Int 21 Fn 07  - Dos 1+ - Direct Character Input, Without Echo              [D]

   AH = 07h

Return: AL = character read from standard input

Notes: does not check ^C/reak
   standard input is always the keyboard under DOS 1.x, but may be
     redirected under DOS 2+
   if the interim console flag is set (see AX=6301h), partially-formed
     double-byte characters may be returned

See Also: AH=01h,AH=06h,AH=08h,AH=0Ah