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 DOORWAY MODE

 Pressing Alt-= while in Terminal Mode will toggle DOORWAY mode
 on/off. DOORWAY mode is used by the DOORWAY utility, and sev-
 eral other applications. While in DOORWAY mode, when a key is
 pressed Telix simply sends its raw scan code out the serial
 port, as returned by the PC's BIOS keyboard function. Note
 that since for any key except Alt-=, Telix just sends the
 value to the serial port, you must first switch out of DOORWAY
 mode to perform any Telix function.