diff --git a/src/devices/sound/ay8910.cpp b/src/devices/sound/ay8910.cpp
index 8fc807939d5..f5456163398 100644
--- a/src/devices/sound/ay8910.cpp
+++ b/src/devices/sound/ay8910.cpp
@@ -1147,7 +1147,7 @@ void ay8910_device::build_mixer_table()
 	 */
 	else
 	{
-		build_3D_table(m_res_load[0], m_par, m_par_env, normalize, 3, m_zero_is_off, m_vol3d_table);
+		build_3D_table(m_res_load[0], m_par, m_par_env, normalize, 3, m_zero_is_off, m_vol3d_table.get());
 	}
 }
 
@@ -1200,6 +1200,8 @@ void ay8910_device::device_start()
 		m_streams = 1;
 	}
 
+	m_vol3d_table = make_unique_clear<int32_t[]>(8*32*32*32);
+
 	build_mixer_table();
 
 	/* The envelope is pacing twice as fast for the YM2149 as for the AY-3-8910,    */
@@ -1512,7 +1514,6 @@ ay8910_device::ay8910_device(const machine_config &mconfig, device_type type, co
 	memset(&m_vol_enabled,0,sizeof(m_vol_enabled));
 	memset(&m_vol_table,0,sizeof(m_vol_table));
 	memset(&m_env_table,0,sizeof(m_env_table));
-	memset(&m_vol3d_table,0,sizeof(m_vol3d_table));
 	m_res_load[0] = m_res_load[1] = m_res_load[2] = 1000; //Default values for resistor loads
 
 	set_type(psg_type);
diff --git a/src/devices/sound/ay8910.h b/src/devices/sound/ay8910.h
index d62d838e14a..ef796ee7071 100644
--- a/src/devices/sound/ay8910.h
+++ b/src/devices/sound/ay8910.h
@@ -190,7 +190,7 @@ private:
 	const ay_ym_param *m_par_env;
 	int32_t m_vol_table[NUM_CHANNELS][16];
 	int32_t m_env_table[NUM_CHANNELS][32];
-	int32_t m_vol3d_table[8*32*32*32];
+	std::unique_ptr<int32_t[]> m_vol3d_table;
 	int m_flags;          /* Flags */
 	int m_res_load[3];    /* Load on channel in ohms */
 	devcb_read8 m_port_a_read_cb;
diff --git a/src/mame/audio/taito_en.cpp b/src/mame/audio/taito_en.cpp
index 9c93d26d784..2cc1ac987e2 100644
--- a/src/mame/audio/taito_en.cpp
+++ b/src/mame/audio/taito_en.cpp
@@ -39,9 +39,12 @@ taito_en_device::taito_en_device(const machine_config &mconfig, const char *tag,
 
 void taito_en_device::device_start()
 {
+	// TODO: 16Mx32? Not likely!
+	m_es5510_dram = std::make_unique<uint32_t[]>(1<<24);
+
+	save_pointer(NAME(m_es5510_dram.get()), 1<<24);
 	save_item(NAME(m_es5510_dsp_ram));
 	save_item(NAME(m_es5510_gpr));
-	save_item(NAME(m_es5510_dram));
 	save_item(NAME(m_es5510_dol_latch));
 	save_item(NAME(m_es5510_dil_latch));
 	save_item(NAME(m_es5510_dadr_latch));
diff --git a/src/mame/audio/taito_en.h b/src/mame/audio/taito_en.h
index f4a1ae3824a..8f71884484b 100644
--- a/src/mame/audio/taito_en.h
+++ b/src/mame/audio/taito_en.h
@@ -43,9 +43,9 @@ private:
 	required_device<mb87078_device> m_mb87078;
 
 	//todo: hook up cpu/es5510
+	std::unique_ptr<uint32_t[]> m_es5510_dram;
 	uint16_t   m_es5510_dsp_ram[0x200];
 	uint32_t   m_es5510_gpr[0xc0];
-	uint32_t   m_es5510_dram[1<<24];
 	uint32_t   m_es5510_dol_latch;
 	uint32_t   m_es5510_dil_latch;
 	uint32_t   m_es5510_dadr_latch;
diff --git a/src/mame/video/powervr2.cpp b/src/mame/video/powervr2.cpp
index 10e3abd67d3..8f47668e1ed 100644
--- a/src/mame/video/powervr2.cpp
+++ b/src/mame/video/powervr2.cpp
@@ -940,9 +940,10 @@ WRITE32_MEMBER( powervr2_device::softreset_w )
 		logerror("%s: Core Pipeline soft reset\n", tag());
 #endif
 		if (start_render_received == 1) {
-			for (auto & elem : grab)
-				if (elem.busy == 1)
-					elem.busy = 0;
+			for (int a=0;a < NUM_BUFFERS;a++)
+				if (grab[a].busy == 1)
+					grab[a].busy = 0;
+
 			start_render_received = 0;
 		}
 	}
@@ -3620,7 +3621,8 @@ void powervr2_device::device_start()
 {
 	irq_cb.resolve_safe();
 
-	memset(grab, 0, sizeof(grab));
+	grab = make_unique_clear<receiveddata[]>(NUM_BUFFERS);
+
 	pvr_build_parameterconfig();
 
 	computedilated();
diff --git a/src/mame/video/powervr2.h b/src/mame/video/powervr2.h
index afdf4b23458..ed800973a0c 100644
--- a/src/mame/video/powervr2.h
+++ b/src/mame/video/powervr2.h
@@ -108,7 +108,7 @@ public:
 	int renderselect;
 	int listtype_used;
 	int alloc_ctrl_OPB_Mode, alloc_ctrl_PT_OPB, alloc_ctrl_TM_OPB, alloc_ctrl_T_OPB, alloc_ctrl_OM_OPB, alloc_ctrl_O_OPB;
-	receiveddata grab[NUM_BUFFERS];
+	std::unique_ptr<receiveddata[]> grab;
 	int grabsel;
 	int grabsellast;
 	uint32_t paracontrol,paratype,endofstrip,listtype,global_paratype,parameterconfig;