
LED activity light connector lead.
CPU Fan Power Connector
The CPU fan power connector is a 3-pin connector header
which will accept either a 2-pin or 3-pin CPU fan power
lead connector.
Connector Locations
J5 IDE LED
x
x
x
x
J2 Keyboard
J4
PS/2
Port
Port
J1
P8 P9
Power Connectors
JP9 CPU Fan Power
+
x x x
+
1
+
Other Onboard Connectors
Pin Function
Power Input Connector J1
Pin 1 Powergood
Pin 2 +5-Volts DC
!
Power Supply Lead Connectors
Some system power supplies have two
leads that connect to the J1 power input connector. If this is the case, you
must connect the power supply leads
so that the black wires are grouped together in the middle.
Pin 3 +12-Volts DC
Pin 4 –12-Volts DC
Pin 5 Ground
Pin 6 Ground
Pin 7 Ground
Pin 8 Ground
Pin 9 –5-Volts DC
Pin 10 +5-Volts DC
Pin 11 +5-Volts DC
Pin 12 +5-Volts DC
IDE Activity LED Connector J5
Pin 1 + Positive (cathode) pin
Pin 2 – Negative (anode) pin
Pin 3 – Negative (anode) pin
Pin 4 + Positive (cathode) pin
CPU Fan Power Connector JP9
Pin 1 Ground
Pin 2 +12-Volts DC for fan power
Pin 3 Ground
PR5 Hardware Configuration
This section describes how to configure the PR5 mainboard hardware in more detail than the Configuration
Quick Reference at the beginning of this section. It is intended for users who are less familiar with computer
hardware. If your PR5 is already installed in a system you
will not need much of this information unless you need
to reconfigure your system.
This section covers all the standard features on the board
plus the upgrade options. Since you are more likely to
need the upgrade options, they come first. The section is
organized as follows
• CPU Options & Installation
• System Memory Configuration
• Level 2 Cache Options
• Onboard Connectors
• DIP Switch and Jumper Summary
The information in this section augments the Configuration Quick Reference. So these sections provide additional
detail, with some review.
CPU Options & Installation
The PR5 supports a wide assortment of CPU chips from
various manufacturers. It is also designed to provide as
much upgradability as current information on future CPUs
allows. We must note, however, that only the CPUs listed
in the manual have been certified to work with the PR5.
Related Terminology
To make it easier to understand the information this section you may want to review the following terms.
Clock
You’ ll see this term used in several ways. Here it
doesn’ t refer to keeping time and is not the clock
that keeps the date and time setting for the system. The mainboard relies on the system clock to
provide digital timing pulses at a constant frequency. The signal the clock generates synchronizes all operations on the board. This “clock frequency”, or the number of signals per second is
what we usually think of as the clock “speed” of
the system.
In Pentium-based designs there is more than one
clock speed. The mainboard components run at one
speed and the CPU will run at the same speed in
its external activity, but will run at some multiple
of that speed internally.
External Clock
The External Clock, also sometimes referred to as
the external CPU clock or bus clock, is the CPU’ s
input clock. The CPU will interface with other components at this speed and its internal clock speed is
a multiple of this external speed. The internal speed
is set by the Clock Multiplier Factor. For example,
the Intel Pentium P90, P120 and P150 CPUs all have
the same external clock, 60MHz, but have different clock factors.
Internal Clock
The Internal Clock is a multiple of the external clock
and is the speed used to list the processor’ s operating speed. The internal speed is set by the Clock
Multiplier Factor. For example, the Intel Pentium
P150 CPU has a 150MHz internal clock speed, a
2.5 multiple of the 60MHz external clock.
Clock Multiplier Factor
The clock multiplier factor is the factor by which
the external clock is multiplied to set the CPU’ s
internal clock speed. The PR5 has four options: 1.5,
2, 2.5, 3. For example, the Pentium P166 requires a
66MHz external clock and a 2.5 clock multiplier
factor to establish its 166MHz internal clock speed.
Note: The full clock frequencies are rounded off
for convenience when listed, so while 66 x 2.5 =
165, the actual clock speed is 166MHz.
ISA Bus Clock
This is the clock speed of the ISA expansion bus
and may also be referred to as the ISA speed, AT
Bus Clock or AT clock. The original specification
was 8MHz. The slower speed ensures compatibility with all ISA expansion cards. Newer ISA expansion cards may be able to operate at faster
speeds, which provide increased performance. The
PR5 can be set for slower or faster ISA Bus clock
speeds. The slower speed ensures maximum compatibility.
CPU Voltage – Vcore & Vio
☞
The CPU input voltage has two components, Vcore
and Vio. Vcore provides the power for internal processing and Vio for the external interface. The two
settings are linked, so the VC DIP settings cover
both of them.
P–Rating
The “P–Rating” is a categorization used to rate the
performance of some Pentium-compatible CPUs.
The rating system was created because some CPUs
perform at a higher effective speed than their internal clock speed indicates. For example, the Cyrix
6x86 P166+ has a clock speed of 133MHz, but performs at an effective speed equal to or greater than
166MHz. The P–rating indicates the effective,
rather than the actual clock speed of the CPU.
CPU Settings
To configure the PR5 for the CPU you will install you
have to set the switches on the two CPU configuration
DIP switch blocks DS and VC. The procedure is as follows:
1. Set the Clock Multiplier Factor using switches DS1
and DS2 on the DS DIP switch block.
2. Set the External Clock configuration using switches
DS3, DS4 and DS7 on the DS DIP switch block.
3. Set the ISA Bus Clock configuration using switch
DS5 on the DS DIP switch block.
4. Make sure DS6 on the DS DIP switch block is OFF.
This controls DRAM refresh and is reserved for use
with future CPUs. The default setting is OFF.
5. Make sure DS8 on the DS DIP switch block is OFF.
This is reserved for use with future CPUs. The default setting is OFF.
6. Set the Vcore/Vio configuration using the VC DIP
switch block.
7. Make sure jumper JP10 is set to the default “ Open”
setting (no jumper cap connecting the two pins).
In order to give you more CPU configuration options
we have included Turbo settings which increase system
performance somewhat as well as the standard CPU configurations which maintain maximum stability and compatibility. The Turbo settings are labeled as such and all
other settings are standard. The charts on the following
pages show the settings for various CPUs.
DS & VC DIP Switch Block Locations
VC Block
1 2 3 4 5 6 7 8
ON
DIP
DS Block
1 2 3 4 5 6 7 8
ON
DIP
DS5 ISA Bus Clock Settings
External Clock DS5 Bus Clock
50Mhz On 6.25MHz
Off 8.33MHz
60MHz On 7.5MHz
Off 10MHz
66MHz On 8.25MHz
Off 11MHz
Note:
The suggested setting is highlighted in bold face type in the chart.
DS5 ON: ISA Bus Clock = External Clock ÷ 8
DS5 OFF: ISA Bus Clock = External Clock ÷ 6
Factory default setting is ON
Intel Pentium CPU Clock Multiplier Factor
Clock Factor DS1 DS2 Clock Factor x External Clock=Internal Clock Speed (in MHz)
1.5 OFF OFF 1.5x50=75; 1.5x60=90; 1.5x66=100
2 OFF ON 2x60=120; 2x66=133
2.5 ON ON 2.5x60=150; 2.5x66=166
3 ON OFF 3x60=180; 3x66=200
Note:
The factory default setting 2
*The internal clock speed also indicates which Pentium it is for e.g. “75” is for P75, “90” is for P90 etc.
Intel Pentium CPU Vcore/Vio Settings
Vcore/Vio VC1 VC2 VC3 VC4 VC5 VC6 VC7 VC8
2.7V/3.3V OFF OFF OFF OFF ON OFF OFF ON
2.8V/3.3V OFF OFF OFF ON OFF OFF OFF ON
2.93V/3.3V OFF OFF ON OFF OFF OFF OFF ON
3.38V/3.3V OFF ON OFF OFF OFF OFF OFF ON
3.52V/3.3V ON OFF OFF OFF OFF OFF OFF ON
Note:
The factory default setting is 3.38V. (VRE=3.52V, STD/VR=3.38V)
Loading...