MODULE first; 

  FROM Sounds IMPORT Sound, NoSound;
  FROM Delay IMPORT Delay;
  FROM TTextIO
    IMPORT ReadInt, ReadCard, ReadChar, ReadString, ReadLn, ReadBuffer,
    WriteInt, WriteCard, WriteChar, WriteString, WriteBool, WriteLn,
    Eoln, SeekEof, SeekEoln;
  FROM TKernelIO
    IMPORT File, FileType, OptionMode,
    StatusProc, ReadProc, WriteProc, ErrorProc,
    stdinout, input, output, con, trm, kbd, lst, aux, usr,
    conStPtr, conInPtr, auxInPtr, usrInPtr, conOutPtr, lstOutPtr,
    auxOutPtr, usrOutPtr, errorPtr, IOresult, KeyPressed, IOBuffer,
    IOCheck, DeviceCheck, CtrlC, InputFileBuffer,  OutputFileBuffer;


(* Program to demonstrate simple constant translation *) 




  CONST 
    Version = 1; 
    SubVersion = 0; 
    Product = 'Turbo Translator'; 
    Bell = 7C; (* Bell hex code *) 




  PROCEDURE Siren; 

    VAR 

      Frequency: INTEGER; 
  BEGIN 
    FOR Frequency := 500 TO 2000 DO 

      Delay(1); 
      Sound(Frequency); 
    END; 
    FOR Frequency := 2000 TO 500 BY -1 DO 

      Delay(1); 
      Sound(Frequency); 
    END; 
    NoSound; 
  END Siren; 

BEGIN 
  WriteLn(stdinout); 
  WriteLn(stdinout); 
  WriteString(stdinout, 'Welcome to ', 0); 
  WriteString(stdinout, Product, 0); 
  WriteString(stdinout, ' version ', 0); 
  WriteInt(stdinout, Version, 0); 
  WriteChar(stdinout, '.', 0); 
  WriteInt(stdinout, SubVersion, 0); 
  WriteLn(stdinout); 
  WriteString(stdinout, Bell, 0); 
  WriteString(stdinout, Bell, 0); 
  WriteString(stdinout, Bell, 0); 
  WriteString(stdinout, Bell, 0); 
  WriteLn(stdinout); 
  WriteString(stdinout, "The Programmers' time saver", 0); 
  WriteLn(stdinout); 
  Siren; 
END first.