Int 15 Fn 85  C - OS Hook - Sysrq Key Activity (at,ps)                     [B]

   AH = 85h
   AL = 00h SysRq key pressed
      = 01h SysRq key released
   CF clear

Return: CF clear if successful
       AH = 00h
   CF set on error
       AH = status (see AH=84h)

Notes: called by keyboard decode routine
   the default handler simply returns successfully; programs which wish
     to monitor the SysRq key must hook this call

See Also: INT 09