From c7b8e151dcd7d892564a1cd0886718c2f5f8fcc0 Mon Sep 17 00:00:00 2001
From: Ivan Vangelista <mesgnet@yahoo.it>
Date: Thu, 21 Aug 2014 12:15:11 +0000
Subject: [PATCH] tc0480scp.c: added missing save states + small cleanup,
 improves but doesn't totally fix racingb save state (nw)

---
 src/mame/drivers/taito_z.c |  4 ++--
 src/mame/video/tc0480scp.c | 27 ++++++++++++++++-----------
 src/mame/video/tc0480scp.h |  2 +-
 3 files changed, 19 insertions(+), 14 deletions(-)

diff --git a/src/mame/drivers/taito_z.c b/src/mame/drivers/taito_z.c
index 39bc2259ea1..4eab8e842eb 100644
--- a/src/mame/drivers/taito_z.c
+++ b/src/mame/drivers/taito_z.c
@@ -951,9 +951,9 @@ Racing Beat
 
 Graphics problems:
 - tearing in the main road (tile layer 3 offset?)
-  likely cause is mame/video/taitoic.c in tc0480scp_bg23_draw:
+  likely cause is mame/video/tc0480scp.c in bg23_draw:
       ** flawed calc ?? **
-      x_index -= (tc0480scp->x_offs - 0x1f + layer * 4) * ((row_zoom & 0xff) << 8);
+      x_index -= (m_x_offset - 0x1f + layer * 4) * ((row_zoom & 0xff) << 8);
 - car sprites palette flickering
 - layer missing sometimes (random?) ie. motor block sprite after inserting coin
 
diff --git a/src/mame/video/tc0480scp.c b/src/mame/video/tc0480scp.c
index 3c063ee606b..a283456db73 100644
--- a/src/mame/video/tc0480scp.c
+++ b/src/mame/video/tc0480scp.c
@@ -139,16 +139,8 @@ const device_type TC0480SCP = &device_creator<tc0480scp_device>;
 
 tc0480scp_device::tc0480scp_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
 	: device_t(mconfig, TC0480SCP, "Taito TC0480SCP", tag, owner, clock, "tc0480scp", __FILE__),
-	// m_ctrl[0x18](0),
-	m_ram(NULL),
-	//m_bg_ram[4](NULL),
 	m_tx_ram(NULL),
 	m_char_ram(NULL),
-	//m_bgscroll_ram[4](NULL),
-	//m_rowzoom_ram[4](NULL),
-	//m_bgcolumn_ram[4](NULL),
-	//m_bgscrollx[4](NULL),
-	//m_bgscrolly[4](NULL),
 	m_pri_reg(0),
 	m_dblwidth(0),
 	m_gfxnum(0),
@@ -163,6 +155,17 @@ tc0480scp_device::tc0480scp_device(const machine_config &mconfig, const char *ta
 	m_gfxdecode(*this),
 	m_palette(*this)
 {
+	memset(m_ctrl, 0, sizeof(m_ctrl));
+	
+	for (int i = 0; i < 4; i++)
+	{
+		m_bg_ram[i] = NULL;
+		m_bgscroll_ram[i] = NULL;
+		m_rowzoom_ram[i] = NULL;
+		m_bgcolumn_ram[i] = NULL;
+		m_bgscrollx[i] = NULL;
+		m_bgscrolly[i] = NULL;
+	}
 }
 
 //-------------------------------------------------
@@ -275,15 +278,17 @@ void tc0480scp_device::device_start()
 		m_tilemap[3][i]->set_scroll_rows(512);
 	}
 
-	m_ram = auto_alloc_array_clear(machine(), UINT16, TC0480SCP_RAM_SIZE / 2);
-
+	m_ram.resize_and_clear(TC0480SCP_RAM_SIZE / 2);
 	set_layer_ptrs();
 
 	/* create the char set (gfx will then be updated dynamically from RAM) */
 	m_gfxdecode->set_gfx(m_txnum, global_alloc(gfx_element(m_palette, tc0480scp_charlayout, (UINT8 *)m_char_ram, NATIVE_ENDIAN_VALUE_LE_BE(8,0), 64, 0)));
 
-	save_pointer(NAME(m_ram), TC0480SCP_RAM_SIZE / 2);
+	save_item(NAME(m_ram));
 	save_item(NAME(m_ctrl));
+	save_item(NAME(m_bgscrollx));
+	save_item(NAME(m_bgscrolly));
+	save_item(NAME(m_pri_reg));
 	save_item(NAME(m_dblwidth));
 	machine().save().register_postload(save_prepost_delegate(FUNC(tc0480scp_device::postload), this));
 }
diff --git a/src/mame/video/tc0480scp.h b/src/mame/video/tc0480scp.h
index 4f98e6b4c63..76345f9baa7 100644
--- a/src/mame/video/tc0480scp.h
+++ b/src/mame/video/tc0480scp.h
@@ -69,7 +69,7 @@ private:
 	// internal state
 	UINT16           m_ctrl[0x18];
 
-	UINT16 *         m_ram;
+	dynamic_array<UINT16> m_ram;
 	UINT16 *         m_bg_ram[4];
 	UINT16 *         m_tx_ram;
 	UINT16 *         m_char_ram;