diff --git a/cores/c64/rtl/fpga64_sid_iec.vhd b/cores/c64/rtl/fpga64_sid_iec.vhd
index 5e9d7db..0841761 100644
--- a/cores/c64/rtl/fpga64_sid_iec.vhd
+++ b/cores/c64/rtl/fpga64_sid_iec.vhd
@@ -678,7 +678,7 @@ div1m: process(clk32)				-- this process devides 32 MHz to 1MHz (for the SID)
 			do => cpuDo,
 			we => cpuWe,
 			
-			diIO => "00010111",
+			diIO => cpuIO(7) & cpuIO(6) & "01" & cpuIO(3) & "111",
 			doIO => cpuIO
 		);