diff --git a/src/emu/cpu/tms32025/32025dsm.c b/src/emu/cpu/tms32025/32025dsm.c
index 9388bf0a9d9..c49d2611954 100644
--- a/src/emu/cpu/tms32025/32025dsm.c
+++ b/src/emu/cpu/tms32025/32025dsm.c
@@ -388,7 +388,7 @@ static void InitDasm32025(void)
 CPU_DISASSEMBLE( tms32025 )
 {
 	UINT32 flags = 0;
-	int a, b, c, d, k, m, n, p, r, s, t, w, x;	/* these can all be filled in by parsing an instruction */
+	int a, b, c, d, k, m, n, p, r, s, t, w;	/* these can all be filled in by parsing an instruction */
 	int i;
 	int op;
 	int cnt = 1;
@@ -433,7 +433,7 @@ CPU_DISASSEMBLE( tms32025 )
 
 	/* shift out operands */
 	cp = Op[op].parse;
-	a = b = c = d = k = m = n = p = r = s = t = w = x = 0;
+	a = b = c = d = k = m = n = p = r = s = t = w = 0;
 
 	while (bit >= 0)
 	{
diff --git a/src/emu/sound/ymf271.c b/src/emu/sound/ymf271.c
index c5c15f2080f..f26cff955a4 100644
--- a/src/emu/sound/ymf271.c
+++ b/src/emu/sound/ymf271.c
@@ -1221,13 +1221,13 @@ static void write_register(YMF271Chip *chip, int slotnum, int reg, int data)
 static void ymf271_write_fm(YMF271Chip *chip, int grp, int adr, int data)
 {
 	int reg;
-	int slotnum;
+	//int slotnum;
 	int slot_group;
 	int sync_mode, sync_reg;
 	//YMF271Slot *slot;
 
-	slotnum = 12*grp;
-	slotnum += fm_tab[adr & 0xf];
+	//slotnum = 12*grp;
+	//slotnum += fm_tab[adr & 0xf];
 	//slot = &chip->slots[slotnum];
 	slot_group = fm_tab[adr & 0xf];
 
diff --git a/src/mame/audio/turbo.c b/src/mame/audio/turbo.c
index 9b32b270a83..8b2279fa5f5 100644
--- a/src/mame/audio/turbo.c
+++ b/src/mame/audio/turbo.c
@@ -75,7 +75,9 @@ WRITE8_DEVICE_HANDLER( turbo_sound_a_w )
 	samples_device *samples = device->machine().device<samples_device>("samples");
 #endif
 	turbo_state *state = device->machine().driver_data<turbo_state>();
+#if (!DISCRETE_TEST)
 	UINT8 diff = data ^ state->m_sound_state[0];
+#endif
 	state->m_sound_state[0] = data;
 
 #if (!DISCRETE_TEST)
diff --git a/src/mame/video/midzeus.c b/src/mame/video/midzeus.c
index 6be9418b542..fd0f7ddfe37 100644
--- a/src/mame/video/midzeus.c
+++ b/src/mame/video/midzeus.c
@@ -1288,7 +1288,7 @@ static void render_poly_texture(void *dest, INT32 scanline, const poly_extent *e
 	INT32 curz = extent->param[0].start;
 	INT32 curu = extent->param[1].start;
 	INT32 curv = extent->param[2].start;
-	INT32 curi = extent->param[3].start;
+	//INT32 curi = extent->param[3].start;
 	INT32 dzdx = extent->param[0].dpdx;
 	INT32 dudx = extent->param[1].dpdx;
 	INT32 dvdx = extent->param[2].dpdx;
@@ -1334,7 +1334,7 @@ static void render_poly_texture(void *dest, INT32 scanline, const poly_extent *e
 		curz += dzdx;
 		curu += dudx;
 		curv += dvdx;
-		curi += didx;
+		//curi += didx;
 	}
 }