diff --git a/src/mame/drivers/summit.cpp b/src/mame/drivers/summit.cpp
index b41357d3ac2..9604b7e7117 100644
--- a/src/mame/drivers/summit.cpp
+++ b/src/mame/drivers/summit.cpp
@@ -1,327 +1,400 @@
-// license:BSD-3-Clause
-// copyright-holders:David Haywood
-/*
+// license: BSD-3-Clause
+// copyright-holders: David Haywood, Dirk Best
+/***************************************************************************
 
-Summit Coin - Push Over (c)1981
-Video Fruit Machine
+    Push-Over
 
-see:
-http://www.youtube.com/watch?v=2vtAwkP7JyM
-http://www.youtube.com/watch?v=xx7b5Zd1Qvc
+    © 1981 Summit Coin
 
-HW could be Galaxian-like
+    Video Fruit Machine
 
-needs inputs, prom decode, sound, artwork (lamps), probably some irq masking and the like
+    TODO:
+    - Scrolling is wrong
+    - Missing graphics at top and right (pound values)
+    - Palette (currently handmade)
+    - Sound (discrete?)
+    - Better artwork
 
-*/
+    Notes:
+    - https://www.youtube.com/watch?v=2vtAwkP7JyM
+    - https://www.youtube.com/watch?v=xx7b5Zd1Qvc
+    - https://patents.google.com/patent/GB2106293A/en
+
+***************************************************************************/
 
 #include "emu.h"
 #include "cpu/z80/z80.h"
-#include "sound/ay8910.h"
-#include "video/mc6845.h"
 #include "emupal.h"
 #include "screen.h"
+#include "tilemap.h"
+#include "speaker.h"
 
+#include "summit.lh"
+
+
+//**************************************************************************
+//  TYPE DEFINITIONS
+//**************************************************************************
 
 class summit_state : public driver_device
 {
 public:
 	summit_state(const machine_config &mconfig, device_type type, const char *tag) :
 		driver_device(mconfig, type, tag),
-		m_attr(*this, "attr"),
-		m_vram(*this, "vram"),
 		m_maincpu(*this, "maincpu"),
 		m_gfxdecode(*this, "gfxdecode"),
-		m_palette(*this, "palette")
+		m_palette(*this, "palette"),
+		m_attr(*this, "attr"),
+		m_vram(*this, "vram"),
+		m_lamps(*this, "lamp_%u", 0U)
 	{ }
 
 	void summit(machine_config &config);
 
 protected:
-	virtual void video_start() override;
+	virtual void machine_start() override;
 
 private:
-	required_shared_ptr<uint8_t> m_attr;
-	required_shared_ptr<uint8_t> m_vram;
 	required_device<cpu_device> m_maincpu;
 	required_device<gfxdecode_device> m_gfxdecode;
 	required_device<palette_device> m_palette;
+	required_shared_ptr<uint8_t> m_attr;
+	required_shared_ptr<uint8_t> m_vram;
+
+	output_finder<16> m_lamps;
 
-	DECLARE_WRITE8_MEMBER(out_w);
-	void summit_palette(palette_device &palette) const;
-	uint32_t screen_update_summit(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
 	void mainmap(address_map &map);
+
+	void sound_w(uint8_t data);
+	void out2_w(uint8_t data);
+	void out3_w(uint8_t data);
+	void lamps1_w(uint8_t data);
+	void lamps2_w(uint8_t data);
+
+	void vram_w(offs_t offset, uint8_t data);
+
+	void summit_palette(palette_device &palette) const;
+	TILE_GET_INFO_MEMBER(tile_info);
+	uint32_t screen_update_summit(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
+
+	tilemap_t *m_tilemap;
 };
 
 
-void summit_state::video_start()
+//**************************************************************************
+//  ADDRESS MAPS
+//**************************************************************************
+
+void summit_state::mainmap(address_map &map)
 {
+	map.global_mask(0x3fff);
+	map(0x0000, 0x17ff).rom();
+	map(0x2000, 0x23ff).ram().share("attr");
+	map(0x2800, 0x2bff).ram().w(FUNC(summit_state::vram_w)).share("vram");
+	map(0x3000, 0x31ff).ram();
+	map(0x3800, 0x3800).portr("IN0");
+	map(0x3800, 0x3800).w(FUNC(summit_state::sound_w));
+	map(0x3880, 0x3880).w(FUNC(summit_state::out2_w));
+	map(0x3900, 0x3900).portr("IN1");
+	map(0x3900, 0x3900).w(FUNC(summit_state::out3_w));
+	map(0x3980, 0x3980).w(FUNC(summit_state::lamps1_w));
+	map(0x3a00, 0x3a00).portr("IN2");
+	map(0x3a00, 0x3a00).w(FUNC(summit_state::lamps2_w));
+	map(0x3b00, 0x3b00).portr("IN3");
+}
+
+
+//**************************************************************************
+//  INPUT PORT DEFINITIONS
+//**************************************************************************
+
+static INPUT_PORTS_START( summit )
+	PORT_START("IN0")
+	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_POKER_CANCEL )
+	PORT_DIPNAME( 0x02, 0x02, "IN0-02" )		// tilt?
+	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
+	PORT_DIPSETTING(    0x02, DEF_STR( Off ) )
+	PORT_DIPNAME( 0x04, 0x04, "IN0-04" )
+	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
+	PORT_DIPSETTING(    0x04, DEF_STR( Off ) )
+	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_POKER_HOLD1 )
+	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_POKER_HOLD2 )
+	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_POKER_HOLD3 )
+	PORT_DIPNAME( 0x40, 0x40, "Percentage 02" )		// payout percentage
+	PORT_DIPSETTING(    0x00, DEF_STR( On ) )	// 72
+	PORT_DIPSETTING(    0x40, DEF_STR( Off ) )	// 70
+	PORT_DIPNAME( 0x80, 0x80, "IN0-80" )
+	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
+	PORT_DIPSETTING(    0x80, DEF_STR( Off ) )
+
+	PORT_START("IN1")
+	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_NAME("Right / Gamble")
+	PORT_DIPNAME( 0x02, 0x02, "IN1-02" )
+	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
+	PORT_DIPSETTING(    0x02, DEF_STR( Off ) )
+	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_NAME("Left / Collect")
+	PORT_DIPNAME( 0x08, 0x08, "IN1-08" )
+	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
+	PORT_DIPSETTING(    0x08, DEF_STR( Off ) )
+	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_NAME("Down")
+	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_JOYSTICK_UP )  PORT_NAME("Up")
+	PORT_DIPNAME( 0x40, 0x40, "Percentage 04" )		// payout percentage
+	PORT_DIPSETTING(    0x00, DEF_STR( On ) )	// 74
+	PORT_DIPSETTING(    0x40, DEF_STR( Off ) )	// 70
+	PORT_DIPNAME( 0x80, 0x80, "IN1-80" )
+	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
+	PORT_DIPSETTING(    0x80, DEF_STR( Off ) )
+
+	PORT_START("IN2")
+	PORT_DIPNAME( 0x01, 0x01, "Token Refill" )
+	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
+	PORT_DIPSETTING(    0x01, DEF_STR( Off ) )
+	PORT_DIPNAME( 0x02, 0x02, "IN2-02" )
+	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
+	PORT_DIPSETTING(    0x02, DEF_STR( Off ) )
+	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_GAMBLE_BOOK ) PORT_TOGGLE
+	PORT_DIPNAME( 0x08, 0x08, "IN2-08" )
+	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
+	PORT_DIPSETTING(    0x08, DEF_STR( Off ) )
+	PORT_DIPNAME( 0x10, 0x10, "IN2-10" )		// output to 0x3a00 bit 3
+	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
+	PORT_DIPSETTING(    0x10, DEF_STR( Off ) )
+	PORT_DIPNAME( 0x20, 0x20, "IN2-20" )		// output to 0x3880 bit 3, 0x3a00 bit 1
+	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
+	PORT_DIPSETTING(    0x20, DEF_STR( Off ) )
+	PORT_DIPNAME( 0x40, 0x40, "Percentage 08" )		// payout percentage
+	PORT_DIPSETTING(    0x00, DEF_STR( On ) )	// 78
+	PORT_DIPSETTING(    0x40, DEF_STR( Off ) )	// 70
+	PORT_DIPNAME( 0x80, 0x80, "IN2-80" )
+	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
+	PORT_DIPSETTING(    0x80, DEF_STR( Off ) )
+
+	PORT_START("IN3")
+	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_POKER_BET )	PORT_NAME("Start")
+	PORT_DIPNAME( 0x02, 0x02, "IN3-02" )
+	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
+	PORT_DIPSETTING(    0x02, DEF_STR( Off ) )
+	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_COIN1 )	PORT_NAME("50p")
+	PORT_DIPNAME( 0x08, 0x08, "IN3-04" )
+	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
+	PORT_DIPSETTING(    0x08, DEF_STR( Off ) )
+	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_COIN2     ) PORT_NAME("Token")
+	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_COIN3     ) PORT_NAME("Cash")
+	PORT_DIPNAME( 0x40, 0x40, "Percentage 16" )		// payout percentage
+	PORT_DIPSETTING(    0x00, DEF_STR( On ) )	// 86
+	PORT_DIPSETTING(    0x40, DEF_STR( Off ) )	// 70
+	PORT_DIPNAME( 0x80, 0x80, "IN3-80" )
+	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
+	PORT_DIPSETTING(    0x80, DEF_STR( Off ) )
+INPUT_PORTS_END
+
+
+//**************************************************************************
+//  VIDEO EMULATION
+//**************************************************************************
+
+void summit_state::vram_w(offs_t offset, uint8_t data)
+{
+	if (offset < 0x20)
+		m_tilemap->set_scrollx(offset, data);
+
+	m_vram[offset] = data;
 }
 
 uint32_t summit_state::screen_update_summit(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
 {
-	gfx_element *gfx = m_gfxdecode->gfx(0);
-	int count = 0x0000;
+	m_tilemap->mark_all_dirty();
+	m_tilemap->draw(screen, bitmap, cliprect, 0, 0);
 
-	int y,x;
-
-
-	for (y=0;y<32;y++)
-	{
-		for (x=0;x<32;x++)
-		{
-			int tile = (m_vram[count] | ((m_attr[count]&1)<<8) );
-			gfx->opaque(bitmap,cliprect,tile,0,0,0,x*8,y*8);
-
-			count++;
-		}
-	}
 	return 0;
 }
 
-WRITE8_MEMBER(summit_state::out_w)
+TILE_GET_INFO_MEMBER(summit_state::tile_info)
 {
+	// attribute bit 0 used for both tile index and color?
+
+	uint8_t attr = m_attr[(tile_index)];
+	uint16_t tile = (BIT(attr, 0) << 8) | m_vram[tile_index];
+
+	tileinfo.set(0, tile, attr & 0x0f, 0);
 }
 
-
-void summit_state::mainmap(address_map &map)
-{
-	map(0x0000, 0x17ff).rom();
-
-	map(0x2000, 0x23ff).ram().share("attr");
-	map(0x2800, 0x2bff).ram().share("vram");
-
-	map(0x3800, 0x3800).portr("IN0");
-//  map(0x3880, 0x3880).w(FUNC(summit_state::out_w));
-	map(0x3900, 0x3900).portr("IN1").w(FUNC(summit_state::out_w)); // lamps
-//  map(0x3980, 0x3980).w(FUNC(summit_state::out_w));
-	map(0x3a00, 0x3a00).portr("IN2"); //.w(FUNC(summit_state::out_w));
-	map(0x3b00, 0x3b00).portr("IN3");
-
-	map(0x7000, 0x71ff).ram();
-}
-
-
-
-static INPUT_PORTS_START( summit )
-	PORT_START("IN0")
-	PORT_DIPNAME( 0x01, 0x01, "IN0" )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x01, DEF_STR( On ) )
-	PORT_DIPNAME( 0x02, 0x02, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x02, DEF_STR( On ) )
-	PORT_DIPNAME( 0x04, 0x04, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x04, DEF_STR( On ) )
-	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_BUTTON3 ) // Hold1
-	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON4 ) // Hold2
-	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON5 ) // Hold3
-	PORT_DIPNAME( 0x40, 0x40, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x40, DEF_STR( On ) )
-	PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x80, DEF_STR( On ) )
-
-	PORT_START("IN1")
-	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_BUTTON2 ) // Gamble / Left
-	PORT_DIPNAME( 0x02, 0x02, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x02, DEF_STR( On ) )
-	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_BUTTON1 ) // Collect / Right
-	PORT_DIPNAME( 0x08, 0x08, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x08, DEF_STR( On ) )
-	PORT_DIPNAME( 0x10, 0x10, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x10, DEF_STR( On ) )
-	PORT_DIPNAME( 0x20, 0x20, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x20, DEF_STR( On ) )
-	PORT_DIPNAME( 0x40, 0x40, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x40, DEF_STR( On ) )
-	PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x80, DEF_STR( On ) )
-
-	PORT_START("IN2")
-	PORT_DIPNAME( 0x01, 0x01, "IN2" )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x01, DEF_STR( On ) )
-	PORT_DIPNAME( 0x02, 0x02, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x02, DEF_STR( On ) )
-	PORT_DIPNAME( 0x04, 0x04, "Game/Test" )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x04, DEF_STR( On ) )
-	PORT_DIPNAME( 0x08, 0x08, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x08, DEF_STR( On ) )
-	PORT_DIPNAME( 0x10, 0x10, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x10, DEF_STR( On ) )
-	PORT_DIPNAME( 0x20, 0x20, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x20, DEF_STR( On ) )
-	PORT_DIPNAME( 0x40, 0x40, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x40, DEF_STR( On ) )
-	PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x80, DEF_STR( On ) )
-
-	PORT_START("IN3")
-	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_START1 )
-	PORT_DIPNAME( 0x02, 0x02, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x02, DEF_STR( On ) )
-	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_COIN1 )
-	PORT_DIPNAME( 0x08, 0x08, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x08, DEF_STR( On ) )
-	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_COIN2     )
-	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_COIN3     )
-	PORT_DIPNAME( 0x40, 0x40, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x40, DEF_STR( On ) )
-	PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x80, DEF_STR( On ) )
-
-	PORT_START("IN4")
-	PORT_DIPNAME( 0x01, 0x01, "IN4" )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x01, DEF_STR( On ) )
-	PORT_DIPNAME( 0x02, 0x02, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x02, DEF_STR( On ) )
-	PORT_DIPNAME( 0x04, 0x04, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x04, DEF_STR( On ) )
-	PORT_DIPNAME( 0x08, 0x08, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x08, DEF_STR( On ) )
-	PORT_DIPNAME( 0x10, 0x10, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x10, DEF_STR( On ) )
-	PORT_DIPNAME( 0x20, 0x20, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x20, DEF_STR( On ) )
-	PORT_DIPNAME( 0x40, 0x40, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x40, DEF_STR( On ) )
-	PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x80, DEF_STR( On ) )
-
-	PORT_START("IN5")
-	PORT_DIPNAME( 0x01, 0x01, "IN5" )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x01, DEF_STR( On ) )
-	PORT_DIPNAME( 0x02, 0x02, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x02, DEF_STR( On ) )
-	PORT_DIPNAME( 0x04, 0x04, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x04, DEF_STR( On ) )
-	PORT_DIPNAME( 0x08, 0x08, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x08, DEF_STR( On ) )
-	PORT_DIPNAME( 0x10, 0x10, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x10, DEF_STR( On ) )
-	PORT_DIPNAME( 0x20, 0x20, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x20, DEF_STR( On ) )
-	PORT_DIPNAME( 0x40, 0x40, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x40, DEF_STR( On ) )
-	PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x80, DEF_STR( On ) )
-
-	PORT_START("IN6")
-	PORT_DIPNAME( 0x01, 0x01, "IN6" )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x01, DEF_STR( On ) )
-	PORT_DIPNAME( 0x02, 0x02, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x02, DEF_STR( On ) )
-	PORT_DIPNAME( 0x04, 0x04, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x04, DEF_STR( On ) )
-	PORT_DIPNAME( 0x08, 0x08, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x08, DEF_STR( On ) )
-	PORT_DIPNAME( 0x10, 0x10, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x10, DEF_STR( On ) )
-	PORT_DIPNAME( 0x20, 0x20, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x20, DEF_STR( On ) )
-	PORT_DIPNAME( 0x40, 0x40, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x40, DEF_STR( On ) )
-	PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x80, DEF_STR( On ) )
-
-	PORT_START("IN7")
-	PORT_DIPNAME( 0x01, 0x01, "IN7" )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x01, DEF_STR( On ) )
-	PORT_DIPNAME( 0x02, 0x02, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x02, DEF_STR( On ) )
-	PORT_DIPNAME( 0x04, 0x04, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x04, DEF_STR( On ) )
-	PORT_DIPNAME( 0x08, 0x08, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x08, DEF_STR( On ) )
-	PORT_DIPNAME( 0x10, 0x10, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x10, DEF_STR( On ) )
-	PORT_DIPNAME( 0x20, 0x20, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x20, DEF_STR( On ) )
-	PORT_DIPNAME( 0x40, 0x40, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x40, DEF_STR( On ) )
-	PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unknown ) )
-	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
-	PORT_DIPSETTING(    0x80, DEF_STR( On ) )
-INPUT_PORTS_END
-
 static const gfx_layout tiles8x8_layout =
 {
-	8,8,
+	8, 8,
 	RGN_FRAC(1,2),
 	2,
 	{ 0, RGN_FRAC(1,2) },
-	{ 7,6,5,4,3,2,1,0 },
+	{ 7, 6, 5, 4, 3, 2, 1, 0 },
 	{ 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8 },
 	8*8
 };
 
 static GFXDECODE_START( gfx_summit )
-	GFXDECODE_ENTRY( "gfx1", 0, tiles8x8_layout, 0, 1 )
+	GFXDECODE_ENTRY( "gfx1", 0, tiles8x8_layout, 0, 16 )
 GFXDECODE_END
 
+static constexpr rgb_t summit_pens[64] =
+{
+	{ 0x00, 0x00, 0x00 }, // 00: black
+	{ 0x00, 0x7f, 0x00 }, // 01: dark green
+	{ 0xff, 0xff, 0xff }, // 02: white
+	{ 0xff, 0x00, 0x00 }, // 03: red
+	{ 0xff, 0x00, 0xff }, // 04: ?
+	{ 0xff, 0x00, 0xff }, // 05: ?
+	{ 0xff, 0x00, 0xff }, // 06: ?
+	{ 0xff, 0x00, 0xff }, // 07: ?
+	{ 0x00, 0x00, 0x00 }, // 08: black
+	{ 0x7f, 0x00, 0x00 }, // 09: brown
+	{ 0xff, 0xff, 0xff }, // 0a: white
+	{ 0xff, 0x00, 0x00 }, // 0b: red
+	{ 0x00, 0x00, 0x00 }, // 0c: black
+	{ 0xff, 0x00, 0xff }, // 0d: ?
+	{ 0xff, 0x00, 0x00 }, // 0e: red
+	{ 0xff, 0x00, 0xff }, // 0f: ?
+	{ 0x00, 0x00, 0x00 }, // 10: black
+	{ 0xff, 0x7f, 0x00 }, // 11: orange
+	{ 0xff, 0xff, 0xff }, // 12: white
+	{ 0xff, 0xff, 0x7f }, // 13: light orange
+	{ 0xff, 0x00, 0xff }, // 14: ?
+	{ 0xff, 0x00, 0xff }, // 15: ?
+	{ 0xff, 0x00, 0xff }, // 16: ?
+	{ 0xff, 0x00, 0xff }, // 17: ?
+	{ 0x00, 0x00, 0x00 }, // 18: black
+	{ 0xff, 0x00, 0x00 }, // 19: red
+	{ 0xff, 0xff, 0xff }, // 1a: white
+	{ 0x00, 0x00, 0xff }, // 1b: blue
+	{ 0x00, 0x00, 0x00 }, // 1c: black
+	{ 0xff, 0x00, 0xff }, // 1d: ?
+	{ 0x00, 0x00, 0xff }, // 1e: blue
+	{ 0xff, 0x00, 0xff }, // 1f: ?
+	{ 0x00, 0x00, 0x00 }, // 20: black
+	{ 0xff, 0x00, 0x00 }, // 21: red
+	{ 0xff, 0xff, 0x00 }, // 22: yellow
+	{ 0x00, 0x00, 0xff }, // 23: blue
+	{ 0xff, 0x00, 0xff }, // 24: ?
+	{ 0xff, 0x00, 0xff }, // 25: ?
+	{ 0xff, 0x00, 0xff }, // 26: ?
+	{ 0xff, 0x00, 0xff }, // 27: ?
+	{ 0x00, 0x00, 0x00 }, // 28: black
+	{ 0x00, 0x00, 0xff }, // 29: blue
+	{ 0xff, 0xff, 0xff }, // 2a: white
+	{ 0xff, 0xff, 0x00 }, // 2b: yellow
+	{ 0x00, 0x00, 0x00 }, // 2c: black
+	{ 0x00, 0x00, 0x00 }, // 2d: black
+	{ 0xff, 0xff, 0xff }, // 2e: white
+	{ 0xff, 0xff, 0xff }, // 2f: white
+	{ 0x00, 0x00, 0x00 }, // 30: black
+	{ 0x00, 0x00, 0xff }, // 31: blue
+	{ 0xff, 0xff, 0xff }, // 32: white
+	{ 0x7f, 0x00, 0x00 }, // 33: brown
+	{ 0xff, 0x00, 0xff }, // 34: ?
+	{ 0xff, 0x00, 0xff }, // 35: ?
+	{ 0xff, 0x00, 0xff }, // 36: ?
+	{ 0xff, 0x00, 0xff }, // 37: ?
+	{ 0x00, 0x00, 0x00 }, // 38: black
+	{ 0xff, 0x00, 0x00 }, // 39: red
+	{ 0x7f, 0x00, 0x00 }, // 3a: brown
+	{ 0x00, 0x7f, 0x00 }, // 3b: dark green
+	{ 0x00, 0x00, 0x00 }, // 3c: black
+	{ 0xff, 0x00, 0xff }, // 3d: ?
+	{ 0x00, 0x7f, 0x00 }, // 3e: dark green
+	{ 0xff, 0x00, 0xff }  // 3f: ?
+};
+
 void summit_state::summit_palette(palette_device &palette) const
 {
+	palette.set_pen_colors(0, summit_pens);
 }
 
+
+//**************************************************************************
+//  AUDIO EMULATION
+//**************************************************************************
+
+void summit_state::sound_w(uint8_t data)
+{
+	// likely connected to some kind of discrete audio hardware
+
+	// 0x00 mute?
+	// 0x14 reel bump
+	// 0x42 go sound
+	// 0x48 gamble/collect win
+	// 0x80 mute?
+}
+
+
+//**************************************************************************
+//  MACHINE EMULATION
+//**************************************************************************
+
+void summit_state::out2_w(uint8_t data)
+{
+	if (0)
+		logerror("out2: %02x  %d %d %d %d  %d %d %d %d\n", data, BIT(data, 7), BIT(data, 6), BIT(data, 5), BIT(data, 4), BIT(data, 3), BIT(data, 2), BIT(data, 1), BIT(data, 0));
+}
+
+void summit_state::out3_w(uint8_t data)
+{
+	// 765-----  not used?
+	// ---4----  coin lockout?
+	// ----3---  cash in
+	// -----2--  10p out
+	// ------1-  toggles rapidly
+	// -------0  unknown
+	
+//	machine().bookkeeping().coin_lockout_w(0, BIT(data, 4));
+	machine().bookkeeping().coin_counter_w(0, BIT(data, 3));
+	machine().bookkeeping().coin_counter_w(1, BIT(data, 2));
+}
+
+void summit_state::lamps1_w(uint8_t data)
+{
+	// 76------  not used?
+	// --5-----  collect/win lamp
+	// ---4----  collect/win lamp
+	// ----3---  cancel lamp
+	// -----2--  hold 3 lamp
+	// ------1-  hold 2 lamp
+	// -------0  hold 1 lamp
+
+	for (int i  = 0; i < 8; i++)
+		m_lamps[i] = BIT(data, i);
+}
+
+void summit_state::lamps2_w(uint8_t data)
+{
+	// 765-----  not used?
+	// ---4----  gamble lamp
+	// ----3---  active when IN2-10 active
+	// -----2--  go lamp
+	// ------1-  active when IN2-20 active
+	// -------0  start lamp
+
+	for (int i  = 0; i < 8; i++)
+		m_lamps[8 + i] = BIT(data, i);
+}
+
+void summit_state::machine_start()
+{
+	m_lamps.resolve();
+
+	m_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(summit_state::tile_info)), TILEMAP_SCAN_ROWS, 8, 8, 32, 32);
+	m_tilemap->set_scroll_rows(32);
+}
+
+
+//**************************************************************************
+//  MACHINE DEFINTIONS
+//**************************************************************************
+
 void summit_state::summit(machine_config &config)
 {
-	/* basic machine hardware */
 	Z80(config, m_maincpu, 4000000);
 	m_maincpu->set_addrmap(AS_PROGRAM, &summit_state::mainmap);
 	m_maincpu->set_vblank_int("screen", FUNC(summit_state::irq0_line_hold));
 
-	/* video hardware */
+	// video hardware
 	screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
 	screen.set_refresh_hz(60);
 	screen.set_vblank_time(ATTOSECONDS_IN_USEC(0));
@@ -330,12 +403,22 @@ void summit_state::summit(machine_config &config)
 	screen.set_screen_update(FUNC(summit_state::screen_update_summit));
 
 	GFXDECODE(config, m_gfxdecode, m_palette, gfx_summit);
-	PALETTE(config, m_palette, FUNC(summit_state::summit_palette), 256);
+
+	PALETTE(config, m_palette, FUNC(summit_state::summit_palette), 64);
+
+	// sound hardware
+	SPEAKER(config, "mono").front_center();
+
+	config.set_default_layout(layout_summit);
 }
 
 
+//**************************************************************************
+//  ROM DEFINITIONS
+//**************************************************************************
+
 ROM_START( pushover )
-	ROM_REGION( 0x10000, "maincpu", 0 )
+	ROM_REGION( 0x1800, "maincpu", 0 )
 	ROM_LOAD( "po40.bin", 0x0000, 0x0800, CRC(eb612cf7) SHA1(93d6b4d5a3c275cc27bece6f1fb1e8be7c6997bf) )
 	ROM_LOAD( "po41.bin", 0x0800, 0x0800, CRC(268fd1b2) SHA1(a2421807cb38901ec7c24a8c6eecb34677235c21) )
 	ROM_LOAD( "po42.bin", 0x1000, 0x0800, CRC(c0bb3f19) SHA1(8e773cc9503755a24428f9b0bbad1721a38e2c54) )
@@ -347,11 +430,16 @@ ROM_START( pushover )
 	ROM_LOAD( "pu8.bin", 0x1800, 0x0800, CRC(e7da3be6) SHA1(b02aceef84860cdc9190b73ffe3fa8173e210682) )
 
 	ROM_REGION( 0x1000, "proms", 0 )
-	ROM_LOAD( "prom1.bin", 0x0000, 0x0400, CRC(2d947698) SHA1(85405a005fa6108e8d5ef5a7a12745ba05109661) )
-	ROM_LOAD( "prom2.bin", 0x0400, 0x0400, CRC(87e11191) SHA1(59da09621f1a3c827bb0c158295ac1744a960aa4) )
-	ROM_LOAD( "prom3.bin", 0x0800, 0x0400, CRC(fe0fb97a) SHA1(05c41988bd1fe18725023a1a67c1b3cae01b2028) )
-	ROM_LOAD( "prom4.bin", 0x0c00, 0x0400, CRC(ce26b2c4) SHA1(a44b7a05c0c72592fe6083244c785e9ed1149909) )
+	ROM_LOAD( "prom1.bin", 0x000, 0x400, CRC(2d947698) SHA1(85405a005fa6108e8d5ef5a7a12745ba05109661) )
+	ROM_LOAD( "prom2.bin", 0x400, 0x400, CRC(87e11191) SHA1(59da09621f1a3c827bb0c158295ac1744a960aa4) )
+	ROM_LOAD( "prom3.bin", 0x800, 0x400, CRC(fe0fb97a) SHA1(05c41988bd1fe18725023a1a67c1b3cae01b2028) )
+	ROM_LOAD( "prom4.bin", 0xc00, 0x400, CRC(ce26b2c4) SHA1(a44b7a05c0c72592fe6083244c785e9ed1149909) )
 ROM_END
 
 
-GAME( 1981, pushover,  0,    summit, summit, summit_state, empty_init, ROT270, "Summit Coin", "Push Over (Summit Coin)", MACHINE_NOT_WORKING|MACHINE_NO_SOUND|MACHINE_WRONG_COLORS )
+//**************************************************************************
+//  SYSTEM DRIVERS
+//**************************************************************************
+
+//    YEAR  NAME       PARENT  MACHINE  INPUT   CLASS         INIT        ROTATION  COMPANY        FULLNAME                   FLAGS
+GAME( 1981, pushover,  0,      summit,  summit, summit_state, empty_init, ROT270,   "Summit Coin", "Push-Over (Summit Coin)", MACHINE_NOT_WORKING | MACHINE_NO_SOUND | MACHINE_IMPERFECT_COLORS )
diff --git a/src/mame/layout/summit.lay b/src/mame/layout/summit.lay
new file mode 100644
index 00000000000..e6e54f0e560
--- /dev/null
+++ b/src/mame/layout/summit.lay
@@ -0,0 +1,112 @@
+<?xml version="1.0"?>
+<!--
+license: CC0
+copyright-holders: Dirk Best
+
+Simple layout for Push-Over (Summit Coin)
+-->
+
+<mamelayout version="2">
+	<element name="background"></element>
+
+	<element name="gamble" defstate="0">
+		<rect state="0"><color red="0.2" green="0.2" blue="0.0" /></rect>
+		<rect state="1"><color red="0.8" green="0.8" blue="0.0" /></rect>
+		<text string="GAMBLE"><color red="0.1" green="0.1" blue="0.1" /></text>
+	</element>
+
+	<element name="cancel" defstate="0">
+		<rect state="0"><color red="0.2" green="0.0" blue="0.0" /></rect>
+		<rect state="1"><color red="0.8" green="0.0" blue="0.0" /></rect>
+		<text string="CANCEL"><color red="0.1" green="0.1" blue="0.1" /></text>
+	</element>
+
+	<element name="hold" defstate="0">
+		<rect state="0"><color red="0.2" green="0.2" blue="0.0" /></rect>
+		<rect state="1"><color red="0.8" green="0.8" blue="0.0" /></rect>
+		<text string="HOLD"><color red="0.1" green="0.1" blue="0.1" /></text>
+	</element>
+
+	<element name="start" defstate="0">
+		<rect state="0"><color red="0.0" green="0.2" blue="0.0" /></rect>
+		<rect state="1"><color red="0.0" green="0.8" blue="0.0" /></rect>
+        <text string="START"><color red="0.1" green="0.1" blue="0.1" /></text>
+	</element>
+
+	<element name="go" defstate="0">
+		<rect state="0"><color red="0.2" green="0.2" blue="0.0" /></rect>
+		<rect state="1"><color red="0.8" green="0.8" blue="0.0" /></rect>
+        <text string="GO"><color red="0.1" green="0.1" blue="0.1" /></text>
+	</element>
+
+	<element name="red" defstate="0">
+		<rect state="0"><color red="0.2" green="0.0" blue="0.0" /></rect>
+		<rect state="1"><color red="0.8" green="0.0" blue="0.0" /></rect>
+	</element>
+
+	<element name="green" defstate="0">
+		<rect state="0"><color red="0.0" green="0.2" blue="0.0" /></rect>
+		<rect state="1"><color red="0.0" green="0.8" blue="0.0" /></rect>
+	</element>
+
+	<view name="Buttons">
+		<backdrop element="background">
+			<bounds x="0" y="0" width="600" height="800" />
+		</backdrop>
+		<screen index="0">
+			<bounds left="60" top="80" right="480" bottom="640" />
+		</screen>
+		<cpanel name="lamp_12" element="gamble">
+			<bounds x="10" y="20" width="70" height="35" />
+		</cpanel>
+		<cpanel name="lamp_3" element="cancel" inputtag="IN0" inputmask="0x01">
+			<bounds x="10" y="730" width="70" height="35" />
+		</cpanel>
+		<cpanel name="lamp_0" element="hold" inputtag="IN0" inputmask="0x08">
+			<bounds x="90" y="730" width="70" height="35" />
+		</cpanel>
+		<cpanel name="lamp_1" element="hold" inputtag="IN0" inputmask="0x10">
+			<bounds x="170" y="730" width="70" height="35" />
+		</cpanel>
+		<cpanel name="lamp_2" element="hold" inputtag="IN0" inputmask="0x20">
+			<bounds x="250" y="730" width="70" height="35" />
+		</cpanel>
+		<cpanel name="lamp_8" element="start" inputtag="IN3" inputmask="0x01">
+			<bounds x="400" y="730" width="70" height="35" />
+		</cpanel>
+		<cpanel name="lamp_10" element="go">
+			<bounds x="550" y="600" width="40" height="35" />
+		</cpanel>
+		<cpanel name="lamp_4" element="red">
+			<bounds x="200" y="20" width="40" height="35" />
+		</cpanel>
+		<cpanel name="lamp_5" element="green">
+			<bounds x="250" y="20" width="40" height="35" />
+		</cpanel>
+
+        <!-- Might not be lamps -->
+		<cpanel name="lamp_6" element="green">
+			<bounds x="550" y="200" width="20" height="20" />
+		</cpanel>
+		<cpanel name="lamp_7" element="green">
+			<bounds x="550" y="230" width="20" height="20" />
+		</cpanel>
+		<cpanel name="lamp_9" element="green">
+			<bounds x="550" y="260" width="20" height="20" />
+		</cpanel>
+		<cpanel name="lamp_11" element="green">
+			<bounds x="550" y="290" width="20" height="20" />
+		</cpanel>
+		<cpanel name="lamp_13" element="green">
+			<bounds x="550" y="320" width="20" height="20" />
+		</cpanel>
+		<cpanel name="lamp_14" element="green">
+			<bounds x="550" y="350" width="20" height="20" />
+		</cpanel>
+		<cpanel name="lamp_15" element="green">
+			<bounds x="550" y="380" width="20" height="20" />
+		</cpanel>
+
+    </view>
+
+</mamelayout>