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Sound in Delphi 2 and 3

Posted on 1998-07-02
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Last Modified: 2010-04-04
PAQ "sound in Delphi" solves the problem of simple sound generation only in Delphi 1.
This is because the predefined array Port[] is unknown to Delphi 2 and 3. Is there a way to
program sound also in Delphi 2 and 3 in the same manner?
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Question by:jslivka
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2 Comments
 
LVL 8

Accepted Solution

by:
ZifNab earned 50 total points
ID: 1357025
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.
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LVL 8

Expert Comment

by:ZifNab
ID: 1357026
Oops, sorry to say hello to you jslivka, so Hello jslivka (hope you forgive me). Zif.
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