From 8eeddd8d7cc98524e726ce652e7d785464cca5c6 Mon Sep 17 00:00:00 2001
From: hap <happppp@users.noreply.github.com>
Date: Sun, 17 Dec 2017 04:52:51 +0100
Subject: [PATCH] add template driver for chessking (nw)

---
 scripts/target/mame/mess.lua  |   6 +
 src/mame/drivers/ckz80.cpp    | 407 ++++++++++++++++++++++++++++++++++
 src/mame/drivers/fidel68k.cpp |   2 +-
 src/mame/layout/ck_master.lay |  20 ++
 src/mame/mame.lst             |   3 +
 src/mame/mess.flt             |   1 +
 6 files changed, 438 insertions(+), 1 deletion(-)
 create mode 100644 src/mame/drivers/ckz80.cpp
 create mode 100644 src/mame/layout/ck_master.lay

diff --git a/scripts/target/mame/mess.lua b/scripts/target/mame/mess.lua
index bc193c331c3..93bb070751d 100644
--- a/scripts/target/mame/mess.lua
+++ b/scripts/target/mame/mess.lua
@@ -955,6 +955,7 @@ function linkProjects_mame_mess(_target, _subtarget)
 		"cccp",
 		"cce",
 		"ccs",
+		"chessking",
 		"chromatics",
 		"chrysler",
 		"coleco",
@@ -1727,6 +1728,11 @@ files {
 	MAME_DIR .. "src/mame/drivers/ccs300.cpp",
 }
 
+createMESSProjects(_target, _subtarget, "chessking")
+files {
+	MAME_DIR .. "src/mame/drivers/ckz80.cpp",
+}
+
 createMESSProjects(_target, _subtarget, "chromatics")
 files {
 	MAME_DIR .. "src/mame/drivers/cgc7900.cpp",
diff --git a/src/mame/drivers/ckz80.cpp b/src/mame/drivers/ckz80.cpp
new file mode 100644
index 00000000000..98155c6073d
--- /dev/null
+++ b/src/mame/drivers/ckz80.cpp
@@ -0,0 +1,407 @@
+// license:BSD-3-Clause
+// copyright-holders:hap
+// thanks-to:Berger
+/******************************************************************************
+
+    Chess King generic Z80 based chess computer driver
+
+    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
+
+******************************************************************************
+
+Master:
+- x
+
+******************************************************************************/
+
+#include "emu.h"
+#include "cpu/z80/z80.h"
+#include "machine/timer.h"
+#include "sound/dac.h"
+#include "sound/volt_reg.h"
+#include "speaker.h"
+
+// internal artwork
+#include "ck_master.lh" // clickable
+
+
+class ckz80_state : public driver_device
+{
+public:
+	ckz80_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_out_x(*this, "%u.%u", 0U, 0U),
+		m_out_a(*this, "%u.a", 0U),
+		m_out_digit(*this, "digit%u", 0U),
+		m_display_wait(33),
+		m_display_maxy(1),
+		m_display_maxx(0)
+	{ }
+
+	// devices/pointers
+	required_device<cpu_device> m_maincpu;
+	required_device<dac_bit_interface> m_dac;
+	optional_ioport_array<10> m_inp_matrix; // max 10
+	output_finder<0x20, 0x20> m_out_x;
+	output_finder<0x20> m_out_a;
+	output_finder<0x20> m_out_digit;
+
+	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 milliseconds (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
+	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);
+
+	// Master
+	//DECLARE_READ8_MEMBER(master_input_r);
+	DECLARE_DRIVER_INIT(master);
+
+protected:
+	virtual void machine_start() override;
+	virtual void machine_reset() override;
+};
+
+
+// machine start/reset
+
+void ckz80_state::machine_start()
+{
+	// resolve handlers
+	m_out_x.resolve();
+	m_out_a.resolve();
+	m_out_digit.resolve();
+
+	// zerofill
+	memset(m_display_state, 0, sizeof(m_display_state));
+	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_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 ckz80_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 ckz80_state::display_update()
+{
+	for (int y = 0; y < m_display_maxy; y++)
+	{
+		u32 active_state = 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 |= (ds << x);
+
+			// output to y.x, or y.a when always-on
+			if (x != m_display_maxx)
+				m_out_x[y][x] = ds;
+			else
+				m_out_a[y] = ds;
+		}
+
+		// output to digity
+		if (m_display_segmask[y] != 0)
+			m_out_digit[y] = active_state & m_display_segmask[y];
+	}
+}
+
+TIMER_DEVICE_CALLBACK_MEMBER(ckz80_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 ckz80_state::set_display_size(int maxx, int maxy)
+{
+	m_display_maxx = maxx;
+	m_display_maxy = maxy;
+}
+
+void ckz80_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 ckz80_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
+
+/******************************************************************************
+    Master
+******************************************************************************/
+
+// TTL/generic
+
+DRIVER_INIT_MEMBER(ckz80_state, master)
+{
+	u8 *rom = memregion("maincpu")->base();
+	const u32 len = memregion("maincpu")->bytes();
+
+	// descramble data lines
+	for (int i = 0; i < len; i++)
+		rom[i] = bitswap<8>(rom[i], 4,5,0,7,6,1,3,2);
+
+	// descramble address lines
+	std::vector<u8> buf(len);
+	memcpy(&buf[0], rom, len);
+	for (int i = 0; i < len; i++)
+		rom[i] = buf[bitswap<16>(i, 15,14,13,12,11,3,7,9, 10,8,6,5,4,2,1,0)];
+}
+
+
+/******************************************************************************
+    Address Maps
+******************************************************************************/
+
+// Master
+
+static ADDRESS_MAP_START( master_map, AS_PROGRAM, 8, ckz80_state )
+	AM_RANGE(0x0000, 0x1fff) AM_ROM
+	AM_RANGE(0xc000, 0xc7ff) AM_RAM
+ADDRESS_MAP_END
+
+
+
+/******************************************************************************
+    Input Ports
+******************************************************************************/
+
+static INPUT_PORTS_START( cb_buttons )
+	PORT_START("IN.0")
+	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+
+	PORT_START("IN.1")
+	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+
+	PORT_START("IN.2")
+	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+
+	PORT_START("IN.3")
+	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+
+	PORT_START("IN.4")
+	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+
+	PORT_START("IN.5")
+	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+
+	PORT_START("IN.6")
+	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+
+	PORT_START("IN.7")
+	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("Board Sensor")
+INPUT_PORTS_END
+
+
+static INPUT_PORTS_START( master )
+	PORT_INCLUDE( cb_buttons )
+
+	PORT_START("IN.8")
+	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_T) PORT_NAME("Black")
+	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_2) PORT_NAME("King")
+	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_3) PORT_NAME("Queen")
+	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_4) PORT_NAME("Rook")
+	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_W) PORT_NAME("Bishop")
+	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_E) PORT_NAME("Knight")
+	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_R) PORT_NAME("Pawn")
+	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_5) PORT_NAME("White")
+
+	PORT_START("IN.9")
+	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_1) PORT_NAME("Set up")
+	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_Q) PORT_NAME("New Game")
+	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_U) PORT_NAME("Take Back")
+	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_Y) PORT_NAME("Forward")
+	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_6) PORT_NAME("Hint")
+	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_I) PORT_NAME("Move")
+	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_8) PORT_NAME("Level")
+	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_7) PORT_NAME("Sound")
+INPUT_PORTS_END
+
+
+
+/******************************************************************************
+    Machine Drivers
+******************************************************************************/
+
+static MACHINE_CONFIG_START( master )
+
+	/* basic machine hardware */
+	MCFG_CPU_ADD("maincpu", Z80, XTAL_8MHz/2)
+	MCFG_CPU_PROGRAM_MAP(master_map)
+	MCFG_TIMER_DRIVER_ADD_PERIODIC("irq_on", ckz80_state, irq_on, attotime::from_hz(429)) // theoretical frequency from 555 timer (22nF, 150K, 1K5), measurement was 418Hz
+	MCFG_TIMER_START_DELAY(attotime::from_hz(429) - attotime::from_nsec(22870)) // active for 22.87us
+	MCFG_TIMER_DRIVER_ADD_PERIODIC("irq_off", ckz80_state, irq_off, attotime::from_hz(429))
+
+	MCFG_TIMER_DRIVER_ADD_PERIODIC("display_decay", ckz80_state, display_decay_tick, attotime::from_msec(1))
+	MCFG_DEFAULT_LAYOUT(layout_ck_master)
+
+	/* 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( ckmaster )
+	ROM_REGION( 0x10000, "maincpu", 0 )
+	ROM_LOAD("ckmaster.bin", 0x0000, 0x2000, CRC(59cbec9e) SHA1(2e0629e65778da62bed857406b91a334698d2fe8) ) // D2764C, no label
+ROM_END
+
+
+
+/******************************************************************************
+    Drivers
+******************************************************************************/
+
+/*    YEAR  NAME       PARENT    COMPAT  MACHINE  INPUT   STATE         INIT    COMPANY, FULLNAME, FLAGS */
+CONS( 1984, ckmaster,  0,        0,      master,  master, ckz80_state,  master, "Chess King", "Master (Chess King)", MACHINE_SUPPORTS_SAVE | MACHINE_CLICKABLE_ARTWORK | MACHINE_IMPERFECT_CONTROLS )
diff --git a/src/mame/drivers/fidel68k.cpp b/src/mame/drivers/fidel68k.cpp
index f8017727bab..c78750fcff7 100644
--- a/src/mame/drivers/fidel68k.cpp
+++ b/src/mame/drivers/fidel68k.cpp
@@ -300,7 +300,7 @@ WRITE8_MEMBER(fidel68k_state::fdes68k_lcd_w)
 DRIVER_INIT_MEMBER(fidel68k_state, fdes2265)
 {
 	u16 *rom = (u16*)memregion("maincpu")->base();
-	unsigned const len = memregion("maincpu")->bytes() / 2;
+	const u32 len = memregion("maincpu")->bytes() / 2;
 
 	// descramble data lines
 	for (int i = 0; i < len; i++)
diff --git a/src/mame/layout/ck_master.lay b/src/mame/layout/ck_master.lay
new file mode 100644
index 00000000000..9d3e4d2766a
--- /dev/null
+++ b/src/mame/layout/ck_master.lay
@@ -0,0 +1,20 @@
+<?xml version="1.0"?>
+<mamelayout version="2">
+
+<!-- define elements -->
+
+	<element name="led" defstate="0">
+		<disk state="0"><color red="0.2" green="0.04" blue="0.046" /></disk>
+		<disk state="1"><color red="1.0" green="0.2" blue="0.23" /></disk>
+	</element>
+
+
+<!-- build screen -->
+
+	<view name="Internal Layout">
+		<bounds left="0" right="100" top="0" bottom="100" />
+
+		<bezel name="0.0" element="led"><bounds x="1" y="1" width="1" height="1" /></bezel>
+
+	</view>
+</mamelayout>
diff --git a/src/mame/mame.lst b/src/mame/mame.lst
index 917e6d72209..320107b7cdb 100644
--- a/src/mame/mame.lst
+++ b/src/mame/mame.lst
@@ -9747,6 +9747,9 @@ citycon                         // (c) 1985 Jaleco
 citycona                        // (c) 1985 Jaleco
 cruisin                         // (c) 1985 Jaleco/Kitkorp
 
+@source:ckz80.cpp
+ckmaster                        //
+
 @source:clayshoo.cpp
 clayshoo                        // [1979 Allied Leisure]
 
diff --git a/src/mame/mess.flt b/src/mame/mess.flt
index d1759860f8e..8140228ee5a 100644
--- a/src/mame/mess.flt
+++ b/src/mame/mess.flt
@@ -127,6 +127,7 @@ chaos.cpp
 chessmst.cpp
 chesstrv.cpp
 cit220.cpp
+ckz80.cpp
 clcd.cpp
 cm1800.cpp
 cmi.cpp