Int 21 Fn 3701  - DOS 2+ - "switchar" - Set Switch Character               [D]

   AX = 3701h
   DL = new switch character

Return: AL = status
       00h successful
       FFh unsupported subfunction

Notes: documented in some OEM versions of some releases of DOS
   supported by OS/2 compatibility box
   ignored by MS-DOS 5+ and DR-DOS 3.41+; DR-DOS 6.0 leaves AX unchanged

See Also: AX=3700h