WARNING: The use of shielded cables for connection of the monitor to the graphics card is required to assure compliance with FCC regulations. Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user's authority to operate this equipment.
Canadian Department of Communications Statement
This digital apparatus does not exceed the Class B limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications.

I. INTRODUCTION

This manual is divided into the following sections: I. Introduction: II. Features: III. Installation: IV. BIOS Setup: V. Software: VI. ASUS SCSI: VII. ASUS I-A16C: VIII. DOS/Win3.1x: IX. Windows 95: Manual information and checklist Information and specifications concerning this product Instructions on setting up the motherboard. BIOS software setup information. Information on the included support software Installation of an optional ASUS SCSI cards Installation of an optional 16-bit Audio card Audio Software Manual (with ASUS I-A16C bundle) Audio Software Manual (with ASUS I-A16C bundle) I. INTRODUCTION (Manual / Checklist) 1
How this manual is organized

Item Checklist

Please check that your package is complete. If you discover damaged or missing items, please contact your retailer. The ASUS P/I-P55T2P4 motherboard 2 serial port ribbon cables attached to a mounting bracket 1 parallel ribbon cable with mounting bracket 1 IDE ribbon cable 1 floppy ribbon cable Support drivers and utilities as follows: Flash Memory Writer utility to update the FLASH BIOS Desktop Management Interface (DMI) utility Bus Master IDE Drivers for various operating systems Audio drivers and utilities (included with ASUS I-A16C audio bundle only) Readme files for descriptions and use of the files Technical Support Form This user's manual (Audio sections included with ASUS I-A16C audio bundle) Optional infrared module Optional ASUS PCI-SC200 Fast-SCSI or PCI-SC860 Ultra-Fast SCSI card Optional ASUS I-A16C audio card Optional PS/2 mouse cable with mounting bracket Optional ASUS pipelined burst cache module
ASUS P/I-P55T2P4 Users Manual

II. FEATURES

Features of the ASUS Motherboard
The ASUS P/I-P55T2P4 is carefully designed for the demanding PC user who wants a great many features in a small package. This motherboard: Easy Installation: Is equipped with BIOS that supports auto detection of hard drives and Plug and Play to make setup of hard drives and expansion cards virtually automatic. Versatile Processor Support: Intel Pentium 75-233MHz (P55C-MMX, P54C/ P54CS), IBM/Cyrix 6x86-PR166+ (Rev 2.7 or later), IBM/Cyrix 6x86MX (PR166 & above), AMD-K5 (PR75-PR133), AMD-K6 (PR166-PR233). Intel Chipset: Features Intel's 430HX PCIset with I/O subsystems. Error Checking and Correcting (ECC): Using Intel's 430HX PCIset together with parity DRAM modules can detect multi-bit memory errors and correct 1bit memory errors. Desktop Management Interface (DMI): Supports DMI through BIOS which allows hardware to communicate within a standard protocol creating a higher level of compatibility (see section V). L2 Cache: Provides the option of 0KB upgradeable to 256KB or 512KB, onboard 256KB upgradeable to 512KB, or 512KB onboard Pipelined Burst SRAM. Upgrades are made through a Synchronous SRAM cache module. (See page 14 for compatible cache modules.) Versatile DRAM Memory Support: Supports 72-pin SIMMs of 4MB, 8MB, 16MB, 32MB, or 64MB to form a memory size between 8MB to 256MB. Supports both Fast Page Mode (FPM) and Extended Data Output (EDO) SIMMs. ISA and PCI Expansion Slots: Provides three 16-bit ISA slots, three 32-bit PCI slots, and one PCI/MediaBus 2.0 which allows the use of either a standard PCI card or the ASUS MediaBus Card. ASUS MediaBus Rev 2.0: Features an expansion slot extension shared with PCI Slot 4 for an optional high-performance expansion card which includes two functions in one easy-to-install card. (For revision compatibility information, please refer to page 18.) Super Multi-I/O: Provides two high-speed UART compatible serial ports and one parallel port with EPP and ECP capabilities. UART2 can also be directed from COM2 to the Infrared Module for wireless connections. Two floppy drives of either 5.25" or 3.5" (1.44MB or 2.88MB) are also supported without an external card. The Japanese "Floppy 3 mode" (3.5" 1.2MB) floppy standard is also supported.

III. INSTALLATION (Jumpers) 6
WARNING: Computer motheboards and components contain very delicate Integrated Circuit (IC) chips. To protect the motherboard and other components against damage from static electricity, you should follow some precautions whenever you work on your computer. 1. Unplug your computer when working on the inside. 2. Hold components by the edges and try not to touch the IC chips, leads, or circuitry. 3. Use a grounded wrist strap before handling computer components. 4. Place components on a grounded antistatic pad or on the bag that came with the component whenever the components are separated from the system.

Jumper Settings

1. Onboard Multi-I/O Selection (JP1) You can selectively disable each onboard Multi-I/O item (floppy, serial, parallel, and IrDA) through BIOS (see CHIPSET FEATURES SETUP) or disable all Multi-I/O items at once with the following jumper in order to use your own Multi-I/O card. Selections Enable Disable JP1 [1-2] (Default) [2-3]

JPEnable (Default) JP2 3

Multi I/O Setting (Enable / Disable)
2. Flash ROM Boot Block Programming (JP2) This sets the operation mode of the boot block area of the BIOS Flash ROM to allow programming in the Enabled position. Programming Disabled Enabled JP2 [1-2] (Default) [2-3]
JPDisabled (Default) JPEnabled
Boot Block Programming (Disable / Enable)
III. INSTALLATION (Jumpers)

Disabled

3. Total Level 2 Cache Size Setting (JP5) This jumper sets the total amount of L2 cache that is present. If you have both onboard cache chips (see "Map of Motherboard" for locations) and a Cache Expansion Slot, then you have 256KB. If you only have onboard cache chips, then you have 512KB. An "ASUS" or "COAST" cache module can be used to upgrade the 256KB version to 512KB. If there is no onboard cache, you may install a cache module of either 256KB or 512KB. IMPORTANT: See page 14 "SRAM Cache" for installation procedures. Regardless of your cache combination, set the following jumpers according to the total amount of L2 cache that is present onboard and installed as a module. Selections 256KB 512KB III. INSTALLATION (Jumpers) 8 JP5 [1-2] [2-3]

JP256KB JP512KB

Total L2 Cache Size Setting (256KB / 512KB)
4. Real Time Clock (RTC) RAM (JP7) This clears the user-entered information stored in the CMOS RAM of the Real Time Clock such as hard disk information and passwords. To clear the RTC data: (1) Turn off the PC, (2) Short this jumper, (3) Power on the PC, (4) Turn off the PC, (5) Remove this jumper, (6) Power on the PC, (7) Hold down <Delete> during bootup and enter BIOS setup to re-enter user preferences. Selections JP7 Operation [open] (Default) Clear Data [short] (momentarily)

Operation (Default)

Clear Data
RTC RAM (Operation / Clear Data)
5-6. Single/Dual Power Plane CPU Voltage Regulator Selections The following jumpers set the voltage supplied to the CPU. Determine whether your CPU has a Single Power Plane or Dual Power Planes and then the voltage that it uses. When a single power plane CPU is installed, the dual power plane selections will be automatically disabled. When a dual power plane CPU is installed, the single power plane selections will be automatically disabled. You may have one jumper on the Single Power Plane and another on the Dual Power Planes at the same time. WARNING: Incorrect setting can damage your CPU. If you are not exactly clear on CPU jumper settings, check with your retailer. 5. Single Power Plane CPU Voltage Regulator Selection (JP17) These jumpers set the voltage supplied to single power plane CPU's. CPU Manufacturer CPU Type Intel/AMD P54C/CS/K5 Intel/AMD/IBM/Cyrix P54C/CS/K5/6x86 Voltage STD (3.4 Volts) VRE (3.5 Volts) JP17 [1-2] (Default) [2-3]

JPP54C/CS/K5 (STD 3.4V) (Default)
JPP54C/CS/K5/6x86 (VRE 3.5 Volts)
Voltage Regulator Output Selection (STD / VRE)
6. Dual Power Plane CPU Voltage Regulator Selection (JP20) These jumpers set the voltage supplied to dual power plane CPU's. CPU Manufacturer AMD AMD Intel/IBM/Cyrix (Reserved) (Reserved) CPU Type K6-PR233 K6-PR166,200 P55C/6x86MX (Reserved) (Reserved)

[9-10] JP20

Voltage 3.2 Volts 2.9 Volts 2.8 Volts 2.7 Volts 2.5 Volts

[7-8] JP20

JP20 [9-10] [7-8] [5-6] (Default) [3-4] [1-2]

[5-6] JP20

K6-PR233 (3.2 Volts)

K6-PR166,200 (2.9 Volts)

P55C/6x86MX (2.8V) (Default)
CPU Vcore Voltage Selection
7. CPU External (BUS) Frequency Selection (JP8, JP9, JP10) These jumpers tell the clock generator what frequency to send to the CPU. These allow the selection of the CPUs External frequency (or BUS Clock). The BUS Clock times the BUS Ratio equals the CPU's Internal frequency (the advertised CPU speed). 8. CPU to BUS Frequency Ratio (JP11, JP12) These jumpers set the frequency ratio between the Internal frequency of the CPU and the External frequency (called the BUS Clock) within the CPU. These must be set together with the above jumpers CPU External (BUS) Frequency Selection.
50MHz 55MHz 60MHz 66MHz CPU External Clock (BUS) Frequency Selection

JP8 JP9 JP10 JP11 JP12

3 75MHz 3
3 2.5x(5/2) 2.5x(5/2) 1.0x(1/1)
3 3.0x(3/1) 3.0x(3/1) 4.0x(4/1)
III. INSTALLATION (Jumpers) 10
Complete Names: Intel Pentium P54C, P55C-MMX AMD K5, K6 IBM/Cyrix 6x86, 6x86MX
1.5x(3/2) 2.0x(2/1) P54C/K5 P55C/K6/MX 3.5X(7/2) 2.0x(2/1) IBM/Cyrix 6x86 3.0x(3/1) 2.0x(2/1) CPU : BUS Frequency Ratio
Set the jumpers by the Internal speed of the Intel, AMD, IBM, or Cyrix CPU as follows:
CPU Model Intel Pentium Intel Pentium Intel Pentium Intel Pentium Intel Pentium Intel Pentium Intel Pentium Intel Pentium Intel Pentium AMD-K6-PR233 AMD-K6-PR200 AMD-K6-PR166 AMD-K5-PR133/100 AMD-K5-PR120/90 AMD-K5-PR75 IBM/Cyrix 6x86MX-PR233 IBM/Cyrix 6x86MX-PR200 IBM/Cyrix 6x86MX-PR166 Freq. 233MHz 200MHz 166MHz 150MHz 133MHz 120MHz 100MHz 90MHz 75MHz 233MHz 200MHz 166MHz 100MHz 90MHz 75MHz 200MHz 166MHz 150MHz Ratio 3.5x 3.0x 2.5x 2.5x 2.0x 2.0x 1.5x 1.5x 1.5x 3.5x 3.0x 2.5x 1.5x 1.5x 1.5x 3.0x 2.5x 2.5x 2.0x B. Freq. 66MHz 66MHz 66MHz 60MHz 66MHz 60MHz 66MHz 60MHz 50MHz 66MHz 66MHz 66MHz 66MHz 60MHz 50MHz 66MHz 66MHz 60MHz 66MHz (BUS Freq.) JP10 JP9 JP8 [2-3] [1-2] [2-3] [2-3] [1-2] [2-3] [2-3] [1-2] [2-3] [1-2] [2-3] [2-3] [2-3] [1-2] [2-3] [1-2] [2-3] [2-3] [2-3] [1-2] [2-3] [1-2] [2-3] [2-3] [2-3] [2-3] [2-3] [2-3] [1-2] [2-3] [2-3] [1-2] [2-3] [2-3] [1-2] [2-3] [2-3] [1-2] [2-3] [1-2] [2-3] [2-3] [2-3] [2-3] [2-3] [2-3] [1-2] [2-3] [2-3] [1-2] [2-3] [1-2] [2-3] [2-3] [2-3] [1-2] [2-3] (Freq. Ratio) JP12 JP11 [1-2] [1-2] [2-3] [1-2] [2-3] [2-3] [2-3] [2-3] [1-2] [2-3] [1-2] [2-3] [1-2] [1-2] [1-2] [1-2] [1-2] [1-2] [1-2] [1-2] [2-3] [1-2] [2-3] [2-3] [1-2] [1-2] [1-2] [1-2] [1-2] [1-2] [2-3] [1-2] [2-3] [2-3] [2-3] [2-3] [1-2] [2-3]

*IBM/Cyrix6x86-PR166+ 133MHz
*NOTE: Only IBM or Cyrix Rev 2.7 or later is supported on this motherboard (see next page). Bootup screen will show 6x86-P166+ with the Cyrix PR166+ installed on this motherboard.
Compatible Cyrix CPU Identification
The only Cyrix CPU that is supported on this motherboard is labeled Cyrix 6x86-PR166+ but must be Revision 2.7 or later. Look on the underside of the CPU for the serial number. The number should read G8DC6620A or later.
9. Memory Cacheable Size (JP4) The default of 64MB uses only the onboard TAG SRAM which allows cacheable memory up to 64MB. If you install DRAM above 64MB and wish to allow cacheable memory above 64MB, you need to install a TAG SRAM upgrade or use a cache module with an extended TAG SRAM (such as 256KB ASUS CM1 Rev 3.0 with 2 TAG SRAM's) but not both and set this jumper to 512MB. See page 12 for TAG SRAM upgrade and page 14 for cache module information. WARNING: If there are DRAM cache chips (MCache) either onboard or on the SIMM cache module instead of pipelined burst SRAM chips, this jumper must be set to 64MB. 512MB will make the system unstable. Mcache chips can only allow cacheable memory up to 64MB. See "Map of Motherboard" on page 4 for L2 cache locations. If the cache module that you install already have an extended tag, do not install another TAG SRAM into the TAG SRAM Upgrade Socket. Cacheable Size 64MB (BSRAM/MCache) 512MB (BSRAM Only) JP4 [1-2] (Default) [2-3] III. INSTALLATION (Jumpers) 11
JP64MB Cacheable (Default) Burst SRAM or MCache Cacheable Size (64MB/512MB)
JP512MB Cacheable Burst SRAM Only
2. System Memory (DRAM & SRAM)
This motherboard supports four 72-pin SIMMs of 4MB, 8MB, 16MB, 32MB, or 64MB to form a memory size between 8MB to 256MB. The DRAM can be either 60ns or 70ns Fast Page Mode (Asymmetric or Symmetric) or EDO. To support ECC, you must use true (opposed to phantom parity generated by logic chips) 36-bit parity-type DRAM (e.g. 8 chips + 4 parity chips) in pairs for all modules. Mixing 32-bit non-parity DRAM (e.g. 8 chips) and 36-bit DRAM (e.g. 12 chips) will work minus the ECC feature. Install memory in any or all of the banks in any combination as follows:

42 Pins

III. INSTALLATION (External Cache)
SIMM Cache Module ASUS CM1 Rev 1.0 ASUS CM1 Rev 1.3 ASUS CM4 Rev 1.5 ASUS CM1 Rev 1.6 ASUS CM1 Rev 3.0 COAST 1.1 COAST 1.2 COAST 1.3 COAST 2.0 COAST 2.1 COAST 3.0 COAST 3.1

38 Pins

Pipelined Burst Cache Module
Insert the module as shown. Because the number of pins are different on either side of the break, the module will only fit in the orientation as shown.
Compatible Cache Modules for this Motherboard
256KB to 512KB No No No Yes Yes No No No Yes Yes Yes Yes 0KB to 256/512KB No No No No Yes No No No Yes Yes Yes Yes
WARNING: If the cache module that you install already have an extended tag, do not install another TAG SRAM into the TAG SRAM Upgrade Socket. 14 ASUS P/I-P55T2P4 User's Manual
3. Central Processing Unit (CPU)
The motherboard provides a 321-pin ZIF Socket 7 that is backwards compatible with ZIF Socket 5 processors. The CPU that came with the motherboard should have a fan attached to it to prevent overheating. If this is not the case then purchase a fan before you turn on your system. Apply thermal jelly to the CPU top and then install the fan onto the CPU. WARNING: Without a fan, the CPU can overheat and cause damage to both the CPU and the motherboard. (See page 24 "CPU Cooling Fan Connector.) To install a CPU, first turn off your system and remove its cover. Locate the ZIF socket and open it by first pulling the lever sideways away from the socket then upwards to a 90-degree right angle. Insert the CPU with the correct orientation as shown. Use the notched corner of the CPU with the white dot as your guide. The white dot should point towards the end the of the lever. Notice that there is a blank area where one hole is missing from that corner of the square array of pin holes and a "1" printed on the motherboard next to that corner. Because the CPU has a corner pin for three of the four corners, the CPU will only fit in the one orientation as shown. The picture is for reference only; you should have a CPU fan that will cover the face of the CPU. With the added weight of the CPU fan, no force is required to insert the CPU. Once completely inserted, hold down on the fan and close the socket's lever. IMPORTANT: You must set jumpers for "CPU to BUS Frequency Ratio" and jumpers for "BUS Frequency Selection" on page 10 depending on the CPU that you install.

Lever Lock

White Dot
ZIF Socket 7 with Pentium Processor

III. INSTALLATION (CPU)

4. Expansion Cards
WARNING: Make sure that you unplug your power supply when adding or removing expansion cards or other system components. Failure to do so may cause severe damage to both your motherboard and expansion cards. First read your expansion card documentation on any hardware and software settings that may be required to setup your specific card. NOTE: PCI Slot 4 has a MediaBus extension 2.0 (see page 18) which allows the installation of a PCI card or a MediaBus card (optional multifunctional card) but not both. III. INSTALLATION (Expansion Cards) 16

IV. BIOS (Flash Memory Writer) 28

6. BIOS Setup

The motherboard supports two programmable Flash ROM chips: 5 Volt and 12 Volt. Either of these memory chips can be updated when BIOS upgrades are released. Use the Flash Memory Writer utility to download the new BIOS file into the ROM chip as described in detail in this section. All computer motherboards provide a Setup utility program for specifying the system configuration and settings. If your motherboard came in a computer system, the proper configuration entries may have already been made. If so, invoke the Setup utility, as described later, and take note of the configuration settings for future reference; in particular, the hard disk specifications. If you are installing the motherboard, reconfiguring your system or you receive a Run Setup message, you will need to enter new setup information. This section describes how to configure your system using this utility. The BIOS ROM of the system stores the Setup utility. When you turn on the computer, the system provides you with the opportunity to run this program. This appears during the Power-On Self Test (POST). Press <Delete> to call up the Setup utility. If you are a little bit late pressing the mentioned key(s), POST will continue with its test routines, thus preventing you from calling up Setup. If you still need to call Setup, reset the system by pressing <Ctrl> + <Alt> + <Delete>, or by pressing the Reset button on the system case. You can also restart by turning the system off and then back on again. But do so only if the first two methods fail. When you invoke Setup, the CMOS SETUP UTILITY main program screen will appear with the following options:

IV. BIOS (BIOS Setup)

Load Defaults
The Load BIOS Defaults option loads the minimized settings for troubleshooting. Load Setup Defaults, on the other hand, is for loading optimized defaults for regular use. Choosing defaults at this level, will modify all applicable settings. A section at the bottom of the above screen displays the control keys for this screen. Take note of these keys and their respective uses. Another section just below the control keys section displays information on the currently highlighted item in the list.

Standard CMOS Setup

This Standard CMOS Setup option allows you to record some basic system hardware configuration and set the system clock and error handling. If the motherboard is already installed in a working system, you will not need to select this option anymore. However, if the configuration stored in the CMOS memory on the board gets lost or damaged, or if you change your system hardware configuration, you will need to respecify the configuration values. The configuration values usually get lost or corrupted when the power of the onboard CMOS battery weakens.
IV. BIOS (Standard CMOS) The above screen provides you with a list of options. At the bottom of this screen are the control keys for use on this screen. Take note of these keys and their respective uses. User-configurable fields appear in a different color. If you need information on the selected field, press the <F1> key. The help menu will then appear to provide you with the information you need. The memory display at the lower right-hand side of the screen is read-only and automatically adjusts accordingly. 30 ASUS P/I-P55T2P4 Users Manual
Details of Standard CMOS Setup:
Date To set the date, highlight the Date field and then press the page up/page down or +/- keys to set the current date. Follow the month, day and year format. Valid values for month, day and year are:
Month: Day: Year: 1 to to 31 up to 2099
Time To set the time, highlight the Time field and then press the page up/page down or +/- keys to set the current time. Follow the hour, minute and second format. Valid values for hour, minute and second are:
Hour: Minute: Second: 00 to to to 59
time, just press the <Enter> key twice if you do not want to modify the current You can bypass the date and time prompts by creating an AUTOEXEC.BAT file. For information on how to create this file, please refer to the MS-DOS manual.
Hard Disk Drives This field records the specifications for all non-SCSI hard disk drives installed in your system. The onboard PCI IDE connectors provide Primary and Secondary channels for connecting up to four IDE hard disks or other IDE devices. Each channel can support up to two hard disks; the first of which is the master and the second is the slave. Specifications for SCSI hard disks need not to be entered here since they operate using device drivers and are not supported by any the BIOS. If you install the optional PCI-SC200 SCSI controller card into the motherboard (see section VI for instructions). If you install other vendors SCSI controller card, please refer to their respective documentations on how to install the required SCSI drivers.

IV. BIOS (Standard CMOS)

For IDE hard disk drive setup, you can: Use the Auto setting for detection during bootup. Use the IDE HDD AUTO DETECTION in the main menu to automatically enter the drive specifications. Enter the specifications yourself manually by using the User option. The entries for specifying the hard disk type include CYLS (number of cylinders), HEAD (number of read/write heads), PRECOMP (write precompensation), LANDZ (landing zone), SECTOR (number of sectors) and MODE. The SIZE field automatically adjusts according to the configuration you specify. The documentation that comes with your hard disk should provide you with the information regarding the drive specifications. The MODE entry is for IDE hard disks only, and can be ignored for MFM and ESDI drives. This entry provides three options: Normal, Large, LBA, or Auto (see below). Set MODE to the Normal for IDE hard disk drives smaller than 528MB; set it to LBA for drives over 528MB that support Logical Block Addressing (LBA) to allow larger IDE hard disks; set it to Large for drives over 528MB that do not support LBA. Large type of drive can only be used with MS-DOS and is very uncommon. Most IDE drives over 528MB support the LBA mode.

PCI/VGA Palette Snoop Some display cards that are nonstandard VGA such as graphics accelerators or MPEG Video Cards may not show colors properly. The setting Enabled should correct this problem. Otherwise leave this on the setup default setting of Disabled. OS/2 Onboard Memory > 64M When using OS/2 operating systems with installed DRAM of greater than 64MB, you need to Enable this option otherwise leave this on the setup default of Disabled.... Video ROM BIOS Shadow This field allows you to change the video BIOS location from ROM to RAM. Relocating to RAM enhances system performance because information access is faster than to ROM. Setup default setting is Enabled. C8000 CBFFF Shadow to DC000 DFFFF Shadow These fields are used for shadowing other expansion card ROMs. If you install other expansion cards with ROMs on them, you will need to know which addresses the ROMs use to shadow them specifically. Shadowing a ROM reduces the memory available between 640KB and 1024KB by the amount used for this purpose. Leave on default setting of Disabled.... Boot Up NumLock Status This field enables users to activate the Number Lock function upon system boot. The setup default setting for this field is On. IV. BIOS (BIOS Features) 36 Boot Up System Speed This has no function and should be left at the setup default of High. Typematic Rate Setting When enabled, you can set the two typematic controls listed below. Setup default setting is Disabled. Typematic Rate (Chars/Sec) This field controls the speed at which the system registers repeated keystrokes. Options range from 6 to 30 characters per second. Setup default setting is 6; other settings are 8, 10, 12, 15, 20, 24, and 30. Typematic Delay (Msec) This field sets the time interval, in milliseconds, for displaying the first and second characters. Four delay rate options are available: 250 (default), 500, 750 and 1000.

Chipset Features Setup

This Chipset Features Setup option controls the configuration of the boards chipset. Control keys for this screen are the same as for the previous screen.
Auto Configuration The default setting of 60ns DRAM sets the optimal timings for items 2 through 9 for 60ns DRAM modules. If you are using 70ns DRAM modules, you must change this item to 70ns DRAM. See pages 12-13 for DRAM installation information. Peer Concurrency (Leave on default setting of Enabled) PCI Streaming (Leave on default setting of Enabled) Passive Release (Leave on default setting of Enabled) Chipset Global Features (Leave on default setting of Enabled) 16-bit I/O Recovery Time Timing for 16-bit ISA cards (Leave on default setting of 1 BUSCLK) 8-bit I/O Recovery Time Timing for 8-bit ISA cards (Leave on default setting of 1 BUSCLK) Video BIOS Cacheable Allows the Video BIOS to be cached to allow faster execution. (Leave on default setting of Enabled) Memory Hole At 15M-16M Enabling this features reserves 15MB to 16MB memory address space to ISA expansion cards that specifically require this setting. This makes the memory from 15MB and up unavailable to the system. Expansion cards can only access memory up to 16MB. The default is Disabled.

IV. BIOS (Chipset Features)

(BIOS Features)

[DRAM and ECC] If all your DRAM modules have parity chips (e.g. 8 chips + 4 parity chips), they are considered 36bits. This motherboard sums the memory per bank and therefore two modules will give 72bits and the following will be displayed:
If your DRAM modules do not have parity chips (e.g. 8 chips), they are considered 32bits and the following will be displayed instead:
The default of Disabled for Memory parity SERR# (NMI) will not show memory errors on your monitor. When using parity DRAM modules, you can select from the default of Parity or ECC (Error Checking and Correcting) to correct 1 bit memory errors that may occur in the memory. (See pages 12-13 for more information on DRAM memory modules.).... Onboard FDC Controller When enabled, this field allows you to connect your floppy disk drives to the onboard floppy drive connector instead of a separate controller card. If you want to use a different controller card to connect the floppy drives, set this field to Disabled. Default setting is Enabled. Onboard FDC Swap A: B: This field allows you to reverse the hardware drive letter assignments of your floppy disk drives. Two options are available: No Swap (default) and Swap AB. If you want to switch drive letter assignments through the onboard chipset, set this field to Swap AB. Onboard Serial Port 1 Settings are 3F8H/IRQ4 (default), 2F8H/IRQ3, 3E8H/IRQ4, 2E8H/IRQ10, and Disabled for the onboard serial connector. Onboard Serial Port 2 Settings are 3F8H/IRQ4, 2F8H/IRQ3 (default), 3E8H/IRQ4, 2E8H/IRQ10, and Disabled for the onboard serial connector.
(Chipset Features) IV. BIOS (Chipset Features) 38
Onboard Parallel Port This field sets the address of the onboard parallel port connector. You can select either: 3BCH / IRQ 7, 378H / IRQ 7 (default), 278H / IRQ 5, Disabled. If you install an I/O card with a parallel port, ensure that there is no conflict in the address assignments. The PC can support up to three parallel ports as long as there are no conflicts for each port. Parallel Port Mode This field allows you to set the operation mode of the parallel port. The setting Normal, allows normal-speed operation but in one direction only; EPP allows bidirectional parallel port operation at maximum speed; ECP allows the parallel port to operate in bidirectional mode and at a speed faster than the maximum data transfer rate; ECP+EPP (default) allows normal speed operation in a two-way mode. ECP DMA Select This selection is available only if you select ECP or ECP+EPP in the Parallel Port Mode. Select either DMA Channel 1, 3 (default), or Disabled. UART2 Use Infrared When enabled, this field activates the onboard infrared feature and sets the second serial UART to support the infrared module connector on the motherboard. If your system already has a second serial port connected to the onboard COM2 connector, it will no longer work if you enable the infrared feature. By default, this field is set to Disabled, which leaves the second serial port UART to support the COM2 serial port connector. See section III for IrDA-Compliant Infrared Module Connector. Onboard PCI IDE Enable You can select to enable the Primary IDE channel, Secondary IDE channel, Both (default), or Disable both channels (for systems with only SCSI drives). IDE 0 Master/Slave Mode, IDE 1 Master/Slave Mode Each channel (0 and 1) has both a master and a slave making four IDE devices possible. Because each IDE device may have a different Mode timing (0, 1, 2, 3, 4), it is necessary for these to be independent. The default setting of Auto will allow autodetection to ensure optimal performance.

Exit Without Saving

Select this option to exit the Setup utility without saving the modifications you specify during the current session. To exit without saving, highlight the Exit Without Saving option on the main screen and then press <Enter>.
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V. DESKTOP MANAGEMENT

Desktop Management Interface (DMI)
Introducing the ASUS DMI Configuration Utility
This motherboard supports DMI within the BIOS level and provides a DMI Configuration Utility to maintain the Management Information Format Database (MIFD). DMI is able to auto-detect and record information pertinent to a computers system such as the CPU type, CPU speed, and internal/external frequencies, and memory size. The onboard BIOS will detect as many system information as possible and store those collected information in a 4KB block in the motherboards Flash EPROM and allow the DMI to retrieve data from this database. Unlike other BIOS software, the BIOS on this motherboard uses the same technology implemented for Plug and Play to allow dynamic real-time updating of DMI information versus creating a new BIOS image file and requiring the user to update the whole BIOS. This DMI Configuration Utility also allows the system integrator or end user to add additional information into the MIFD such as serial numbers, housing configurations, and vendor information. Those information not detected by the motherboard BIOS and has to be manually entered through the DMI Configuration Utility and updated into the MIFD. This DMI Configuration Utility provides the same reliability as PnP updating and will prevent the refreshing failures associated with updating the entire BIOS.
The DMI Configuration Utility (DMICFG.EXE) must be ran in real mode in order for the program to run, the base memory must be at least 180K. Memory managers like HIMEM.SYS (required by windows) must not be installed. You can boot up from a system diskette without AUTOEXEC.BAT and CONFIG.SYS files, REM HIMEM.SYS in the CONFIG.SYS, or press <F5> during bootup to bypass your AUTOEXEC.BAT and CONFIG.SYS files.
V. DMI (DMI Introduction)

(Flash Memory Writer)

System Requirements
The motherboard BIOS must support DMI. The following motherboards do not support DMI: P/I-P6RP4 PCI/E-P54NP4 PCI/I-P54NP4D (not supported) (not supported) (not supported)
Using the ASUS DMI Configuration Utility

Edit DMI (or delete)

Use the (left-right) cursors to move the top menu items and the (up-down) cursor to move between the left hand menu items. The bottom of the screen will show the available keys for each screen. Press enter at the menu item to enter the right hand screen for editing. Edit component appears on top. The reversed color field is the current cursor position and the blue text are available for editing. The orange text shows auto-detected information and are not available for editing. The blue text Press [ENTER] for detail contains a second pop-up menu is available, use the + - (plus-minus) keys to change the settings. Enter to exit and save, ESC to exit and not save. If the user has made changes, ESC will prompt you to answer Y or N. Enter Y to go back to the left-hand screen and save, enter N to go back to left-hand screen and not save. If editing has not been made, ESC will send you back to the left hand menu without any messages.

V. DMI (Using DMI Utility) 50

Notes:

A heading, *** BIOS Auto Detect *** appears on the right for each menu item on the left side that has been auto detected by the system BIOS. A heading, *** User Modified *** will appear on the right for menu items that has been modified by the user.

Save MIFD

You can save the MIFD (normally only saved to flash ROM) to a file by entering the drive and path here. If you want to cancel save, you may press ESC and a message Bad File Name appears here to show it was not saved. Load MIFD
You can load the disk file to memory by entering a drive and path and file name here. Load BIOS Defaults V. DMI (Using DMI Utility) You can load the BIOS defaults from a MIFD file and can clear all user modified and added data. You must reboot your computer in order for the defaults to be saved back into the Flash BIOS. ASUS P/I-P55T2P4 Users Manual 51

VI. ASUS PCI SCSI Cards

Aside from the system BIOS, the Flash memory chip on the motherboard also contains the Symbios SCSI BIOS. This Symbios SCSI BIOS works in conjunction with the optional ASUS PCI-SC200 controller card to provide Fast SCSI-2 interface when using compatible SCSI devices or the ASUS PCI-SC860 SCSI controller cards to provide Ultra-Fast SCSI-2 interface when using Ultra-Fast SCSI-2 devices. All SCSI devices you install on your system require driver software to function. The Symbios SCSI BIOS directly supports SCSI hard disks under the DOS, Windows and OS/2 environments. It also uses device drivers from the DOS floppy disk included in the ASUS PCI-SC200 and ASUS PCI-SC860 controller card packages to support hard disks and other SCSI devices working under DOS, Microsoft Windows, Microsoft Windows NT, Novell NetWare and IBM OS/2. These drivers provide higher performance than the direct BIOS support. To use these drivers, you must install them into your system and add them to your system configuration files. Driver support for SCSI devices used with SCO UNIX is also provided. These drivers are included in the second SCO UNIX floppy disk. Windows 95 support is also available using the device drivers included within the Windows software. The ASUS PCI-SC200 and ASUS PCI-SC860 are Plug and Play adapters that are auto detected by BIOS and current operating systems that support Plug and Play features. For information about these drivers and their usage, please view the Readme files included in the driver packages. VI. ASUS SCSI Cards (SCSI BIOS) 53

CAUTION: Keep the ASUS I-A16C stored in its anti-static bag until you are ready to install it in your system. The ASUS I-A16C is easily damaged by static electricity. Observe the following precautions while unpacking and handling the board: Before handling the board, discharge static electricity form your body by touching an unpainted area of the system's metal chassis. While installing the board, ground yourself frequently to discharge any static electricity that may accumulate in your body. After removing the board form the anti-static bag, place it on a grounded surface with the components facing up. Check the board for damage. If any socketed component appears loose, press firmly but carefully to seat the chip in its socket. Otherwise, avoid touching the components on the board. Always handle the board by the edges.

Layout and Connectors

Mitsumi Audio In Sony Audio In Panasonic Audio In PC Speaker In Volume Control Wave Table Upgrade PC Speaker Out
Speaker Out Line Out Line In Microphone
VII. ASUS I-A16C (Layout / Connectors)

MIDI/Game

The audio input connectors are used when you wish to control software mixer settings (bass, treble, volume, etc.) for audio CD's that are played with your CD-ROM. If the "Audio Out" from the CD-ROM is not connected to the "Audio In" on the card, you can only use the direct output located in the front panel of the CD-ROM and adjust volume level by the knob.
CD-Audio Connector Pin Definitions
Sony Audio In Pin Definition l Right Signal 2 Ground 3 Ground 4 Left Signal PC Speaker In Pin Definition 1 Mono Signal 2 Ground -- ----- ----- ---Mitsumi Audio In Pin Definition 1 Ground 2 Left Signal 3 Ground 4 Right Signal PC Speaker Out Pin Definition 1 Right Signal 2 Ground 3 Left Signal 4 Ground -- ---Panasonic Audio In Pin Definition 1 Left Signal 2 Ground 3 Right Signal -- ---Volume Control Pin Definition 1 Ground 2 Volume Up 3 Ground 4 Volume Down 5 Ground

Installation Steps

Before using your computer, you must follow the six steps as follows: 1. 2. 3. 4. 5. 6. Set Jumpers on the Motherboard Install DRAM Modules Install the CPU Install Expansion Cards Connect Cables, Wires, and Power Supply Setup the BIOS Software

1. Jumpers

Several hardware settings are made through the use of jumper caps to connect jumper pins (JP) on the motherboard. See "Map of the Motherboard" on page 4 for locations of jumpers. The jumper settings will be described numerically such as [----], [1-2], [2-3] for no connection, connect pins 1&2, and connect pins 2&3 respectively. Pin 1 for our motherboards is always on or on the left when holding the motherboard with the keytop board connector away from yourself. A "1" is written besides pin 1 on jumpers with three pins. The jumpers will also be shown graphically such as to connect pins 1&2 and to connect pins 2&3. Jumpers with two pins will be shown as for short and for open. For manufacturing simplicity, the jumpers may be sharing pins from other groups. Use the diagrams in this manual instead of following the pin layout on the board. Settings with two jumper numbers require that both jumpers be moved together. To connect the pins, simply place a plastic jumper cap over the two pins as diagramed.
III. INSTALLATION (Jumpers)
WARNING: Some pins are used for connectors or power sources. These are clearly separated from jumpers in "Map of the Motherboard" on page 4. Placing jumper caps over these will cause damage to your motherboard. WARNING: Computer motheboards and components contain very delicate Integrated Circuit (IC) chips. To protect the motherboard and other components against damage from static electricity, you should follow some precautions whenever you work on your computer. 1. Unplug your computer when working on the inside. 2. Hold components by the edges and try not to touch the IC chips. 3. Use a grounded wrist strap before handling computer components. 4. Place components on a grounded antistatic pad or on the bag that came with the component whenever you work on lay down components.

Jumper Settings

1. On-Board Multi-I/O Selection (JP1) (For SMC SMC37C669 Only) For SMC Multi-I/O SMC37C669, you can selectively disable each onboard Multi-I/O item (floppy, serial, parallel, and IrDA) through BIOS (see page 35) or disable all Multi-I/O items at once with the following jumper in order to use your own Multi-I/O card. If your motherboard does not use the above SMC Multi-I/O, the following jumper will not be available and you can only disabled each item through BIOS. Selections Enable Disable JP1 [1-2] (Default) [2-3]
JP Enable (Default) JP Disabled

III. INSTALLATION (Jumpers) Programming Disabled Enabled
Multi I/O Setting (Enable / Disable) (For SMC 37C669 Only)
2. Flash ROM Boot Block Programming (JP8) This sets the operation mode of the boot block area of the BIOS Flash ROM to allow programming in the Enabled position. JP8 [1-2] (Default) [2-3]
JPDisabled (Default) JPEnabled
Boot Block Programming (Disable / Enable)
3. Total Level 2 Cache Size Setting (JP2) This jumper sets the total amount of L2 cache that is present. If you have two cache chips on-board (see "Map of Motherboard" for locations), then you have either 256KB or 512KB. An "ASUS" or "COAST" cache module can be used to upgrade the 256KB version to 512KB. If there is no on-board cache, you must install a cache module of either 256KB or 512KB. IMPORTANT: See page 14 "SRAM Cache" for installation procedures. Regardless of your cache combination, set the following jumpers according to the total amount of L2 cache that is present on-board and installed as a module. Selections 256KB 512KB JP2 [1-2] [2-3]

JP 256KB JP 512KB

Total L2 Cache Size Setting (256KB / 512KB)
4. Voltage Regulator Output Selection (JP17) These jumpers set the voltage supplied to the CPU. Selections STD 3.3V-3.465V VRE 3.4V-3.6V JP17 [2-3] (Default) [1-2]
JPSTD 3.3V - 3.465V (Default)

JPVRE 3.4V - 3.6V

Voltage Regulator Output Selection (STD / VRE)
5. CPU External (BUS) Frequency Selection (JP11, JP12) These jumpers tells the clock generator what frequency to send to the CPU. These allow the selection of the CPUs External frequency (or BUS Clock). The BUS Clock times the BUS Ratio equals the CPU's Internal frequency (the advertised CPU speed). 6. CPU to BUS Frequency Ratio (JP9, JP10) These jumpers set the frequency ratio between the Internal frequency of the CPU and the External frequency (called the BUS Clock) within the CPU. These must be set together with the above jumpers CPU External (BUS) Frequency Selection (JP11, JP12).
JP JP JP JP JP JP JP JP 12 11
66MHz 60MHz 50MHz 55MHz CPU External Clock (BUS) Frequency Selection JP JP JP JP JP JP 1.5 x 2.0 x 2.5 x 3.0 x CPU : BUS Frequency Ratio (1.5x, 2.0x, 2.5x, 3.0x) JP JP 10 9
Internal 166MHz 150MHz 133MHz 120MHz 100MHz 90MHz 75MHz 2.0x 2.0x 1.5x 1.5x 1.5x 66MHz 60MHz 66MHz 60MHz 50MHz
Set the jumpers by the Internal speed of the Intel CPU as follows: Ratio External JP12 2.5x 66MHz [2-3] 2.5x 60MHz [1-2] [2-3] [1-2] [2-3] [1-2] [2-3] JP11 [1-2] [2-3] [1-2] [2-3] [1-2] [2-3] [2-3] JP10 [2-3] [2-3] [1-2] [1-2] [1-2] [1-2] [1-2] JP9 [2-3] [2-3] [2-3] [2-3] [1-2] [1-2] [1-2]
7. PS/2 Mouse on IRQ12 Setting (JP18) JP7 enables or disables the on-board PS/2 mouse lead connector. When Enabled, the port becomes active and uses IRQ12. See Page 19 for the "PS/2 Mouse connector." Selections Disable Enable JP18 [2-3] (Default) [1-2]

III. INSTALLATION (Memory)
IMPORTANT: Do not use memory modules with more than 24 chips per module. Modules with more than 24 chips exceed the design specifications of the memory subsystem and will cause unreliable operation. IMPORTANT: Do not use SIMM Modules that use an extra TTL chip to convert the memory module from asymmetric to symmetric.
DRAM Memory Installation Procedures:
1. The SIMM memory modules will only fit in one orientation as shown because of a "Plastic Safety Tab" on one end of the SIMM slots which requires the "Notched End" of the SIMM memory modules.
Notched End 72 Pin SIMM DRAM Slots & Module
2. Press the memory module firmly into place starting from a 45 degree angle making sure that all the contacts are aligned with the slot. 3. With your finger tips, rock the memory module into a vertical position so that it clicks into place.

Support Clip

72 Pin DRAM in SIMM Socket
Safety Tab (This Side Only)

Mounting Hole

4. The plastic guides should go through the two "Mounting Holes" on the sides and the "Metal Clips" should snap on the other side. 5. To release the memory module, squeeze both "Metal Clips" outwards and rock the module out of the "Metal Clips".
III. INSTALLATION (DRAMMemory)
Level 2 External Static RAM (SRAM) Cache
The motherboard you may purchase may have either 0KB, 256KB, or 512KB on-board. If you have two cache chips on-board (see "Map of Motherboard" for locations), then you have either 256KB or 512KB pipelined bust SRAM cache. An "ASUS" or "COAST" cache module can be used to upgrade the 256KB version to 512KB. The 512KB version cannot be upgraded any further. If there is no on-board cache, you may install a SIMM cache module of either 256KB or 512KB. IMPORTANT: You must set jumper 2 "Total Level 2 Cache Size Setting" on page 9 when changes are made to your cache size.
III. INSTALLATION (SRAMCache)
SIMM Cache Module ASUS CM1 Rev 1.0 ASUS CM1 Rev 1.3 ASUS CM4 Rev 1.5 ASUS CM1 Rev 1.6 COAST 1.1 COAST 1.2 COAST 1.3 COAST 2.0 COAST 2.1 256KB No No No Yes No No No Yes Yes

1: GND 2: DATA 3: NC 4: VCC 5: CLK 8: NC
PS/2 Mouse Module Connector
3. Parallel Printer Connector (26 Pin Block) Connection for the included parallel port ribbon cable with mounting bracket. Connect the ribbon cable to this connection and mount the bracket to the case on an open slot. It will then be available for a parallel printer cable. Note: Serial printers must be connected to the serial port. You can enable the parallel port and choose the IRQ through BIOS Setup on page 37 "Onboard Parallel Port."

Parallel Connector

III. INSTALLATION (Connectors)
4. Serial port COM1 and COM2 connectors (Two 10-pin blocks) These connectors support the provided serial port ribbon cables with mounting bracket. Connect the ribbon cables to these connectors and mount the bracket to the case on an open slot. The two serial ports on the mounting bracket will then be used for pointing devices or other serial devices. See page 36 for BIOS configuration of "Onboard Serial Port"

COM 1 Pin 1 COM 2 Pin 1

5. Floppy drive connector (34-pin block ) This connector supports the provided floppy drive ribbon cable. After connecting the single end to the board, connect the two plugs on the other end to the floppy drives.

Floppy Drive Connector

Using a slight angle, align the plastic guide pins on the lead to their receptacles on the connector. Once aligned, press the lead onto the connector until the lead locks into place.
RED RED RED WHT BLK BLK BLK BLK BLU YLW RED ORG
GND -12V +12V PG Power Connector on Motherboard +5V
Power Plugs from Power Supply
6. Power connector (12-pin block) This connector connects to a standard 5 Volt power supply. To connect the leads from the power supply, ensure first that the power supply is not plugged. Most power supplies provide two plugs (P8 and P9), each containing six wires, two of which are black. Orient the connectors so that the black wires are located in the middle.
7. Primary IDE connector (40-pin Block) This connector supports the provided IDE hard disk ribbon cable. After connecting the single end to the board, connect the two plugs at the other end to your hard disk(s). If you install two hard disks, you must configure the second drive to Slave mode by setting its jumpers accordingly. Please refer to the documentation of your hard disk for the jumper settings. See the figure below.

Primary IDE Connector

8. Secondary IDE connector (40-pin block) This connector connects to the next set of Master and Slave hard disks. Follow the same procedure described for the primary IDE connector. You may also configure two hard disks to be both Masters using one ribbon cable on the primary IDE connector and another ribbon cable on the secondary IDE connector.

Secondary IDE Connector

9. Turbo LED switch (CON1) The motherboard's turbo function is always on. The turbo LED connection is labeled here but the LED will remain constantly lit while the system power is on. You may wish to connect the Power LED from the system case to this lead. See the figure below. 10. SMI suspend switch lead (CON1) This allows the user to manually place the system into a suspend mode or "Green" mode where system activity will be instantly decreased to save electricity and expand the life of certain components when the system is not in use. This 2-pin connector (see the figure below) connects to the case-mounted suspend switch. If you do not have a switch for the connector, you may use the "Turbo Switch" since it does not have a function. SMI is activated when it detects a short to open moment and therefore leaving it shorted will not cause any problems. May require one or two pushes depending on the position of the switch. Wake-up can be controlled by settings in the BIOS but the keyboard will always allow wake-up (the SMI lead cannot wake-up the system). If you want to use this connector, "Suspend Switch" in the POWER MANAGEMENT SETUP of the BIOS software should be on the default setting of Enable (see page 39). 11. Reset switch lead (CON1) This 2-pin connector connects to the case-mounted reset switch for rebooting your computer without having to turn off your power switch This is a preferred method of rebooting in order to prolong the life of the system's power supply. See the figure below. 12. Keyboard lock switch lead (CON1) This 5-pin connector connects to the case-mounted key switch for locking the keyboard for security purposes. See the figure below. 13. Speaker connector (CON1) This 4-pin connector connects to the case-mounted speaker.
Turbo or Power LED SMI Lead
+5V NC GND LOCK GND +5V GND GND SPKR

The entries for specifying the hard disk type include CYLS (number of cylinders), HEAD (number of read/write heads), PRECOMP (write precompensation), LANDZ (landing zone), SECTOR (number of sectors) and MODE. The SIZE field automatically adjusts according to the configuration you specify. The documentation that comes with your hard disk should provide you with the information regarding the drive specifications. The MODE entry is for IDE hard disks only, and can be ignored for MFM and ESDI drives. This entry provides three options: Normal, Large, LBA, or Auto (see page 29). Set MODE to the Normal for IDE hard disk drives smaller than 528MB; set it to LBA for drives over 528MB that support Logical Block Addressing (LBA) to allow larger IDE hard disks; set it to Large for drives over 528MB that do not support LBA. Large type of drive can only be used with MS-DOS and is very uncommon. Most IDE drives over 528MB support the LBA mode.
Auto detection of hard disks on boot-up (New Feature) For each field: Primary Master, Primary Slave, Secondary Master, and Secondary Slave, you can select Auto under the TYPE and MODE fields. This will enable auto detection of your IDE drives during boot-up. This will allow you to change your hard drives (with the power off) and then power on without having to reconfigure your hard drive type. If you use older hard drives which do not support this feature, then you must configure the hard drive in the standard method as described on page 30.
Drive A, Drive B These fields record the types of floppy disk drives installed in your system. The available options for drives A and B are:
360KB, 5.25 in. 1.2MB, 5.25 in. 720KB, 3.5 in. 1.44MB, 3.5 in. 2.88MB, 3.5 in. None
To enter the configuration value for a particular drive, highlight its corresponding field and then select the drive type using the left- or right-arrow key. Floppy 3 Mode Support This is the Japanese standard floppy drive. The standard stores 1.2MB in a 3.5" diskette. This is normally disabled but you may choose from either:
Drive A Drive B Both Disabled (Default)
Video Set this field to the type of video display card installed in your system. The options are:
EGA/VGA (Default) Mono (for Hercules or MDA) CGA 40 CGA 80
If you are using a VGA or any higher resolution card, choose the EGA/ VGA option. Halt On This field determines which types of errors will cause the system to halt.
All Errors (Default) No Errors All, But Keyboard All, But Diskette All, But Disk/Key

BIOS Features Setup

This BIOS Features Setup option consists of configuration entries that allow you to improve your system performance, or let you set up some system features according to your preference. Some entries here are required by the motherboards design to remain in their default settings.
Details of BIOS Features Setup:
Virus Warning This field protects the boot sector and partition table of your hard disk against accidental modifications. Any attempt to write to them will cause the system to halt and display a warning message. If this occurs, you can either allow the operation to continue or use a bootable virus-free floppy disk to reboot and investigate your system. The default setting is Disabled. This setting is recommended because conflicts with new operating systems. Installation of new operating systems require that you disable this to prevent write errors.

Chipset Features Setup

This Chipset Features Setup option controls the configuration of the boards chipset. Control keys for this screen are the same as for the previous screen.
Auto Configuration The default setting of 60ns DRAM sets the optimal timings for items 2 through 10 for 60ns DRAM modules. If you are using 70ns DRAM modules, you must change this item to 70ns DRAM. See pages 12-13 for DRAM installation information. IV. BIOS (Chipset Features) Peer Concurrency (leave on default setting) 16-bit I/O Recovery Time Timing for 16-bit ISA cards (leave on default setting) 8-bit I/O Recovery Time Timing for 8-bit ISA cards (leave on default setting) Video BIOS Cacheable Allows the Video BIOS to be cached to allow faster execution. (leave on default setting) Memory Hole at 15M - 16M Enabling this features reserves 15MB to 16MB memory address space to ISA expansion cards that specifically require this setting. This makes the memory from 15MB and up unavailable to the system. Expansion cards can only access memory up to 16MB. The default is Disabled.

(BIOS Features)

DRAM and ECC If all your DRAM modules have parity chips (e.g. 8 chips + 4 parity chips), they are considered 36bits. This motherboard sums the memory per bank and therefore two modules will give 72bits and the following will be displayed: DRAM are 72 bits wide Memory parity SERR# (NMI): DRAM ECC/PARITY Select: If your DRAM modules do not have parity chips (e.g. 8 chips), they are considered 32bits and the following will be displayed instead: DRAM are 64 (not 72) bits wide Memory parity SERR# (NMI): The default of Disabled for Memory parity SERR# (NMI) will not show memory errors on your monitor. When using parity DRAM modules, you can select from the default of Parity or ECC (Error Checking and Correcting) to correct 1 bit memory errors that may occur in the memory. (See pages 12-13 for more information on DRAM memory modules.) Onboard FDC Controller When enabled, this field allows you to connect your floppy disk drives to the on-board floppy drive connector instead of a separate controller card. If you want to use a different controller card to connect the floppy drives, set this field to Disabled. Default setting is Enabled. Onboard FDC Swap A: B: This field reverses the drive letter assignments of your floppy disk drives. Two options are available: No Swap and Swap AB. No Swap is the default setting. If you want to switch drive letter assignments, set this field to Swap AB, and the swap will be controlled in hardware. This works separately from the BIOS Features floppy disk swap feature. It is functionally the same as physically interchanging the connectors of the floppy disk drives. Onboard Serial Port 1 / Onboard Serial Port 2 These fields control the assignments for the motherboards two on-board serial connectors. The following lists the available options:

COM1, 3F8H (Onboard Serial Port 1 default) COM2, 2F8H (Onboard Serial Port 2 default) COM3, 3E8H COM4, 2E8H Disabled (Disables the on-board serial ports)
IV. BIOS (Chipset Features)

(Chipset Features)

Onboard Parallel Port This field sets the address of the on-board parallel port connector. You can select either: 3BCH / IRQ 7, 378H / IRQ 7 (default), 278H / IRQ 5, Disabled. If you install an I/O card with a parallel port, ensure that there is no conflict in the address assignments. The PC can support up to three parallel ports as long as there are no conflicts for each port. Parallel Port Mode This field allows you to set the operation mode of the parallel port. The default setting Normal, allows normal-speed operation but in one direction only; EPP allows bidirectional parallel port operation at maximum speed; ECP allows the parallel port to operate in bidirectional mode and at a speed faster than the maximum data transfer rate; ECP+EPP allows normal speed operation in a two-way mode. IV. BIOS (Chipset Features) ECP DMA Select This selection is available only if you select ECP or ECP+EPP in the Parallel Port Mode. Select either DMA Channel 1, 3, or Disable. The setup default is DMA Channel 3. UART2 Use Infrared When enabled, this field activates the on-board infrared feature and sets the second serial UART to support the infrared module connector on the motherboard. If your system already has a second serial port connected to the on-board COM2 connector, it will no longer work if you enable the infrared feature. By default, this field is set to Disabled, which leaves the second serial port UART to support the COM2 serial port connector. See page 25 for the Infrared Connector. IMPORTANT: For SMC37C665IR chipset, you must also physically set jumpers as well as change the the chipset setting. Onboard PCI IDE Enable You can select to enable the primary IDE channel, secondary IDE channel, both (default), or disable both channels (for systems with only SCSI hard drives). IDE 0 Master/Slave Mode, IDE 1 Master/Slave Mode Each channel (0 and 1) has both a master and a slave making four IDE devices possible. Because each IDE device may have a different Mode timing (0, 1, 2, 3, 4), it is necessary for these to be independent. The default setting of Auto will allow auto-detection to ensure the optimal performance.

Power Management Setup

This Power Management Setup option allows you to reduce power consumption. This feature turns off the video display and shuts down the hard disk after a period of inactivity.
IMPORTANT: Advanced Power Management (APM) should be installed to keep the system time updated when the computer enters suspend mode activated by the BIOS Power Management. For DOS environments, you need to add DEVICE=C:\DOS\POWER.EXE in you CONFIG.SYS. For Windows 3.1x and Windows 95, you need to install Windows including the APM feature. A battery and power cord icon labeled "Power" will appear in the "Control Panel." Choose "Advanced" in the Power Management Field. Video Off Option This field determines when to activate the video off feature. The settings are "Susp, Stby-> Off", "suspend -> off", "always on", and "all modes -> off." The default setting is Susp, Stby-> Off.

The first four fields on the screen set how IRQ use is determined for each PCI slot. The default setting for each field is Auto, which uses autorouting to determine IRQ use. The other options are manual settings of 14 or 15 for each slot.
IV. BIOS (Plug & Play / PCI)

(PowerManagement)

PNP and PCI Setup
This PNP and PCI Setup option configures the PCI bus slots. All PCI bus slots on the system use INTA#, thus all installed PCI cards must be set to this value.
The next field is the PCI Latency Timer. Do not change the default setting of 32 PCI Clock since this enables maximum PCI performance for this motherboard. The following describes the other user-configurable fields on this screen: IRQ xx Used By ISA These fields indicate whether or not the displayed IRQ for each field is being used by a Legacy (non-PnP) ISA card. Two options are available: No/ICU and Yes. The first option, the default value, indicates either that the displayed IRQ is not used or an ISA Configuration Utility (ICU) is being used to determine if an ISA card is using that IRQ. If you install a Legacy ISA card that requires a unique IRQ, and you are not using an ICU, you must set the field for that IRQ to Yes. For example: If you install a Legacy ISA card that requires IRQ 10 lets say, then set IRQ10 Used By ISA to Yes. DMA x Used By ISA These fields indicate whether or not the displayed DMA channel for each field is being used by a Legacy (non-PnP) ISA card. Available options include: No/ICU and Yes. The first option, the default setting, indicates either that the displayed DMA channel is not used or an ICU is being used to determine if an ISA card is using that channel. If you install a Legacy ISA card that requires a unique DMA channel, and you are not using an ICU, you must set the field for that channel to Yes. ISA MEM Block BASE This field allows you to set the base address and block size of a Legacy ISA card that uses any memory segment within the C800H and DFFFH address range. If you have such a card, and you are not using an ICU to specify its address range, select a base address from the six available options; the ISA MEM Block SIZE field will then appear for selecting the block size. If you have more than one Legacy ISA card in your system that requires to use this address range, you can increase the block size to either 8K, 16K, 36K, or 64K. If you are using an ICU to accomplish this task, leave ISA MEM Block BASE to its default setting of No/ICU.

Load BIOS Defaults

This Load BIOS Defaults option allows you to load the troubleshooting default values permanently stored in the BIOS ROM. These default settings are non-optimal and disable all high performance features. To load these default settings, highlight Load BIOS Defaults on the main screen and then press the <Enter> key. The system displays a confirmation message on the screen. Press the <Y> key and then the <Enter> key to confirm. Press the <N> key and then the <Enter> key to abort. This feature does not affect the fields on the Standard CMOS Setup screen.

Load Setup Defaults

This Load Setup Defaults option allows you to load the default values to the system configuration fields. These default values are the optimized configuration settings for the system. To load these default values, highlight Load Setup Defaults on the main screen and then press the <Enter> key. The system displays a confirmation message on the screen. Press the <Y> key and then the <Enter> key to confirm. Press the <N> key and then the <Enter> key to abort. This feature does not affect the fields on the Standard CMOS Setup screen. IV. BIOS (Load Defaults) P/I-P55T2P4 User's Manual
Supervisor Password and User Password
These two options set the system passwords. Supervisor Password sets a password that will be used to protect the system and the Setup utility; User Password sets a password that will be used exclusively on the system. By default, the system comes without any passwords. To specify a password, highlight the type you want and then press the <Enter> key. A password prompt appears on the screen. Taking note that the password is case sensitive, and can be up to 8 alphanumeric characters long, type in your password and then press the <Enter> key. The system confirms your password by asking you to type it again. After setting a password, the screen automatically reverts to the main screen.

IV. BIOS (Passwords)

To implement the password protection, specify in the Security Option field of the BIOS Features Setup screen when the system will prompt for the password. If you want to disable either password, press the <Enter> key instead of entering a new password when the Enter Password prompt appears. A message confirms the password has been disabled.
NOTE: If you forget the password, see page 11 for procedures on clearing the CMOS.

IDE HDD Auto Detection

Advanced Features

Flash Type -- SST 29EE010 Current BIOS Revision: #401A0-0101 Choose one of the following: 1. Clear PNP ESCD Parameter Block
IV. BIOS (Flash Memory Writer) (Flash Memory Writer)
2. Update BIOS Including Boot Block and ESCD

Enter Choice: [2]

Details of Advanced Features:
Clear PNP ESCD Parameter Block This option erases the Plug-and-Play (PnP) configuration record. Update BIOS Including Boot Block and ESCD This option updates the Boot Block, the system BIOS and the PnP ESCD Parameter Block from a new BIOS file in the \FLASH directory. To select an option, type its corresponding number in the provided space and then press the <Enter> key. Follow these procedure to update the PnP system BIOS.
1. For security reasons, back up your existing system BIOS using the Save Current BIOS to File option. If anything goes wrong with the updating process, you can still recover the original BIOS. To back up, select the first command option from the Flash Memory Writer screen. Specify a file name such as T25I0102.AWD when prompted and then press the <Enter> key. The program then creates a file in the \FLASH directory containing the current BIOS. 2. Download the new BIOS by selecting the second command option from the Advanced Features screen. The program displays a second screen prompting you for the name of the BIOS file. Type in the complete name of the file, including the file name extension, and then press the <Enter> key. The utility then downloads the new BIOS file. The following message appears: DO NOT TURN OFF THE SYSTEM IF THERE IS A PROBLEM! If you encounter problems while downloading the new BIOS, DO NOT turn off your system since this might prevent your system from booting up. Just repeat the process, and if the problem still persists, download the original BIOS file you created in step 1 above. 3. After successfully downloading the new BIOS file, exit the Flash Memory Writer utility and then turn off your system. Set JP5 back to its default settings of Programming Disabled. 4. Turn on the system and hold down <DEL> to enter BIOS Setup. You must load "Setup Default" as described on page 42 to affect the new BIOS. WARNING: If the Flash Memory Writer utility was not able to successfully download a complete BIOS file, your system may not be able to boot up. If this happens, your system will require service from your vendor. IV. BIOS IV. BIOS (Flash Memory Writer) (Flash Memory Writer)

V. PCI-SC200 SCSI Card

NCR SCSI BIOS and Drivers
Aside from the system BIOS, the Flash memory chip on the motherboard also contains the NCR SCSI BIOS. This SCSI BIOS works in conjunction with the optional PCI-SC200 SCSI controller card to provide a complete PCI Fast SCSI-2 interface. All SCSI devices you install to your system require driver software to function. The NCR SCSI BIOS directly supports SCSI hard disks under the DOS, Windows and OS/2 environments. It also uses device drivers from the DOS floppy disk included in the PCI-SC200 controller card package to support hard disks and other SCSI devices working under DOS, Windows, Windows NT, Novell NetWare and OS/2. These drivers provide higher performance than the direct BIOS support. To use these drivers, you must install them into your system and add them to your system configuration files. Driver support for SCSI devices used with SCO UNIX is also provided. These drivers are included in the second SCO UNIX floppy disk. Windows 95 support is also available using the device drivers included within the Windows software. The PCI-SC200 adapter is auto detected as PCI NCRC810 SCSI HOST ADAPTER and uses the NCRC810.MPD driver. For information about these drivers and their usage, see the Readme files included in the driver packages. You can print out the contents of these files using any text editor program. The next few pages will instruct you on the installation of the PCI-SC200 Fast SCSI Card. V. PCI-SC200 (NCRSCSIBIOS) P/I-P55T2P4 User's Manual
The PCI-SC200 SCSI Interface Card
Your motherboard may have come with an optional SCSI (Small Computer System Interface) controller card, the PCI-SC200. The card is also available separately. This card works with the SCSI BIOS on the motherboard. Together, they provide a complete PCI Fast SCSI-2 interface. With the card installed in your system you can connect SCSI devices installed in your system case to the internal connector on the card. You also have the additional option of connecting external SCSI devices to the external SCSI-2 connector on the card. If you get the PCI-SC200 later on as an option, you will need to install it yourself. The setup procedure is explained here.

Setting Up the PCI-SC200

There are two jumper settings you may need to make on the card to set it up. One setting assigns the PCI INT interrupt, the other sets the cards termination.

V. PCI-SC200 (Setup)

Setting the INT Assignment
You must use PCI INT A setting in order to properly assign the card's interrupt. On the PCI-SC200, you assign the INT by setting jumper JP1 or JP2. The default setting for the card already is INT A, so you do not need to change the setting to use the PCI-SC200 with this motherboard.

JPJP 3

JPJP 3 INT C

JPJP 3 INT D

INT A (Def) INT B
Interrupt Settings (A, B, C, or D)

Terminator Settings

SCSI devices are connected together in a chain by cables. Internal devices connect to the PCI-SC200 with a fifty-pin flat ribbon cable. External devices connect to the external port with a SCSI-2 cable. If there are more than one internal or external devices, additional devices are connected with cables to form a daisy chain. The SCSI chain must be terminated at both ends, or the devices in the chain will not work properly. Many SCSI devices use a set of terminating resistors to terminate the device. The PCI-SC200 has active termination that you set using jumper JP5. If you need to terminate the PCI-SC200, you do it by setting the jumper. The are two settings, "terminated" and "not terminated," as shown below. V. PCI-SC200 (Jumpers)
JP 5 JP 5 Terminated (Default) Not Terminated Terminator Setting (Terminated / Not Terminated)
Decide whether or not you need to terminate the PCI-SC200 based on its position in the SCSI chain. Only the devices at each end of the chain need to be terminated. If you have only internal or only external devices connected to the PCI-SC200, then you must terminate the PCI-SC200. If you have both internal and external devices connected, you must not terminate the card. See the following example which illustrates this concept.
SCSI Device 1 Termination Required (JP5 Open)
SCSI Device 2 Termination Required (End Device)
SCSI Device 3 No Termination Required (JP5 Short)