CTTY--Notes

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.