Pentium P55VPX User Manual

The P55VPX mainboard is a high performance system hardware based

on Intel Pentium processor and is equipped with four PCI slots, four standard ISA slots, Super Multi-I/O controller and dual port PCI-IDE connectors for the future expansion. The hardware dimension is 220mm x 270mm with a four-layer-design technology.

Specification

VIA Apollo VPX/97 PCIset chipset. Intel Pentium Processor, Pentium Processor with MMX Technology, AMD

K5/K6 & Cyrix 6x86/6x86L/6x86MX operating at 100 ~ 233 MHz with 321

ZIF Socket 7 provides scalability to accept faster Processors in the future.

Supports up to 256 MegaBytes of DRAM(72-Pin SIMM x 2, 168-Pin DIMM

x 2).

Supports 512KB (Pipelined Burst SRAM)) L2 Write Back/Through Cache.

Introduction 1-1

Chapter 1

Introduction

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 3/4 and Ultra-DMA33 devices.

Supports ATAPI (e.g. CD-ROM) devices on both IDE interfaces.

Supports a floppy port, a parallel port (EPP,ECP port), two serial ports (16550 Fast UART compatible), 1 USB Connector, a PS/2 style mouse connecter and an AT style keyboard connector.

Supports Award Plug & Play BIOS.

Supports CPU Hardware sleep, APM (Advanced Power Management) and ACPI (Advanced Configuration Power Interface).

Supports an ATX power supply connector for a Remote On/Off , a Phone-

Ring Power On and a Keyboard Power On Function.

Supports Switching Regulator for CPU power supply. Single Jumper for CPU selection

Single Jumper for CPU working voltage selection.

1-2 P55VPX

BIOS

P55VPX Layout

W83877F

PCI#4

PCI#3

PCI#2

PCI#1

USB Conn.

CN4

JP2

1 3

FDD CONN.

Primary IDE

K/B

JP1

CONN.

COM2

COM1

AT Power Conn.

PRINTER

Secondary IDE

DIMM 1

DIMM 2

SIMM 1

ATX Power Conn.

SIMM 2

GND +12V

1 6

JP7

GND

JP8

5 10

2.0V

2.8V

2.9V

3.2V

2.2V

Socket 7

JP10

Note : Means Pin 1

JP11

VIA

82C586B

JP5

1 2

3.3V

7 8

VIA

BANK0

82C585VPX

64K*64

POWER-ON

HD-LEDTB-LEDG-LEDRESETSPEAKERKEYLOCK

Figure 1-1

JP6

14 26

BANK1

BANK2

82C587 82C587

Hardware Design 2-1

Chapter 2

Hardware design

2-1 Mainboard Layout The P55VPX is designed with VIA Apollo VPX/97 PCIset chipset which is

developed by VIA Corporation to fully support Pentium Processor PCI/ISA system. The VIA Apollo VPX/97 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 Winbond W83877F Super I/O controller provides the standard PC I/ O function: floppy interface, two 16 Byte FIFO serial ports and EPP/ECP capable parallel port. The P55VPX 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 associated slots to avoid damaging any circuits or sockets on board. A cooling fan is strongly recommended when installing P54C/P54CTB/P55C/ K5/K6/6x86/6x86L/6x86MX processor due to possible overheat.

The P55VPX supports a minimum of 8MB and a maximum of 256MB of System

Memory while Onboard 512KB cache to increase system performance. (Refer to Page 2-6 Cache Memory Configuration for the details.)

The P55VPX supports standard Fast Page, EDO (Extended Data Out or Hyper

Page Mode) or synchronous DRAM. The P55VPX provides two 72-pin SIMM and two 168-pin DIMM sites for memory expansion. The sockets support 1M x 32(4MB), 2M x 32(8MB), 4M x 32(16MB), and 8M x 32(32MB) single-sided or doublesided memory modules. The memory timing requires 70 ns Fast page devices or 60 ns EDO DRAM. (DRAM Modules may be parity [x 36] or non-parity [x 32].

The P55VPX supports two Onboard PCI IDE connectors, and automatically detects IDE harddisk type by BIOS utility automatic.

The P55VPX supports Award Plug & Play BIOS for the ISA and PCI cards. The BIOS can be located in Flash EPROM which can replace BIOS code easily if necessary.

2-2 P55VPX

2-2 Connectors and Jumpers

This section describes all connectors and jumpers equipped in the mainboard. Please refer to Figure 1-1 for location of each connector and jumper.

KeyLock - Keyboard lock switch & Power LED connector.

JP11

1.Power LED(+)

2.N/C

3.GND

4.Keylock

5.GND

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

1.Speaker

2.N/C

3.GND

4.GND

Reset Switch - Closed to restart system.

Power Saving LED indicator - LED ON when system is

in any Saving mode.

Turbo LED indicator - LED ON when higher speed is selected. # There is no deturbo function so that the turbo LED is always ON.

IDE LED indicator - LED ON when Onboard PCI IDE Harddisks activate.

Power-ON - Push the button to turn on the system.

- Pressing less than 4 seconds to enter the suspend mode

- Pressing more than 4 seconds to turn off the system

Hardware Design 2-3

JP1 PS/2 MOUSE CONNECTOR

JP10 IrDA/ASK IR CONNECTOR

JP7 The Power Supply (+12V) of the CPU Cooling FAN

1.RED wire

2.BLUE wire

3.GREEN wire

4.NC

5.YELLOW wire

1.VCC

2.NC

3.IRRX

4.GND

5.IRTX

1.GND

2.+12V

3.GND

JP2 Keyboard Power-ON Function Selection

JP5 DIMM Working Voltage Selection

(Refer to 2-3 : Memory Configuration for the detail)

1 2

7 8

1-2 : Disabled

2-3 : Enabled

1-2, 3-4 : 5V 5-6, 7-8 : 3.3V (Default)

2-4 P55VPX

JP6 : CPU Clock Rate Selection (Single Jumper)

CPU

Pentium Bus Freqency Pentium MMX x Cyrix 6x86(L) / 6x86MX

1 14

13 26

AMD K5 / K6 Multiplier IBM 6x86(L) / 6x86MX

JP6

1-14 100MHz 66MHz x 1.5 2-15 120MHz 60MHz x 2 6x86/L-PR150

3-16 133MHz 66MHz x 2 6x86/LMX-PR166 4-17 75MHz x 2 6x86/L/MX-PR200 5-18 150MHz 60MHz x 2.5 6x86MX-PR166 6-19 166MHz 66MHz x 2.5 6x86MX-PR200 7-20 188MHz 75MHz x 2.5 6x86MX-PR233 8-21 200MHz 66MHz x 3 6x86MX-PR233

9-22 225MHz 75MHz x 3 6x86MX-PR266 10-23 233MHz 66MHz x 3.5 6x86MX-PR266 11-24 266MHz 66MHz x 4

12-25 300MHz 66MHz x 4.5

13-26 333MHz 66MHz x 5

* *

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.

JP8 : CPU Vcore voltage selection : For Pentium Processor with MMX technology, AMD K6 and Cyrix 6x86L/6x86MX

1 6

1-6 : 2.0V Reserved

2-7 : 2.8V for Pentium Processor with MMX technology

and Cyrix 6x86L

3-8 : 2.9V for AMD K6-PR2-166/200MHz and Cyrix

6x86MX

4-9 : 3.2V for AMD K6-PR2-233/266MHz

5 10

5-10 : 2.2V Reserved for AMD K6 in the future

Hardware Design 2-5

2-3 System Memory Configuration

The P55VPX supports different type of settings for the system memory. The

following figures and table provides all possible memory combinations.

SIMM2 SIMM1

DIMM2 DIMM1

DIMM 1 DIMM 2 SIMM 1,2 TOTAL BANK 0 BANK 1 BANK 2 Memory

SDRAM SDRAM EDO/FP DRAM MAX. = 256MB

4MB

8MB 8MB 8MB

16MB 16MB 16MB

32MB 32MB 32MB

64MB 64MB

128MB 128MB

NOTE : 1. P55VPX supports both Fast Page DRAM and EDO DRAM SIMMs, but they cannot be used in the same memory bank.

x 1 x 2 =

x 1 x 1

x 1

64MB

NONE

BANK 2

BANK 1

BANK 0

2. The KEY ZOOM of the DIMM socket is 3.3V / Unbuffered.

DRAM chip

LEFT KEY ZONE CENTER KEY ZONE

2-6 P55VPX

The P55VPX supports 168-pin DIMM module to extend system memory size. You can install (3.3V / Unbuffered) Fast Page, EDO or Synchronous DRAM. Besides, to support 5VFP and EDO DRAM with DIMM socket, The P55VPX provides JP5 to

allow user using 3.3V/Unbuffered DIMM module with 5V FP and EDO DRAM chips. The setting of the JP5 is shown as follows:

1 2

JP5 DIMM Working Voltage Selection

1-2, 3-4 : 5V 5-6, 7-8 : 3.3V (Default)

7 8

When you have a DIMM module to plug into a 168-pin dual readout connnector, you must make sure that theKEY ZOOM of the DIMM module is 3.3V/Unbuffered and supports Intel Pentium Processor System.

2-4 Cache Memory Configuration

The second level (L2) of cache is installed in the mainboard to increase the system performance. The P55VPX supports different type of combinations for the cache installation. Please refer to the following configurations for the details.

U24

TAG SRAM

U21 U20

64K*32

DATA SRAM

SYN.CACHE On Board

Size (U20,U21)

256KB 32K*32 x 2

512KB 64K*32 x 2

64K*32

2-5 Integrated PCI Bridge

Hardware Design 2-7

The P55VPX utilizes PCIset chipset to support Intel Pentium Processor PCI/ISA

system. The VIA Apollo VPX/97 PCIset chipset consists of the 82C585VP system controller (TSC), two 82C587VP Data Path (TDP) devices, and one 82C586B PCI ISA/ IDE Accelerator bridge chip. It provides an interface which translates CPU cycle into PCI bus cycle, and PCI burst read/write capability. In addition, it provides high performance PCI arbitor to support four PCI Masters, Rotating Priority Mechanism, and Hidden Arbitration Scheme Minimizes Arbitration Overhead.

There are four interrupts in each PCI slot : INTA#, INTB#, INTC#, and INTD#. Since the P55VPX 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 interrupt used by ISA add-in cards in the BIOS Setup utility.

However, if a "Legacy card" (such as plugging a paddle card and cable into an ISA slot) is plugged in the system, modification in the ROM SETUP UTILITY becomes necessary. First of all, you must enter PCI CONFIGURATION SETUP utility from the ROM SETUP UTILITY main menu to set "ISA" for the "PCI IDE IRQ MAP TO

Secondly, you must enter the CHIPSET FEATURES SETUP UTILITY from the ROM SETUP UTILITY main menu and set "Disable" for the "Onboard Primary PCI IDE and the Onboard Secondary PCI IDE. When you plug PCI/ISA IDE cards into the system, You should select "Disabled" for the Onboard Primary and Secondary PCI IDE from the CHIPSET FEATURES SETUP UTILITY too.

You can set the system interrupt request (IRQ) on some "Legacy cards" which have on paddle card and cable. (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 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 the PCI CONFIGURATION SETUP utility from the ROM SETUP UTILITY main menu and set "PCI-Slot 1" for the "PCI IDE IRQ MAP TO (This depends on the slot # where the Legacy card is plugged).

Introduction 3-1

Chapter 3

ATX Power Control

Besides the AT power connector, the P55VPX equips an ATX power connector which is a single 20-PIN input device for an ATX power supply (see Figure 3-3). An ATX power supply provides a build-in Remote Power ON/OFF function. To implement the function, a momentary switch which is normally open should be connected to the position JP11(PIN 24, 25) as the system's power ON/OFF button. Note that an AT power supply does not offer this function.

Based on the ATX power connector, the P55VPX has been designed to support both

ACPI and Soft-OFF functions. According to the definition of ACPI, a Suspend mode will be enabled while you push the JP11(system power ON/OFF) button less than 4 seconds. Nevertheless, the system will be turned off by pressing for more than 4 seconds. Regarding the Soft-OFF(coming from the P55VPX onboard circuit control-

ler), it is another way to turn off your system. Your system can be shut down automatically by an operation system such as Windows 95.

P55VPX BOARD

JP11

System Power ON/OFF Button

Figure 3-3: Simple ATX Power ON/OFF Controller

ATX POWER SUPPLY

3-2 P55VPX

3-1 External Modem Ring-in Power ON and Keyboard Power ON Functions

On the basis of bounded functions in I/O chipset, the two serial ports are able to support the External Modem Ring-in Power ON function. Once users connect the external modem to COM1 or COM2, the P55VPX mainboard allows users to turn on their system through the remote and host's dial-up control.

Exclusive Keyboard Power ON Function

To innovate a unique feature to benefit users, we devoted ourselves to create the easiest and most convenient way to turn on your system based on the the ATX power supply. This function is available only under system being connected to ATX power supply.

How to work with it

Step 1: Please place JP2 at the position 2-3 after you finished the system installation.

JP2 Keyboard Power-ON Function Selection

Step 2: You can enjoy the Keyboard Power ON function by pressing any 1 or 2 keys on you keyboard at the same time for 1-2 seconds. Your system will be

turned on automatically, after releasing the keys. To power off you system, you can use the Soft-OFF function under Windows 95.

Notes:

1. The number of keys needed to turn on a system depends on the model of keyboard you are appplying due to different loadings on different keyboards. Here, we would like to suggest you push 2 keys at the same time..

2. Intel ATX version 2.0 specification has recommended you use the power supply with 0.72A(720mA). With our P55VPX mainboard, the 5.0VSB standby power only has to be > = 0.1A (100mA) then you can enjoy this unique

benefit. However, the ATX power supply which is < 0.1 (100mA) is still applicable to your system by placed JP2 at the position 1-2 to disable this feature.

1-2 : Disabled

2-3 : Enabled

AWARD BIOS 4-1

CHAPTER 4

AWARD BIOS SETUP

Award's ROM BIOS provides a built-in setup program which allows user to modify the basic system configuration and hardware parameters. The modified data will be stored in a battery-backed CMOS RAM so data will be retained even when the power is turned off. In general, the information saved in the CMOS RAM stays unchanged unless there is a configuration change in the system, such as a hard drive replacement or a new device installation.

If this does happen you will need to reconfigure your configuration parameter.

To Enter Setup Propgram

Power on the computer and press < Del> key immediately. This will bring you into BIOS CMOS SETUP UTILITY.

ROM PCI/ISA BIOS(2A5LDPAB)

CMOS SETUP UTILITY

AWARD SOFTWARE, INC.

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 CONFIGURATION SAVE & EXIT SETUP INTEGRATED PERIPHERALS EXIT WITHOUT SAVING LOAD SETUP DEFAULTS

ESC : QUIT : SELECT ITEM F10 : Save & Exit Setup (Shift)F2 : Change Color

Time, Date, Hard Disk Type...

Figure 4-1 CMOS SETUP UTILITY

The menu displays all major selection items. Select the item you need to reconfigure. The selection is made by moving cursor (press any direction key ) to the item and press the 'Enter' key. An on-line help message is displayed at the bottom of the screen as the cursor is moving to various items which provides a better understanding of each function. When a selection is made, the menu of selected item will appear so the user can modify the associated configuration parameters.

4-2 CHAPTER 4

4-1 STANDARD CMOS SETUP

Choose " STANDARD CMOS SETUP" in the CMOS SETUP UTILITY Menu (Fig.4-1). The STANDARD CMOS SETUP allows user to configure system setting such as the current date and time, type of hard disk drive installed, floppy drive type, and display type. Memory size is auto-detected by the BIOS and displayed for your reference. When a field is highlighted (use direction keys to move cursor and <Enter> key to select), the entries in the field will be changed by pressing <PgDn> or <PgUp> keys or user can enter new data directly from the keyboard.

ROM PCI/ISA BIOS(2A5LDPAB)

STANDARD CMOS SETUP

AWARD SOFTWARE, INC.

Date (mm:dd:yy) : Wed, Apr 17 1997 Time (hh:mm:ss) : 14 : 30 : 50

HARD DISKS TYPE SIZE CYLS HEAD PRECOMP LANDZONE SECTORS MODE Primary Master : Auto 0 0 0 0 0 0 Auto Primary Slave : Auto 0 0 0 0 0 0 Auto Secondary Master : Auto 0 0 0 0 0 0 Auto Secondary Slave : Auto 0 0 0 0 0 0 Auto

Drive A : 1.44M,3.5 in. Drive B : None Floppy 3 mode Support : Disable Video : EGA/VGA Halt On : All Errors

Base Memory : 640K Extended Memory: 15360K Other Memory : 384K

Total Memory : 16384K

ESC : Quit : Select Item PU/PD/+/- : Modify F1 : Help (Shift) F2 : Change Color

Figure 4-2 STANDARD CMOS SETUP

NOTE: If the hard disk Primary Master/Slave and the Secondary Master/Slave are set as "Auto", then the hard disk size and model will be auto-detected.

NOTE: The " Halt On :" field is to determine when to halt the system by the BIOS if an error

occurrs.

4-2 BIOS FEATURES SETUP

Selecting the "BIOS FEATURES SETUP" option in the CMOS SETUP UTILITY menu allows user to change system related parameters in the displayed menu. This menu shows all of the manufacturer's default values of the P55VPX. Again, user can move the cursor by pressing direction keys and <PgDn> or <PgUp> keys to modify the parameters. Pressing [F1] key to display help message of the selected item.

This setup program also provides 2 convenient ways to load the default parameter data from BIOS[F6] or CMOS[F7] area if shown data is corrupted. This provides the system a capability to recover from any possible error.

AWARD BIOS 4-3

ROM PCI/ISA BIOS(2A5LDPAB)

BIOS FEATURES SETUP

AWARD SOFTWARE, INC.

Virus Warning : Disabled Video BIOS Shadow : Enabled CPU Internal Cache : Enabled C8000-CBFFF Shadow : Disabled External Cache : Enabled CC000-CFFFF Shadow : Disabled Quick Power On Self Test : Enabled D0000-D3FFF Shadow : Disabled Boot Sequence : A, C D4000-D7FFF Shadow : Disabled Swap Floppy Drive : Disabled D8000-DBFFF Shadow : Disabled Boot Up Floppy Seek : Enabled DC000-DFFFF Shadow : Disabled Boot Up NumLock Status : On Boot Up System Speed : High Gate A20 Option : Fast Typematic Rate Setting : Disabled Typematic Rate (Chars/Sec) : 6 Type matic Delay (Msec) : 250 Security Option : Setup PCI/VGA Palette Snoop : Disabled

OS Select For DRAM > 64MB : Non-OS2

Esc : Quit : Select Item F1 : Help PU/PD/+/- : Modify F5 : Old Values (Shift)F2 : Color F7 : Load Setup Defaults

Figure 4-3 BIOS FEATURES SETUP

Note: The Security Option contians "setup" and "system". The "setup" indicates

that the password setting is for CMOS only while the "system" indicates the password setting is for both CMOS and system boot up.

Virus Warning: This category flashes on the screen. During and after the system boots up, any attempt to write to the boot sector or partition table of the hard disk drive will halt the system and an error message will appear. You should then run an anti-virus program to locate the virus. Keep in mind that this feature protects only the boot sector, not the entire hard drive. Default value is Disabled. Enabled : Activates automatically when the system boots up causing a warning

message to appear when any attempt to access the boot sector or hard disk partition table.

Disabled: No warning message to appear when any attempt to access the boot sector

or hard disk partition table.

CPU Internal Cache / External Cache: These two categories speed up memory access. However, it depends on CPU/chipset design. The default value is Enabled. If your CPU is without Internal Cache then this item "CPU Internal Cache" will not be shown.

Enabled: Enable cache. Disable : Disable cache.

4-4 CHAPTER 4

Quick Power On Self Test:This category speeds up Power On Self Test (POST) after you power on the computer. If it is set to Enable, BIOS will shorten or skip some checking items during POST.

Enabled : Enable quick POST. Disabled: Normal POST.

Boot Sequence:This category determines which drive is searched first for the O/S(Operating System).The default value is A,C.

A,C :The system will search for floppy disk drive first then hard disk drive. C,A :The system will search for hard disk drive first then floppy disk drive.

Swap Floppy Drive: This will swap your physical drive letters A&B if you are using two floppy disks. The default value is Disabled.

Enabled : Floppy A & B will be swapped under the O/S. Disabled : Floppy A & B will be not swapped.

Boot Up Floppy Seek: During Power-On-Self-Test (POST), BIOS will determine if the floppy disk drive installed is 40 or 80 tracks. Only 360K type is 40 tracks while 760K,

1.2M and 1.44M are all 80 tracks. The default value is Enabled. Enabled : BIOS searches for floppy disk drive to determine if it is 40 or 80 tracks.

Note that BIOS cannot tell from 720K, 1.2M or 1.44M drive type as they are all 80 tracks.

Disabled: BIOS will not search for the type of floppy disk drive by track number.

Note that there will not be any warning message if the drive installed is 360K.

Boot Up NumLock Status: The default value is On.

On : Keypad is number keys. Off : Keypad is arrow keys.

Boot UP System Speed: Select default system speed. The system will run at the selected speed after the system boots.

High: Set the speed to high. Low : Set the speed to low.

Gate A20 Option: This refers to the way the system addresses memory above 1MB (extended memory). The default value is Fast.

Normal: The A20 signal is controlled by keyboard controller or chipset hardware. Fast : The A20 signal is controlled by Port 92 or chipset specific method.

AWARD BIOS 4-5

Typematic Rate Setting: This determines the typematic rate.

Enabled : Enable typematic rate and typematic delay programming. Disabled: Disable typematic rate and typematic delay programming. The system

BIOS will use default value of 2 items and the default is controlled by the keyboard.

Typematic Rate(Chars/Sec):

6 : 6 characters per second. 8 : 8 characters per second. 10: 10 characters per second. 12: 12 characters per second. 15: 15 characters per second. 20: 20 characters per second. 24: 24 characters per second. 30: 30 characters per second.

Typematic Delay(Msec): This detecmines the time between the first and second

character displayed, when holding a key. 250 : 250msec. 500 : 500 msec. 750 : 750 msec. 1000: 1000 msec.

Security Option: This category allows you to limit access to the system and Setup, or just to Setup. The default value is Setup. System: The system will not boot and the access to Setup will be denied if the

correct password is not entered at the prompt.

Setup : The system will boot, but the access to Setup will be denied if the correct password is not entered at the prompt.

PCI/VGA Palette Snoop: This filed controls the ability of a primary PCI VGA

controller to share a common palette (when a snoop write cycles) with an ISA video card. The default value is Disabled. Enabled:If an ISA card connects to a PCI VGA card via the VESA connector

and the ISA card connects to VGA monitor and uses the RAMDAC of PCI card, the PCI/VGA Palette Snoop is enabled.

Disabled:Disable the VGA card Palette snoop function.

Video BIOS Shadow: It determines whether video BIOS will be copied to RAM,

however, it is optional from chipset design. Video Shadow will increase the video speed.

Enabled : Video shadow is enabled. Disabled: Video shadow is disabled.

4-6 CHAPTER 4

C8000 - CBFFF Shadow : CC000 - CFFFF Shadow: D0000 - D3FFF Shadow: D4000 - D7FFF Shadow: D8000 - DBFFF Shadow: DC000 - DFFFF Shadow:

These categories determine whether optional ROM will be copied to RAM by 16K byte or 32K byte perunit and the size depends on the chipset.

Enabled : Optional shadow is enabled. Disabled: Optional shadow is disabled.

4-3 CHIPSET FEATURES SETUP

Choose the "CHIPSET FEATURES SETUP" in the CMOS SETUP UTILITY menu to display the following menu.

ROM PCI/ISA BIOS(2A5LDPAB)

CHIPSET FEATURES SETUP

AWARD SOFTWARE, INC.

DRAM Auto Configuration : 60 ns DRAM Timing Control : Auto Video BIOS Cacheable : Enabled System BIOS Cacheable : Disabled Memory Hole At 15Mb Addr. : Disabled Fast DRAM Decoding : Disabled Sustained 3T Write : Enabled 2 Bank PBSRAM : 3-1-1-1 Read Pipeline : Enabled Write Pipeline : Enabled Cache Timing : Fast Linear Burst : Disabled SDRAM Cycle Length : 2 SDRAM Bank Interleave : Disabled

Esc : Quit : Select Item F1 : Help PU/PD/+/- : Modify F5 : Old Values (Shift)F2 : Color F7 : Load Setup Defaults

Figure 4-4 CHIPSET FEATURES SETUP

Note: When you insert slower memery modules in the system and set a faster

timing, maybe the system will hang up.

AWARD BIOS 4-7

DRAM Timing: The default value is 60ns.

60ns : 2 (faster) Burst Wait State, for 60~70ns Fast Page Mode/EDO DRAM. 70ns : 3 (slower) Burst Wait State, for 70ns Fast Page Mode/EDO DRAM.

Video BIOS Cacheable: The default value is Enabled.

Enabled : Enabled the Video BIOS Cacheable to speed up the VGA Performance. Disabled: Disabled the Video BIOS Cacheable function.

Memory Hole at 15M-16M: The default value is Disabled.

Disabled: Normal Setting. Enabled : This field enableds the main memory (15~16MB) remap to ISA BUS.

4-8 CHAPTER 4

4-4 POWER MANAGEMENT SETUP

Choose the " POWER MANAGEMENT SETUP" in the CMOS SETUP UTILITY to display the following screen. This menu allows the user to modify the power management parameters and IRQ signals. In general, these parameters should not be changed unless it is absolutely necessary.

ROM PCI/ISA BIOS

POWER MANAGEMENT SETUP

AWARD SOFTWARE, INC.

Power Management : User Define ** Power Down & Resume Events ** PM Control by APM : Yes IRQ5 (LPT 2) : Primary Video off Option : Suspend -> Off IRQ6 (Floppy Disk) : Disabled Video off Method : V/H SYNC+Blank IRQ7 (LPT 1) : Primary Conserve Mode : Disabled IRQ8 (RTC Alarm) : Disabled Modem Use IRO : 3 IRQ9 (IRQ2 Redir) : Primary ** PM Timers ** IRQ10 (Reserved) : Primary HDD Power Down : Disable IRQ11 (Reserved) : Primary Doze Mode : Disable IRQ12 (PS/2 Mouse) : Primary Suspend Mode : Disable IRQ13 (Coprocessor) : Primary

** PM Events ** IRQ15 (Reserved) : Disabled VGA : OFF LPT & COM : LPT /COM HDD & FDD : OFF DMA /master : OFF Primary INTR : ON IRQ3 (COM 2) : Primary IRQ4 (COM 1) : Primary

IRQ14 (Hard Disk) : Primary

Esc : Quit : Select Item F1 : Help PU/PD/+/- : Modify F5 : Old Values (Shift)F2 : Color F7 : Load Setup Defaults

Figure 4-5 POWER MANAGEMENT SETUP

Again, user can move the cursor by pressing direction keys to the field needed to be modified and press <PgDn> or <PgUp> to alter item selection. You can only change the content of Doze Mode, Standby Mode, and Suspend Mode when the Power

Management is set to 'User Define'.

4-4-1 The Description of the Power Management

A. Power Management mode selection :

Disabled : The system operates in NORMAL conditions (Non-GREEN)

and the Power Management function is disabled.

Max. saving: This mode will maximize the power saving capability.

Min. saving: This mode will minimize the power saving capability.

User define: Allow user to define time-out parameters to control power saving

mode. Refer to item B shown below.

AWARD BIOS 4-9

B. Time-out parameters :

HDD Standby

HDD Standby timer can be set from 1 to 15 minute(s).

System Doze

The "System Doze" mode timer starts to count when there is no "PM events" occurred. The valid time-out setting is from 1 minute up to 1 hour.

System Suspend

This function works only when the Pentium Procssor is installed. The timer starts to count when "System Standby" mode timer is timed out and no "PM Events" occurred. Valid range is from 1 minute up to 1 hour.

4-4-2 Description of the Green Functions

The P55VPX supports HDD Power Down, Doze and Suspend power saving functions. In addition, the hardware suspend function is supported when the J11(24,25) (Refer to Figure1-1) is closed to enter the Suspend function. The detailed description of these functions is provided in the next page.

HDD Standby Mode

When system stops reading or wiriting HDD, the timer starts to count. The system will cut off the HDD power when timer runs out of time. The system will not resume operation until either a read from or a wirte to HDD command is executed again.

Doze Mode

The system hardware will drop down CPU clock from nomal working speed when Doze mode time-out occurs.

Suspend Mode

When the system suspend timer times out, the system will enter the suspend mode and the chipset will stop CPU clock immediately. The power consumption in Suspend Mode is lower than in standby mode. The screen is also blanked out.

4-10 CHAPTER 4

PM Events:

AWARD BIOS defines 15 PM Events in the power management mode (Doze & suspend). The user can initialize any PM Events to be "Enable" or "Disable". When the system detects all of the enabled events, do not have any activity. It will start the system Doze timer first if the "Power Management" is not "Disabled". Once the system Doze timer is timed out, it will process doze power saving procedure by starting the system suspend timer. When the suspend timer times out , all of the CPU clock will stop by dropping system clock down to zero and remains this way until any one of the "Enabled" event occurrs.

4-5 PNP/PCI CONFIGURATION

The PNP/PCI configuration program is for the user to modify the PCI/ISA IRQ signals when various PCI/ISA cards are inserted in the PCI or ISA slots.

WARNING : Any misplacing IRQ could cause system can't pick out the rescouces.

ROM PCI/ISA BIOS(2A5LDPAB)

PNP/PCI CONFIGURATION

AWARD SOFTWARE, INC.

PNP Installed : No CPU to PCI Write Buffer : Enabled Resources Controlled By : Manual PCI Dynamic Bursting : Enabled Reset Configuration Data : Disabled PCI Master 0 WS Write : Enabled

IRQ-3 assigned to : Legacy ISA PCI Delay Transaction : Disabled IRQ-4 assigned to : Legacy ISA IRQ-5 assigned to : PCI/ISA PnP PCI IRQ Actived By : Level IRQ-7 assigned to : Legacy ISA PCI IDE IRQ Map To : PCI-AUTO IRQ-9 assigned to : PCI/ISA PnP Primary IDE INT# : A IRQ-10 assigned to : PCI/ISA PnP Secondary IDE INT# : B IRQ-11 assigned to : PCI/ISA PnP IRQ-12 assigned to : PCI/ISA PnP IRQ-14 assigned to : Legacy ISA IRQ-15 assigned to : Legacy ISA DMA-0 assigned to : PCI/ISA PnP DMA-1 assigned to : PCI/ISA PnP DMA-3 assigned to : PCI/ISA PnP DMA-5 assigned to : PCI/ISA PnP DMA-6 assigned to : PCI/ISA PnP DMA-7 assigned to : PCI/ISA PnP

PCI Peer Concurrency : Enabled

ESC : Quit : Select Item F1 : Help PU/PD/+/- : Modify F5 : No Change (Shift) F2 : Color F7 : Load Setup Defaults

Figure 4-6 PCI CONFIGURATION SETUP

AWARD BIOS 4-11

Resource Controlled By:The default value is Manual. Manual: The field defines that the PNP Card's resource is controlled by manual.

You can set whethe IRQ-X or DMA-X is assigned to PCI/ISA PNP or Legacy ISA Cards.

Auto: If your ISA card and PCI card are all PNP cards. Set this field Auto.

The BIOS will assign the interrupt resource automatically.

Reset Configuration Data: The default value is Disabled. Disabled: Normal Setting Enabled: If you plug some Legacuy cards in the system and record into ESCD

(Extended System Configuration Data). You can set this field to be Enabled and to clear ESCD at one time, when some Legacy cards are removed.

PCI IDE IRQ Map To:The default value is PCI-AUTO.

When you have true PCI card(s) plugged into the system, you will not need to change any thing here in the SETUP program. However, if you do not know whether you are using a true PCI card, please refer to your PCI card user's manual for the details.

When you have a Legacy card (described in section 2-5) to plug into the system,a proper setting is extremely important or it may cause the system hung up. The diagram shown below tells you how the Rotating Priority Mechanism is designed.

PCI#4

INTD

INTA

INTB

INTC

PCI#3

INTC

INTD

INTA

INTB

INTA

PCI#1PCI#2

INTA

INTBINTC

INTCINTD INTD

INTA

INTB

INTC

INTD

Figure 4-7 The Combination of PCI INT# lines

PCI

Chipset

4-12 CHAPTER 4

4-6 INTEGRATED PERIPHERALS

ROM PCI/ISA BIOS(2A5LDPAB)

INTEGRATED PERIPHERALS

WARD SOFTWARE, INC.

Onboard Primary PCI IDE : Enabled Onboard Parallel Port : 378/IRQ7 Onboard Secondary PCI IDE : Enabled Onboard Parallel Mode : ECP / EPP IDE Prefetch Mode : Enabled ECP Mode Use DMA : 3 IDE HDD Block Mode : Enabled Parallel Port EPP Type : EPP1.9 IDE primary Master PIO : Auto IDE Primary Slave PIO : Auto Onboard USB Controller : Disabled IDE Secondary Master PIO : Auto IDE Secondary Slave PIO : Auto IDE Primary Master UDMA : Auto IDE Primary Slave UDMA : Auto IDE Secondary Master UDMA : Auto IDE Secondary Slave UDMA : Auto PCI IDE Secondary Channel : Enabled Onboard FDC Controller : Enabled UART 2 Mode : Standard

If you don't use the Onboard IDE connector, then use On-card

Note:

ESC : Quit : Select Item F1 : Help PU/PD/+/- : Modify F5 : No Change (Shift) F2 : Color F7 : Load Setup Defaults

(PCI or ISA card) IDE connector. You have to set Onboard Primary PCI IDE: Disabled and Onboard Secondary PCI IDE: Disabled from CHIPSET FEATURES SETUP UTILITY.

The Onboard PCI IDE cable should be equal to or less than

18 inches (45 cm.).

IDE HDD Block Mode: The default value is Enabled.

Enabled : Enabled IDE HDD Block Mode. The HDD transfer rate is better than Disable.

Disabled: Disable IDE HDD Block Mode. PCI Slot IDE 2nd Channel: The default value is Enabled.

Enabled : Enable secondary IDE port and BIOS will assign IRQ15 for this port. Disabled : Disable secondary IDE port and IRQ15 is available for other device.

Onboard Primary PCI IDE: The default value is Enabled.

Enabled : Enable Onboard 1st channel IDE port. Disabled : Disable Onboard 1st channel IDE port. When use On-card (PCI or ISA

card) IDE connector.

Onboard Secondary PCI IDE: The default value is Enabled.

Enabled : Enable Onboard 2nd channel IDE port. Disabled : Disable Onboard 2nd channel IDE port When use On-card (PCI or ISA

card) IDE connector.

AWARD BIOS 4-13

IDE Primary Master PIO: The default value is Auto.

Auto : BIOS will automatically detect the Onboard Primary Master PCI

IDE HDD Accessing mode.

Mode0~4 : Manually set the IDE Accessing mode.

IDE Primary Slave PIO: The default value is Auto.

Auto : BIOS will automatically detect the Onboard Primary Slave PCI IDE

HDD Accessing mode.

Mode0~4 : Manually set the IDE Accessing mode.

IDE Secondary Master PIO: The default value is Auto.

Auto : BIOS will automatically detect the Onboard Secondary Master PCI

IDE HDD Accessing mode.

Mode0~4 : Manually set the IDE Accessing mode.

IDE Secondary Slave PIO: The default value is Auto.

Auto : BIOS will automatically detect the Onboard Secondary Slave PCI

IDE HDD Accessing mode.

Mode0~4 : Manually set the IDE Accessing mode.

Onboard FDC Controller: The default value is Enabled.

Enabled : Enable the Onboard SMC CHIP's floppy drive interface controller.

Disabled : Disable the Onboard SMC CHIP's floppy drive interface controller,

When using On-card ISA FDC's controller.

Onboard UART 1: This field allows the user to sellect the serial port. The default value is 3F8H/IRQ4.

COM1: Enable Onboard Serial port 1 and address is 3F8H/IRQ4. COM2: Enable Onboard Serial port 1 and address is 2F8H/IRQ3. COM3: Enable Onboard Serial port 1 and address is 3E8H/IRQ4. COM4: Enable Onboard Serial port 1 and address is 2E8H/IRQ3. Disabled: Disable Onboard SMC CHIP's Serial port 1.

Onboard UART 2: This field allows the user to sellect the serial port. The default value is 2F8H/IRQ3.

COM1: Enable Onboard Serial port 2 and address is 3F8H/IRQ4. COM2: Enable Onboard Serial port 2 and address is 2F8H/IRQ3. COM3: Enable Onboard Serial port 2 and address is 3E8H/IRQ4. COM4: Enable Onboard Serial port 2 and address is 2E8H/IRQ3. Disabled: Disable Onboard SMC CHIP's Serial port 2.

4-14 CHAPTER 4

Onboard UART 2 Mode:The default value is standard. This field allows the User to select the COM2 port that can support a serial Infrared Interface.

Standard: Support a Serial Infrared Interface IrDA. HPSIR: Support a HP Serial Infrared Interface format. ASKIR: Support a Sharp Serial Infrared Interface format.

Onboard Parallel port: This field allows the user to sellect the LPT port. The

default value is 378H/IRQ7.

378H : Enable Onboard LPT port and address is 378H and IRQ7 278H : Enable Onboard LPT port and address is 278H and IRQ5. 3BCH : Enable Onboard LPT port and address is 3BCH and IRQ7. Disabled : Disable Onboard SMC CHIP's LPT port.

NOTE: Parallel Port address is 378H/3BCH that selects the rounting of IRQ7 for LPT1.

Parallel Port address is 278H that selects the rounting of IRQ5 for LPT1.

Parallel port Mode: This field allows the user to sellect the parallel port mode.

The default value is ECP+EPP.

Normal : Standard mode. IBM PC/AT Compatible bidirectional parallel port. EPP : Enhanced Parallel Port mode. ECP : Extended Capability Port mode. EPP+ECP : ECP Mode & EPP Mode.

ECP Mode USE DMA: This field allows the user to sellect DMA1 or DMA3 for the ECP mode. The default value is DMA3.

DMA1 : The filed selects the rounting of DMA1 for the ECP mode. DMA3 : The filed selects the rounting of DMA3 for the ECP mode.

4-7 LOAD SETUP DEFAULTS

The "LOAD SETUP DEFAULTS" function loads the system default data directly from ROM and initializes the associated hardware properly. This function will be necessary only when the system CMOS data is corrupted.

AWARD BIOS 4-15

ROM PCI/ISA BIOS(2A5LDPAB)

CMOS SETUP UTILITY

AWARD SOFTWARE, INC.

LOAD SETUP DEFAULTS

ESC: QUIT :SELECT ITEM F10:Save & Exit Setup (Shift)F2 :Change Color

Load Setup Defaults Except Standard COMS SETUP

Load SETUP Default (Y/N)? Y

Figure 4-8 LOAD SETUP DEFAULT

4-8 CHANGE SUPERVISOR or USER PASSWORD

To change the password, choose the "SUPERVISOR PASSWORD or USER PASSWORD " option from the CMOS SETUP UTILITY menu and press [Enter].

NOTE : Either " Setup" or "System" must be selected in the "Security Option" of the

BIOS FEATURES SETUP menu (Refer to Figure 4-3 for the details).

1. If CMOS is corrupted or the option is not used, a default password stored in the ROM

will be used. The screen will display the following message:

Enter Password:

Press the [Enter] key to continue after proper password is given.

2. If CMOS is corrupted or the option was used earlier and the user wish to change

default password, the SETUP UTILITY will display a message and ask for a confirmation.

Confirm Password:

3. After pressing the [Enter] key (ROM password if the option was not used) or current

password (user-defined password), the user can change the password and store new one in CMOS RAM. A maximum of 8 characters can be entered.

4-16 CHAPTER 4

4-9 IDE HDD AUTO DETECTION

The "IDE HDD AUTO DETECTION" utility is a very useful tool especially when you do not know which kind of hard disk type you are using. You can use this utility to detect the correct disk type installed in the system automatically. But now you can set HARD DISK TYPE to Auto in the STANDARD CMOS SETUP. You do not need the "IDE HDD AUTO DETECTION" utility. The BIOS will Auto-detect the hard disk size and model on display during POST.

ROM PCI/ISA BIOS(2A5LDPA9)

CMOS SETUP UTILITY

AWARD SOFTWARE, INC.

HARD DISKS TYPE SIZE CYLS HEADS PRECOMP LANDZONE SECTORS MODE

Primary Master : 343 665 16 65535 664 63 NORMAL Primary Slave : Secondary Master : Secondary Slave :

Select Secondary Slave Option (N=Skip) : N

OPTIONS SIZE CYLS HEAD PRECOMP LANDZ SECTOR MODE

1 (Y) 0 0 0 0 0 0 NORMAL

ESC : Skip

Figure 4-9 IDE HDD AUTO DETECTION

NOTE: HDD Modes

The Award BIOS supports 3 HDD modes : NORMAL, LBA and LARGE NORMAL mode.

Generic access mode that is neither the BIOS nor the IDE controller will make transformations during accessing.

The maximum nunbers of cylinders, head & sectors for NORMAL mode are 1024, 16 and 63.

no. Cyclinder (1024) x no. Head ( 16) x no. Sector ( 63) x no. per sector ( 512) 528 Megabytes

If user sets his HDD to NORMAL mode, the maximum accessible HDD size will be 528 Megabytes even though its physical size may be greater than that!

AWARD BIOS 4-17

LBA (Logical Block Addressing) mode: This is a new HDD accessing method to overcome the 528 Megabyte bottleneck.

The number of cylinders, heads and sectors shown in the setup may not be the number physically contained in the HDD.

During the HDD accessing, the IDE controller will transform the logical address described by sector, head and cylinder into its own physical address inside the HDD.

The maximum HDD size supported by LBA mode is 8.4 Gigabytes which is obtained by the following formula:

no. Cyclinder (1024) x no. Head ( 255) x no. Sector ( 63) x bytes per secttor ( 512)

8.4 Gigabytes

LARGE mode: This is an extended HDD access mode supported by Award Software.

Some IDE HDDs contain more than 1024 cylinders without LBA support (in some cases, user does not want LBA). The Award BIOS provides another alternative to support these kinds of LARGE mode:

CYLS. HEADS SECTOR MODE 1120 16 59 NORMAL 560 32 59 LARGE

BIOS tricks DOS (or other OS) that the number of cylinders is less than 1024 by dividing it by 2. At the same time, the number of heads is multiplied by 2. A reverse transformation process will be made inside INT 12h in order to access the right HDD address

Maximum HDD size:

no. Cyclinder (1024) x no. Head ( 32) x no. Sector ( 63) x bytes per sector ( 512) 1 Gigabytes

4-18 CHAPTER 4

Note:

To support LBA or LARGE mode of HDDs, there must be some softwares involved. All softwares are located in the Award HDD Service Routine (1NT 13h). It may fail to access a HDD with LBA (LARGE) mode selected if you are running under on Operating System which replaces the whole 1NT 13h. UNIX operating systems do not support either LBA or LARGE and must utilize the Standard mode. UNIX can support drives larger than

528MB.

4-10 HDD LOW LEVEL FORMAT

Interleave

Select the interleave number of the hard disk drive that you wish to perform a low level format on. You may select from 1 to 8. Check the documentation that came with the drive for the correct interleave number, or select 0 for automatic detection.

Auto scan bad track

This allows the utility to scan first then format by each track.

Start

Press<Y>to start low level format.

4-11 SAVE & EXIT SETUP

The "SAVE & EXIT SETUP" option will bring you back to boot up procedure with all the changes you just recorded in the CMOS RAM.

4-12 EXIT WITHOUT SAVING

The "EXIT WITHOUT SAVING" option will bring you back to normal boot up procedure without saving any data into CMOS RAM. All old data in the CMOS will not be destroyed.

TECHNICAL INFORMATION 5-1

Chapter 5

Technical Information

5-1 I/O & MEMORY MAP

MEMORY MAP Address Range Size Description

[00000-7FFFF] 512K Conventional memory [80000-9FBFF] 127K Extended Conventional memory [9FC00-9FFFF] 1K Extended BIOS data area if PS/2 mouse is installed [A0000-C7FFF] 160K Available for Hi DOS memory [C8000-DFFFF] 96K Available for Hi DOS memory and adapter ROMs [E0000-EEFFF] 60K Available for UMB [EF000-EFFFF] 4K Video service routine for Monochrome & CGA adaptor [F0000-F7FFF] 32K BIOS CMOS setup utility [F8000-FCFFF] 20K BIOS runtime service routine (2) [FD000-FDFFF] 4K Plug and Play ESCD data area [FE000-FFFFF] 8K BIOS runtime service routine (1)

I/O MAP [000-01F] DMA controller.(Master)

[020-021] INTERRUPT CONTROLLER.(Master) [022-023] CHIPSET control registers. I/O ports. [040-05F] TIMER control registers. [060-06F] KEYBOARD interface controller.(8042) [070-07F] RTC ports & CMOS I/O ports. [080-09F] DMA register. [0A0-0BF] INTERRUPT controller.(Slave) [0C0-0DF] DMA controller.(Slave) [0F0-0FF] MATH COPROCESSOR. [1F0-1F8 ] HARD DISK controller. [278-27F] PARALLEL port 2. [2B0-2DF] GRAPHICS adapter controller. [2F8-2FF] SERIAL port 2. [360-36F] NETWORK ports. [378-37F] PARALLEL port 1. [3B0-3BF] MONOCHROME & PARALLEL port adapter. [3C0-3CF] EGA adapter. [3D0-3DF] CGA adapter. [3F0-3F7] FLOPPY DISK controller. [3F8-3FF] SERIAL port 1.

5-2 CHAPTER 4

5-2 TIME & DMA CHANNELS MAP

TIME MAP: TIMER Channel 0 System timer interrupt.

TIMER Channel 1 DRAM REFRESH request. TIMER Channel 2 SPEAKER tone generator.

DMA CHANNELS : DMA Channel 0 Available.

DMA Channel 1 Onboard ECP (Option). DMA Channel 2 FLOPPY DISK (SMC CHIP).

DMA Channel 3 Onboard ECP (default). DMA Channel 4 Cascade for DMA controller 1. DMA Channel 5 Available. DMA Channel 6 Available.

DMA Channel 7 Available.

5-3 INTERRUPT MAP

NMI : Parity check error.

IRQ (H/W) : 0 System TIMER interrupt from TIMER 0.

1 KEYBOARD output buffer full. 2 Cascade for IRQ 8-15. 3 SERIAL port 2. 4 SERIAL port 1. 5 PARALLEL port 2. 6 FLOPPY DISK (SMC CHIP). 7 PARALLEL port 1. 8 RTC clock. 9 Available. 10 Available. 11 Available. 12 PS/2 Mouse. 13 MATH coprocessor. 14 Onboard HARD DISK(IDE1) channel. 15 Onboard HARD DISK(IDE2) channel.

TECHNICAL INFORMATION 5-3

5-4 RTC & CMOS RAM MAP

RTC & CMOS : 00 Seconds.

01 Second alarm.

02 Minutes.

03 Minutes alarm. 04 Hours. 05 Hours alarm.

06 Day of week. 07 Day of month. 08 Month. 09 Year.

0A Status register A. 0B Status register B. 0C Status register C.

0D Status register D.

0E Diagnostic status byte.

0F Shutdown byte.

10 FLOPPY DISK drive type byte.

11 Reserve.

12 HARD DISK type byte. 13 Reserve. 14 Equipment type.

15 Base memory low byte. 16 Base memory high byte.

17 Extension memory low byte.

18 Extension memory high byte. 19-2d

2E-2F

30 Reserved for ectension memory low bytw.

31 Reserved for extension memory high byte.

32 DATE CENTURY byte.

33 INFORMATION FLAG. 34-3F Reserve.

40-7F Reserved for CHIPSET SETTING DATA.

5-4 CHAPTER 4

APPENDIX A: POST CODES

ISA POST codes are typically output to port address 80h.

POST(hex) DESCRIPTION 01-02

Reserved.

Turn off OEM specific cache, shadow.

1.Initialize EISA registers (EISA BIOS only).

2.Initialize all the standard devices with default values Standard devices includes.

-DMA controller (8237).

-Programmable Interrupt Controller (8259).

-Programmable Interval Timer (8254).

-RTC chip.

Reserved

1.Keyboard Controller Self-Test.

2.Enable Keyboard Interface.

Reserved.

Verifies CMOS's basic R/W functionality.

Auto-detection of onboard DRAM & Cache.

Copy the BIOS from ROM into E0000-FFFFF shadow RAM so that POST will go faster.

Test the first 256K DRAM.

OEM specific cache initialization. (if needed)

1.Initialize the first 32 interrupt vectors with corresponding Interrupt handlers Initialize INT no from 33-120 with Dummy (Suprious) Interrupt Handler.

2.Issue CPUID instruction to identify CPU type.

3.Early Power Management initialization. (OEM specific)

1.Verify the RTC time is valid or not.

2.Detect bad battery.

3.Read CMOS data into BIOS stack area.

4.PnP initializations including. (PnP BIOS only)

-Assign CSN to PnP ISA card.

-Create resource map from ESCD.

5.Assign IO & Memory for PCI devices. (PCI BIOS only)

POST(hex) DESCRIPTION

TECHNICAL INFORMATION 5-5

12-13

Initialization of the BIOS Data Area. (40:ON - 40:FF)

1.Program some of the Chipset's value according to Setup. (Early Setup Value Program)

2.Measure CPU speed for display & decide the system clock speed.

3.Video initialization including Monochromc, CGA, EGA/VGA. If no display device found, the speaker will beep.

1.Test video RAM. (If Monochromc display device found)

2.Show messages including.

-Award Logo, Copyright string, BIOS Data code & Part No.

-OEM specific sign on messages.

-Energy Star Logo. (Green BIOS ONLY)

-CPU brand, type & speed.

-Test system BIOS checksum. (Non-Compress Version only)

DMA channel 0 test.

DMA channel 1 test.

DMA page registers test.

Reserved.

Test 8254 Timer 0 Counter 2.

Test 8259 interrupt mask bits for channel 1.

1A-1D

1F-29

Test 8259 interrupt mask bits for channel 2.

Reserved.

Test 8259 functionality.

Reserved.

If EISA NVM checksum is good, exccute EISA initialization. (EISA BIOS only)

Reserved.

Detect Base Memory & Extended Memory Size.

1.Test Base Memory from 256K to 640K.

2.Test Extended Memory from 1M to the top of memory.

5-6 CHAPTER 4

POST(hex) DESCRIPTION 32

33-3B

3F-40

1.Display the Award Plug & Play BIOS Extension message. (PnP BIOS only)

2.Program all onboard super I/O chips (if any) including COM ports, LPT ports, FDD port ... according to setup value.

Reserved.

Set flag to allow users to enter CMOS Setup Utility.

1.Initialize Keyboard.

2.Install PS2 mouse.

Try to turn on Level 2 cache. Note : Some chipset may need to turn on the L2 cache in this stage. But usually, the cache is turn on later in POST 61h.

Reserved.

1.Program the rest of the Chipset's value according to Setup. (Later Setup Value Program)

2.If auto-configuration is enabled, programmed the chipset with pre-defined Values.

Initialize floppy disk drive controller.

Initialize Hard drive controller.

If it is a PnP BIOS, initialize serial & parallel ports.

46-4D

Reserved.

Initialize math coprocessor.

Reserved.

If there is any error detected (such as video, kb...), show all the error messages on the screen & wait for user to press <F1> key.

1.If password is needed, ask for password.

2.Clear the Energy Star Logo. (Green BIOS only)

Write all CMOS values currently in the BIOS stack area back into the CMOS.

Reserved.

POST(hex) DESCRIPTION

TECHNICAL INFORMATION 5-7

1.Initialize all ISA ROMs.

2.Later PCI initializations. (PCI BIOS only)

-assign IRQ to PCI devices.

-initialize all PCI ROMs.

3.PnP Initialzations. (PnP BIOS only)

-assign IO, Memory, IRQ & DMA to PnP ISA devices.

-initialize all PnP ISA ROMs.

4.Program shadows RAM according to Setup settings.

5.Program parity according to Setup setting.

6.Power Management Initialization.

-Enable/Disable global PM.

-APM interface initialization.

1.If it is NOT a PnP BIOS, initialize serial & paralled ports.

2.Initialize time value in BIOS data area by translate the RTC time value into a timer tick value.

Setup Virus Protection. (Boot Sector Protection) functionality according to Setup setting.

1.Try to turn on Level 2 cache. Note : if L2 cache is already turned on in POST 3D, this part will be skipped.

2.Set the boot up speed according to Setup setting.

3.Last chance for Chipset initialization.

4.Last chance for Power Management initialization. (Green BIOS only)

5.Show the system configuration table.

1.Setup daylight saving according to Setup value.

2.Program the NUM Lock, typematic rate & typematic speed according to Setup setting.

1.If there is any changes in the hardware configuration, update the ESCD information. (PnP BIOS only)

2.Clear memory that have been used.

3.Boot system via INT 19H.

System Booting. This means that the BIOS already pass the control right to the operating system.

Unexpected Errors: POST(hex) DESCRIPTION

If interrupt occurs in protected mode.

Unclaimed NMI occurs.

5-8 CHAPTER 4

APPENDIX B: I/O CONNECTORS

JP1 : PS/2 MOUSE CONNECTOR:

Pin Signal Name

1 Data (Red Wire)

2 Clock (Blue Wire) 3 GND (Green Wire) 4 NC 5 VCC (Yellow Wire)

CN2/COM1,CN3/COM2 : Serial Ports Connector

1 6

Signal Name Pin Pin Signal Name

5 10

DCD SIN SOUT DTR GND

1 6 DSR 2 7 RTS 3 8 CTS 4 9 RI 5 10 N.C.

CN5 : Parallel Port Connector

Signal Name Pin Pin Signal Name

1 14

13 26

STROBEData Bit 0 Data Bit 1 Data Bit 2 Data Bit 3 Data Bit 4 Data Bit 5 Data Bit 6 Data Bit 7 ACJBUSY PE

SLCT

1 14 AUTO FEED 2 15 ERROR 3 16 INIT 4 17 SLCT IN 5 18 Ground 6 19 Ground 7 20 Ground 8 21 Ground 9 22 Ground 10 23 Ground 11 24 Ground 12 25 Ground 13 26 N.C.

CN6 : Floppy Disk Connector

Signal Name Pin Pin Signal Name

TECHNICAL INFORMATION 5-9

1 2

33 34

Ground Ground

Ground

Ground Ground Ground Ground Ground

Ground

Ground Ground Ground Ground

Ground

Ground Ground Ground

1 2 FDHDIN 3 4 Reserved 5 6 FDEDIN 7 8 Index 9 10 Motor Enable 11 12 Drive Select B13 14 Drive Select A15 16 Motor Enable 17 18 DIR19 20 STEP21 22 Write Data 23 24 Write Gate 25 26 Track 0027 28 Write Protect29 30 Read Data31 32 SIDE 1 SELECT33 34 Diskette

CN8/CN7 : Primary, Secondray IDE Connector

1 2

39 40

Signal Name Pin Pin Signal Name

Reset IDE Host Data 7 Host Data 6 Host Data 5 Host Data 4 Host Data 3 Host Data 2 Host Data 1 Host Data 0 Ground DRQ3 I/O WriteI/O ReadIOCHRDY DACK3IRQ14 Addr 1 Addr 0 Chip Select 0Activity

1 2 Ground 3 4 Host Data 8 5 6 Host Data 9 7 8 Host Data 10 9 10 Host Data 11 11 12 Host Data 12 13 14 Host Data 13 15 16 Host Data 14 17 18 Host Data 15 19 20 Key 21 22 Ground 23 24 Ground 25 26 Ground 27 28 BALE 29 30 Ground 31 32 IOCS1633 34 Ground 35 32 Addr 2 37 38 Chip Select 139 40 Ground

5-10 CHAPTER 4

CN4: USB Connector: 1

USB Port 1

USB Port 2

PS/2 Mouse Connector

Figure 5-1 USB Port Adapter

Pentium P55VPX User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual