MS DOS Command: CTTY

Changes the terminal device used to control your computer.

Use the CTTY command if you want to use another device to enter commands.

Description

Allocates memory for a specified number of disk buffers when your system starts. You can use this command only in your CONFIG.SYS file.

Syntax

CTTY device

Parameters

device

Specifies the alternative device you want to use to type MS-DOS commands. Valid values for the device parameter are PRN, LPT1, LPT2, LPT3, CON, AUX, COM1, COM2, COM3, and COM4.

Related Command

For more information about changing the input device when specifying a command interpreter, see the COMMAND command.

Remarks

Setting up a serial port for CTTY

Use the MODE command to set up your serial port for baud rate, parity, bits, and stop bit before using the CTTY command.

Using CTTY with programs that do not use MS-DOS

Many programs do not use MS-DOS for input or output. These programs send input directly to the hardware on your computer. The CTTY command has no effect on these programs; it affects only programs that use MS-DOS for reading keyboard input and displaying output.

Setting the terminal device with COMMAND

In addition to the CTTY command, you can use the device parameter of the COMMAND command to specify the input device.

Examples

To change control of all input and output from the current device (your computer monitor and keyboard) to the AUX port, type the following at the command prompt:

ctty aux

In this example, a remote terminal device connected to the AUX port controls input and output for your system.

To transfer input and output back to the monitor and keyboard, type the following command at the remote terminal:

ctty con