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- "Documentation" for the RTTY program.
-
- The basic program you will recognize as PC-TALK III and all
- credit due the authors is hereby acknowledged. My objective
- was to not modify any of the functions of PC-TALK III and
- best I know that's the case. The only exception I can think
- of is that <ALT-J> in the original PC-TALK III does the same
- thing as <ALT-K> (redefine the function keys) and I stole
- <ALT-J> for another function. Otherwise refer to the PC-TALK
- III documentation first and then look here for the
- modifications I made. I am assuming an AEA CP-1 interface
- with with a serial interface. Whether it will work on
- anything else...that's up to you. I used an article is the
- September 1981 issue of QST as a reference for the speeds,
- codes and general RTTY stuff. Other reference material that
- might help ( and that I used ) were the Technical Reference
- Manual for the IBM-PC and the Basic Manual for the IBM-PC.
-
- <ALT-?> Definitions.
-
- <ALT-U>
- This turns on or off the RTTY translation process. When the
- program starts RTTY is off. <ALT-U> will display "RTTY ON"
- and will begin translating the incoming and outgoing
- characters between ASCII and RTTY 5 bit "BOUDOT" code.
-
- <ALT-J>
- This is hard coded to spit out my call sign, the date and
- time. To be done properly this should be part of the default
- file but I got lazy. You could certainly alter the call sign
- to your own. Matter of fact I would prefer it!
-
- <ALT-H>
- This switches between COM1: and COM2:. A message is
- displayed to indicate the current status and the program
- initializes to the default file.
-
- <ALT-B>
- This will allow you to enter a different data rate. The
- program will ask you for a new speed. If you respond with a
- <?> the program will return with the current setting. For
- example, entering 45.45 will result in the proper "bits per
- seconds" setting for standard "60 WPM" RTTY.
-
- <ALT-N>
- This will switch between the two versions of FIGS that I
- found in the previously mentioned artical.
-
- <ALT-A>
- This will turn the transmitter on and off. What it really
- does is set or reset the "Request to Send" line out of the
- serial port. Nothing will be displayed.
-
- <ALT-O>
- This will force a switch between LTRS and FIGS. This is
- sometimes handy if you happen to loose one of those
- characters and end up receiving garbage because you're in the
- wrong case.
-
-
- Operation
-
- In general, the standard way of getting RTTY "up" is to first
- start the the RTTY program. When it is ready it will display
- the message "Ready". Then you can set the communications
- port address using <ALT-H> to the port where the interface
- is. (I have two serial ports and simply switch between them
- using <ALT-H>). Then you use one of the dialing directory
- entries to set the number of data and stop bits. The entry
- name is not important other than to remind you what it is.
- Hit <ALT-D> and select the entry you have set up with the
- proper communications parameters and hit enter. The phone
- number should be left blank ( although I haven't ever tried
- it with a number there. It won't do anything other than send
- the number out the port! ) The speed can be set to anything
- because you will set that later with the <ALT-B> command.
- Data and stop bits are important here and this is the only
- way to alter them. Since Basic and the original PC-TALK III
- logic opens the serial port when executing the <ALT-D>
- command, the speed will be set at whatever you had in the
- dialing directory. Problem is that Basic only accepts
- certain values ( see the manual ) and causes error messages
- on anything it doesn't like. Therefore one of the next
- commands ought to be the <ALT-B> command to set the speed.
- Again, due to Basic and previous program logic, the program
- will turn on the transmitter as soon as the <ALT-D> command
- is executed. You may or may not want to turn it off at this
- point. The last thing that is necessary is to turn on the
- RTTY tranlation process with <ALT-U>. There you are, ready
- to send and receive Radio TeleTYpe.
-
- One word of advise. Compile this thing! Basic has a nasty
- habit of wondering off into never-never land when it comes
- time to clean up the string character space. For this
- program this process can take as long as 5 minutes! Once
- compiled the clean-up time is less than 1 second. (Don't
- ask. If you must then ask IBM!) Also, heed the warnings in
- the PC-TALK III documentation concerning communication buffer
- sizes.
-
- If you have any questions I will be glad to answer any that I
- can. I make no claims about quality of the code or whether
- it conforms to any known standards. Enjoy.
-
- Steve Darling KA9DCA
- 3408 33rd Street
- Moline, Illinois 61265
- (309) 762-5342