diff --git a/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj b/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
index afd021186b..f8495cb4df 100644
--- a/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
+++ b/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
@@ -768,6 +768,7 @@
+
diff --git a/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/UNIF/UNIF_UNL-AC08.cs b/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/UNIF/UNIF_UNL-AC08.cs
new file mode 100644
index 0000000000..8d391e2a5d
--- /dev/null
+++ b/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/UNIF/UNIF_UNL-AC08.cs
@@ -0,0 +1,61 @@
+using BizHawk.Common;
+using BizHawk.Common.NumberExtensions;
+
+namespace BizHawk.Emulation.Cores.Nintendo.NES
+{
+ public sealed class UNIF_UNL_AC08 : NES.NESBoardBase
+ {
+ private int reg;
+
+ public override bool Configure(NES.EDetectionOrigin origin)
+ {
+ switch (Cart.board_type)
+ {
+ case "UNIF_UNL-AC08":
+ break;
+ default:
+ return false;
+ }
+
+ return true;
+ }
+
+ public override void SyncState(Serializer ser)
+ {
+ ser.Sync("reg", ref reg);
+ base.SyncState(ser);
+ }
+
+ public override void WriteEXP(int addr, byte value)
+ {
+ if (addr == 0x25)
+ {
+ SetMirrorType(value.Bit(3) ? EMirrorType.Horizontal : EMirrorType.Vertical);
+ }
+
+ base.WriteEXP(addr, value);
+ }
+
+ public override void WritePRG(int addr, byte value)
+ {
+ if (addr == 1)
+ {
+ reg = (value >> 1) & 0x0F;
+ }
+ else
+ {
+ reg = value & 0x0F;
+ }
+ }
+
+ public override byte ReadWRAM(int addr)
+ {
+ return ROM[(reg << 13) + addr];
+ }
+
+ public override byte ReadPRG(int addr)
+ {
+ return ROM[0x20000 + addr];
+ }
+ }
+}