diff --git a/src/emu/machine/pd4990a.c b/src/emu/machine/pd4990a.c
index 8ac4d3764a6..2b03dace165 100644
--- a/src/emu/machine/pd4990a.c
+++ b/src/emu/machine/pd4990a.c
@@ -84,8 +84,8 @@ struct upd4990a_state
 INLINE upd4990a_state *get_safe_token(device_t *device)
 {
 	assert(device != NULL);
-	assert((device->type() == UPD4990A));
-	return (upd4990a_state *)downcast<upd4990a_device *>(device)->token();
+	assert((device->type() == UPD4990A_OLD));
+	return (upd4990a_state *)downcast<upd4990a_old_device *>(device)->token();
 }
 
 INLINE UINT8 convert_to_bcd(int val)
@@ -520,10 +520,10 @@ static DEVICE_RESET( upd4990a )
 	upd4990a->command_line = 0;
 }
 
-const device_type UPD4990A = &device_creator<upd4990a_device>;
+const device_type UPD4990A_OLD = &device_creator<upd4990a_old_device>;
 
-upd4990a_device::upd4990a_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
-	: device_t(mconfig, UPD4990A, "NEC uPD4990A", tag, owner, clock)
+upd4990a_old_device::upd4990a_old_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+	: device_t(mconfig, UPD4990A_OLD, "NEC uPD4990A", tag, owner, clock)
 {
 	m_token = global_alloc_clear(upd4990a_state);
 }
@@ -534,7 +534,7 @@ upd4990a_device::upd4990a_device(const machine_config &mconfig, const char *tag,
 //  complete
 //-------------------------------------------------
 
-void upd4990a_device::device_config_complete()
+void upd4990a_old_device::device_config_complete()
 {
 }
 
@@ -542,7 +542,7 @@ void upd4990a_device::device_config_complete()
 //  device_start - device-specific startup
 //-------------------------------------------------
 
-void upd4990a_device::device_start()
+void upd4990a_old_device::device_start()
 {
 	DEVICE_START_NAME( upd4990a )(this);
 }
@@ -551,7 +551,7 @@ void upd4990a_device::device_start()
 //  device_reset - device-specific reset
 //-------------------------------------------------
 
-void upd4990a_device::device_reset()
+void upd4990a_old_device::device_reset()
 {
 	DEVICE_RESET_NAME( upd4990a )(this);
 }
diff --git a/src/emu/machine/pd4990a.h b/src/emu/machine/pd4990a.h
index b5d5b57c7ac..98f42f52bc5 100644
--- a/src/emu/machine/pd4990a.h
+++ b/src/emu/machine/pd4990a.h
@@ -6,8 +6,8 @@
 
 ***************************************************************************/
 
-#ifndef __PD4990A_H__
-#define __PD4990A_H__
+#ifndef __PD4990A_OLD_H__
+#define __PD4990A_OLD_H__
 
 #include "devlegcy.h"
 
@@ -16,11 +16,11 @@
     MACROS / CONSTANTS
 ***************************************************************************/
 
-class upd4990a_device : public device_t
+class upd4990a_old_device : public device_t
 {
 public:
-	upd4990a_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
-	~upd4990a_device() { global_free(m_token); }
+	upd4990a_old_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+	~upd4990a_old_device() { global_free(m_token); }
 
 	// access to legacy token
 	void *token() const { assert(m_token != NULL); return m_token; }
@@ -34,11 +34,11 @@ private:
 	void *m_token;
 };
 
-extern const device_type UPD4990A;
+extern const device_type UPD4990A_OLD;
 
 
-#define MCFG_UPD4990A_ADD(_tag) \
-	MCFG_DEVICE_ADD(_tag, UPD4990A, 0)
+#define MCFG_UPD4990A_OLD_ADD(_tag) \
+	MCFG_DEVICE_ADD(_tag, UPD4990A_OLD, 0)
 
 
 /***************************************************************************
diff --git a/src/emu/machine/upd1990a.c b/src/emu/machine/upd1990a.c
index b7a50d55144..aec6bd97653 100644
--- a/src/emu/machine/upd1990a.c
+++ b/src/emu/machine/upd1990a.c
@@ -21,6 +21,7 @@
 
 // device type definition
 const device_type UPD1990A = &device_creator<upd1990a_device>;
+const device_type UPD4990A = &device_creator<upd4990a_device>;
 
 
 //**************************************************************************
@@ -53,21 +54,35 @@ enum
 //  upd1990a_device - constructor
 //-------------------------------------------------
 
-upd1990a_device::upd1990a_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
-    : device_t(mconfig, UPD1990A, "uPD1990A", tag, owner, clock),
+upd1990a_rtc_device::upd1990a_rtc_device(const machine_config &mconfig, device_type type, const char* name, const char *tag, device_t *owner, UINT32 clock)
+	: device_t(mconfig, type, name, tag, owner, clock),
       device_rtc_interface(mconfig, *this),
       m_data_out(0)
 {
 }
 
 
+upd1990a_device::upd1990a_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+		: upd1990a_rtc_device(mconfig, UPD1990A, "uPD1990A", tag, owner, clock)
+{
+	m_device_type = TYPE_UPD1990A;
+}
+
+
+upd4990a_device::upd4990a_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+		: upd1990a_rtc_device(mconfig, UPD4990A, "uPD4990A", tag, owner, clock)
+{
+	m_device_type = TYPE_UPD4990A;
+}
+
+
 //-------------------------------------------------
 //  device_config_complete - perform any
 //  operations now that the configuration is
 //  complete
 //-------------------------------------------------
 
-void upd1990a_device::device_config_complete()
+void upd1990a_rtc_device::device_config_complete()
 {
 	// inherit a copy of the static data
 	const upd1990a_interface *intf = reinterpret_cast<const upd1990a_interface *>(static_config());
@@ -87,7 +102,7 @@ void upd1990a_device::device_config_complete()
 //  device_start - device-specific startup
 //-------------------------------------------------
 
-void upd1990a_device::device_start()
+void upd1990a_rtc_device::device_start()
 {
 	// resolve callbacks
 	m_out_data_func.resolve(m_out_data_cb, *this);
@@ -119,7 +134,7 @@ void upd1990a_device::device_start()
 //  device_reset - device-specific reset
 //-------------------------------------------------
 
-void upd1990a_device::device_reset()
+void upd1990a_rtc_device::device_reset()
 {
 	set_current_time(machine());
 }
@@ -129,7 +144,7 @@ void upd1990a_device::device_reset()
 //  device_timer - handler timer events
 //-------------------------------------------------
 
-void upd1990a_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
+void upd1990a_rtc_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
 {
 	switch (id)
 	{
@@ -194,7 +209,7 @@ void upd1990a_device::device_timer(emu_timer &timer, device_timer_id id, int par
 //  rtc_clock_updated -
 //-------------------------------------------------
 
-void upd1990a_device::rtc_clock_updated(int year, int month, int day, int day_of_week, int hour, int minute, int second)
+void upd1990a_rtc_device::rtc_clock_updated(int year, int month, int day, int day_of_week, int hour, int minute, int second)
 {
 	m_time_counter[0] = convert_to_bcd(second);
 	m_time_counter[1] = convert_to_bcd(minute);
@@ -208,7 +223,7 @@ void upd1990a_device::rtc_clock_updated(int year, int month, int day, int day_of
 //  oe_w -
 //-------------------------------------------------
 
-WRITE_LINE_MEMBER( upd1990a_device::oe_w )
+WRITE_LINE_MEMBER( upd1990a_rtc_device::oe_w )
 {
 	if (LOG) logerror("uPD1990A '%s' OE %u\n", tag(), state);
 
@@ -220,7 +235,7 @@ WRITE_LINE_MEMBER( upd1990a_device::oe_w )
 //  cs_w -
 //-------------------------------------------------
 
-WRITE_LINE_MEMBER( upd1990a_device::cs_w )
+WRITE_LINE_MEMBER( upd1990a_rtc_device::cs_w )
 {
 	if (LOG) logerror("uPD1990A '%s' CS %u\n", tag(), state);
 
@@ -232,7 +247,7 @@ WRITE_LINE_MEMBER( upd1990a_device::cs_w )
 //  stb_w -
 //-------------------------------------------------
 
-WRITE_LINE_MEMBER( upd1990a_device::stb_w )
+WRITE_LINE_MEMBER( upd1990a_rtc_device::stb_w )
 {
 	if (LOG) logerror("uPD1990A '%s' STB %u\n", tag(), state);
 
@@ -380,7 +395,7 @@ WRITE_LINE_MEMBER( upd1990a_device::stb_w )
 //  clk_w -
 //-------------------------------------------------
 
-WRITE_LINE_MEMBER( upd1990a_device::clk_w )
+WRITE_LINE_MEMBER( upd1990a_rtc_device::clk_w )
 {
 	if (LOG) logerror("uPD1990A '%s' CLK %u\n", tag(), state);
 
@@ -422,7 +437,7 @@ WRITE_LINE_MEMBER( upd1990a_device::clk_w )
 //  c0_w -
 //-------------------------------------------------
 
-WRITE_LINE_MEMBER( upd1990a_device::c0_w )
+WRITE_LINE_MEMBER( upd1990a_rtc_device::c0_w )
 {
 	if (LOG) logerror("uPD1990A '%s' C0 %u\n", tag(), state);
 
@@ -434,7 +449,7 @@ WRITE_LINE_MEMBER( upd1990a_device::c0_w )
 //  c1_w -
 //-------------------------------------------------
 
-WRITE_LINE_MEMBER( upd1990a_device::c1_w )
+WRITE_LINE_MEMBER( upd1990a_rtc_device::c1_w )
 {
 	if (LOG) logerror("uPD1990A '%s' C1 %u\n", tag(), state);
 
@@ -446,7 +461,7 @@ WRITE_LINE_MEMBER( upd1990a_device::c1_w )
 //  c2_w -
 //-------------------------------------------------
 
-WRITE_LINE_MEMBER( upd1990a_device::c2_w )
+WRITE_LINE_MEMBER( upd1990a_rtc_device::c2_w )
 {
 	if (LOG) logerror("uPD1990A '%s' C2 %u\n", tag(), state);
 
@@ -458,7 +473,7 @@ WRITE_LINE_MEMBER( upd1990a_device::c2_w )
 //  data_in_w -
 //-------------------------------------------------
 
-WRITE_LINE_MEMBER( upd1990a_device::data_in_w )
+WRITE_LINE_MEMBER( upd1990a_rtc_device::data_in_w )
 {
 	if (LOG) logerror("uPD1990A '%s' DATA IN %u\n", tag(), state);
 
@@ -470,7 +485,7 @@ WRITE_LINE_MEMBER( upd1990a_device::data_in_w )
 //  data_out_r -
 //-------------------------------------------------
 
-READ_LINE_MEMBER( upd1990a_device::data_out_r )
+READ_LINE_MEMBER( upd1990a_rtc_device::data_out_r )
 {
 	return m_data_out;
 }
@@ -480,7 +495,7 @@ READ_LINE_MEMBER( upd1990a_device::data_out_r )
 //  tp_r -
 //-------------------------------------------------
 
-READ_LINE_MEMBER( upd1990a_device::tp_r )
+READ_LINE_MEMBER( upd1990a_rtc_device::tp_r )
 {
 	return m_tp;
 }
diff --git a/src/emu/machine/upd1990a.h b/src/emu/machine/upd1990a.h
index 1d4d3385b0c..8b7c7b21599 100644
--- a/src/emu/machine/upd1990a.h
+++ b/src/emu/machine/upd1990a.h
@@ -61,13 +61,13 @@ struct upd1990a_interface
 
 // ======================> upd1990a_device
 
-class upd1990a_device :	public device_t,
-						public device_rtc_interface,
-                        public upd1990a_interface
+class upd1990a_rtc_device :	public device_t,
+						    public device_rtc_interface,
+                            public upd1990a_interface
 {
 public:
     // construction/destruction
-    upd1990a_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+	upd1990a_rtc_device(const machine_config &mconfig, device_type type, const char* name, const char *tag, device_t *owner, UINT32 clock);
 
 	DECLARE_WRITE_LINE_MEMBER( oe_w );
 	DECLARE_WRITE_LINE_MEMBER( cs_w );
@@ -89,6 +89,11 @@ protected:
 
 	// device_rtc_interface overrides
 	virtual void rtc_clock_updated(int year, int month, int day, int day_of_week, int hour, int minute, int second);
+	enum {
+			TYPE_UPD1990A = 0,
+			TYPE_UPD4990A
+	};
+	int m_device_type;
 
 private:
 	static const device_timer_id TIMER_CLOCK = 0;
@@ -119,10 +124,21 @@ private:
 	emu_timer *m_timer_test_mode;
 };
 
+class upd1990a_device : public upd1990a_rtc_device
+{
+public:
+	upd1990a_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+};
+
+
+class upd4990a_device : public upd1990a_rtc_device
+{
+public:
+	upd4990a_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+};
 
 // device type definition
 extern const device_type UPD1990A;
-
-
+extern const device_type UPD4990A;
 
 #endif
diff --git a/src/mame/drivers/neogeo.c b/src/mame/drivers/neogeo.c
index 9a914bc4968..910b89bc2d6 100644
--- a/src/mame/drivers/neogeo.c
+++ b/src/mame/drivers/neogeo.c
@@ -1437,7 +1437,7 @@ MACHINE_CONFIG_START( neogeo_base, neogeo_state )
 	MCFG_SOUND_ROUTE(2, "rspeaker", 1.0)
 
 	/* NEC uPD4990A RTC */
-	MCFG_UPD4990A_ADD("upd4990a")
+	MCFG_UPD4990A_OLD_ADD("upd4990a")
 MACHINE_CONFIG_END
 
 static MACHINE_CONFIG_DERIVED( neogeo, neogeo_base )
diff --git a/src/mame/drivers/neoprint.c b/src/mame/drivers/neoprint.c
index c3efaa6635b..6d19380a2c6 100644
--- a/src/mame/drivers/neoprint.c
+++ b/src/mame/drivers/neoprint.c
@@ -471,7 +471,7 @@ static MACHINE_CONFIG_START( neoprint, neoprint_state )
 	MCFG_CPU_PROGRAM_MAP(neoprint_audio_map)
 	MCFG_CPU_IO_MAP(neoprint_audio_io_map)
 
-	MCFG_UPD4990A_ADD("upd4990a")
+	MCFG_UPD4990A_OLD_ADD("upd4990a")
 	MCFG_NVRAM_ADD_0FILL("nvram")
 
 	MCFG_GFXDECODE(neoprint)
@@ -511,7 +511,7 @@ static MACHINE_CONFIG_START( nprsp, neoprint_state )
 	MCFG_CPU_PROGRAM_MAP(neoprint_audio_map)
 	MCFG_CPU_IO_MAP(neoprint_audio_io_map)
 
-	MCFG_UPD4990A_ADD("upd4990a")
+	MCFG_UPD4990A_OLD_ADD("upd4990a")
 	MCFG_NVRAM_ADD_0FILL("nvram")
 
 	MCFG_GFXDECODE(neoprint)
diff --git a/src/mess/drivers/pc8801.c b/src/mess/drivers/pc8801.c
index b76dfdc93d3..86a17a8700f 100644
--- a/src/mess/drivers/pc8801.c
+++ b/src/mess/drivers/pc8801.c
@@ -2149,7 +2149,7 @@ static INPUT_PORTS_START( pc8001 )
 	PORT_DIPNAME( 0x08, 0x00, "Auto-boot floppy at start-up" )
 	PORT_DIPSETTING(    0x08, DEF_STR( Off ) )
 	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
-	PORT_BIT( 0x10, IP_ACTIVE_HIGH,IPT_SPECIAL ) PORT_READ_LINE_DEVICE_MEMBER("upd1990a", upd1990a_device, data_out_r)
+	PORT_BIT( 0x10, IP_ACTIVE_HIGH,IPT_SPECIAL ) PORT_READ_LINE_DEVICE_MEMBER("upd1990a", upd1990a_rtc_device, data_out_r)
 	PORT_BIT( 0x20, IP_ACTIVE_HIGH,IPT_CUSTOM ) PORT_VBLANK("screen")
 	PORT_BIT( 0xc0, IP_ACTIVE_LOW, IPT_UNUSED )
 
diff --git a/src/mess/drivers/pc9801.c b/src/mess/drivers/pc9801.c
index dbdaf207305..8b11434aa1d 100644
--- a/src/mess/drivers/pc9801.c
+++ b/src/mess/drivers/pc9801.c
@@ -2732,7 +2732,7 @@ static INPUT_PORTS_START( pc9801 )
 	PORT_BIT(0x80,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME(" un 7-8")  PORT_CHANGED_MEMBER(DEVICE_SELF, pc9801_state, key_stroke, 0x7f) PORT_IMPULSE(1)
 
 	PORT_START("DSW1")
-	PORT_BIT(0x0001, IP_ACTIVE_HIGH,IPT_SPECIAL) PORT_READ_LINE_DEVICE_MEMBER("upd1990a", upd1990a_device, data_out_r)
+	PORT_BIT(0x0001, IP_ACTIVE_HIGH,IPT_SPECIAL) PORT_READ_LINE_DEVICE_MEMBER("upd1990a", upd1990a_rtc_device, data_out_r)
 	PORT_DIPNAME( 0x0002, 0x0000, "DSW1" ) // error beep if OFF
 	PORT_DIPSETTING(      0x0002, DEF_STR( Off ) )
 	PORT_DIPSETTING(      0x0000, DEF_STR( On ) )