IBM eServer 370 xSeries User Reference Manual page 28

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11 Universal Serial Bus connectors: You can attach I/O devices to these two
12 Power supply connectors: The three system power cords connect here.
13 PCI expansion slots: Your server has twelve 64-bit, PCI expansion slots.
14 Keyboard port connector: The keyboard cable connects here.
15 Mouse port connector: The mouse cable connects here. This port
Note: For pin assignments and other details about these connectors, see
12
xSeries 370 User's Reference
Serial port B connector: Serial signal cables for modems and other serial
devices connect here to the 9-pin serial port B connector. See "Devices and
I/O ports" on page 23 for port assignment information. If you are using a
25-pin signal cable, you need a 9-pin-to-25-pin adapter cable.
Advanced System Management PCI adapter dual serial port connector:
This connector can be used to attach to a Y-cable that is shipped with your
server. This Y-cable can be used to attach to a modem that is dedicated to
communication with the Advanced System Management PCI adapter.
Advanced System Management Interconnect port connector: This
connector is used to attach other compatible service processors for remote
access.
Advanced System Management external power connector: This
connector is not used.
Parallel port connector: A signal cable for a parallel device, such as a
printer connects here.
Video port connector: The monitor signal cable connects here.
Universal Serial Bus (USB) connectors. You need a 4-pin cable to connect
devices to USB 1 or 2. A hot-plug keyboard-and-mouse option can be cabled
or uncabled from the USB connectors without error or loss of service. Review
your operating-system documentation to determine whether your operating
system supports USB devices.
Note: If a standard (non-USB) keyboard is attached to the keyboard port, the
USB ports are disabled while the power-on self-test (POST) is
running, and no USB devices will work during POST.
All PCI slots support hot-plug PCI adapters.
Your server has assigned PCI slots 10, 11, and 12 as PCI priority slots. The
system BIOS scans the PCI priority slots for startable (bootable) devices
before scanning the I/O function card.
Note: If you install additional storage adapters and external hard disk drives,
and you do not want to change the startup hard disk drive, you must
install the adapters in PCI slots 1 through 9.
sometimes is called an auxiliary-device or pointing-device port.
"Connecting external options" on page 94.