&KDSWHU System Board This high-performance, 32-bit personal computer system is based on the 486 series microprocessor. It features the single-chip upgrade technology which allows maximum ease and flexibility for upgrading the system. It is fully compatible with the IBM PC/AT and is suitable for use as a Windows workstation, CAD/CAE/CAM workstation, UNIX personal workstation or desktop PC.
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1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. Keyboard controller M5105 super I/O controller System and VGA BIOS RTC Battery Power connector IDE fixed disk connector #2* IDE fixed disk connector #1 Diskette drive connector ISA riser card connector Local bus IDE controller* M1431 system chip Second-level cache* Power daughter board connectors TAG RAM Fan power connector 486 CPU socket Figure 1-1 * 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31.
1.2 ESD Precautions Electrostatic discharge (ESD) can damage your processor, disk drives, expansion boards, and other components. Always observe the following precautions before you install a system component. 1. Do not remove a component from its protective packaging until you are ready to install it. 2. Wear a wrist grounding strap and attach it to a metal part of the system unit before handling components.
Do not attempt the procedures described in the following sections unless you are a qualified service technician. 1.4 Jumper Settings Figure 1-2 shows the jumper locations.
The following tables list the jumper settings and their correponding functions.
Table 1-3 CPU Type Selection 4861 486 WB2 Pentium OverDrive AMD 486/DX2 AMD 486/DX4 Cyrix IBM TI JP11 1-2 1-2 1-2 1-2 1-2 2-3 2-3 JP12 1-2 2-3 2-3 1-2 1-2 1-2 2-3 JP13 1-2 1-2 1-2 1-2 1-2 1-2 2-3 JP18 2-3 1-2 1-2 2-3 2-3 2-3 2-3 JP20 2-3 2-3 2-3 2-3 2-3 1-2 2-3 Open Open Open Open Open Closed Open JP30-32 JP33 1-2 1-2 1-2 1-2 1-2 2-3 1-2 JP34-36 Closed Closed Closed Open Open Open Open JP39 1-2, 4-5 1-2, 4-5 1-2, 4-5 1-2, 4-5 1-2, 4
1.5 Installing Memory The system board has two 72-pin SIMM sockets that accept 1-MB, 2MB, 4-MB, 8-MB, or 16-MB memory modules with 80 ns (or less) DRAM speed. The maximum system memory size is 36 MB. When installing additional memory, choose one of the SIMM configurations listed in Table 1-5.
1.5.1 Installing a SIMM Observe ESD precautions when installing SIMMs. See section 1.2. Follow these steps to install a SIMM: 1. Insert the SIMM into the socket at a slight angle, making sure that the cut edge of the SIMM touches the base of the circle mark on the SIMM socket. 2. Gently press the SIMM back against the holding clips on both ends of the socket until the peg slips into the holes on the SIMM, and the holding clips lock the SIMM into position. See Figure 1-3. 3.
1.5.2 Removing a SIMM Observe ESD precautions when removing SIMMs. See section 1.2. 1. Press the holding clips on both sides of the SIMM outward to release it. 2. Push the SIMM upward. 3. Gently pull the SIMM out of the socket. Figure 1-4 1.5.3 Removing a SIMM Reconfiguring the System The system automatically detects the amount of memory installed. Run Setup to view the new value for total system memory and make a note of it.
1.6 Upgrading the CPU Conventional technology places the CPU on the same board as the ISA bus logic, system memory and I/O interface. The entire system board must be replaced to upgrade the CPU. Single-chip upgrade technology gives you the flexibility to upgrade the CPU by simply inserting a new CPU without replacing the entire system board. 1.6.1 Unpacking the Upgrade CPU Unpack all items and inspect the contents. If any of the following items are damaged or missing, contact your dealer immediately.
4. Insert the upgrade CPU (with the heatsink) into the upgrade socket. Make sure that pin 1 of the CPU corresponds to hole 1 of the upgrade socket (see Figure 1-6). The flat corner on the CPU indicates pin 1. Insert the CPU pins into the socket pinholes gently but firmly. Be careful not to bend any pins. Pin 1 Indicator Pin 1 Indicator (flat corner) Figure 1-5 Pin 1 Indicator on the Upgrade CPUand Socket Figure 1-6 Installing an Upgrade CPU 5. 1-12 Set the required jumpers on the system board.
1.7 Power Daughter Board The power daughter board enables the system to support a 3.3V microprocessor. Without this board, your system can only support a 5V CPU. Follow these steps to install the power daughter board: Before installing, you must check first the voltage requirement of your upgrade CPU. 1. Locate the power daughter board connectors marked as JP44 and JP45 on the system board. See Figure 1-1. 2. If your system board comes with a 5V CPU, then you will find JP45 closed.
1.8 Upgrading VGA Memory Observe ESD precautions when installing components. See section 1.2. The VGA memory is upgradable to 1 or 2 MB depending on your onboard VGA chip. The system board may come with either a GD5424 or a GD-5429 VGA chip. If your board has a GD-5424, then your VGA memory is expandable to 1 MB only. If your system board has a GD-5429 VGA chip, then you can further expand your VGA memory to 2 MB.
U9 U10 514260 DRAM Figure 1-7 44256 DRAM U12 U13 U15 U16 Installing VGA RAM You do not need to change any jumper settings when upgrading the VGA memory.
1.9 Upgrading Cache Memory To install cache chips, do the following: 1. Locate the cache sockets on the system board. See Figure 1-1. 2. Align the cut edge of the chip with the cut edge of the cache sockets. See Figure 1-8. TAG Figure 1-8 3. U56 U57 U58 U59 U60 U61 U62 U63 Installing Cache Gently but firmly insert a 32 Kb x 8, 15 ns SRAM chip into each of the sockets. Be careful not to bend any pins. Table 1-6 lists the cache size options and the corresponding chip configuration.
The SRAM must have an access speed of 15 nanoseconds. Make sure that you set the jumpers properly. See section 1.4. 1.10 Post-installation Instructions Always observe the following: 1. See to it that the components are installed according to the stepby-step instructions in their respective sections. 2. Make sure you have set all the required jumpers before you proceed. See section 1.4 for the correct jumper settings. 3. Replace any expansion boards or peripherals that you removed earlier. 4.
1.11 Power-Management Feature The mainboard incorporates the latest power-conservation technology. However, to take advantage of its energy-saving capabilities, the mainboard must have an Intel SL-Enhanced or a power-saving CPU. The Power-Management feature allows you to monitor system activity. System activity refers to any action involving one or more of the following devices: keyboard, mouse, diskette drives, fixed disk drives, connected peripherals, or video memory.
Set the independent power-management timers for the VESA DPMS monitor. Valid values are from 1 to 15 minutes. Any video or I/O action returns the system to full power. IDE FIXED DISK STANDBY MODE The IDE Fixed Disk Standby Mode offers a quick-resume powersaving mode for ATA-compliant IDE fixed disks. It is allows temporary power saving during operation. Set the independent power-management timers for the fixed disk. Valid values are from 1 to 15 minutes. In this mode, the fixed disk spin motor is shut off.
Set the Suspend Mode timer to a value from 2 to 120 minutes, or activate the Suspend/Resume button. In Suspend mode, the turbo LED light on the front panel blinks at a rate slower than when the system is in the Standby mode. Activating the Suspend/Resume button produces two beeps as the system enters the suspend mode. Any keyboard/mouse or I/O action resumes full power.
1.12 Advanced Power Management (APM) This system features the APM standard designed to further reduce system power consumption. APM is a power-management approach developed jointly by Microsoft and Intel. An increasing number of software applications support APM to take advantage of the powersaving features and offer greater system availability without affecting performance.
1.14 VESA DPMS The Video Electronics Standard Association (VESA) proposed the Display Power-Management Signaling (DPMS) standard combinations of horizontal and vertical synchronization signals for the PC-VGA monitor. Its purpose is to comply with the U.S. Environmental Protection Agency (EPA) requirements. Table 1-8 lists the different VESA DPMS modes and their functions.
1.15 Error Messages In the event that you receive an error message, do not continue using the computer. Note the message and take corrective action at once. This section describes the different types of error messages and suggests corrective measures. There are two general types of error messages: • • Software System 1.15.1 Software Error Messages Software error messages are returned by your operating system or application.
Table 1-9 System Error Messages Error Message Bad CMOS Battery 1-24 Corrective Action Replace battery. Contact your dealer. CMOS Checksum Error Run Setup. Diskette Drive Controller Error Check and connect the cable to the diskette drive or controller. Diskette Drive Error Diskette may be bad. If not, check the diskette drive and replace if necessary. DRAM Configuration Error Check and modify DRAM configuration to agree with Table 1-5. Equipment Configuration Error Run Setup.
Table 1-9 System Error Messages (continued) Error Message Corrective Action Memory Error Check SIMMs on the system board. Contact your dealer. Memory Size Mismatch Run Setup. Serial 1 Conflict Run Setup. Disable onboard serial 1. Serial 2 Conflict Run Setup. Disable onboard serial 2. Parallel Conflict Run Setup. Disable onboard parallel port. Pointing Device Error Check and connect the pointing device. Contact your dealer. Pointing Device Interface Error Contact your dealer.
1.15.3 Correcting Error Conditions As a general rule, the "Press F1 to continue" error message is caused by a configuration problem which can be easily corrected. An equipment malfunction is more likely to cause a fatal error, i.e., an error that causes complete system failure. Here are some corrective measures for error conditions: 1. Run Setup.
