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...write data to the printer port?
Autor: Ramon Schenkel
[ Print tip ]  

Tip Rating (4):  
     


procedure Out32(portadresse: Word; wert: Byte);
var
  
val: Byte;
begin
  
val := Byte(wert);
  asm
    
push dx
    mov dx,portadresse
    mov al,val
    out dx,al
    pop dx
  end;
end;

function Inp32(portadresse: Word): Byte;
var
  
val: Byte;
begin
  asm
    
push dx
    mov dx,portadresse
    in al,dx
    mov val,al
    pop dx
  end;
  Inp32 := Byte(val) and $00ff;
end;


// Example/Beispiel:

  
Out32($378, 0)  {= Dataport all 8 Bit Low}
  
Out32($378, (Inp32($378) or 1); {Dataport Bit 1 High}
  
Out32($378, (Inp32($378) and 254);  {Datap. Bit 1, Low}


 

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