DOS Fn 07H: No Echo Unfiltered Console Input

                                                         Compatibility: 1.0+ 
 Expects: AH    07H
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 Returns: AL    character fetched from the Standard Input
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    Info: Reads (waits for) a character from the Standard Input Device,
          returning that character in AL.  The character is not displayed.

   Notes: ■ Does not check for Ctrl-Break.
          ■ Call twice for Extended ASCII.
          ■ Use Fn 0bH to check status before calling (if you don't want to
            wait for a key).

See Also: Character I/O Functions
          DOS Functions
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