diff --git a/BizHawk.Emulation/BizHawk.Emulation.csproj b/BizHawk.Emulation/BizHawk.Emulation.csproj
index c469bf327b..25aaead3dc 100644
--- a/BizHawk.Emulation/BizHawk.Emulation.csproj
+++ b/BizHawk.Emulation/BizHawk.Emulation.csproj
@@ -140,6 +140,7 @@
+
diff --git a/BizHawk.Emulation/Consoles/Nintendo/Docs/compatibility.txt b/BizHawk.Emulation/Consoles/Nintendo/Docs/compatibility.txt
index 90c5852171..0042995705 100644
--- a/BizHawk.Emulation/Consoles/Nintendo/Docs/compatibility.txt
+++ b/BizHawk.Emulation/Consoles/Nintendo/Docs/compatibility.txt
@@ -113,7 +113,7 @@ Open bus and bus conflict emulation is not considered complete or thorough in an
210 Namcot Decent {{See 019}}
225 Multicart Junk
226 Multicart Junk
-227 Multicart Junk
+227 Multicart Decebt
228 Unlicensed Nothing
230 Multicart Junk
231 Multicart Junk
diff --git a/BizHawk.Emulation/Consoles/Nintendo/NES/Boards/Mapper227.cs b/BizHawk.Emulation/Consoles/Nintendo/NES/Boards/Mapper227.cs
new file mode 100644
index 0000000000..7f95e03db1
--- /dev/null
+++ b/BizHawk.Emulation/Consoles/Nintendo/NES/Boards/Mapper227.cs
@@ -0,0 +1,121 @@
+using System;
+using System.IO;
+using System.Diagnostics;
+
+namespace BizHawk.Emulation.Consoles.Nintendo
+{
+ class Mapper227 : NES.NESBoardBase
+ {
+ //configuration
+ int prg_bank_mask_16k;
+
+ //state
+ int prg;
+ bool vram_protected;
+ ByteBuffer prg_banks_16k = new ByteBuffer(2);
+
+ //1200-in-1
+ //[NJXXX] Xiang Shuai Chuan Qi
+
+ public override bool Configure(NES.EDetectionOrigin origin)
+ {
+ //configure
+ switch (Cart.board_type)
+ {
+ case "MAPPER227":
+ //AssertVram(16);
+ Cart.vram_size = 16;
+ break;
+ default:
+ return false;
+ }
+ prg_bank_mask_16k = (Cart.prg_size / 16) - 1;
+
+ SetMirrorType(EMirrorType.Vertical);
+ vram_protected = false;
+ prg_banks_16k[0] = prg_banks_16k[1] = 0;
+ return true;
+ }
+
+ public override byte ReadPRG(int addr)
+ {
+ int bank_16k = addr >> 14;
+ int ofs = addr & ((1 << 14) - 1);
+ bank_16k = prg_banks_16k[bank_16k];
+ bank_16k &= prg_bank_mask_16k;
+ addr = (bank_16k << 14) | ofs;
+ return ROM[addr];
+ }
+
+ public override void WritePRG(int addr, byte value)
+ {
+ bool S = addr.Bit(0);
+ bool M_horz = addr.Bit(1);
+ int p = (addr >> 2) & 0x1F;
+ p += addr.Bit(8) ? 0x20 : 0;
+ bool o = addr.Bit(7);
+ bool L = addr.Bit(9);
+
+ //virtuaNES doesnt do this.
+ //fceux does it...
+ //if we do it, [NJXXX] Xiang Shuai Chuan Qi will not be able to set any patterns
+ //maybe only the multicarts do it, to keep the game from clobbering vram on accident
+ //vram_protected = o;
+
+ if (o == true && S == false)
+ {
+ prg_banks_16k[0] = (byte)(p);
+ prg_banks_16k[1] = (byte)(p);
+ }
+ if (o == true && S == true)
+ {
+ prg_banks_16k[0] = (byte)((p & ~1));
+ prg_banks_16k[1] = (byte)((p & ~1) + 1);
+ }
+ if (o == false && S == false && L == false)
+ {
+ prg_banks_16k[0] = (byte)p;
+ prg_banks_16k[1] = (byte)(p & 0x38);
+ }
+ if (o == false && S == true && L == false)
+ {
+ prg_banks_16k[0] = (byte)(p & 0x3E);
+ prg_banks_16k[1] = (byte)(p & 0x38);
+ }
+ if (o == false && S == false && L == true)
+ {
+ prg_banks_16k[0] = (byte)p;
+ prg_banks_16k[1] = (byte)(p | 0x07);
+ }
+ if (o == false && S == true && L == true)
+ {
+ prg_banks_16k[0] = (byte)(p & 0x3E);
+ prg_banks_16k[1] = (byte)(p | 0x07);
+ }
+
+ prg_banks_16k[0] = (byte)(prg_banks_16k[0]&prg_bank_mask_16k);
+ prg_banks_16k[1] = (byte)(prg_banks_16k[1]&prg_bank_mask_16k);
+
+ if (M_horz) SetMirrorType(EMirrorType.Horizontal);
+ else SetMirrorType(EMirrorType.Vertical);
+ }
+
+
+ public override void WritePPU(int addr, byte value)
+ {
+ if (addr < 0x2000)
+ {
+ if (vram_protected)
+ return;
+ else base.WritePPU(addr, value);
+ }
+ else base.WritePPU(addr, value);
+ }
+
+ public override void SyncState(Serializer ser)
+ {
+ base.SyncState(ser);
+ ser.Sync("prg", ref prg);
+ }
+ }
+}
diff --git a/BizHawk.Emulation/Consoles/Nintendo/NES/iNES.cs b/BizHawk.Emulation/Consoles/Nintendo/NES/iNES.cs
index 4ed84609c7..883f380140 100644
--- a/BizHawk.Emulation/Consoles/Nintendo/NES/iNES.cs
+++ b/BizHawk.Emulation/Consoles/Nintendo/NES/iNES.cs
@@ -114,6 +114,7 @@ static string ClassifyTable = @"
191 -1 -1 -1 -1 MAPPER191
193 -1 -1 -1 -1 MAPPER193
210 -1 -1 -1 -1 MAPPER210
+227 -1 -1 -1 -1 MAPPER227
232 -1 -1 -1 -1 MAPPER232
240 -1 -1 -1 -1 MAPPER240
242 -1 -1 -1 -1 MAPPER242
diff --git a/BizHawk.Emulation/Database/Database.cs b/BizHawk.Emulation/Database/Database.cs
index 8cfa1bf66e..7cc04453a3 100644
--- a/BizHawk.Emulation/Database/Database.cs
+++ b/BizHawk.Emulation/Database/Database.cs
@@ -82,6 +82,7 @@ namespace BizHawk
case "I": Game.Status = RomStatus.BIOS; break;
case "D": Game.Status = RomStatus.Homebrew; break;
case "H": Game.Status = RomStatus.Hack; break;
+ case "U": Game.Status = RomStatus.Unknown; break;
default: Game.Status = RomStatus.GoodDump; break;
}
Game.Name = items[2];
diff --git a/BizHawk.Emulation/Database/GameInfo.cs b/BizHawk.Emulation/Database/GameInfo.cs
index 5ac0570d2b..1074e31555 100644
--- a/BizHawk.Emulation/Database/GameInfo.cs
+++ b/BizHawk.Emulation/Database/GameInfo.cs
@@ -10,6 +10,7 @@ namespace BizHawk
Homebrew,
TranslatedRom,
Hack,
+ Unknown,
BIOS,
Overdump,
NotInDatabase
@@ -17,6 +18,11 @@ namespace BizHawk
public class GameInfo
{
+ public bool IsRomStatusBad()
+ {
+ return Status == RomStatus.BadDump || Status == RomStatus.Overdump;
+ }
+
public string Name;
public string System;
public string Hash;