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Chapter 8—USB and IEEE-1394 Ports and Devices
SERIES “A”
USB Connector
SERIES “B”
USB Connector
Figure 8.2 USB Series A and Series B plugs and receptacles.
Typical USB Port Locations
SERIES “A”
USB Socket
SERIES “B”
USB Socket
The location of USB ports varies with the system. On late-model
desktop and tower computers using baby-AT motherboards, you
might find one or two USB ports on a card bracket in the rear of
the computer. The ports might be mounted on an add-on card or
cabled out from motherboard ports.
Most systems using ATX, NTX, or similar motherboards—as well as
late-model LPX-based systems—will have one or two USB ports on
the rear of the case next to other ports.
Some consumer-oriented, late-model systems have one USB port on
the front, sometimes located next to a 9-pin serial port. These ports
are located in the front of the computer for easier connection of
digital cameras and card readers for digital image downloading.
Adding USB Ports to Your Computer
If your computer doesn’t have USB ports onboard, use one of the
following options to add them:
• Purchase USB header cables to extend motherboard USB
cable connectors to the outside of the case.
• Purchase and install a USB host adapter card.