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- Copyright (C) 1989 George A. Stanislav.
- All Rights Reserved.
-
- IS16550.COM is a simple utility to determine if the UART in the serial port
- of your PC is the new NS16550AN. The advantage of this chip, for the PC user,
- is in its internal buffer which is important for the new fast machines,
- especially those built around the 80386 microprocessor.
-
- One simple method of determining what type of UART your machine contains is
- to open the computer, pull out the serial card and read the inscription off
- the UART chip. Unfortunately, this is not always possible (as when you are
- buying a computer from an ignorant salesman).
-
- Instead, running a simple program to determine the type of UART in the system
- serial port is a better solution.
-
- IS16550 will determine whether an NS16550AN UART is installed in a system. It
- can check serial ports COM1 - COM4. If you do not specify the port(s), COM1
- will be checked. You can specify one or more serial ports in one run of the
- program.
-
- For example, if your system has two serial ports, you could enter:
-
- IS16550 at COM1 and COM2 ?
-
- Yes, you can type it as a whole sentence if you wish. Or you can make it as
- terse as:
-
- IS16550 1234
-
- to check all four ports.
-
- Note that there exists an NS16550 UART. This one has all the advantages of
- the NS16550AN, except for the buffers. The IS16550 program can distinguish
- between the two and will suggest a replacement if it detects the older chip.
-
- Full assembly language source code is enclosed for anyone interested in the
- detection of the presence of the NS16550AN UART.
-
- This program is offered as is, with absolutely no guarantee whatsoever.
-
-