diff --git a/higan/emulator/emulator.hpp b/higan/emulator/emulator.hpp
index fa5073cf..8d1b028f 100644
--- a/higan/emulator/emulator.hpp
+++ b/higan/emulator/emulator.hpp
@@ -12,7 +12,7 @@ using namespace nall;
 
 namespace Emulator {
   static const string Name    = "higan";
-  static const string Version = "104";
+  static const string Version = "104.01";
   static const string Author  = "byuu";
   static const string License = "GPLv3";
   static const string Website = "http://byuu.org/";
diff --git a/higan/ms/vdp/background.cpp b/higan/ms/vdp/background.cpp
index edbb9b6f..48c53863 100644
--- a/higan/ms/vdp/background.cpp
+++ b/higan/ms/vdp/background.cpp
@@ -48,6 +48,8 @@ auto VDP::Background::run() -> void {
   output.color.bit(1) = vdp.vram[patternAddress + 1].bit(index);
   output.color.bit(2) = vdp.vram[patternAddress + 2].bit(index);
   output.color.bit(3) = vdp.vram[patternAddress + 3].bit(index);
+
+  if(output.color == 0) output.priority = 0;
 }
 
 auto VDP::Background::power() -> void {
diff --git a/higan/ms/vdp/vdp.cpp b/higan/ms/vdp/vdp.cpp
index 051e2b31..ebf1f6d0 100644
--- a/higan/ms/vdp/vdp.cpp
+++ b/higan/ms/vdp/vdp.cpp
@@ -38,13 +38,14 @@ auto VDP::main() -> void {
       sprite.run();
       step(2);
 
-      uint12 color = palette(io.backdropColor);
-      if(background.output.color && (background.output.priority || !sprite.output.color)) {
-        color = palette(background.output.palette << 4 | background.output.color);
-      } else if(sprite.output.color) {
-        color = palette(16 | sprite.output.color);
+      uint12 color = palette(16 | io.backdropColor);
+      if(!io.leftClip || x >= 8) {
+        if(background.output.priority || !sprite.output.color) {
+          color = palette(background.output.palette << 4 | background.output.color);
+        } else if(sprite.output.color) {
+          color = palette(16 | sprite.output.color);
+        }
       }
-      if(x <= 7 && io.leftClip) color = palette(io.backdropColor);
       if(!io.displayEnable) color = 0;
       *screen++ = color;
     }
diff --git a/higan/sfc/cartridge/load.cpp b/higan/sfc/cartridge/load.cpp
index 8fd2acf7..a66ff00b 100644
--- a/higan/sfc/cartridge/load.cpp
+++ b/higan/sfc/cartridge/load.cpp
@@ -1,7 +1,7 @@
 auto Cartridge::loadCartridge(Markup::Node node) -> void {
   information.title.cartridge = node["information/title"].text();
   auto board = node["board"];
-  if(!region() || region() == "Auto") {
+  if(region() == "Auto") {
     if(board["region"].text() == "ntsc") information.region = "NTSC";
     if(board["region"].text() == "pal") information.region = "PAL";
   }
diff --git a/higan/target-tomoko/program/interface.cpp b/higan/target-tomoko/program/interface.cpp
index 2f7a3aaf..54245143 100644
--- a/higan/target-tomoko/program/interface.cpp
+++ b/higan/target-tomoko/program/interface.cpp
@@ -28,6 +28,7 @@ auto Program::load(uint id, string name, string type, string_vector options) ->
   if(mediumQueue) {
     auto entry = mediumQueue.takeLeft().split("|", 1L);
     location = entry.right();
+    if(entry.size() == 1) option = options(0);
     if(entry.size() == 2) option = entry.left();
   } else {
     BrowserDialog dialog;
diff --git a/icarus/heuristics/mega-drive.cpp b/icarus/heuristics/mega-drive.cpp
index 0072f88b..1c4559fb 100644
--- a/icarus/heuristics/mega-drive.cpp
+++ b/icarus/heuristics/mega-drive.cpp
@@ -25,13 +25,13 @@ MegaDriveCartridge::MegaDriveCartridge(string location, uint8_t* data, uint size
   ramTo |= data[0x01ba] <<  8;
   ramTo |= data[0x01bb] <<  0;
 
-  if(!(ramFrom & 1) && !(ramTo & 1)) ramMode = "lo";
-  if( (ramFrom & 1) &&  (ramTo & 1)) ramMode = "hi";
+  if(!(ramFrom & 1) && !(ramTo & 1)) ramMode = "hi";
+  if( (ramFrom & 1) &&  (ramTo & 1)) ramMode = "lo";
   if(!(ramFrom & 1) &&  (ramTo & 1)) ramMode = "word";
 
   uint32_t ramSize = ramTo - ramFrom + 1;
-  if(ramMode == "lo") ramSize = (ramTo >> 1) - (ramFrom >> 1) + 1;
   if(ramMode == "hi") ramSize = (ramTo >> 1) - (ramFrom >> 1) + 1;
+  if(ramMode == "lo") ramSize = (ramTo >> 1) - (ramFrom >> 1) + 1;
   if(ramMode == "word") ramSize = ramTo - ramFrom + 1;
   if(ramMode != "none") ramSize = bit::round(min(0x20000, ramSize));
 
diff --git a/nall/mosaic.hpp b/nall/mosaic.hpp
deleted file mode 100644
index ac6e6f2a..00000000
--- a/nall/mosaic.hpp
+++ /dev/null
@@ -1,5 +0,0 @@
-#pragma once
-
-#include <nall/mosaic/bitstream.hpp>
-#include <nall/mosaic/context.hpp>
-#include <nall/mosaic/parser.hpp>
diff --git a/nall/mosaic/bitstream.hpp b/nall/mosaic/bitstream.hpp
deleted file mode 100644
index d46e971c..00000000
--- a/nall/mosaic/bitstream.hpp
+++ /dev/null
@@ -1,48 +0,0 @@
-#pragma once
-
-namespace nall { namespace mosaic {
-
-struct bitstream {
-  ~bitstream() {
-    close();
-  }
-
-  auto read(uint64_t addr) const -> bool {
-    if(data == nullptr || (addr >> 3) >= size) return 0;
-    uint mask = endian == 0 ? (0x01 << (addr & 7)) : (0x80 >> (addr & 7));
-    return data[addr >> 3] & mask;
-  }
-
-  auto write(uint64_t addr, bool value) -> void {
-    if(data == nullptr || readonly == true || (addr >> 3) >= size) return;
-    uint mask = endian == 0 ? (0x01 << (addr & 7)) : (0x80 >> (addr & 7));
-    if(value == 0) data[addr >> 3] &= ~mask;
-    if(value == 1) data[addr >> 3] |=  mask;
-  }
-
-  auto open(const string& filename) -> bool {
-    readonly = false;
-    if(fp.open(filename, filemap::mode::readwrite) == false) {
-      readonly = true;
-      if(fp.open(filename, filemap::mode::read) == false) {
-        return false;
-      }
-    }
-    data = fp.data();
-    size = fp.size();
-    return true;
-  }
-
-  auto close() -> void {
-    fp.close();
-    data = nullptr;
-  }
-
-  filemap fp;
-  uint8_t* data = nullptr;
-  uint size = 0;
-  bool readonly = false;
-  bool endian = 1;
-};
-
-}}
diff --git a/nall/mosaic/context.hpp b/nall/mosaic/context.hpp
deleted file mode 100644
index ceb13422..00000000
--- a/nall/mosaic/context.hpp
+++ /dev/null
@@ -1,221 +0,0 @@
-#pragma once
-
-namespace nall { namespace mosaic {
-
-struct context {
-  context() {
-    reset();
-  }
-
-  auto objectWidth() const -> uint { return blockWidth * tileWidth * mosaicWidth + paddingWidth; }
-  auto objectHeight() const -> uint { return blockHeight * tileHeight * mosaicHeight + paddingHeight; }
-  auto objectSize() const -> uint {
-    uint size = blockStride * tileWidth * tileHeight * mosaicWidth * mosaicHeight
-              + blockOffset * tileHeight * mosaicWidth * mosaicHeight
-              + tileStride * mosaicWidth * mosaicHeight
-              + tileOffset * mosaicHeight;
-    return max(1u, size);
-  }
-
-  auto reset() -> void {
-    offset = 0;
-    width = 0;
-    height = 0;
-    count = 0;
-
-    endian = 1;
-    order = 0;
-    depth = 1;
-
-    blockWidth = 1;
-    blockHeight = 1;
-    blockStride = 0;
-    blockOffset = 0;
-    block.reset();
-
-    tileWidth = 1;
-    tileHeight = 1;
-    tileStride = 0;
-    tileOffset = 0;
-    tile.reset();
-
-    mosaicWidth = 1;
-    mosaicHeight = 1;
-    mosaicStride = 0;
-    mosaicOffset = 0;
-    mosaic.reset();
-
-    paddingWidth = 0;
-    paddingHeight = 0;
-    paddingColor = 0;
-    palette.reset();
-  }
-
-  auto eval(const string& expression) -> uint {
-    if(auto result = Eval::integer(expression)) return result();
-    return 0u;
-  }
-
-  auto eval(vector<uint>& buffer, const string& expression_) -> void {
-    string expression = expression_;
-    bool function = false;
-    for(auto& c : expression) {
-      if(c == '(') function = true;
-      if(c == ')') function = false;
-      if(c == ',' && function == true) c = ';';
-    }
-
-    auto list = expression.split(",");
-    for(auto& item : list) {
-      item.strip();
-      if(item.match("f(?*) ?*")) {
-        item.trimLeft("f(", 1L);
-        auto part = item.split(") ", 1L);
-        auto args = part[0].split(";", 3L).strip();
-
-        uint length = eval(args(0, "0"));
-        uint offset = eval(args(1, "0"));
-        uint stride = eval(args(2, "0"));
-        if(args.size() < 2) offset = buffer.size();
-        if(args.size() < 3) stride = 1;
-
-        for(uint n = 0; n < length; n++) {
-          string fn = part[1];
-          fn.replace("n", string{n});
-          fn.replace("o", string{offset});
-          fn.replace("p", string{buffer.size()});
-          buffer.resize(offset + 1);
-          buffer[offset] = eval(fn);
-          offset += stride;
-        }
-      } else if(item.match("base64*")) {
-        uint offset = 0;
-        item.trimLeft("base64", 1L);
-        if(item.match("(?*) *")) {
-          item.trimLeft("(", 1L);
-          auto part = item.split(") ", 1L);
-          offset = eval(part[0]);
-          item = part(1, "");
-        }
-        item.strip();
-        for(auto& c : item) {
-          if(c >= 'A' && c <= 'Z') buffer.append(offset + c - 'A' +  0);
-          if(c >= 'a' && c <= 'z') buffer.append(offset + c - 'a' + 26);
-          if(c >= '0' && c <= '9') buffer.append(offset + c - '0' + 52);
-          if(c == '-') buffer.append(offset + 62);
-          if(c == '_') buffer.append(offset + 63);
-        }
-      } else if(item.match("file *")) {
-        item.trimLeft("file ", 1L);
-        item.strip();
-        //...
-      } else if(item) {
-        buffer.append(eval(item));
-      }
-    }
-  }
-
-  auto parse(const string& data) -> void {
-    reset();
-
-    auto lines = data.split("\n");
-    for(auto& line : lines) {
-      auto part = line.split(":", 1L).strip();
-      if(part.size() != 2) continue;
-
-      if(part[0] == "offset") offset = eval(part[1]);
-      if(part[0] == "width") width = eval(part[1]);
-      if(part[0] == "height") height = eval(part[1]);
-      if(part[0] == "count") count = eval(part[1]);
-
-      if(part[0] == "endian") endian = eval(part[1]);
-      if(part[0] == "order") order = eval(part[1]);
-      if(part[0] == "depth") depth = eval(part[1]);
-
-      if(part[0] == "blockWidth") blockWidth = eval(part[1]);
-      if(part[0] == "blockHeight") blockHeight = eval(part[1]);
-      if(part[0] == "blockStride") blockStride = eval(part[1]);
-      if(part[0] == "blockOffset") blockOffset = eval(part[1]);
-      if(part[0] == "block") eval(block, part[1]);
-
-      if(part[0] == "tileWidth") tileWidth = eval(part[1]);
-      if(part[0] == "tileHeight") tileHeight = eval(part[1]);
-      if(part[0] == "tileStride") tileStride = eval(part[1]);
-      if(part[0] == "tileOffset") tileOffset = eval(part[1]);
-      if(part[0] == "tile") eval(tile, part[1]);
-
-      if(part[0] == "mosaicWidth") mosaicWidth = eval(part[1]);
-      if(part[0] == "mosaicHeight") mosaicHeight = eval(part[1]);
-      if(part[0] == "mosaicStride") mosaicStride = eval(part[1]);
-      if(part[0] == "mosaicOffset") mosaicOffset = eval(part[1]);
-      if(part[0] == "mosaic") eval(mosaic, part[1]);
-
-      if(part[0] == "paddingWidth") paddingWidth = eval(part[1]);
-      if(part[0] == "paddingHeight") paddingHeight = eval(part[1]);
-      if(part[0] == "paddingColor") paddingColor = eval(part[1]);
-      if(part[0] == "palette") eval(palette, part[1]);
-    }
-
-    sanitize();
-  }
-
-  auto load(const string& filename) -> bool {
-    if(auto filedata = string::read(filename)) {
-      parse(filedata);
-      return true;
-    }
-    return false;
-  }
-
-  auto sanitize() -> void {
-    if(depth < 1) depth = 1;
-    if(depth > 24) depth = 24;
-
-    if(blockWidth < 1) blockWidth = 1;
-    if(blockHeight < 1) blockHeight = 1;
-
-    if(tileWidth < 1) tileWidth = 1;
-    if(tileHeight < 1) tileHeight = 1;
-
-    if(mosaicWidth < 1) mosaicWidth = 1;
-    if(mosaicHeight < 1) mosaicHeight = 1;
-
-    //set alpha to full opacity
-    paddingColor |= 255u << 24;
-    for(auto& color : palette) color |= 255u << 24;
-  }
-
-  uint offset;
-  uint width;
-  uint height;
-  uint count;
-
-  bool endian;  //0 = lsb, 1 = msb
-  bool order;   //0 = linear, 1 = planar
-  uint depth;   //1 - 24bpp
-
-  uint blockWidth;
-  uint blockHeight;
-  uint blockStride;
-  uint blockOffset;
-  vector<uint> block;
-
-  uint tileWidth;
-  uint tileHeight;
-  uint tileStride;
-  uint tileOffset;
-  vector<uint> tile;
-
-  uint mosaicWidth;
-  uint mosaicHeight;
-  uint mosaicStride;
-  uint mosaicOffset;
-  vector<uint> mosaic;
-
-  uint paddingWidth;
-  uint paddingHeight;
-  uint paddingColor;
-  vector<uint> palette;
-};
-
-}}
diff --git a/nall/mosaic/parser.hpp b/nall/mosaic/parser.hpp
deleted file mode 100644
index 5d68cd83..00000000
--- a/nall/mosaic/parser.hpp
+++ /dev/null
@@ -1,119 +0,0 @@
-#pragma once
-
-namespace nall { namespace mosaic {
-
-struct parser {
-  //export from bitstream to canvas
-  auto load(bitstream& stream, uint64_t offset, context& ctx, uint width, uint height) -> void {
-    canvas.allocate(width, height);
-    canvas.fill(ctx.paddingColor);
-    parse(1, stream, offset, ctx, width, height);
-  }
-
-  //import from canvas to bitstream
-  auto save(bitstream& stream, uint64_t offset, context& ctx) -> bool {
-    if(stream.readonly) return false;
-    parse(0, stream, offset, ctx, canvas.width(), canvas.height());
-    return true;
-  }
-
-private:
-  auto read(uint x, uint y) const -> uint32_t {
-    uint addr = y * canvas.width() + x;
-    if(addr >= canvas.width() * canvas.height()) return 0u;
-    auto buffer = (uint32_t*)canvas.data();
-    return buffer[addr];
-  }
-
-  auto write(uint x, uint y, uint32_t data) -> void {
-    uint addr = y * canvas.width() + x;
-    if(addr >= canvas.width() * canvas.height()) return;
-    auto buffer = (uint32_t*)canvas.data();
-    buffer[addr] = data;
-  }
-
-  auto parse(bool load, bitstream& stream, uint64_t offset, context& ctx, uint width, uint height) -> void {
-    stream.endian = ctx.endian;
-    uint canvasWidth = width / (ctx.mosaicWidth * ctx.tileWidth * ctx.blockWidth + ctx.paddingWidth);
-    uint canvasHeight = height / (ctx.mosaicHeight * ctx.tileHeight * ctx.blockHeight + ctx.paddingHeight);
-    uint bitsPerBlock = ctx.depth * ctx.blockWidth * ctx.blockHeight;
-
-    uint objectOffset = 0;
-    for(uint objectY = 0; objectY < canvasHeight; objectY++) {
-      for(uint objectX = 0; objectX < canvasWidth; objectX++) {
-        if(objectOffset >= ctx.count && ctx.count > 0) break;
-        uint objectIX = objectX * ctx.objectWidth();
-        uint objectIY = objectY * ctx.objectHeight();
-        objectOffset++;
-
-        uint mosaicOffset = 0;
-        for(uint mosaicY = 0; mosaicY < ctx.mosaicHeight; mosaicY++) {
-          for(uint mosaicX = 0; mosaicX < ctx.mosaicWidth; mosaicX++) {
-            uint mosaicData = ctx.mosaic(mosaicOffset, mosaicOffset);
-            uint mosaicIX = (mosaicData % ctx.mosaicWidth) * (ctx.tileWidth * ctx.blockWidth);
-            uint mosaicIY = (mosaicData / ctx.mosaicWidth) * (ctx.tileHeight * ctx.blockHeight);
-            mosaicOffset++;
-
-            uint tileOffset = 0;
-            for(uint tileY = 0; tileY < ctx.tileHeight; tileY++) {
-              for(uint tileX = 0; tileX < ctx.tileWidth; tileX++) {
-                uint tileData = ctx.tile(tileOffset, tileOffset);
-                uint tileIX = (tileData % ctx.tileWidth) * ctx.blockWidth;
-                uint tileIY = (tileData / ctx.tileWidth) * ctx.blockHeight;
-                tileOffset++;
-
-                uint blockOffset = 0;
-                for(uint blockY = 0; blockY < ctx.blockHeight; blockY++) {
-                  for(uint blockX = 0; blockX < ctx.blockWidth; blockX++) {
-                    if(load) {
-                      uint palette = 0;
-                      for(uint n = 0; n < ctx.depth; n++) {
-                        uint index = blockOffset++;
-                        if(ctx.order == 1) index = (index % ctx.depth) * ctx.blockWidth * ctx.blockHeight + (index / ctx.depth);
-                        palette |= stream.read(offset + ctx.block(index, index)) << n;
-                      }
-
-                      write(
-                        objectIX + mosaicIX + tileIX + blockX,
-                        objectIY + mosaicIY + tileIY + blockY,
-                        ctx.palette(palette, palette)
-                      );
-                    } else /* save */ {
-                      uint32_t palette = read(
-                        objectIX + mosaicIX + tileIX + blockX,
-                        objectIY + mosaicIY + tileIY + blockY
-                      );
-
-                      for(uint n = 0; n < ctx.depth; n++) {
-                        uint index = blockOffset++;
-                        if(ctx.order == 1) index = (index % ctx.depth) * ctx.blockWidth * ctx.blockHeight + (index / ctx.depth);
-                        stream.write(offset + ctx.block(index, index), palette & 1);
-                        palette >>= 1;
-                      }
-                    }
-                  }  //blockX
-                }  //blockY
-
-                offset += ctx.blockStride;
-              }  //tileX
-
-              offset += ctx.blockOffset;
-            }  //tileY
-
-            offset += ctx.tileStride;
-          }  //mosaicX
-
-          offset += ctx.tileOffset;
-        }  //mosaicY
-
-        offset += ctx.mosaicStride;
-      }  //objectX
-
-      offset += ctx.mosaicOffset;
-    }  //objectY
-  }
-
-  image canvas;
-};
-
-}}