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diff --git a/src/mame/success/othello.cpp b/src/mame/success/othello.cpp
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+// license:BSD-3-Clause
+// copyright-holders:Tomasz Slanina
+/*
+
+Othello (version 3.0) - Success 1984
+-------------------------------------
+
+driver by Tomasz Slanina
+
+CPU Board:
+ D780C - main CPU (Z80)
+ HD46505SP - CRTC
+ D780-C - Sound CPU (Z80)
+ AY-3-8910 x2 - Sound
+ D7751C - ADPCM "Speech processor"
+ D8243 - I/O Expander for D7751C (8048 based)
+
+Video Board:
+ almost empty - 3/4 soldering pins not populated
+
+
+Todo:
+- correct colors (based on the color DAC (24 resistors) on pcb
+- cocktail mode
+- map a bunch of unknown read/writes (related to above I think)
+
+Notes:
+
+DSw 1:2
+Limit for help/undo (matta):
+- when it's off, you can use each of them twice every time you
+ win and advance to the next game
+- when it's on, you can only use them twice throughout the game
+
+*/
+
+#include "emu.h"
+
+#include "cpu/mcs48/mcs48.h"
+#include "cpu/z80/z80.h"
+#include "machine/gen_latch.h"
+#include "machine/i8243.h"
+#include "sound/ay8910.h"
+#include "sound/dac.h"
+#include "video/mc6845.h"
+
+#include "emupal.h"
+#include "screen.h"
+#include "speaker.h"
+
+
+namespace {
+
+constexpr uint8_t TILE_WIDTH = 6;
+
+
+class othello_state : public driver_device
+{
+public:
+ othello_state(const machine_config &mconfig, device_type type, const char *tag) :
+ driver_device(mconfig, type, tag),
+ m_videoram(*this, "videoram"),
+ m_maincpu(*this, "maincpu"),
+ m_ay(*this, "ay%u", 0U),
+ m_upd7751(*this, "upd7751"),
+ m_i8243(*this, "upd7751_8243"),
+ m_palette(*this, "palette"),
+ m_soundlatch(*this, "soundlatch"),
+ m_gfx_data(*this, "gfx"),
+ m_upd7751_data(*this, "upd7751data")
+ { }
+
+ void othello(machine_config &config);
+
+protected:
+ virtual void machine_start() override ATTR_COLD;
+ virtual void machine_reset() override ATTR_COLD;
+
+private:
+ /* memory pointers */
+ required_shared_ptr<uint8_t> m_videoram;
+
+ /* video-related */
+ int m_tile_bank = 0;
+
+ /* misc */
+ int m_ay_select = 0;
+ int m_ack_data = 0;
+ uint8_t m_upd7751_command = 0;
+ int m_sound_addr = 0;
+ int m_upd7751_busy = 0;
+
+ /* devices */
+ required_device<cpu_device> m_maincpu;
+ required_device_array<ay8910_device, 2> m_ay;
+ required_device<upd7751_device> m_upd7751;
+ required_device<i8243_device> m_i8243;
+ required_device<palette_device> m_palette;
+ required_device<generic_latch_8_device> m_soundlatch;
+
+ required_region_ptr<uint8_t> m_gfx_data;
+ required_region_ptr<uint8_t> m_upd7751_data;
+
+ uint8_t unk_87_r();
+ void unk_8a_w(uint8_t data);
+ void upd7751_command_w(uint8_t data);
+ uint8_t upd7751_busy_r();
+ uint8_t sound_ack_r();
+ void unk_8f_w(uint8_t data);
+ void tilebank_w(uint8_t data);
+ uint8_t latch_r();
+ void ay_select_w(uint8_t data);
+ void ack_w(uint8_t data);
+ void ay_address_w(uint8_t data);
+ void ay_data_w(uint8_t data);
+ uint8_t upd7751_rom_r();
+ uint8_t upd7751_command_r();
+ void upd7751_p2_w(uint8_t data);
+ template<int Shift> void upd7751_rom_addr_w(uint8_t data);
+ void upd7751_rom_select_w(uint8_t data);
+
+ void othello_palette(palette_device &palette) const;
+ MC6845_UPDATE_ROW(crtc_update_row);
+
+ void audio_map(address_map &map) ATTR_COLD;
+ void audio_portmap(address_map &map) ATTR_COLD;
+ void main_map(address_map &map) ATTR_COLD;
+ void main_portmap(address_map &map) ATTR_COLD;
+};
+
+
+MC6845_UPDATE_ROW( othello_state::crtc_update_row )
+{
+ rgb_t const *const palette = m_palette->palette()->entry_list_raw();
+ uint8_t const *const gfx = m_gfx_data;
+
+ for(int cx = 0; cx < x_count; ++cx)
+ {
+ uint32_t address = ((m_videoram[ma + cx] + m_tile_bank) << 4) | ra;
+ uint32_t tile_data = gfx[address] | (gfx[address + 0x2000] << 8) | (gfx[address + 0x4000] << 16);
+
+ for(int x = 0; x < TILE_WIDTH; ++x)
+ {
+ bitmap.pix(y, (cx * TILE_WIDTH + x) ^ 1) = palette[tile_data & 0x0f];
+ tile_data >>= 4;
+ }
+ }
+}
+
+void othello_state::othello_palette(palette_device &palette) const
+{
+ for (int i = 0; i < palette.entries(); i++)
+ palette.set_pen_color(i, rgb_t(0xff, 0x00, 0xff));
+
+ // only colors 2,3,7,9,c,d,f are used
+ palette.set_pen_color(0x02, rgb_t(0x00, 0xff, 0x00));
+ palette.set_pen_color(0x03, rgb_t(0xff, 0x7f, 0x00));
+ palette.set_pen_color(0x07, rgb_t(0x00, 0x00, 0x00));
+ palette.set_pen_color(0x09, rgb_t(0xff, 0x00, 0x00));
+ palette.set_pen_color(0x0c, rgb_t(0x00, 0x00, 0xff));
+ palette.set_pen_color(0x0d, rgb_t(0x7f, 0x7f, 0x00));
+ palette.set_pen_color(0x0f, rgb_t(0xff, 0xff, 0xff));
+}
+
+void othello_state::main_map(address_map &map)
+{
+ map(0x0000, 0x1fff).rom();
+ map(0x8000, 0x97ff).noprw(); /* not populated */
+ map(0x9800, 0x9fff).ram().share(m_videoram);
+ map(0xf000, 0xffff).ram();
+}
+
+uint8_t othello_state::unk_87_r()
+{
+ // bit 7 = ack/status from device connected to port 8a?
+ return 0;
+}
+
+void othello_state::unk_8a_w(uint8_t data)
+{
+ logerror("8a -> %x\n", data);
+}
+
+void othello_state::upd7751_command_w(uint8_t data)
+{
+ m_upd7751->set_input_line(0, (data & 0x80) ? CLEAR_LINE : ASSERT_LINE);
+ m_upd7751_command = data;
+}
+
+uint8_t othello_state::upd7751_busy_r()
+{
+ return m_upd7751_busy;
+}
+
+uint8_t othello_state::sound_ack_r()
+{
+ return m_ack_data;
+}
+
+void othello_state::unk_8f_w(uint8_t data)
+{
+ logerror("8f -> %x\n", data);
+}
+
+void othello_state::tilebank_w(uint8_t data)
+{
+ m_tile_bank = (data == 0x0f) ? 0x100 : 0x00;
+ logerror("tilebank -> %x\n", data);
+}
+
+void othello_state::main_portmap(address_map &map)
+{
+ map.global_mask(0xff);
+ map(0x08, 0x08).w("crtc", FUNC(mc6845_device::address_w));
+ map(0x09, 0x09).rw("crtc", FUNC(mc6845_device::register_r), FUNC(mc6845_device::register_w));
+ map(0x80, 0x80).portr("INP");
+ map(0x81, 0x81).portr("SYSTEM");
+ map(0x83, 0x83).portr("DSW");
+ map(0x86, 0x86).w(FUNC(othello_state::tilebank_w));
+ map(0x87, 0x87).r(FUNC(othello_state::unk_87_r));
+ map(0x8a, 0x8a).w(FUNC(othello_state::unk_8a_w));
+ map(0x8c, 0x8c).rw(FUNC(othello_state::upd7751_busy_r), FUNC(othello_state::upd7751_command_w));
+ map(0x8d, 0x8d).r(FUNC(othello_state::sound_ack_r)).w(m_soundlatch, FUNC(generic_latch_8_device::write));
+ map(0x8f, 0x8f).w(FUNC(othello_state::unk_8f_w));
+}
+
+uint8_t othello_state::latch_r()
+{
+ uint8_t retval = m_soundlatch->read();
+ if (!machine().side_effects_disabled())
+ m_soundlatch->clear_w();
+
+ return retval;
+}
+
+void othello_state::ay_select_w(uint8_t data)
+{
+ m_ay_select = data;
+}
+
+void othello_state::ack_w(uint8_t data)
+{
+ m_ack_data = data;
+}
+
+void othello_state::ay_address_w(uint8_t data)
+{
+ if (m_ay_select & 1) m_ay[0]->address_w(data);
+ if (m_ay_select & 2) m_ay[1]->address_w(data);
+}
+
+void othello_state::ay_data_w(uint8_t data)
+{
+ if (m_ay_select & 1) m_ay[0]->data_w(data);
+ if (m_ay_select & 2) m_ay[1]->data_w(data);
+}
+
+void othello_state::audio_map(address_map &map)
+{
+ map(0x0000, 0x1fff).rom();
+ map(0x8000, 0x83ff).ram();
+}
+
+void othello_state::audio_portmap(address_map &map)
+{
+ map.global_mask(0xff);
+ map(0x00, 0x00).r(FUNC(othello_state::latch_r));
+ map(0x01, 0x01).w(FUNC(othello_state::ay_data_w));
+ map(0x03, 0x03).w(FUNC(othello_state::ay_address_w));
+ map(0x04, 0x04).w(FUNC(othello_state::ack_w));
+ map(0x08, 0x08).w(FUNC(othello_state::ay_select_w));
+}
+
+template<int Shift>
+void othello_state::upd7751_rom_addr_w(uint8_t data)
+{
+ // P4 - address lines 0-3
+ // P5 - address lines 4-7
+ // P6 - address lines 8-11
+ m_sound_addr = (m_sound_addr & ~(0x00f << Shift)) | ((data & 0x0f) << Shift);
+}
+
+void othello_state::upd7751_rom_select_w(uint8_t data)
+{
+ // P7 - ROM selects
+ m_sound_addr &= 0xfff;
+
+ if (!BIT(data, 0)) m_sound_addr |= 0x0000;
+ if (!BIT(data, 1)) m_sound_addr |= 0x1000;
+ if (!BIT(data, 2)) m_sound_addr |= 0x2000;
+ if (!BIT(data, 3)) m_sound_addr |= 0x3000;
+}
+
+uint8_t othello_state::upd7751_rom_r()
+{
+ return m_upd7751_data[m_sound_addr];
+}
+
+uint8_t othello_state::upd7751_command_r()
+{
+ return m_upd7751_command << 4 | 0x0f;
+}
+
+void othello_state::upd7751_p2_w(uint8_t data)
+{
+ // write to P2; low 4 bits go to 8243
+ m_i8243->p2_w(data & 0x0f);
+
+ // output of bit $80 indicates we are ready (1) or busy (0)
+ // no other outputs are used
+ m_upd7751_busy = data & 0x80;
+}
+
+static INPUT_PORTS_START( othello )
+ PORT_START("DSW")
+ PORT_DIPNAME( 0x01, 0x00, DEF_STR( Cabinet ) ) PORT_DIPLOCATION("SW1:1")
+ PORT_DIPSETTING( 0x00, DEF_STR( Upright ) )
+ PORT_DIPSETTING( 0x01, DEF_STR( Cocktail ) )
+ PORT_DIPNAME( 0x06, 0x06, DEF_STR( Coinage ) ) PORT_DIPLOCATION("SW1:2,3")
+ PORT_DIPSETTING( 0x00, DEF_STR( 3C_1C ) )
+ PORT_DIPSETTING( 0x02, DEF_STR( 2C_1C ) )
+ PORT_DIPSETTING( 0x06, DEF_STR( 1C_1C ) )
+ PORT_DIPSETTING( 0x04, DEF_STR( 1C_2C ) )
+ PORT_DIPNAME( 0x08, 0x00, "Limit for Matta" ) PORT_DIPLOCATION("SW1:4")
+ PORT_DIPSETTING( 0x08, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( On ) )
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_DIPLOCATION("SW1:5") /* stored at $fd1e */
+ PORT_DIPNAME( 0x60, 0x00, "Timer (seconds)" ) PORT_DIPLOCATION("SW1:6,7")
+ PORT_DIPSETTING( 0x60, "4" )
+ PORT_DIPSETTING( 0x40, "6" )
+ PORT_DIPSETTING( 0x20, "8" )
+ PORT_DIPSETTING( 0x00, "10" )
+ PORT_DIPNAME( 0x80, 0x00, DEF_STR( Difficulty ) ) PORT_DIPLOCATION("SW1:8")
+ PORT_DIPSETTING( 0x00, DEF_STR( Easy ) )
+ PORT_DIPSETTING( 0x80, DEF_STR( Hard ) )
+
+ PORT_START("INP")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_PLAYER(2)
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(2)
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_PLAYER(2)
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_PLAYER(2)
+
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT )
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT )
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN )
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_JOYSTICK_UP )
+
+ PORT_START("SYSTEM")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(2)
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(2)
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_BUTTON2 )
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_BUTTON1 )
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_COIN2 )
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_START2 )
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_START1 )
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_COIN1 )
+INPUT_PORTS_END
+
+void othello_state::machine_start()
+{
+ save_item(NAME(m_tile_bank));
+ save_item(NAME(m_ay_select));
+ save_item(NAME(m_ack_data));
+ save_item(NAME(m_upd7751_command));
+ save_item(NAME(m_sound_addr));
+ save_item(NAME(m_upd7751_busy));
+}
+
+void othello_state::machine_reset()
+{
+ m_tile_bank = 0;
+ m_ay_select = 0;
+ m_ack_data = 0;
+ m_upd7751_command = 0;
+ m_sound_addr = 0;
+ m_upd7751_busy = 0;
+}
+
+void othello_state::othello(machine_config &config)
+{
+ // basic machine hardware
+ Z80(config, m_maincpu, 8_MHz_XTAL / 2);
+ m_maincpu->set_addrmap(AS_PROGRAM, &othello_state::main_map);
+ m_maincpu->set_addrmap(AS_IO, &othello_state::main_portmap);
+ m_maincpu->set_vblank_int("screen", FUNC(othello_state::irq0_line_hold));
+
+ z80_device &audiocpu(Z80(config, "audiocpu", 3.579545_MHz_XTAL / 2));
+ audiocpu.set_addrmap(AS_PROGRAM, &othello_state::audio_map);
+ audiocpu.set_addrmap(AS_IO, &othello_state::audio_portmap);
+
+ UPD7751(config, m_upd7751, 6_MHz_XTAL);
+ m_upd7751->t1_in_cb().set_constant(0); // labelled as "TEST", connected to ground
+ m_upd7751->p2_in_cb().set(FUNC(othello_state::upd7751_command_r));
+ m_upd7751->bus_in_cb().set(FUNC(othello_state::upd7751_rom_r));
+ m_upd7751->p1_out_cb().set("dac", FUNC(dac_byte_interface::data_w));
+ m_upd7751->p2_out_cb().set(FUNC(othello_state::upd7751_p2_w));
+ m_upd7751->prog_out_cb().set(m_i8243, FUNC(i8243_device::prog_w));
+
+ config.set_perfect_quantum(m_maincpu);
+
+ I8243(config, m_i8243);
+ m_i8243->p4_out_cb().set(FUNC(othello_state::upd7751_rom_addr_w<0>));
+ m_i8243->p5_out_cb().set(FUNC(othello_state::upd7751_rom_addr_w<4>));
+ m_i8243->p6_out_cb().set(FUNC(othello_state::upd7751_rom_addr_w<8>));
+ m_i8243->p7_out_cb().set(FUNC(othello_state::upd7751_rom_select_w));
+
+ // video hardware
+ screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
+ screen.set_refresh_hz(60);
+ screen.set_vblank_time(ATTOSECONDS_IN_USEC(0));
+ screen.set_size(64*6, 64*8);
+ screen.set_visarea(0*8, 64*6-1, 0*8, 64*8-1);
+ screen.set_screen_update("crtc", FUNC(hd6845s_device::screen_update));
+
+ PALETTE(config, m_palette, FUNC(othello_state::othello_palette), 0x10);
+
+ hd6845s_device &crtc(HD6845S(config, "crtc", 1000000 /* ? MHz */)); // HD46505SP @ CPU clock
+ crtc.set_screen("screen");
+ crtc.set_show_border_area(false);
+ crtc.set_char_width(TILE_WIDTH);
+ crtc.set_update_row_callback(FUNC(othello_state::crtc_update_row));
+
+ // sound hardware
+ SPEAKER(config, "speaker").front_center();
+
+ GENERIC_LATCH_8(config, m_soundlatch);
+
+ AY8910(config, m_ay[0], 3.579545_MHz_XTAL / 2).add_route(ALL_OUTPUTS, "speaker", 0.25);
+ AY8910(config, m_ay[1], 3.579545_MHz_XTAL / 2).add_route(ALL_OUTPUTS, "speaker", 0.25);
+
+ DAC_8BIT_R2R(config, "dac").add_route(ALL_OUTPUTS, "speaker", 0.25); // unknown DAC
+}
+
+ROM_START( othello )
+ ROM_REGION( 0x10000, "maincpu", 0 )
+ ROM_LOAD( "4.ic59", 0x0000, 0x2000, CRC(9f82fe14) SHA1(59600264ccce787383827fc5aa0f2c23728f6946))
+
+ ROM_REGION( 0x10000, "audiocpu", 0 )
+ ROM_LOAD( "3.ic32", 0x0000, 0x2000, CRC(2bb4f75d) SHA1(29a659031acf0d50f374f440b8d353bcf98145a0))
+
+ ROM_REGION( 0x1000, "upd7751", 0 ) // 1k for 7751 onboard ROM
+ ROM_LOAD( "7751.bin", 0x0000, 0x0400, CRC(6a9534fc) SHA1(67ad94674db5c2aab75785668f610f6f4eccd158) )
+
+ ROM_REGION( 0x4000, "upd7751data", 0 ) // 7751 sound data
+ ROM_LOAD( "1.ic48", 0x0000, 0x2000, CRC(c3807dea) SHA1(d6339380e1239f3e20bcca2fbc673ad72e9ca608))
+ ROM_LOAD( "2.ic49", 0x2000, 0x2000, CRC(a945f3e7) SHA1(ea18efc18fda63ce1747287bbe2a9704b08daff8))
+
+ ROM_REGION( 0x6000, "gfx", 0 )
+ ROM_LOAD( "5.ic40", 0x0000, 0x2000, CRC(45fdc1ab) SHA1(f30f6002e3f34a647effac8b0116c8ed064e226a))
+ ROM_LOAD( "6.ic41", 0x2000, 0x2000, CRC(467a731f) SHA1(af80e854522e53fb1b9af7945b2c803a654c6f65))
+ ROM_LOAD( "7.ic42", 0x4000, 0x2000, CRC(a76705f7) SHA1(b7d2a65d65d065732ddd0b3b738749369b382b48))
+ROM_END
+
+} // anonymous namespace
+
+
+GAME( 1984, othello, 0, othello, othello, othello_state, empty_init, ROT0, "Success", "Othello (version 3.0)", MACHINE_WRONG_COLORS | MACHINE_SUPPORTS_SAVE )