diff --git a/src/mame/drivers/r2dx_v33.c b/src/mame/drivers/r2dx_v33.c
index 65299400295..ee47e6ea82a 100644
--- a/src/mame/drivers/r2dx_v33.c
+++ b/src/mame/drivers/r2dx_v33.c
@@ -11,6 +11,11 @@ Temporary split from raiden2.c, it'll be re-merged at some point.
 Raiden 2 / DX checks if there's the string "RAIDEN" at start-up inside the eeprom, otherwise it dies.
 Then it puts settings at 0x9e08 and 0x9e0a (bp 91acb)
 
+
+	the 333 ROM is a 0x10000 byte table (bytes values?)
+	followed by a 0x400 bytes (word values)?
+	the remaining space is 0xff
+
 */
 
 #include "emu.h"
@@ -34,14 +39,15 @@ public:
 	optional_device<eeprom_serial_93cxx_device> m_eeprom;
 
 	DECLARE_WRITE16_MEMBER(r2dx_angle_w);
-	DECLARE_WRITE16_MEMBER(r2dx_dx_w);
-	DECLARE_WRITE16_MEMBER(r2dx_dy_w);
 
 	DECLARE_WRITE16_MEMBER(r2dx_unk1_w);
 	DECLARE_WRITE16_MEMBER(r2dx_unk2_w);
+	DECLARE_WRITE16_MEMBER(r2dx_dx_w);
+	DECLARE_WRITE16_MEMBER(r2dx_dy_w);
 
 	DECLARE_READ16_MEMBER(rdx_angle_r);
 	DECLARE_READ16_MEMBER(rdx_dist_r);
+
 	DECLARE_READ16_MEMBER(r2dx_sin_r);
 	DECLARE_READ16_MEMBER(r2dx_cos_r);
 
@@ -72,6 +78,7 @@ public:
 
 	int m_r2dxbank;
 	int m_r2dxgameselect;
+	INT16 m_r2dx_angle;
 
 	UINT32 screen_update_rdx_v33(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
 	INTERRUPT_GEN_MEMBER(rdx_v33_interrupt);
@@ -227,11 +234,28 @@ WRITE16_MEMBER(r2dx_v33_state::r2dx_rom_bank_w)
 //Olivier Galibert: 16-bits signed
 //Olivier Galibert: write dx/dy at 424/426, get dist and angle at 432/430 
 
+// Angle protection 1:
+// writes angle
 WRITE16_MEMBER(r2dx_v33_state::r2dx_angle_w)
 {
-
+	m_r2dx_angle = data;
 }
 
+// reads sin and cos
+READ16_MEMBER(r2dx_v33_state::r2dx_sin_r)
+{
+	double angle = m_r2dx_angle * M_PI / 128;
+	return int(2048*sin(angle));
+}
+
+READ16_MEMBER(r2dx_v33_state::r2dx_cos_r)
+{
+	double angle = m_r2dx_angle * M_PI / 128;
+	return int(2048*cos(angle));
+}
+
+// Angle protection 2:
+// write 2 co-ordinates?
 WRITE16_MEMBER(r2dx_v33_state::r2dx_dx_w)
 {
 
@@ -242,26 +266,6 @@ WRITE16_MEMBER(r2dx_v33_state::r2dx_dy_w)
 
 }
 
-READ16_MEMBER(r2dx_v33_state::rdx_angle_r)
-{
-	return 0x0000;
-}
-
-READ16_MEMBER(r2dx_v33_state::rdx_dist_r)
-{
-	return 0x0000;
-}
-
-READ16_MEMBER(r2dx_v33_state::r2dx_sin_r)
-{
-	return 0x0000;
-}
-
-READ16_MEMBER(r2dx_v33_state::r2dx_cos_r)
-{
-	return 0x0000;
-}
-
 WRITE16_MEMBER(r2dx_v33_state::r2dx_unk1_w)
 {
 
@@ -272,6 +276,20 @@ WRITE16_MEMBER(r2dx_v33_state::r2dx_unk2_w)
 
 }
 
+// reads angle and distance
+READ16_MEMBER(r2dx_v33_state::rdx_angle_r)
+{
+	return 0x0000;
+}
+
+READ16_MEMBER(r2dx_v33_state::rdx_dist_r)
+{
+	return 0x0000;
+}
+
+
+
+
 
 static ADDRESS_MAP_START( rdx_v33_map, AS_PROGRAM, 16, r2dx_v33_state )
 	AM_RANGE(0x00000, 0x003ff) AM_RAM // vectors copied here
@@ -283,15 +301,16 @@ static ADDRESS_MAP_START( rdx_v33_map, AS_PROGRAM, 16, r2dx_v33_state )
 	AM_RANGE(0x00404, 0x00405) AM_WRITE(r2dx_rom_bank_w)
 	AM_RANGE(0x00406, 0x00407) AM_WRITE(tile_bank_w)
 
-	AM_RANGE(0x00420, 0x00421) AM_WRITE(r2dx_unk1_w) // frequent
-	AM_RANGE(0x00422, 0x00423) AM_WRITE(r2dx_unk2_w) // frequent
-
+	AM_RANGE(0x00420, 0x00421) AM_WRITE(r2dx_unk1_w)
+	AM_RANGE(0x00422, 0x00423) AM_WRITE(r2dx_unk2_w)
 	AM_RANGE(0x00424, 0x00425) AM_WRITE(r2dx_dx_w)
 	AM_RANGE(0x00426, 0x00427) AM_WRITE(r2dx_dy_w)
+
 	AM_RANGE(0x00428, 0x00429) AM_WRITE(r2dx_angle_w)
 
 	AM_RANGE(0x00430, 0x00431) AM_READ(rdx_angle_r)
 	AM_RANGE(0x00432, 0x00433) AM_READ(rdx_dist_r)
+
 	AM_RANGE(0x00434, 0x00435) AM_READ(r2dx_sin_r)
 	AM_RANGE(0x00436, 0x00437) AM_READ(r2dx_cos_r)
 
@@ -352,15 +371,16 @@ static ADDRESS_MAP_START( nzeroteam_base_map, AS_PROGRAM, 16, r2dx_v33_state )
 	// 0x404 is bank on r2dx, this doesn't need it
 	// AM_RANGE(0x00406, 0x00407) AM_WRITE(tile_bank_w) // not the same?
 
-	AM_RANGE(0x00420, 0x00421) AM_WRITE(r2dx_unk1_w) // frequent
-	AM_RANGE(0x00422, 0x00423) AM_WRITE(r2dx_unk2_w) // frequent
-
+	AM_RANGE(0x00420, 0x00421) AM_WRITE(r2dx_unk1_w)
+	AM_RANGE(0x00422, 0x00423) AM_WRITE(r2dx_unk2_w)
 	AM_RANGE(0x00424, 0x00425) AM_WRITE(r2dx_dx_w)
 	AM_RANGE(0x00426, 0x00427) AM_WRITE(r2dx_dy_w)
+
 	AM_RANGE(0x00428, 0x00429) AM_WRITE(r2dx_angle_w)
 
 	AM_RANGE(0x00430, 0x00431) AM_READ(rdx_angle_r)
 	AM_RANGE(0x00432, 0x00433) AM_READ(rdx_dist_r)
+
 	AM_RANGE(0x00434, 0x00435) AM_READ(r2dx_sin_r)
 	AM_RANGE(0x00436, 0x00437) AM_READ(r2dx_cos_r)
 
@@ -727,10 +747,12 @@ DRIVER_INIT_MEMBER(r2dx_v33_state,rdx_v33)
 
 	membank("okibank")->configure_entries(0, 4, memregion("oki")->base(), 0x40000);
 	membank("okibank")->set_entry(0);
-//  sensible defaults if booting as RDX - we set now set this later..
-//	membank("bank1")->set_entry(0x20+16);
-//	membank("bank2")->set_entry(0x20+3);
-//	membank("bank3")->set_entry(1);
+	//  sensible defaults if booting as RDX - we set now set this later..
+	//	membank("bank1")->set_entry(0x20+16);
+	//	membank("bank2")->set_entry(0x20+3);
+	//	membank("bank3")->set_entry(1);
+
+
 
 
 }