diff --git a/src/emu/machine/z80dma.c b/src/emu/machine/z80dma.c
index 846ea1ce794..03dfc297566 100644
--- a/src/emu/machine/z80dma.c
+++ b/src/emu/machine/z80dma.c
@@ -874,7 +874,7 @@ void z80dma_device::rdy_write_callback(int state)
 //  rdy_w - ready input
 //-------------------------------------------------
 
-void z80dma_device::rdy_w(int state)
+WRITE_LINE_MEMBER(z80dma_device::rdy_w)
 {
 	if (LOG) logerror("Z80DMA '%s' RDY: %d Active High: %d\n", tag(), state, READY_ACTIVE_HIGH);
 	machine().scheduler().synchronize(FUNC(static_rdy_write_callback), state, (void *)this);
@@ -885,7 +885,7 @@ void z80dma_device::rdy_w(int state)
 //  wait_w - wait input
 //-------------------------------------------------
 
-void z80dma_device::wait_w(int state)
+WRITE_LINE_MEMBER(z80dma_device::wait_w)
 {
 }
 
@@ -894,19 +894,7 @@ void z80dma_device::wait_w(int state)
 //  bai_w - bus acknowledge input
 //-------------------------------------------------
 
-void z80dma_device::bai_w(int state)
+WRITE_LINE_MEMBER(z80dma_device::bai_w)
 {
 }
 
-
-
-//**************************************************************************
-//  GLOBAL STUBS
-//**************************************************************************
-
-READ8_DEVICE_HANDLER( z80dma_r ) { return downcast<z80dma_device *>(device)->read(); }
-WRITE8_DEVICE_HANDLER( z80dma_w ) { downcast<z80dma_device *>(device)->write(data); }
-
-WRITE_LINE_DEVICE_HANDLER( z80dma_rdy_w ) { downcast<z80dma_device *>(device)->rdy_w(state); }
-WRITE_LINE_DEVICE_HANDLER( z80dma_wait_w ) { downcast<z80dma_device *>(device)->wait_w(state); }
-WRITE_LINE_DEVICE_HANDLER( z80dma_bai_w ) { downcast<z80dma_device *>(device)->bai_w(state); }
diff --git a/src/emu/machine/z80dma.h b/src/emu/machine/z80dma.h
index a0d813a055a..2b9a68b6bbf 100644
--- a/src/emu/machine/z80dma.h
+++ b/src/emu/machine/z80dma.h
@@ -88,9 +88,9 @@ public:
 	DECLARE_READ8_MEMBER( read ) { return read(); }
 	DECLARE_WRITE8_MEMBER( write ) { write(data); }
 
-	void rdy_w(int state);
-	void wait_w(int state);
-	void bai_w(int state);
+	DECLARE_WRITE_LINE_MEMBER(rdy_w);
+	DECLARE_WRITE_LINE_MEMBER(wait_w);
+	DECLARE_WRITE_LINE_MEMBER(bai_w);
 
 private:
 	// device-level overrides
@@ -163,23 +163,4 @@ private:
 // device type definition
 extern const device_type Z80DMA;
 
-
-
-//**************************************************************************
-//  FUNCTION PROTOTYPES
-//**************************************************************************
-
-// register access
-DECLARE_READ8_DEVICE_HANDLER( z80dma_r );
-DECLARE_WRITE8_DEVICE_HANDLER( z80dma_w );
-
-// ready
-WRITE_LINE_DEVICE_HANDLER( z80dma_rdy_w );
-
-// wait
-WRITE_LINE_DEVICE_HANDLER( z80dma_wait_w );
-
-// bus acknowledge in
-WRITE_LINE_DEVICE_HANDLER( z80dma_bai_w );
-
 #endif
diff --git a/src/mame/drivers/dkong.c b/src/mame/drivers/dkong.c
index e1982ff6619..a778154a11a 100644
--- a/src/mame/drivers/dkong.c
+++ b/src/mame/drivers/dkong.c
@@ -327,7 +327,6 @@ this is a legitimate Nintendo Kit.
 #include "cpu/m6502/m6502.h"
 #include "includes/dkong.h"
 #include "machine/8257dma.h"
-#include "machine/z80dma.h"
 #include "machine/latch8.h"
 #include "machine/eepromser.h"
 
@@ -754,9 +753,8 @@ READ8_MEMBER(dkong_state::strtheat_inputport_1_r)
 }
 
 WRITE8_MEMBER(dkong_state::dkong_z80dma_rdy_w)
-{
-	device_t *device = machine().device("z80dma");
-	z80dma_rdy_w(device, data & 0x01);
+{	
+	m_z80dma->rdy_w(data & 0x01);
 }
 
 WRITE8_MEMBER(dkong_state::nmi_mask_w)
@@ -842,7 +840,7 @@ ADDRESS_MAP_END
 
 static ADDRESS_MAP_START( dkong3_io_map, AS_IO, 8, dkong_state )
 	ADDRESS_MAP_GLOBAL_MASK(0xff)
-	AM_RANGE(0x00, 0x00) AM_DEVREADWRITE_LEGACY("z80dma", z80dma_r, z80dma_w)  /* dma controller */
+	AM_RANGE(0x00, 0x00) AM_DEVREADWRITE("z80dma", z80dma_device, read, write)  /* dma controller */
 ADDRESS_MAP_END
 
 /* Epos conversions */
diff --git a/src/mame/drivers/mario.c b/src/mame/drivers/mario.c
index e0ef10e1c7f..c3470d5a848 100644
--- a/src/mame/drivers/mario.c
+++ b/src/mame/drivers/mario.c
@@ -126,8 +126,7 @@ static Z80DMA_INTERFACE( mario_dma )
 
 WRITE8_MEMBER(mario_state::mario_z80dma_rdy_w)
 {
-	device_t *device = machine().device("z80dma");
-	z80dma_rdy_w(device, data & 0x01);
+	m_z80dma->rdy_w(data & 0x01);
 }
 
 WRITE8_MEMBER(mario_state::nmi_mask_w)
@@ -181,7 +180,7 @@ ADDRESS_MAP_END
 
 static ADDRESS_MAP_START( mario_io_map, AS_IO, 8, mario_state )
 	ADDRESS_MAP_GLOBAL_MASK(0xff)
-	AM_RANGE(0x00, 0x00) AM_DEVREADWRITE_LEGACY("z80dma", z80dma_r, z80dma_w)   /* dma controller */
+	AM_RANGE(0x00, 0x00) AM_DEVREADWRITE("z80dma", z80dma_device, read, write)  /* dma controller */
 ADDRESS_MAP_END
 
 /*************************************
diff --git a/src/mame/includes/dkong.h b/src/mame/includes/dkong.h
index 30b348a1980..ce1a62f3dd0 100644
--- a/src/mame/includes/dkong.h
+++ b/src/mame/includes/dkong.h
@@ -3,6 +3,8 @@
 #include "machine/tms6100.h"
 #include "cpu/m6502/n2a03.h"
 #include "machine/latch8.h"
+#include "machine/z80dma.h"
+
 
 /*
  * From the schematics:
@@ -106,7 +108,8 @@ public:
 		m_cv4(0),
 		m_gfxdecode(*this, "gfxdecode"),
 		m_screen(*this, "screen"),
-		m_palette(*this, "palette")
+		m_palette(*this, "palette"),
+		m_z80dma(*this, "z80dma")
 	{ }
 
 	/* devices */
@@ -185,6 +188,7 @@ public:
 	required_device<gfxdecode_device> m_gfxdecode;
 	required_device<screen_device> m_screen;
 	required_device<palette_device> m_palette;
+	optional_device<z80dma_device> m_z80dma;
 	
 	/* radarscp_scanline */
 	int m_counter;
diff --git a/src/mame/includes/mario.h b/src/mame/includes/mario.h
index 5c8a54c4240..439be36337a 100644
--- a/src/mame/includes/mario.h
+++ b/src/mame/includes/mario.h
@@ -2,6 +2,7 @@
 #define MARIO_H_
 
 #include "sound/discrete.h"
+#include "machine/z80dma.h"
 
 /*
  * From the schematics:
@@ -43,7 +44,8 @@ public:
 		m_maincpu(*this, "maincpu"),
 		m_audiocpu(*this, "audiocpu"),
 		m_gfxdecode(*this, "gfxdecode"),
-		m_palette(*this, "palette") { }
+		m_palette(*this, "palette"),
+		m_z80dma(*this, "z80dma") { }
 
 	/* memory pointers */
 
@@ -103,6 +105,7 @@ public:
 	required_device<cpu_device> m_audiocpu;
 	required_device<gfxdecode_device> m_gfxdecode;
 	required_device<palette_device> m_palette;
+	required_device<z80dma_device> m_z80dma;
 };
 
 /*----------- defined in audio/mario.c -----------*/
diff --git a/src/mess/drivers/abc1600.c b/src/mess/drivers/abc1600.c
index 590779b7637..bff15fd3772 100644
--- a/src/mess/drivers/abc1600.c
+++ b/src/mess/drivers/abc1600.c
@@ -477,9 +477,9 @@ static ADDRESS_MAP_START( mac_mem, AS_PROGRAM, 8, abc1600_state )
 	AM_RANGE(0x1ff006, 0x1ff006) AM_MIRROR(0xf9) AM_DEVREADWRITE(SAB1797_02P_TAG, fd1797_t, data_r, data_w)
 	AM_RANGE(0x1ff100, 0x1ff101) AM_MIRROR(0xfe) AM_DEVICE(ABC1600_MOVER_TAG, abc1600_mover_device, crtc_map)
 	AM_RANGE(0x1ff200, 0x1ff207) AM_MIRROR(0xf8) AM_READWRITE(dart_r, dart_w)
-	AM_RANGE(0x1ff300, 0x1ff300) AM_MIRROR(0xff) AM_DEVREADWRITE_LEGACY(Z8410AB1_0_TAG, z80dma_r, z80dma_w)
-	AM_RANGE(0x1ff400, 0x1ff400) AM_MIRROR(0xff) AM_DEVREADWRITE_LEGACY(Z8410AB1_1_TAG, z80dma_r, z80dma_w)
-	AM_RANGE(0x1ff500, 0x1ff500) AM_MIRROR(0xff) AM_DEVREADWRITE_LEGACY(Z8410AB1_2_TAG, z80dma_r, z80dma_w)
+	AM_RANGE(0x1ff300, 0x1ff300) AM_MIRROR(0xff) AM_DEVREADWRITE(Z8410AB1_0_TAG, z80dma_device, read, write)
+	AM_RANGE(0x1ff400, 0x1ff400) AM_MIRROR(0xff) AM_DEVREADWRITE(Z8410AB1_1_TAG, z80dma_device, read, write)
+	AM_RANGE(0x1ff500, 0x1ff500) AM_MIRROR(0xff) AM_DEVREADWRITE(Z8410AB1_2_TAG, z80dma_device, read, write)
 	AM_RANGE(0x1ff600, 0x1ff607) AM_MIRROR(0xf8) AM_READWRITE(scc_r, scc_w)
 	AM_RANGE(0x1ff700, 0x1ff707) AM_MIRROR(0xf8) AM_READWRITE(cio_r, cio_w)
 	AM_RANGE(0x1ff800, 0x1ffaff) AM_DEVICE(ABC1600_MOVER_TAG, abc1600_mover_device, io_map)
@@ -538,7 +538,7 @@ static Z80DMA_INTERFACE( dma0_intf )
 {
 	DEVCB_DRIVER_LINE_MEMBER(abc1600_state, dbrq_w),
 	DEVCB_NULL,
-	DEVCB_DEVICE_LINE(Z8410AB1_1_TAG, z80dma_bai_w),
+	DEVCB_DEVICE_LINE_MEMBER(Z8410AB1_1_TAG, z80dma_device, bai_w),
 	DEVCB_DEVICE_MEMBER(ABC1600_MAC_TAG, abc1600_mac_device, dma0_mreq_r),
 	DEVCB_DEVICE_MEMBER(ABC1600_MAC_TAG, abc1600_mac_device, dma0_mreq_w),
 	DEVCB_DEVICE_MEMBER(ABC1600_MAC_TAG, abc1600_mac_device, dma0_iorq_r),
@@ -568,7 +568,7 @@ static Z80DMA_INTERFACE( dma1_intf )
 {
 	DEVCB_DRIVER_LINE_MEMBER(abc1600_state, dbrq_w),
 	DEVCB_NULL,
-	DEVCB_DEVICE_LINE(Z8410AB1_2_TAG, z80dma_bai_w),
+	DEVCB_DEVICE_LINE_MEMBER(Z8410AB1_2_TAG, z80dma_device, bai_w),
 	DEVCB_DEVICE_MEMBER(ABC1600_MAC_TAG, abc1600_mac_device, dma1_mreq_r),
 	DEVCB_DEVICE_MEMBER(ABC1600_MAC_TAG, abc1600_mac_device, dma1_mreq_w),
 	DEVCB_DEVICE_MEMBER(ABC1600_MAC_TAG, abc1600_mac_device, dma1_iorq_r),
diff --git a/src/mess/drivers/altos5.c b/src/mess/drivers/altos5.c
index ce4c81d2111..ab31f90f54b 100644
--- a/src/mess/drivers/altos5.c
+++ b/src/mess/drivers/altos5.c
@@ -100,7 +100,7 @@ ADDRESS_MAP_END
 
 static ADDRESS_MAP_START(altos5_io, AS_IO, 8, altos5_state)
 	ADDRESS_MAP_GLOBAL_MASK(0xff)
-	AM_RANGE(0x00, 0x03) AM_DEVREADWRITE_LEGACY("z80dma", z80dma_r, z80dma_w)
+	AM_RANGE(0x00, 0x03) AM_DEVREADWRITE("z80dma", z80dma_device, read, write)
 	AM_RANGE(0x04, 0x07) AM_DEVREADWRITE("fdc", fd1797_t, read, write)
 	AM_RANGE(0x08, 0x0b) AM_DEVREADWRITE("z80pio_0", z80pio_device, read, write)
 	AM_RANGE(0x0c, 0x0f) AM_DEVREADWRITE("z80ctc", z80ctc_device, read, write)
diff --git a/src/mess/drivers/bigbord2.c b/src/mess/drivers/bigbord2.c
index 5d1ab8ca9f8..8b9b5702125 100644
--- a/src/mess/drivers/bigbord2.c
+++ b/src/mess/drivers/bigbord2.c
@@ -366,7 +366,7 @@ WRITE8_MEMBER( bigbord2_state::portcc_w )
 	if ((data & 7) == 2)
 		dma_rdy = m_fdc_drq;
 
-	z80dma_rdy_w(m_dma, dma_rdy);
+	m_dma->rdy_w(dma_rdy);
 }
 
 
@@ -387,7 +387,7 @@ static ADDRESS_MAP_START( bigbord2_io, AS_IO, 8, bigbord2_state )
 	AM_RANGE(0x80, 0x83) AM_DEVREADWRITE(Z80SIO_TAG, z80sio0_device, ba_cd_r, ba_cd_w)
 	//AM_RANGE(0x84, 0x87) AM_DEVREADWRITE(Z80CTCA_TAG, z80ctc_device, read, write) //has issues
 	AM_RANGE(0x88, 0x8b) AM_DEVREADWRITE(Z80CTCB_TAG, z80ctc_device, read, write)
-	AM_RANGE(0x8C, 0x8F) AM_DEVREADWRITE_LEGACY(Z80DMA_TAG, z80dma_r, z80dma_w)
+	AM_RANGE(0x8C, 0x8F) AM_DEVREADWRITE(Z80DMA_TAG, z80dma_device, read, write)
 	//AM_RANGE(0xC0, 0xC3)   eprom programming port
 	AM_RANGE(0xC4, 0xC7) AM_READ(portc4_r)
 	AM_RANGE(0xC8, 0xCB) AM_WRITE(portc8_w)
diff --git a/src/mess/drivers/bullet.c b/src/mess/drivers/bullet.c
index da14dd01943..6f0cb4c6150 100644
--- a/src/mess/drivers/bullet.c
+++ b/src/mess/drivers/bullet.c
@@ -620,7 +620,7 @@ static ADDRESS_MAP_START( bullet_io, AS_IO, 8, bullet_state )
 	AM_RANGE(0x08, 0x0b) AM_DEVREADWRITE(Z80CTC_TAG, z80ctc_device, read, write)
 	AM_RANGE(0x0c, 0x0c) AM_MIRROR(0x03) AM_READWRITE(win_r, wstrobe_w)
 	AM_RANGE(0x10, 0x13) AM_DEVREADWRITE(MB8877_TAG, mb8877_t, read, write)
-	AM_RANGE(0x14, 0x14) AM_DEVREADWRITE_LEGACY(Z80DMA_TAG, z80dma_r, z80dma_w)
+	AM_RANGE(0x14, 0x14) AM_DEVREADWRITE(Z80DMA_TAG, z80dma_device, read, write)
 	AM_RANGE(0x15, 0x15) AM_READWRITE(brom_r, brom_w)
 	AM_RANGE(0x16, 0x16) AM_WRITE(exdsk_w)
 	AM_RANGE(0x17, 0x17) AM_WRITE(exdma_w)
@@ -653,7 +653,7 @@ static ADDRESS_MAP_START( bulletf_io, AS_IO, 8, bulletf_state )
 	AM_RANGE(0x16, 0x16) AM_WRITE(xfdc_w)
 	AM_RANGE(0x17, 0x17) AM_WRITE(mbank_w)
 	AM_RANGE(0x19, 0x19) AM_READWRITE(scsi_r, scsi_w)
-	AM_RANGE(0x1a, 0x1a) AM_DEVREADWRITE_LEGACY(Z80DMA_TAG, z80dma_r, z80dma_w)
+	AM_RANGE(0x1a, 0x1a) AM_DEVREADWRITE(Z80DMA_TAG, z80dma_device, read, write)
 	AM_RANGE(0x1b, 0x1b) AM_READ(hwsts_r)
 ADDRESS_MAP_END
 
@@ -815,7 +815,7 @@ void bullet_state::update_dma_rdy()
 		break;
 	}
 
-	z80dma_rdy_w(m_dmac, rdy);
+	m_dmac->rdy_w(rdy);
 }
 
 READ8_MEMBER( bullet_state::dma_mreq_r )
@@ -879,7 +879,7 @@ void bulletf_state::update_dma_rdy()
 		rdy = m_fdrdy;
 	}
 
-	z80dma_rdy_w(m_dmac, rdy);
+	m_dmac->rdy_w(rdy);
 }
 
 READ8_MEMBER( bulletf_state::dma_mreq_r )
diff --git a/src/mess/drivers/p8k.c b/src/mess/drivers/p8k.c
index a61a8bea357..32d12cb63f2 100644
--- a/src/mess/drivers/p8k.c
+++ b/src/mess/drivers/p8k.c
@@ -153,7 +153,7 @@ static ADDRESS_MAP_START(p8k_iomap, AS_IO, 8, p8k_state)
 	AM_RANGE(0x24, 0x27) AM_READWRITE(p8k_port24_r,p8k_port24_w)
 	AM_RANGE(0x28, 0x2b) AM_DEVREADWRITE("z80sio_1", z80sio_device, read_alt, write_alt)
 	AM_RANGE(0x2c, 0x2f) AM_DEVREADWRITE("z80ctc_1", z80ctc_device, read, write)
-	AM_RANGE(0x3c, 0x3c) AM_DEVREADWRITE_LEGACY("z80dma", z80dma_r, z80dma_w)
+	AM_RANGE(0x3c, 0x3c) AM_DEVREADWRITE("z80dma", z80dma_device, read, write)
 ADDRESS_MAP_END
 
 
diff --git a/src/mess/drivers/super6.c b/src/mess/drivers/super6.c
index 009d662263c..d531d56a942 100644
--- a/src/mess/drivers/super6.c
+++ b/src/mess/drivers/super6.c
@@ -286,7 +286,7 @@ static ADDRESS_MAP_START( super6_io, AS_IO, 8, super6_state )
 	AM_RANGE(0x04, 0x07) AM_DEVREADWRITE(Z80PIO_TAG, z80pio_device, read, write)
 	AM_RANGE(0x08, 0x0b) AM_DEVREADWRITE(Z80CTC_TAG, z80ctc_device, read, write)
 	AM_RANGE(0x0c, 0x0f) AM_DEVREADWRITE(WD2793_TAG, wd2793_t, read, write)
-	AM_RANGE(0x10, 0x10) AM_MIRROR(0x03) AM_DEVREADWRITE_LEGACY(Z80DMA_TAG, z80dma_r, z80dma_w)
+	AM_RANGE(0x10, 0x10) AM_MIRROR(0x03) AM_DEVREADWRITE(Z80DMA_TAG, z80dma_device, read, write)
 	AM_RANGE(0x14, 0x14) AM_READWRITE(fdc_r, fdc_w)
 	AM_RANGE(0x15, 0x15) AM_READ_PORT("J7") AM_WRITE(s100_w)
 	AM_RANGE(0x16, 0x16) AM_WRITE(bank0_w)
diff --git a/src/mess/drivers/trs80m2.c b/src/mess/drivers/trs80m2.c
index d7df66a15df..c6491a4e93c 100644
--- a/src/mess/drivers/trs80m2.c
+++ b/src/mess/drivers/trs80m2.c
@@ -330,7 +330,7 @@ static ADDRESS_MAP_START( z80_io, AS_IO, 8, trs80m2_state )
 	AM_RANGE(0xef, 0xef) AM_WRITE(drvslt_w)
 	AM_RANGE(0xf0, 0xf3) AM_DEVREADWRITE(Z80CTC_TAG, z80ctc_device, read, write)
 	AM_RANGE(0xf4, 0xf7) AM_DEVREADWRITE(Z80SIO_TAG, z80sio0_device, cd_ba_r, cd_ba_w)
-	AM_RANGE(0xf8, 0xf8) AM_DEVREADWRITE_LEGACY(Z80DMA_TAG, z80dma_r, z80dma_w)
+	AM_RANGE(0xf8, 0xf8) AM_DEVREADWRITE(Z80DMA_TAG, z80dma_device, read, write)
 	AM_RANGE(0xf9, 0xf9) AM_WRITE(rom_enable_w)
 	AM_RANGE(0xfc, 0xfc) AM_READ(keyboard_r) AM_DEVWRITE(MC6845_TAG, mc6845_device, address_w)
 	AM_RANGE(0xfd, 0xfd) AM_DEVREADWRITE(MC6845_TAG, mc6845_device, register_r, register_w)
diff --git a/src/mess/drivers/x1.c b/src/mess/drivers/x1.c
index 80258624bf9..2c57abf38fa 100644
--- a/src/mess/drivers/x1.c
+++ b/src/mess/drivers/x1.c
@@ -1059,7 +1059,7 @@ static const wd17xx_interface x1_mb8877a_interface =
 
 WRITE_LINE_MEMBER(x1_state::fdc_drq_w)
 {
-	z80dma_rdy_w(machine().device("dma"), state ^ 1);
+	m_dma->rdy_w(state ^ 1);
 }
 
 static const wd17xx_interface x1turbo_mb8877a_interface =
@@ -1681,7 +1681,7 @@ READ8_MEMBER( x1_state::x1turbo_io_r )
 	else if(offset >= 0x1900 && offset <= 0x19ff)   { return x1_sub_io_r(space, 0); }
 	else if(offset >= 0x1a00 && offset <= 0x1aff)   { return machine().device<i8255_device>("ppi8255_0")->read(space, (offset-0x1a00) & 3); }
 	else if(offset >= 0x1b00 && offset <= 0x1bff)   { return machine().device<ay8910_device>("ay")->data_r(space, 0); }
-	else if(offset >= 0x1f80 && offset <= 0x1f8f)   { return z80dma_r(machine().device("dma"), space, 0); }
+	else if(offset >= 0x1f80 && offset <= 0x1f8f)   { return m_dma->read(space, 0); }
 	else if(offset >= 0x1f90 && offset <= 0x1f93)   { return machine().device<z80sio0_device>("sio")->ba_cd_r(space, (offset-0x1f90) & 3); }
 	else if(offset >= 0x1f98 && offset <= 0x1f9f)   { printf("Extended SIO/CTC read %04x\n",offset); return 0xff; }
 	else if(offset >= 0x1fa0 && offset <= 0x1fa3)   { return m_ctc->read(space,offset-0x1fa0); }
@@ -1734,7 +1734,7 @@ WRITE8_MEMBER( x1_state::x1turbo_io_w )
 	else if(offset >= 0x1c00 && offset <= 0x1cff)   { machine().device<ay8910_device>("ay")->address_w(space, 0,data); }
 	else if(offset >= 0x1d00 && offset <= 0x1dff)   { x1_rom_bank_1_w(space,0,data); }
 	else if(offset >= 0x1e00 && offset <= 0x1eff)   { x1_rom_bank_0_w(space,0,data); }
-	else if(offset >= 0x1f80 && offset <= 0x1f8f)   { z80dma_w(machine().device("dma"), space, 0,data); }
+	else if(offset >= 0x1f80 && offset <= 0x1f8f)   { m_dma->write(space, 0,data); }
 	else if(offset >= 0x1f90 && offset <= 0x1f93)   { machine().device<z80sio0_device>("sio")->ba_cd_w(space, (offset-0x1f90) & 3,data); }
 	else if(offset >= 0x1f98 && offset <= 0x1f9f)   { printf("Extended SIO/CTC write %04x %02x\n",offset,data); }
 	else if(offset >= 0x1fa0 && offset <= 0x1fa3)   { m_ctc->write(space,offset-0x1fa0,data); }
diff --git a/src/mess/drivers/zorba.c b/src/mess/drivers/zorba.c
index bb87bbbff9e..e0f6935ab21 100644
--- a/src/mess/drivers/zorba.c
+++ b/src/mess/drivers/zorba.c
@@ -126,7 +126,7 @@ static ADDRESS_MAP_START( zorba_io, AS_IO, 8, zorba_state )
 	//AM_RANGE(0x25, 0x25) AM_DEVREADWRITE("uart2", i8251_device, status_r, control_w)
 	AM_RANGE(0x24, 0x25) AM_READ(keyboard_r) AM_WRITENOP
 	AM_RANGE(0x26, 0x26) AM_WRITE(intmask_w)
-	AM_RANGE(0x30, 0x30) AM_DEVREADWRITE_LEGACY("dma", z80dma_r, z80dma_w)
+	AM_RANGE(0x30, 0x30) AM_DEVREADWRITE("dma", z80dma_device, read, write)
 	AM_RANGE(0x40, 0x43) AM_DEVREADWRITE("fdc", fd1793_t, read, write)
 	AM_RANGE(0x50, 0x53) AM_DEVREADWRITE("pia0", pia6821_device, read, write)
 	AM_RANGE(0x60, 0x63) AM_DEVREADWRITE("pia1", pia6821_device, read, write)
diff --git a/src/mess/includes/x1.h b/src/mess/includes/x1.h
index cae1c02849d..c8523038ee4 100644
--- a/src/mess/includes/x1.h
+++ b/src/mess/includes/x1.h
@@ -81,7 +81,8 @@ public:
 	m_crtc(*this, "crtc"),
 	m_ctc(*this, "ctc"),
 	m_gfxdecode(*this, "gfxdecode"),
-		m_palette(*this, "palette") 
+		m_palette(*this, "palette"),
+		m_dma(*this, "dma")
 	{ }
 
 	required_device<cpu_device> m_maincpu;
@@ -232,6 +233,7 @@ public:
 	DECLARE_WRITE8_MEMBER(io_write_byte);
 	required_device<gfxdecode_device> m_gfxdecode;
 	required_device<palette_device> m_palette;
+	optional_device<z80dma_device> m_dma;
 };
 
 /*----------- defined in machine/x1.c -----------*/