diff --git a/converter/ibm4704_usb/config.h b/converter/ibm4704_usb/config.h
index 812d95c6..4f267b3b 100644
--- a/converter/ibm4704_usb/config.h
+++ b/converter/ibm4704_usb/config.h
@@ -41,9 +41,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 
 
-/*
- * Busywait
- */
+/* Pin configuration */
 #define IBM4704_CLOCK_PORT  PORTD
 #define IBM4704_CLOCK_PIN   PIND
 #define IBM4704_CLOCK_DDR   DDRD
@@ -53,19 +51,10 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define IBM4704_DATA_DDR    DDRD
 #define IBM4704_DATA_BIT    0
 
-/*
- * Pin interrupt
- */
-#define IBM4704_INT_INIT()  do {    \
-    EICRA |= ((1<<ISC11) |      \
-              (0<<ISC10));      \
-} while (0)
-#define IBM4704_INT_ON()  do {      \
-    EIMSK |= (1<<INT1);         \
-} while (0)
-#define IBM4704_INT_OFF() do {      \
-    EIMSK &= ~(1<<INT1);        \
-} while (0)
+/* Pin interrupt on  rising edge */
+#define IBM4704_INT_INIT()  do { EICRA |= ((1<<ISC11)|(0<<ISC10)); } while (0)
+#define IBM4704_INT_ON()    do { EIMSK |=  (1<<INT1); } while (0)
+#define IBM4704_INT_OFF()   do { EIMSK &= ~(1<<INT1); } while (0)
 #define IBM4704_INT_VECT    INT1_vect
 
 
diff --git a/converter/ibm4704_usb/matrix.c b/converter/ibm4704_usb/matrix.c
index 857dea0f..5f928d71 100644
--- a/converter/ibm4704_usb/matrix.c
+++ b/converter/ibm4704_usb/matrix.c
@@ -86,7 +86,7 @@ static void enable_break(void)
 
 void matrix_init(void)
 {
-    debug_enable = false;
+    debug_enable = true;
 
     ibm4704_init();
     matrix_clear();
diff --git a/tmk_core/protocol/ibm4704.c b/tmk_core/protocol/ibm4704.c
index 152d7e61..a10a5e74 100644
--- a/tmk_core/protocol/ibm4704.c
+++ b/tmk_core/protocol/ibm4704.c
@@ -180,7 +180,7 @@ ISR(IBM4704_INT_VECT)
 ERROR:
     ibm4704_error = state;
     while (ibm4704_send(0xFE)) _delay_ms(1); // resend
-    xprintf("R:%02X\n", data);
+    xprintf("R:%02X%02X\n", state, data);
 DONE:
     state = INIT;
     data = 0;