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Memory Module Installation (See Figure 2-2)
1. Insert each memory module vertically into a DIMM slot. Pay attention to the two notches along the bottom of the module to prevent inserting the module incorrectly. Gently press down on the memory module until it snaps into place. Three PC 133 SDRAM sockets support up to 3 GB PC133/PC100 unbuffered SDRAM. ECC type memory is supported. PC133 and PC100 memory are both fully supported at their respective speeds.
Figure 2-2. DIMM Installation/Removal
To Install: Insert module vertically and press down until it snaps into place. Pay attention to the two notches.
To Remove: Use your thumbs gently to push each release tab outward to release the DIMM from the slot.
I/O Port/Control Panel Connector Locations
The I/O ports are color coded in conformance with the PC99 specification to make setting up your system easier. See Figure 2-3 below for the colors and locations of the various I/O ports.
Figure 2-3. Mouse (Green)
I/O Port Locations and Definitions Parallel Port (Burgundy)

Keyboard (Purple)

USB0/1 Ports

COM1 Port (Turquoise)

VGA Port (Blue)

Front Control Panel

JF1 contains header pins for various front control panel connectors. See Figure 2-4 for the pin definitions of the Power and Reset buttons and the Overheat, NIC1, NIC2, HDD and Power LEDs, which are all located on JF1. Refer to the following section for more details. Figure 2-4. Front Control Panel Connectors
16 Control Control Control Control Control 15 5V 5V 3V 3V 5V
Power LED HDD LED NIC1 LED NIC2 LED Overheat LED X

Ground Ground 2 1

Reset Button Power Button
Connecting Cables (see previous page for locations)

Power Supply Connector

ATX Power Supply 24-pin Connector Pin Definitions (JJ21) Pin Number Definition Pin Number Definition 1 +3.3V 13 +3.3V 2 +3.3V 14 -12V 3 COM 15 COM 4 +5V 16 PS_ON# 5 COM 17 COM 6 +5V 18 COM 7 COM 19 COM 8 PW R_OK 20 Res(NC) 9 5VSB 21 +5V 10 +12V 22 +5V 11 +12V 23 +5V 12 +3.3V 24 COM
The primary power supply connector on the P4SBR/P4SBE meets the SSI (Superset ATX) 24-pin specifications; however, it also supports an ATX 20-pin connector. Thus, both 20-pin ATX and 24-pin SSI connectors can be used as long as it is correctly oriented. (Make sure that pin 1 of the PS connector is seated on pin 1 of the JJ21 header.) See the tables on the right for the pin definitions of both types. Refer to Figure A below for a 24-pin connector orientation and Figure B for a 20pin connector orientation. Also see the table below right for JJ24 (12V connector) pin definitions.

Infrared Pin Definitions (J45) Pin Number Definition +5V 1 CIRR X 2 IRR X 3 Ground 4 IRT X 5 NC 6

Fan Headers

Fan H eader Pin Definitions (C PU/CHS/OH Fans)
The motherboard has CPU, chassis and overheat fan headers designated CPU, CHS F1, CHS FAN2 and OH FAN, respectively. See the table on the right for pin definitions.

Pin Number 3

Definition Ground (black) +12V (red) Tachometer
Caution: These fan headers are D C power.

Wake-On-LAN

The Wake-On-LAN header is designated as "WOL". Refer to the table on the right for pin definitions. You must enable the LAN Wake-Up setting in BIOS to use this function. (You must also have a LAN card with a Wake-on-LAN connector and cable to use this feature.)
W ake-On-LAN Pin Definitions (W OL) Pin Number 3 Definition +5V Standby Ground W ake-up
SUPER P4SBR/P4SBE User's Manual SCSI LED Indicator (P4SBR only)
The SCSI LED connector is used to provide an LED indication of SCSI activity. See the table on the right for pin definitions.
SCSI LED Pin Definitions (SCSI LED) Pin Definition Number Positive 1 Negative 2 Negative 3 Positive 4

PWR LED

Attach an LED to the Power LED connection to be informed that power is being supplied to the motherboard. Refer to the table on the right for pin definitions.
Power LED Pin Definitions (PW R LED) Pin Number 3 Definition +5V Control Control

Wake-On-Ring

The Wake-On-Ring header is designated as "JWOR". This function allows your computer to receive and be "awakened" by an incoming call when in the suspend state. See the table on the right for pin definitions. You must also have a WOR card and cable to use WOR.
W ake-On-Ring Pin Definitions (JW OR) Pin Number Definition Ground W ake-up

Chassis Intrusion

The Chassis Intrusion header is located on JL1. See the table on the right for pin definitions.
Chassis Intrusion Pin Definitions (JL1) Pin Number Definition 1 Intrusion Input 2 Ground

Speaker

A header for an external speaker is located near JWOR. If using the onboard speaker, pins 1 and 2 should be closed with a jumper. If you wish to use an external speaker, you may connect it to this header. See the table on the right for pin definitions.
Speaker Connector Pin Definitions (Speaker) Pin Number Function Definition 1 + Red wire, Speaker data 2 Key No connection 3 Key 4 Speaker data

Jumper Settings

Use jumper JP34 to enable or disable the onboard SCSI on your motherboard. See the table on the right for jumper settings.
SCSI Enable/Disable Jumper Settings (JP34) Jumper Position Pins 1-2 Pins 2-3
Definition Enabled Disabled

LAN1/LAN2

Use jumper JP35/JP31 to enable or disable LAN 1/LAN 2, respectively. See the table on the right for jumper settings.
LAN1/2 Enable/Disable Jumper Settings (J35, J31) Jumper Position Open Closed Definition Disabled Enabled
Overheat Fan Enable/Disable
JP38 allows you to enable or disable the overheat (thermal) fan. When enabled, the fan will operate continuously. When disabled, it will operate only when a predefined temperature threshold has been exceeded. See the table on the right for jumper settings.
T hermal Fan Enable/Disable Jumper Settings (JP38) Jumper Position Open Closed Definition Disabled Enabled

Watchdog Enable/Disable

Jumper JP39 allows you to enable or disable the Watchdog feature. The normal (default) position is closed to disable the watchdog timer and enable the speaker. See the table on the right for jumper settings.
W atchdog Enable/Disable Jumper Settings (JP39) Jumper Position Open Closed Definition Disabled Enabled

Keyboard Wake-Up

The JPWAKE jumper is used together with the Keyboard WakeUp function in BIOS. Enable both the jumper and the BIOS setting to allow the system to be woken up by depressing a key on the keyboard. See the table on the right for jumper settings. Note: Your power supply must meet ATX specification 2.01 or higher and supply 720mA of standby power to use this feature.
Keyboard W ake-Up Jumper Settings (JPW AKE) Jumper Position 1-2 2-3 Definition Disabled Enabled
Parallel Port, Floppy/Hard Drive and SCSI Connections
Use the following information to connect the floppy and hard disk drive cables. The floppy disk drive cable has seven twisted wires. A red mark on a wire typically designates the location of pin 1. A single floppy disk drive ribbon cable has 34 wires and two connectors to provide for two floppy disk drives. The connector with twisted wires always connects to drive A, and the connector that does not have twisted wires always connects to drive B. The 80-wire ATA66/100 IDE hard disk drive cable that came with your system has two connectors to support two drives. This special cable should be used to take advantage of the speed this new technology offers. The blue connector connects to the onboard IDE connector interface and the other connector(s) to your hard drive(s). Consult the documentation that came with your disk drive for details on actual jumper locations and settings for the hard disk drive.

Parallel Port Connector

The parallel port is located on J35. See the table on the right for pin definitions.
Parallel (Printer) Port Pin Definitio ns (J35) Pin Number 25 Function Pin Number Function Strobe2 Auto FeedData Bit ErrorData Bit InitData Bit SLCT INData Bit GND Data Bit GND Data Bit GND Data Bit GND Data Bit GND ACK 20 GND BUSY 22 GND PE 24 GND SLCT 26 NC

Floppy Connector

The floppy connector is located on JP26. See the table on the right for pin definitions.
Floppy Connector Pin Definitions (JP26) Function GND GND Key GND GND GND GND GND GND GND GND GND GND GND GND GND GND Pin Number Function 2 FDHDIN 4 Reserved 6 FDEDIN 8 Index10 M otor Enable 12 D rive Select B14 D rive Select A16 M otor Enable 18 DIR20 STEP22 W rite Data24 W rite Gate26 Track 0028 W rite Protect30 Read Data32 Side 1 Select34 Diskette

Pin Number 33

IDE Connectors
There are no jumpers to configure the onboard IDE interfaces J18 and J19. See the table on the right for pin definitions. You must use the ATA100/66 cable included with your system to benefit from the ATA100/66 technology.
IDE Connector Pin Definitions (J18, J19) Pin Number Function 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 GND DRQ3 I/O W riteI/O ReadIOCHRDY DACK3IRQ14 Addr 1 Addr 0 Chip Select 0 Activity Pin Number Function G ND Host Data 8 Host Data 9 Host Data 10 Host Data 11 Host Data 12 Host Data 13 Host Data 14 Host Data 15 Key G ND G ND G ND BALE G ND IOC S16G ND Addr 2 Chip Select 1G ND
SUPER P4SBR/P4SBE User's Manual Ultra160 SCSI Connectors
Refer to the table below for the pin definitions of the Ultra160 SCSI connectors located at JA1, JA2 and JA3.
68-pin Ultra160 SCSI Co nnectors (JA1, JA2, JA3) Connector Contact Number Connector Contact Number 67 68
Signal Names +D B(12) +D B(13) +D B(14) +D B(15) +D B(P1) +DB(0) +DB(1) +DB(2) +DB(3) +DB(4) +DB(5) +DB(6) +DB(7) +DB(P) GR OUND DIF FSENS TER MPW R TER MPW R RESERVED GR OUND +ATN GR OUND +BSY +ACK +RST +MSG +SEL +C/D +REQ +I/O +DB(8) +DB(9) +D B(10) +D B(11)
Signal Names -DB(12) -DB(13) -DB(14) -DB(15) -DB(P1) -DB(0) -DB(1) -DB(2) -DB(3) -DB(4) -DB(5) -DB(6) -DB(7) -DB(P) GROUND GROUND TERMPW R TERMPW R RESERVED GROUND -ATN GROUND -BSY -ACK -RST -MSG -SEL -C/D -REQ -I/O -DB(8) -DB(9) -DB(10) -DB(11)
Installing Software Drivers
After all the hardware has been installed, you must install, first of all, the operating system, and then, the software drivers. The necessary drivers are all included on the Supermicro CD that came packaged with your motherboard. After inserting this CD into your CDROM drive, the display shown in Figure 2-5 should appear. (If this display does not appear, click on the My Computer icon and then on the icon representing your CDROM drive. Finally, double click on the S "Setup" icon.)

Figure 2-5. Driver/Tool Installation Display Screen Click the icons showing a hand writing on paper to view the readme files for each item. Click the tabs to the right of these in order from top to bottom to install each item one at a time. After installing each item, you must reboot the system before moving on to the next item on the list. You should install everything here except for the SUPER Doctor utility, which is optional. The Security and Graphics Drivers support multiple languages. Click the arrows to pull down a menu of choices. The bottom icon with a CD on it allows you to view the entire contents of the CD. Note: The memory size reported in the device manager may be less than expected because some is used by the onboard graphics. Higher screen resolutions will take up more of this memory.
Chapter 3 Troubleshooting
3-1 Troubleshooting Procedures
Use the following procedures to troubleshoot your system. If you have followed all of the procedures below and still need assistance, refer to the Technical Support Procedures and/or Returning Merchandise for Service section(s) in this chapter. Note: Always disconnect the power cord before adding, changing or installing any hardware components.

Before Power On

1. Make sure no short circuits exist between the motherboard and chassis. 2. Disconnect all ribbon/wire cables from the motherboard, including those for the keyboard and mouse. 3. Remove all add-on cards. 4. Install a CPU (making sure it is fully seated) and connect the chassis speaker and the power LED to the motherboard. (Check all jumper settings as well.)

No Power

1. Make sure no short circuits exist between the motherboard and the chassis. 2. Verify that all jumpers are set to their default positions. 3. Check that the 115V/230V switch on the power supply is properly set. 4. Turn the power switch on and off to test the system. 5. The battery on your motherboard may be old. Check to verify that it still supplies ~3VDC. If it does not, replace it with a new one.

No Video

1. If the power is on but you have no video, remove all the add-on cards and cables. 2. Use the speaker to determine if any beep codes exist. Refer to Appendix A for details on beep codes.

If you are a system integrator, VAR or OEM, a POST diagnostics card is recommended. For I/O port 80h codes, refer to App. B.

Memory Errors

1. Make sure the DIMM modules are properly and fully installed in each slot. 2. Determine if different speeds of DIMMs have been installed and verify that the BIOS setup is configured for the fastest speed of memory used. It is recommended to use the same memory speed for all DIMMs in the system. 3. Check for bad DIMM modules or slots by swapping modules between slots and noting the results. 4. Check the power supply voltage 115V/230V switch.
Losing the Systems Setup Configuration
1. Check the setting of jumper JBT1. Ensure that you are using a high quality power supply. A poor quality power supply may cause the system to lose the CMOS setup information. Refer to Section 1-6 for details on recommended power supplies. 2. The battery on your motherboard may be old. Check to verify that it still supplies ~3VDC. If it does not, replace it with a new one. 3. If the above steps do not fix the Setup Configuration problem, contact your vendor for repairs.
Technical Support Procedures
Before contacting Technical Support, please take the following steps. Also, note that as a motherboard manufacturer, Supermicro does not sell directly to end-users, so it is best to first check with your distributor or reseller for troubleshooting services. They should know of any possible problem(s) with the specific system configuration that was sold to you.
1. Please go through the Troubleshooting Procedures and 'Frequently Asked Question' (FAQ) sections in this chapter or see the FAQs on our web site (http://www.supermicro.com/techsupport.htm) before contacting Technical Support. 2. BIOS upgrades can be downloaded from our web site at http://www.supermicro.com/techsupport/download.htm. Note: Not all BIOS can be flashed depending on the modifications to the boot block code. 3. If you still cannot resolve the problem, include the following information when contacting Supermicro for technical support: Motherboard model and PCB revision number BIOS release date/version (this can be seen on the initial display when your system first boots up) System configuration An example of a Technical Support form is on our web site at http://www.supermicro.com/techsupport/contact_support.htm. 4. Distributors: For immediate assistance, please have your account number ready when placing a call to our technical support department. We can be reached by e-mail at support@supermicro.com or by fax at (408) 503-8019.
Frequently Asked Questions
Question: What are the various types of memory that the P4SBR/ P4SBE motherboard can support? Answer: The P4SBR/P4SBE has three 168-pin DIMM slots that support up to 3 GB MB. ECC memory and Parity Checking are supported. The 600/800 MHz memory bus fully supports both PC133 and PC100 memory. Question: How do I update my BIOS? Answer: It is recommended that you do not upgrade your BIOS if you are not experiencing problems with your system. Updated BIOS files are located on our web site at http://www.supermicro.com. Please check our BIOS warning message and the info on how to update your BIOS on our web site. Also, check the current BIOS revision and make sure it is newer than your BIOS before downloading. Select your motherboard model and download the BIOS file to your computer. Unzip the BIOS update file and you will find the readme.txt (flash instructions), the fwhflash.com (BIOS flash utility) and the BIOS image (xxxxxx.rom) files. Copy these files onto

Press DEL to enter SETUP

Main BIOS Setup
All Main Setup options are described in this section. The Main BIOS Setup screeen is displayed below. Use the <Up> <Down> arrow keys or the <Tab> key to move among the different settings in the above menu. Press the <Esc> key to exit theCMOS Setup Menu and use the <Left> <Right> arrow keys to enter the the other categories of BIOS settings. The next section is described in detail to illustrate how to navigate through the menus.

Main BIOS Setup Menu

Date/Time
Set the system date and time. Key in the correct information in the "mm", "dd" and "yy" fields. Press the "Enter" key to save the data.

Drive A/Drive B

These settings allow the user to set the type of floppy disk drive installed in the system. The options are "None", "360K, 5.25 in", "1.2M, 5.25 in", "720K, 3.5 in", "1.44M, 3.5 in" and "2.88M, 3.5 in". Default settings are "1.44, 3.5" in for Drive A and "None" for Drive B.

Swap Floppy Drive

This setting allows the user to swap the designation (A and B) of the floppy disk drives installed in the system (if there are two floppy disk drives installed on the mainboard). The options are "Disabled" and "Enabled".
IDE Primary Master/IDE Primary Slave/IDE Secondary Master/IDE Secondary Slave
These options allow the user to set the parameters of the IDE Primary Master/Slave and IDE Secondary Master/Slave slots. Press "Enter" to activate the following sub-menu screen for detailed options of these items. Set the correct configurations accordingly. The items included in the submenu are listed below:

IDE HDD Auto-Detection

Press the <Enter> key to activate the "IDE HDD Auto-Detection" function, which will allow BIOS to automatically detect the status of the IDE HDD installed in the system, such as the size and number of cylinders.

IDE Primary Master

This option allows the user to determine the manner in which the AwardBIOS sets the settings for the IDE Primary Master Device. The options are "None", "Auto" and "Manual."

Access Mode

This item determines the location through which the AwardBIOS accesses the IDE Primary Master Device. The settings are "CHS", "LBA", "Large", and "Auto".

IDE Primary Slave PIO

See the previous setting for description. The options for this setting are "Auto", "Mode 0", "Mode 1", "Mode 2", "Mode 3" and "Mode 4".

IDE Primary Master UDMA

This is available only when your IDE drive supports UDMA and the operating environment also includes a UDMA drive. If your IDE hard drive and your system software both support UDMA, select Auto to enabled BIOS support. The options for this setting are "Auto" and "Disabled".
Use this setting to specify the type of display you are using with the system. Options are "EGA/VGA", "CGA 40", "CGA 80" and "MONO".

Halt On

If the system encounters a non-specified error during boot-up, it will come to a halt as directed by these settings. You can tell the system to halt on "All Errors", "No Errors", "All, But Keyboard", "All, But Diskette" or "All, But Disk/Key".
Base Memory/Extended Memory/Total Memory
These are displays that inform you how much of each type of memory is recognized as being present in the system.

Advanced BIOS Setup

Choose Advanced BIOS Setup from the Award BIOS main menu with the Left/ Right arrow keys. You should see the following display. Select one of the items in the left frame of the screen to go to the sub screen for that item. Advanced BIOS Setup options are displayed by highlighting the option using the arrow keys. All Advanced BIOS Setup options are described in this section.

Advanced BIOS Features

When the item of Advanced BIOS Features is highlighted, press the <Enter> key to activate the screen below:

Init Display First

This setting allows the user to determine which device will be first displayed when the sytem boots up - a device installed in the PCI slot or a device intalled in the AGP slot. The options are "PCI slot" and "AGP".

DRAM Timing Selectable

This item regulates dynamic random access memory (DRAM) timing. The options are "Manual" and "By SPD".

CAS Latency TIme

This item regulates memory column address strobe (CAS) timing. The settings are "1.5", "2", "2.5" and "3".
Active to Precharge Delay
This item regulates the number of memory clock cycles allowed for memory refresh charging. The options are "7", "6" and "5". Shorter timings increase system memory throughput at the risk of lacking sufficient refresh charge.

DRAM RAS# to CAS# Delay

This item regulates the number of memory closk cycles between strobing a row address (RAS) and a column address (CAS). Shorter numbers of clock cycles improve system memory performance at the risk of missing data. The options are "3" and "2".

DRAM RAS Precharge

This item regulates the number of system memory clock cycles for RAS precharging. The options are "3" and "2".

DRAM Data Integrity Mode

This item regulates CPU access to the data stored in the protected area of dynamic random access memory (DRAM) on the motherboard. To preserve its integrity, critical system information is usually stored in a protected area of memory. If set to the "ECC" mode, the CPU will have access to data stored in the area when performing ECC (Error Correction/Checking) activities. The options are "ECC" and "Non-ECC".

Memory Frequency For

This item regulates system memory frequency. The options are "PC100", "PC133" and "Auto".
DRAM Read Thermal Management
This item regulates the system's ability to read system thermal data. The options are "Disabled" and "Enabled".

System BIOS Cacheable

If enabled, the system BIOS information stored in the BIOS ROM (Read Only Memory) chip will be written and temporarily stored in the "cacheable" memory section of the CPU, giving the CPU faster access to the information. The options are "Disabled" and "Enabled".

Video BIOS Cacheable

If enabled, the information regarding the Video BIOS stored in the BIOS ROM (Read Only Memory) chip will be written and temporarily stored in the "cacheable" memory section of the CPU, giving the CPU faster access to the information. The options are "Disabled" and "Enabled".

Video RAM Cacheable

If enabled, the information regarding the Video card stored in the RAM chip (Randon Access Memory) will be written and temporarily stored in the "cacheable" memory section of the CPU, giving the CPU faster access to the information. The options are "Disabled" and "Enabled".

Delayed Transaction

This setting compensates for the slower speed of ISA cards on a PCI interface and so is only relevant if ISA cards are present on the motherboard. The options are "Enabled" and "Disabled".

AGP Aperture size (MB)

This setting allows the user to set the aperture size for the Accelerated Graphics Port (AGP). The options are "4M", "8M", "16M", "32M", "64M", "128M" and "256M".

Delay Prior to Thermal

The options for this setting are "4 Min", "8 Min", "16 Min" and "32 Min".

Auto Detect PCI Clk

This setting allows the PCI clock rate to be automatically determined. The options for this setting are "Enabled" and "Disabled".

On-Chip Primary PCI IDE

The integrated peripheral controller contains an IDE interface with support for two IDE channels. Select Enabled to activate each channel separately. The options for this setting are "Enabled" and "Disabled".
On-Chip Secondary PCI IDE

USB Controller

You should Enable this setting if your system contains a Universal Serial Bus (USB) controller (it does) and you have USB peripherals. The options for this setting are "Enabled" and "Disabled".

USB Keyboard Support

If enabled, this setting allows the user to activate the BIOS support of the On-Chip USB Keyboard Controller. The options are "Disabled" and "Enabled".

Integrated Peripherals

When the item "Integrated Peripherals" is highlighted, press the <Enter> key to activate the following sub-menu screen.

Onboard FDC Controller

Select "Enabled", if your system has a floppy disk controller (FDC) installed on the main board and you wish to use it. The settings are "Enabled" and "Disabled".
Onboard Serial Port 1/Port 2
This setting allows the user to set the address and the corresponding IRQ for the Serial Port1 and Serial Port 2. The options are "Disabled" , "3F8/ IRQ4", "2F8/IRQ3", "3E8/IRQ4", "2E8/IRQ3", and "Auto". The default setting for Serial Port1 is "3F8/IRQ4" and the default for Port 2 is is "2F8/IRQ3".

Security Option

This setting allows the user to determine if the password is required every time when the system boots up or if the password is required only when you enter the CMOS setup. The options are "System" and "Setup".
Choose Exit from the Award BIOS main menu with the Left/Right arrow keys. You should see the following display:

Save & Exit Setup

When the item "Save & Exit Setup" is highlighted, press <Enter> to save the changes you've made in the BIOS program (CMOS) and exit. Your system should, then, continue with the boot-up procedure.

Exit without Saving

When the item "Exit without Saving" is highlighted, press <Enter> to exit the Setup routine without saving any changes you may have made. Your system should then continue with the boot-up procedure.

Load Fail-Safe Defaults

Highlight this item and hit <Enter> to load the default settings for all items in the BIOS Setup. These are the safest settings to use.

Load Optimized Defaults

Highlight this item and hit <Enter> to load the optimized settings for all items in the BIOS Setup. These settings provide you with optimal system performance.
Appendix A: AwardBIOS Post Messages
Appendix A AwardBIOS POST Messages
During the Power-On Self-Test (POST), the BIOS will check for errors. If an error is found and a correction is needed, the BIOS will activate an alarm or display a message. If a message is displayed, it will be accompanied by the following: PRESS F1 TO CONTINUE, CTRL-ALT-ESC OR DEL TO ENTER SETUP

POST Beep Codes

Currently, there are two kinds of beep codes used in AwardBIOS. One code indicates that a video error has occurred and that the BIOS cannot initialize the video screen to display any additional information. This beep code consists of a single long beep followed by two short beeps. The other code indicates that a Rambus error has occurred. This beep code consists of a single long beep that sounds repeatedly.

Error Messages

One or more of the following messages may be displayed if the BIOS detects an error during the POST. This list includes messages for both the ISA and the EISA BIOS.

CMOS BATTERY HAS FAILED

The CMOS battery is no longer functional. It should be replaced.

APPENDIX A

CMOS CHECKSUM ERROR
The CMOS hecksum is incorrect. This can indicate that CMOS has been corrupted. This error may have been caused by a weak battery. Check the battery and replace if necessary.

13h 14h 15h 16h 17h 18h 19h 1Ah 1Bh
1Ch 1Dh 1Eh 1Fh 20h 21h 22h 23h

24h 25h 26h 27h 28h 29h

2Ah 2Bh 2Ch
1. Initialize multi-language 2. Put information on screen display, including Award title, CPU type, CPU speed. Reserved Reserved Reserved Reserved Reserved Reset keyboard except Winbond 977 series Super I/O chips. Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Test 8254 Reserved Test 8259 interrupt mask bits for channel 1. Reserved Test 8259 interrupt mask bits for channel 2. Reserved Reserved Test 8259 functionality. Reserved Reserved Reserved Initialize EISA slot Reserved 1. Calculate total memory by testing the last double word of each 64K page. 2. Program writes allocation for AMD K5 CPU. Reserved Reserved Reserved Reserved 1. Program MTRR of M1 CPU 2. Initialize L2 cache for P6 class CPU & program CPU with proper cacheable range. 3. Initialize the APIC for P6 class CPU. 4. On MP platform, adjust the cacheable range to smaller one in case the cacheable ranges between each CPU are not identical. Reserved Initialize USB Reserved Test all memory (clear all extended memory to 0) Reserved Reserved Display number of processors (multi-processor platform) Reserved 1. Display PnP logo 2. Early ISA PnP initialization -Assign CSN to every ISA PnP device.
2Eh 2Fh 30h 31h 32h 33h 34h 35h 36h 37h 38h 39h 3Ah 3Bh 3Ch 3Dh 3Eh 3Fh 40h 41h 42h 43h 44h 45h 46h 47h 48h 49h 4Ah 4Bh 4Ch 4Dh 4Eh
4Fh 50h 51h 52h 53h 54h 55h 56h 57h
58h 59h 5Ah 5Bh 5Ch 5Dh 5Eh 5Fh 60h 61h 62h 63h 64h 65h 66h 67h 68h 69h 6Ah 6Bh 6Ch 6Dh
Reserved Initialize the combined Trend Anti-Virus code. Reserved (Optional Feature) Show message for entering AWDFLASH.EXE from FDD (optional) Reserved 1. Initialize Init_Onboard_Super_IO switch. 2. Initialize Init_Onboard_AUDIO switch. Reserved Reserved Okay to enter Setup utility; i.e. not until this POST stage can users enter the CMOS setup utility. Reserved Reserved Reserved Reserved Initialize PS/2 Mouse Reserved Prepare memory size information for function call: INT 15h ax=E820h Reserved Turn on L2 cache Reserved Program chipset registers according to items described in Setup & Auto-configuration table. Reserved 1. Assign resources to all ISA PnP devices. 2. Auto assign ports to onboard COM ports if the corresponding item in Setup is set to AUTO. Reserved 1. Initialize floppy controller 2. Set up floppy related fields in 40:hardware. Reserved Reserved Reserved (Optional Feature) Enter AWDFLASH.EXE if : -AWDFLASH is found in floppy drive. -ALT+F2 is pressed Reserved Detect & install all IDE devices: HDD, LS120, ZIP, CDROM. Reserved Detect serial ports & parallel ports. Reserved Reserved Detect & install co-processor Reserved Reserved Reserved Reserved 1. Switch back to text mode if full screen logo is supported. -If errors occur, report errors & wait for keys -If no errors occur or F1 key is pressed to continue: Clear EPA or customization logo.