Acer Dock IV Quick Manual page 4

A Look at DockMate IV
Important!
You can only select either the 25-pin FDD port or
the 25-pin parallel port. The two ports cannot be
used simultaneously.
Set the FDD/Printer switch to the FDD icon
using a floppy disk drive. Set to the Printer icon
when using a printer.
The infrared port is not available when the
notebook is docked.
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