diff --git a/src/mame/drivers/legionna.c b/src/mame/drivers/legionna.c
index d9ce85c97be..c9653bec5ee 100644
--- a/src/mame/drivers/legionna.c
+++ b/src/mame/drivers/legionna.c
@@ -93,6 +93,10 @@ static ADDRESS_MAP_START( legionna_cop_mem, AS_PROGRAM, 16, legionna_state )
 	AM_RANGE(0x100400, 0x100401) AM_DEVWRITE("raiden2cop", raiden2cop_device, cop_sprite_dma_param_lo_w) // grainbow
 	AM_RANGE(0x100402, 0x100403) AM_DEVWRITE("raiden2cop", raiden2cop_device, cop_sprite_dma_param_hi_w) // grainbow
 	AM_RANGE(0x10040c, 0x10040d) AM_DEVWRITE("raiden2cop", raiden2cop_device, cop_sprite_dma_size_w) // grainbow
+	AM_RANGE(0x100410, 0x100411) AM_DEVWRITE("raiden2cop", raiden2cop_device, cop_sprite_dma_inc_w) // grainbow
+	AM_RANGE(0x100412, 0x100413) AM_DEVWRITE("raiden2cop", raiden2cop_device, cop_sprite_dma_src_hi_w) // grainbow
+	AM_RANGE(0x100414, 0x100415) AM_DEVWRITE("raiden2cop", raiden2cop_device, cop_sprite_dma_src_lo_w) // grainbow
+
 
 //	AM_RANGE(0x10041c, 0x10041d) AM_WRITE(cop_angle_target_w) // angle target (for 0x6200 COP macro)
 //	AM_RANGE(0x10041e, 0x10041f) AM_WRITE(cop_angle_step_w)   // angle step   (for 0x6200 COP macro)
diff --git a/src/mame/machine/raiden2cop.c b/src/mame/machine/raiden2cop.c
index c275de79cf6..c8509697085 100644
--- a/src/mame/machine/raiden2cop.c
+++ b/src/mame/machine/raiden2cop.c
@@ -44,6 +44,7 @@ raiden2cop_device::raiden2cop_device(const machine_config &mconfig, const char *
 	m_cop_rng_max_value(0),
 
 	m_cop_sprite_dma_param(0),
+	m_cop_sprite_dma_src(0),
 	m_cop_sprite_dma_size(0),
 
 
@@ -136,6 +137,7 @@ void raiden2cop_device::device_start()
 	save_item(NAME(m_cop_sprite_dma_param));
 
 	save_item(NAME(m_cop_sprite_dma_size));
+	save_item(NAME(m_cop_sprite_dma_src));
 
 
 	m_videoramout_cb.resolve_safe();
@@ -1106,3 +1108,34 @@ WRITE16_MEMBER(raiden2cop_device::cop_sprite_dma_size_w)
 {
 	m_cop_sprite_dma_size = data;
 }
+
+
+WRITE16_MEMBER( raiden2cop_device::cop_sprite_dma_src_hi_w)
+{
+	m_cop_sprite_dma_src = (m_cop_sprite_dma_src&0x0000ffff)|(data<<16);
+}
+
+WRITE16_MEMBER( raiden2cop_device::cop_sprite_dma_src_lo_w)
+{
+	m_cop_sprite_dma_src = (m_cop_sprite_dma_src&0xffff0000)|(data&0xffff);
+}
+
+// guess
+WRITE16_MEMBER(raiden2cop_device::cop_sprite_dma_inc_w)
+{
+	if (data)
+		printf("Warning: COP RAM 0x410 used with %04x\n", data);
+	else
+	{
+		/* guess */
+		cop_regs[4] += 8;
+		m_cop_sprite_dma_src += 6;
+
+		m_cop_sprite_dma_size--;
+
+		if (m_cop_sprite_dma_size > 0)
+			cop_status &= ~2;
+		else
+			cop_status |= 2;
+	}
+}
diff --git a/src/mame/machine/raiden2cop.h b/src/mame/machine/raiden2cop.h
index b08ed207c9b..e583d60d3e3 100644
--- a/src/mame/machine/raiden2cop.h
+++ b/src/mame/machine/raiden2cop.h
@@ -156,9 +156,14 @@ public:
 
 	// misc 68k (grainbow)
 	UINT32 m_cop_sprite_dma_param;
+	UINT32 m_cop_sprite_dma_src;
+
 	DECLARE_WRITE16_MEMBER(cop_sprite_dma_param_hi_w);
 	DECLARE_WRITE16_MEMBER(cop_sprite_dma_param_lo_w);
 	DECLARE_WRITE16_MEMBER(cop_sprite_dma_size_w);
+	DECLARE_WRITE16_MEMBER(cop_sprite_dma_src_hi_w);
+	DECLARE_WRITE16_MEMBER(cop_sprite_dma_src_lo_w);
+	DECLARE_WRITE16_MEMBER(cop_sprite_dma_inc_w);
 	int m_cop_sprite_dma_size;
 
 protected:
diff --git a/src/mame/machine/seicop.c b/src/mame/machine/seicop.c
index c530e637104..f4e442bf1e3 100644
--- a/src/mame/machine/seicop.c
+++ b/src/mame/machine/seicop.c
@@ -1611,7 +1611,6 @@ seibu_cop_legacy_device::seibu_cop_legacy_device(const machine_config &mconfig,
 	m_cop_rom_addr_lo(0),
 	m_cop_rom_addr_hi(0),
 	m_cop_rom_addr_unk(0),
-	m_cop_sprite_dma_src(0),
 	m_cop_sprite_dma_abs_x(0),
 	m_cop_sprite_dma_abs_y(0),
 	m_raiden2cop(*this, ":raiden2cop")
@@ -1651,7 +1650,6 @@ void seibu_cop_legacy_device::device_start()
 	save_item(NAME(m_cop_rom_addr_lo));
 	save_item(NAME(m_cop_rom_addr_hi));
 	save_item(NAME(m_cop_rom_addr_unk));
-	save_item(NAME(m_cop_sprite_dma_src));
 	save_item(NAME(m_cop_sprite_dma_abs_x));
 	save_item(NAME(m_cop_sprite_dma_abs_y));
 }
@@ -2070,30 +2068,7 @@ WRITE16_MEMBER( seibu_cop_legacy_device::generic_cop_w )
 
 	
 
-		case (0x010/2):
-		{
-			if(data)
-				printf("Warning: COP RAM 0x410 used with %04x\n",data);
-			else
-			{
-				/* guess */
-				m_raiden2cop->cop_regs[4]+=8;
-				m_cop_sprite_dma_src+=6;
 
-				m_raiden2cop->m_cop_sprite_dma_size--;
-
-				if(m_raiden2cop->m_cop_sprite_dma_size > 0)
-					m_raiden2cop->cop_status &= ~2;
-				else
-					m_raiden2cop->cop_status |= 2;
-			}
-			break;
-		}
-
-		case (0x012/2):
-		case (0x014/2):
-			m_cop_sprite_dma_src = (m_cop_mcu_ram[0x014/2]) | (m_cop_mcu_ram[0x012/2] << 16);
-			break;
 
 		/* triggered before 0x6200 in Seibu Cup, looks like an angle value ... */
 		case (0x01c/2): m_legacycop_angle_compare = UINT16(m_cop_mcu_ram[0x1c/2]);  break;
@@ -2470,7 +2445,7 @@ WRITE16_MEMBER( seibu_cop_legacy_device::generic_cop_w )
 				/* TODO: I really suspect that following two are actually taken from the 0xa180 macro command then internally loaded */
 				abs_x = space.read_word(m_raiden2cop->cop_regs[0] + 8) - m_cop_sprite_dma_abs_x;
 				abs_y = space.read_word(m_raiden2cop->cop_regs[0] + 4) - m_cop_sprite_dma_abs_y;
-				rel_xy = space.read_word(m_cop_sprite_dma_src + 4 + offs);
+				rel_xy = space.read_word(m_raiden2cop->m_cop_sprite_dma_src + 4 + offs);
 
 				//if(rel_xy & 0x0706)
 				//  printf("sprite rel_xy = %04x\n",rel_xy);
@@ -2492,8 +2467,8 @@ WRITE16_MEMBER( seibu_cop_legacy_device::generic_cop_w )
 
 				offs = (offset & 3) * 4;
 
-				space.write_word(m_raiden2cop->cop_regs[4] + offs + 0,space.read_word(m_cop_sprite_dma_src + offs) + (m_raiden2cop->m_cop_sprite_dma_param & 0x3f));
-				//space.write_word(m_raiden2cop->cop_regs[4] + offs + 2,space.read_word(m_cop_sprite_dma_src+2 + offs));
+				space.write_word(m_raiden2cop->cop_regs[4] + offs + 0,space.read_word(m_raiden2cop->m_cop_sprite_dma_src + offs) + (m_raiden2cop->m_cop_sprite_dma_param & 0x3f));
+				//space.write_word(m_raiden2cop->cop_regs[4] + offs + 2,space.read_word(m_raiden2cop->m_cop_sprite_dma_src+2 + offs));
 				return;
 			}
 
diff --git a/src/mame/machine/seicop.h b/src/mame/machine/seicop.h
index 1698f202818..d5496314f7e 100644
--- a/src/mame/machine/seicop.h
+++ b/src/mame/machine/seicop.h
@@ -49,7 +49,6 @@ private:
 	int m_r0, m_r1;
 	UINT16 m_cop_rom_addr_lo,m_cop_rom_addr_hi,m_cop_rom_addr_unk;
 
-	UINT32 m_cop_sprite_dma_src;
 	int m_cop_sprite_dma_abs_x,m_cop_sprite_dma_abs_y;