diff --git a/src/mame/video/pc080sn.c b/src/mame/video/pc080sn.c
index 077b17dd1ec..8c5d969d9c6 100644
--- a/src/mame/video/pc080sn.c
+++ b/src/mame/video/pc080sn.c
@@ -377,10 +377,9 @@ void pc080sn_device::topspeed_custom_draw( screen_device &screen, bitmap_ind16 &
 
 	UINT16 a, color;
 	int sx, x_index;
-	int i, y, y_index, src_y_index, row_index;
+	int y_index, src_y_index, row_index;
 
 	int flip = 0;
-	int machine_flip = 0;   /* for  ROT 180 ? */
 
 	int min_x = cliprect.min_x;
 	int max_x = cliprect.max_x;
@@ -400,12 +399,7 @@ void pc080sn_device::topspeed_custom_draw( screen_device &screen, bitmap_ind16 &
 		y_index = 0;
 	}
 
-	if (!machine_flip)
-		y = min_y;
-	else
-		y = max_y;
-
-	do
+	for (int y = min_y; y <= max_y; y++)
 	{
 		src_y_index = y_index & 0x1ff;  /* tilemaps are 512 px up/down */
 		row_index = (src_y_index - m_bgscrolly[layer]) & 0x1ff;
@@ -419,7 +413,7 @@ void pc080sn_device::topspeed_custom_draw( screen_device &screen, bitmap_ind16 &
 
 		if (flags & TILEMAP_DRAW_OPAQUE)
 		{
-			for (i = 0; i < screen_width; i++)
+			for (int i = 0; i < screen_width; i++)
 			{
 				a = src16[x_index & width_mask];
 #ifdef TOPSPEED_ROAD_COLORS
@@ -431,7 +425,7 @@ void pc080sn_device::topspeed_custom_draw( screen_device &screen, bitmap_ind16 &
 		}
 		else
 		{
-			for (i = 0; i < screen_width; i++)
+			for (int i = 0; i < screen_width; i++)
 			{
 				if (tsrc[x_index & width_mask])
 				{
@@ -449,13 +443,7 @@ void pc080sn_device::topspeed_custom_draw( screen_device &screen, bitmap_ind16 &
 
 		taitoic_drawscanline(bitmap, cliprect, 0, y, scanline, (flags & TILEMAP_DRAW_OPAQUE) ? 0 : 1, ROT0, screen.priority(), priority);
 		y_index++;
-
-		if (!machine_flip)
-			y++;
-		else
-			y--;
 	}
-	while ((!machine_flip && y <= max_y) || (machine_flip && y >= min_y));
 }
 
 void pc080sn_device::tilemap_draw( screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect, int layer, int flags, UINT32 priority )
diff --git a/src/mame/video/tc0080vco.c b/src/mame/video/tc0080vco.c
index 9083f894f9b..dca7dd0657c 100644
--- a/src/mame/video/tc0080vco.c
+++ b/src/mame/video/tc0080vco.c
@@ -439,11 +439,10 @@ void tc0080vco_device::bg0_tilemap_draw( screen_device &screen, bitmap_ind16 &bi
 
 		int sx, zoomx, zoomy;
 		int dx, ex, dy, ey;
-		int i, y, y_index, src_y_index, row_index;
+		int y_index, src_y_index, row_index;
 		int x_index, x_step;
 
 		int flip = m_flipscreen;
-		int machine_flip = 0;   /* for  ROT 180 ? */
 
 		int min_x = cliprect.min_x;
 		int max_x = cliprect.max_x;
@@ -501,12 +500,7 @@ void tc0080vco_device::bg0_tilemap_draw( screen_device &screen, bitmap_ind16 &bi
 			y_index = ((-m_scroll_ram[3] - 2) << 16) + min_y * zoomy - (max_y + min_y) * (zoomy - 0x10000);
 		}
 
-		if (!machine_flip)
-			y = min_y;
-		else
-			y = max_y;
-
-		do
+		for (int y = min_y; y <= max_y; y++)
 		{
 			src_y_index = (y_index >> 16) & 0x3ff;  /* tilemaps are 1024 px up/down */
 
@@ -525,7 +519,7 @@ void tc0080vco_device::bg0_tilemap_draw( screen_device &screen, bitmap_ind16 &bi
 
 			if (flags & TILEMAP_DRAW_OPAQUE)
 			{
-				for (i = 0; i < screen_width; i++)
+				for (int i = 0; i < screen_width; i++)
 				{
 					*dst16++ = src16[(x_index >> 16) & width_mask];
 					x_index += x_step;
@@ -533,7 +527,7 @@ void tc0080vco_device::bg0_tilemap_draw( screen_device &screen, bitmap_ind16 &bi
 			}
 			else
 			{
-				for (i = 0; i < screen_width; i++)
+				for (int i = 0; i < screen_width; i++)
 				{
 					if (tsrc[(x_index >> 16) & width_mask])
 						*dst16++ = src16[(x_index >> 16) & width_mask];
@@ -546,13 +540,7 @@ void tc0080vco_device::bg0_tilemap_draw( screen_device &screen, bitmap_ind16 &bi
 			taitoic_drawscanline(bitmap, cliprect, 0, y, scanline, (flags & TILEMAP_DRAW_OPAQUE) ? 0 : 1 , ROT0, screen.priority(), priority);
 
 			y_index += zoomy;
-
-			if (!machine_flip)
-				y++;
-			else
-				y--;
 		}
-		while ((!machine_flip && y <= max_y) || (machine_flip && y >= min_y));
 	}
 }
 
diff --git a/src/mame/video/tc0480scp.c b/src/mame/video/tc0480scp.c
index e9f030e0e5e..0eacfe5a0ef 100644
--- a/src/mame/video/tc0480scp.c
+++ b/src/mame/video/tc0480scp.c
@@ -717,7 +717,7 @@ void tc0480scp_device::bg01_draw( screen_device &screen, bitmap_ind16 &bitmap, c
 		bitmap_ind16 &srcbitmap = m_tilemap[layer][m_dblwidth]->pixmap();
 		bitmap_ind8 &flagsbitmap = m_tilemap[layer][m_dblwidth]->flagsmap();
 		int flip = m_pri_reg & 0x40;
-		int i, y, y_index, src_y_index, row_index;
+		int y_index, src_y_index, row_index;
 		int x_index, x_step;
 
 		UINT16 screen_width = 512; //cliprect.width();
@@ -745,9 +745,7 @@ void tc0480scp_device::bg01_draw( screen_device &screen, bitmap_ind16 &bitmap, c
 			y_index -= (m_y_offset - min_y) * zoomy;
 		}
 
-		y = min_y;
-
-		do
+		for (int y = min_y; y <= max_y; y++)
 		{
 			src_y_index = (y_index >> 16) & 0x1ff;
 
@@ -766,7 +764,7 @@ void tc0480scp_device::bg01_draw( screen_device &screen, bitmap_ind16 &bitmap, c
 
 			if (flags & TILEMAP_DRAW_OPAQUE)
 			{
-				for (i = 0; i < screen_width; i++)
+				for (int i = 0; i < screen_width; i++)
 				{
 					*dst16++ = src16[(x_index >> 16) & width_mask];
 					x_index += x_step;
@@ -774,7 +772,7 @@ void tc0480scp_device::bg01_draw( screen_device &screen, bitmap_ind16 &bitmap, c
 			}
 			else
 			{
-				for (i = 0; i < screen_width; i++)
+				for (int i = 0; i < screen_width; i++)
 				{
 					if (tsrc[(x_index >> 16) & width_mask])
 						*dst16++ = src16[(x_index >> 16) & width_mask];
@@ -787,10 +785,7 @@ void tc0480scp_device::bg01_draw( screen_device &screen, bitmap_ind16 &bitmap, c
 			taitoic_drawscanline(bitmap, cliprect, 0, y, scanline, (flags & TILEMAP_DRAW_OPAQUE) ? 0 : 1, ROT0, screen.priority(), priority);
 
 			y_index += zoomy;
-			y++;
 		}
-		while (y <= max_y);
-
 	}
 }
 
@@ -838,7 +833,7 @@ void tc0480scp_device::bg23_draw(screen_device &screen, bitmap_ind16 &bitmap, co
 
 	UINT16 *dst16, *src16;
 	UINT8 *tsrc;
-	int i, y, y_index, src_y_index, row_index, row_zoom;
+	int y_index, src_y_index, row_index, row_zoom;
 	int sx, x_index, x_step;
 	UINT32 zoomx, zoomy;
 	UINT16 scanline[512];
@@ -876,9 +871,7 @@ void tc0480scp_device::bg23_draw(screen_device &screen, bitmap_ind16 &bitmap, co
 		y_index -= (m_y_offset - min_y) * zoomy;
 	}
 
-		y = min_y;
-
-	do
+	for (int y = min_y; y <= max_y; y++)
 	{
 		if (!flipscreen)
 			src_y_index = ((y_index>>16) + m_bgcolumn_ram[layer][(y - m_y_offset) & 0x1ff]) & 0x1ff;
@@ -917,7 +910,7 @@ void tc0480scp_device::bg23_draw(screen_device &screen, bitmap_ind16 &bitmap, co
 
 		if (flags & TILEMAP_DRAW_OPAQUE)
 		{
-			for (i = 0; i < screen_width; i++)
+			for (int i = 0; i < screen_width; i++)
 			{
 				*dst16++ = src16[(x_index >> 16) & width_mask];
 				x_index += x_step;
@@ -925,7 +918,7 @@ void tc0480scp_device::bg23_draw(screen_device &screen, bitmap_ind16 &bitmap, co
 		}
 		else
 		{
-			for (i = 0; i < screen_width; i++)
+			for (int i = 0; i < screen_width; i++)
 			{
 				if (tsrc[(x_index >> 16) & width_mask])
 					*dst16++ = src16[(x_index >> 16) & width_mask];
@@ -938,9 +931,7 @@ void tc0480scp_device::bg23_draw(screen_device &screen, bitmap_ind16 &bitmap, co
 		taitoic_drawscanline(bitmap, cliprect, 0, y, scanline, (flags & TILEMAP_DRAW_OPAQUE) ? 0 : 1, ROT0, screen.priority(), priority);
 
 		y_index += zoomy;
-		y++;
 	}
-	while (y<=max_y);
 }
 
 
diff --git a/src/mame/video/wgp.c b/src/mame/video/wgp.c
index 0bb5e3e5424..d9aa942eede 100644
--- a/src/mame/video/wgp.c
+++ b/src/mame/video/wgp.c
@@ -514,7 +514,7 @@ void wgp_state::wgp_piv_layer_draw( screen_device &screen, bitmap_ind16 &bitmap,
 
 	UINT16 *dst16,*src16;
 	UINT8 *tsrc;
-	int i, y, y_index, src_y_index, row_index, row_zoom;
+	int y_index, src_y_index, row_index, row_zoom;
 
 	/* I have a fairly strong feeling these should be UINT32's, x_index is
 	   falling through from max +ve to max -ve quite a lot in this routine */
@@ -524,7 +524,6 @@ void wgp_state::wgp_piv_layer_draw( screen_device &screen, bitmap_ind16 &bitmap,
 	UINT16 scanline[512];
 	UINT16 row_colbank, row_scroll;
 	int flipscreen = 0; /* n/a */
-	int machine_flip = 0;   /* for  ROT 180 ? */
 
 	UINT16 screen_width = cliprect.width();
 	UINT16 min_y = cliprect.min_y;
@@ -558,12 +557,7 @@ void wgp_state::wgp_piv_layer_draw( screen_device &screen, bitmap_ind16 &bitmap,
 		y_index = 0;
 	}
 
-	if (!machine_flip)
-		y = min_y;
-	else
-		y = max_y;
-
-	do
+	for (int y = min_y; y <= max_y; y++)
 	{
 		int a;
 
@@ -598,7 +592,7 @@ void wgp_state::wgp_piv_layer_draw( screen_device &screen, bitmap_ind16 &bitmap,
 
 		if (flags & TILEMAP_DRAW_OPAQUE)
 		{
-			for (i = 0; i < screen_width; i++)
+			for (int i = 0; i < screen_width; i++)
 			{
 				*dst16++ = src16[(x_index >> 16) & width_mask] + row_colbank;
 				x_index += x_step;
@@ -606,7 +600,7 @@ void wgp_state::wgp_piv_layer_draw( screen_device &screen, bitmap_ind16 &bitmap,
 		}
 		else
 		{
-			for (i = 0; i < screen_width; i++)
+			for (int i = 0; i < screen_width; i++)
 			{
 				if (tsrc[(x_index >> 16) & width_mask])
 					*dst16++ = src16[(x_index >> 16) & width_mask] + row_colbank;
@@ -619,10 +613,7 @@ void wgp_state::wgp_piv_layer_draw( screen_device &screen, bitmap_ind16 &bitmap,
 		bryan2_drawscanline(bitmap, 0, y, screen_width, scanline, (flags & TILEMAP_DRAW_OPAQUE) ? 0 : 1, ROT0, screen.priority(), priority);
 
 		y_index += zoomy;
-		if (!machine_flip) y++; else y--;
 	}
-	while ((!machine_flip && y <= max_y) || (machine_flip && y >= min_y));
-
 }