diff --git a/jtag/ChangeLog b/jtag/ChangeLog
index f1149601..392537aa 100644
--- a/jtag/ChangeLog
+++ b/jtag/ChangeLog
@@ -1,3 +1,9 @@
+2003-06-10  Marcel Telka  <marcel@telka.sk>
+
+	* src/bus/sh7727.c (bus_params_t): Added md3 and md4.
+	(sh7727_bus_width): Moved to implementation using MD3 and MD4 (thanks to Rainer Dörken).
+	(new_sh7727_bus): Added MD3 and MD4 signal searching (thanks to Rainer Dörken).
+
 2003-06-10  Marcel Telka  <marcel@telka.sk>
 
 	* src/bus/ixp425.c (ixp425_bus_width): Changed return value type (int -> unsigned int).
diff --git a/jtag/NEWS b/jtag/NEWS
index c385034f..2bfee255 100644
--- a/jtag/NEWS
+++ b/jtag/NEWS
@@ -3,6 +3,8 @@ $Id$
 	* Fixed bug with SELECT, AUTOFD, and STROBE signals handling (bug 745824).
 	* Added new commands 'peek' and 'poke' (patch 747447, Matan Ziv-Av).
 	* Fixed bugs in SH7727 bus driver (thanks to Rainer Dörken).
+	* Added bus width detection using MD3 and MD4 signals in SH7727 bus driver
+		(thanks to Rainer Dörken).
 	* Minor bugs fixed.
 
 jtag-0.4 (2003-05-29):
diff --git a/jtag/src/bus/sh7727.c b/jtag/src/bus/sh7727.c
index 94b8020d..86a1e5e6 100644
--- a/jtag/src/bus/sh7727.c
+++ b/jtag/src/bus/sh7727.c
@@ -43,6 +43,8 @@ typedef struct {
 	signal_t *we[4];
 	signal_t *rdwr;
 	signal_t *rd;
+	signal_t *md3;
+	signal_t *md4;
 } bus_params_t;
 
 #define	CHAIN	((bus_params_t *) bus->params)->chain
@@ -53,6 +55,8 @@ typedef struct {
 #define	WE	((bus_params_t *) bus->params)->we
 #define	RDWR	((bus_params_t *) bus->params)->rdwr
 #define	RD	((bus_params_t *) bus->params)->rd
+#define	MD3	((bus_params_t *) bus->params)->md3
+#define	MD4	((bus_params_t *) bus->params)->md4
 
 static void
 setup_address( bus_t *bus, uint32_t a )
@@ -216,7 +220,19 @@ sh7727_bus_write( bus_t *bus, uint32_t adr, uint32_t data )
 static unsigned int
 sh7727_bus_width( bus_t *bus, uint32_t adr )
 {
-	return 16;
+	part_t *p = PART;
+
+	switch (part_get_signal( p, MD4 ) << 1 | part_get_signal( p, MD3 )) {
+		case 1:
+			return 8;
+		case 2:
+			return 16;
+		case 3:
+			return 32;
+		default:
+			printf( _("Error: Invalid bus width (MD3 = MD4 = 0)!\n") );
+			return 0;
+	}
 }
 
 static void
@@ -312,6 +328,16 @@ new_sh7727_bus( chain_t *chain, int pn )
 		printf( _("signal '%s' not found\n"), "RD" );
 		failed = 1;
 	}
+	MD3 = part_find_signal( PART, "MD3" );
+	if (!MD3) {
+		printf( _("signal '%s' not found\n"), "MD3" );
+		failed = 1;
+	}
+	MD4 = part_find_signal( PART, "MD4" );
+	if (!MD4) {
+		printf( _("signal '%s' not found\n"), "MD4" );
+		failed = 1;
+	}
 
 	if (failed) {
 		free( bus->params );