Int 21 Fn 08  - DOS 1+ - Character Input Without Echo                      [D]

   AH = 08h

Return: AL = character read from standard input

Notes:  Break are checked, and INT 23 executed if detected
   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=07h,AH=0Ah,AH=64h