diff --git a/scripts/target/mame/mess.lua b/scripts/target/mame/mess.lua
index 032e9698218..9d441207bdf 100644
--- a/scripts/target/mame/mess.lua
+++ b/scripts/target/mame/mess.lua
@@ -911,6 +911,7 @@ function linkProjects_mame_mess(_target, _subtarget)
 		"comx",
 		"concept",
 		"conitec",
+		"cxg",
 		"cybiko",
 		"dai",
 		"ddr",
@@ -1692,6 +1693,11 @@ files {
 	MAME_DIR .. "src/mame/machine/prof80mmu.h",
 }
 
+createMESSProjects(_target, _subtarget, "cxg")
+files {
+	MAME_DIR .. "src/mame/drivers/cxgz80.cpp",
+}
+
 createMESSProjects(_target, _subtarget, "cybiko")
 files {
 	MAME_DIR .. "src/mame/drivers/cybiko.cpp",
diff --git a/src/mame/drivers/cxgz80.cpp b/src/mame/drivers/cxgz80.cpp
new file mode 100644
index 00000000000..01ab5a93732
--- /dev/null
+++ b/src/mame/drivers/cxgz80.cpp
@@ -0,0 +1,388 @@
+// license:BSD-3-Clause
+// copyright-holders:hap
+// thanks-to:Berger
+/******************************************************************************
+
+    CXG* generic Z80 based chess computer driver
+    *later known as CXG Newcrest Technology Ltd.
+
+    NOTE: MAME doesn't include a generalized implementation for boardpieces yet,
+    greatly affecting user playability of emulated electronic board games.
+    As workaround for the chess games, use an external chess GUI on the side,
+    such as Arena(in editmode).
+
+    TODO:
+    - x
+
+******************************************************************************
+
+Chess 2001:
+- Zilog Z8400APS @ 4 MHz (8MHz XTAL)
+- 2KB RAM HM6116, 16KB ROM D27128D
+- TTL, piezo, 8*8+9 LEDs, magnetic sensors
+
+******************************************************************************/
+
+#include "emu.h"
+#include "cpu/z80/z80.h"
+#include "sound/dac.h"
+#include "sound/volt_reg.h"
+
+// internal artwork
+//#include "cxg_chess2001.lh" // clickable
+
+
+class cxgz80_state : public driver_device
+{
+public:
+	cxgz80_state(const machine_config &mconfig, device_type type, const char *tag)
+		: driver_device(mconfig, type, tag),
+		m_maincpu(*this, "maincpu"),
+		m_dac(*this, "dac"),
+		m_inp_matrix(*this, "IN.%u", 0),
+		m_display_wait(33),
+		m_display_maxy(1),
+		m_display_maxx(0)
+	{ }
+
+	// devices/pointers
+	required_device<cpu_device> m_maincpu;
+	optional_device<dac_bit_interface> m_dac;
+	optional_ioport_array<8> m_inp_matrix;
+
+	TIMER_DEVICE_CALLBACK_MEMBER(irq_on) { m_maincpu->set_input_line(INPUT_LINE_IRQ0, ASSERT_LINE); }
+	TIMER_DEVICE_CALLBACK_MEMBER(irq_off) { m_maincpu->set_input_line(INPUT_LINE_IRQ0, CLEAR_LINE); }
+
+	// misc common
+	u16 m_inp_mux;                  // multiplexed keypad mask
+	u16 m_led_select;
+	u16 m_led_data;
+
+	u16 read_inputs(int columns);
+
+	// display common
+	int m_display_wait;             // led/lamp off-delay in microseconds (default 33ms)
+	int m_display_maxy;             // display matrix number of rows
+	int m_display_maxx;             // display matrix number of columns (max 31 for now)
+
+	u32 m_display_state[0x20];      // display matrix rows data (last bit is used for always-on)
+	u16 m_display_segmask[0x20];    // if not 0, display matrix row is a digit, mask indicates connected segments
+	u32 m_display_cache[0x20];      // (internal use)
+	u8 m_display_decay[0x20][0x20]; // (internal use)
+	
+	TIMER_DEVICE_CALLBACK_MEMBER(display_decay_tick);
+	void display_update();
+	void set_display_size(int maxx, int maxy);
+	void display_matrix(int maxx, int maxy, u32 setx, u32 sety, bool update = true);
+
+	// Chess 2001
+	//x
+
+protected:
+	virtual void machine_start() override;
+	virtual void machine_reset() override;
+};
+
+
+// machine start/reset
+
+void cxgz80_state::machine_start()
+{
+	// zerofill
+	memset(m_display_state, 0, sizeof(m_display_state));
+	memset(m_display_cache, ~0, sizeof(m_display_cache));
+	memset(m_display_decay, 0, sizeof(m_display_decay));
+	memset(m_display_segmask, 0, sizeof(m_display_segmask));
+
+	m_inp_mux = 0;
+	m_led_select = 0;
+	m_led_data = 0;
+
+	// register for savestates
+	save_item(NAME(m_display_maxy));
+	save_item(NAME(m_display_maxx));
+	save_item(NAME(m_display_wait));
+
+	save_item(NAME(m_display_state));
+	/* save_item(NAME(m_display_cache)); */ // don't save!
+	save_item(NAME(m_display_decay));
+	save_item(NAME(m_display_segmask));
+
+	save_item(NAME(m_inp_mux));
+	save_item(NAME(m_led_select));
+	save_item(NAME(m_led_data));
+}
+
+void cxgz80_state::machine_reset()
+{
+}
+
+
+
+/***************************************************************************
+
+  Helper Functions
+
+***************************************************************************/
+
+// The device may strobe the outputs very fast, it is unnoticeable to the user.
+// To prevent flickering here, we need to simulate a decay.
+
+void cxgz80_state::display_update()
+{
+	u32 active_state[0x20];
+
+	for (int y = 0; y < m_display_maxy; y++)
+	{
+		active_state[y] = 0;
+
+		for (int x = 0; x <= m_display_maxx; x++)
+		{
+			// turn on powered segments
+			if (m_display_state[y] >> x & 1)
+				m_display_decay[y][x] = m_display_wait;
+
+			// determine active state
+			u32 ds = (m_display_decay[y][x] != 0) ? 1 : 0;
+			active_state[y] |= (ds << x);
+		}
+	}
+
+	// on difference, send to output
+	for (int y = 0; y < m_display_maxy; y++)
+		if (m_display_cache[y] != active_state[y])
+		{
+			if (m_display_segmask[y] != 0)
+				output().set_digit_value(y, active_state[y] & m_display_segmask[y]);
+
+			const int mul = (m_display_maxx <= 10) ? 10 : 100;
+			for (int x = 0; x <= m_display_maxx; x++)
+			{
+				int state = active_state[y] >> x & 1;
+				char buf1[0x10]; // lampyx
+				char buf2[0x10]; // y.x
+
+				if (x == m_display_maxx)
+				{
+					// always-on if selected
+					sprintf(buf1, "lamp%da", y);
+					sprintf(buf2, "%d.a", y);
+				}
+				else
+				{
+					sprintf(buf1, "lamp%d", y * mul + x);
+					sprintf(buf2, "%d.%d", y, x);
+				}
+				output().set_value(buf1, state);
+				output().set_value(buf2, state);
+			}
+		}
+
+	memcpy(m_display_cache, active_state, sizeof(m_display_cache));
+}
+
+TIMER_DEVICE_CALLBACK_MEMBER(cxgz80_state::display_decay_tick)
+{
+	// slowly turn off unpowered segments
+	for (int y = 0; y < m_display_maxy; y++)
+		for (int x = 0; x <= m_display_maxx; x++)
+			if (m_display_decay[y][x] != 0)
+				m_display_decay[y][x]--;
+
+	display_update();
+}
+
+void cxgz80_state::set_display_size(int maxx, int maxy)
+{
+	m_display_maxx = maxx;
+	m_display_maxy = maxy;
+}
+
+void cxgz80_state::display_matrix(int maxx, int maxy, u32 setx, u32 sety, bool update)
+{
+	set_display_size(maxx, maxy);
+
+	// update current state
+	u32 mask = (1 << maxx) - 1;
+	for (int y = 0; y < maxy; y++)
+		m_display_state[y] = (sety >> y & 1) ? ((setx & mask) | (1 << maxx)) : 0;
+
+	if (update)
+		display_update();
+}
+
+
+// generic input handlers
+
+u16 cxgz80_state::read_inputs(int columns)
+{
+	u16 ret = 0;
+
+	// read selected input rows
+	for (int i = 0; i < columns; i++)
+		if (m_inp_mux >> i & 1)
+			ret |= m_inp_matrix[i]->read();
+
+	return ret;
+}
+
+
+
+// Devices, I/O
+
+/******************************************************************************
+    Chess 2001
+******************************************************************************/
+
+// TTL
+
+
+
+/******************************************************************************
+    Address Maps
+******************************************************************************/
+
+// Chess 2001
+
+static ADDRESS_MAP_START( ch2001_map, AS_PROGRAM, 8, cxgz80_state )
+	AM_RANGE(0x0000, 0x3fff) AM_ROM
+	AM_RANGE(0x4000, 0x47ff) AM_MIRROR(0x3800) AM_RAM
+ADDRESS_MAP_END
+
+
+
+/******************************************************************************
+    Input Ports
+******************************************************************************/
+
+static INPUT_PORTS_START( cb_magnets )
+	PORT_START("IN.0")
+	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+
+	PORT_START("IN.1")
+	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+
+	PORT_START("IN.2")
+	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+
+	PORT_START("IN.3")
+	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+
+	PORT_START("IN.4")
+	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+
+	PORT_START("IN.5")
+	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+
+	PORT_START("IN.6")
+	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+
+	PORT_START("IN.7")
+	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_TOGGLE PORT_NAME("Board Sensor")
+INPUT_PORTS_END
+
+
+static INPUT_PORTS_START( ch2001 )
+	PORT_INCLUDE( cb_magnets )
+INPUT_PORTS_END
+
+
+
+/******************************************************************************
+    Machine Drivers
+******************************************************************************/
+
+static MACHINE_CONFIG_START( ch2001, cxgz80_state )
+
+	/* basic machine hardware */
+	MCFG_CPU_ADD("maincpu", Z80, XTAL_8MHz/2)
+	MCFG_CPU_PROGRAM_MAP(ch2001_map)
+	MCFG_TIMER_DRIVER_ADD_PERIODIC("irq_on", cxgz80_state, irq_on, attotime::from_hz(484)) // theoretical frequency from 555 timer (22nF, 100K+33K, 1K2), measurement was 568Hz
+	MCFG_TIMER_START_DELAY(attotime::from_hz(484) - attotime::from_nsec(18300)) // active for 18.3us
+	MCFG_TIMER_DRIVER_ADD_PERIODIC("irq_off", cxgz80_state, irq_off, attotime::from_hz(484))
+
+	MCFG_TIMER_DRIVER_ADD_PERIODIC("display_decay", cxgz80_state, display_decay_tick, attotime::from_msec(1))
+	//MCFG_DEFAULT_LAYOUT(layout_cxg_chess2001)
+
+	/* sound hardware */
+	MCFG_SPEAKER_STANDARD_MONO("speaker")
+	MCFG_SOUND_ADD("dac", DAC_1BIT, 0) MCFG_SOUND_ROUTE(ALL_OUTPUTS, "speaker", 0.25)
+	MCFG_DEVICE_ADD("vref", VOLTAGE_REGULATOR, 0) MCFG_VOLTAGE_REGULATOR_OUTPUT(5.0)
+	MCFG_SOUND_ROUTE_EX(0, "dac", 1.0, DAC_VREF_POS_INPUT)
+MACHINE_CONFIG_END
+
+
+
+/******************************************************************************
+    ROM Definitions
+******************************************************************************/
+
+ROM_START( ch2001 )
+	ROM_REGION( 0x10000, "maincpu", 0 )
+	ROM_LOAD("ch2001.bin", 0x0000, 0x4000, CRC(b3485c73) SHA1(f405c6f67fe70edf45dcc383a4049ee6bad387a9) ) // D27128D, no label
+ROM_END
+
+
+
+/******************************************************************************
+    Drivers
+******************************************************************************/
+
+/*    YEAR  NAME       PARENT    COMPAT  MACHINE   INPUT     INIT                      COMPANY, FULLNAME, FLAGS */
+CONS( 1984, ch2001,    0,        0,      ch2001,   ch2001,   driver_device,   0,       "CXG", "Chess 2001", MACHINE_SUPPORTS_SAVE | MACHINE_CLICKABLE_ARTWORK | MACHINE_NOT_WORKING )
diff --git a/src/mame/drivers/novag6502.cpp b/src/mame/drivers/novag6502.cpp
index 019ac0d8595..1a0e0390fd4 100644
--- a/src/mame/drivers/novag6502.cpp
+++ b/src/mame/drivers/novag6502.cpp
@@ -216,17 +216,6 @@ void novagbase_state::set_display_size(int maxx, int maxy)
 	m_display_maxy = maxy;
 }
 
-void novagbase_state::set_display_segmask(u32 digits, u32 mask)
-{
-	// set a segment mask per selected digit, but leave unselected ones alone
-	for (int i = 0; i < 0x20; i++)
-	{
-		if (digits & 1)
-			m_display_segmask[i] = mask;
-		digits >>= 1;
-	}
-}
-
 void novagbase_state::display_matrix(int maxx, int maxy, u32 setx, u32 sety, bool update)
 {
 	set_display_size(maxx, maxy);
diff --git a/src/mame/includes/hh_ucom4.h b/src/mame/includes/hh_ucom4.h
index 883e379685a..9fe5346c1b3 100644
--- a/src/mame/includes/hh_ucom4.h
+++ b/src/mame/includes/hh_ucom4.h
@@ -9,7 +9,6 @@
 #ifndef _HH_UCOM4_H_
 #define _HH_UCOM4_H_
 
-
 #include "rendlay.h"
 #include "cpu/ucom4/ucom4.h"
 #include "sound/speaker.h"
diff --git a/src/mame/includes/novagbase.h b/src/mame/includes/novagbase.h
index b0e25131b5a..e4072a0cf3b 100644
--- a/src/mame/includes/novagbase.h
+++ b/src/mame/includes/novagbase.h
@@ -27,7 +27,7 @@ public:
 	required_device<cpu_device> m_maincpu;
 	optional_device<beep_device> m_beeper;
 	optional_device<hd44780_device> m_lcd;
-	optional_ioport_array<8> m_inp_matrix;
+	optional_ioport_array<8> m_inp_matrix; // max 8
 
 	// misc common
 	u16 m_inp_mux;                  // multiplexed keypad mask
@@ -50,7 +50,6 @@ public:
 	TIMER_DEVICE_CALLBACK_MEMBER(display_decay_tick);
 	void display_update();
 	void set_display_size(int maxx, int maxy);
-	void set_display_segmask(u32 digits, u32 mask);
 	void display_matrix(int maxx, int maxy, u32 setx, u32 sety, bool update = true);
 
 	DECLARE_PALETTE_INIT(novag_lcd);
diff --git a/src/mame/mame.lst b/src/mame/mame.lst
index a547c74d9e6..4eafe011d6d 100644
--- a/src/mame/mame.lst
+++ b/src/mame/mame.lst
@@ -10488,6 +10488,9 @@ spacefrt                        // (c) 1981 Century
 superbik                        // (c) 1983 Century
 wallst                          // (c) 1982 Century
 
+@source:cxgz80.cpp
+ch2001                          //
+
 @source:cxhumax.cpp
 hxhdci2k                        //
 
diff --git a/src/mame/mess.flt b/src/mame/mess.flt
index 51cc4bb559f..be83d326af0 100644
--- a/src/mame/mess.flt
+++ b/src/mame/mess.flt
@@ -132,6 +132,7 @@ craft.cpp
 crvision.cpp
 ct486.cpp
 cvicny.cpp
+cxgz80.cpp
 cxhumax.cpp
 cybiko.cpp
 czk80.cpp