Command-line Switches
Last modified on 19 Apr 2007

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Command-line Switches
LPT Port Pinning
The following switches can be used on the DOS command line when starting CT:

Video Switches
Switch Description
-L Laptop switch. Forces colors to be all black and white on a color monitor. Very useful on laptops.
-M MONO switch. Force the use of mono video hardware.
-VGA Use 50 line VGA mode (this in version 9 only).
COM/LPT Port Switches
Switch Description
-2 Make the COM3 address 3E0.
-AC Antenna Control. Enables control of antenna relays through Top Ten Devices controller.
-DIGI Use 8 port Digiboard on a single interrupt.
-LOOP Loop switch. Allow computer networks to use only one port to talk to two other machines.
-NC No Comm flag. Resets the com setup. After a contest, use this flag at the office where you have no radio.
-NOLPT Unconditionally turn off all LPT activity
-SHARED Use the 4 port MU440 card on a single interrupt.
-XT Tells CT to use PC/XT COM port addresses.
Miscellaneous Switches
Switch Description
-D Enables super check partial data.
-HP HP Printer Flag. When writing DUPE sheet to file, include HP PCL command codes to enable compressed printing.
-NOM NO Mult window. Don't create the by continent multiplier windows. Use this when memory is real tight.
-NOW NO Wait flag. Startup without stopping on the information sheet, i.e. go right to the logging screen.
-RESET RESET flag. Resets all colors and window positions to their default values.
Multi-Op Switches
Switch Description
-MO Mults Only. Multi-op only accepts QSOs with new multipliers from networked computers. Good when memory is scarce.
-NF No Frequency flag. Don't pass radio frequency changes around the network.
User-specific Switches
Switch Description
-FO AB6FO flag for single-operator, multi-transmitter use. Don't stop transmitting when a key is struck while in repeat mode.
-K1XM K1XM flag. Don't search your own log in super check partial. This is for slow laptops and large logs. In version 9 this switch is not needed, log search is 50 times faster than in version 8.
-LTA K4LTA flag. Announce band changes in Morse code. This is for blind ops like K4LTA.
-ON DL7ON style QTC's for use with a tape recorder.
-TT AA6TT flag. When a backspace results in an empty callsign field, clear all the fields.
Secret Switches
Switch Description
-LZ Send leading zeros
-S Enables secret features that are not documented or released yet.
 

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