USER'S MANUAL
Contents
1. Advanced CMOS Setup Typematic Rate Programming Disabled Adapter ROM Shadow C800 16K Disabled Typematic Rate Delay msec 500 Adapter ROM Shadow CC00 16K Disabled Typematic Rate Chars sec 627 Adapter ROM Shadow D000 16K Disabled Above 1M Memory Test Disabled Adapter ROM Shadow D400 16K Disabled Memory test tick sound Enabled ROM Shadow D800 16K Disabled Memory Parity Error Check Disabled Adapter ROM Shadow DC00 16K Disabled Hit lt DEL gt Message Display Enabled System ROM Shadow E amp F 128K Enabled Hard Disk Type 47 RAM area 0 300 Non Cacheable Region Disabled 1 Wait for F1 if any error Enabled Starting Base OMB Addr System Boot Up Num Lock OMB Offset Floppy Drive Seek at Boot Disabled Block Size 4KB System Boot Up Sequence Non Cacheable Region Disabled 2 Cache Control Enabled Starting Base OMB Addr Fast Gate A20 Option Enabled OMB Offset Video ROM Shadow C000 32K Enabled Block Size 4KB Table 2 4 Advanced CMOS Setup Advanced NxVL TM Chipset Setup ISA Bus Speed CLK 5 16 Bit DMA Wait State 4 Wait Memory hole 14meg to 16meg Disabled 8 Bit DMA Wait State 4 Wait VL Bus Transfer Wait State 0 WS DMA Clock ISABCLK Alternate Instructions Off Note The ISA Bus Speed setting listed is for the P80 and P90 boards For the 7 set the ISA Bus Speed to CLK 4 For the P100 board set the ISA Bus Spe2. FUSE RATING 1A 125V THE USER IS CAUTIONED THAT CHANGES OR MODIFICATIONS NOT EXPRESSLY APPROVED BY THE MANUFACTURER COULD VOID THE USER S AUTHORITY TO OPERATE THIS EQUIPMENT Table of Contents INTRODUTCTIQN recort 1 FEATURES eis ecce toe dM Me T eod eer 1 ABOUT THIS MANUAL 2 CHECK IS Die EE 2 HARDWARE SETUP 5 eere eo eoe eoo eaae o Eran a auae 3 OVERVIEW ee eto aeree c 3 SYSTEM BOARD 4 STEP 1 CONFIGURING THES YSTEM eme nennen 5 STEP 2 INSTALLING THES YSTEM BOARD eee eene eene nn eene 5 STEP 3 INSTALLING DRAM e eee eene 6 STEP 4 VESA ISA BUS ADAPTER INSTALLATION PROCEDURE 7 STEP 5 CONNECTING EXTERNAL PERIPHERALS eee eene 7 STEP 6 RUNNING BIOS 7 SOFTWARE CONFIGURATION OF SYSTEM BOARD COMPONENTS 9 OVERVIEW 9 AMI PIOS O SETUP nice te teer ed 9 RUNNING THE BIOS 10 HARD DISK nennen rn enn n nsns 15 ADVANCED SETUP ssec e ec OE TRIS 17 FACTORY RECOMMENDED CMOS SETTINGS FOR AMI BIOS USERS 22 TECHNICAL REFERENCE aiiccccccccccscccccsscsscocesc
3. 16K Shadow 00 16 Shadow D000 16K Shadow D400 16K Shadow 0800 16 Shadow 0 00 16 These options control the shadowing of adapter ROMs in the specified areas of memory Unless you are sure no adapter RAM resides in the area you wish to shadow these should remain disabled Non cacheable Region 1 Non cacheable Region 2 These options along with the Base address Offset and Block Size options permit two areas of memory to be defined as non cacheable fimerican AMIBIOS Setup Megatrends C 1994 American Megatrends Inc Setup utility EE Advanced Setup etectSlave Pri IDE Diski 32 bit mode Disabled block mode Disabled LBA mode Disabled Pri IDE Disk2 32 bit nae Disabled block mode Disabled LBA mode Disabled Secondary IDE Controller Diski Absent Sec IDE Diski 32 bit mode Disabled block mode Disabled m Fail safe Set Advanced Features Figure 8 Advanced CMOS Setup Menu Page 4 of 4 Pri IDE Disk1 32 bit mode Pri IDE Disk 2 32 bit mode Block Mode LBA Mode These settings control the hard disks connected to the primary IDE controller in the system The 32 bit mode setting when enabled uses 32 bit data transfers on the IDE data port When disabled the BIOS uses 16 bit data transfers to the IDE drive In order to make use of 32 bit mode your IDE controller must also support 32 bit transfers between the controller and the CPU Block mode enables the use of multi sector
4. reads and writes to the selected IDE drive LBA Logical Block Address mode is a method of addressing hard drives greater than 528MB in size If you are installing a drive greater than 528MB LBA Mode must be set to enabled Also the hard drive must have been formatted and portioned with LBA Mode enabled in order to operate properly Secondary IDE Controller Disk1 Secondary IDE Controller Disk2 These options tell the BIOS whether additional drives are connected to the secondary IDE controller The options are Present and Absent Sec IDE Disk1 32 bit mode Sec IDE Disk 2 32 bit mode Block Mode 20 LBA Mode Refer to the description for the primary IDE settings above Chipset Setup This option configures chipset specific features These parameters have already been optimized for your system improper use of this utility could result in system failure Consult your dealer before attempting to use this option fimerican AMIBIOS Setup Megatrends lt gt 1994 American Megatrends Inc Setup Utility Chipset Setup ISA Bus Speed ONxCLK S Memory Hole 14MB to 16MB Disabled UL Bus Transfer Wait State 8 Wait etectSlave Alternate Instructions k Off 16 Bit DMA Wait State 4 Wait 8 Bit DMA Wait State 4 Wait DMA Clock ISABCLK Fail safe Figure 9 Chipset Features Setup Menu ISA Bus Speed This option controls the divisor between the CPU s clock and the clock sent to the ISA bus This option is set au
5. system components such as time and date floppy drivesand hard disk drives The Advanced menu permits the user toconfigure and setsome of the more complex settings for system components such as floppy drive swapping system caches shadow RAM control interrupt mapping Finally the Chipset menu controls some of the hardware specific options of the NxVL chipset M iik Advanced Chipset Utility Window This window contains three menus DetectMaster DetectSlave and Color Set The DetectMaster menu allows IDE EIDE hard disks to be automatically detected configuring the proper number of heads cylinders and sectors to make full use of the drive The DetectSlave menu performs the same operation for the slave or 2nd IDE hard disk installed in the system The Color Set menu allows you to control the color settings for optimal viewing on all type of displays cm DetectMaster DetectSlave Color Set Security Window This window contains two menus Password and Anti Virus The Password menu allows you to set a password that will be required each time the system is turned on If you forget your password you will need to use the CLEAR CMOS jumper to erase the password Doing this will also clear all of the other settings which you have made in any of the setup menus The Anti Virus option when enabled issues a warning to the user whenever a program attempts to write to the boot sector of the hard disk or program attempts to format the ha
6. 0 0 65535 754 65535 256 65535 918 65535 65535 1024 128 65535 512 128 987 987 820 977 981 512 65535 65535 65535 855 319 733 663 guy 977 1023 732 732 733 336 925 925 754 754 699 823 918 1024 1024 1024 612 1024 1024 615 987 987 820 977 981 830 830 918 1223 17 17 17 17 Hn 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 FF 17 17 17 17 17 17 17 50MB 20MB 43MB 20MB 41MB 57MB 60MB 30MB 43MB 30MB 10MB 54MB 69MB 44MB 69MB 41MB 68MB 53MB 94MB 128MB 43MB 10MB 77MB 68MB 41MB 25MB 57MB 41MB 41MB 41MB 48MB 69MB 114MB 152MB Advanced Setup This option permits the user to configure and setsome of the more complex settings forsystem components such as floppy drive swapping system caches shadow RAM control interrupt mapping CAUTION Users are not encouraged to change Advanced CMOS settings unless they are familiar with doing so Improper use of these utilities can result in system failure Use the arrow keys tohighlight the icon labeled Advanced then press Enter The following screen appears fimerican AMIBIOS Setup Megatrends lt gt 1994 American Megatrends Inc Utility Ep fidvanced Setup Tupematic Rate Chars Sec System Keyboard Present Primary Display UGA EGA Mouse Support k Disabled Above 1MB Memory Test Disabled Memory Test Tick Sound Enabled Parity Error Check Disabled
7. 24 MB 2MB x 32 2MB x 32 2MBx 32 2MB x 32 32 MB 2MB x32 2MB x 32 4MB x 32 4MB x 32 48 MB 2MB x 32 2MB x 32 8MBx 32 8MB x 32 80 MB 4MB x 32 4MB x 32 2MBx 32 2MBx 32 1MBx 32 1MBx 32 56 MB 4MB x 32 4MB x 32 2MBx 32 2MB x32 2MBx 32 2MB x 32 64 MB 4MB x 32 4MB x 32 2MBx 32 2MBx 32 4MBx 32 4MB x 32 80 MB 4MB x 32 4MB x 32 2MB x 32 2MB x 32 8MB x 32 8MB x 32 112 8MB x 32 8MB x 32 4MB x 32 4MB x 32 1MBx 32 1MBx 32 104 MB 8MB x 32 8MB x 32 4MB x 32 4MB x 32 2MB x 32 2MB x 32 112 MB 8MB x 32 8MB x 32 4MB x 32 4MB x 32 4MB x 32 4MB x 32 128 MB 8MB x 32 8MB x 32 4MB x 32 4MB x 32 8MB x 32 8MB x 32 160 MB 8MB x 32 8MB x 32 8MB x 32 8MB x 32 1MB x 32 1MB x 32 136 MB 8MB x 32 8MB x 32 8MB x 32 8MB x 32 2MB x 32 2MB x 32 144 MB 8MB x 32 8MB x 32 8MB x 32 8MB x 32 4MB x 32 4MB x 32 160 MB 8MB x 32 8MB x 32 8MB x 32 8MB x 32 8MB x 32 8MB x 32 192 MB Table 1 Partial RAM Configuration List Step 4 VESA ISABUS Adapter Installation Procedure To install a VESA or ISA Bus adapter card 1 Locate a free VESA or ISA Bus slot on the system board either a VESA or ISA slot whichever is appropriate for the card to be installed 2 Remove the appropriate expansion slot cover plate from the chassis 3 Line up the adapter along the slotto be used and insert the gold edged connectors into the connector on the motherboardcomplete
8. At Boot When set to enabled the BIOS performs a seek command on all floppy drives before booting System Boot Up Sequence This option controls the order in which the BIOS looks for a boot device The options are A then and C then System Boot Up CPU Speed This option controls whether the CPU is booted in the Turbo or non Turbo mode CPU Cache This option enables or disables the internal and external CPU caches When set to disabled both the internal and external CPU caches are disabled Password Checking This option enables the prompting for a password each time the system is booted or the user exits the Setup utility The settings are Setup or Always If Setup is selected the password prompt will only be asked when attempting to enter the setup utility Video Shadow C000 16K Video Shadow C400 16K These option control the shadowing of the video BIOS area When enabled the video BIOS ROMs are copied into system DRAM for faster execution fimerican AMIBIOS Setup Megatrends 1994 American Megatrends Inc Setup Utility Tul Advanced Setup Shadow C800 16K Disabled Shadow CC00 16K Disabled Shadow DO0808 16K Disabled Shadow D400 16K Disabled Shadow D800 16K Disabled Shadow DC88 16K Disabled Non cacheable Region 1 Disabled Base Address OMB Offset KB Block Size Fail safe Set Advanced Features ALt H Figure 7 Advanced CMOS Setup Menu Page 3 of 4 19 Shadow C800
9. Hit DEL Message Display Enabled Extended BIOS RAM Area 0 300 Wait For Fi If Error Enabled Fail safe Set fidvanced Features Figure 5 Advanced CMOS Setup Menu Page 1 of 4 Typematic Rate Controls the rate at which keystrokes are repeated if a key is held down The selections are 15 20 24 or 30 characters per second System Keyboard This option controls whether an error message is generated if no keyboard is attached This permits the system to boot without displaying the Press F1 to continue message if no keyboard is attached Primary Display Selects the type of primary display connected to the system The option are Monochrome Color 40x25 Color 80x25 VGA EGA PGA or Not Installed Mouse Support When enabled this option permits the use of a PS 2 style mouse Above 1MB Memory Test When this option is enabled the entire memory range is tested during the POST If disabled only the first 1 MB of system RAM is tested with the remaining memory only checked for size by the POST Memory Test Tick Sound This option enables or disables the tick sound heard from the PC speaker during the memory test routine of the POST Parity Error Check This option determines whether system DRAM should generate parity check errors If your DRAM SIMMs are 32bit non parity SIMMs this option should be set to disabled If your DRAM SIMMs are 36bit parity SIMMs you can set this option to either enabled or disabled Hit DEL Mess
10. USER S MANUAL Nx586 VESA ISASystem Board July 26 1995 NexGen NOTICE Copyright 1995 NexGen Inc ALL RIGHTS RESERVED DOCUMENT NO MANXXXX XXXXXX Document Revision July 95 No part of this document may be photocopied reproduced stored in a retrieval system transcribed or translated to another language in any form or by any means electronic mechanical magnetic optical chemical or otherwise without the prior written consent of NexGen Inc NexGen Inc reserves the right to revise this document and make changes in the specifications of the product described herein at any time without notice and without obligation to notify any person of any such revision or change NexGen Inc makes no warranty express implied or statutory concerning this document or its use and assumes no responsibility for any omissions or errors which may appear in this document nor does it make a commitment to update the information contained in this document NexGen INC SPECIFICALLY DISCLAIMS LIABILITY FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING FROM THE ACQUISITION USE OR SALE OR OTHER TRANSFER PERMITTED OR OTHERWISE OF THIS DOCUMENT OR THE USE OF THE PRODUCTS DESCRIBED IN THIS DOCUMENT Nexgen and Nx586 are registered trademarks of Nexgen Corporation AMI is a registered trademark of American Megatrends Inc First printing September 1994 WARNING FOR CONTINUED PROTECTION AGAINST FIRE REPLACE FUSE WITH SAME TYPE AND RATING
11. age Display Setting this option to disabled will prevent the Hit DEL if you want to run Setup message from being displayed during the system boot process Extended BIOS RAM Area This option controls where the hard disk information will be stored in memory The options are 0 300 or Top 1K If Top 1K is selected the hard disk information will be stored beginning at 639K instead of the normal 0 300 memory location Wait For F1 If any Error During the power on self test of the system if the BIOS detects any errors it will display the message Press F1 to continue If this option is disabled the boot process will not wait for the F1 key to be pressed before continuing to boot fimerican AMIBIOS Setup Megatrends C 1994 American Megatrends Inc Utility fidvanced Setup etectSlave Sustem Boot Up Num Lock On Numeric Processor Test Enabled Floppy Drive Seek At Boot Disabled Floppy Drive Swapping Disabled System Boot Up Sequence Cr A System Boot Up CPU Speed High CPU Cache Enabled Password Checking Setup Video Shadow C888 16K Enabled Video Shadow C400 16K Enabled Fail safe Set Advanced Features Figure 6 Advanced CMOS Setup Menu Page 2 of 4 System Boot Up Num Lock When set to ON this option turns off the keyboards Num Lock setting after booting Numeric Processor Test Enables or disables the detection of a installed numeric coprocessor Floppy Drive Seek
12. cceacssccscecescccsocsscscsasescests 25 586 SYSTEM BOARD JUMPER 25 CONNECTORS 4 sse teste er votes cones dus oko laos EY ES Eee det aote Fe 25 BATTERY eene eme hne een enhn en nnns 25 This page is intentionally left blank Introduction Congratulations on your purchase of theNexGen Nx586 system board part of the family of high performance personal computer products fromNexGen This motherboard has been designed to fit in most standard AT and baby AT enclosures To avoid damage to your system please read the installation section thoroughly before attempting to install the motherboard or configure your system This chapter describes the features of the Nx586VESA ISA system board This chapter also provides an overview of this manual to help you locate information quickly Features The NexGen Nx586 system board includes the following features Supports NexGen Nx586 P80 P90 P100 microprocessors with 32KB internal cache NexGen NxVL chipset High performance 256KB write back secondary cache Supports up to 192MB of main memory on boardusing 72 pin SIMM DRAM Fast Page Mode modules Two 32 bit VESA compatible local bus expansion slots with bus mastering capability five 16 bit ISA Expansion slots Supports both hardware and software turbo switching Flash BIOS support for easy upgrading 3 year limit
13. ed to CLK 6 22 This page is intentionally left blank 23 Technical Reference Open Reserved for future use 1 2 Normal 2 3 Clear CMOS Factory use only CPU dependent Do not change from factory setting Warranty void if tampered with Closed VL Bus Write wait state 1 WS Closed VL Bus 33MHz Open VL Bus lt 33MHz Closed VL Bus Burst Support Read only Default Setting NOTE number settings indicate a closed jumper e g 1 2 3 4 Connectors Reset Switch Speaker connector SE Keylock Power LED connector HEB Turbo switch connector SEM Turbo LED connector Local bus slots 16 bit ISA slots Power connector PE External battery connector ix Keyboard connector Battery Options Depending upon the date which your motherboard was built it may have been shipped with two coin cells on the motherboard or an external battery pack connected to J22 Either option will work fine Due to the limited capacity of the coin cells you may experience a loss of CMOS memory within a year of use The external battery packs have a much greater capacity and will last up to 4 years under normal conditions When the onboard coin cells drain you may replace them with another set of coin cells or an external battery pack 4 5V or 6V which ever you prefer 25 26 This page is intentionally left blank 27 28
14. ed warranty About This Manual This manual is organized as follows The Hardware Setup section describes how to install and set up the Nx586 system board memory and peripherals Included in this section are the motherboard layout andORAM memory table The Software Configuration sectiondescribes the BIOS setup The Technical Reference sectiondescribes the jumper and switch settings for the Nx586 System board Checklist The following items are included with your Nx586 system board package Nx586 system board this manual If you suspect that any of the items in the system unit package have been damaged or that items are missing contact your reseller immediately Hardware Setup Overview This section provides instructions for installing and setting up your Nx586 system board installing memory modules and VESA ISA BUS peripherals CAUTION The procedures described are meant as general guidelines for the experienced installer Contact your dealer if you are unsure about the installation or if you need more detailed information about any portion of the installation The installation of your Nx586 system board consists of 6 basic steps Your installation may vary depending on your system configuration Step 1 Configure the system board Step 2 Install the system board into your computer chassis Step 3 Install the DRAM modules Step 4 Install any internal VESA ISA peripherals Step 5 Connect the m
15. etup When the system power isturned on the computer performs a series of device initializations and diagnostic tests During this process the system will allow you to interrupt the process and run Setup by pressing the Del key Whenthe Power On Self Test POST has completed the following message appears Press the lt Del gt key to enter the Setup program The table below describes special keys used to perform certain functionswithin the Setup program Keystroke lt Esc gt lt Arrow keys gt Alt H TAB Alt SPACE ENTER Table 2 Keyboard Use Setup Returns to previous screenor menu also used to exit setup Moves cursor from one option to the nextwithin a window or menu Displays Help screen Move to next window Global Exit Select item highlighted Exiting the Setup Program When finished making changes within Setup press the Esc key until the following menu shown in figure 2 appears Atthis point you are presented with the three choices described below American AMIBIOS Setup Megatrends lt 21994 American Megatrends Inc Setup Utility Exit Setup o Ad Save changes and Exit ter DetectSlave Do not save chaksges and Exit Security Fail safe Set Date Time Floppy Hard Disk Figure 2 Exit Setup Menu Save Changes and Exit This option is used to save the changes made during this sessionin the Setup program then continue the boot process After pressing lt Enter gt wi
16. gured to recognize the hard drives connected The most common type of hard disk today uses the IDE or EIDE interface This type of drive is very simple to install and configure The Nx586 system board supports up to four IDE EIDE hard drives using a primary and a secondary IDE channel Each channel supports up to two IDE EIDE drives or other IDE devices such as CDROMs or Tape Backup devices IDE EIDE drives can be configured simply by using the DetectMaster and DetectSlave commands in the Utility Window Hard drives are identified by several parameters Parameter Description Type The number designation for a drive with certain identification parameters Cyl Cylinders The number of cylinders in the disk drive Hd Heads The number of heads WP Write Precompensation The size of a sector gets progressively smaller as the track diameter diminishes Yet each sector must still hold 512 bytes Write precompensation circuitry on the hard disk compensates for the physical difference in sector size by boosting the write current for sectors on inner tracks This parameter is the track number where write precompensation begins Lz Landing Zone This number is the cylinder location where the heads will normally park when the system is shut down Sec Sectors The number of sectors per track Hard drives that use MFM have 17 sectors per track RLL drives have 26 sectors per track RLL and ESDI drives have 34 sectors per track SCSI and IDE dr
17. igned to fit into most standard AT Baby AT enclosures Follow the instructions for your particular chassis in order toinstall the Nx586 system board Make sure your chassis power supply can generate adequate power for your system board and peripherals For safety purposes NexGen recommends using only chassis that employ UL Listed power supplies WARNING The Nx586 processor requires adequate air flow to dissipate the heat generated by the processor Make sure that the processor fan is not obstructed and is operational If the fan is not working return the board to your dealer for an exchange Step 3 Installing DRAM Modules The Nx586 system board accommodates six72 pin 32 bit or 36 bit DRAM SIMM modules When installing memory the DRAM speed must be 70 or faster must support fast page mode The six SIMM slots are labeled in pairs as SM1 SM2 Bank A SM3 SM4 Bank B and SM5 SM6 Bank C The banks may be populated in any order Bank C then Bank A then Bank B etc but both SIMMs within a bank must be installed at the same time with the same density 1M 2M 4M of DRAM module Any of the following single density SIMMs 1M 4M or 16M or double density 2M 8M or 32M SIMM modules may be used Table 1 1 shows a short list of the possible memory configurations DRAM Configurations 1MB x 32 1MB x 32 8 MB 2MB x 32 2MB x 32 16 MB 4MB x 32 4MB x 32 32 MB 8MB x 32 8MB x 32 64 MB 2MB x 32 2MB x 32 1MB x 32 1MB x 32
18. ives may have even more sectors per track Size The formatted capacity of the drive based on the following formula Number of heads x Number of cylinders x number of sectors per cylinder x 512 bytes per sector Table 3 Hard Drive Configurations Older ST 506 MFM type hard drives require manual selection of these parameters The BIOS provides a table with 46 of the most common parameters for these drives Also a 47th entry can be used to enter any configuration not found in the table Refer to your hard disks manual for the proper settings if you have this type of drive Cyls Heads Write Landing Sectors Capacity Precomp Zone 1 306 4 128 305 17 10MB 2 615 4 300 615 17 20MB 3 615 6 300 615 17 31MB 4 940 8 512 940 Al 62MB 5 940 6 512 940 17 47MB 6 615 4 65535 615 17 20MB 462 8 256 511 17 31MB 8 733 5 65535 733 17 30MB 9 900 15 65535 901 17 112MB 10 820 3 65535 820 We 20MB 11 855 5 65535 855 17 35MB 15 12 18 14 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 81 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 Table 4 Standard Hard Drive Parameter Settings 16 855 306 733 612 977 977 1024 733 733 733 306 925 925 754 754 699 823 918 1024 1024 1024 612 1024 1024 615 987 987 820 977 981 830 830 917 1224 d o N OO HO eu uM E 10 15 15 65535 128 65535 300 65535 512 300 300 300
19. ly Make sure that the adapter is well seated in the slot Secure the adapter to the chassis with a slot cover screw 4 The system should automatically recognize the added adapter If you have added a video adapter and wish to use the extended video modes you may have to install additional drivers corresponding to the programs and environments used Step 5 Connecting External Peripherals Connect your monitor keyboard mouse AC power cord and other external devices to your chassis before powering on the system Step 6 Running BIOS Setup Once the motherboard has been mounted in the case and all of the peripheral connected the final step is to run the BIOS setup program When the system is turned on for the first time the BIOS will notice the addition of DRAM memory and other peripherals and prompt you to enter the setup utility The next section of this manual describes the use ofthe AMI 81050 Setup utility in configuring your System After running Setup you can proceed with installation of system and application software This page is intentionally left blank Software Configuration of System Board Components Overview This section describes how to use the included software to configure the components of your system board The utilities described include AMI BIOS Setup Introduction A program in the ROM permanent memory of your system board that configures RAM date and time the type of hard disk connected and virtual
20. ly all of the main system level components The BIOS Setup values may have already been set prior to shipment A record of the system parameters such as amount of memory types of disk drives video display numeric coprocessor and other peripherals is stored in a special area of memory called CMOS RAM When the computer is turned off a backup battery provides power to the CMOS RAM thereby retaining your system configuration Each time the system is turned on it is configured with the values in CMOS RAM unless the CMOS RAM was corrupted The CMOS Setup parameter resides in the CMOS RAM and is available each time the computer is turned on If for some reason the CMOS RAM is corrupted the system is configured with the default values stored in the ROM file There are two sets of BIOS values stored in the ROM file the BIOS Setup default values and the Power On default values see this section for more detailed information on BIOS defaults Note Your system may have been pre configured prior to shipment It is only necessary to execute the configurationprogram if A You have changed the hardware configuration i e added memory added or removed drives etc The system itself has detected an error while booting up and requires you to reconfigure CMOS RAM Users are not encouraged to run this setup program unless are familiar with it Improper use of this setup program can result in system failure Running the BIOS S
21. ndstored in CMOS to be changed Press Enter to bring up the modification screen then nove the cursor to the field you wish to change by using the arrow keys Change the setting by using and keys or entering the value directly with the keyboard The time uses a 24 hour clock format For P M numbers add 12 to the hour 4 30 P M is 16 30 00 Floppy Drives A and B Supports 720KB 1 44MB and 2 88MB 3 5 inch drives 360KB and 1 2MB 5 25 inch drives Move the cursor to either field with the arrow keys and set the appropriate floppy drive type using the arrow keys then pressing Enter Master and Slave H ard Disks Hard disk types from 1 to 46 are industry standard The USER type is user definable and can be used for boththe master and slavedrive If the USER type is selected the user must enter the proper hard drive parameters from the keyboard The parameters forthe USER type under the master hard disk and slave hard disk can be different which allows two different user definable hard disk drives in the system Not Installed can be used for diskless workstations The two remaining settings are for ESDI and SCSlhard disks Hard Disk Configuration Hard drives are available with many different types of interfaces and controller options The system BIOS has built in support for several of the most common interface standards IDE EIDE SCSI ESDI and ST 506 MFM In general depending on the controller used the BIOS needs to be confi
22. onitor keyboard and other external peripherals Step 6 Run the BIOS Setup program to configure your system board s memory hard drive and floppy drive parameters This section discusses the hardware installation portion of setting up your system Steps 1 throug d It also contains a diagram of the system board see Figure 1 1 System board Layout next page for reference purposes To run BIOS setup seethe Software Configuration Section for the AMI BIOS amp Step 6 System Board Layout Familiarize yourself with the components of the Nx586 system board ISAE iP HNEION SLOTS YEO ARD S ILE SOTS Figure 1 System Board Layout n g bi m CONNECTOR Step 1 Configuring the System Board The Nx586 system board options are configured through both software BIOS and hardware jumpers The software BIOS configuration settings are discussed in the Software Configuration section of this manual and the Technical Reference section of this manuallists all of the jumper settings for the Nx586 system board We do not recommend changing ANY jumper settings unless the user is an experienced installer misuse of jumper settings can result in system board failure and or loss of warranty Step 2 Installing the System Board CAUTION Make sure to observe precautions for handling static sensitive devices Static electricity can harm components on your Nx586 system board and cause system failure The Nx586 system board is des
23. rd disk Sg Password Anti Virus Default Window This window contains three menus Original Optimal and Fail safe These three menus set all of the Standard Advanced and Chipset settings to preprogrammed values by the factory Under most conditions the optimal settings should be used to achieve the best overall system performance If you experience any abnormal system behavior try using the Fail safe settings If you change your mind after selecting either the Optimal or Fail safe settings before you save changes and exit the Original menu can be used to restore and modified parameters to their original values before exiting Original Optimal Fail safe The remainder of this section details the options and screens available in each of these menus Standard Setup This option permits the user to configure and set system components such as time and date floppy drives and hard disk drives Use the arrow keys tohighlight the icon labeled Standard then press Enter The following screen appears American AMIBIOS Setup Megatrends C 1994 American Megatrends Inc Setup Utility v Ep Standard Setup Standard DetectSlave A Date Time Securi Master Disk Slave Disk 5 aw Password Anti Virus Original Optimal Fail safe Current Date Sun Jul 89 1995 Current Time 22 06 52 Figure 4 Standard CMOS Setup Menu Date Time This option permits the month day year hour minute and seco
24. th this option highlighted all settings that were modified are stored in CMOS RAMthen a CMOS RAM checksum is calculated and written to CMOS RAM Control is then passed to the ROM BlOSand the BIOS either reboots the system if any new setting changed the memory map or continues the boot process Do Not Save Changes and Exit This option passes control to the BIOS without writing any changesnade to the CMOS RAM Press lt Enter gt with this option highlightedto continue the boot process without saving any altered system parameters Continue Press lt Enter gt with this option highlightedto return to the main menu of the Setup program Main Menu Setup Screen The Setup Main Menuis shown below American AMIBIOS Setup Megatrends C 1994 American Megatrends Inc pr Advanced Chipset DetectMaster DetectSlave Color Set Password Anti Virus i Fail safe Set Date Time Floppy Hard Disk Figure 3 Main Setup Menu The Main Setup Menu is divided into four windows each with several submenu options Setup Window Utility Window Standard Setup Detect Master Hard Disk Advanced Setup Detect Slave Hard Disk Chipset Setup Color Set Security Window Default Window Password Original Settings Anti Virus Optimal Settings Fail safe Settings Setup Window This window contains three menus Standard Advanced and Chipset The Standard the user to configure and set
25. tomatically to the proper divisor by the BIOS and should not be modified under normal conditions Memory Hole 14MB to 16MB This option forces a hole in the systems DRAM between 14MB and 16MB Some operating systems may require a hole in this memory space This option should be set to disabled for DOS Windows OS 2 systems VL Bus Transfer Wait State This option when enabled forces 1 wait state to be inserted in all VESA bus operations Alternate Instructions This option should be left disabled 16 Bit DMA Wait States This option controls the number of wait states during 16 bit DMA cycles This option should be set to 4 Wait States under normal operation 8 Bit DMA Wait States This option controls the number of wait states during 8 bit DMA cycles This option should be set to 4 Wait States under normal operation DMA Clock This option controls the divisor between the ISA Bus Clock and the DMA controller Under normal operation this should be set to ISABCLK 21 Factory Recommended CMOS Settings for AMI 1050 users The factory recommended settings are listed below These settings should be used in the event CMOS RAM has been corrupted or for some reason you wish to reset CMOS to the factory s recommended settings However if your hard disk does not have an operating system change the Setting at System boot up sequence to A C For Adapter ROM shadowing enable shadow whenever appropriate i e adapter card has on board BIOS
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