Silicon Graphics Origin200, Owner'S Manual

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Chapter 1: Overview of the Origin200 System
Module System Controller (MSC)
The module system controller (MSC), located behind the front power switch and status
LED, performs the following functions:
• holds the system serial number on a device called the number in a can (NIC)
• provides power on, power off, reset, and other low-level functions
• displays system status information using a tricolor LED
Power-on, power-off, reset, and nonmaskable interrupts are performed by pressing
buttons on the front panel. You can also perform these and other functions by issuing
commands to the MSC via a terminal or modem connected to the AUX port at the rear of
the system.
See “Front Panel Functions: Status LED, Power, Reset, NMI” in Chapter 4 for a
description of the front panel.
See “Using the AUX Port and Module System Controller Commands” in Chapter 4 for a
description of the commands that the MSC can accept.
PCI Backplane and Expansion Slots
There are three expansion slots available for peripheral component interconnect (PCI)
bus cards. The slots provide PCI IDs 5, 6, and 7. See Figure 1-6.
Boards can be full-size, 32-bit or 64-bit. In addition to providing 5V, the PCI backplane
also accommodates 3.3V PCI cards with a total of up to 30 watts of 3.3V power.
Figure 1-6 shows the location and slot numbers of the PCI backplane.