diff --git a/src/burn/burn_gun.cpp b/src/burn/burn_gun.cpp
index ac6825e3d..be2859597 100644
--- a/src/burn/burn_gun.cpp
+++ b/src/burn/burn_gun.cpp
@@ -56,7 +56,7 @@ static void GunTargetUpdate(INT32 player)
 
 static UINT8 GunTargetShouldDraw(INT32 player)
 {
-	return (nCurrentFrame < GunTargetTimer[player] + GunTargetHideTime);
+	return ((INT32)nCurrentFrame < GunTargetTimer[player] + GunTargetHideTime);
 }
 #undef GunTargetHideTime
 
diff --git a/src/burn/drv/konami/d_battlnts.cpp b/src/burn/drv/konami/d_battlnts.cpp
index 52caf5562..eb866e004 100644
--- a/src/burn/drv/konami/d_battlnts.cpp
+++ b/src/burn/drv/konami/d_battlnts.cpp
@@ -336,7 +336,7 @@ static UINT8 __fastcall battlnts_sound_read(UINT16 address)
 	return 0;
 }
 
-static void battlnts_tile_callback(INT32 layer, INT32 bank, INT32 *code, INT32 *color, INT32 *flags)
+static void battlnts_tile_callback(INT32 /*layer*/, INT32 /*bank*/, INT32 *code, INT32 *color, INT32 */*flags*/)
 {
 	*code |= ((*color & 0x0f) << 9) | ((*color & 0x40) << 2);
 	*color = 0;
diff --git a/src/burn/drv/konami/d_bladestl.cpp b/src/burn/drv/konami/d_bladestl.cpp
index d78258e3c..309029f2c 100644
--- a/src/burn/drv/konami/d_bladestl.cpp
+++ b/src/burn/drv/konami/d_bladestl.cpp
@@ -204,7 +204,7 @@ static void bladestl_main_write(UINT16 address, UINT8 data)
 	}
 }
 
-static UINT8 trackball_read(INT32 offset)
+static UINT8 trackball_read(INT32 /*offset*/)
 {
 /*
 	int curr = m_trackball[offset]->read();
@@ -287,7 +287,7 @@ static UINT8 bladestl_sound_read(UINT16 address)
 	return 0;
 }
 
-static void bladestl_tile_callback(INT32 layer, INT32 bank, INT32 *code, INT32 *color, INT32 *flags)
+static void bladestl_tile_callback(INT32 layer, INT32 /*bank*/, INT32 *code, INT32 *color, INT32 */*flags*/)
 {
 	*code |= ((*color & 0x0f) << 8) | ((*color & 0x40) << 6);
 	*color = 0x10 + layer;
diff --git a/src/burn/drv/konami/d_gyruss.cpp b/src/burn/drv/konami/d_gyruss.cpp
index b9196b55f..2dc115cfa 100644
--- a/src/burn/drv/konami/d_gyruss.cpp
+++ b/src/burn/drv/konami/d_gyruss.cpp
@@ -342,7 +342,7 @@ static void filter_write(INT32 num, UINT8 d)
 	filter_rc_set_RC(num, FLT_RC_LOWPASS, 1000, 5100, 0, CAP_P(C));
 }
 
-void AY8910_0_portBwrite(UINT32 port, UINT32 data)
+void AY8910_0_portBwrite(UINT32 /*port*/, UINT32 data)
 {
 	if (ZetGetActive() == -1) return;
 
@@ -356,7 +356,7 @@ void AY8910_0_portBwrite(UINT32 port, UINT32 data)
 	}
 }
 
-void AY8910_1_portBwrite(UINT32 port, UINT32 data)
+void AY8910_1_portBwrite(UINT32 /*port*/, UINT32 data)
 {
 	if (ZetGetActive() == -1) return;
 
diff --git a/src/burn/drv/konami/d_labyrunr.cpp b/src/burn/drv/konami/d_labyrunr.cpp
index 4f0962772..2e0ff07c6 100644
--- a/src/burn/drv/konami/d_labyrunr.cpp
+++ b/src/burn/drv/konami/d_labyrunr.cpp
@@ -585,7 +585,7 @@ static void draw_layer(INT32 layer)
 	}
 }
 
-static void k007121_sprites_draw(UINT8 *gfx, UINT32 *palette, UINT8 *source, int base_color, int global_x_offset, int bank_base, UINT32 pri_mask )
+static void k007121_sprites_draw(UINT8 *gfx, UINT32 */*palette*/, UINT8 *source, int base_color, int global_x_offset, int bank_base, UINT32 /*pri_mask*/)
 {
 	INT32 flipscreen = K007121CtrlRAM[7] & 0x08;
 
diff --git a/src/burn/drv/konami/d_nemesis.cpp b/src/burn/drv/konami/d_nemesis.cpp
index f574a2d3a..2c62b26fb 100644
--- a/src/burn/drv/konami/d_nemesis.cpp
+++ b/src/burn/drv/konami/d_nemesis.cpp
@@ -1227,7 +1227,7 @@ static UINT8 konamigt_read_wheel()
 	return Temp2;
 }
 
-static UINT16 konamigt_read_analog(int Offset)
+static UINT16 konamigt_read_analog(int /*Offset*/)
 {
 	UINT16 nRet = 0;
 
diff --git a/src/burn/drv/konami/d_rockrage.cpp b/src/burn/drv/konami/d_rockrage.cpp
index cbd86c645..4366cba30 100644
--- a/src/burn/drv/konami/d_rockrage.cpp
+++ b/src/burn/drv/konami/d_rockrage.cpp
@@ -244,7 +244,7 @@ static UINT32 DrvVLM5030Sync(INT32 samples_rate)
 	return (samples_rate * M6809TotalCycles()) / 25000;
 }
 
-static void rockrage_tile_callback(INT32 layer, INT32 bank, INT32 *code, INT32 *color, INT32 *flags)
+static void rockrage_tile_callback(INT32 layer, INT32 bank, INT32 *code, INT32 *color, INT32 */*flags*/)
 {
 	if (layer == 1) {
 		*code |= ((*color & 0x40) << 2) | ((bank & 0x01) << 9);
diff --git a/src/burn/drv/konami/k007342_k007420.cpp b/src/burn/drv/konami/k007342_k007420.cpp
index 4ba316949..8740d8aab 100644
--- a/src/burn/drv/konami/k007342_k007420.cpp
+++ b/src/burn/drv/konami/k007342_k007420.cpp
@@ -44,7 +44,7 @@ INT32 K007342_irq_enabled()
 	return (K007342Regs[0][0] & 0x02);
 }
 
-void K007342DrawLayer(INT32 layer, INT32 baseflags, INT32 priority)
+void K007342DrawLayer(INT32 layer, INT32 baseflags, INT32 /*priority*/)
 {
 //	INT32 flipscreen = K007342Regs[0][0] & 0x10;
 
diff --git a/src/burn/drv/konami/timeplt_snd.cpp b/src/burn/drv/konami/timeplt_snd.cpp
index 9fc5fd931..21052e707 100644
--- a/src/burn/drv/konami/timeplt_snd.cpp
+++ b/src/burn/drv/konami/timeplt_snd.cpp
@@ -21,7 +21,7 @@ static void filter_write(INT32 num, UINT8 d)
 
 static void __fastcall timeplt_sound_write(UINT16 address, UINT8 data)
 {
-	if (address >= 0x8000 && address <= 0xffff) {
+	if (address >= 0x8000 /*&& address <= 0xffff*/) {
 		INT32 Offset = address & 0xfff;
 		filter_write(3, (Offset >>  0) & 3);
 		filter_write(4, (Offset >>  2) & 3);
diff --git a/src/burn/drv/neogeo/neo_text.cpp b/src/burn/drv/neogeo/neo_text.cpp
index bb9b7a73e..3355ea040 100644
--- a/src/burn/drv/neogeo/neo_text.cpp
+++ b/src/burn/drv/neogeo/neo_text.cpp
@@ -313,22 +313,22 @@ static void NeoTextBlendInit(INT32 nSlot)
 		if (strncmp ("Name", szLine, 4) == 0) continue; 	// don't care
 		if (szLine[0] == ';') continue;				// comment (also don't care)
 
-		int type;
-		unsigned int min,max,k, single_entry = -1;
+		INT32 type;
+		UINT32 min,max,k, single_entry = (UINT32)-1;
 
 		for (k = 0; k < strlen(szLine); k++) {
 			if (szLine[k] == '-') { single_entry = k+1; break; }
 		}
 
-		if (single_entry < 0) {
+/*		if (single_entry < 0) {
 			sscanf(szLine,"%x %d",&max,&type);
 			min = max;
-		} else {
+		} else {*/
 			sscanf(szLine,"%x",&min);
 			sscanf(szLine+single_entry,"%x %d",&max,&type);
-		}
+//		}
 
-		for (k = min; k <= max && k < (nNeoTextROMSize[nSlot]/0x20); k++) {
+		for (k = min; k <= max && k < ((UINT32)nNeoTextROMSize[nSlot]/0x20); k++) {
 			if (NeoTextTileAttrib[nSlot][k] != 1) 	// ?
 				NeoTextTileAttrib[nSlot][k] = table[type&3];
 		}
diff --git a/src/burn/drv/pgm/pgm_asic27a_type3.cpp b/src/burn/drv/pgm/pgm_asic27a_type3.cpp
index a73e853a5..e02cd5b23 100644
--- a/src/burn/drv/pgm/pgm_asic27a_type3.cpp
+++ b/src/burn/drv/pgm/pgm_asic27a_type3.cpp
@@ -32,7 +32,7 @@ static void svg_set_ram_bank(INT32 data)
 	SekMapMemory(svg_ram[svg_ram_sel^1],	0x500000, 0x50ffff, MAP_RAM);
 }
 
-static void __fastcall svg_write_byte(UINT32 address, UINT8 data)
+static void __fastcall svg_write_byte(UINT32 address, UINT8 /*data*/)
 {
 	pgm_cpu_sync();
 
diff --git a/src/burn/drv/pre90s/d_dkong.cpp b/src/burn/drv/pre90s/d_dkong.cpp
index 02576b39b..e2d264ade 100644
--- a/src/burn/drv/pre90s/d_dkong.cpp
+++ b/src/burn/drv/pre90s/d_dkong.cpp
@@ -1170,7 +1170,7 @@ static UINT8 dkong3_sound0_read(UINT16 a)
 	return 0;
 }
 
-static void dkong3_sound1_write(UINT16 a, UINT8 d)
+static void dkong3_sound1_write(UINT16 a, UINT8 /*d*/)
 {
 //bprintf (0, _T("s1: %4.4x, %2.2x, %d\n"), a, d, M6502GetActive());
 	if ((a & 0xffe0) == 0x4000) {
diff --git a/src/burn/drv/pre90s/d_mario.cpp b/src/burn/drv/pre90s/d_mario.cpp
index dfa74f84d..f775cda23 100644
--- a/src/burn/drv/pre90s/d_mario.cpp
+++ b/src/burn/drv/pre90s/d_mario.cpp
@@ -430,7 +430,7 @@ static struct BurnSampleInfo MarioSampleDesc[] = {
 	{ "run.wav",		SAMPLE_NOLOOP },
 	{ "luigirun.wav",	SAMPLE_NOLOOP },
 #endif
-	{ 0, 0 }
+	{ "", 0 }
 };
 
 STD_SAMPLE_PICK(Mario)
diff --git a/src/burn/drv/pre90s/d_megasys1.cpp b/src/burn/drv/pre90s/d_megasys1.cpp
index f3eab5685..6c9f25f2b 100644
--- a/src/burn/drv/pre90s/d_megasys1.cpp
+++ b/src/burn/drv/pre90s/d_megasys1.cpp
@@ -1417,7 +1417,7 @@ static UINT8 __fastcall mcu_prot_read_byte(UINT32 address)
 
 static UINT16 __fastcall mcu_prot_read_word(UINT32 address)
 {
-	if (mcu_hs && ((mcu_ram[4] << 6) & 0x3ffc0) == (address & 0x3ffc0))
+	if ((UINT32)mcu_hs && (((UINT32)mcu_ram[4] << 6) & 0x3ffc0) == (address & 0x3ffc0))
 	{
 		return mcu_config[2];
 	}
diff --git a/src/burn/drv/pre90s/d_mrdo.cpp b/src/burn/drv/pre90s/d_mrdo.cpp
index 81f33f832..fa164a26e 100644
--- a/src/burn/drv/pre90s/d_mrdo.cpp
+++ b/src/burn/drv/pre90s/d_mrdo.cpp
@@ -206,7 +206,7 @@ static void mrdo_palette_init()
 		}
 		else pot[i] = 0;
 
-		weight[i] = 0xff * pot[i] / pot[0x0f];
+		weight[i] = (INT32)(0xff * pot[i] / pot[0x0f]);
 		if (weight[i] < 0) weight[i] = 0;
 	}
 
diff --git a/src/burn/drv/pre90s/d_suna8.cpp b/src/burn/drv/pre90s/d_suna8.cpp
index b9d504e32..da9890e3b 100644
--- a/src/burn/drv/pre90s/d_suna8.cpp
+++ b/src/burn/drv/pre90s/d_suna8.cpp
@@ -51,7 +51,7 @@ static INT32 watchdog_enable = 0;
 static INT32 watchdog;
 
 static INT32 sample_start = -1;
-static INT32 sample_offset;
+static INT32 sample_offset = 0;
 static UINT8 sample_number = 0;
 
 static UINT8 m_gfxbank = 0;
@@ -481,7 +481,7 @@ static void sample_render(INT16 *buffer, INT32 nLen)
 
 	while (pos < nLen)
 	{
-		INT32 sample = rom[(sample_offset >> 16)] * 0.2;
+		INT32 sample = (INT32)(rom[(sample_offset >> 16)] * 0.2);
 
 		buffer[0] = BURN_SND_CLIP((INT32)(buffer[0] + sample));
 		buffer[1] = BURN_SND_CLIP((INT32)(buffer[1] + sample));
@@ -1283,7 +1283,7 @@ static void CommonDoReset(INT32 clear_ram)
 	watchdog = 0;
 
 	sample_start = -1;
-	sample_offset;
+	sample_offset = 0;
 	sample_number = 0;
 
 	m_gfxbank = 0;
diff --git a/src/burn/drv/pre90s/d_tecmo.cpp b/src/burn/drv/pre90s/d_tecmo.cpp
index e0605ed0a..75f3011f0 100644
--- a/src/burn/drv/pre90s/d_tecmo.cpp
+++ b/src/burn/drv/pre90s/d_tecmo.cpp
@@ -1693,4 +1693,4 @@ struct BurnDriver BurnDrvGeminib = {
 	NULL, geminibRomInfo, geminibRomName, NULL, NULL, GeminiInputInfo, GeminiDIPInfo,
 	GeminiInit, DrvExit, DrvFrame, DrvDraw, DrvScan, &DrvRecalc, 0x400,
 	224, 256, 3, 4
-};
\ No newline at end of file
+};
diff --git a/src/burn/drv/pre90s/d_xain.cpp b/src/burn/drv/pre90s/d_xain.cpp
index bbbcea8be..bc28a07bc 100644
--- a/src/burn/drv/pre90s/d_xain.cpp
+++ b/src/burn/drv/pre90s/d_xain.cpp
@@ -1331,4 +1331,4 @@ struct BurnDriverD BurnDrvXsleenab2 = {
 	NULL, xsleenab2RomInfo, xsleenab2RomName, NULL, NULL, DrvInputInfo, DrvDIPInfo,
 	DrvInit, DrvExit, DrvFrame, DrvDraw, DrvScan, &DrvRecalc, 0x200,
 	256, 240, 4, 3
-};
\ No newline at end of file
+};
diff --git a/src/burn/drv/pst90s/d_dooyong.cpp b/src/burn/drv/pst90s/d_dooyong.cpp
index b1901f74a..703e03b2b 100644
--- a/src/burn/drv/pst90s/d_dooyong.cpp
+++ b/src/burn/drv/pst90s/d_dooyong.cpp
@@ -2337,7 +2337,7 @@ static INT32 Drv68KExit()
 	return 0;
 }
 
-static void DrawLayer(UINT8 *rom, UINT8 *scroll, UINT8 *gfxbase, INT32 gfxlenmask, INT32 colorbase, UINT8 *transtab, INT32 transp, INT32 depth, INT32 pri)
+static void DrawLayer(UINT8 *rom, UINT8 *scroll, UINT8 *gfxbase, INT32 gfxlenmask, INT32 colorbase, UINT8 *transtab, INT32 transp, INT32 depth, INT32 /*pri*/)
 {
 	if (scroll[6] & 0x10) return;
 
@@ -2420,7 +2420,7 @@ static void DrawLayer(UINT8 *rom, UINT8 *scroll, UINT8 *gfxbase, INT32 gfxlenmas
 	}
 }
 
-static void draw_layer_rshark(UINT8 *tmaprom0, UINT8 *tmaprom1, UINT8 *scroll, UINT8 *gfxbase, INT32 gfxlenmask, INT32 colorbase, UINT8 *transtab, INT32 transp, INT32 pri)
+static void draw_layer_rshark(UINT8 *tmaprom0, UINT8 *tmaprom1, UINT8 *scroll, UINT8 *gfxbase, INT32 gfxlenmask, INT32 colorbase, UINT8 *transtab, INT32 transp, INT32 /*pri*/)
 {
 	INT32 scrollx = scroll[0] + 64;
 	INT32 scrolly = (scroll[3] + (scroll[4] * 256) + global_y) & 0x1ff;
@@ -2477,7 +2477,7 @@ static void draw_layer_rshark(UINT8 *tmaprom0, UINT8 *tmaprom1, UINT8 *scroll, U
 	}
 }
 
-static void DrawTextLayer(INT32 mode, INT32 pri, INT32 scroll_adj)
+static void DrawTextLayer(INT32 mode, INT32 /*pri*/, INT32 scroll_adj)
 {
 	for (INT32 offs = 0; offs < 64 * 32; offs++)
 	{
diff --git a/src/burn/drv/pst90s/d_fuukifg3.cpp b/src/burn/drv/pst90s/d_fuukifg3.cpp
index d8619a088..fe8091d46 100644
--- a/src/burn/drv/pst90s/d_fuukifg3.cpp
+++ b/src/burn/drv/pst90s/d_fuukifg3.cpp
@@ -1484,4 +1484,4 @@ struct BurnDriver BurnDrvAsurabusa = {
 	NULL, asurabusaRomInfo, asurabusaRomName, NULL, NULL, AsurabusaInputInfo, AsurabusDIPInfo,
 	DrvInit, DrvExit, DrvFrame, DrvDraw, DrvScan, &DrvRecalc, 0x2000,
 	320, 240, 4, 3
-};
\ No newline at end of file
+};
diff --git a/src/burn/drv/sega/d_outrun.cpp b/src/burn/drv/sega/d_outrun.cpp
index d61b0f818..8560743d2 100644
--- a/src/burn/drv/sega/d_outrun.cpp
+++ b/src/burn/drv/sega/d_outrun.cpp
@@ -1887,4 +1887,4 @@ struct BurnDriver BurnDrvToutrunj1 = {
 	NULL, Toutrunj1RomInfo, Toutrunj1RomName, NULL, NULL, ToutrunInputInfo, ToutrunctDIPInfo,
 	ToutrunInit, System16Exit, OutrunFrame, NULL, System16Scan,
 	NULL, 0x3000, 320, 224, 4, 3
-};
\ No newline at end of file
+};
diff --git a/src/burn/drv/sg1000/d_sg1000.cpp b/src/burn/drv/sg1000/d_sg1000.cpp
index faf27ea8c..ff22d33e1 100644
--- a/src/burn/drv/sg1000/d_sg1000.cpp
+++ b/src/burn/drv/sg1000/d_sg1000.cpp
@@ -162,12 +162,12 @@ static int MemIndex()
 	return 0;
 }
 
-static void __fastcall sg1000_write(UINT16 address, UINT8 data)
+static void __fastcall sg1000_write(UINT16 /*address*/, UINT8 /*data*/)
 {
 	//bprintf(0, _T("a[%X] d[%X],"), address, data);
 }
 
-static UINT8 __fastcall sg1000_read(UINT16 address)
+static UINT8 __fastcall sg1000_read(UINT16 /*address*/)
 {
 	//bprintf(0, _T("a[%X],"), address);
 	return 0;
diff --git a/src/burn/drv/sms/d_sms.cpp b/src/burn/drv/sms/d_sms.cpp
index 8327f8602..f1d031b8b 100644
--- a/src/burn/drv/sms/d_sms.cpp
+++ b/src/burn/drv/sms/d_sms.cpp
@@ -172,7 +172,7 @@ INT32 SMSFrame()
 	return 0;
 }
 
-void system_manage_sram(uint8 *sram, int slot, int mode)
+void system_manage_sram(uint8 */*sram*/, int /*slot*/, int /*mode*/)
 {
 
 }
@@ -423,7 +423,7 @@ static void system_load_state()
     for(INT32 i = 0; i < 0x200; i++)
     {
         bg_name_list[i] = i;
-        bg_name_dirty[i] = -1;
+        bg_name_dirty[i] = (UINT8)-1;
     }
 
     /* Restore palette */
diff --git a/src/burn/drv/sms/sms.cpp b/src/burn/drv/sms/sms.cpp
index cf2c76ac3..5c039f5cc 100644
--- a/src/burn/drv/sms/sms.cpp
+++ b/src/burn/drv/sms/sms.cpp
@@ -341,7 +341,7 @@ UINT8 _fastcall sms_port_r(UINT16 port)
     }
 
     /* Just to please the compiler */
-    return -1;
+    return 0;
 }
 
 
@@ -420,7 +420,7 @@ UINT8 _fastcall smsj_port_r(UINT16 port)
     }
 
     /* Just to please the compiler */
-    return -1;
+    return 0;
 }
 
 
@@ -492,7 +492,7 @@ UINT8 _fastcall gg_port_r(UINT16 port)
     }
 
     /* Just to please the compiler */
-    return -1;
+    return 0;
 }
 
 /*--------------------------------------------------------------------------*/
@@ -553,7 +553,7 @@ UINT8 _fastcall ggms_port_r(UINT16 port)
     }
 
     /* Just to please the compiler */
-    return -1;
+    return 0;
 }
 
 /*--------------------------------------------------------------------------*/
@@ -611,6 +611,6 @@ UINT8 _fastcall md_port_r(UINT16 port)
     }
 
     /* Just to please the compiler */
-    return -1;
+    return 0;
 }
 
diff --git a/src/burn/drv/sms/smsfmintf.cpp b/src/burn/drv/sms/smsfmintf.cpp
index febf69479..1fe9788ea 100644
--- a/src/burn/drv/sms/smsfmintf.cpp
+++ b/src/burn/drv/sms/smsfmintf.cpp
@@ -64,7 +64,7 @@ void FM_Reset(void)
 }
 
 
-void FM_Update(int16 **buffer, int length)
+void FM_Update(int16 **/*buffer*/, int /*length*/)
 {
 /*    switch(snd.fm_which)
     {
@@ -78,13 +78,13 @@ void FM_Update(int16 **buffer, int length)
     }*/
 }
 
-void FM_WriteReg(int reg, int data)
+void FM_WriteReg(int /*reg*/, int /*data*/)
 {
 /*    FM_Write(0, reg);
     FM_Write(1, data);*/
 }
 
-void FM_Write(int offset, int data)
+void FM_Write(int /*offset*/, int /*data*/)
 {
 /*    if(offset & 1)
         fm_context.reg[ fm_context.latch ] = data;
@@ -104,12 +104,12 @@ void FM_Write(int offset, int data)
 }
 
 
-void FM_GetContext(uint8 *data)
+void FM_GetContext(uint8 */*data*/)
 {
 //    memcpy(data, &fm_context, sizeof(FM_Context));
 }
 
-void FM_SetContext(uint8 *data)
+void FM_SetContext(uint8 */*data*/)
 {
 /*
 	int i;
diff --git a/src/burn/drv/sms/smspio.cpp b/src/burn/drv/sms/smspio.cpp
index 06bbc35b5..80640e715 100644
--- a/src/burn/drv/sms/smspio.cpp
+++ b/src/burn/drv/sms/smspio.cpp
@@ -220,7 +220,7 @@ uint8 sio_r(int offset)
     }
 
     /* Just to please compiler */
-    return -1;
+    return 0;
 }
 
 void sio_w(int offset, int data)
diff --git a/src/burn/drv/sms/smstms.cpp b/src/burn/drv/sms/smstms.cpp
index b6f1cc4e8..f12e09b5c 100644
--- a/src/burn/drv/sms/smstms.cpp
+++ b/src/burn/drv/sms/smstms.cpp
@@ -102,7 +102,7 @@ parse_end:
     vdp.status = (vdp.status & 0xE0) | (i & 0x1F);
 }
 
-void render_obj_tms(int line)
+void render_obj_tms(int /*line*/)
 {
     int i, x = 0;
     int size, start, end, mode;
@@ -442,7 +442,7 @@ void render_bg_m1x(int line)
 }
 
 /* Invalid (2+3/1+2+3) */
-void render_bg_inv(int line)
+void render_bg_inv(int /*line*/)
 {
     int column;
     uint8 *clut;
diff --git a/src/burn/drv/sms/smsvdp.cpp b/src/burn/drv/sms/smsvdp.cpp
index 2503578cf..19e211b6f 100644
--- a/src/burn/drv/sms/smsvdp.cpp
+++ b/src/burn/drv/sms/smsvdp.cpp
@@ -325,7 +325,7 @@ uint8 vdp_read(int offset)
     }
 
     /* Just to please the compiler */
-    return -1;
+    return 0;
 }
 
 uint8 vdp_counter_r(int offset)
@@ -343,7 +343,7 @@ uint8 vdp_counter_r(int offset)
     }
 
     /* Just to please the compiler */
-    return -1;
+    return 0;
 }
 
 
diff --git a/src/burn/snd/sn76496.cpp b/src/burn/snd/sn76496.cpp
index ad5ba6809..978595f3d 100644
--- a/src/burn/snd/sn76496.cpp
+++ b/src/burn/snd/sn76496.cpp
@@ -68,7 +68,7 @@ void SN76496Update(INT32 Num, INT16* pSoundBuf, INT32 Length)
 	while (Length > 0)
 	{
 		INT32 Vol[4];
-		UINT32 Out, Out2;
+		UINT32 Out, Out2 = 0;
 		INT32 Left;