Setup and Operation: Dell OptiPlex GX1 Small-Form-Factor System User's Guide
file:///C|/infodev/2013/eDoc/OpGX1/UG/setup.htm[2/21/2013 11:47:10 AM]
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Serial port 1 connector
When you connect external devices to your computer's back panel, follow these guidelines:
Check the documentation that accompanied the device for specific installation and configuration
instructions.
For example, you must connect most devices to a particular input/output (I/O) port or connector to
operate properly. Also, external devices like a mouse or printer usually require you to load device
drivers into system memory before they will work.
Always attach external devices
while your computer is turned off.
Then turn on the computer
before
turning on any external devices, unless the documentation for the device specifies otherwise. (If the
computer does not seem to recognize the device, try turning on the device before turning on the
computer.)
NOTICE: When you disconnect external devices from the back of the computer, wait 5
seconds after turning off the computer before you disconnect any devices to avoid
possible damage to the system board.
Parallel Port Connector
The integrated parallel port uses a 25-pin D-subminiature connector on the computer's back panel.
This I/O port sends data in parallel format (where eight data bits, or one byte, are sent simultaneously over
eight separate lines in a single cable). The parallel port is used primarily for printers.
The default designation of your computer's integrated parallel port is LPT1. Port designations are used, for
example, in software installation procedures to identify the port to which your printer is attached, thus telling
your software where to send its output. (An incorrect designation prevents the printer from printing or causes
scrambled print.)
NOTE: The integrated parallel port is automatically disabled if the system detects an installed
expansion card containing a parallel port configured to the same address as specified in the
Parallel
Port
option in the
System Setup program
.
Mouse Connector
Your system uses a Personal System/2 (PS/2)-compatible mouse. The mouse cable attaches to a 6-pin
miniature Deutsche Inductive Norm (DIN) connector on the back panel of your computer. Turn off the
computer and any attached peripherals before connecting a mouse to the computer.
A PS/2-compatible mouse works as does an industry-standard serial mouse or bus mouse except that it has
its own dedicated connector, which frees up the serial ports and does not require an expansion card. Mouse
driver software gives the mouse priority with the microprocessor by issuing interrupt request (IRQ) 12
whenever a new mouse movement is made. The drivers also pass along the mouse data to the application
that is in control.
USB Connectors
