diff --git a/src/mame/drivers/saturn.c b/src/mame/drivers/saturn.c
index 63135cb1f6f..06c423a913a 100644
--- a/src/mame/drivers/saturn.c
+++ b/src/mame/drivers/saturn.c
@@ -18,9 +18,9 @@ Notes:
 TODO:
 (Main issues)
 - decap the SH-1, used for CD block (needed especially for Sega Saturn)
-- IRQs: some games have some issues with timing accurate IRQs,check/fix all of them.
+- IRQs: some games have some issues with timing accurate IRQs, check/fix all of them.
 - The Cart-Dev mode hangs even with the -dev bios,I would like to see what it does on the real HW.
-- IC13 games on the bios dev doesn't even load the cartridge / crashes the emulation at start-up,
+- IC13 games on the dev bios doesn't even load the cartridge / crashes the emulation at start-up,
   rom rearrange needed?
 - SCU DSP still has its fair share of issues, it also needs to be converted to CPU structure;
 - Add the RS232c interface (serial port),needed by fhboxers.
@@ -28,15 +28,14 @@ TODO:
 - Reimplement the idle skip if possible.
 - clean up the I/Os, by using per-game specific mapped ports and rewrite it by using 16-bit trampolines
 - Properly emulate the protection chips, used by several games (check stvprot.c for more info)
-- Move SCU device into its respective files;
+- Move SCU device into its respective file;
 - Split ST-V and Saturn files properly;
-- completely rewrite IOGA for ST-V;
 
 (per-game issues)
 - stress: accesses the Sound Memory Expansion Area (0x05a80000-0x05afffff), unknown purpose;
 - smleague / finlarch: it randomly hangs / crashes,it works if you use a ridiculous MCFG_INTERLEAVE number,might need strict
   SH-2 synching.
-- suikoenb/shanhigw + others: why do we get 2 credits on startup? Cause might be by a communication with the M68k
+- groovef / myfairld: why do we get 2 credits on startup? Cause might be by a communication with the M68k
 - myfairld: Apparently this game gives a black screen (either test mode and in-game mode),but let it wait for about
   10 seconds and the game will load everything. This is because of a hellishly slow m68k sub-routine located at 54c2.
   Likely to not be a bug but an in-game design issue.
@@ -500,7 +499,7 @@ static READ32_HANDLER( saturn_scu_r )
 	saturn_state *state = space->machine().driver_data<saturn_state>();
 	UINT32 res;
 
-	/*TODO: write only registers must return 0...*/
+	/*TODO: write only registers must return 0 or open bus */
 	switch(offset)
 	{
 		case 0x5c/4:
@@ -2038,9 +2037,6 @@ static TIMER_DEVICE_CALLBACK( saturn_scanline )
 	{
 		video_update_vdp1(timer.machine());
 
-		if(STV_VDP1_VBE)
-			state->m_vdp1.framebuffer_clear_on_next_frame = 1;
-
 		if(!(state->m_scu.ism & IRQ_VDP1_END))
 		{
 			device_set_input_line_and_vector(state->m_maincpu, 0x2, HOLD_LINE, 0x4d);
@@ -2070,6 +2066,9 @@ static TIMER_DEVICE_CALLBACK( saturn_scanline )
 		}
 		else
 			state->m_scu.ist |= (IRQ_VBLANK_IN);
+
+		if(STV_VDP1_VBE)
+			state->m_vdp1.framebuffer_clear_on_next_frame = 1;
 	}
 	else if((scanline % y_step) == 0 && scanline < vblank_line*y_step)
 	{
diff --git a/src/mame/video/stvvdp1.c b/src/mame/video/stvvdp1.c
index 586d05f68b9..80f2148f78b 100644
--- a/src/mame/video/stvvdp1.c
+++ b/src/mame/video/stvvdp1.c
@@ -1959,19 +1959,25 @@ static void stv_vdp1_process_list(running_machine &machine)
 			switch (stv2_current_sprite.CMDCTRL & 0x000f)
 			{
 				case 0x0000:
-					if (VDP1_LOG) logerror ("Sprite List Normal Sprite\n");
+					if (VDP1_LOG) logerror ("Sprite List Normal Sprite (%d %d)\n",stv2_current_sprite.CMDXA,stv2_current_sprite.CMDYA);
 					stv2_current_sprite.ispoly = 0;
 					stv_vpd1_draw_normal_sprite(machine, cliprect, 0);
 					break;
 
 				case 0x0001:
-					if (VDP1_LOG) logerror ("Sprite List Scaled Sprite\n");
+					if (VDP1_LOG) logerror ("Sprite List Scaled Sprite (%d %d)\n",stv2_current_sprite.CMDXA,stv2_current_sprite.CMDYA);
 					stv2_current_sprite.ispoly = 0;
 					stv_vpd1_draw_scaled_sprite(machine, cliprect);
 					break;
 
 				case 0x0002:
 					if (VDP1_LOG) logerror ("Sprite List Distorted Sprite\n");
+					if (VDP1_LOG) logerror ("(A: %d %d)\n",stv2_current_sprite.CMDXA,stv2_current_sprite.CMDYA);
+					if (VDP1_LOG) logerror ("(B: %d %d)\n",stv2_current_sprite.CMDXB,stv2_current_sprite.CMDYB);
+					if (VDP1_LOG) logerror ("(C: %d %d)\n",stv2_current_sprite.CMDXC,stv2_current_sprite.CMDYC);
+					if (VDP1_LOG) logerror ("(D: %d %d)\n",stv2_current_sprite.CMDXD,stv2_current_sprite.CMDYD);
+					if (VDP1_LOG) logerror ("CMDPMOD = %04x\n",stv2_current_sprite.CMDPMOD);
+
 					stv2_current_sprite.ispoly = 0;
 					stv_vpd1_draw_distorted_sprite(machine, cliprect);
 					break;
@@ -2011,7 +2017,7 @@ static void stv_vdp1_process_list(running_machine &machine)
 					break;
 
 				case 0x000a:
-					if (VDP1_LOG) logerror ("Sprite List Local Co-Ordinate Set\n");
+					if (VDP1_LOG) logerror ("Sprite List Local Co-Ordinate Set (%d %d)\n",(INT16)stv2_current_sprite.CMDXA,(INT16)stv2_current_sprite.CMDYA);
 					state->m_vdp1.local_x = (INT16)stv2_current_sprite.CMDXA;
 					state->m_vdp1.local_y = (INT16)stv2_current_sprite.CMDYA;
 					break;
@@ -2112,7 +2118,7 @@ void video_update_vdp1(running_machine &machine)
 		case 1:/*Draw by request*/
 			break;
 		case 2:/*Automatic Draw*/
-			if ( framebuffer_changed )
+			if ( framebuffer_changed || VDP1_LOG )
 			{
 				/*set CEF to 1*/
 				stv_vdp1_process_list(machine);