Int E0  - Real/32 - "c_read" - Fetch Character From The Default Console    [O]

   CL = 01h

Return: AX = character
   may destroy SI,DI???

Notes: this function echos the character to the screen, expanding Tab
     characters to the next multiple of eight columns; Ctrl-C is
     ignored if the calling process can not terminate
   the calling process is suspended until a character is available; if
     the caller does not own the console, it is suspended until it
     can attach to the console

See Also: INT E0/CL=02h,INT E0/CL=06h,INT 21/AH=01h