Acer ALTOS 9100 User Manual

& K DSWHU

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System Board

1.1 Features

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-perform ance 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 W ide 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

1.2 Major 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

•

1-2 User’s Guide

1.3 Layout

3

5

278

9

918

2

4

6

0

Figure 1-1 shows the system board components.

17

1

2

21

2

1

16

15

14

13

12

11

10

1 Keyboard port
2 Mouse port
3 Parallel port
4 Video port
5 RJ-45 connector
6 USB connector
7 CPU board slot
8 PCI slots
9 ISA slots
10 Flash ROM BIOS
11 RAID port (optional)

12 Wide SCSI connector 2
13 Wide SCSI connector 1
14 Narrow SCSI connector
15 Diskette drive connector
16 EIDE connector
17 Battery
18 RDM connectors
19 Power connectors
20 Video RAM
21 Power connector
22 Video RAM upgrade sockets

Figure 1-1 System Board Layout

System Board 1-3

1.4 Jumpers and Connectors

1.4.1 Jumper and Connector Locations

Figure 1-2 shows the jumper and connector locations on the s ystem
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.

1-4 User’s Guide

1.4.2 Jumper Settings

Table 1-1 lists the system board jumpers with their corresponding
settings and functions.

Table 1-1 System Board Jumper Settings

Jumper Setting Function

Software Shutdown
Control for CN4

JP1 1-2

BIOS Type

JP2 1-2

Password Security

JP3 1-2

SCSI Channel 1
High-Byte Termination

JP4 1-2*

VGA Feature

JP5 1-2*

*

2-3

2-3*

2-3*

2-3
Open

2-3

Enabled
Disabled

Branded
Generic

Check password
Bypass password

Terminator always set to ON
SCSI terminator set to ON or OFF
by software
Terminator set to OFF

Normal (Auto)
Onboard VGA always disabled

*

Default setting

System Board 1-5