diff --git a/jtag/ChangeLog b/jtag/ChangeLog
index ed62bac2..d0681b5c 100644
--- a/jtag/ChangeLog
+++ b/jtag/ChangeLog
@@ -1,3 +1,17 @@
+2003-01-30  Marcel Telka  <marcel@telka.sk>
+
+	* src/tap/cable/byteblaster.c (byteblaster_init): Added support for
+		parallel ports with I/O addresses above 0x3FF.
+	(byteblaster_done): Ditto.
+	* src/tap/cable/dlc5.c (dlc5_init): Ditto.
+	(dlc5_done): Ditto.
+	* src/tap/cable/ea253.c (ea253_init): Ditto.
+	(ea253_done): Ditto.
+	* src/tap/cable/ei012.c (ei012_init): Ditto.
+	(ei012_done): Ditto.
+	* src/tap/cable/wiggler.c (wiggler_init): Ditto.
+	(wiggler_done): Ditto.
+
 2003-01-19  Marcel Telka  <marcel@telka.sk>
 
 	* configure.ac: Added AC_GNU_SOURCE.
diff --git a/jtag/NEWS b/jtag/NEWS
index 5f3ab4f1..9a964adb 100644
--- a/jtag/NEWS
+++ b/jtag/NEWS
@@ -2,6 +2,7 @@ $Id$
 
 	* Added new manufacturer: Cypress. (patch 669157, Chris Ellec)
 	* Added new 'frequency' command to limit maximum TCK frequency
+	* Added support for parallel ports with I/O addresses above 0x3FF
 
 jtag-0.2.1 (2003-01-13):
 
diff --git a/jtag/src/tap/cable/byteblaster.c b/jtag/src/tap/cable/byteblaster.c
index a59f9294..2fabd73e 100644
--- a/jtag/src/tap/cable/byteblaster.c
+++ b/jtag/src/tap/cable/byteblaster.c
@@ -59,13 +59,16 @@ byteblaster_init( unsigned int aport )
 {
 	tap_state_init();
 	port = aport;
-	return !ioperm( port, 2, 1 );
+	return !(((port + 2 <= 0x400) && ioperm( port, 2, 1 )) || ((port + 2 > 0x400) && iopl( 3 )));
 }
 
 static void
 byteblaster_done( void )
 {
-	ioperm( port, 2, 0 );
+	if (port + 2 <= 0x400)
+		ioperm( port, 2, 0 );
+	else
+		iopl( 0 );
 
 	tap_state_done();
 }
diff --git a/jtag/src/tap/cable/dlc5.c b/jtag/src/tap/cable/dlc5.c
index 5a5fb946..81aa72a2 100644
--- a/jtag/src/tap/cable/dlc5.c
+++ b/jtag/src/tap/cable/dlc5.c
@@ -59,13 +59,16 @@ dlc5_init( unsigned int aport )
 {
 	tap_state_init();
 	port = aport;
-	return !ioperm( port, 2, 1 );
+	return !(((port + 2 <= 0x400) && ioperm( port, 2, 1 )) || ((port + 2 > 0x400) && iopl( 3 )));
 }
 
 static void
 dlc5_done( void )
 {
-	ioperm( port, 2, 0 );
+	if (port + 2 <= 0x400)
+		ioperm( port, 2, 0 );
+	else
+		iopl( 0 );
 
 	tap_state_done();
 }
diff --git a/jtag/src/tap/cable/ea253.c b/jtag/src/tap/cable/ea253.c
index 28c3ac01..6e7d644b 100644
--- a/jtag/src/tap/cable/ea253.c
+++ b/jtag/src/tap/cable/ea253.c
@@ -52,7 +52,7 @@ ea253_init( unsigned int aport )
 {
 	tap_state_init();
 	port = aport;
-	if (ioperm( port, 2, 1 ))
+	if (((port + 2 <= 0x400) && ioperm( port, 2, 1 )) || ((port + 2 > 0x400) && iopl( 3 )))
 		return 0;
 	tap_state_set_trst( (inb( port ) >> TRST) & 1 );
 
@@ -62,7 +62,10 @@ ea253_init( unsigned int aport )
 static void
 ea253_done( void )
 {
-	ioperm( port, 2, 0 );
+	if (port + 2 <= 0x400)
+		ioperm( port, 2, 0 );
+	else
+		iopl( 0 );
 
 	tap_state_done();
 }
diff --git a/jtag/src/tap/cable/ei012.c b/jtag/src/tap/cable/ei012.c
index 74474cad..d1317698 100644
--- a/jtag/src/tap/cable/ei012.c
+++ b/jtag/src/tap/cable/ei012.c
@@ -53,7 +53,7 @@ ei012_init( unsigned int aport )
 {
 	tap_state_init();
 	port = aport;
-	if (ioperm( port, 2, 1 ))
+	if (((port + 2 <= 0x400) && ioperm( port, 2, 1 )) || ((port + 2 > 0x400) && iopl( 3 )))
 		return 0;
 	tap_state_set_trst( (inb( port ) >> TRST) & 1 );
 
@@ -63,7 +63,10 @@ ei012_init( unsigned int aport )
 static void
 ei012_done( void )
 {
-	ioperm( port, 2, 0 );
+	if (port + 2 <= 0x400)
+		ioperm( port, 2, 0 );
+	else
+		iopl( 0 );
 
 	tap_state_done();
 }
diff --git a/jtag/src/tap/cable/wiggler.c b/jtag/src/tap/cable/wiggler.c
index 1b9b6aa6..b9a7c86e 100644
--- a/jtag/src/tap/cable/wiggler.c
+++ b/jtag/src/tap/cable/wiggler.c
@@ -56,7 +56,7 @@ wiggler_init( unsigned int aport )
 {
 	tap_state_init();
 	port = aport;
-	if (ioperm( port, 2, 1 ))
+	if (((port + 2 <= 0x400) && ioperm( port, 2, 1 )) || ((port + 2 > 0x400) && iopl( 3 )))
 		return 0;
 	tap_state_set_trst( (inb( port ) >> TRST) & 1 );
 
@@ -66,7 +66,10 @@ wiggler_init( unsigned int aport )
 static void
 wiggler_done( void )
 {
-	ioperm( port, 2, 0 );
+	if (port + 2 <= 0x400)
+		ioperm( port, 2, 0 );
+	else
+		iopl( 0 );
 
 	tap_state_done();
 }