diff --git a/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj b/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
index 569363dae2..fee0ff6fc6 100644
--- a/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
+++ b/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
@@ -754,6 +754,7 @@
+
diff --git a/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/UNIF/UNIF_BMC-810544-C-A1.cs b/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/UNIF/UNIF_BMC-810544-C-A1.cs
new file mode 100644
index 0000000000..4fb8e19e80
--- /dev/null
+++ b/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/UNIF/UNIF_BMC-810544-C-A1.cs
@@ -0,0 +1,62 @@
+using BizHawk.Common;
+using BizHawk.Common.NumberExtensions;
+
+namespace BizHawk.Emulation.Cores.Nintendo.NES
+{
+ public sealed class UNIF_BMC_810544_C_A1 : NES.NESBoardBase
+ {
+ private int latche;
+ private int prg_mask_32k, prg_mask_16k;
+
+ public override bool Configure(NES.EDetectionOrigin origin)
+ {
+ switch (Cart.board_type)
+ {
+ case "UNIF_BMC-810544-C-A1":
+ break;
+ default:
+ return false;
+ }
+
+ prg_mask_32k = Cart.prg_size / 32 - 1;
+ prg_mask_16k = Cart.prg_size / 16 - 1;
+
+ return true;
+ }
+
+ public override void SyncState(Serializer ser)
+ {
+ ser.Sync("latche", ref latche);
+ base.SyncState(ser);
+ }
+
+ public override void WritePRG(int addr, byte value)
+ {
+ latche = addr & 65535;
+ SetMirrorType(addr.Bit(3) ? EMirrorType.Vertical : EMirrorType.Horizontal);
+ }
+
+ public override byte ReadPRG(int addr)
+ {
+ int bank = latche >> 7;
+ if (latche.Bit(6))
+ {
+ return ROM[((bank & prg_mask_32k) << 15) + addr];
+ }
+
+ int bank16 = (bank << 1) | ((latche >> 5) & 1);
+ bank16 &= prg_mask_16k;
+ return ROM[(bank16 << 14) + (addr & 0x3FFF)];
+ }
+
+ public override byte ReadPPU(int addr)
+ {
+ if (addr < 0x2000)
+ {
+ return VROM[((latche & 0x0F) << 13) + addr];
+ }
+
+ return base.ReadPPU(addr);
+ }
+ }
+}