HP CD-Writer Plus User Manual page 15

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4. Locate the parallel port (printer port) connector on your computer.
If you are having trouble finding the parallel port connector, your printer
may already be attached to it. The CD-Writer Plus drive can share the
parallel port with your printer.
If the CD-Writer Plus drive and your printer will share the parallel port,
go to the next step.
If the CD-Writer Plus drive will not share the parallel port with your
printer, proceed to step 6.
Connecting CD-Writer
Select an available parallel port.
TIP: Your CD-Writer Plus drive can share
a parallel port with a printer.
Parallel ports
have receptacles
for 25 pins.