diff --git a/src/mame/drivers/goldnpkr.cpp b/src/mame/drivers/goldnpkr.cpp
index 1d71c1ced30..c481d49a73a 100644
--- a/src/mame/drivers/goldnpkr.cpp
+++ b/src/mame/drivers/goldnpkr.cpp
@@ -4705,11 +4705,7 @@ MACHINE_CONFIG_START(blitz_state::megadpkr)
 	MCFG_DEVICE_ADD("maincpu", M6502, CPU_CLOCK)
 	MCFG_DEVICE_PROGRAM_MAP(megadpkr_map)
 
-	ADDRESS_MAP_BANK(config, m_bankdev);
-	m_bankdev->set_map(&blitz_state::megadpkr_banked_map);
-	m_bankdev->set_data_width(8);
-	m_bankdev->set_addr_width(16);
-	m_bankdev->set_stride(0x4000);
+	ADDRESS_MAP_BANK(config, "bankdev").set_map(&blitz_state::megadpkr_banked_map).set_data_width(8).set_addr_width(16).set_stride(0x4000);
 
 	MCFG_DEVICE_ADD("mcu", M68705P5, CPU_CLOCK) /* unknown */
 	MCFG_M68705_PORTB_W_CB(WRITE8(*this, blitz_state, mcu_portb_w))
diff --git a/src/mame/drivers/megaplay.cpp b/src/mame/drivers/megaplay.cpp
index 62bca13e941..9822a1ec776 100644
--- a/src/mame/drivers/megaplay.cpp
+++ b/src/mame/drivers/megaplay.cpp
@@ -686,7 +686,7 @@ MACHINE_CONFIG_START(mplay_state::megaplay)
 	cxd1095_device &io2(CXD1095(config, "io2", 0));
 	io2.in_porta_cb().set_ioport("TEST");
 	io2.in_portb_cb().set_ioport("COIN");
-	io2.in_portb_cb().set(FUNC(mplay_state::bios_6402_r));
+	io2.in_portc_cb().set(FUNC(mplay_state::bios_6402_r));
 	io2.out_portc_cb().set(FUNC(mplay_state::bios_6402_w));
 	io2.out_portd_cb().set(FUNC(mplay_state::bios_gamesel_w));
 	io2.in_porte_cb().set(FUNC(mplay_state::bios_6404_r));