                                    CTTY
        Changes the standard console device to an auxiliary device.

CTTY changes the standard input and output device to an auxiliary
device, or restores the keyboard and screen as the standard input and
output devices.

COMMAND TYPE: Internal                  VERSION: 2.0 and up

USE: CTTY device

The available devices are:
  AUX:  ASYNCHRONOUS PORT   COM1: ASYNCHRONOUS PORT
  COM2: ASYNCHRONOUS PORT   CON:  KEYBOARD INPUT and SCREEN OUTPUT

EXAMPLE: CTTY COM1
After this command is performed, all standard input and output will be
sent to and taken from the primary asynchronous port.
