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-
- Notes on HamComm 3.0: Paderborn, June 15th 1994
-
- HamComm is a program for ham radio communications. It supports
- reception and transmission of radio teletype (RTTY), AMTOR ARQ/FEC,
- SITOR A/B, NAVTEX and Morse code (CW) signals. A decoder for SHIP and
- SYNOP reports from weather stations is also included.
-
- HamComm does not 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 low-cost interface.
- 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 in software.
-
- 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 370KB of free ram is required.
-
- HamComm will probably NOT run under any kind of multitasking software
- like Desqview, Windows, Windows NT or OS/2. 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 interface schematics are included in the online help texts and
- near the end of the manual. There is also a section on trouble shooting
- in case of hardware problems.
-
- HamComm 3.0 Copyright (c) 1990 - 1994 by W.F. Schroeder DL5YEC All
- rights reserved. This is NOT a "public domain" or "freeware" program.
-
- 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. See the documentation for details.
-
- The author can be reached via the packet radio mailbox system. Send
- your error reports, suggestions and comments to "DL5YEC@DB0BQ.DEU.EU".
- If you have access to the internet try e-mail to "schroeder.pad@sni.de".
- If you have access to Usenet you can post HamComm related questions to
- newsgroup "rec.radio.amateur.digital.misc".
-
- Have fun!
-
- 73 es 55 de Django DL5YEC
-