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1-8 CHAPTER 1: INTRODUCTION
IBM PC or Compatible Requirements
An IBM-compatible PC must have the following:
■ A 386, 486, or Pentium
â
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
Microsoft
â
Diagnostic Program (msd) from the DOS prompt.
In addition, for reliable high-speed serial port performance in
the Microsoft Windows environment, a TurboCom
ä
driver for
Windows, which replaces the standard Microsoft Windows
COM driver, is included with the 3Com Impact digital modem.
■ MS-DOS
â
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 Macintosh
ä
) 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