diff --git a/bsnes/gameboy/cartridge/huc1/huc1.cpp b/bsnes/gameboy/cartridge/huc1/huc1.cpp
index 8a5531eb..b8fb1101 100755
--- a/bsnes/gameboy/cartridge/huc1/huc1.cpp
+++ b/bsnes/gameboy/cartridge/huc1/huc1.cpp
@@ -1,53 +1,54 @@
 #ifdef CARTRIDGE_CPP
 
 uint8 Cartridge::HuC1::mmio_read(uint16 addr) {
-  if(within<0x0000, 0x3fff>(addr)) {
+  if((addr & 0xc000) == 0x0000) {  //$0000-3fff
     return cartridge.rom_read(addr);
   }
 
-  if(within<0x4000, 0x7fff>(addr)) {
+  if((addr & 0xc000) == 0x4000) {  //$4000-7fff
     return cartridge.rom_read((rom_select << 14) | (addr & 0x3fff));
   }
 
-  if(within<0xa000, 0xbfff>(addr)) {
-    if(ram_enable) return cartridge.ram_read((ram_select << 13) | (addr & 0x1fff));
-    return 0x00;
+  if((addr & 0xe000) == 0xa000) {  //$a000-bfff
+    return cartridge.ram_read((ram_select << 13) | (addr & 0x1fff));
   }
 
   return 0x00;
 }
 
 void Cartridge::HuC1::mmio_write(uint16 addr, uint8 data) {
-  if(within<0x0000, 0x1fff>(addr)) {
-    ram_enable = (data & 0x0f) == 0x0a;
+  if((addr & 0xe000) == 0x0000) {  //$0000-1fff
+    ram_writable = (data & 0x0f) == 0x0a;
     return;
   }
 
-  if(within<0x2000, 0x3fff>(addr)) {
+  if((addr & 0xe000) == 0x2000) {  //$2000-3fff
     rom_select = data;
+    if(rom_select == 0) rom_select = 1;
     return;
   }
 
-  if(within<0x4000, 0x5fff>(addr)) {
+  if((addr & 0xe000) == 0x4000) {  //$4000-5fff
     ram_select = data;
     return;
   }
 
-  if(within<0x6000, 0x7fff>(addr)) {
-    //unknown purpose
+  if((addr & 0xe000) == 0x6000) {  //$6000-7fff
+    model = data & 0x01;
     return;
   }
 
-  if(within<0xa000, 0xbfff>(addr)) {
-    if(ram_enable) cartridge.ram_write((ram_select << 13) | (addr & 0x1fff), data);
-    return;
+  if((addr & 0xe000) == 0xa000) {  //$a000-bfff
+    if(ram_writable == false) return;
+    return cartridge.ram_write((ram_select << 13) | (addr & 0x1fff), data);
   }
 }
 
 void Cartridge::HuC1::power() {
-  ram_enable = false;
+  ram_writable = false;
   rom_select = 0x01;
   ram_select = 0x00;
+  model = 0;
 }
 
 #endif
diff --git a/bsnes/gameboy/cartridge/huc1/huc1.hpp b/bsnes/gameboy/cartridge/huc1/huc1.hpp
index f7bcc37d..f0f60d8f 100755
--- a/bsnes/gameboy/cartridge/huc1/huc1.hpp
+++ b/bsnes/gameboy/cartridge/huc1/huc1.hpp
@@ -1,7 +1,8 @@
 struct HuC1 : MMIO {
-  bool ram_enable;   //0000-1fff
-  uint8 rom_select;  //2000-3fff
-  uint8 ram_select;  //4000-5fff
+  bool ram_writable;  //$0000-1fff
+  uint8 rom_select;   //$2000-3fff
+  uint8 ram_select;   //$4000-5fff
+  bool model;         //$6000-7fff
 
   uint8 mmio_read(uint16 addr);
   void mmio_write(uint16 addr, uint8 data);
diff --git a/bsnes/gameboy/cartridge/huc3/huc3.cpp b/bsnes/gameboy/cartridge/huc3/huc3.cpp
index efaa9af0..c2bdcda4 100755
--- a/bsnes/gameboy/cartridge/huc3/huc3.cpp
+++ b/bsnes/gameboy/cartridge/huc3/huc3.cpp
@@ -1,15 +1,15 @@
 #ifdef CARTRIDGE_CPP
 
 uint8 Cartridge::HuC3::mmio_read(uint16 addr) {
-  if(within<0x0000, 0x3fff>(addr)) {
+  if((addr & 0xc000) == 0x0000) {  //$0000-3fff
     return cartridge.rom_read(addr);
   }
 
-  if(within<0x4000, 0x7fff>(addr)) {
+  if((addr & 0xc000) == 0x4000) {  //$4000-7fff
     return cartridge.rom_read((rom_select << 14) | (addr & 0x3fff));
   }
 
-  if(within<0xa000, 0xbfff>(addr)) {
+  if((addr & 0xe000) == 0xa000) {  //$a000-bfff
     if(ram_enable) return cartridge.ram_read((ram_select << 13) | (addr & 0x1fff));
     return 0x00;
   }
@@ -18,27 +18,27 @@ uint8 Cartridge::HuC3::mmio_read(uint16 addr) {
 }
 
 void Cartridge::HuC3::mmio_write(uint16 addr, uint8 data) {
-  if(within<0x0000, 0x1fff>(addr)) {
+  if((addr & 0xe000) == 0x0000) {  //$0000-1fff
     ram_enable = (data & 0x0f) == 0x0a;
     return;
   }
 
-  if(within<0x2000, 0x3fff>(addr)) {
+  if((addr & 0xe000) == 0x2000) {  //$2000-3fff
     rom_select = data;
     return;
   }
 
-  if(within<0x4000, 0x5fff>(addr)) {
+  if((addr & 0xe000) == 0x4000) {  //$4000-5fff
     ram_select = data;
     return;
   }
 
-  if(within<0x6000, 0x7fff>(addr)) {
+  if((addr & 0xe000) == 0x6000) {  //$6000-7fff
     //unknown purpose
     return;
   }
 
-  if(within<0xa000, 0xbfff>(addr)) {
+  if((addr & 0xe000) == 0xa000) {  //$a000-bfff
     if(ram_enable) cartridge.ram_write((ram_select << 13) | (addr & 0x1fff), data);
     return;
   }
diff --git a/bsnes/gameboy/cartridge/huc3/huc3.hpp b/bsnes/gameboy/cartridge/huc3/huc3.hpp
index 407d3bd4..61d4aa61 100755
--- a/bsnes/gameboy/cartridge/huc3/huc3.hpp
+++ b/bsnes/gameboy/cartridge/huc3/huc3.hpp
@@ -1,7 +1,7 @@
 struct HuC3 : MMIO {
-  bool ram_enable;   //0000-1fff
-  uint8 rom_select;  //2000-3fff
-  uint8 ram_select;  //4000-5fff
+  bool ram_enable;   //$0000-1fff
+  uint8 rom_select;  //$2000-3fff
+  uint8 ram_select;  //$4000-5fff
 
   uint8 mmio_read(uint16 addr);
   void mmio_write(uint16 addr, uint8 data);
diff --git a/bsnes/gameboy/cartridge/mbc0/mbc0.cpp b/bsnes/gameboy/cartridge/mbc0/mbc0.cpp
index f3280f31..2312f572 100755
--- a/bsnes/gameboy/cartridge/mbc0/mbc0.cpp
+++ b/bsnes/gameboy/cartridge/mbc0/mbc0.cpp
@@ -1,11 +1,11 @@
 #ifdef CARTRIDGE_CPP
 
 uint8 Cartridge::MBC0::mmio_read(uint16 addr) {
-  if(within<0x0000, 0x7fff>(addr)) {
+  if((addr & 0x8000) == 0x0000) {  //$0000-7fff
     return cartridge.rom_read(addr);
   }
 
-  if(within<0xa000, 0xbfff>(addr)) {
+  if((addr & 0xe000) == 0xa000) {  //$a000-bfff
     return cartridge.ram_read(addr & 0x1fff);
   }
 
@@ -13,7 +13,7 @@ uint8 Cartridge::MBC0::mmio_read(uint16 addr) {
 }
 
 void Cartridge::MBC0::mmio_write(uint16 addr, uint8 data) {
-  if(within<0xa000, 0xbfff>(addr)) {
+  if((addr & 0xe000) == 0xa000) {  //$a000-bfff
     cartridge.ram_write(addr & 0x1fff, data);
     return;
   }
diff --git a/bsnes/gameboy/cartridge/mbc1/mbc1.cpp b/bsnes/gameboy/cartridge/mbc1/mbc1.cpp
index d254e7fe..7e15c135 100755
--- a/bsnes/gameboy/cartridge/mbc1/mbc1.cpp
+++ b/bsnes/gameboy/cartridge/mbc1/mbc1.cpp
@@ -1,11 +1,11 @@
 #ifdef CARTRIDGE_CPP
 
 uint8 Cartridge::MBC1::mmio_read(uint16 addr) {
-  if(within<0x0000, 0x3fff>(addr)) {
+  if((addr & 0xc000) == 0x0000) {  //$0000-3fff
     return cartridge.rom_read(addr);
   }
 
-  if(within<0x4000, 0x7fff>(addr)) {
+  if((addr & 0xc000) == 0x4000) {  //$4000-7fff
     if(mode_select == 0) {
       return cartridge.rom_read((ram_select << 19) | (rom_select << 14) | (addr & 0x3fff));
     } else {
@@ -13,7 +13,7 @@ uint8 Cartridge::MBC1::mmio_read(uint16 addr) {
     }
   }
 
-  if(within<0xa000, 0xbfff>(addr)) {
+  if((addr & 0xe000) == 0xa000) {  //$a000-bfff
     if(ram_enable) {
       if(mode_select == 0) {
         return cartridge.ram_read(addr & 0x1fff);
@@ -28,27 +28,27 @@ uint8 Cartridge::MBC1::mmio_read(uint16 addr) {
 }
 
 void Cartridge::MBC1::mmio_write(uint16 addr, uint8 data) {
-  if(within<0x0000, 0x1fff>(addr)) {
+  if((addr & 0xe000) == 0x0000) {  //$0000-1fff
     ram_enable = (data & 0x0f) == 0x0a;
     return;
   }
 
-  if(within<0x2000, 0x3fff>(addr)) {
+  if((addr & 0xe000) == 0x2000) {  //$2000-3fff
     rom_select = (data & 0x1f) + ((data & 0x1f) == 0);
     return;
   }
 
-  if(within<0x4000, 0x5fff>(addr)) {
+  if((addr & 0xe000) == 0x4000) {  //$4000-5fff
     ram_select = data & 0x03;
     return;
   }
 
-  if(within<0x6000, 0x7fff>(addr)) {
+  if((addr & 0xe000) == 0x6000) {  //$6000-7fff
     mode_select = data & 0x01;
     return;
   }
 
-  if(within<0xa000, 0xbfff>(addr)) {
+  if((addr & 0xe000) == 0xa000) {  //$a000-bfff
     if(ram_enable) {
       if(mode_select == 0) {
         cartridge.ram_write(addr & 0x1fff, data);
diff --git a/bsnes/gameboy/cartridge/mbc1/mbc1.hpp b/bsnes/gameboy/cartridge/mbc1/mbc1.hpp
index 099cf43d..19f8b75b 100755
--- a/bsnes/gameboy/cartridge/mbc1/mbc1.hpp
+++ b/bsnes/gameboy/cartridge/mbc1/mbc1.hpp
@@ -1,8 +1,8 @@
 struct MBC1 : MMIO {
-  bool  ram_enable;   //0000-1fff
-  uint8 rom_select;   //2000-3fff
-  uint8 ram_select;   //4000-5fff
-  bool  mode_select;  //6000-7fff
+  bool  ram_enable;   //$0000-1fff
+  uint8 rom_select;   //$2000-3fff
+  uint8 ram_select;   //$4000-5fff
+  bool  mode_select;  //$6000-7fff
 
   uint8 mmio_read(uint16 addr);
   void mmio_write(uint16 addr, uint8 data);
diff --git a/bsnes/gameboy/cartridge/mbc2/mbc2.cpp b/bsnes/gameboy/cartridge/mbc2/mbc2.cpp
index d5c9be1a..0e0825f8 100755
--- a/bsnes/gameboy/cartridge/mbc2/mbc2.cpp
+++ b/bsnes/gameboy/cartridge/mbc2/mbc2.cpp
@@ -1,15 +1,15 @@
 #ifdef CARTRIDGE_CPP
 
 uint8 Cartridge::MBC2::mmio_read(uint16 addr) {
-  if(within<0x0000, 0x3fff>(addr)) {
+  if((addr & 0xc000) == 0x0000) {  //$0000-3fff
     return cartridge.rom_read(addr);
   }
 
-  if(within<0x4000, 0x7fff>(addr)) {
+  if((addr & 0xc000) == 0x4000) {  //$4000-7fff
     return cartridge.rom_read((rom_select << 14) | (addr & 0x3fff));
   }
 
-  if(within<0xa000, 0xa1ff>(addr)) {
+  if((addr & 0xee00) == 0xa000) {  //$a000-a1ff
     if(ram_enable) return cartridge.ram_read(addr & 0x1ff);
     return 0x00;
   }
@@ -18,17 +18,17 @@ uint8 Cartridge::MBC2::mmio_read(uint16 addr) {
 }
 
 void Cartridge::MBC2::mmio_write(uint16 addr, uint8 data) {
-  if(within<0x0000, 0x1fff>(addr)) {
+  if((addr & 0xe000) == 0x0000) {  //$0000-1fff
     if(!(addr & 0x0100)) ram_enable = (data & 0x0f) == 0x0a;
     return;
   }
 
-  if(within<0x2000, 0x3fff>(addr)) {
+  if((addr & 0xe000) == 0x2000) {  //$2000-3fff
     if( (addr & 0x0100)) rom_select = (data & 0x0f) + ((data & 0x0f) == 0);
     return;
   }
 
-  if(within<0xa000, 0xa1ff>(addr)) {
+  if((addr & 0xee00) == 0xa000) {  //$a000-a1ff
     if(ram_enable) cartridge.ram_write(addr & 0x1ff, data & 0x0f);
     return;
   }
diff --git a/bsnes/gameboy/cartridge/mbc2/mbc2.hpp b/bsnes/gameboy/cartridge/mbc2/mbc2.hpp
index be9b7db6..c22a652a 100755
--- a/bsnes/gameboy/cartridge/mbc2/mbc2.hpp
+++ b/bsnes/gameboy/cartridge/mbc2/mbc2.hpp
@@ -1,6 +1,6 @@
 struct MBC2 : MMIO {
-  bool  ram_enable;  //0000-1fff
-  uint8 rom_select;  //2000-3fff
+  bool  ram_enable;  //$0000-1fff
+  uint8 rom_select;  //$2000-3fff
 
   uint8 mmio_read(uint16 addr);
   void mmio_write(uint16 addr, uint8 data);
diff --git a/bsnes/gameboy/cartridge/mbc3/mbc3.cpp b/bsnes/gameboy/cartridge/mbc3/mbc3.cpp
index d04ca8c0..595ac1d9 100755
--- a/bsnes/gameboy/cartridge/mbc3/mbc3.cpp
+++ b/bsnes/gameboy/cartridge/mbc3/mbc3.cpp
@@ -19,15 +19,15 @@ void Cartridge::MBC3::second() {
 }
 
 uint8 Cartridge::MBC3::mmio_read(uint16 addr) {
-  if(within<0x0000, 0x3fff>(addr)) {
+  if((addr & 0xc000) == 0x0000) {  //$0000-3fff
     return cartridge.rom_read(addr);
   }
 
-  if(within<0x4000, 0x7fff>(addr)) {
+  if((addr & 0xc000) == 0x4000) {  //$4000-7fff
     return cartridge.rom_read((rom_select << 14) | (addr & 0x3fff));
   }
 
-  if(within<0xa000, 0xbfff>(addr)) {
+  if((addr & 0xe000) == 0xa000) {  //$a000-bfff
     if(ram_enable) {
       if(ram_select >= 0x00 && ram_select <= 0x03) {
         return cartridge.ram_read((ram_select << 13) | (addr & 0x1fff));
@@ -45,22 +45,22 @@ uint8 Cartridge::MBC3::mmio_read(uint16 addr) {
 }
 
 void Cartridge::MBC3::mmio_write(uint16 addr, uint8 data) {
-  if(within<0x0000, 0x1fff>(addr)) {
+  if((addr & 0xe000) == 0x0000) {  //$0000-1fff
     ram_enable = (data & 0x0f) == 0x0a;
     return;
   }
 
-  if(within<0x2000, 0x3fff>(addr)) {
+  if((addr & 0xe000) == 0x2000) {  //$2000-3fff
     rom_select = (data & 0x7f) + ((data & 0x7f) == 0);
     return;
   }
 
-  if(within<0x4000, 0x5fff>(addr)) {
+  if((addr & 0xe000) == 0x4000) {  //$4000-5fff
     ram_select = data;
     return;
   }
 
-  if(within<0x6000, 0x7fff>(addr)) {
+  if((addr & 0xe000) == 0x6000) {  //$6000-7fff
     if(rtc_latch == 0 && data == 1) {
       rtc_latch_second = rtc_second;
       rtc_latch_minute = rtc_minute;
@@ -72,7 +72,7 @@ void Cartridge::MBC3::mmio_write(uint16 addr, uint8 data) {
     return;
   }
 
-  if(within<0xa000, 0xbfff>(addr)) {
+  if((addr & 0xe000) == 0xa000) {  //$a000-bfff
     if(ram_enable) {
       if(ram_select >= 0x00 && ram_select <= 0x03) {
         cartridge.ram_write((ram_select << 13) | (addr & 0x1fff), data);
diff --git a/bsnes/gameboy/cartridge/mbc3/mbc3.hpp b/bsnes/gameboy/cartridge/mbc3/mbc3.hpp
index d83ba182..fbd7775d 100755
--- a/bsnes/gameboy/cartridge/mbc3/mbc3.hpp
+++ b/bsnes/gameboy/cartridge/mbc3/mbc3.hpp
@@ -1,8 +1,8 @@
 struct MBC3 : MMIO {
-  bool  ram_enable;  //0000-1fff
-  uint8 rom_select;  //2000-3fff
-  uint8 ram_select;  //4000-5fff
-  bool rtc_latch;    //6000-7fff
+  bool  ram_enable;  //$0000-1fff
+  uint8 rom_select;  //$2000-3fff
+  uint8 ram_select;  //$4000-5fff
+  bool rtc_latch;    //$6000-7fff
 
   bool rtc_halt;
   unsigned rtc_second;
diff --git a/bsnes/gameboy/cartridge/mbc5/mbc5.cpp b/bsnes/gameboy/cartridge/mbc5/mbc5.cpp
index 4dc215bb..52f3223b 100755
--- a/bsnes/gameboy/cartridge/mbc5/mbc5.cpp
+++ b/bsnes/gameboy/cartridge/mbc5/mbc5.cpp
@@ -1,15 +1,15 @@
 #ifdef CARTRIDGE_CPP
 
 uint8 Cartridge::MBC5::mmio_read(uint16 addr) {
-  if(within<0x0000, 0x3fff>(addr)) {
+  if((addr & 0xc000) == 0x0000) {  //$0000-3fff
     return cartridge.rom_read(addr);
   }
 
-  if(within<0x4000, 0x7fff>(addr)) {
+  if((addr & 0xc000) == 0x4000) {  //$4000-7fff
     return cartridge.rom_read((rom_select << 14) | (addr & 0x3fff));
   }
 
-  if(within<0xa000, 0xbfff>(addr)) {
+  if((addr & 0xe000) == 0xa000) {  //$a000-bfff
     if(ram_enable) return cartridge.ram_read((ram_select << 13) | (addr & 0x1fff));
     return 0x00;
   }
@@ -18,27 +18,27 @@ uint8 Cartridge::MBC5::mmio_read(uint16 addr) {
 }
 
 void Cartridge::MBC5::mmio_write(uint16 addr, uint8 data) {
-  if(within<0x0000, 0x1fff>(addr)) {
+  if((addr & 0xe000) == 0x0000) {  //$0000-1fff
     ram_enable = (data & 0x0f) == 0x0a;
     return;
   }
 
-  if(within<0x2000, 0x2fff>(addr)) {
+  if((addr & 0xf000) == 0x2000) {  //$2000-2fff
     rom_select = (rom_select & 0x0100) | data;
     return;
   }
 
-  if(within<0x3000, 0x3fff>(addr)) {
+  if((addr & 0xf000) == 0x3000) {  //$3000-3fff
     rom_select = ((data & 1) << 8) | (rom_select & 0x00ff);
     return;
   }
 
-  if(within<0x4000, 0x5fff>(addr)) {
+  if((addr & 0xe000) == 0x4000) {  //$4000-5fff
     ram_select = data & 0x0f;
     return;
   }
 
-  if(within<0xa000, 0xbfff>(addr)) {
+  if((addr & 0xe000) == 0xa000) {  //$a000-bfff
     if(ram_enable) cartridge.ram_write((ram_select << 13) | (addr & 0x1fff), data);
     return;
   }
diff --git a/bsnes/gameboy/cartridge/mbc5/mbc5.hpp b/bsnes/gameboy/cartridge/mbc5/mbc5.hpp
index 7d5b0a30..0ec3abb0 100755
--- a/bsnes/gameboy/cartridge/mbc5/mbc5.hpp
+++ b/bsnes/gameboy/cartridge/mbc5/mbc5.hpp
@@ -1,7 +1,7 @@
 struct MBC5 : MMIO {
-  bool ram_enable;    //0000-1fff
-  uint16 rom_select;  //2000-2fff + 3000-3fff
-  uint8 ram_select;   //4000-5fff
+  bool ram_enable;    //$0000-1fff
+  uint16 rom_select;  //$2000-2fff + $3000-3fff
+  uint8 ram_select;   //$4000-5fff
 
   uint8 mmio_read(uint16 addr);
   void mmio_write(uint16 addr, uint8 data);
diff --git a/bsnes/gameboy/cartridge/mmm01/mmm01.cpp b/bsnes/gameboy/cartridge/mmm01/mmm01.cpp
index 4ad9fae0..b690b8cf 100755
--- a/bsnes/gameboy/cartridge/mmm01/mmm01.cpp
+++ b/bsnes/gameboy/cartridge/mmm01/mmm01.cpp
@@ -1,19 +1,19 @@
 #ifdef CARTRIDGE_CPP
 
 uint8 Cartridge::MMM01::mmio_read(uint16 addr) {
-  if(within<0x0000, 0x7fff>(addr)) {
+  if((addr & 0x8000) == 0x0000) {  //$0000-7fff
     if(rom_mode == 0) return cartridge.rom_read(addr);
   }
 
-  if(within<0x0000, 0x3fff>(addr)) {
+  if((addr & 0xc000) == 0x0000) {  //$0000-3fff
     return cartridge.rom_read(0x8000 + (rom_base << 14) + (addr & 0x3fff));
   }
 
-  if(within<0x4000, 0x7fff>(addr)) {
+  if((addr & 0xc000) == 0x4000) {  //$4000-7fff
     return cartridge.rom_read(0x8000 + (rom_base << 14) + (rom_select << 14) + (addr & 0x3fff));
   }
 
-  if(within<0xa000, 0xbfff>(addr)) {
+  if((addr & 0xe000) == 0xa000) {  //$a000-bfff
     if(ram_enable) return cartridge.ram_read((ram_select << 13) + (addr & 0x1fff));
     return 0x00;
   }
@@ -22,7 +22,7 @@ uint8 Cartridge::MMM01::mmio_read(uint16 addr) {
 }
 
 void Cartridge::MMM01::mmio_write(uint16 addr, uint8 data) {
-  if(within<0x0000, 0x1fff>(addr)) {
+  if((addr & 0xe000) == 0x0000) {  //$0000-1fff
     if(rom_mode == 0) {
       rom_mode = 1;
     } else {
@@ -30,7 +30,7 @@ void Cartridge::MMM01::mmio_write(uint16 addr, uint8 data) {
     }
   }
 
-  if(within<0x2000, 0x3fff>(addr)) {
+  if((addr & 0xe000) == 0x2000) {  //$2000-3fff
     if(rom_mode == 0) {
       rom_base = data & 0x3f;
     } else {
@@ -38,17 +38,17 @@ void Cartridge::MMM01::mmio_write(uint16 addr, uint8 data) {
     }
   }
 
-  if(within<0x4000, 0x5fff>(addr)) {
+  if((addr & 0xe000) == 0x4000) {  //$4000-5fff
     if(rom_mode == 1) {
       ram_select = data;
     }
   }
 
-  if(within<0x6000, 0x7fff>(addr)) {
+  if((addr & 0xe000) == 0x6000) {  //$6000-7fff
     //unknown purpose
   }
 
-  if(within<0xa000, 0xbfff>(addr)) {
+  if((addr & 0xe000) == 0xa000) {  //$a000-bfff
     if(ram_enable) cartridge.ram_write((ram_select << 13) + (addr & 0x1fff), data);
   }
 }
diff --git a/bsnes/gameboy/cartridge/serialization.cpp b/bsnes/gameboy/cartridge/serialization.cpp
index 600d4d02..2f54262a 100755
--- a/bsnes/gameboy/cartridge/serialization.cpp
+++ b/bsnes/gameboy/cartridge/serialization.cpp
@@ -41,9 +41,10 @@ void Cartridge::serialize(serializer &s) {
   s.integer(mmm01.rom_select);
   s.integer(mmm01.ram_select);
 
-  s.integer(huc1.ram_enable);
+  s.integer(huc1.ram_writable);
   s.integer(huc1.rom_select);
   s.integer(huc1.ram_select);
+  s.integer(huc1.model);
 
   s.integer(huc3.ram_enable);
   s.integer(huc3.rom_select);
diff --git a/bsnes/gameboy/gameboy.hpp b/bsnes/gameboy/gameboy.hpp
index 01893319..b83c2328 100755
--- a/bsnes/gameboy/gameboy.hpp
+++ b/bsnes/gameboy/gameboy.hpp
@@ -69,12 +69,6 @@ namespace GameBoy {
   typedef uint_t<30> uint30;
   typedef uint_t<31> uint31;
 
-  template<uint16 lo, uint16 hi>
-  alwaysinline bool within(uint16 addr) {
-    static const uint16 mask = ~(hi ^ lo);
-    return (addr & mask) == lo;
-  }
-
   struct Processor {
     cothread_t thread;
     unsigned frequency;
diff --git a/bsnes/gameboy/lcd/cgb.cpp b/bsnes/gameboy/lcd/cgb.cpp
index c29230b3..31892ca3 100755
--- a/bsnes/gameboy/lcd/cgb.cpp
+++ b/bsnes/gameboy/lcd/cgb.cpp
@@ -140,7 +140,7 @@ void LCD::cgb_render_ob() {
     unsigned n = sprite[s] << 2;
     unsigned sy = oam[n + 0] - 16;
     unsigned sx = oam[n + 1] -  8;
-    unsigned tile = oam[n + 2];
+    unsigned tile = oam[n + 2] & ~status.ob_size;
     unsigned attr = oam[n + 3];
 
     sy = status.ly - sy;
diff --git a/bsnes/gameboy/lcd/dmg.cpp b/bsnes/gameboy/lcd/dmg.cpp
index d8e6d98e..dae518af 100755
--- a/bsnes/gameboy/lcd/dmg.cpp
+++ b/bsnes/gameboy/lcd/dmg.cpp
@@ -109,7 +109,7 @@ void LCD::dmg_render_ob() {
     unsigned n = sprite[s] << 2;
     unsigned sy = oam[n + 0] - 16;
     unsigned sx = oam[n + 1] -  8;
-    unsigned tile = oam[n + 2];
+    unsigned tile = oam[n + 2] & ~status.ob_size;
     unsigned attr = oam[n + 3];
 
     sy = status.ly - sy;
diff --git a/bsnes/ui/main.cpp b/bsnes/ui/main.cpp
index 76984cf4..e1fca9e7 100755
--- a/bsnes/ui/main.cpp
+++ b/bsnes/ui/main.cpp
@@ -27,7 +27,7 @@ void Application::run() {
 }
 
 Application::Application(int argc, char **argv) {
-  title = "bsnes v084.05";
+  title = "bsnes v084.06";
 
   application = this;
   quit = false;