INT 16h,  05h (5)        Keyboard Write                                  many

    Puts a scan code/character code combination in the keyboard buffer.

       On entry:      AH         05h
                      CH         Scan code
                      CL         ASCII character code

       Returns:       AL         00h - Operation successful
                                 01h - Buffer full

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       Notes:         This service is available only for ATs dated
                      11/15/85 and after, and XT 286s.

                      This service "fools" a program into thinking that
                      keys have come from the keyboard. A good example of
                      this would be the operation needed by a program that
                      implements keyboard macros.

                      For a description and list of scan codes, see "Scan
                      Codes."