Mega Code Archive

 
Categories / Delphi / Examples
 

Reading-writing ports in delphi

In the old days writing to ports on your computer was easy; all you had to do was use the port[ n ] command. Delphi no longer supports the port[ n ] command, so you have to use functions like: function ReadPortB( wPort : Word ) : Byte; begin asm mov dx, wPort in al, dx mov result, al end; end; procedure WritePortB( wPort : Word; bValue : Byte ); begin asm mov dx, wPort mov al, bValue out dx, al end; end;