IBM Aptiva Series Hardware Maintenance page 42

Onboard communication ports
Serial ports
Your computer comes with two 9-pin serial ports. The serial port parameters
display the current address for the serial ports in your computer.
Use the serial port parameters to make sure that each serial port has a
different address. If you change serial port addresses, you might also need to
make changes in the software that uses serial ports. For instructions on
changing your software, see the user's guide or online documentation that
came with the software.
Parallel port
Your computer comes with one parallel port. This parameter displays the
current address for the parallel port on your system board.
Use this menu to make sure that each parallel port has a different address. If
you change parallel port addresses in this menu, you might also need to make
changes in the software that uses the parallel port. For instructions on
changing your software, see the user's guide or online information that came
with the software.
Operation mode
As long as the parallel port setting is not disabled, this item allows you to
choose an operation mode for the parallel port.
You can select either the Standard mode or one of the extended modes
(Bidirectional, EPP, or ECP) for a parallel port operation mode. The extended
modes increase the efficiency of your parallel port; however, these modes use
recent technology and are only supported by newer hardware (such as some
printer models). The available extended modes are:
•
Standard This mode allows for one-way operation at a normal speed.
•
Bidirectional
speed.
•
EPP This mode allows for a bidirectional parallel port operation at a
maximum speed.
•
ECP This mode allows the parallel port to operate in a bidirectional mode
and at a speed higher than the maximum data transfer rate.
This mode allows for a two-way operation at a normal
General Information 1-23