diff --git a/src/devices/sound/l7a1045_l6028_dsp_a.cpp b/src/devices/sound/l7a1045_l6028_dsp_a.cpp
index 24e61362079..825e09054ed 100644
--- a/src/devices/sound/l7a1045_l6028_dsp_a.cpp
+++ b/src/devices/sound/l7a1045_l6028_dsp_a.cpp
@@ -207,6 +207,8 @@ WRITE16_MEMBER( l7a1045_sound_device::l7a1045_sound_w )
 {
 	m_stream->update(); // TODO
 
+	//logerror("%s: %x to %x (mask %04x)\n", tag(), data, offset, mem_mask);
+
 	if(offset == 0)
 		sound_select_w(space, offset, data, mem_mask);
 	else if(offset == 8/2)
@@ -220,6 +222,8 @@ READ16_MEMBER( l7a1045_sound_device::l7a1045_sound_r )
 {
 	m_stream->update();
 
+	//logerror("%s: read at %x (mask %04x)\n", tag(), offset, mem_mask);
+
 	if(offset == 0)
 		printf("sound_select_r?\n");
 	else
@@ -261,6 +265,8 @@ WRITE16_MEMBER(l7a1045_sound_device::sound_data_w)
 
 	m_audiodat[m_audioregister][m_audiochannel].dat[offset] = data;
 
+	//logerror("%s: %x to ch %d reg %d\n", tag(), data, m_audiochannel, m_audioregister);
+
 	switch (m_audioregister)
 	{
 		case 0x00:
@@ -269,8 +275,15 @@ WRITE16_MEMBER(l7a1045_sound_device::sound_data_w)
 			vptr->start |= (m_audiodat[m_audioregister][m_audiochannel].dat[1] & 0xffff) << (4);
 			vptr->start |= (m_audiodat[m_audioregister][m_audiochannel].dat[0] & 0xf000) >> (12);
 
+			//logerror("%s: channel %d start = %08x\n", tag(), m_audiochannel, vptr->start);
+
 			vptr->start &= m_rom.mask();
 
+			// if voice isn't active, clear the pos on start writes (required for DMA tests on MPC3000)
+			if (!(m_key & (1 << m_audiochannel)))
+			{
+				vptr->pos = 0;
+			}
 			break;
 		case 0x01:
 			// relative to start
@@ -296,7 +309,7 @@ WRITE16_MEMBER(l7a1045_sound_device::sound_data_w)
 
 				vptr->end &= m_rom.mask();
 			}
-
+			//logerror("%s: channel %d end = %08x\n", tag(), m_audiochannel, vptr->start);
 			break;
 
 		case 0x07:
@@ -363,3 +376,22 @@ WRITE16_MEMBER(l7a1045_sound_device::sound_status_w)
 		m_key |= 1 << m_audiochannel;
 	}
 }
+
+WRITE_LINE_MEMBER(l7a1045_sound_device::dma_hreq_cb)
+{
+//  m_maincpu->hack_w(1);
+}
+
+READ8_MEMBER(l7a1045_sound_device::dma_r_cb)
+{
+//    logerror("dma_ior3_cb: offset %x\n", offset);
+
+	m_voice[0].pos++;
+	return 0;
+}
+
+WRITE8_MEMBER(l7a1045_sound_device::dma_w_cb)
+{
+	m_voice[0].pos++;
+//    logerror("dma_iow3_cb: offset %x\n", offset);
+}
diff --git a/src/devices/sound/l7a1045_l6028_dsp_a.h b/src/devices/sound/l7a1045_l6028_dsp_a.h
index 5b49990f7c7..fecca395b89 100644
--- a/src/devices/sound/l7a1045_l6028_dsp_a.h
+++ b/src/devices/sound/l7a1045_l6028_dsp_a.h
@@ -22,6 +22,10 @@ public:
 	DECLARE_WRITE16_MEMBER( l7a1045_sound_w );
 	DECLARE_READ16_MEMBER( l7a1045_sound_r );
 
+	DECLARE_READ8_MEMBER(dma_r_cb);
+	DECLARE_WRITE8_MEMBER(dma_w_cb);
+	DECLARE_WRITE_LINE_MEMBER(dma_hreq_cb);
+
 protected:
 	// device-level overrides
 	virtual void device_start() override;
diff --git a/src/mame/drivers/mpc3000.cpp b/src/mame/drivers/mpc3000.cpp
index 3151837c8e7..529c7991d66 100644
--- a/src/mame/drivers/mpc3000.cpp
+++ b/src/mame/drivers/mpc3000.cpp
@@ -84,6 +84,14 @@ private:
 
 	void mpc3000_map(address_map &map);
 	void mpc3000_io_map(address_map &map);
+
+	DECLARE_READ16_MEMBER(dsp_0008_hack_r);
+	DECLARE_WRITE16_MEMBER(dsp_0008_hack_w);
+	DECLARE_READ8_MEMBER(dma_memr_cb);
+	DECLARE_WRITE8_MEMBER(lcd_w)
+	{
+		printf("%c", data);
+	}
 };
 
 void mpc3000_state::machine_start()
@@ -101,15 +109,48 @@ void mpc3000_state::mpc3000_map(address_map &map)
 	map(0x500000, 0x500fff).ram(); // actually 8-bit battery-backed RAM
 }
 
+WRITE16_MEMBER(mpc3000_state::dsp_0008_hack_w)
+{
+	// this is related to the DSP's DMA capability.  The DSP
+	// connects to the V53's DMA3 channel on both the MPCs and HNG64.
+	m_maincpu->dreq3_w(data&0x1);
+	m_dsp->l7a1045_sound_w(space,8/2,data,mem_mask);
+}
+
+
+READ16_MEMBER(mpc3000_state::dsp_0008_hack_r)
+{
+	// read in irq5
+	return 0;
+}
+
 void mpc3000_state::mpc3000_io_map(address_map &map)
 {
+	map(0x0060, 0x0067).rw(m_dsp, FUNC(l7a1045_sound_device::l7a1045_sound_r), FUNC(l7a1045_sound_device::l7a1045_sound_w));
+	map(0x0068, 0x0069).rw(FUNC(mpc3000_state::dsp_0008_hack_r), FUNC(mpc3000_state::dsp_0008_hack_w));
+	map(0x00e0, 0x00e0).w(FUNC(mpc3000_state::lcd_w));
+}
+
+READ8_MEMBER(mpc3000_state::dma_memr_cb)
+{
+	//logerror("dma_memr_cb: offset %x\n", offset);
+	return m_maincpu->space(AS_PROGRAM).read_byte(offset);
 }
 
 void mpc3000_state::mpc3000(machine_config &config)
 {
-	V53A(config, m_maincpu, 16_MHz_XTAL);
-	m_maincpu->set_addrmap(AS_PROGRAM, &mpc3000_state::mpc3000_map);
-	m_maincpu->set_addrmap(AS_IO, &mpc3000_state::mpc3000_io_map);
+	// V53A isn't devcb3 compliant yet.
+	//V53A(config, m_maincpu, 16_MHz_XTAL);
+	//m_maincpu->set_addrmap(AS_PROGRAM, &mpc3000_state::mpc3000_map);
+	//m_maincpu->set_addrmap(AS_IO, &mpc3000_state::mpc3000_io_map);
+	device_t *device = nullptr;
+	MCFG_DEVICE_ADD("maincpu", V53A, 16_MHz_XTAL)
+	MCFG_DEVICE_PROGRAM_MAP(mpc3000_map)
+	MCFG_DEVICE_IO_MAP(mpc3000_io_map)
+	MCFG_V53_DMAU_OUT_HREQ_CB(WRITELINE("maincpu", v53_base_device, hack_w))
+	MCFG_V53_DMAU_IN_MEMR_CB(READ8(*this, mpc3000_state, dma_memr_cb))
+	MCFG_V53_DMAU_IN_IOR_3_CB(WRITE8("dsp", l7a1045_sound_device, dma_r_cb))
+	MCFG_V53_DMAU_OUT_IOW_3_CB(WRITE8("dsp", l7a1045_sound_device, dma_w_cb))
 
 	auto &mdin(MIDI_PORT(config, "mdin"));
 	midiin_slot(mdin);