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System Board
1.1
Features
The M21A is a dual-processor system board built on an extended ATX
baseboard utilizing two Intel Pentium II Xeon processors running at
400/100 and 450/100 MHz. It is integrated with the Intel 440GX system
controller, which consists of the PCI/AGP controller and the PCI/ISA
IDE accelerator (PIIX4E).
The Pentium II Xeon processor like its predecessor, the Pentium Pro
and Pentium II processor, implements a Dynamic Execution micro-
architecture - a unique combination of multiple branch prediction, data
flow analysis, and speculative execution. This means that the Pentium
II Xeon can deliver higher performance than the Pentium processor
while maintaining binary compatibility with
all
previous
Intel
Architecture processors.
Also, the Pentium II Xeon processor is available in 512K, 1MB, and
2MB L2 cache options with the introduction of the Slot 2 socket.
Unlike Slot 1 Pentium IIs, which access the L2 at half the processor
speed, the Slot 2 access the L2 at full processor clock speed.
The PCI/AGP controller host bus interface supports a Pentium II Xeon
processor with 100 MHz bus frequency.
It also provides a 72-bit
DIMM that supports synchronous DRAM (SDRAM) DIMMs. The
PCI/AGP controller introduces a new technology, which is the
Accelerated Graphics Port (AGP) interface.
Supporting up to
533MB/sec MHz data transfer rate, the AGP interface boosts graphics
performance.
System Board
1-1
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Table of Contents
Related Manuals for Acer 12000
Summary of Contents for Acer 12000
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Page 1: System Board
System Board Features The M21A is a dual-processor system board built on an extended ATX baseboard utilizing two Intel Pentium II Xeon processors running at 400/100 and 450/100 MHz. It is integrated with the Intel 440GX system controller, which consists of the PCI/AGP controller and the PCI/ISA IDE accelerator (PIIX4E). - Page 2 The PIIX4E is a multifunctional PCI device controller implementing system functions including PCI IDE, universal serial bus (USB) host/hub, and enhanced power management. It also supports Ultra DMA/33 synchronous DMA-compatible devices. The four DIMM sockets on board allow memory upgrade to a maximum of 2048 MB and supports 72-bit DIMM using synchronous DRAM (SDRAM) DIMMs.
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Page 3: Major Components
Major Components The system board has the following major components: Supports dual Intel Pentium II Xeon processors running at 400 or 450 MHz with integrated 512K, 1MB or 2MB L2 write-back cache Four DIMM sockets that accept 16-, 32-, 64- 128-, 256 and 512MB DIMMs with a maximum of 2048 MB system memory One ISA, six PCI, and one AGP bus slots (one PCI and ISA shared slot) - Page 4 Layout Figure 1-1 shows the system board components. Mouse port Keyboard port Serial port 1 Parallel port Serial port 2 USB connector RJ-45 LAN controller AGP slot PCI slots ISA slots Intel 82371EB PIIX4E (PCI- ISA bridge) DEC 21152 (PCI-PCI bridge) Buzzer SCSI controller Battery...
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Page 5: Jumper And Connector Locations
Jumpers and Connectors 1.4.1 Jumper and Connector Locations Figure 1-2 shows the jumper and connector locations on the system board. Figure 1-2 System Board Jumper and Connector Locations Jumpers are prefixed “JP”. Connectors are prefixed “CN”. The blackened pin of a jumper or connector represents pin 1. -
Page 6: Jumper Settings
Password Security 2-3* Boot Block Mode 1-2* Sound Output 1-2* AlertPack Select 1-2/4-5 2-3/5-6* SCSI CH. B Terminator JP11 1-2* * Default Function Acer Check password Bypass password Disabled Enabled Buzzer Speaker AlertPack and LM80 LM80 Only Enabled Disabled User’s Guide... -
Page 7: Connector Functions
1.4.3 Connector Functions Table 1-2 lists the different connectors on the system board and their respective functions. Table 1-2 Connector Functions Connector Cabinet Fan Connector Mouse and Keyboard Ports 280W Power Supply Connector-1 280W Power Supply Connector-2 ATX Power Connector 280W Power Supply Connector-3 Modem Card Ring-in Connector CN10... - Page 8 Table 1-2 Connector Functions Connector CN32 SCSI Channel A Wide Connector CN33 SCSI Channel A Narrow Connector CN34 RDM LED Connector CN35 External Speaker Connector CN36 Hard Disk LED Connector CN37 Hard Disk LED Connector CN38 Power Switch Connector CN39/47 RDM/ASM Module Connector CN40 Wake-on-LAN (WOL) Connector...
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Page 9: Esd Precautions
ESD Precautions Always observe following precautions before installing a system component: Do not remove a component from its antistatic packaging until you are ready to install it. Wear a wrist grounding strap before handling electronic components. Wrist grounding straps are available at most electronic component stores. -
Page 10: Installing The Retention Mechanism
Installing and Removing the Pentium II Xeon Processor Intel’s Pentium II Xeon CPU is a Slot 2 processor that uses uses a 330-pin single edge connector which is a bit longer that a Slot 1 processor. Other than the size the major improvement of the Slot 2 processor is at the L2 cache. - Page 11 3. Align the metal brace beneath the system board along the Slot 2 retention holes and secure the retention mechanism with six screws (see figure below). Install the last two screws when fitting the system board to the housing. External Ports Figure 1-4 Installing the Retention Mechanism System Board...
- Page 12 1.6.2 Installing an Intel Pentium II Xeon processor Follow these steps to install a Pentium II Xeon processor: 1. Attach the fansink module to the Pentium II Xeon processor and secure it with four screws. Figure 1-5 Installing the Fansink 2.
- Page 13 2. Carefully press down the Pentium II Xeon processor until it is properly inserted into the socket. 3. Use the retention mechanism cover to secure the processor by pressing it down until it locks with the retention mechanism as shown below. Figure 1-7 Installing Retention Mechanism Cover The retention mechanism cover only fits one way.
- Page 14 1. Unclip the retention mechanism cover. Figure 1-8 Removing the Retention Mechanism Cover 2. Flip up both the plastic ear of the Pentium II Xeon processor. This procedure detaches the processor from the socket. Figure 1-9 Removing the Pentium II Xeon Processor 1-14 User’s Guide...
- Page 15 3. Carefully lift up and remove the Pentium II Xeon processor. 1.6.4 Installing and Removing the Terminator Board When you are not using all the Slot 2 sockets, you must install a terminator board into each empty slot. To install the terminator board: Position the terminator board over the empty slot.
- Page 16 The retention mechanism cover only fits one way. Both shafts of the retention mechanism and the retention mechanism cover have a o and a oo indicator. Match the O on the cover with the O on the retention mechanism first, then hooked them together and then insert the OO side to the retention mechanism and make sure they are clipped.
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Page 17: Memory Upgrade
Memory Upgrade The four 168-pin sockets onboard support SDRAM-type DIMMs. You may install 16-MB, 32-MB, 64-MB, 128-, 256-, or 512-MB (single and double density) DIMMs for a maximum of 2048-MB system memory. The SDRAM DIMMs should work under 3.3 volts only; 5 volt memory devices are not supported. -
Page 18: Installing A Dimm
Table 1-3 Memory Configurations DIMM1 DIMM2 DIMM3 128 MB 128 MB 128 MB 128 MB 128 MB 128 MB 128 MB 128 MB 128 MB 256 MB 256 MB 256 MB 256 MB 256 MB 256 MB 256 MB 256 MB 256 MB 512 MB 512 MB... -
Page 19: Removing A Dimm
Figure 1-11 Installing a DIMM 1.8.3 Removing a DIMM To remove a DIMM, press the holding clips on both sides of the socket outward to release the DIMM. Place your forefingers on the top of the DIMM before you press the holding clips to gently disengage the DIMM from the socket. -
Page 20: Reconfiguring The System
1.8.4 Reconfiguring the System Reconfigure the system after installing or removing DIMMs. Follow these steps to reconfigure the system: Reboot the system. A memory error message appears, indicating that the total memory does not match the value stored in CMOS. Press Press twice to exit Setup and reboot the system. -
Page 21: Installing Expansion Cards
Installing Expansion Cards 1.9.1 Installing PCI Cards To install PCI cards: Locate the PCI slots on the system board. Remove the bracket on the housing opposite an empty PCI slot. Insert a PCI card into the slot. Make sure that the card is properly seated. - Page 22 Follow these steps when installing ISA cards: Remove all PnP cards installed in the system, if any. Install non-PnP ISA cards. Turn on the system. Use the operating system or ICU to manually assign the appropriate IRQs to the cards. This ensures that BIOS will not use the resources assigned to the non-PnP ISA cards.
- Page 23 1.9.3 Installing AGP Card When installing an AGP card, make sure that the IRQ required by the card is not already assigned to a PCI or ISA device to avoid resource conflicts. Follow these steps when installing an AGP card: 1.
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Page 24: Asm Pro
1.10 ASM Pro ASM Pro is a server management tool based on the Simple Network Management Protocol (SNMP). It detects server problems related to the CPU thermal condition, 5V/3.3V/1.5V detection, or PCI bus utilization calculation. This feature is designed primarily for server supervisors and management information system (MIS) personnel to help them detect errors or potential trouble spots in their network servers through a single management station. -
Page 25: Remote Diagnostic Management
1.11 Remote Diagnostic Management Remote Diagnostic Management (RDM) is a network management tool that utilizes modems and telephone lines to control a host of servers from a remote station. It monitors and analyzes the server condition, updates the BIOS settings if necessary, or reboots the server in the event of failure and quickly returns it to normal operation. -
Page 26: Software Error Messages
1.12 Error Messages Do not continue using the computer if you receive an error message of any type. Note the message and take corrective action. This section explains the different types of error messages and corresponding corrective measures. There are two general types of error messages: Software System 1.12.1... - Page 27 Table 1-4 System Error Messages Message Diskette Drive Controller Error or Not Installed Floppy Disk Controller Error Diskette Drive Error Diskette Drive A Type Mismatch Floppy Drive A Error Diskette Drive B Type Mismatch Floppy Drive B Error ECC Facility Fail Equipment Configuration Error Expansion ROM Allocation Failed...
- Page 28 Table 1-4 System Error Messages Message I/O Parity Error I/O Resource Conflict(s) I2C Interface or Device(s) Error, System Halt PS/2 Keyboard Error or No Keyboard Not Connected PS/2 Keyboard Interface Error PS/2 Pointing Device Error PS/2 Pointing Device Interface Error Memory Error at: MMMM:SSSS:OOO (W:XXXX, R:YYYY)
- Page 29 Table 1-4 System Error Messages Message Onboard Pointing Device Interface Error Press F1 key to continue or Ctrl-Alt-Esc for Setup Real Time Clock Error RAM Parity Error 64K System Management Memory Bad SMRAM Not Exist Press Esc to turn off NMI, any key to reboot System Board Action...
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Page 30: Correcting Error Conditions
1.12.3 Correcting Error Conditions As a general rule, if an error message says "Press F1 to continue," it 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.