Chapter 2. System Board Features
Small Computer System Interface (SCSI) Controller
Your computer has an integrated Adaptec AIC-7895 Ultra-SCSI controller that provides an interface
through which the computer can communicate with SCSI-compatible devices, such as hard disk drives,
CD-ROM drives, tape drives, read-and-write optical drives, scanners, and printers.
SCSI connections are provided by the following:
Channel A, 68-pin internal connector on the system board
Channel B, 68-pin internal connector with a cable to an external connector at the rear of the chassis
Channel B, 50-pin internal connector
The Adaptec AIC-7895 Ultra-SCSI controller also supports the Adaptec RAIDport connection to expansion
slot 2 using the optional Adaptec ARO-1130 PCI RAIDport adapter. RAID (Redundant Array of
Independent Disks) is a collection of disk drives that collectively act as a single storage system that
provides enhanced performance and can tolerate the failure of a drive without losing data. With this
option, your computer supports RAID modes (levels) 0 and 1 only.
For information about connecting SCSI devices, refer to the SCSI documentation on the
Ready-to-Configure Utility Program CD. Also refer to Installing Options in Your IntelliStation M Pro.
System Management Controller
The system board contains a National System Management chip (LM78) that monitors the computer at all
times looking for potential hardware failures. The LM78 is programmed with predetermined threshold
values for the following:
System temperature
Fan speed
Power supply voltages (
+
5,
+
12,
−
12,
+
3.3, Vcore)
Intrusion detect for security (detects when chassis lid has been removed, even if power is off)
During system operation, Desktop Management Interface (DMI) code polls the LM78 chip and generates
an alert if the measured value is outside of the programmed minimum and maximum range. The alert can
be provided to a network administrator across a LAN.
Note: DMI is software used to gather information about the hardware and software in a computer. It
allows network administrators to remotely monitor and control the computer. DMI can be used to
remotely track many types of information about networked PCs. This information can be accessed
using a DMI browser. DMI browsers are provided by all major operating system and all major LAN
management packages.
The following table shows the typical system resource assignments for the system management controller.
Table 9 (Page 1 of 2). System Resource Assignments for the System Management Controller
Resource
Resource Assignment
ROM
None
RAM
None
I/O Address (Hex)
0290, 0295, 0296
IRQ
None
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Technical Information Manual
