DOS Fn 4bH: Load or Execute a program

     See: Fn 4b00H (load and execute a program)

          Fn 4b01H (load a program, but don't execute)

          Fn 4b03H (load an overlay)

          Fn 4b05H (set execution state)  DOS 5.0+

See Also: Process Control Functions
          Program Startup & Exit
          DOS Functions
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