Internal Modem Installation With Windows 3; A Word About Com Ports And Irqs - US Robotics Sportster Operating Instructions Manual

You'll need these items from your
Sportster modem box:
modem
Connections CD
Plus:
a screwdriver (not included)
I M I
NTERNAL ODEM NSTALLATION WITH
phone cord
W 3.
INDOWS X
A Word about COM Ports
and IRQs
Most computer accessories — a mouse,
sound card, enhanced graphics card, scanner,
etc. — require a special connection through
which they can communicate with the
computer. For some devices, this connection is
called a communications (or COM) port. Most
computers have 1 or 2 COM ports, but they
can have up to 4. Although internal modems
do not connect to COM ports directly, they do
require a COM port setting, which is
determined by the setting on the modem's
COM jumper pins.
Each COM port uses an interrupt request
(IRQ). An accessory uses an IRQ to get the
attention of your computer's central processing
unit (CPU) so that the accessory can perform
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