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-
- Notes on HamComm 2.0: Paderborn, October 15th 1991
-
- - HamComm is not public domain and it is not shareware: it's FREEWARE,.
- The author keeps the copyright and all other rights.
- You are NOT allowed to:
- - make any modifications to the program
- - distribute the program without this file
- - take more than $10 for distribution including all costs
- You ARE allowed to:
- - use this program freely for any non-commercial purpose
- - make as many copies as you like and give them away
- You don't have to register, don't have to pay anything and i don't
- expect any donations. (but i take 'em :-)
-
- - HamComm is a program for ham radio communications. In its current
- state it supports reception and transmission of amateur radio teletype
- (RTTY) and Morse code (CW) signals. The interesting thing about it is,
- that it doesn't require a 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. Audio frequency decoding and serial/parallel conversion is 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 on XT maschines, but the graphics displays of the input
- signal are more fun to watch on an AT-class maschine. Nearly all of
- the functions can also be controlled by using a mouse. A harddisk is
- 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 310KB 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. If you find
- yourself unable to select COM1 from the PORT menue then this is the
- right place to look.
-
- - 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.
-
- - Option '-l43' on the commandline will switch to 43 line ega mode.
-
- - Option '-l50' on the commandline will switch to 50 line vga mode.
-
- - The author can be reached via the packet radio mailbox system. Send
- your error reports and comments to "DL5YEC@DB0BQ". If you have access
- to e-mail then try "uunet!nixbur!schroeder.pad". If you have access to
- Usenet you can post HamComm related questions to newsgroup
- "rec.radio.amateur.misc".
-
- - Special thanks go to OM Winfried (DL1YCE) and OM Ben (DL6RAI) for
- numerous hours of testing and many helpful suggestions.
-
-
- Have fun!
-
- 73 es 55 de Django DL5YEC
-
-
- If you like HamComm, tell your friends about it.
- If you don't, tell me why.
-