diff --git a/src/mame/drivers/ut88.cpp b/src/mame/drivers/ut88.cpp
index 4c5b49c7754..85e51348cbf 100644
--- a/src/mame/drivers/ut88.cpp
+++ b/src/mame/drivers/ut88.cpp
@@ -154,24 +154,24 @@ INPUT_PORTS_END
 
 static INPUT_PORTS_START( ut88mini )
 	PORT_START("LINE0")
-	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYPAD) PORT_CODE(KEYCODE_0)
-	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYPAD) PORT_CODE(KEYCODE_1)
-	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYPAD) PORT_CODE(KEYCODE_2)
-	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYPAD) PORT_CODE(KEYCODE_3)
-	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYPAD) PORT_CODE(KEYCODE_4)
-	PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYPAD) PORT_CODE(KEYCODE_5)
-	PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYPAD) PORT_CODE(KEYCODE_6)
-	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYPAD) PORT_CODE(KEYCODE_7)
+	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYPAD) PORT_CODE(KEYCODE_0) PORT_CHAR('0')
+	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYPAD) PORT_CODE(KEYCODE_1) PORT_CHAR('1')
+	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYPAD) PORT_CODE(KEYCODE_2) PORT_CHAR('2')
+	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYPAD) PORT_CODE(KEYCODE_3) PORT_CHAR('3')
+	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYPAD) PORT_CODE(KEYCODE_4) PORT_CHAR('4')
+	PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYPAD) PORT_CODE(KEYCODE_5) PORT_CHAR('5')
+	PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYPAD) PORT_CODE(KEYCODE_6) PORT_CHAR('6')
+	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYPAD) PORT_CODE(KEYCODE_7) PORT_CHAR('7')
 
 	PORT_START("LINE1")
-	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYPAD) PORT_CODE(KEYCODE_8)
-	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYPAD) PORT_CODE(KEYCODE_9)
-	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYPAD) PORT_CODE(KEYCODE_A)
-	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYPAD) PORT_CODE(KEYCODE_B)
-	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYPAD) PORT_CODE(KEYCODE_C)
-	PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYPAD) PORT_CODE(KEYCODE_D)
-	PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYPAD) PORT_CODE(KEYCODE_E)
-	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYPAD) PORT_CODE(KEYCODE_F)
+	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYPAD) PORT_CODE(KEYCODE_8) PORT_CHAR('8')
+	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYPAD) PORT_CODE(KEYCODE_9) PORT_CHAR('9')
+	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYPAD) PORT_CODE(KEYCODE_A) PORT_CHAR('A')
+	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYPAD) PORT_CODE(KEYCODE_B) PORT_CHAR('B')
+	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYPAD) PORT_CODE(KEYCODE_C) PORT_CHAR('C')
+	PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYPAD) PORT_CODE(KEYCODE_D) PORT_CHAR('D')
+	PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYPAD) PORT_CODE(KEYCODE_E) PORT_CHAR('E')
+	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYPAD) PORT_CODE(KEYCODE_F) PORT_CHAR('F')
 
 	PORT_START("LINE2")
 	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYPAD) PORT_NAME("Backspace") PORT_CODE(KEYCODE_BACKSPACE)