MFJ-1270C/1274C COMPUTER INTERFACING
Page 4
COMPUTER INTERFACING
You are now ready to attach your MFJ TNC to your station computer or
terminal. Throughout this manual we will use the term "computer" to refer to
the computer or terminal you use to communicate with your MFJ TNC .
The MFJ TNC communicates with your computer through a serial port using
signals corresponding to a standard called RS-232C. Why an RS-232C
interface? Nearly every computer in production today either incorporates an RS-
232C style serial port as a standard feature, or has one available as an optional
accessory, either from the computer manufacturer or from a manufacturer of
computer accessories. In addition to the RS-232C port, the MFJ TNC has a
built- in TTL port to allow interfacing with computers which need TTL signals
such as the Commodore C-64, C-128 or the VIC-20.
Computer program\, see Terminal program
In order to use the MFJ TNC with your computer, the computer must have an
RS-232C serial port, or a TTL serial port and a program to support the serial
or TTL port. The program will typically be called a modem, terminal emulator,
or communications program.
Since there are so many computers on the market today, it is impractical for this
chapter to provide detailed instructions for each computer. Detailed information
is given for some of the popular models available in the United States. Also
provided is general computer interfacing information.
MFJ Terminal Software Starter Packs
MFJ Enterprises, Inc. offers a Starter Pack for some of the most popular
computers. These Starter Packs contain a terminal program and a cable for
connecting the MFJ TNC to your computer. The Starter Packs available are
listed below and also on the following page:
MFJ-1282:Commodore VIC-20, C64, C128 on 5-1/4" diskette.
MFJ-1283: Commodore VIC-20, C64 on tape.
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