diff --git a/src/emu/machine/z80dma.c b/src/emu/machine/z80dma.c
index 67df6e93d6b..db663453d93 100644
--- a/src/emu/machine/z80dma.c
+++ b/src/emu/machine/z80dma.c
@@ -12,8 +12,9 @@
         - Only memory to memory is tested!
 
     TODO:
-        - implement missing features
+		- refactor according to new memory system
         - implement interrupt support (not used in dkong3 and mario)
+        - implement missing features
         - implement more asserts
         - implement a INPUT_LINE_BUSREQ for Z80. As a workaround,
           HALT is used. This implies burst mode.
@@ -23,6 +24,7 @@
 #include "driver.h"
 #include "memconv.h"
 #include "z80dma.h"
+#include "cpu/z80/z80daisy.h"
 
 #define VERBOSE 0
 
@@ -412,9 +414,30 @@ WRITE8_DEVICE_HANDLER( z80dma_rdy_w)
 	timer_call_after_resynch((void *) device, param, z80dma_rdy_write_callback);
 }
 
-/* ----------------------------------------------------------------------- */
 
-/* device interface */
+/***************************************************************************
+    DAISY CHAIN INTERFACE
+***************************************************************************/
+
+static int z80dma_irq_state(const device_config *device)
+{
+	int state = 0;
+
+	return state;
+}
+
+static int z80dma_irq_ack(const device_config *device)
+{
+	return 0;
+}
+
+static void z80dma_irq_reti(const device_config *device)
+{
+}
+
+/***************************************************************************
+    DEVICE INTERFACE
+***************************************************************************/
 
 static DEVICE_START( z80dma )
 {
@@ -483,6 +506,9 @@ DEVICE_GET_INFO( z80dma )
 		case DEVINFO_FCT_START:							info->start = DEVICE_START_NAME(z80dma);break;
 		case DEVINFO_FCT_STOP:							/* Nothing */							break;
 		case DEVINFO_FCT_RESET:							info->reset = DEVICE_RESET_NAME(z80dma);break;
+		case DEVINFO_FCT_IRQ_STATE:						info->f = (genf *)z80dma_irq_state;		break;
+		case DEVINFO_FCT_IRQ_ACK:						info->f = (genf *)z80dma_irq_ack;		break;
+		case DEVINFO_FCT_IRQ_RETI:						info->f = (genf *)z80dma_irq_reti;		break;
 
 		/* --- the following bits of info are returned as NULL-terminated strings --- */
 		case DEVINFO_STR_NAME:							info->s = "Z80DMA";						break;
diff --git a/src/emu/machine/z80dma.h b/src/emu/machine/z80dma.h
index b8b5cad89ec..17ede2503a5 100644
--- a/src/emu/machine/z80dma.h
+++ b/src/emu/machine/z80dma.h
@@ -1,6 +1,6 @@
 /**********************************************************************
 
- 8257 DMA interface and emulation
+    Z80 DMA interface and emulation
 
  **********************************************************************/
 
@@ -29,7 +29,7 @@ struct _z80dma_interface
 	write8_device_func	portB_write;
 
 	/* interrupt callback - not implemented */
-	/* void (*irqcb)(int state); */
+	void (*irq_cb)(const device_config *device, int state);
 };
 
 /* device interface */
diff --git a/src/mame/drivers/dkong.c b/src/mame/drivers/dkong.c
index 52bb295e995..ece0859c6de 100644
--- a/src/mame/drivers/dkong.c
+++ b/src/mame/drivers/dkong.c
@@ -343,7 +343,8 @@ static const z80dma_interface dk3_dma =
 
 	dk_dma_read_byte,
 	dk_dma_write_byte,
-	0, 0, 0, 0
+	0, 0, 0, 0,
+	NULL
 };
 
 static const dma8257_interface dk_dma =
diff --git a/src/mame/drivers/mario.c b/src/mame/drivers/mario.c
index d2a3db68101..9d7494f2b30 100644
--- a/src/mame/drivers/mario.c
+++ b/src/mame/drivers/mario.c
@@ -110,7 +110,8 @@ static const z80dma_interface mario_dma =
 
 	mario_dma_read_byte,
 	mario_dma_write_byte,
-	0, 0, 0, 0
+	0, 0, 0, 0,
+	NULL
 };
 
 /*************************************