Acer ALTOS 9100 User Manual
& K D S W H U
System Board
1.1Features
The M9N is a dual-processor system board that supports the Intel Pentium II CPU. It contains an exclusive connector for the CPU board that carries two slots for the Pentium II CPU modules.
This high-performance 64-bit system board utilizes both the ISA and the PCI local bus architecture. Two ISA and five PCI bus slots reside on the board to allow installation of either master or slave devices.
A 50-pin Fast SCSI-II interface and two 68-pin Wide SCSI interfaces come with the system board to connect SCSI devices. External I/O interfaces include a parallel port and a video port, RJ-45 and USB connectors, and keyboard and mouse ports.
The system board supports two optional features, the ASM Pro and the remote diagnostic management (RDM), that allow better server management. The ASM Pro detects problems in CPU thermal condition, CPU working voltage detection (±12V/±5V/3.3V/1.5V), and PCI bus utilization calculation. It also detects if the CPU fan or the chassis fan malfunctions. The RDM allows execution of the RDM diagnostic program from a remote RDM station to fix detected problems or to reboot the system.
System Board |
1-1 |
1.2Major Components
The system board has the following major components:
∙CPU board slot
∙Two ISA and five PCI bus slots (one PCI slot may include an optional RAID port)
∙256-KB Flash ROM for system BIOS
∙System clock/calendar with battery backup
∙50-pin Fast SCSI-II and two 68-pin Wide SCSI interfaces
∙Two 24-pin RDM interfaces
∙IDE hard disk and diskette drive interfaces
∙Onboard VRAM and VRAM sockets for video memory upgrade
∙Power connector for both standard 420-watt SPS and redundant 420-watt SPS
∙Super I/O, SCSI, VGA, memory, and Advanced Server Management (ASM) controller chipsets
∙External ports:
∙PS/2-compatible keyboard port (optional AT-keyboard port)
∙PS/2-compatible mouse port
∙Parallel port
∙Video port
∙RJ-45 connector
∙Universal Serial Bus (USB) connector
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User’s Guide |
1.3Layout
Figure 1-1 shows the system board components.
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1 |
Keyboard port |
12 |
Wide SCSI connector 2 |
2 |
Mouse port |
13 |
Wide SCSI connector 1 |
3 |
Parallel port |
14 |
Narrow SCSI connector |
4 |
Video port |
15 |
Diskette drive connector |
5 |
RJ-45 connector |
16 |
EIDE connector |
6 |
USB connector |
17 |
Battery |
7 |
CPU board slot |
18 |
RDM connectors |
8 |
PCI slots |
19 |
Power connectors |
9 |
ISA slots |
20 |
Video RAM |
10 |
Flash ROM BIOS |
21 |
Power connector |
11 |
RAID port (optional) |
22 |
Video RAM upgrade sockets |
Figure 1-1 System Board Layout
System Board |
1-3 |
1.4Jumpers and Connectors
1.4.1Jumper 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 represents pin 1.
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User’s Guide |
1.4.2Jumper Settings
Table 1-1 lists the system board jumpers with their corresponding settings and functions.
Table 1-1 |
System Board Jumper Settings |
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Jumper |
Setting |
Function |
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Software Shutdown |
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Control for CN4 |
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JP1 |
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1-2 |
Enabled |
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2-3* |
Disabled |
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BIOS Type |
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JP2 |
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1-2 |
Branded |
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2-3* |
Generic |
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Password Security |
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JP3 |
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1-2 |
Check password |
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2-3* |
Bypass password |
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SCSI Channel 1 |
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High-Byte Termination |
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JP4 |
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1-2* |
Terminator always set to ON |
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2-3 |
SCSI terminator set to ON or OFF |
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by software |
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Open |
Terminator set to OFF |
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VGA Feature |
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JP5 |
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1-2* |
Normal (Auto) |
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2-3 |
Onboard VGA always disabled |
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*Default setting
System Board |
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