diff --git a/src/mame/drivers/mpu4.c b/src/mame/drivers/mpu4.c
index 8d0f61f6ea8..ab1ae91d843 100644
--- a/src/mame/drivers/mpu4.c
+++ b/src/mame/drivers/mpu4.c
@@ -454,6 +454,11 @@ static WRITE8_HANDLER( bankswitch_w )
 	memory_set_bank(1,data & 0x07);
 }
 
+static READ8_HANDLER( bankswitch_r )
+{
+	return memory_get_bank(1);
+}
+
 // IC2 6840 PTM handler ///////////////////////////////////////////////////////
 
 static WRITE8_HANDLER( ic2_o1_callback )
@@ -1325,7 +1330,7 @@ static ADDRESS_MAP_START( mod2_memmap, ADDRESS_SPACE_PROGRAM, 8 )
 	AM_RANGE(0x0800, 0x0810) AM_WRITE(characteriser_w)
 	AM_RANGE(0x0800, 0x0810) AM_READ( characteriser_r)
 
-	AM_RANGE(0x0850, 0x0850) AM_WRITE(bankswitch_w)	// write bank (rom page select)
+	AM_RANGE(0x0850, 0x0850) AM_READWRITE(bankswitch_r,bankswitch_w)	// write bank (rom page select)
 
 //  AM_RANGE(0x08E0, 0x08E7) AM_READ( 68681_duart_r)
 //  AM_RANGE(0x08E0, 0x08E7) AM_WRITE( 68681_duart_w)
diff --git a/src/mame/drivers/mpu4drvr.c b/src/mame/drivers/mpu4drvr.c
index 5df8d88bd0f..0880157b72e 100644
--- a/src/mame/drivers/mpu4drvr.c
+++ b/src/mame/drivers/mpu4drvr.c
@@ -1167,13 +1167,13 @@ INPUT_PORTS_END
 static INPUT_PORTS_START( dealem )
 	PORT_START_TAG("ORANGE1")
 	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_BUTTON1) PORT_NAME("Gamble")
-	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_START2) PORT_NAME("Pontoon")
+	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_UNUSED)
 	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_UNUSED)
 	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_UNUSED)
 	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_UNUSED)
 	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_UNUSED)
 	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_UNUSED)
-	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_INTERLOCK) PORT_NAME("Rear Door") PORT_TOGGLE
+	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_UNKNOWN)
 
 	PORT_START_TAG("ORANGE2")
 	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_COIN5) PORT_NAME("20p Token")PORT_IMPULSE(3)
@@ -1187,13 +1187,13 @@ static INPUT_PORTS_START( dealem )
 
 	PORT_START_TAG("BLACK1")
 	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_BUTTON5) PORT_NAME("Collect")
-	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_UNKNOWN) //Duplicate for Pontoon button
+	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_START2) PORT_NAME("Pontoon")
 	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_UNUSED)
 	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_UNUSED)
 	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_UNUSED)
 	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_SERVICE) PORT_NAME("Test Button") PORT_CODE(KEYCODE_W)
 	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_SERVICE) PORT_NAME("Refill Key") PORT_CODE(KEYCODE_R) PORT_TOGGLE
-	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_INTERLOCK) PORT_NAME("Cashbox Door")  PORT_CODE(KEYCODE_Q) PORT_TOGGLE
+	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_INTERLOCK) PORT_NAME("Rear Door")  PORT_CODE(KEYCODE_Q) PORT_TOGGLE
 
 	PORT_START_TAG("BLACK2")
 	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_START1) PORT_NAME("Hi-Lo")
@@ -1573,7 +1573,7 @@ static ADDRESS_MAP_START( dealem_memmap, ADDRESS_SPACE_PROGRAM, 8 )
 	AM_RANGE(0x0800, 0x0800) AM_DEVWRITE(MC6845, "crtc", mc6845_address_w)
 	AM_RANGE(0x0801, 0x0801) AM_DEVREADWRITE(MC6845, "crtc", mc6845_register_r, mc6845_register_w)
 
-//  AM_RANGE(0x0850, 0x0850) AM_WRITE(bankswitch_w) // write bank (rom page select)
+// 	AM_RANGE(0x0850, 0x0850) AM_READWRITE(bankswitch_r,bankswitch_w)	// write bank (rom page select)
 
 //  AM_RANGE(0x08E0, 0x08E7) AM_READ( 68681_duart_r)
 //  AM_RANGE(0x08E0, 0x08E7) AM_WRITE( 68681_duart_w)