1-8 CHAPTER 1: INTRODUCTION
IBM PC or Compatible Requirements
An IBM-compatible PC must have the following:
■A 386, 486, or Pentiumâ processor
■An available serial communications port
For sustained performance at higher data rates (57.6 Kbps
and 115.2 Kbps), it is recommended that your IBM or IBM-
compatible PC serial COM port be equipped with a 16C550
UART (universal asynchronous receiver/transmitter). To
determine what UART is installed in your PC, run the
Microsoftâ Diagnostic Program (msd) from the DOS prompt.
In addition, for reliable high-speed serial port performance in
the Microsoft Windows environment, a TurboComä driver for
Windows, which replaces the standard Microsoft Windows
COM driver, is included with the 3Com Impact digital modem.
■MS-DOSâ or IBM PC DOS 3.1 or later operating system
■640 Kilobytes of conventional memory
■Microsoft Windows 3.1 or later (optional)
■A hard disk drive with 1 MB of free space
Apple Macintosh Requirements
An Apple Macintosh computer must be a Macintosh Plus or
later model. It must also have the following:
■An available serial communications port
The highest possible serial port data rate with most
Macintosh computers is 57.6 Kbps. Some later Macintosh
models (AV and Power Macintoshä) have data rates of up to
115.2 Kbps. 3Com recommends that you use the 8-pin serial
communications port on your Macintosh.
■System 7 or later operating system
■A hard disk drive with 1 MB of free space