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Text File | 1985-06-15 | 45KB | 1,218 lines

ACBHFT A - HFHF-GERadio Teletype ProgramHF- - HFHF-GEFor The IBM Personal ComputerHF- - HFHF-GEVersion 1.1HF- - HFHF-GEApril 4, 1983HF- - HFHF- - HFGlenn E. Welman - KF4NB - HF3301 Pastern Ct. - HFLexington, Ky 40513 HF - IBM PC RTTY Ver 1.1 - HFGETable Of Contents - HFG 1.0 INTRODUCTION........................................ 1 - HF 1.1 DISTRIBUTION GUIDELINES.......................... 1 - HFG 2.0 PROGRAM OPERATION................................... 2 - HF 2.1 FEATURES......................................... 3 - HF 2.2 SPECIAL KEYS..................................... 4 - HF 2.3 FUNCTION KEYS.................................... 6 - HF 2.3.1 GENERAL FUNTION KEYS........................ 6 - HF 2.3.2 FUNCTION KEY SET 1.......................... 6 - HF 2.3.3 FUNCTION KEY SET 2.......................... 8 - HF 2.4 PROGRAM FILES................................... 10 - HF 2.4.1 REQUIRED FILES............................. 10 - HF 2.4.2 OPTIONAL FILES............................. 11 - HF 2.5 UTILITY PROGRAM................................. 13 - HFG 3.0 INTERFACE INFORMATION.............................. 14 - HF 3.1 INTERFACE SIGNALS............................... 14 - HF 3.2 KANTRONICS 'THE INTERFACE' INFORMATION.......... 15 - HF 3.3 KANTRONICS RS-232C INTERFACE SCHEMATIC.......... 16 - Table Of Contents ii HF - IBM PC RTTY Ver 1.1 - GE-1.0 INTRODUCTIONHF- - HFThis program runs on the IBM Personal Computer and - HFinterfaces to your Amateur Radio equipment through the - HFAsynchrounous Communications adapter. I wrote the program - HFto be as flexible as possible hoping that it will be useable - HFwith any Terminal Unit (TU) and radio combination. I have - HFattempted to provide enough information to help you make - HFyour system operational. - HFI intend for the program to be distributed by hams, rather - HFthan retailers. I suggest the following. - GE-1.1 DISTRIBUTION GUIDELINESHF- - HFPlease share the program with others who are interested - HFin RTTY. - HFPlease don't sell or barter the program to anyone. - HFWhen you pass along the program, include only the - HForiginal unmodified version. - HFSend a SASE along with your current version number and I - HFwill let you know if any known problems have been fixed - HFby a later version. - HFDon't remove these guidelines from the program or - HFdocument. - HFIf you find the program of value, a small contribution - HFto the cause would be appreciated ($25 suggested). - 1.0 INTRODUCTION 1 HF - IBM PC RTTY Ver 1.1 - GE-2.0 PROGRAM OPERATIONHF- - HFThe program is started by placing the program diskette in - HFthe default drive (usually drive A:) and entering - HFRTTY - HFSeveral files should be personalized prior to running the - HFprogram with your callsign and other pertinent information. - HFThese files are identified further on in this document and - HFmay be changed with any text editor. The program is - HFprimarily written in BASIC and compiled to acheive a useable - HFoperating speed. There is one subroutine written in - HFAssembly Language to do things which I couldn't do well in - HFBASIC. Specifically, the routine scrolls half screens for - HFthe receive and transmit screens. - HFThe program takes advantage of the IBM Personal Computer's - HFcapabilities. The interrupt capabilities of the - HFAsynchrounous Communications adapter and the keyboard allow - HFmany things to occur simultaneously without the loss of - HFdesired information. The use of DOS files allows the - HFstorage and retreival of a large supply of RTTY data. I - HFhope you find the program's many features useful. - 2.0 PROGRAM OPERATION 2 HF - IBM PC RTTY Ver 1.1 - GE-2.1 FEATURESHF- - HFThe program will run on a 64K PC under DOS 1.1 and - HFsupports both the 80X25 mode and the 40X25 mode. - HFThe program runs in a split screen mode with received - HFdata displayed on the top half and the transmit buffer - HFdisplayed on the bottom half of the screen. Run time - HFinformation is displayed in the center of the screen, - HFsuch as current time, date and elapsed time since the - HFlast TTY ID was sent. Prompts for operator input are - HFdisplayed in the center of the screen. The definition - HFand status of the function keys is displayed at the - HFbottom of the screen. Errors are also reported at the - HFbottom of the screen. - HFThe program supports both BAUDOT and ASCII RTTY modes. - HFCommon BAUDOT rates of 60, 67, 75, and 100 WPM are - HFsupported. Common ASCII baud rates of 110 and 300 BAUD - HFare also supported. - HFThe received input goes to the display and can be - HFdirected to the printer and/or a DOS file. File - HFcompression is supported which can result in using less - HFDOS file space. - HFWhile you are receiving, you can fill a 1000 character - HFtransmit buffer from the keyboard or DOS files. - HFWhile the program is prompting you for information, - HFreceived characters are placed into a 2000 character - HFreceive buffer. If more than 2000 characters are - HFreceived while the program is prompting you, a - HFcommunications buffer overflow error will result. The - HFprogram will attempt to recover as much as possible. - HFThere are several predefined files which can be loaded - HFinto the transmit buffer with the stroke of a function - HFkey. Up to six files can be qued to be placed into the - HFtransmit buffer at any one time. - HFA cursor is displayed at the current Transmit buffer - HFlocation. When the cursor reaches column 64, the - HFprogram will sound a beep. - HFThe transmit buffer can be edited minimally by using the - HFbackspace key. There is no full screen support. - HFIn the transmit mode, a date and time stamp can be sent - HFover RTTY, as well as, a predefined RTTY ID field. - HFThere is a key defined to allow the storage of the - HFcallsign of the other station in the QSO. The contents - HFof this storage field will be placed at the beginning of - HFthe TTY ID when it is selected. This buffer can be - HFchanged at any time. - 2.0 PROGRAM OPERATION 3 HF - IBM PC RTTY Ver 1.1 - HFThe transmit buffer is filled first by any transmit - HFfiles, second by characters resulting from special keys, - HFand finally from keyboard input. The program will stop - HFplacing characters in the transmit buffer when it is - HFfull and will resume as characters are transmitted from - HFthe transmit buffer. - GE-2.2 SPECIAL KEYSHF- - HFBackspace - Pressing the backspace key erases the last - HFcharacter entered into the transmit buffer and the - HFcursor backs up. If the last character was a line feed, - HFthe cursor backs up to the previous line and the - HFcharacter is displayed in reverse video. When you - HFbackspace beyond the top line of the transmit screen, - HFthe previous line entered into the transmit buffer - HFappears on the top line. Lines prior to the line at the - HFtop of the screen are not visible. Note that you cannot - HFback up beyond the last character sent to the - HFAsynchronous communications adapter. - HFENTER - Pressing the "ENTER" key at the end of a line - HFcauses a carriage return and line feed to be placed into - HFthe transmit buffer. - HFCtrl S - Pressing Ctrl S causes the program to prompt - HFyou for a line of characters which will be stored for - HFlater retreival. The information is kept in memory - HFuntil the program is ended or another Ctrl S is entered. - HFCtrl R - This is the companion key of Ctrl S. Pressing - HFCtrl R retrieves the stored line and places it in the - HFtransmit buffer. - HFCtrl W - Ctrl W is pressed to instruct the program to - HFplace only a carriage return in the transmit buffer. - HFPressing the "ENTER" key immediately after a Ctrl W will - HFbe ignored by the program. Pressing a character key - HFwill result in an overprint condition. The Ctrl W key - HFwill find primary application in sending RTTY art. This - HFcharacter is placed in the receive file for any carriage - HFreturn. An idea of what character may be displayed by - HFvarious editors can be found in appendix C of the - HFTechnical Reference manual. - HFCtrl T - Ctrl T is the companion of the Ctrl W key and - HFresults in a single line feed being placed in the - HFtransmit buffer. Pressing "ENTER" immediately after a - HFCtrl T will be ignored by the program. The Ctrl T key - HFwill be used in RTTY art and may be used to replace a - HFline feed erased by backspacing. This character is - HFplaced in the receive file for any line feed. An idea - HFof what character may be displayed by various editors - HFcan be found in appendix C of the Technical Reference - 2.0 PROGRAM OPERATION 4 HF - IBM PC RTTY Ver 1.1 - HFmanual. - HFCtrl X - Ctrl X is provided to force the sending of the - HF"Figures" character in Baudot mode only. Only time will - HFtell the uses of this key. This key will appear in the - HFtransmit buffer as a up arrow. - HFCtrl Y - Ctrl Y can be used to force the sending of the - HF"Letters" character in BAUDOT mode only. I'm not sure - HFwhat use this key is either. This key will appear in - HFthe transmit buffer as a down arrow. - HFAlt A - Alt A can be used to toggle between the Art mode - HFand the No Art mode. Art mode is for overstrike lines - HFto darken (fill in) the print. The No Art mode is used - HFfor noisy conditions (primarily text) where you want a - HFCR/LF any time a CR or LF is received for maximum copy. - HFThe status of the Art mode is included at the bottom of - HFthe screen in the receive mode. Art mode is indicated - HFby an "A" beside "RECV" and the No Art mode is indicated - HFby an "N". - HFCntl E - Cntl E is a new added feature. Typing a Cntl E - HFinto the transmit buffer will cause the program to - HFautomatically return to the receive mode upon reading - HFthe Cntl E from the transmit buffer. Additional - HFtransmit buffer contents are retained but not - HFtransmitted until the XMIT mode is entered again. This - HFshould be useful when you are transmiting a long file - HFand you want to take a break and may not make it back in - HFtime to switch it over manually. - 2.0 PROGRAM OPERATION 5 HF - IBM PC RTTY Ver 1.1 - GE-2.3 FUNCTION KEYSHF- - HFThe ten function keys are used during program operation to - HFdirect the flow of information in the computer system. The - HFdefinition and status of the function keys is displayed at - HFthe bottom of the screen. The function keys are defined as - HFfollows: - GE-2.3.1 GENERAL FUNTION KEYSHF- - HFF1 - KEYS - HFThis key toggles the definition of function keys 3 - HFthrough 10 and changes the status line. - HFF2 - RECV/XMIT - HFThis key toggles the program between receive mode - HFand transmit mode. When the program begins, this - HFkey defaults to RECV. When the key is pressed to go - HFfrom XMIT to RECV, the program will wait until the - HFbasic communication buffer is empty before returning - HFto the RECV mode. BASIC buffers up to 128 - HFcharacters independent of the program. So don't get - HFtoo anxious if the transmitter doesn't stop - HFimmediately. - HFThere is a short delay of about one half a second - HFfrom the time the program turns the transmitter on - HFand the first data is sent. This should give the - HFother station a chance to lock onto your signal. - HFAdditionally, an A or N will appear with RECV to - HFindicate the current status of the Art mode (See Alt - HFA for additional information). - GE-2.3.2 FUNCTION KEY SET 1HF- - HFF3 - RX FLE - HFReceive a File. Pressing this key prompts you for a - HFfilename in which to place the received information. - HFThe information is appended to the file. Pressing - HFonly "ENTER" results in no file being opened. - HFPressing this key while a file is currently open - HFwill close the file. Another filename must be - HFentered to continue saving data. Entering the same - HFname as an existing file will result in that data - HFbeing appended to the file. - 2.0 PROGRAM OPERATION 6 HF - IBM PC RTTY Ver 1.1 - HFWhen a filename is entered, you are asked if you - HFwant the file to be saved as a compressed file. - HFCompressed files will take up less room on your DOS - HFdiskette, but are not readily alterable in an - HFeditor. A utility is provided to decompress or - HFcompress a file offline. - HFWhen a receive file is open, a reminder is displayed - HFon the center line of the screen. The form of the - HFdisplay is "RX-filename". - HFF4 - UOS ON/UOS OF - HFThis key toggles between "Unshift On Space" being - HFturned on and turned off. This key only applies to - HFreceived data. When "unshift on space" is on, the - HFprogram will shift back to "letters" mode any time a - HFspace, carriage return or line feed is received. - HFIndependent of this key, the program will transmit a - HF"letters" character in the BAUDOT mode as required - HFwith a space, a carriage return or a line feed. - HFThis makes the program compatible with either type - HFof teletype which may be in the other station. When - HFthe program begins, this key defaults to UOS ON. - HFF5 - END - HFThis key provides a means to terminate the program - HFgracefully. You will be prompted for confirmation - HFof your request to quit. - HFF6 - PRT OF/PRT ON - HFThis key toggles output to the printer on and off. - HFWhen PRT ON is displayed, all characters received - HFwill also be printed on the matrix printer. Bell - HFcharacters are not sent to the printer to keep down - HFthe noise pollution. When the program begins, this - HFkey defaults to PRT OF. - HFF7 - 45.5/50.0/56.9/74.2/110/300 (Actual Baud Rate) - HFThis key toggles through the baud rates supported by - HFthe program. The status line is updated with each - HFchange. In Baudot mode, the baud rates of 45.5, - HF50.0, 56.9, and 74.2 correspond to character rates - HFof 60, 67, 75, and 100 words per minute (WPM) - HFrespectively. When the program begins, this key - HFdefaults to 45.5. - HFF8 - BAUDOT/ASCII - HFThis key toggles between Baudot and ASCII modes. - HFAny combination of baud rate and mode is obtainable. - HFWhen the program begins, this key defaults to - HFBAUDOT. - 2.0 PROGRAM OPERATION 7 HF - IBM PC RTTY Ver 1.1 - HFF9 - NEW LN - HFThis key provides the ability to force a CR/LF (new - HFline) in the middle of received text. Such an - HFoperation might be needed if the original CR/LF were - HFlost in the noise. - HFF10 - LTRS - HFThis is the "letters" key. During Baudot reception - HFit is occaisionally desirable to force the receive - HFmode back into the "letters" mode. This key - HFaccomplishes that task. - GE-2.3.3 FUNCTION KEY SET 2HF- - HFF3 - TX FLE - HFTransmit a File. Pressing this key allows the - HFcontents of a DOS file to be placed into the - HFtransmit buffer for transmission. You will be - HFprompted for the filename of the file to transmit. - HFPressing just "ENTER" will result in no file being - HFtransmitted. Entering the word "stop" will cause - HFthe current file being processed to be closed. - HFThe filename is placed in a buffer que which will - HFeventually be opened and read. This allows for - HFplacing several transmit files into the transmit - HFbuffer in sequential order. The filename of the - HFfile currently being read is displayed on the center - HFdisplay line. The form of the display is - HF"TX-filename". - HFIf an error is encountered in opening the file, an - HFerror status is displayed for about a second at the - HFbottom of the screen and a beep is sounded. - HFF4 - TX CQ - HFTransmit a CQ. Pressing this key causes the file - HF"CQ.RTY" to be loaded into the transmit buffer. - HFThis file is qued just like a transmit file and is - HFdisplayed on the center screen. Note that you must - HFpersonalize the "CQ.RTY" file with your callsign and - HFname. - HFF5 - RESET - HFThis is the reset key. Pressing this key will close - HFall transmit files, clear the screen and start the - HFprogram over. There is no prompting to make sure - HFyou mean it. Note, BASIC sometimes decides to clean - HFup the string area at the most inappropriate times. - 2.0 PROGRAM OPERATION 8 HF - IBM PC RTTY Ver 1.1 - HFWhen it does this, the system may appear to lock up - HFfor several seconds (maybe many), so try to be - HFpatient. - HFF6 - TX RYS - HFTransmit RYs. Pressing this key will result in the - HF"RYS.RTY" file to be placed into the transmit file - HFque and eventually into the transmit buffer. This - HFis handy for placing a bunch of RYs at the start of - HFyour transmission, which gives the guy at the other - HFend a chance to lock back onto your signal. - HFF7 - PSE OF/PSE ON - HFTransmit Pause Off / Transmit Pause On. This key is - HFused to temporarily stop the program from sending - HFany more characters out of the transmit buffer. - HFThis is useful for sending a steady carrier signal - HFfor tuning purposes or whatever. It should be - HFnoted, that BASIC can buffer up to 128 characters. - HFThese characters cannot be stopped from being sent. - HFThus, you may not be able to make the program pause - HFexactly where you want. When the program begins, - HFthis key defaults to PSE OF. - HFF8 - TTY ID - HFTeletype ID. Pressing this key causes the contents - HFof the "TTYID.RTY" file to be placed into the - HFtransmit buffer. The contents of the QSO ID buffer - HFis placed at the beginning of the line. Note that - HFthis line of data is read from the file at the - HFbeginning of the program and stored in program - HFmemory. Also note that the "TTYID.RTY" file must be - HFpersonalized with your name and callsign. The - HFlittle block at the end of the TTYID when it is - HFplaced in the buffer is used by the program to reset - HFthe time since last ID. - HFF9 - QSO ID - HFThis key prompts you for an entry of the current QSO - HFstation id. The data entered is placed at the - HFbeginning of the TTY ID when that key is pressed. - HFF10 - DT&TM - HFDate and Time stamp. This causes the current date - HFand time to be placed into the transmit buffer. - HFNote that the time sent is the time the key is - HFpressed, not the time the characters are actually - HFsent. - 2.0 PROGRAM OPERATION 9 HF - IBM PC RTTY Ver 1.1 - GE-2.4 PROGRAM FILESHF- - HFThere are three files which the program expects to find on - HFthe default DOS drive. If any of these files are absent, - HFthe results will be unpredictable, possibly resulting in the - HFprogram dying in the middle of a QSO. There is also an - HFoptional file which may be absent with no adverse effects. - HFThe files are described below. - GE-2.4.1 REQUIRED FILESHF- - HFTTYID.RTY - This file is required to have one line only. - HFThe line contains the characters to be placed in the - HFtransmit buffer for your RTTY ID (e.g. DE KF4NB "GLENN" - HFIN LEXINGTON, KY). Note, you must personalize this file - HFwith your callsign, name, location and whatever. - HFCQ.RTY - This file contains all the information you - HFwould like to send for a RTTY CQ. Note, you must - HFcustomize this file with your callsign, name, and - HFlocation. You may optionally change the format of the - HFCQ. This file may contain any number of lines. - HFRYS.RTY - This file is simply a line of RYs which will - HFbe sent in response to a function key being pressed. - HFThis file could be changed in just about any way you - HFdesired. Multiple lines are allowed. - 2.0 PROGRAM OPERATION 10 HF - IBM PC RTTY Ver 1.1 - GE-2.4.2 OPTIONAL FILESHF- - HFPARMS.RTY - This file can have one or more of the - HFfollowing keywords on a single line separated by commas - HFor on separate lines. Only the first four characters of - HFthe words are compared, so extra information between - HFcommas or on the line is ignored. - HFCOM2 - This keyword will cause the program to use - HFthe second async communications adapter for RTTY. - HFThe program default is the first adapter (COM1). - HFThis option may be useful if the first adapter is - HFprimarily used for some other reason such as a - HFtelephone modem or a serial printer. - HFDIDL - This keyword is provided for those folks who - HFlike to send something (even null) while the - HFtransmit buffer is empty. Null characters are sent - HFabout once per second while the transmit buffer is - HFempty. - HFECHO - This keyword causes each character sent to - HFthe BASIC "COMn:" port to be displayed on the - HFreceiver half of the screen. This option is - HFprovided for those who have TUs which do not place - HFthe transmitted data back onto the receive line - HFcoming back to the computer. The program default is - HFno ECHO. - HFNote - BASIC has a 128 byte transmit buffer. When - HFthis keyword is active, the receive screen shows the - HFcharacter when it is placed into the BASIC buffer. - HFIn other words, just because you see it on the - HFscreen doesn't mean it has been sent yet! - HFFSK - This keyword is provided to allow for ON/OFF - HFkeying of the transmitter for those who are not - HFusing a TU with an AFSK output which goes to the - HFmicrophone jack. The default is the AFSK mode. - HFFSK? - This keyword is for those people, like - HFmyself, who have two radios which may be used and - HFone uses the AFSK mode and the other uses the FSK - HFmode. If this keyword is specified, you are asked - HFat the beginning of the program if you want to run - HFin the AFSK mode. Any answer beginning with the - HFletter "Y" will place the program in the AFSK mode. - HFAny other entry will place the program in the FSK - HFmode. Refer to the Interface Information section - HFfor definitions of the signals used in the two - HFmodes. - HFLPT2 - This keyword allows the printer output to go - HFto the printer attached to the second printer - HFadapter. The default is the first printer adapter - HF(LPT1). - 2.0 PROGRAM OPERATION 11 HF - IBM PC RTTY Ver 1.1 - HFLPT3 - This keyword allows the printer output to go - HFto the printer attached to the third printer - HFadapter. The default is the first printer adapter - HF(LPT1). - HFQB - This keyword causes a bell character to be sent - HFany time a quote character is sent in the transmit - HFmode. This is possibly useful in RTTY ART, since - HFsome machines have the quote and the bell reversed. - HFNo action is taken in the receive mode. The default - HFis no QB. - HFZULU - This keyword is used to specify that time is - HFto be sent in a military format of the form "DDHHMMZ - HFMON YR", where DD is the day, HH is the hours, MM is - HFthe minutes, MON is the first three letters of the - HFmonth and YR is the last two digits of the year. If - HFthe time displayed on the screen is anything other - HFthan "UTC", you will be prompted at the start of the - HFprogram for the amount of time in hours to be added - HFto the local time to convert it to UTC time. - HFAnytime the timestamp is placed in the transmit - HFbuffer, the program will convert the displayed time - HFto "UTC" time, correcting for any overflow into the - HFnext day, month and/or year. Leap years are also - HFtaken into account. Additionally, when this keyword - HFis specified the timestamp will also be appended to - HFthe end of your "TTY ID". - 2.0 PROGRAM OPERATION 12 HF - IBM PC RTTY Ver 1.1 - GE-2.5 UTILITY PROGRAMHF- - HFA utility program has been provided to perform some of the - HFnormal program functions offline. The utility is started by - HFentering - HFRTTYU - HFThe program uses the same "PARMS.RTY" file to determine - HFwhich printer to use for output and to decide whether or not - HFto add a bell character after a quote. The program prompts - HFyou for the name of the file to be processed. A name must - HFbe entered and if any problems are encountered, the program - HFterminates. - HFYou are then asked if you want the processed data sent to - HFanother file. If you answer in the affirmative, you will be - HFasked the name for the file. Responding with only an - HF"ENTER" for the filename will be interpreted as meaning you - HFdo not really want to save the data in a new file. If the - HFfilename is OK, you are then asked if you would like the - HFdata in the new file compressed. Here again as in other - HFplaces, responding with anything other than a word starting - HFwith the letter "Y" will be taken to mean "NO". This - HFfeature should be good for uncompressing a file so it can be - HFedited or for compressing a file to save diskette space. - HFYou will also be asked if you want the file printed on the - HFmatrix printer. Answer in the affirmative if you would like - HFhard copy. Again, this routine does not send the noisy bell - HFcharacter to the printer. - HFRegardless of the choices you make in processing the file, - HFthe information is displayed on the display so you can keep - HFcurrent with the progress of the program. - 2.0 PROGRAM OPERATION 13 HF - IBM PC RTTY Ver 1.1 - GE-3.0 INTERFACE INFORMATIONHF- - GE-3.1 INTERFACE SIGNALSHF- - HFThis program interfaces to the Amateur Radio equipment - HFthrough the Asynchronous Communications adapter. The - HFspecifications for the voltage levels are those for a - HFstandard RS-232C interface. In particular, the standard - HFspecifies voltage levels of +12 volts and -12 volts to - HFrepresent the logic states of the signal. Further - HFinformation can be obtained in the Technical Reference - HFManual. The signals which the program uses are as follows. - HFPin 2 - Transmit Data (Tx data) - characters to TU - HFPin 3 - Receive Data (Rx data) - characters from TU - HFPin 8 - Carrier Detect (CD) - CW data in from TU - HFPin 4 - Request to Send (RTS) - Transmitter control - HFPin 20 - Data Terminal Ready (DTR) - CW ID control - HFPin 7 - Ground (Gnd) - reference level - HFFor Tx data and Rx data, mark is -12v and space is +12v. CD - HFis tied to Rx data and is not required for RTTY, however, I - HFexpect to use this line when and if I get around to writing - HFa Morse receive routine. - HFRTS and DTR are -12v in receive mode and +12v in normal - HFtransmit mode. - HFHopefully this is enough information to help you interface - HFto your terminal unit. - 3.0 INTERFACE INFORMATION 14 HF - IBM PC RTTY Ver 1.1 - GE-3.2 KANTRONICS 'THE INTERFACE' INFORMATIONHF- - HFWhile I will give information here on how I interfaced the - HFKantronics TU to my system, I must add that it was a - HFdecision based on availability and price at the time of - HFpurchase more than anything else. If you are trying to make - HFa decision, check around and see what is available and what - HFseems to work well. While the Kantronics does well in many - HFcases, it does seem to have difficulty with weak and/or - HFfading signals. The Kantronics interface does not provide - HFan RS-232C level interface and also requires an external - HFpower supply. Additionally, the RTTY transmit line requires - HFa normal space condition for receive to operate correctly. - HFBased on these considerations, I designed a special RS-232C - HFto Kantronics interface box. The schematic is included - HFbelow. - HFFirst, just a few words about the circuit. The interface - HFchips used are the same as those used in the IBM PC, namely, - HFthe 75150 line driver and the 75154 line receiver. The 1488 - HFline driver and 1489 line receiver from Radio Shack could - HFalso be used but the pinouts are different. The 74LS00 is - HFused to gate the Tx data signal with the transmitter - HFcontrol, to invert the RTTY transmit signal and to invert - HFsignals for the normal/reverse switch. The circuitry needs - HF+5v, +12v and -12v to run. I used the 7805, 7812 and the - HF7912 voltage regulators to get my voltages, but you can use - HFyour favorite regulator. Just be sure to have enough filter - HFcapacitance on the input and enough heat sink on the - HFregulators. There is nothing worse than intermittent - HFproblems when things get hot and heavy. Also note, the - HFsignal ground from the async adapter, the special interface - HFground and the TU ground should all be tied together. - HFDue to popular demand, I have also included a schematic - HFusing the 1488 and 1489 which should be readily available at - HFRadio Shack. - 3.0 INTERFACE INFORMATION 15 HF - IBM PC RTTY Ver 1.1 - GE-3.3 KANTRONICS RS-232C INTERFACE SCHEMATICHF- - HF +5v - HF 3 - HF ZDDDDDDDDDD? 3 - HF D41 CD 3 ZDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD CWID - HF D4 CDDY 3 - HF D4 CD 3 ZDDDDDDDDDDDDDDDDDDDDDDDD KEYIN - HFDTR DDDDDDDDD4 CDDDDY 3 ZDDDDDDDDDD? - HFTx data DDDDD4 CDDDD? CDD41 CD +5v - HFRTS DDDDDDDDD4 CDDDDDDDDDDDDDDDDDDDADD4 CDDDBDDDBDD DECOD E - HF D4 75154 CD 3 ZDD4 CDDDY 3 - HF Gnd D4 CDD? 3 @DD4 CDDDDD? 3 - HF @DDDDDDDDDDY 3 3 ZDDDDDDD4 CDDD? 3 3 - HF ZDDDDDDDDDDDDDDDDY 3 3ZDDDDDD4 74LS00 CDDD4 3 3 - HF 3 3 33 Gnd D4 CD? 3 3 3 - HF 3 3 33 @DDDDDDDDDDY 3 3 3 3 - HF 3 3 33 3 3 3 3 - HF 3 3 3@DDDDDDDDDDDDDDDDDDDDDDDDDDDD RTTY - HF 3 @DDDDDDDDDDDDDDDDDDDDDDD? 3 3 3 3 - HF ZDDDDDDDDDDDDDDDDDDDDDDDDDDDDD? 3 /oDDDDDDDDY 3 3 - HF 3 3 3 @DDDDDDDDDDDo| 3 3 3 - HF 3 3 3 |oDDDDDDY 3 3 - HF 3 3 ZDDDDDDDDDD? 3 | 3 3 - HF 3 @DD41 CD +12v 3 /oDDDDDDDDDDDDY - HF CDDDDDD4 CDDDDDDDDD? @DDDDDDDDDDDDDDo 3 - HF @DDDDDD4 75150 CDDDDDDD? 3 oDDDDDDDDDDY - HF Gnd D4 CD -12v 3 3 - HF @DDDDDDDDDDY 3 3 Normal/Reverse - HF 3 3 DPDT switch shown - HFRx data DDDDDDDDDDDDDDDDDDDDDDDDY 3 in normal position - HFCD DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDY - HFGnd DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD Gnd - HFComputer Kantronics - HFInterface Interface - HF 3 - HFNote: Non-Intersections are indicated by DDD - HF 3 - HF All grounds are connected together. - HF An IBM Graphics Printer is required for this schematic - HF to print correctly. - HF Kantronics RS-232C Interface - 3.0 INTERFACE INFORMATION 16 HF - IBM PC RTTY Ver 1.1 - HFDTR DDDDDDDDDDDDDDDDDDDDDDDDDDDD? - HF 3 - HF ZDDDDDDDDDD? +5v 3 - HFTx data DDDDD41 CDDY 3 ZDDDDDDDDDDDDDDDDDDDDDDDDDDDDD CWID - HF D4 CDDDDDDDY 3 - HF ZDDDDDD4 CD 3 ZDDDDDDDDDDDDDDDDDDDDDDDD KEYIN - HFRTS DDDDDDDDD4 CDDDDDDDDDDDDDDY 3 ZDDDDDDDDDD? - HF ZDDDDY D4 CD CDD41 CD +5v - HF 3 ZDDDDDD4 1489 CD ZDDDDDDDDDDDDADD4 CDDDBDDDBDD DECOD E - HF 3 3 Gnd D4 CD 3 ZDD4 CDDDY 3 - HF 3 3 @DDDDDDDDDDY 3 @DD4 CDDDDD? 3 - HF 3 3 3 ZDDDDDDD4 CDDD? 3 3 - HF 3 3 3 3ZDDDDDD4 74LS00 CDDD4 3 3 - HF 3 @DDDDDDDDDDDDDDDDDDDDDDDDY 33 Gnd D4 CD? 3 3 3 - HF 3 33 @DDDDDDDDDDY 3 3 3 3 - HF 3 33 3 3 3 3 - HF 3 3@DDDDDDDDDDDDDDDDDDDDDDDDDDDD RTTY - HF @DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD? 3 3 3 3 - HF ZDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD? 3 /oDDDDDDDDY 3 3 - HF 3 3 @DDDDDDDDDDDo| 3 3 3 - HF 3 3 |oDDDDDDY 3 3 - HF 3 ZDDDDDDDDDD? 3 | 3 3 - HF 3 -12v D41 CD +12v 3 /oDDDDDDDDDDDDY - HF @DDDDDDDDD4 CDDDDDDDDDDDADDDDDDDDDDDDDDo 3 - HFRx data DDDDD4 CD oDDDDDDDDDDY - HF D4 CDDDDD? - HF D4 CD 3 Normal/Reverse - HF D4 1488 CD 3 DPDT switch shown - HF Gnd D4 CD 3 in normal position - HF @DDDDDDDDDDY 3 - HFCD DDDDDDDDDDDDDDDDDDDDDDDDDDDY - HFGnd DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD Gnd - HFComputer Kantronics - HFInterface Interface - HF 3 - HFNote: Non-Intersections are indicated by DDD - HF 3 - HF All grounds are connected. - HF An IBM Graphics Printer is required for this schematic - HF to print correctly. - HF Kantronics RS-232C Interface - 3.0 INTERFACE INFORMATION 17 HF ACBHFT2C Interface - 3.0 INTERFACE INFORMATION 17