diff --git a/src/lpt.c b/src/lpt.c
index 73cd3ce6d..eb25900af 100644
--- a/src/lpt.c
+++ b/src/lpt.c
@@ -61,32 +61,50 @@ uint16_t lpt_addr[2] = { 0x378, 0x278 };
 
 void lpt_init()
 {
-        io_sethandler(0x0378, 0x0003, lpt1_read, NULL, NULL, lpt1_write, NULL, NULL,  NULL);
-        io_sethandler(0x0278, 0x0003, lpt2_read, NULL, NULL, lpt2_write, NULL, NULL,  NULL);
-	lpt_addr[0] = 0x378;
-	lpt_addr[1] = 0x278;
+	if (lpt_enabled)
+	{
+	        io_sethandler(0x0378, 0x0003, lpt1_read, NULL, NULL, lpt1_write, NULL, NULL,  NULL);
+        	io_sethandler(0x0278, 0x0003, lpt2_read, NULL, NULL, lpt2_write, NULL, NULL,  NULL);
+		lpt_addr[0] = 0x378;
+		lpt_addr[1] = 0x278;
+	}
 }
 
 void lpt1_init(uint16_t port)
 {
-        io_sethandler(port, 0x0003, lpt1_read, NULL, NULL, lpt1_write, NULL, NULL,  NULL);
-	lpt_addr[0] = port;
+	if (lpt_enabled)
+	{
+	        io_sethandler(port, 0x0003, lpt1_read, NULL, NULL, lpt1_write, NULL, NULL,  NULL);
+		lpt_addr[0] = port;
+	}
 }
 void lpt1_remove()
 {
-        io_removehandler(lpt_addr[0], 0x0003, lpt1_read, NULL, NULL, lpt1_write, NULL, NULL,  NULL);
+	if (lpt_enabled)
+	{
+	        io_removehandler(lpt_addr[0], 0x0003, lpt1_read, NULL, NULL, lpt1_write, NULL, NULL,  NULL);
+	}
 }
 void lpt2_init(uint16_t port)
 {
-        io_sethandler(port, 0x0003, lpt2_read, NULL, NULL, lpt2_write, NULL, NULL,  NULL);
-	lpt_addr[1] = port;
+	if (lpt_enabled)
+	{
+	        io_sethandler(port, 0x0003, lpt2_read, NULL, NULL, lpt2_write, NULL, NULL,  NULL);
+		lpt_addr[1] = port;
+	}
 }
 void lpt2_remove()
 {
-        io_removehandler(lpt_addr[1], 0x0003, lpt2_read, NULL, NULL, lpt2_write, NULL, NULL,  NULL);
+	if (lpt_enabled)
+	{
+	        io_removehandler(lpt_addr[1], 0x0003, lpt2_read, NULL, NULL, lpt2_write, NULL, NULL,  NULL);
+	}
 }
 
 void lpt2_remove_ams()
 {
-        io_removehandler(0x0379, 0x0002, lpt2_read, NULL, NULL, lpt2_write, NULL, NULL,  NULL);
+	if (lpt_enabled)
+	{
+	        io_removehandler(0x0379, 0x0002, lpt2_read, NULL, NULL, lpt2_write, NULL, NULL,  NULL);
+	}
 }
diff --git a/src/serial_old.c b/src/serial_old.c
index 7dbb3e928..a195c310e 100644
--- a/src/serial_old.c
+++ b/src/serial_old.c
@@ -286,6 +286,10 @@ void serial_setup(int port, uint16_t addr, int irq)
 	switch(port)
 	{
 		case 1:
+			if (!serial_enabled[0])
+			{
+				return;
+			}
 			if (base_address[0] != 0x0000)
 			{
 				serial_remove(port);
@@ -298,6 +302,10 @@ void serial_setup(int port, uint16_t addr, int irq)
 			serial1.irq = irq;
 			break;
 		case 2:
+			if (!serial_enabled[1])
+			{
+				return;
+			}
 			if (base_address[1] != 0x0000)
 			{
 				serial_remove(port);