diff --git a/src/mame/drivers/crystal.cpp b/src/mame/drivers/crystal.cpp
index 2549ba3b0f4..100435c2912 100644
--- a/src/mame/drivers/crystal.cpp
+++ b/src/mame/drivers/crystal.cpp
@@ -703,8 +703,8 @@ UINT32 crystal_state::screen_update_crystal(screen_device &screen, bitmap_ind16
 		SetVidReg(space, 0x8e, GetVidReg(space, 0x8e) ^ 1);
 
 	srcline = (UINT16 *) Visible;
-	for (y = 0; y < 240; y++)
-		memcpy(&bitmap.pix16(y), &srcline[y * 512], width * 2);
+	for (y = 0; y < screen.height(); y++)
+		memcpy(&bitmap.pix16(y), &srcline[y * 1024], width * 2);
 
 	return 0;
 }
diff --git a/src/mame/video/vrender0.cpp b/src/mame/video/vrender0.cpp
index 972f83be535..1b968053882 100644
--- a/src/mame/video/vrender0.cpp
+++ b/src/mame/video/vrender0.cpp
@@ -296,7 +296,6 @@ TILENAME(bpp, t, a)\
 			else if (bpp == 8)\
 			{\
 				UINT8 Texel = Quad->u.Imageb[Offset];\
-				Texel = Quad->u.Imageb[Offset];\
 				Color = Quad->Pal[Texel];\
 			}\
 			else if (bpp == 16)\
@@ -485,7 +484,7 @@ int vr0video_device::vrender0_ProcessPacket(UINT32 PacketPtr, UINT16 *Dest, UINT
 	{
 		QuadInfo Quad;
 
-		Quad.Pitch = 512;
+		Quad.Pitch = 1024;
 
 //      assert(Endx >= Dx && Endy >= Dy);