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VESA LOCAL BUS

1. LO VL BUS 3486 786 MINI BOARD USER S MANUAL M EENEN TY ET UN FO Fd LIYD sre Nay aeger Introduction 2 Chapter Main Features of System Board 3 Intel 486SX 486DX 2 486DX 386DX Microprocessor nenne 3 2 64 On Board Memory 3 Secondary Cache Memory System 3 USA Integration Chip 4 8 Fully Accessible Bus 10 ii Component 8 Chapter 2 Hardware Configuration 9 Static Discharge Precautions 9 Juniper SUNOS 9 Cache Memory Size Jumper 10 l 486 DX SX Selection Jumper 12 C Numeric Processor Jumper 12 CPU Type Jumper 13 486 50 MHz CPU Jumper 13 CPU Clock Frequency Jumper 14 VESA Local Bus Jumper 15 Battery Setting Jumper 15 Processor 16 02 02 16 Memory 17 Available SIMM Configurations 17 Installing 51 5 19 i Automatic Memory Sizing 19
2. 4 4 None 1 MB 0 4 4MB 256 1 4 SMB 1 256 4 1 SMB 1 1 4 4 8MB 17 None 4MB 256 KB 4MB 4MB 256 KB 1 MB 4MB 4MB 1 MB 4MB 4MB 16MB none none 16MB 16MB 0 16MB 0 16MB 16 MB 16 17 MB 16 1 17 4 16 20 16 4 20 16 16 32 64 0 64 0 64 64 Fig 12 Memory Configuration Chart No SIMMs installed Bank 0 Type Bank 1 LE 1MB 2 16 Installing SIMMs Before installing or removing SIMMs on the system board turn off the power supply You should refer to Available SIMM Configuration to find out the desired memory configuration Make sure only same type of SIMMs are used in each bank SIMM modules of different types are not allowed within the same bank Whether Bank 0 only Bank 1 only or both memory banks are installed you should start the installation from the right side of the board and proceed to the left near the ISA expansion slots A small hole is present on both ends of each SIMM They are used to snap the SIMM into the socket Orient the SIMM module such that the side without memory chips faces the ISA expansion slots Insert the SIMM firmly at C an 45 degree angle in the SIMM socket and push the SIMM module down and to the right towards the ret
3. 1 128 256 JM P1 Setting 64 CACHE 64 CACHE MAIN MEMORY lt 16MB 16 MB lt MAIN MEMORY lt 32 MB 963 1 1 JR 128 CACHE EE 128 CACHE sis MAIN MEMORY lt 32 MB 5 32 lt MEMORY lt 64 1 256 CACHE 256 2 MAIN MEMORY lt 32 9 32 lt lt 64 Fig 3 Cache Size Jumper Setting 11 486 DX SX Selection Jumper This jumper must be set according to the type of 486 processor in use It is marked on the main board as JMP 2 The available settings are MEDD MIC 486 DX 486 SX 4 486 DX SX Selection Jumper Numeric Processor Jumper This jumper JMP4 must be set in the presence of a 80387 math coprocessor 1 8038 NO NPU PRESENT PRESENT Fig 5 387 Numeric Processor Jumper CPU Type Jumper You must set this jumper JMP5 to select either a 486 386 CPU ES WITH WITH 80386 80486 C Fig 6 CPU Type Jumper 486 50 MHz CPU Jumper Close the jumper JMP7 when a 486 50 MHz CPU 1 present lt Ea ee WITH WITHOUT 486 50 486 50 Fig 7 486 50 CPU Present Jumper CPU Clock Frequency Jumper Set this jumper JMP 9 according to the type of CPU installed CPU Jumper Closed 386 40 1 5 2 6 386 33 1 5 3 7 4 8 386 25 1 5 2 6 4 8 486DX 50 3 7 486DX 33 486DX2 66 3 7 4 8 486SX 25 486DX2 50 2 6 4 8
4. 256 KB x9 1MBx 9 4 MB x 9 and 16 MB x 9 SIMM modules which should satisfy even the most demanding applications Secondary Cache Memory System To compliment the microprocessor s internal cache and to reduce the need for main memory access a secondary cache system 1 vided utilizing 64 KB 128 KB or 256 KB bytes of high speed SRAM The Secondary Cache System utilizes Write Back Algorithm for optimum speed and performance Cache memory 1 used to store the most recently used instructions or data When the system is reset or powered up the cache memory is empty As the CPU reads data or instructions from the main memory this information 1 copied into the cache memory Con tents of cache memory are referenced by cache tags stored in high speed SRAM tag memory When an address is applied to access data or instructions the tags are compared with the address and ac cess to the contents of cache memory is granted if the tag and the address match This is called a cache hit If they do not match it is called a cache miss and a main memory read cycle is performed Since the typical access time of cache SRAM is about 20 to 25 ns compared to the 60 to 100 ns for main memory DRAM cache memory access is much faster However the actual increase in sys tem performance depends on the nature of the software application Operation of the internal and secondary cache is transparent to the user and to the software When th
5. Available Cache SRAM Configuration 20 Installing Cache 21 Chapter 3 Installation Guide eee 24 Static Discharge Precautions 24 Installing The System Board 24 Installing Power Connector 25 Connecting the Keylock Reset amp Turbo Switches 26 Chapter 4 Using the BIOS 2T Intr i The 786 AIO system board 15 a MINI AT size fully PC AT compatible motherboard with two 32 bit VESA standard Local Bus slots and the ability to use 486 or 386 microprocessor It combines the latest technology with design elegance unsurpassed by other comparable system boards With a sophisticated secondary cache of 64 KB 128 KB or 256 KB high speed SRAM and a maximum of 64 MB on board main memory it is well suited for all high end applications such as file servers and advanced workstations The 786 AIO system board incorporates the highly integrated USA Integration chip set System reliability is greatly enhanced by using this chip set with few other discrete components The memory banks on the system board are located on the side of the expansion slots Full length cards can be installed in all expan sion slots Seven 16 bit expansion slots two with 32 bit Local Bus socket and one 8 bit slot are provided Intel 486 DX 486 DX 2 486 SX and
6. and you do not wish to alter the size of the Cache Memory please skip this section Otherwise we assume you installing cache SRAM on the system board for the first time or you wish to change the size of the cache memory Two types of SRAM 8 KB x 8 and 32 KB x 8 are used to obtain different cache sizes Correct cache size 1 obtained by using the proper type of SRAM for the Cache Memory AND the Cache Tag The Cache Tag stores the address of the information that is located in the cache Its function 1 similar to a look up table the processor looks the cache tag for the required address if the address is found the corresponding cache memory location 1 accessed Otherwise the main memory is accessed Before proceeding to installation notice the following Observe static discharge precautions Timing requirements of the Cache Memory and the Cache Tag are different Access time of Cache Memory chips should be equal to or less than 25 ns and 20 ns or less for the Cache Tag SRAM Special tools may be required to remove the installed SRAM chips from their sockets without causing damage If you are unsure of your ability to perform the installation you should have a trained technician perform the installation for you 2 Identify the type of SRAM chips already installed on the board Two types of chips are used 8 KB x 8 and 32 KB x 8 The actual identification on the chips are quite diff
7. the 640KB base memory Default is DOS 1KB Wtit For lt 1 gt If Ang Error System halts when error is encountered Resume operation wher lt 1 gt is pressed Default is Enabled System Boot Up Mum Lock Enables the numeric keys on the keypad upon power up instead of the regular arrow key functions Default 15 Weitek Processsor If installed enable Weitek Processor by setting this feature to Present Default setting is Absent System Boot Up Sequence the default boot sequence is C A from drive C to drive A It can be reversed to A C from drive A to dr ive C System Boot Up CPU Speed Default is High Cache Memory controller CPU Internal Cache Memory Con troller enable Default is Enabled Internal Cache Memory Internal Cache Memory enable Default is Enabled Fast Gate A20 Option Default is Enabled Password Check Option This feature can becaused to prevent unauth orized system boot up or unauthorized use of BIOS CMOS setup pro gram Two options are available 1 Always Prompt for password is displayed when the system is po wered up 2 Setup Prompt for password is displayed when CMOS setyp pro gram is accessed If enabled the user has three attempts to enter the correct password After the third incorrect attempt the system locks up and a reboot is reguired To enable this feature or to change the pas
8. 386 40 IE ERE 386133 386 25 ac 486DX 50 486DX 33 486DX2 66 486SX 25 486DX2 50 Fig 8 CPU Clock Frequency Jumper 14 VESA Local Bus Jumper Do not change the default factory setting of jumper JMP 6 Fig 9 VESA Local Bus Jumper Battery Setting Jumper An optional external battery can be attached to the board via jumper pins J7 Battery setting jumper JMP3 is used to select the built in internal battery the external battery or to erase the current CMOS setup in case of the its setting becomes corrupt and unusable The setting for JMP3 is as below ee nv EXTERNAL INTERNAL DISCHARGE BATTERY BATTERY CMOS Fig 10 Battery Setting Jumper Processor Installation Installing CPU Special care should be taken when you install the CPU It should be installed only when the system board has not yet been installed inside the system case You should be aware of possible static discharge causing damage to the CPU and system board The system board should be laying on a flat surface facing upward and be supported by a firm pad of foam or rubber Locate the CPU socket on the system board The socket T has many holes which match the pins on the CPU itself E One comer of the socket is notched this is the pin 1 comer of the socket The CPU has a notched pin 1 comer as well which is also indicated by a dot at that comer Carefully align the CPU with the socket so that the notched c
9. 386DX microprocessors can be used Other features include programmable bus speed 2 programmable non cacheable areas and BIOS shadow RAM The system board is fully compatible with many operating environ ments including MS DOS Windows UNIX XENIX OS 2 and the NOVELL Netware Operating System Chapter 1 Features of Svstem Board Intel 486SX 486DX 2 486DX 386DX Microprocessor The Intel 486 microprocessor offers the highest performance possi ble for all operating systems and applications Its one million transistors integrate 8 KB of internal cache with a built in cache controller floating point coprocessor except 486SX and memory management unit while it remains fully compatible with 386DX and SX microprocessors The Intel 486DX 2 clock doubling microprocessor operates at the maximum rated internal speed while it interfaces with external logics in half the internal clock rate The DX 2 processor offers the best price performance ratio possible The 386 DX microprocessor has the same 32 bit addressing and instruction capability but it does not contain an internal cache or a built in floating point processor It is an entry level member the 486 386 family of microprocessors The 78 6AIO Motherboard can utilize all the follow microprocessors 486 DX 486DX 2 486 SX and 386DX 64 MB On Board Main Memory The 786 AIO system board has 2 DRAM banks Four types of SIMMs are supported for up to 64 MB on board memory
10. WORD C 1990 American Menatrends Inc All Rights Reservedl Enter current password Use Maximum 6 ASCII Characters ESC Exit Hard Disk Utillity This utility is for MFM encoded hard drives only It peroforms low le vel formatting Mfm HARD DRIVES the options in this utility are data destructive and they should be used only when low level for matting is required 1 Hard Disk Format Perform low level format on hard disk 2 Auto Inter leave determines the optimum inter leave factor by mea sureing the transfer rate for four different inter leave values prior to formatting 3 Media Analysis performs an analysis of each track of the hard drive to determine whether it is usable If the track is found unus K able it is marked as bad in the bad Track List Table IDE ESDI and SCSI hard drives cannot use the AMI BIOS hard disk utility Separate utilities are reguired for these drives Fig 15 AMI BIOS Hard Disk Utility Screen C l990 American Megatrends Inc All Rights Reserved Head Wpcom LZone Sect Size MB Hard Disk C Type 47 USER TYPE 873 13 00 37 199 Hard Disk D Type Not Installed Hard disk Type can be changed from the STANDARD CMOS SETUP i option in Main Menu gt Hard Disk Format Auto Interleave Media Analysis ESC Exit XXXX F2 F3 Color e 37 Write To CMOS And Exit After the completion of all setups choose Write To CMOS And Exit to save the data and val
11. aining arms of the socket The SIMM should gently snap into place Repeat the above process until the desired memory size 18 reached Automatic Memory Sizing Once the system is powered up the BIOS automatically determines how much memory is present in the system However it needs to be configured before the system can operate Please refer to Chapter 4 Using the BIOS setup for more information Available Cache SRAM Configuration Up to 2 banks of data cache SRAM are supported on the 486 ISA system board to give possible cache size of 64 KB 128 KB and 256 KB The access time of the cache SRAM must be 25 ns or better Two types of SRAM are used to achieve different cache sizes Data Cache Size Bank 0 Bank 1 64 KB four 8 KB x 8 four 8 KB x 8 128 KB four 32 KB x 8 256 KB four 32 KB x 8 four 32 KB x 8 Cache Banks are labeled on the system board as follows Cache Bank 0 U18 019 920 and U21 Cache Bank 1 U22 U23 U24 and U25 The corresponding SRAM Tag size is as follows Data Cache Size Memory Size SRAM Tag Size 64 KB 1 lt 16 MB 8Kx8 64 gt 16 lt 32 8Kx8 16 4 128 lt 32 MB 8Kx8 128 KB gt 32 lt 64 MB 8Kx8 16Kx4 256 1 lt 32MB 32 8 256 gt 32 lt 64 32 8 16 4 The tag SRAM is located the system board 926 27 Fig 13 The SRAM 20 Installing Cache SRAM If the 786 AIO system board has SRAM installed already
12. bled Diagnostic bits 041 7 0 486 Internal Cache F000 Enabled Diabnostic bits 03DH 7 0 12 ESC Exit XXXX Ctrl Pu Pd Modify F1 Heip F2 F3 color F5 Old Values F6 RIOS Setup Defaults F7 Power on Defaults 34 Auto configuration with BIOS Defaults This option allows the use of default system values befor the user has made any changes to the CMOS If the CMOS is corrupted the BIOS default settings are used Auto Configuration With Power on Defaults This features uses the CMOS values from the last system power up It is useful as a diagnostic aid if the system is having abnormal behavior 35 Change Password The Password Check option is enabled when the system board is ship ped With default password AMI The maximum length of pas sword is 6 characters If Password is Enabled To disable the password check enter a return character at the New Password prompt and press return again to confirm To change the current pas sword enter the current password at Current Password prompt You will be asked to enter a new password Enter the new passowrd and press return Enter the password again and press return to confirm the setup If Password is Disabled To enable the password check enter a new password at the New Password prompt and press return Enter the password again and press return to con firm the setup Fig 14 Password Setup Screen BIOS SETUP PROGRAM CHANGE PASS
13. ching a grounded metal object or by wearing a grounded static wrist strap Handle the system board by the edges whenever possible Avoid touching the surface on the system board and put the system board in a static safe plastic bag before transportation Jumper Settings Jumper switches allow the user to choose among two or more modes of operations The switches have pins projecting from the system board A jumper cap is used to make connection between two jumper pins A jumper switch is closed when a jumper cap is installed and it is open when the pins are not connected by the jumper cap Cache Memory Size Jumper Two jumpers have to be set to choose the secondary cache memory size JMP1 and JMP Jumper JMP1 has 3 rows of pins adjacent to each other has the following settings Cache Size Memory Size Jumper Setting 64 kBytes 1 lt 16 MB pins 1 2 4 5 7 8 closed 64 kBytes gt 16 lt 32 MB pins 1 2 4 5 7 8 closed 128 kBytes z32 MB pins 2 3 4 5 8 9 closed 128 kBytes gt 32 lt 64 MB pins 2 3 4 5 7 8 closed 256 kBytes 1 lt 32 pins 2 3 5 6 8 9 closed 256 kBytes gt 32 lt 64 MB pins 2 3 5 6 7 8 closed Jumper JMP8 has two rows of pins It has the following settings Cache Size Jumper Setting 64 KBytes pns 1 2 4 5 closed 128k Bytes pns 2 3 4 5 closed 256k Bytes pins 2 3 5 6 closed 10 CONFIGURATION JUMPER JMP 8 Setting 64
14. ere are many more cache hits than misses the cache hit ratio is high Memory access becomes virtually immediate and zero wait state memory access is achieved USA Integration Chip Set The USA Integration chip set has the following features Direct mapped organization with write back protocol 0 wait state for cache read write hit Programmable cache read write hit wait state Cache controller can be enabled or disabled Programmable cache line size Flexible cache size One or two bank of cache SRAM Flexible direct SRAM access mode Support for both hidden and conventional DRAM refresh Support for two independent non cacheable regions Video and System BIOS Shadow be cacheable in either the secondary cache or the 486 internal cache Support of fast Gate A20 operation for optimization of OS 2 operations Support for Fast Standard page mode DRAM Support for 2 banks of DRAM with memory size up to 64 MB Flexible system memory configurations Support mixable 256 KB x 9 1 MB x 9 4 MB x9 and 16 MB x 9 SIMM modules between banks Programmable DRAM wait state Programmable cache flush Relocation of unused first MB segments 128 KB 256 KB or 384 KB to top of DRAM memory Automatic memory size detection CPU interface logic Data bus buffer control logic Reset and shutdown logic NMI and port B support Feedback CPU clock to reduce clock skew Support for turbo non turbo mode Support for so
15. erent and they are manufacturer dependant Consult the respective chip manufacturer s hardware guide to determine the appropriate part required Two alternatives may be used to determine the current cache memory size If the system board is already installed in a complete computer system tum on the power and observe the reported cache size on the screen Remove the system board from the case before proceeding to installation Read the Cache Memory Jumper setting on the system board and the number of cache memory banks occupied Compare the jumper setting and the number of SRAM banks occupied with Fig Cache Memory Setting to determine the current cache size The system board should be laying flat on a firm surface facing upward supported by a piece of foam or rubber Locate the SRAM sockets on the system board Carefully remove the installed SRAM chips if necessary Prepare the SRAM chips to be installed by orienting the chips correctly as in Fig 1 Each chip has a notch on one end and 1t should match the notch on the socket where the chip is to be installed Align the pins on the chip with the holes in the socket Press the chip down firmly Inspect the pins on the chip to make sure that none are bent Install each chip individually until the desired cache size 1 reached 22 Locate the cache memory jumper blocks 1 JMP8 on the system board Set the jumpers according to the installed cache s
16. ftware turbo switch Support for conventional hidden refresh Programmable bus clock DMA interface and arbitration logic Refresh address and control logic Data bus conversion logic Bus interface between different data buses Parity generation and checking logic 14 3 18Mhz and divide 12 counter AT Bus I O recovery option for slower cards i D 2318 2 2 222 E3 ES ES 4 L8 2 o 4 19 05 ev 44 X4 223 F2 oz l A Qt Si LD A Ot 6 9 4 9 g 2 2 1 V Sov vov 16 02 l v ai tcv UN CLQaQa ev av 91 SIV ISSA riv ttv ev uv 6v 8 UN OW tv tw cv Iv ov NOISE ISSA oOx SOX 99x ax Olax 110X 15530 1030 029 1028 0027 026 1025 1024 VSST vOO13 NN33978 N39404 N2QY39 01 OSYSCLK OPS 0 2 pro CLUKIN 0013 PMIO PROYN VSST vDo013 LED SPKDAT ERTFERN HILDA CRSTN TURBOSW 16 yesdiyo DS uonei891u WSN I 8 Fully Accessible Bus Slots The 786 AIO system board has 7 standard 16 bit slots and 1 standard 8 bit slots Two of the 16 bit slots has VESA standard 32 bit Local Bus expansion sockets These slots accept all AT and XT compatible expansion cards as well as VESA complient Local Bus expansion cards The 16 bit expansion slots consists of parallel rows of pins
17. hardwares such as plastic stand offs metal fasteners and screws are required to secure the board inside the case You should use the mounting hardwares which came with the case if possible to allow a better fit The locations to install the plastic stand off on the system board varies with the make and type of cases you use You should use as many stand offs as the case will allow to provide the system board 24 a good support in the case s chassis and to resist the downward force from the expansion cards Try out the stand off locations by aligning the system board with the chassis of the system case Most cases have several pre drilled screw holes for metal fasteners Identify the proper locations to install the metal fasteners onto the chassis Two metal fasteners should be sufficient Snap on the plastic stand offs on the system board from the bottom and gently lower the board inside the case Line up the stand offs with the notches on the chassis and slide the board into place Carefully line up the board on the chassis such that the threads of the metal fasteners are exposed inside the holes on the board Install the screws on the metal fasteners to complete the installation installing Power Connector The system board draws power from the power supply through its power connector Most expansion cards also draw power from the power supply indirectly through the AT expansion slots There are two power c
18. ize Data Cache Size Memory Size SRAM Tag Size 64KB 64KB 128 KB 128 KB 256 KB 256 KB 1 lt 16 MB gt 16 lt 32 MB lt 32 MB gt 32 lt 64 1 lt 32MB gt 32 lt 64 MB 8Kx8 8 8 16 4 8 8 8 16 4 32Kx8 32Kx8 16Kx4 Verify the jumper settings with Fig 3 to complete the installation 23 Chapter 3 Installation Guide Static Discharge Precautions Many components on the system board are sensitive to static electricity Special precautions must be taken when you handle the system board to prevent damage Discharge static electricity on your body by touching a grounded metal object or by wearing a grounded static wrist strap Handle the system board by the edges whenever possible Avoid touching the surface on the system board and put the system board in a static safe plastic bag before transportation f installing The System Board If your system board has not yet been installed follow the instructions below to insure proper installation Otherwise you may skip this chapter and proceed to the next The 786AI0 system board is designed to fit into many different types of cases Since it is not possible to cover all installation situations this chapter will illustrate the basic steps to install the board in most common cases 1 E The system board has many drilled mounting holes Some of which line up with the mounting holes in the case Mounting
19. omers are oriented in the same direction Line up the pins on the chip with the holes on the socket and press down firmly to complete the installation Fig 11 Intel 486 amp 386 CPU Memory Installation Available SIMM Configurations The 786 AIO system board supports two banks of SIMMs Memory configuration is very simple due to the automatic memory sizing and re map feature of the system board Up to 64 MB of SIMMs may be installed Different types 256 KB x 9 1 MB x 9 4 MB x 9 16 MB x 9 of SIMMs may be used for different banks but only one type of memory can be used in each bank Each memory bank can be disabled or ignored by setting the appropriate CMOS register C If the lowest memory bank bank 0 has SIMMs installed it will be the logically lowest memory bank However the system board automatically detects the logically lowest memory bank for memory re map without having the memory to be physically present on the lowest bank If the SIMMs on bank O are not present SIMMs located on C memory bank 1 will be re mapped to bank 0 the logically lowest bank A memory bank must be filled completely in order for the system board to work properly therefore the minimum memory size is MB Up to 17 memory configurations are possible Bank 0 Bank 1 Total Memory Size 256 KB None 1MB 256 0 1 1MB 256 256 1 2MB 1
20. onfiguration or you have lost the CMOS Setup due to battery drainage the system board via the BIOS setup program If you are settion up a new system board the BIOS Setup program is invoked automatically after Power On Self Test POST If an error is encountered during POST te system would notify the user in two ways If the display device i e video Adapter has not been in itialized a beep code is sent to the speaker Otherwise an error me ssage is displayed on the screen For non fatal errors you could byapss the setup program by pressing the lt FI gt key and allow to sy stem to boot up from the floppy drive or hard drive The enter the CMOS setup perform a system reset by one of the following methods a Turn off the power Wait 10 seconds Turn power back on b Press the Reset Switch on the case s front panel c Press Del keys simultaneously the follcwing message 15 displayed on the screen lt Del gt if you want to run SETUP Press Del key immediately to enter the CMOS SETUP program Follow the instructions displayed to move around the different setup screens Use the arrow keys to switch fields lt Page Up gt and 27 Page Down to scroll through possiblee parameters lt F12 and lt F3 gt to change the color the screen lt Etc to exit the setup screens Improper Use Caution A warning screen is displayed when you enter any of the setup screens Improper setp of CMOS
21. onnectors from the power supply to the system board They are distinguishable only by the color of wires which they are attached to Extreme care should be taken to ensure proper polarity Severe damage to the system board could occur if the position of the power connectors 1 incorrect A simple rule to install the power connectors Black colored ground wires should be in the middle of the connector Locate the power connectors on the system board and connect them to the power supply exactly as shown in Fig 4 25 Connecting the Keylock Reset amp Turbo Switches Several wired connectors can be found coming from the case s front panel They are usually for the Keylock Speaker Reset and Turbo switches and Turbo LED Locate the jumper pins on the system board for these switches and LED They are clearly marked on the system board near the CPU Connect all the switches as marked Fig 14 Installing Power Connector BLACK WIRES El 1113 A 26 Chapter 4 Using the BIOS Setup In this chapter we will explain the use of the BIOS setup program from American Megatrends Inc This setup program resides n the ROM BIOS and it is used to re cord system hardware settinge If the system board has already been installed and is functional you do not need to alter the settings in the CMOS Setup If you are setting up the system board for the first time changing systm hardware c
22. parameters could result in system malfunc or system hang Follow the instructions Warning Screen to restore CMOS values in case you run into problems with the setup program PE 10 2 BIOS Mon porum BIOS SETUP PROGRAM AMI BIOS SETUP UTIL ITIES C 2 Megatrends Inc All Rights Reserved STANDARD CMOS SETUP ADVANCED CMOS SETUP ADVANCED CHIPSET SETUP AUTO CNFIGURATION WITH BIOS DERAULTS ARTO CONFIGURATION WITH OPWER ON DEFAULTS CHANGE PASSWORD HARD DISK UTILITY WRITE TO CMOS AND EXIT DO NOT WRITE TO CMOS AND EXIT Standard CMOS Setup for Changing Time Date Hard Disk Type etc ESC Exit F2 F3 Color F10 Save amp Exit 28 SE E Stanard CMOS Setup Standard CMOS Setup records such information as date time hard drive types and etc As you enter the Standard CMOS Setup screen A small Help Window is displayed showing a description of the curr ent field and the acceptable field entries the calendar and memory size disp ayed on the right side of screen are automatic The first twr lines in this screen records the date and time Enter them according to the format suggested in the Help Window Daylight Savings adds one hour to the CMOS time when daylight sa ving begins and subtracts one hour when standard time returns Hard Disk C and Hard Disk D Type type of hard disks prsent for the first and second physical hard drives Forty seven types are possible
23. sword select the Change Password option from the first setup screen 32 Video ROM Shadow xxxx 16 1 this feature is enabled the video KOM starting at address xxxx is copied into memory Remap Unused Shadow memory Default is Disabled Fig 12 Advanced CMOS Setup Typematic Rate Programming Typematic Rate Delay msec Typematic Rate Chars Sec Above 1 MB Memory Test Memory Test Tick Sound Memory Parity Error Check Hit DEL Message Display Hard Disk Type 47 RAM Area Wait For F1 If Any Error System Boot Up Num Lock Weitek Processor Floppy Drive Seek At Boot System Boot Up Sequence System Boot Up CPU Speed Cache Memory Controller Internal Cache Memory Fast Gate A20 Option Turbo Switch Function ESC Exit XXXXX Ctr Pu Pd Modify F1 Hclp F2 F3 color 5 014 Values F6 BIOS Setup Defaults F7 Power0on Defaults Shadow RAM Option Remap Unused Shadow Memory Disabled Boot Sector Virus Protection Enabled Enabled Enabled 0 300 Enabled On Absent Disabled CLA High Enabled Enabled Enabled Enabled 33 Bus Frequency Select This feature is used only if the CPU is driven by its synchronous clock source CLKIN The actual bus clock frequency 15 CLKIN divided by a factor of 4 8 or 10 Select the proper speed according to the frequency of crystal used as CLKIN which is marked on the crystal next to the CPU socket The resulting bus clock freq
24. trends Inc All Rights Recerved Date mm date year Wed Dec 26 1991 Head Wpcom LZoneSec Size MB Time hour min sec 08 09 15 873 13 199 0 0 37 Hard disk type 47 USER TYPE Sun Tue Wed Thr Fri Sat Hard disk D type Not Installed 12348 Floppy drive 1 44 MB 3 1 2 Primary display VGA PGA EGA 8 9 1 n 12 Keyboard Installed Veni 1 90 1 1902 27 28 29 12 ESC Exit XXXXX F2 F3 Color PU PD Modify k b WN Advanced CMOS Setup Advanced CMOS Setup csreen contains a list of systom features Some of which are urilized to fine tune systim performance The de fault settings are listed in Figure 13 Typematic Rate Programming Control the rate at shich the system can accept input from the keyboard Default setting is Disabled Typematic Rte Delay time for keyboard input Options are 250ms 500ms 750ms and 100ms Default setting is 500ms 15 chars sec Above IMB Memory Test Default setting is Enabled Memory Parity Error Check Test for errors during memory read De fault is Enabled Hit lt Del gt Message Display Controls the screen prompt to access the setup program Default is lt Enabled Hard Disk Type 47 RAM Area Two options are available 0 300 and DOS 1 Option 0 300 places the hard disk type information at RAM address 0 300 while DOS 1KB places them in the top 1KB of
25. uency should not exceed 8 33M Hz CLKIN x Bus Clock Freq I O Cyle Delay Default is 250ns Available options are Ons 250ns 500ns 1000ns Refresh Methods Memory Refresh Methods Options are Normal and Hidden Choose Hidden for faster performance Diagnostic Bits OxxH Default setting is 0 Diagnostic Bits O3EH 7 6 Default setting is 1 Diagnostic O41H Default setting is 0 If a 20MHz486SX is used change this value to 16 Diagnostic bits O3DH These Bits are used to program the CPU speed in Non Turbo Mode The smaller the value the slower the CPU speed Default setting is OCH Advanced CMOS Setup Above 1 MB Memory Test Default Setting is Disable For 50MHz Cache read wait states is 1 Cache write wait states is 1 DRAM wait states is 2 BUS frequency select CLKIN 6 BIOS SETUP PROGRAM ADVANCED CHIPSET SETUP C 1990 American Megatrends Inc Rights Reserved Co Processor Wait States 0 w s 486 Internal Cache C000 Enabled Cache Read Wait States d w s Keyboard Frequency Select BUS CLK Cache Write Wait States 1 w s Bus Frequency Select CLKIN 8 DRAM Wait States 2 w s Cycle Delay 250 nS Non Cacheable Block 0 Size 0 KB Refresh Method Hidden Non Cacheable Block 0 512 Parity Checking Method Every Non Cacheable Block 1 Size 0 KB Diagnostic bits 03EH 7 6 0 Non Cacheable Block 1 512 KB Diagnostic bits 7 O 0 Cache FOOO Shadow 64 Disa
26. ues changed System reboots automatically Do Not Write To CMOS And Exit Abandon the BIOS Setup program and reboot system ae 38
27. under AMI BIOS With the last type being an User Definable Types If no drives are present choose Not Installed Drive type number 1 46 are pre defined types Please refer to Chapter 5 Technical Information AMI BIOS Hard Drive types for more infor mation Type 47 is a user definable type the following information are needed for each hard drive installed Clyn Number of cylinders Head Number of heads WPcom Write precom Lzone Landing zone of heads Size Capacity of drive datermined automatically Notice that if yor are using a SCSI hard drive the drive type should be not Installed If you are using an Intelligent IDE Controller or ESDI the drive type should be 1 Floppy Drive and Floppy Drive drives ans types Fire types are available 360KB 5 1 4 1 2 5 1 4 720KB 3 1 2 1 44MB 31 2 and Not Installed Primary Display Type of video display in the systim The options are Not Installed Monochrome for Hercules of MDA Color 40x25 VGA PGA EGA Color 80x25 Not Installed Keyboard The options are either Installed or Not Installed If Not Installed is chosen the system would not halt on keyboard errors After you have entered all the selections oredd lt Esc gt to return to previ ous screen and opoceed to Advanced CMOS setup Fig 11 Standard CMOS Setup BIOS SETUP PROGRAM STANDARD CMOS SETUP C 1990 American Mega
28. which match the connectors on the expansion cards There are two sections on the expansion slots one long and one short The long sections are fully functional 8 bit slots Both sections are used together to function as a 16 bit slot Local Bus slots are available on the two right most expansion slots These two slots could accomodate 8 bit 16 bit or VESA Local Bus 32 bit expansion cards Local Bus expansion cards bypass the slower ISA Bus and communicate with the CPU Bus directly at the maximum bandwidth of 66MHz with 486 DX 2 66MHz processor Since the memory banks are located on the right side of the expansion slots full length expansion cards can be used in all 8 slots without obstruction by the DRAM SIMMs Component Layout OPTIONAL T BATT LASTIC a EL i SIMM SOCKETS JMP8 2 B t 1 TL CACHE JMP6 1 3833 Me JMP10 99 za ss es se 8588 888 8888 E TURBO SW RESET SPEAKER JMP5 CACHE TURBO LED KEYLOCK JMP2 JMP4 CONFIGURATION JUMPER BLOCK Fig 2 System Board Component Layout YU YeR 00206 Chapter 2 Hardware Configuration Static Discharge Precautions Many components on the system board are sensitive to static electricity Special precautions must be taken when you handle the system board to prevent damage Discharge the static electricity on your body by tou

VESA LOCAL BUS

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