Chapter 2. System Board Features
When the computer is started, the resource assignments are subject to change during POST.
Ethernet
The system board contains an Intel 82557 10/100 Mbit Ethernet controller that provides a
high-performance network connection. The Ethernet controller, which is a Plug and Play device and a PCI
2.1 Bus Master, features the following:
IEEE 802.3 compliance, 10 and 100 Mbps
Support for 100BaseTx and 10BaseT with PCI bus interface
Viewable media access control (MAC) address
Single RJ-45 port
3 Kbyte transmit FIFO and 3 Kbyte receive FIFO
Auto-negotiation
Full duplex capability
Full NOS support
The Ethernet controller interfaces directly with the Intel 82555 physical layer on the system board, which
contains all of the analog transmit and receive circuits.
The system board also includes a discrete Wake on LAN controller (MagPack). This controller can be
disabled in the Configuration/Setup Utility program.
A switch is provided on the system board for disconnecting the Ethernet subsystem from AUX5 power.
This disconnection is required if a Wake on LAN adapter is installed. (The power supply does not provide
enough AUX5 current to power both the system board Ethernet and a Wake on LAN adapter
simultaneously.)
Note: For compliance with FCC Class A radiation limits, all Ethernet cabling attached to IntelliStation M
Pro computers must be Class 5, regardless of the speed (10 Mbit or 100 Mbit).
The following table shows the system resource assignments for the Ethernet controller.
When the computer is started, the resource assignments are subject to change during POST.
Table 7 (Page 2 of 2). System Resource Assignments for the Audio Controller
Resource Resource Assignment
DMA Required
3
Table 8. System Resource Assignments for the Ethernet Controller
Resource Resource Assignment
ROM None
RAM None
I/O Address (Hex) Required
4
IRQ Required
4
DMA None
4
Assigned by Plug and Play BIOS or operating system.
16 Technical Information Manual
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