Sound in Delphi 2 and 3

It's possible to get simple sound, but with other commands :

procedure Sound(Freq : Word);
var
    B : Byte;
begin
    if Freq > 18 then
        begin
            Freq := Word(1193181 div LongInt(Freq));
            B := Byte(GetPort($61));

            if (B and 3) = 0 then
               begin
                   SetPort($61, Word(B or 3));
                   SetPort($43, $B6);
               end;

            SetPort($42, Freq);
            SetPort($42, Freq shr 8);
        end;
end;

procedure NoSound;
var
  Value: Word;
begin
    Value := GetPort($61) and $FC;
    SetPort($61, Value);
end;

procedure SetPort(address, Value:Word);
var
  bValue: byte;
begin
  bValue := trunc(Value and 255);
  asm
    mov dx, address
    mov al, bValue
    out dx, al
  end;
end;

function GetPort(address:word):word;
var
  bValue: byte;
begin
  asm
    mov dx, address
    in al, dx
    mov bValue, al
  end;
  GetPort := bValue;
end;

This should work on D2,3, 4?
Zif.