Museum

     Name
          outp, outpw - Write to a specified output port.

     Syntax
          #include <conio.h>

          int outp(port, byte)
          unsigned outpw(port, word)
          unsigned port;
          int byte;
          unsigned word;

     Description
          The outp and outpw functions write a byte and a word,
          respectively, to the specified output port. The port
          argument can be any unsigned integer in the range 0 -
          65,535; byte can be any integer in the range 0 - 255; and
          word can be any value in the range 0 - 65,535.

          Both outp and outpw are supported in the OS/2 compatibility
          box.  If you use these functions, you must also use a .DEF
          file to declare the IOSEG segment the run-time library uses
          to perform input/output on the port. In addition, the
          intrinsic (/Oi) versions of these functions do not work
          unless you put the code in a segment that is marked with the
          IOPL keyword in the

     Return Value
          The functions return the data output. There is no error
          return.

     See Also
          inp(DOS), inpw(DOS)

     Example
          #include <conio.h> #include <stdio.h>

          int port, byte_val;
          main()
           {
                  port = 1;
                  byte_val = 3;
                  outp(port,byte_val);
                  printf("The value %d has been output to port %d",
                          byte_val, port);
           }

          This program uses outp to write the value 3 to output port
          1.
                                                (printed 6/18/89)