//Copyright(c) 1998 Zolotarenko P.V pvz@mail.univ.kiev.ua
unit Ports;
interface
type
TPort = class
private
procedure Set_(index_: word; value: byte); register;
function Get_(index_: word): byte; register;
public
property Element[index_: word]: byte read Get_ write Set_; default;
end;
TPortW = class
private
procedure Set_(index_: word; value: Word); register;
function Get_(index_: word): word; register;
public
property Element[index_: word]: word read Get_ write Set_; default;
end;
var
Port: TPort;
PortW: TportW;
implementation
procedure TPort.Set_(index_: word; value: byte);
begin
asm
mov dx,index_
mov al,value
out dx,al
end;
end;
function TPort.Get_(index_: word): byte;
begin
asm
mov dx,index_
in al,dx
mov @Result,al
end;
end;
procedure TPortW.Set_(index_: word; value: word);
begin
asm
mov dx,index_
mov ax,value
out dx,ax
end;
end;
function TPortW.Get_(index_: word): word;
begin
asm
mov dx,index_
in ax,dx
mov @Result,ax
end;
end;
initialization
Port := TPort.Create;
PortW := TPortW.Create;
finalization
Port.free;
PortW.free;
end.
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