program Reverse;

var
  hexValue, x, r: Int64;
//***********************************************************************  
 //Не знаю как с этим компилятором вывести hex 
 //для вывода эта функция
function IntToHex(Value: Int64): string;
var pos:integer;
    HexChars:string;
    Result:string;
begin 
Result:='';
while Value>0 do
  begin
   HexChars := '0123456789ABCDEF';
   pos:=Value mod $10;
   Result := HexChars[pos + 1] + Result;
   Value:=Value div $10;
  end;
  IntToHex:= Result;
end;
//************************************************************************
// программа  реверс
begin
  hexValue := $2300FFC0;// Оставим исходное число для вывода, по желанию
  x:= hexValue;
  r := 0;
  while x > 0 do 
  begin
    r := r * $100 + (x mod $100); // остаток от деления прибавляем к перевертышу 
    x := x div $100; 
  end;
  writeln('hexValue  ',IntToHex(hexValue));
  writeln('Reverse   ',IntToHex(r));


end. 

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