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Monster Media 1994 #1
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README
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1994-02-05
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Notes on HamComm 2.3: Paderborn, February 5th 1993
- HamComm is a program for ham radio communications. It supports
reception and transmission of amateur radio teletype (RTTY) and Morse
code (CW) signals. A decoder for SHIP and SYNOP reports from weather
stations is also included.
- HamComm doesn't require an RTTY converter, not even a modem chip.
The audio output of the transceiver is connected to the serial port
of any PC/XT/AT compatible computer thru a very simple and low-cost
circuit. Only one IC is needed (Op-Amp LM741 or similar) and a few
diodes, capacitors and resistors. For transmission the speaker
output is connected to the microphone input of the transceiver thru a
passive r/c filter. There is also a tone signal available at the COM
port without any modification to the computer. Audio frequency
decoding and serial/parallel conversion are all done by the program.
- HamComm will automatically detect the type of video adapter in use.
MDA, CGA, EGA, VGA and Hercules are supported. All graphics routines
are written in assembler for speed. No attempt has been made to
avoid screen flicker (snow) on cheap CGAs.
- HamComm works to some degree on XT maschines, but the graphics
displays of the input signal are more fun to watch on an AT-class
computer. Nearly all of the functions can also be controlled by
using a mouse. A harddisk is recommended but not required. All
texts are written in english and the online help system includes the
schematics for the interface circuit. There are also predefined
standard phrases, a QTH distance/direction calculator and a callsign
decoder. Currently about 320KB of free ram is required.
- HamComm will probably NOT run under any kind of multitasking software
like Desqview, Windows or OS/2 since it needs direct control of the
interrupt controller, timer chip and serial I/O hardware.
- On startup the program automatically searches for a configuration
file called "HC.CFG". The current directory is searched first, then
all other directories in the current "PATH" environment variable. A
sample config file is provided. Read it carefully and make the
required adjustments using your favourite text editor.
- The converter schematics are included in the online help texts.
To see them do the following:
1. Start the program,
2. Hit ALT-H to start the help subsystem,
3. Hit the letter 'O' to select topic 'Overview',
4. Hit the TAB key to select topic 'Converter' and hit return,
5. Scroll the help text using the cursor-up/cursor-down keys
and read the text.
- HamComm is NOT in the public domain.
It is Copyright (c) 1990,1991,1992,1993 and 1994 by Wilhelm F. Schroeder.
All rights reserved.
You are granted a limited license to use this software for evaluation
purposes for a period of 30 days. If you intend to continue using
this software after the 30 day evaluation period, you must make a
registration payment of $20 to Wilhelm F. Schroeder. See the
documentation for details.
- The author can be reached via the packet radio mailbox system. Send
your error reports and comments to "DL5YEC@DB0BQ.DEU.EU". If you
have access to e-mail then try "schroeder.pad@sni.de". If you have
access to Usenet you can post HamComm related questions to newsgroup
"rec.radio.amateur.misc".
Have fun!
73 es 55 de Django DL5YEC