diff --git a/Core/Core.vcxproj b/Core/Core.vcxproj
index 0aa42607..04c0b73f 100644
--- a/Core/Core.vcxproj
+++ b/Core/Core.vcxproj
@@ -446,6 +446,7 @@
     <ClInclude Include="CrossFeedFilter.h" />
     <ClInclude Include="GoldenFive.h" />
     <ClInclude Include="MesenMovie.h" />
+    <ClInclude Include="SealieComputing.h" />
     <ClInclude Include="UnlD1038.h" />
     <ClInclude Include="DaouInfosys.h" />
     <ClInclude Include="DebugBreakHelper.h" />
diff --git a/Core/Core.vcxproj.filters b/Core/Core.vcxproj.filters
index 37686575..22787dfb 100644
--- a/Core/Core.vcxproj.filters
+++ b/Core/Core.vcxproj.filters
@@ -1150,6 +1150,9 @@
     <ClInclude Include="UnRom512.h">
       <Filter>Nes\Mappers</Filter>
     </ClInclude>
+    <ClInclude Include="SealieComputing.h">
+      <Filter>Nes\Mappers</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="stdafx.cpp">
diff --git a/Core/MapperFactory.cpp b/Core/MapperFactory.cpp
index abed0582..203942b8 100644
--- a/Core/MapperFactory.cpp
+++ b/Core/MapperFactory.cpp
@@ -197,6 +197,7 @@
 #include "Sachen74LS374N.h"
 #include "Sachen74LS374NB.h"
 #include "Sachen8259.h"
+#include "SealieComputing.h"
 #include "Smb2j.h"
 #include "StudyBox.h"
 #include "Subor166.h"
@@ -248,7 +249,7 @@ Supported mappers:
 ??? : No known roms
 -----------------------------------------------------------------
 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10| 11| 12| 13| 14| 15|
-| 16| 17| 18| 19|...| 21| 22| 23| 24| 25| 26| 27| 28|   | 30| 31|
+| 16| 17| 18| 19|...| 21| 22| 23| 24| 25| 26| 27| 28| 29| 30| 31|
 | 32| 33| 34| 35| 36| 37| 38|---| 40| 41| 42| 43| 44| 45| 46| 47|
 | 48| 49| 50| 51| 52| 53| 54|???| 56| 57| 58|===| 60| 61| 62| 63|
 | 64| 65| 66| 67| 68| 69| 70| 71| 72| 73| 74| 75| 76| 77| 78| 79|
@@ -301,6 +302,7 @@ BaseMapper* MapperFactory::GetMapperFromID(RomData &romData)
 		case 26: return new VRC6(VRCVariant::VRC6b);
 		case 27: return new VRC2_4();
 		case 28: return new Action53();
+		case 29: return new SealieComputing();
 		case 30: return new UnRom512();
 		case 31: return new NsfCart31();
 		case 32: return new IremG101();
diff --git a/Core/SealieComputing.h b/Core/SealieComputing.h
new file mode 100644
index 00000000..bbeaa709
--- /dev/null
+++ b/Core/SealieComputing.h
@@ -0,0 +1,31 @@
+#pragma once
+#include "stdafx.h"
+#include "BaseMapper.h"
+
+class SealieComputing : public BaseMapper
+{
+protected:
+	uint16_t GetPRGPageSize() override { return 0x4000; }
+	uint16_t GetCHRPageSize() override { return 0x2000; }
+	uint32_t GetWorkRamSize() override { return 0x2000; }
+	uint32_t GetChrRamSize() override { return 0x8000; }
+	uint16_t RegisterStartAddress() override { return 0x8000; }
+	uint16_t RegisterEndAddress() override { return 0xFFFF; }
+
+	void InitMapper() override
+	{
+		SelectPRGPage(1, -1);
+
+		//"It is hard-wired for vertical mirroring", but no need to enforce this, just need proper iNES headers.
+		//SetMirroringType(MirroringType::Vertical);
+
+		//"contains 8KB of WRAM mounted in the usual place"
+		SetCpuMemoryMapping(0x6000, 0x7FFF, 0, PrgMemoryType::WorkRam, MemoryAccessType::ReadWrite);
+	}
+
+	void WriteRegister(uint16_t addr, uint8_t value) override
+	{
+		SelectCHRPage(0, value & 0x03);
+		SelectPRGPage(0, (value >> 2) & 0x07);
+	}
+};
\ No newline at end of file