diff --git a/src/mame/drivers/unkhorse.cpp b/src/mame/drivers/unkhorse.cpp
index 5ac829908cc..bf2aa329ce2 100644
--- a/src/mame/drivers/unkhorse.cpp
+++ b/src/mame/drivers/unkhorse.cpp
@@ -22,8 +22,7 @@ TODO:
 #include "emu.h"
 #include "cpu/i8085/i8085.h"
 #include "machine/i8155.h"
-#include "sound/dac.h"
-
+#include "sound/speaker.h"
 
 class horse_state : public driver_device
 {
@@ -31,35 +30,38 @@ public:
 	horse_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_speaker(*this, "speaker"),
+		m_inp_matrix(*this, "IN"),
 		m_video_ram(*this, "video_ram"),
-		m_color_ram(*this, "color_ram") { }
+		m_color_ram(*this, "color_ram")
+	{ }
 
 	required_device<cpu_device> m_maincpu;
-	required_device<dac_device> m_dac;
-
+	required_device<speaker_sound_device> m_speaker;
+	required_ioport_array<4> m_inp_matrix;
 	required_shared_ptr<UINT8> m_video_ram;
 	required_shared_ptr<UINT8> m_color_ram;
 
 	UINT8 m_output;
 
+	DECLARE_READ8_MEMBER(cram_trampoline_r) { return m_color_ram[offset & ~0x60]; }
+	DECLARE_WRITE8_MEMBER(cram_trampoline_w) { m_color_ram[offset & ~0x60] = data; }
 	DECLARE_READ8_MEMBER(input_r);
 	DECLARE_WRITE8_MEMBER(output_w);
 	DECLARE_WRITE_LINE_MEMBER(timer_out);
 
 	virtual void machine_start() override;
-
 	UINT32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
-
 	INTERRUPT_GEN_MEMBER(interrupt);
 };
 
-
 void horse_state::machine_start()
 {
 	save_item(NAME(m_output));
 }
 
+
+
 /***************************************************************************
 
   Video
@@ -84,6 +86,7 @@ UINT32 horse_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, c
 }
 
 
+
 /***************************************************************************
 
   I/O
@@ -94,7 +97,7 @@ static ADDRESS_MAP_START( horse_map, AS_PROGRAM, 8, horse_state )
 	AM_RANGE(0x0000, 0x37ff) AM_ROM
 	AM_RANGE(0x4000, 0x40ff) AM_DEVREADWRITE("i8155", i8155_device, memory_r, memory_w)
 	AM_RANGE(0x6000, 0x7fff) AM_RAM AM_SHARE("video_ram")
-	AM_RANGE(0x8000, 0x879f) AM_RAM AM_SHARE("color_ram") AM_MIRROR(0x0860)
+	AM_RANGE(0x8000, 0x87ff) AM_READWRITE(cram_trampoline_r, cram_trampoline_w) AM_SHARE("color_ram") AM_MIRROR(0x0800)
 ADDRESS_MAP_END
 
 static ADDRESS_MAP_START( horse_io_map, AS_IO, 8, horse_state )
@@ -104,15 +107,7 @@ ADDRESS_MAP_END
 
 READ8_MEMBER(horse_state::input_r)
 {
-	switch (m_output >> 6 & 3)
-	{
-		case 0: return ioport("IN0")->read();
-		case 1: return ioport("IN1")->read();
-		case 2: return ioport("IN2")->read();
-		default: break;
-	}
-
-	return 0xff;
+	return m_inp_matrix[m_output >> 6 & 3]->read();
 }
 
 WRITE8_MEMBER(horse_state::output_w)
@@ -124,10 +119,7 @@ WRITE8_MEMBER(horse_state::output_w)
 	// other bits: ?
 }
 
-WRITE_LINE_MEMBER(horse_state::timer_out)
-{
-	m_dac->write_signed8(state ? 0x7f : 0);
-}
+
 
 /***************************************************************************
 
@@ -136,7 +128,7 @@ WRITE_LINE_MEMBER(horse_state::timer_out)
 ***************************************************************************/
 
 static INPUT_PORTS_START( horse )
-	PORT_START("IN0")
+	PORT_START("IN.0")
 	PORT_DIPNAME( 0x07, 0x07, DEF_STR( Coinage ) )  PORT_DIPLOCATION("SW:1,2,3")
 	PORT_DIPSETTING( 0x01, DEF_STR( 1C_1C ) )
 	PORT_DIPSETTING( 0x02, DEF_STR( 1C_2C ) )
@@ -158,7 +150,7 @@ static INPUT_PORTS_START( horse )
 	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN )
 	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN )
 
-	PORT_START("IN1")
+	PORT_START("IN.1")
 	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_UNKNOWN )
 	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_UNKNOWN )
 	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_UNKNOWN )
@@ -168,7 +160,7 @@ static INPUT_PORTS_START( horse )
 	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN )
 	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN )
 
-	PORT_START("IN2")
+	PORT_START("IN.2")
 	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_UNKNOWN )
 	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_UNKNOWN )
 	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_UNKNOWN )
@@ -177,9 +169,13 @@ static INPUT_PORTS_START( horse )
 	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_GAMBLE_PAYOUT )
 	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_TILT )
 	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_COIN1 )
+
+	PORT_START("IN.3")
+	PORT_BIT( 0xff, IP_ACTIVE_LOW, IPT_UNKNOWN )
 INPUT_PORTS_END
 
 
+
 /***************************************************************************
 
   Machine Config
@@ -200,11 +196,10 @@ static MACHINE_CONFIG_START( horse, horse_state )
 	MCFG_CPU_IO_MAP(horse_io_map)
 	MCFG_CPU_VBLANK_INT_DRIVER("screen", horse_state,  interrupt)
 
-	MCFG_DEVICE_ADD("i8155", I8155, XTAL_12MHz / 2)
+	MCFG_DEVICE_ADD("i8155", I8155, XTAL_12MHz / 2) // port A input, B output, C output but unused
 	MCFG_I8155_IN_PORTA_CB(READ8(horse_state, input_r))
 	MCFG_I8155_OUT_PORTB_CB(WRITE8(horse_state, output_w))
-	//port C output (but unused)
-	MCFG_I8155_OUT_TIMEROUT_CB(WRITELINE(horse_state, timer_out))
+	MCFG_I8155_OUT_TIMEROUT_CB(DEVWRITELINE("speaker", speaker_sound_device, level_w))
 
 	/* video hardware */
 	MCFG_SCREEN_ADD("screen", RASTER)
@@ -214,17 +209,16 @@ static MACHINE_CONFIG_START( horse, horse_state )
 	MCFG_SCREEN_VISIBLE_AREA(0*8, 32*8-1, 1*8, 31*8-1)
 	MCFG_SCREEN_UPDATE_DRIVER(horse_state, screen_update)
 	MCFG_SCREEN_PALETTE("palette")
-
 	MCFG_PALETTE_ADD_3BIT_BGR("palette")
 
 	/* sound hardware */
 	MCFG_SPEAKER_STANDARD_MONO("mono")
-
-	MCFG_DAC_ADD("dac")
+	MCFG_SOUND_ADD("speaker", SPEAKER_SOUND, 0)
 	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25)
 MACHINE_CONFIG_END
 
 
+
 /***************************************************************************
 
   Game drivers