Serial Port Addresses - IBM Aptiva Handbook

    
IBM Aptiva PCs have a built-in external serial port already installed in the computer. The connector for this port is located at the
back of your computer. This port can be used to connect a serial mouse, serial printer, or other serial device and to transfer data
between computers.
The built-in serial port supports the following addresses and interrupts.
Table 6: Serial port addresses
Address COM# Interrupt Default
3F8 COM1 IRQ 4 Serial port
Conflicts may arise if you add adapter cards with serial ports or if you change the address settings on your modem if you are
using an operating system other than Windows 98. You can resolve most of these conflicts by using Setup or the Windows 98
Device Manager to change serial port addresses. See "Onboard serial port 1 " on page 6-13 or "Resolving resource conflicts" on
page 7-3 for more information.
A-8 Appendix A: Specification tables