Apple PC Serial and Parallel Card - Manual (Page 83)

The PC Serial and Parallel Card has two standard PC ports that allow you to
use several kinds of PC-compatible peripheral devices from the Windows or
DOS environment (but not from the Mac OS environment). You use this card
in conjunction with a 7-inch or 12-inch PC Compatibility Card. If you do not
already have a PC Compatibility Card installed, you must install it along with
the PC Serial and Parallel Card.
With a PC Serial and Parallel Card connected to a PC Compatibility Card,
you can
m connect high-speed RS-232 serial devices such as modems
m connect parallel devices such as printers, removable media drives, and
security dongles that are supplied with some Windows or DOS software
applications
ix
Read This Before You Install Your Card