diff --git a/higan/emulator/emulator.hpp b/higan/emulator/emulator.hpp
index 00cbf2c3..f6be2504 100755
--- a/higan/emulator/emulator.hpp
+++ b/higan/emulator/emulator.hpp
@@ -3,7 +3,7 @@
 
 namespace Emulator {
   static const char Name[] = "higan";
-  static const char Version[] = "092.01";
+  static const char Version[] = "092.02";
   static const char Author[] = "byuu";
   static const char License[] = "GPLv3";
 }
diff --git a/higan/sfc/Makefile b/higan/sfc/Makefile
index 2bc987e6..f18b65ab 100755
--- a/higan/sfc/Makefile
+++ b/higan/sfc/Makefile
@@ -1,13 +1,14 @@
 sfc_objects := sfc-interface sfc-system sfc-controller
 sfc_objects += sfc-cartridge sfc-cheat
 sfc_objects += sfc-memory sfc-cpu sfc-smp sfc-dsp sfc-ppu
+sfc_objects += sfc-satellaviewbase
 sfc_objects += sfc-icd2 sfc-bsx sfc-nss sfc-event
 sfc_objects += sfc-sa1 sfc-superfx
 sfc_objects += sfc-armdsp sfc-hitachidsp sfc-necdsp
 sfc_objects += sfc-epsonrtc sfc-sharprtc
 sfc_objects += sfc-spc7110 sfc-sdd1 sfc-obc1
 sfc_objects += sfc-hsu1 sfc-msu1
-sfc_objects += sfc-satellaview sfc-sufamiturbo
+sfc_objects += sfc-satellaviewcart sfc-sufamiturbo
 objects += $(sfc_objects)
 
 ifeq ($(profile),accuracy)
@@ -32,38 +33,40 @@ else
   $(error unknown profile.)
 endif
 
-obj/sfc-interface.o:   $(sfc)/interface/interface.cpp $(call rwildcard,$(sfc)/interface)
-obj/sfc-system.o:      $(sfc)/system/system.cpp $(call rwildcard,$(sfc)/system/)
-obj/sfc-controller.o:  $(sfc)/controller/controller.cpp $(call rwildcard,$(sfc)/controller/)
-obj/sfc-cartridge.o:   $(sfc)/cartridge/cartridge.cpp $(sfc)/cartridge/*
-obj/sfc-cheat.o:       $(sfc)/cheat/cheat.cpp $(sfc)/cheat/*
-obj/sfc-memory.o:      $(sfc)/memory/memory.cpp $(call rwildcard,$(sfc)/memory/)
-obj/sfc-cpu.o:         $(sfccpu)/cpu.cpp $(call rwildcard,$(sfccpu)/)
-obj/sfc-smp.o:         $(sfcsmp)/smp.cpp $(call rwildcard,$(sfcsmp)/)
-obj/sfc-dsp.o:         $(sfcdsp)/dsp.cpp $(call rwildcard,$(sfcdsp)/)
-obj/sfc-ppu.o:         $(sfcppu)/ppu.cpp $(call rwildcard,$(sfcppu)/)
+obj/sfc-interface.o:       $(sfc)/interface/interface.cpp $(call rwildcard,$(sfc)/interface)
+obj/sfc-system.o:          $(sfc)/system/system.cpp $(call rwildcard,$(sfc)/system/)
+obj/sfc-controller.o:      $(sfc)/controller/controller.cpp $(call rwildcard,$(sfc)/controller/)
+obj/sfc-cartridge.o:       $(sfc)/cartridge/cartridge.cpp $(sfc)/cartridge/*
+obj/sfc-cheat.o:           $(sfc)/cheat/cheat.cpp $(sfc)/cheat/*
+obj/sfc-memory.o:          $(sfc)/memory/memory.cpp $(call rwildcard,$(sfc)/memory/)
+obj/sfc-cpu.o:             $(sfccpu)/cpu.cpp $(call rwildcard,$(sfccpu)/)
+obj/sfc-smp.o:             $(sfcsmp)/smp.cpp $(call rwildcard,$(sfcsmp)/)
+obj/sfc-dsp.o:             $(sfcdsp)/dsp.cpp $(call rwildcard,$(sfcdsp)/)
+obj/sfc-ppu.o:             $(sfcppu)/ppu.cpp $(call rwildcard,$(sfcppu)/)
 
-obj/sfc-icd2.o:        $(sfc)/chip/icd2/icd2.cpp $(call rwildcard,$(sfc)/chip/icd2/)
-obj/sfc-bsx.o:         $(sfc)/chip/bsx/bsx.cpp $(call rwildcard,$(sfc)/chip/bsx/)
-obj/sfc-nss.o:         $(sfc)/chip/nss/nss.cpp $(call rwildcard,$(sfc)/chip/nss/)
-obj/sfc-event.o:       $(sfc)/chip/event/event.cpp $(call rwildcard,$(sfc)/chip/event/)
+obj/sfc-satellaviewbase.o: $(sfc)/base/satellaview/satellaview.cpp $(call rwildcard,$(sfc)/base/satellaview/)
 
-obj/sfc-sa1.o:         $(sfc)/chip/sa1/sa1.cpp $(call rwildcard,$(sfc)/chip/sa1/)
-obj/sfc-superfx.o:     $(sfc)/chip/superfx/superfx.cpp $(call rwildcard,$(sfc)/chip/superfx/)
+obj/sfc-icd2.o:            $(sfc)/chip/icd2/icd2.cpp $(call rwildcard,$(sfc)/chip/icd2/)
+obj/sfc-bsx.o:             $(sfc)/chip/bsx/bsx.cpp $(call rwildcard,$(sfc)/chip/bsx/)
+obj/sfc-nss.o:             $(sfc)/chip/nss/nss.cpp $(call rwildcard,$(sfc)/chip/nss/)
+obj/sfc-event.o:           $(sfc)/chip/event/event.cpp $(call rwildcard,$(sfc)/chip/event/)
 
-obj/sfc-armdsp.o:      $(sfc)/chip/armdsp/armdsp.cpp $(call rwildcard,$(sfc)/chip/armdsp/)
-obj/sfc-hitachidsp.o:  $(sfc)/chip/hitachidsp/hitachidsp.cpp $(call rwildcard,$(sfc)/chip/hitachidsp/)
-obj/sfc-necdsp.o:      $(sfc)/chip/necdsp/necdsp.cpp $(call rwildcard,$(sfc)/chip/necdsp/)
+obj/sfc-sa1.o:             $(sfc)/chip/sa1/sa1.cpp $(call rwildcard,$(sfc)/chip/sa1/)
+obj/sfc-superfx.o:         $(sfc)/chip/superfx/superfx.cpp $(call rwildcard,$(sfc)/chip/superfx/)
 
-obj/sfc-epsonrtc.o:    $(sfc)/chip/epsonrtc/epsonrtc.cpp $(call rwildcard,$(sfc)/chip/epsonrtc/)
-obj/sfc-sharprtc.o:    $(sfc)/chip/sharprtc/sharprtc.cpp $(call rwildcard,$(sfc)/chip/sharprtc/)
+obj/sfc-armdsp.o:          $(sfc)/chip/armdsp/armdsp.cpp $(call rwildcard,$(sfc)/chip/armdsp/)
+obj/sfc-hitachidsp.o:      $(sfc)/chip/hitachidsp/hitachidsp.cpp $(call rwildcard,$(sfc)/chip/hitachidsp/)
+obj/sfc-necdsp.o:          $(sfc)/chip/necdsp/necdsp.cpp $(call rwildcard,$(sfc)/chip/necdsp/)
 
-obj/sfc-spc7110.o:     $(sfc)/chip/spc7110/spc7110.cpp $(sfc)/chip/spc7110/*
-obj/sfc-sdd1.o:        $(sfc)/chip/sdd1/sdd1.cpp $(sfc)/chip/sdd1/*
-obj/sfc-obc1.o:        $(sfc)/chip/obc1/obc1.cpp $(sfc)/chip/obc1/*
+obj/sfc-epsonrtc.o:        $(sfc)/chip/epsonrtc/epsonrtc.cpp $(call rwildcard,$(sfc)/chip/epsonrtc/)
+obj/sfc-sharprtc.o:        $(sfc)/chip/sharprtc/sharprtc.cpp $(call rwildcard,$(sfc)/chip/sharprtc/)
 
-obj/sfc-hsu1.o:        $(sfc)/chip/hsu1/hsu1.cpp $(sfc)/chip/hsu1/*
-obj/sfc-msu1.o:        $(sfc)/chip/msu1/msu1.cpp $(sfc)/chip/msu1/*
+obj/sfc-spc7110.o:         $(sfc)/chip/spc7110/spc7110.cpp $(sfc)/chip/spc7110/*
+obj/sfc-sdd1.o:            $(sfc)/chip/sdd1/sdd1.cpp $(sfc)/chip/sdd1/*
+obj/sfc-obc1.o:            $(sfc)/chip/obc1/obc1.cpp $(sfc)/chip/obc1/*
 
-obj/sfc-satellaview.o: $(sfc)/slot/satellaview/satellaview.cpp $(call rwildcard,$(sfc)/slot/satellaview/)
-obj/sfc-sufamiturbo.o: $(sfc)/slot/sufamiturbo/sufamiturbo.cpp $(call rwildcard,$(sfc)/slot/sufamiturbo/)
+obj/sfc-hsu1.o:            $(sfc)/chip/hsu1/hsu1.cpp $(sfc)/chip/hsu1/*
+obj/sfc-msu1.o:            $(sfc)/chip/msu1/msu1.cpp $(sfc)/chip/msu1/*
+
+obj/sfc-satellaviewcart.o: $(sfc)/slot/satellaview/satellaview.cpp $(call rwildcard,$(sfc)/slot/satellaview/)
+obj/sfc-sufamiturbo.o:     $(sfc)/slot/sufamiturbo/sufamiturbo.cpp $(call rwildcard,$(sfc)/slot/sufamiturbo/)
diff --git a/higan/sfc/base/base.hpp b/higan/sfc/base/base.hpp
new file mode 100644
index 00000000..e0cd5ee4
--- /dev/null
+++ b/higan/sfc/base/base.hpp
@@ -0,0 +1 @@
+#include <sfc/base/satellaview/satellaview.hpp>
diff --git a/higan/sfc/chip/bsx/satellaview/satellaview.cpp b/higan/sfc/base/satellaview/satellaview.cpp
old mode 100755
new mode 100644
similarity index 77%
rename from higan/sfc/chip/bsx/satellaview/satellaview.cpp
rename to higan/sfc/base/satellaview/satellaview.cpp
index d988657b..236b8ee4
--- a/higan/sfc/chip/bsx/satellaview/satellaview.cpp
+++ b/higan/sfc/base/satellaview/satellaview.cpp
@@ -1,26 +1,37 @@
-#ifdef BSX_CPP
+#include <sfc/sfc.hpp>
 
-BSXSatellaview bsxsatellaview;
+#define SATELLAVIEW_BASE_UNIT_CPP
+namespace SuperFamicom {
 
-void BSXSatellaview::init() {
+SatellaviewBaseUnit satellaviewbaseunit;
+
+void SatellaviewBaseUnit::init() {
 }
 
-void BSXSatellaview::load() {
-  bus.map({&BSXSatellaview::mmio_read, &bsxsatellaview}, {&BSXSatellaview::mmio_write, &bsxsatellaview}, 0x00, 0x3f, 0x2188, 0x219f);
-  bus.map({&BSXSatellaview::mmio_read, &bsxsatellaview}, {&BSXSatellaview::mmio_write, &bsxsatellaview}, 0x80, 0xbf, 0x2188, 0x219f);
+void SatellaviewBaseUnit::load() {
+  bus.map(
+    {&SatellaviewBaseUnit::read, &satellaviewbaseunit},
+    {&SatellaviewBaseUnit::write, &satellaviewbaseunit},
+    0x00, 0x3f, 0x2188, 0x219f
+  );
+  bus.map(
+    {&SatellaviewBaseUnit::read, &satellaviewbaseunit},
+    {&SatellaviewBaseUnit::write, &satellaviewbaseunit},
+    0x80, 0xbf, 0x2188, 0x219f
+  );
 }
 
-void BSXSatellaview::unload() {
+void SatellaviewBaseUnit::unload() {
 }
 
-void BSXSatellaview::power() {
+void SatellaviewBaseUnit::power() {
 }
 
-void BSXSatellaview::reset() {
+void SatellaviewBaseUnit::reset() {
   memset(&regs, 0x00, sizeof regs);
 }
 
-uint8 BSXSatellaview::mmio_read(unsigned addr) {
+uint8 SatellaviewBaseUnit::read(unsigned addr) {
   addr &= 0xffff;
 
   switch(addr) {
@@ -78,7 +89,7 @@ uint8 BSXSatellaview::mmio_read(unsigned addr) {
   return cpu.regs.mdr;
 }
 
-void BSXSatellaview::mmio_write(unsigned addr, uint8 data) {
+void SatellaviewBaseUnit::write(unsigned addr, uint8 data) {
   addr &= 0xffff;
 
   switch(addr) {
@@ -139,4 +150,4 @@ void BSXSatellaview::mmio_write(unsigned addr, uint8 data) {
   }
 }
 
-#endif
+}
diff --git a/higan/sfc/chip/bsx/satellaview/satellaview.hpp b/higan/sfc/base/satellaview/satellaview.hpp
old mode 100755
new mode 100644
similarity index 72%
rename from higan/sfc/chip/bsx/satellaview/satellaview.hpp
rename to higan/sfc/base/satellaview/satellaview.hpp
index 56caf0b7..2fb7ddde
--- a/higan/sfc/chip/bsx/satellaview/satellaview.hpp
+++ b/higan/sfc/base/satellaview/satellaview.hpp
@@ -1,12 +1,12 @@
-struct BSXSatellaview {
+struct SatellaviewBaseUnit : Memory {
   void init();
   void load();
   void unload();
   void power();
   void reset();
 
-  uint8 mmio_read(unsigned addr);
-  void mmio_write(unsigned addr, uint8 data);
+  uint8 read(unsigned addr);
+  void write(unsigned addr, uint8 data);
 
 private:
   struct {
@@ -22,4 +22,4 @@ private:
   } regs;
 };
 
-extern BSXSatellaview bsxsatellaview;
+extern SatellaviewBaseUnit satellaviewbaseunit;
diff --git a/higan/sfc/cartridge/cartridge.hpp b/higan/sfc/cartridge/cartridge.hpp
index 57ba483b..6a63482d 100755
--- a/higan/sfc/cartridge/cartridge.hpp
+++ b/higan/sfc/cartridge/cartridge.hpp
@@ -100,8 +100,8 @@ private:
   void parse_markup_cartridge(Markup::Node);
   void parse_markup_icd2(Markup::Node);
   void parse_markup_bsx(Markup::Node);
-  void parse_markup_bsxslot(Markup::Node);
-  void parse_markup_sufamiturbo(Markup::Node);
+  void parse_markup_satellaview(Markup::Node);
+  void parse_markup_sufamiturbo(Markup::Node, bool slot);
   void parse_markup_nss(Markup::Node);
   void parse_markup_event(Markup::Node);
   void parse_markup_sa1(Markup::Node);
diff --git a/higan/sfc/cartridge/markup.cpp b/higan/sfc/cartridge/markup.cpp
index b9518a15..9e904a61 100755
--- a/higan/sfc/cartridge/markup.cpp
+++ b/higan/sfc/cartridge/markup.cpp
@@ -11,8 +11,9 @@ void Cartridge::parse_markup(const char *markup) {
   parse_markup_cartridge(cartridge);
   parse_markup_icd2(cartridge["icd2"]);
   parse_markup_bsx(cartridge["bsx"]);
-  parse_markup_bsxslot(cartridge["bsxslot"]);
-  parse_markup_sufamiturbo(cartridge["sufamiturbo"]);
+  parse_markup_satellaview(cartridge["satellaview"]);
+  parse_markup_sufamiturbo(cartridge["sufamiturbo[0]"], 0);
+  parse_markup_sufamiturbo(cartridge["sufamiturbo[1]"], 1);
   parse_markup_nss(cartridge["nss"]);
   parse_markup_event(cartridge["event"]);
   parse_markup_sa1(cartridge["sa1"]);
@@ -125,15 +126,13 @@ void Cartridge::parse_markup_bsx(Markup::Node root) {
   }
 }
 
-void Cartridge::parse_markup_bsxslot(Markup::Node root) {
+void Cartridge::parse_markup_satellaview(Markup::Node root) {
   if(root.exists() == false) return;
   has_bs_slot = true;
 
   interface->loadRequest(ID::Satellaview, "BS-X Satellaview", "bs");
 
-  for(auto &node : root) {
-    if(node.name != "map") continue;
-
+  for(auto &node : root.find("map")) {
     if(node["id"].data == "rom") {
       if(satellaviewcartridge.memory.size() == 0) continue;
 
@@ -144,39 +143,34 @@ void Cartridge::parse_markup_bsxslot(Markup::Node root) {
   }
 }
 
-void Cartridge::parse_markup_sufamiturbo(Markup::Node root) {
+void Cartridge::parse_markup_sufamiturbo(Markup::Node root, bool slot) {
   if(root.exists() == false) return;
   has_st_slots = true;
 
-  //load required slot A (will request slot B if slot A cartridge is linkable)
-  interface->loadRequest(ID::SufamiTurboSlotA, "Sufami Turbo - Slot A", "st");
+  if(slot == 0) {
+    //load required slot A (will request slot B if slot A cartridge is linkable)
+    interface->loadRequest(ID::SufamiTurboSlotA, "Sufami Turbo - Slot A", "st");
+  }
 
-  for(auto &slot : root) {
-    if(slot.name != "slot") continue;
-    bool slotid = slot["id"].data == "A" ? 0 : slot["id"].data == "B" ? 1 : 0;
+  for(auto &node : root.find("map")) {
+    SufamiTurboCartridge &cart = (slot == 0 ? sufamiturboA : sufamiturboB);
 
-    for(auto &node : slot) {
-      if(node.name != "map") continue;
+    if(node["id"].data == "rom") {
+      if(cart.rom.size() == 0) continue;
 
-      if(node["id"].data == "rom") {
-        SuperFamicom::Memory &memory = slotid == 0 ? sufamiturboA.rom : sufamiturboB.rom;
-        if(memory.size() == 0) continue;
+      Mapping m(cart.rom);
+      parse_markup_map(m, node);
+      if(m.size == 0) m.size = cart.rom.size();
+      if(m.size) mapping.append(m);
+    }
 
-        Mapping m(memory);
-        parse_markup_map(m, node);
-        if(m.size == 0) m.size = memory.size();
-        if(m.size) mapping.append(m);
-      }
+    if(node["id"].data == "ram") {
+      if(cart.ram.size() == 0) continue;
 
-      if(node["id"].data == "ram") {
-        SuperFamicom::Memory &memory = slotid == 0 ? sufamiturboA.ram : sufamiturboB.ram;
-        if(memory.size() == 0) continue;
-
-        Mapping m(memory);
-        parse_markup_map(m, node);
-        if(m.size == 0) m.size = memory.size();
-        if(m.size) mapping.append(m);
-      }
+      Mapping m(cart.ram);
+      parse_markup_map(m, node);
+      if(m.size == 0) m.size = cart.ram.size();
+      if(m.size) mapping.append(m);
     }
   }
 }
diff --git a/higan/sfc/chip/bsx/bsx.cpp b/higan/sfc/chip/bsx/bsx.cpp
index bf0d9c03..b2381fc6 100755
--- a/higan/sfc/chip/bsx/bsx.cpp
+++ b/higan/sfc/chip/bsx/bsx.cpp
@@ -2,6 +2,145 @@
 
 #define BSX_CPP
 namespace SuperFamicom {
-  #include "satellaview/satellaview.cpp"
-  #include "cartridge/cartridge.cpp"
+
+#include "serialization.cpp"
+BSXCartridge bsxcartridge;
+
+void BSXCartridge::init() {
+}
+
+void BSXCartridge::load() {
+}
+
+void BSXCartridge::unload() {
+  rom.reset();
+  ram.reset();
+  psram.reset();
+}
+
+void BSXCartridge::power() {
+}
+
+void BSXCartridge::reset() {
+  for(unsigned i = 0; i < 16; i++) r[i] = 0x00;
+  r[0x07] = 0x80;
+  r[0x08] = 0x80;
+  mmio_commit();
+}
+
+uint8 BSXCartridge::memory_access(bool write, Memory &memory, unsigned addr, uint8 data) {
+  if(write == 0) return memory_read(memory, addr);
+  memory_write(memory, addr, data);
+}
+
+uint8 BSXCartridge::memory_read(Memory &memory, unsigned addr) {
+  addr = bus.mirror(addr, memory.size());
+  return memory.read(addr);
+}
+
+void BSXCartridge::memory_write(Memory &memory, unsigned addr, uint8 data) {
+  addr = bus.mirror(addr, memory.size());
+  return memory.write(addr, data);
+}
+
+//mcu_access() allows mcu_read() and mcu_write() to share decoding logic
+uint8 BSXCartridge::mcu_access(bool write, unsigned addr, uint8 data) {
+  if((addr & 0xe08000) == 0x008000) {  //$00-1f:8000-ffff
+    if(r07 == 1) {
+      addr = ((addr & 0x1f0000) >> 1) | (addr & 0x7fff);
+      return memory_access(write, rom, addr, data);
+    }
+  }
+
+  if((addr & 0xe08000) == 0x808000) {  //$80-9f:8000-ffff
+    if(r08 == 1) {
+      addr = ((addr & 0x1f0000) >> 1) | (addr & 0x7fff);
+      return memory_access(write, rom, addr, data);
+    }
+  }
+
+  if((addr & 0xe0e000) == 0x206000) {  //$20-3f:6000-7fff
+    return memory_access(write, psram, addr, data);
+  }
+
+  if((addr & 0xf00000) == 0x400000) {  //$40-4f:0000-ffff
+    if(r05 == 0) return memory_access(write, psram, addr & 0x0fffff, data);
+  }
+
+  if((addr & 0xf00000) == 0x500000) {  //$50-5f:0000-ffff
+    if(r06 == 0) return memory_access(write, psram, addr & 0x0fffff, data);
+  }
+
+  if((addr & 0xf00000) == 0x600000) {  //$60-6f:0000-ffff
+    if(r03 == 1) return memory_access(write, psram, addr & 0x0fffff, data);
+  }
+
+  if((addr & 0xf80000) == 0x700000) {  //$70-77:0000-ffff
+    return memory_access(write, psram, addr & 0x07ffff, data);
+  }
+
+  if(((addr & 0x408000) == 0x008000)  //$00-3f|80-bf:8000-ffff
+  || ((addr & 0x400000) == 0x400000)  //$40-7f|c0-ff:0000-ffff
+  ) {
+    if(r02 == 0) addr = ((addr & 0x7f0000) >> 1) | (addr & 0x7fff);
+    Memory &memory = (r01 == 0 ? (Memory&)satellaviewcartridge : (Memory&)psram);
+    return memory_access(write, memory, addr & 0x7fffff, data);
+  }
+
+  return cpu.regs.mdr;
+}
+
+uint8 BSXCartridge::mcu_read(unsigned addr) {
+  return mcu_access(0, addr);
+}
+
+void BSXCartridge::mcu_write(unsigned addr, uint8 data) {
+  mcu_access(1, addr, data);
+}
+
+uint8 BSXCartridge::mmio_read(unsigned addr) {
+  if((addr & 0xf0ffff) == 0x005000) {  //$00-0f:5000
+    uint8 n = (addr >> 16) & 15;
+    return r[n];
+  }
+
+  if((addr & 0xf8f000) == 0x105000) {  //$10-17:5000-5fff
+    return memory_read(ram, ((addr >> 16) & 7) * 0x1000 + (addr & 0xfff));
+  }
+
+  return 0x00;
+}
+
+void BSXCartridge::mmio_write(unsigned addr, uint8 data) {
+  if((addr & 0xf0ffff) == 0x005000) {  //$00-0f:5000
+    uint8 n = (addr >> 16) & 15;
+    r[n] = data;
+    if(n == 0x0e && data & 0x80) mmio_commit();
+    return;
+  }
+
+  if((addr & 0xf8f000) == 0x105000) {  //$10-17:5000-5fff
+    return memory_write(ram, ((addr >> 16) & 7) * 0x1000 + (addr & 0xfff), data);
+  }
+}
+
+void BSXCartridge::mmio_commit() {
+  r00 = r[0x00] & 0x80;
+  r01 = r[0x01] & 0x80;
+  r02 = r[0x02] & 0x80;
+  r03 = r[0x03] & 0x80;
+  r04 = r[0x04] & 0x80;
+  r05 = r[0x05] & 0x80;
+  r06 = r[0x06] & 0x80;
+  r07 = r[0x07] & 0x80;
+  r08 = r[0x08] & 0x80;
+  r09 = r[0x09] & 0x80;
+  r0a = r[0x0a] & 0x80;
+  r0b = r[0x0b] & 0x80;
+  r0c = r[0x0c] & 0x80;
+  r0d = r[0x0d] & 0x80;
+  r0e = r[0x0e] & 0x80;
+  r0f = r[0x0f] & 0x80;
+}
+
 }
diff --git a/higan/sfc/chip/bsx/bsx.hpp b/higan/sfc/chip/bsx/bsx.hpp
index dd761a05..19815ca9 100755
--- a/higan/sfc/chip/bsx/bsx.hpp
+++ b/higan/sfc/chip/bsx/bsx.hpp
@@ -1,2 +1,34 @@
-#include "satellaview/satellaview.hpp"
-#include "cartridge/cartridge.hpp"
+struct BSXCartridge {
+  MappedRAM rom;
+  MappedRAM ram;
+  MappedRAM psram;
+
+  void init();
+  void load();
+  void unload();
+  void power();
+  void reset();
+
+  uint8 memory_access(bool write, Memory &memory, unsigned addr, uint8 data);
+  uint8 memory_read(Memory &memory, unsigned addr);
+  void memory_write(Memory &memory, unsigned addr, uint8 data);
+
+  uint8 mcu_access(bool write, unsigned addr, uint8 data = 0x00);
+  uint8 mcu_read(unsigned addr);
+  void mcu_write(unsigned addr, uint8 data);
+
+  uint8 mmio_read(unsigned addr);
+  void mmio_write(unsigned addr, uint8 data);
+  void mmio_commit();
+
+  void serialize(serializer&);
+
+private:
+  uint8 r[16];
+  bool r00, r01, r02, r03;
+  bool r04, r05, r06, r07;
+  bool r08, r09, r0a, r0b;
+  bool r0c, r0d, r0e, r0f;
+};
+
+extern BSXCartridge bsxcartridge;
diff --git a/higan/sfc/chip/bsx/cartridge/cartridge.cpp b/higan/sfc/chip/bsx/cartridge/cartridge.cpp
deleted file mode 100755
index c025e36a..00000000
--- a/higan/sfc/chip/bsx/cartridge/cartridge.cpp
+++ /dev/null
@@ -1,143 +0,0 @@
-#ifdef BSX_CPP
-
-#include "serialization.cpp"
-BSXCartridge bsxcartridge;
-
-void BSXCartridge::init() {
-}
-
-void BSXCartridge::load() {
-}
-
-void BSXCartridge::unload() {
-  rom.reset();
-  ram.reset();
-  psram.reset();
-}
-
-void BSXCartridge::power() {
-}
-
-void BSXCartridge::reset() {
-  for(unsigned i = 0; i < 16; i++) r[i] = 0x00;
-  r[0x07] = 0x80;
-  r[0x08] = 0x80;
-  mmio_commit();
-}
-
-uint8 BSXCartridge::memory_access(bool write, Memory &memory, unsigned addr, uint8 data) {
-  if(write == 0) return memory_read(memory, addr);
-  memory_write(memory, addr, data);
-}
-
-uint8 BSXCartridge::memory_read(Memory &memory, unsigned addr) {
-  addr = bus.mirror(addr, memory.size());
-  return memory.read(addr);
-}
-
-void BSXCartridge::memory_write(Memory &memory, unsigned addr, uint8 data) {
-  addr = bus.mirror(addr, memory.size());
-  return memory.write(addr, data);
-}
-
-//mcu_access() allows mcu_read() and mcu_write() to share decoding logic
-uint8 BSXCartridge::mcu_access(bool write, unsigned addr, uint8 data) {
-  if((addr & 0xe08000) == 0x008000) {  //$00-1f:8000-ffff
-    if(r07 == 1) {
-      addr = ((addr & 0x1f0000) >> 1) | (addr & 0x7fff);
-      return memory_access(write, rom, addr, data);
-    }
-  }
-
-  if((addr & 0xe08000) == 0x808000) {  //$80-9f:8000-ffff
-    if(r08 == 1) {
-      addr = ((addr & 0x1f0000) >> 1) | (addr & 0x7fff);
-      return memory_access(write, rom, addr, data);
-    }
-  }
-
-  if((addr & 0xe0e000) == 0x206000) {  //$20-3f:6000-7fff
-    return memory_access(write, psram, addr, data);
-  }
-
-  if((addr & 0xf00000) == 0x400000) {  //$40-4f:0000-ffff
-    if(r05 == 0) return memory_access(write, psram, addr & 0x0fffff, data);
-  }
-
-  if((addr & 0xf00000) == 0x500000) {  //$50-5f:0000-ffff
-    if(r06 == 0) return memory_access(write, psram, addr & 0x0fffff, data);
-  }
-
-  if((addr & 0xf00000) == 0x600000) {  //$60-6f:0000-ffff
-    if(r03 == 1) return memory_access(write, psram, addr & 0x0fffff, data);
-  }
-
-  if((addr & 0xf80000) == 0x700000) {  //$70-77:0000-ffff
-    return memory_access(write, psram, addr & 0x07ffff, data);
-  }
-
-  if(((addr & 0x408000) == 0x008000)  //$00-3f|80-bf:8000-ffff
-  || ((addr & 0x400000) == 0x400000)  //$40-7f|c0-ff:0000-ffff
-  ) {
-    if(r02 == 0) addr = ((addr & 0x7f0000) >> 1) | (addr & 0x7fff);
-    Memory &memory = (r01 == 0 ? (Memory&)satellaviewcartridge : (Memory&)psram);
-    return memory_access(write, memory, addr & 0x7fffff, data);
-  }
-
-  return cpu.regs.mdr;
-}
-
-uint8 BSXCartridge::mcu_read(unsigned addr) {
-  return mcu_access(0, addr);
-}
-
-void BSXCartridge::mcu_write(unsigned addr, uint8 data) {
-  mcu_access(1, addr, data);
-}
-
-uint8 BSXCartridge::mmio_read(unsigned addr) {
-  if((addr & 0xf0ffff) == 0x005000) {  //$00-0f:5000
-    uint8 n = (addr >> 16) & 15;
-    return r[n];
-  }
-
-  if((addr & 0xf8f000) == 0x105000) {  //$10-17:5000-5fff
-    return memory_read(ram, ((addr >> 16) & 7) * 0x1000 + (addr & 0xfff));
-  }
-
-  return 0x00;
-}
-
-void BSXCartridge::mmio_write(unsigned addr, uint8 data) {
-  if((addr & 0xf0ffff) == 0x005000) {  //$00-0f:5000
-    uint8 n = (addr >> 16) & 15;
-    r[n] = data;
-    if(n == 0x0e && data & 0x80) mmio_commit();
-    return;
-  }
-
-  if((addr & 0xf8f000) == 0x105000) {  //$10-17:5000-5fff
-    return memory_write(ram, ((addr >> 16) & 7) * 0x1000 + (addr & 0xfff), data);
-  }
-}
-
-void BSXCartridge::mmio_commit() {
-  r00 = r[0x00] & 0x80;
-  r01 = r[0x01] & 0x80;
-  r02 = r[0x02] & 0x80;
-  r03 = r[0x03] & 0x80;
-  r04 = r[0x04] & 0x80;
-  r05 = r[0x05] & 0x80;
-  r06 = r[0x06] & 0x80;
-  r07 = r[0x07] & 0x80;
-  r08 = r[0x08] & 0x80;
-  r09 = r[0x09] & 0x80;
-  r0a = r[0x0a] & 0x80;
-  r0b = r[0x0b] & 0x80;
-  r0c = r[0x0c] & 0x80;
-  r0d = r[0x0d] & 0x80;
-  r0e = r[0x0e] & 0x80;
-  r0f = r[0x0f] & 0x80;
-}
-
-#endif
diff --git a/higan/sfc/chip/bsx/cartridge/cartridge.hpp b/higan/sfc/chip/bsx/cartridge/cartridge.hpp
deleted file mode 100755
index 19815ca9..00000000
--- a/higan/sfc/chip/bsx/cartridge/cartridge.hpp
+++ /dev/null
@@ -1,34 +0,0 @@
-struct BSXCartridge {
-  MappedRAM rom;
-  MappedRAM ram;
-  MappedRAM psram;
-
-  void init();
-  void load();
-  void unload();
-  void power();
-  void reset();
-
-  uint8 memory_access(bool write, Memory &memory, unsigned addr, uint8 data);
-  uint8 memory_read(Memory &memory, unsigned addr);
-  void memory_write(Memory &memory, unsigned addr, uint8 data);
-
-  uint8 mcu_access(bool write, unsigned addr, uint8 data = 0x00);
-  uint8 mcu_read(unsigned addr);
-  void mcu_write(unsigned addr, uint8 data);
-
-  uint8 mmio_read(unsigned addr);
-  void mmio_write(unsigned addr, uint8 data);
-  void mmio_commit();
-
-  void serialize(serializer&);
-
-private:
-  uint8 r[16];
-  bool r00, r01, r02, r03;
-  bool r04, r05, r06, r07;
-  bool r08, r09, r0a, r0b;
-  bool r0c, r0d, r0e, r0f;
-};
-
-extern BSXCartridge bsxcartridge;
diff --git a/higan/sfc/chip/bsx/cartridge/serialization.cpp b/higan/sfc/chip/bsx/serialization.cpp
old mode 100755
new mode 100644
similarity index 83%
rename from higan/sfc/chip/bsx/cartridge/serialization.cpp
rename to higan/sfc/chip/bsx/serialization.cpp
index a982d822..aed4206b
--- a/higan/sfc/chip/bsx/cartridge/serialization.cpp
+++ b/higan/sfc/chip/bsx/serialization.cpp
@@ -1,4 +1,8 @@
+#ifdef BSX_CPP
+
 void BSXCartridge::serialize(serializer &s) {
   s.array(ram.data(), ram.size());
   s.array(psram.data(), psram.size());
 }
+
+#endif
diff --git a/higan/sfc/config/config.cpp b/higan/sfc/config/config.cpp
index 701af94c..f53ee1ca 100755
--- a/higan/sfc/config/config.cpp
+++ b/higan/sfc/config/config.cpp
@@ -5,7 +5,7 @@ Configuration config;
 Configuration::Configuration() {
   controller_port1 = Input::Device::Joypad;
   controller_port2 = Input::Device::Joypad;
-  expansion_port   = System::ExpansionPortDevice::BSX;
+  expansion_port   = System::ExpansionPortDevice::Satellaview;
   region           = System::Region::Autodetect;
   random           = true;
 
diff --git a/higan/sfc/ppu/screen/screen.cpp b/higan/sfc/ppu/screen/screen.cpp
index f59eea1a..94fbdb3e 100755
--- a/higan/sfc/ppu/screen/screen.cpp
+++ b/higan/sfc/ppu/screen/screen.cpp
@@ -3,159 +3,130 @@
 void PPU::Screen::scanline() {
   output = self.output + self.vcounter() * 1024;
   if(self.display.interlace && self.field()) output += 512;
+
+  //the first hires pixel of each scanline is transparent
+  //note: exact value initializations are not confirmed on hardware
+  math.main.color = get_color(0);
+  math.sub.color  = math.main.color;
+
+  math.main.color_enable = !(self.window.regs.col_main_mask & 1);
+  math.sub.color_enable  = !(self.window.regs.col_sub_mask  & 1) && regs.back_color_enable;
+
+  math.transparent = true;
+  math.addsub_mode = false;
+  math.color_halve = regs.color_halve && !regs.addsub_mode && math.main.color_enable;
 }
 
 void PPU::Screen::run() {
   if(ppu.vcounter() == 0) return;
 
-  uint32 color;
-  if(self.regs.pseudo_hires == false && self.regs.bgmode != 5 && self.regs.bgmode != 6) {
-    color = get_pixel(0);
-    *output++ = color;
-    *output++ = color;
-  } else {
-    color = get_pixel(1);
-    *output++ = color;
-    color = get_pixel(0);
-    *output++ = color;
-  }
+  auto palette = &video.palette[self.regs.display_brightness << 15];
+  bool hires   = self.regs.pseudo_hires || self.regs.bgmode == 5 || self.regs.bgmode == 6;
+  auto sscolor = get_pixel_sub(hires);
+  auto mscolor = get_pixel_main();
+
+  *output++ = palette[hires ? sscolor : mscolor];
+  *output++ = palette[mscolor];
 }
 
-uint32 PPU::Screen::get_pixel(bool swap) {
-  if(ppu.regs.overscan == false && ppu.vcounter() >= 225) return 0x0000;
-
-  enum source_t { BG1, BG2, BG3, BG4, OAM, BACK };
-  bool color_enable[] = { regs.bg1_color_enable, regs.bg2_color_enable, regs.bg3_color_enable, regs.bg4_color_enable, regs.oam_color_enable, regs.back_color_enable };
-
-  //===========
-  //main screen
-  //===========
-
-  unsigned priority_main = 0;
-  unsigned color_main;
-  unsigned source_main;
-
-  if(self.bg1.output.main.priority) {
-    priority_main = self.bg1.output.main.priority;
-    if(regs.direct_color && (self.regs.bgmode == 3 || self.regs.bgmode == 4 || self.regs.bgmode == 7)) {
-      color_main = get_direct_color(self.bg1.output.main.palette, self.bg1.output.main.tile);
-    } else {
-      color_main = get_color(self.bg1.output.main.palette);
-    }
-    source_main = BG1;
-  }
-  if(self.bg2.output.main.priority > priority_main) {
-    priority_main = self.bg2.output.main.priority;
-    color_main = get_color(self.bg2.output.main.palette);
-    source_main = BG2;
-  }
-  if(self.bg3.output.main.priority > priority_main) {
-    priority_main = self.bg3.output.main.priority;
-    color_main = get_color(self.bg3.output.main.palette);
-    source_main = BG3;
-  }
-  if(self.bg4.output.main.priority > priority_main) {
-    priority_main = self.bg4.output.main.priority;
-    color_main = get_color(self.bg4.output.main.palette);
-    source_main = BG4;
-  }
-  if(self.sprite.output.main.priority > priority_main) {
-    priority_main = self.sprite.output.main.priority;
-    color_main = get_color(self.sprite.output.main.palette);
-    source_main = OAM;
-  }
-  if(priority_main == 0) {
-    color_main = get_color(0);
-    source_main = BACK;
-  }
-
-  //==========
-  //sub screen
-  //==========
-
-  unsigned priority_sub = 0;
-  unsigned color_sub;
-  unsigned source_sub;
+uint16 PPU::Screen::get_pixel_sub(bool hires) {
+  if(self.regs.display_disable || (!self.regs.overscan && self.vcounter() >= 225)) return 0;
 
+  unsigned priority = 0;
   if(self.bg1.output.sub.priority) {
-    priority_sub = self.bg1.output.sub.priority;
+    priority = self.bg1.output.sub.priority;
     if(regs.direct_color && (self.regs.bgmode == 3 || self.regs.bgmode == 4 || self.regs.bgmode == 7)) {
-      color_sub = get_direct_color(self.bg1.output.sub.palette, self.bg1.output.sub.tile);
+      math.sub.color = get_direct_color(self.bg1.output.sub.palette, self.bg1.output.sub.tile);
     } else {
-      color_sub = get_color(self.bg1.output.sub.palette);
+      math.sub.color = get_color(self.bg1.output.sub.palette);
     }
-    source_sub = BG1;
   }
-  if(self.bg2.output.sub.priority > priority_sub) {
-    priority_sub = self.bg2.output.sub.priority;
-    color_sub = get_color(self.bg2.output.sub.palette);
-    source_sub = BG2;
+  if(self.bg2.output.sub.priority > priority) {
+    priority = self.bg2.output.sub.priority;
+    math.sub.color = get_color(self.bg2.output.sub.palette);
   }
-  if(self.bg3.output.sub.priority > priority_sub) {
-    priority_sub = self.bg3.output.sub.priority;
-    color_sub = get_color(self.bg3.output.sub.palette);
-    source_sub = BG3;
+  if(self.bg3.output.sub.priority > priority) {
+    priority = self.bg3.output.sub.priority;
+    math.sub.color = get_color(self.bg3.output.sub.palette);
   }
-  if(self.bg4.output.sub.priority > priority_sub) {
-    priority_sub = self.bg4.output.sub.priority;
-    color_sub = get_color(self.bg4.output.sub.palette);
-    source_sub = BG4;
+  if(self.bg4.output.sub.priority > priority) {
+    priority = self.bg4.output.sub.priority;
+    math.sub.color = get_color(self.bg4.output.sub.palette);
   }
-  if(self.sprite.output.sub.priority > priority_sub) {
-    priority_sub = self.sprite.output.sub.priority;
-    color_sub = get_color(self.sprite.output.sub.palette);
-    source_sub = OAM;
-  }
-  if(priority_sub == 0) {
-    if(self.regs.pseudo_hires == true || self.regs.bgmode == 5 || self.regs.bgmode == 6) {
-      color_sub = get_color(0);
-    } else {
-      color_sub = (regs.color_b << 10) + (regs.color_g << 5) + (regs.color_r << 0);
-    }
-    source_sub = BACK;
+  if(self.sprite.output.sub.priority > priority) {
+    priority = self.sprite.output.sub.priority;
+    math.sub.color = get_color(self.sprite.output.sub.palette);
   }
+  if(math.transparent = (priority == 0)) math.sub.color = get_color(0);
 
-  if(swap == true) {
-    std::swap(priority_main, priority_sub);
-    std::swap(color_main, color_sub);
-    std::swap(source_main, source_sub);
-  }
+  if(!hires) return 0;
+  if(!math.sub.color_enable) return math.main.color_enable ? math.sub.color : 0;
 
-  uint16 output;
-  if(!regs.addsub_mode) {
-    source_sub = BACK;
-    color_sub = (regs.color_b << 10) + (regs.color_g << 5) + (regs.color_r << 0);
-  }
-
-  if(self.window.output.main.color_enable == false) {
-    if(self.window.output.sub.color_enable == false) {
-      return 0x0000;
-    }
-    color_main = 0x0000;
-  }
-
-  bool color_exempt = (source_main == OAM && self.sprite.output.main.palette < 192);
-  if(!color_exempt && color_enable[source_main] && self.window.output.sub.color_enable) {
-    bool halve = false;
-    if(regs.color_halve && self.window.output.main.color_enable) {
-      if(!regs.addsub_mode || source_sub != BACK) halve = true;
-    }
-    output = addsub(color_main, color_sub, halve);
-  } else {
-    output = color_main;
-  }
-
-  //========
-  //lighting
-  //========
-
-  if(self.regs.display_disable) return 0;
-  return video.palette[self.regs.display_brightness << 15 | output];
+  return addsub(
+    math.main.color_enable ? math.sub.color : 0,
+    math.addsub_mode ? math.main.color : fixed_color()
+  );
 }
 
-uint16 PPU::Screen::addsub(unsigned x, unsigned y, bool halve) {
+uint16 PPU::Screen::get_pixel_main() {
+  if(self.regs.display_disable || (!self.regs.overscan && self.vcounter() >= 225)) return 0;
+
+  unsigned priority = 0;
+  if(self.bg1.output.main.priority) {
+    priority = self.bg1.output.main.priority;
+    if(regs.direct_color && (self.regs.bgmode == 3 || self.regs.bgmode == 4 || self.regs.bgmode == 7)) {
+      math.main.color = get_direct_color(self.bg1.output.main.palette, self.bg1.output.main.tile);
+    } else {
+      math.main.color = get_color(self.bg1.output.main.palette);
+    }
+    math.sub.color_enable = regs.bg1_color_enable;
+  }
+  if(self.bg2.output.main.priority > priority) {
+    priority = self.bg2.output.main.priority;
+    math.main.color = get_color(self.bg2.output.main.palette);
+    math.sub.color_enable = regs.bg2_color_enable;
+  }
+  if(self.bg3.output.main.priority > priority) {
+    priority = self.bg3.output.main.priority;
+    math.main.color = get_color(self.bg3.output.main.palette);
+    math.sub.color_enable = regs.bg3_color_enable;
+  }
+  if(self.bg4.output.main.priority > priority) {
+    priority = self.bg4.output.main.priority;
+    math.main.color = get_color(self.bg4.output.main.palette);
+    math.sub.color_enable = regs.bg4_color_enable;
+  }
+  if(self.sprite.output.main.priority > priority) {
+    priority = self.sprite.output.main.priority;
+    math.main.color = get_color(self.sprite.output.main.palette);
+    math.sub.color_enable = regs.oam_color_enable && self.sprite.output.main.palette >= 192;
+  }
+  if(priority == 0) {
+    math.main.color = get_color(0);
+    math.sub.color_enable = regs.back_color_enable;
+  }
+
+  if(!self.window.output.sub.color_enable) math.sub.color_enable = false;
+  math.main.color_enable = self.window.output.main.color_enable;
+  if(!math.sub.color_enable) return math.main.color_enable ? math.main.color : 0;
+
+  if(regs.addsub_mode && math.transparent) {
+    math.addsub_mode = false;
+    math.color_halve = false;
+  } else {
+    math.addsub_mode = regs.addsub_mode;
+    math.color_halve = regs.color_halve && math.main.color_enable;
+  }
+
+  return addsub(
+    math.main.color_enable ? math.main.color : 0,
+    math.addsub_mode ? math.sub.color : fixed_color()
+  );
+}
+
+uint16 PPU::Screen::addsub(unsigned x, unsigned y) {
   if(!regs.color_mode) {
-    if(!halve) {
+    if(!math.color_halve) {
       unsigned sum = x + y;
       unsigned carry = (sum - ((x ^ y) & 0x0421)) & 0x8420;
       return (sum - carry) | (carry - (carry >> 5));
@@ -165,7 +136,7 @@ uint16 PPU::Screen::addsub(unsigned x, unsigned y, bool halve) {
   } else {
     unsigned diff = x - y + 0x8420;
     unsigned borrow = (diff - ((x ^ y) & 0x8420)) & 0x8420;
-    if(!halve) {
+    if(!math.color_halve) {
       return   (diff - borrow) & (borrow - (borrow >> 5));
     } else {
       return (((diff - borrow) & (borrow - (borrow >> 5))) & 0x7bde) >> 1;
@@ -188,6 +159,10 @@ uint16 PPU::Screen::get_direct_color(unsigned palette, unsigned tile) {
        + ((palette << 2) & 0x001c) + ((tile >> 9) & 0x0002);
 }
 
+uint16 PPU::Screen::fixed_color() const {
+  return (regs.color_b << 10) | (regs.color_g << 5) | (regs.color_r << 0);
+}
+
 void PPU::Screen::reset() {
   regs.addsub_mode = random(false);
   regs.direct_color = random(false);
diff --git a/higan/sfc/ppu/screen/screen.hpp b/higan/sfc/ppu/screen/screen.hpp
index 6c674841..ca861818 100755
--- a/higan/sfc/ppu/screen/screen.hpp
+++ b/higan/sfc/ppu/screen/screen.hpp
@@ -19,14 +19,26 @@ struct Screen {
     uint5 color_r;
   } regs;
 
+  struct Math {
+    struct Layer {
+      uint16 color;
+      bool color_enable;
+    } main, sub;
+    bool transparent;
+    bool addsub_mode;
+    bool color_halve;
+  } math;
+
   void scanline();
   void run();
   void reset();
 
-  uint32 get_pixel(bool swap);
-  uint16 addsub(unsigned x, unsigned y, bool halve);
+  uint16 get_pixel_sub(bool hires);
+  uint16 get_pixel_main();
+  uint16 addsub(unsigned x, unsigned y);
   uint16 get_color(unsigned palette);
   uint16 get_direct_color(unsigned palette, unsigned tile);
+  uint16 fixed_color() const;
 
   void serialize(serializer&);
   Screen(PPU &self);
diff --git a/higan/sfc/ppu/serialization.cpp b/higan/sfc/ppu/serialization.cpp
index d8d6ec91..07a56a63 100755
--- a/higan/sfc/ppu/serialization.cpp
+++ b/higan/sfc/ppu/serialization.cpp
@@ -279,6 +279,14 @@ void PPU::Screen::serialize(serializer &s) {
   s.integer(regs.color_b);
   s.integer(regs.color_g);
   s.integer(regs.color_r);
+
+  s.integer(math.main.color);
+  s.integer(math.main.color_enable);
+  s.integer(math.sub.color);
+  s.integer(math.sub.color_enable);
+  s.integer(math.transparent);
+  s.integer(math.addsub_mode);
+  s.integer(math.color_halve);
 }
 
 #endif
diff --git a/higan/sfc/sfc.hpp b/higan/sfc/sfc.hpp
index 3219e28e..501a7202 100755
--- a/higan/sfc/sfc.hpp
+++ b/higan/sfc/sfc.hpp
@@ -12,7 +12,7 @@
 namespace SuperFamicom {
   namespace Info {
     static const char Name[] = "bsnes";
-    static const unsigned SerializerVersion = 25;
+    static const unsigned SerializerVersion = 26;
   }
 }
 
@@ -65,6 +65,7 @@ namespace SuperFamicom {
 
   #include <sfc/controller/controller.hpp>
   #include <sfc/system/system.hpp>
+  #include <sfc/base/base.hpp>
   #include <sfc/chip/chip.hpp>
   #include <sfc/slot/slot.hpp>
   #include <sfc/cartridge/cartridge.hpp>
diff --git a/higan/sfc/system/system.cpp b/higan/sfc/system/system.cpp
index a69812b2..69f6eead 100755
--- a/higan/sfc/system/system.cpp
+++ b/higan/sfc/system/system.cpp
@@ -64,7 +64,7 @@ void System::runthreadtosave() {
 void System::init() {
   assert(interface != nullptr);
 
-  bsxsatellaview.init();
+  satellaviewbaseunit.init();
   icd2.init();
   bsxcartridge.init();
   nss.init();
@@ -119,7 +119,7 @@ void System::load() {
   cpu.enable();
   ppu.enable();
 
-  if(expansion() == ExpansionPortDevice::BSX) bsxsatellaview.load();
+  if(expansion() == ExpansionPortDevice::Satellaview) satellaviewbaseunit.load();
   if(cartridge.has_gb_slot()) icd2.load();
   if(cartridge.has_bs_cart()) bsxcartridge.load();
   if(cartridge.has_nss_dip()) nss.load();
@@ -144,7 +144,7 @@ void System::load() {
 }
 
 void System::unload() {
-  if(expansion() == ExpansionPortDevice::BSX) bsxsatellaview.unload();
+  if(expansion() == ExpansionPortDevice::Satellaview) satellaviewbaseunit.unload();
   if(cartridge.has_gb_slot()) icd2.unload();
   if(cartridge.has_bs_cart()) bsxcartridge.unload();
   if(cartridge.has_nss_dip()) nss.unload();
@@ -173,7 +173,7 @@ void System::power() {
   dsp.power();
   ppu.power();
 
-  if(expansion() == ExpansionPortDevice::BSX) bsxsatellaview.power();
+  if(expansion() == ExpansionPortDevice::Satellaview) satellaviewbaseunit.power();
   if(cartridge.has_gb_slot()) icd2.power();
   if(cartridge.has_bs_cart()) bsxcartridge.power();
   if(cartridge.has_nss_dip()) nss.power();
@@ -201,7 +201,7 @@ void System::reset() {
   dsp.reset();
   ppu.reset();
 
-  if(expansion() == ExpansionPortDevice::BSX) bsxsatellaview.reset();
+  if(expansion() == ExpansionPortDevice::Satellaview) satellaviewbaseunit.reset();
   if(cartridge.has_gb_slot()) icd2.reset();
   if(cartridge.has_bs_cart()) bsxcartridge.reset();
   if(cartridge.has_nss_dip()) nss.reset();
@@ -247,7 +247,7 @@ void System::frame() {
 
 System::System() {
   region = Region::Autodetect;
-  expansion = ExpansionPortDevice::BSX;
+  expansion = ExpansionPortDevice::Satellaview;
 }
 
 }
diff --git a/higan/sfc/system/system.hpp b/higan/sfc/system/system.hpp
index 3bb08aef..1374fa7a 100755
--- a/higan/sfc/system/system.hpp
+++ b/higan/sfc/system/system.hpp
@@ -2,7 +2,7 @@ struct Interface;
 
 struct System : property<System> {
   enum class Region : unsigned { NTSC = 0, PAL = 1, Autodetect = 2 };
-  enum class ExpansionPortDevice : unsigned { None = 0, BSX = 1 };
+  enum class ExpansionPortDevice : unsigned { None = 0, Satellaview = 1 };
 
   void run();
   void runtosave();
diff --git a/higan/target-ethos/settings/timing.cpp b/higan/target-ethos/settings/timing.cpp
index cd734454..a1b1fbc1 100755
--- a/higan/target-ethos/settings/timing.cpp
+++ b/higan/target-ethos/settings/timing.cpp
@@ -81,7 +81,7 @@ void TimingSettings::analyzeStart() {
   settings->panelList.setEnabled(false);
   videoAdjust.analyze.setEnabled(false);
   audioAdjust.analyze.setEnabled(false);
-  settings->setStatusText("Initiailizing ...");
+  settings->setStatusText("Initializing ...");
   OS::processEvents();
 
   analysis.stop = false;