diff --git a/benchmark.png b/benchmark.png
index 309ce01..28cb57d 100644
Binary files a/benchmark.png and b/benchmark.png differ
diff --git a/benchmark/benchmark-stc0.sms.asm b/benchmark/benchmark-stc0.sms.asm
new file mode 100644
index 0000000..aa420fe
--- /dev/null
+++ b/benchmark/benchmark-stc0.sms.asm
@@ -0,0 +1,27 @@
+; { "technology": "Simple Tile Compression 0", "extension": "stc0compr" }
+
+.memorymap
+defaultslot 0
+slotsize $4000
+slot 0 $0000
+.endme
+
+.rombankmap
+bankstotal 1
+banksize $4000
+banks 1
+.endro
+
+.bank 0 slot 0
+
+.org 0
+	ld hl,data
+	ld de,$4000
+	call stc0_decompress
+	ret ; ends the test
+
+.block "decompressor"
+.include "../decompressors/stc0_decomp.asm"
+.endb
+
+data: .incbin "data.stc0compr"
diff --git a/compressors/gfxcomp_stc0.cpp b/compressors/gfxcomp_stc0.cpp
new file mode 100644
index 0000000..4590cc1
--- /dev/null
+++ b/compressors/gfxcomp_stc0.cpp
@@ -0,0 +1,123 @@
+#include <cstdint>
+
+extern "C" __declspec(dllexport) const char* getName()
+{
+    return "Simple Tile Compressor Zero";
+}
+
+extern "C" __declspec(dllexport) const char* getExt()
+{
+    return "stc0compr";
+}
+
+extern "C" __declspec(dllexport) int compressTiles(
+    const uint8_t* pSource,
+    const uint32_t numTiles,
+    uint8_t* pDestination,
+    const uint32_t destinationLength)
+{
+    if (destinationLength < numTiles * 40 + 1)
+    {
+        return 0;
+    }
+    // please give me more space for the data (up to 40 bytes per tile needed worst case scenario, plus 1 byte terminator)
+
+    uint8_t lastValue = 0;
+    uint8_t values[4];
+    int finalSize = 0;
+
+    for (unsigned int tileNumber = 0; tileNumber < numTiles; tileNumber++)
+    {
+        // loop over all tiles
+        for (unsigned char i = 0; i < 8; i++)
+        {
+            // loop over all the 8 rows of the tile
+            unsigned char mask = 0b00000000;
+            bool lastValid = false;
+            unsigned char valuesCount = 0;
+
+            if (pSource[0] == 0x00)
+            {
+                mask |= 0b10000000;
+            }
+            else if (pSource[0] == 0xFF)
+            {
+                mask |= 0b11000000;
+            }
+            else
+            {
+                mask |= 0b01000000; // raw
+                lastValid = true;
+                lastValue = pSource[0];
+                values[valuesCount++] = pSource[0];
+            }
+
+            if (pSource[1] == 0x00)
+            {
+                mask |= 0b00100000;
+            }
+            else if (pSource[1] == 0xFF)
+            {
+                mask |= 0b00110000;
+            }
+            else if (!lastValid ||
+                pSource[1] != lastValue)
+            {
+                mask |= 0b00010000; // raw
+                lastValid = true;
+                lastValue = pSource[1];
+                values[valuesCount++] = pSource[1];
+            }
+
+            if (pSource[2] == 0x00)
+            {
+                mask |= 0b00001000;
+            }
+            else if (pSource[2] == 0xFF)
+            {
+                mask |= 0b00001100;
+            }
+            else if (!lastValid ||
+                pSource[2] != lastValue)
+            {
+                mask |= 0b00000100; // raw
+                lastValid = true;
+                lastValue = pSource[2];
+                values[valuesCount++] = pSource[2];
+            }
+
+            if (pSource[3] == 0x00)
+            {
+                mask |= 0b00000010;
+            }
+            else if (pSource[3] == 0xFF)
+            {
+                mask |= 0b00000011;
+            }
+            else if (!lastValid ||
+                pSource[3] != lastValue)
+            {
+                mask |= 0b00000001; // raw
+                lastValid = true;
+                lastValue = pSource[3];
+                values[valuesCount++] = pSource[3];
+            }
+
+            *pDestination++ = mask; // write mask byte
+
+            for (unsigned char j = 0; j < valuesCount; j++)
+            {
+                *pDestination++ = values[j]; // dump uncompressed values
+            }
+
+            finalSize += 1 + valuesCount; // add this to finalSize
+
+            pSource += 4; // skip to next 4 bytes
+        }
+    }
+
+    *pDestination = 0x00; // end of data
+    finalSize++;
+
+    return finalSize; // report size to caller
+}
diff --git a/compressors/gfxcomp_stc0.vcxproj b/compressors/gfxcomp_stc0.vcxproj
new file mode 100644
index 0000000..b48ba3d
--- /dev/null
+++ b/compressors/gfxcomp_stc0.vcxproj
@@ -0,0 +1,87 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="gfxcomp_stc0.cpp" />
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{eb4e5423-ca2c-4020-8796-438e218ff0e0}</ProjectGuid>
+    <Keyword>Win32Proj</Keyword>
+    <WindowsTargetPlatformVersion>10.0</WindowsTargetPlatformVersion>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
+    <ConfigurationType>DynamicLibrary</ConfigurationType>
+    <PlatformToolset>v143</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
+    <ConfigurationType>DynamicLibrary</ConfigurationType>
+    <PlatformToolset>v143</PlatformToolset>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup>
+    <_ProjectFileVersion>11.0.60610.1</_ProjectFileVersion>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <IntDir>$(SolutionDir)$(Configuration)\$(ProjectName)\</IntDir>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <IntDir>$(SolutionDir)$(Configuration)\$(ProjectName)\</IntDir>
+  </PropertyGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_WINDOWS;_USRDLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <WarningLevel>Level4</WarningLevel>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <Optimization>Disabled</Optimization>
+      <RuntimeLibrary>MultiThreadedDebugDLL</RuntimeLibrary>
+      <MultiProcessorCompilation>true</MultiProcessorCompilation>
+    </ClCompile>
+    <Link>
+      <TargetMachine>MachineX86</TargetMachine>
+      <ImageHasSafeExceptionHandlers>false</ImageHasSafeExceptionHandlers>
+      <ImportLibrary>$(IntermediateOutputPath)$(TargetName).lib</ImportLibrary>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_WINDOWS;_USRDLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <WarningLevel>Level4</WarningLevel>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <WholeProgramOptimization>true</WholeProgramOptimization>
+      <MultiProcessorCompilation>true</MultiProcessorCompilation>
+    </ClCompile>
+    <Link>
+      <OptimizeReferences>true</OptimizeReferences>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <TargetMachine>MachineX86</TargetMachine>
+      <ImageHasSafeExceptionHandlers>false</ImageHasSafeExceptionHandlers>
+      <ImportLibrary>$(IntermediateOutputPath)$(TargetName).lib</ImportLibrary>
+      <SubSystem>Windows</SubSystem>
+      <LinkTimeCodeGeneration>UseFastLinkTimeCodeGeneration</LinkTimeCodeGeneration>
+      <TreatLinkerWarningAsErrors>true</TreatLinkerWarningAsErrors>
+    </Link>
+  </ItemDefinitionGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>
\ No newline at end of file
diff --git a/compressors/tilecompressordlls.sln b/compressors/tilecompressordlls.sln
index d91887a..7e3610f 100644
--- a/compressors/tilecompressordlls.sln
+++ b/compressors/tilecompressordlls.sln
@@ -1,6 +1,6 @@
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio Version 16
-VisualStudioVersion = 16.0.30225.117
+# Visual Studio Version 17
+VisualStudioVersion = 17.3.32811.315
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "gfxcomp_phantasystar", "gfxcomp_phantasystar.vcxproj", "{CDDC9081-7930-454C-A887-B72BDFE9DE93}"
 EndProject
@@ -52,140 +52,102 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution
 		.editorconfig = .editorconfig
 	EndProjectSection
 EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "gfxcomp_stc0", "gfxcomp_stc0.vcxproj", "{EB4E5423-CA2C-4020-8796-438E218FF0E0}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
-		Debug|x64 = Debug|x64
 		Debug|x86 = Debug|x86
-		Release|x64 = Release|x64
 		Release|x86 = Release|x86
 	EndGlobalSection
 	GlobalSection(ProjectConfigurationPlatforms) = postSolution
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diff --git a/decompressors/stc0_decomp.asm b/decompressors/stc0_decomp.asm
new file mode 100644
index 0000000..b47abac
--- /dev/null
+++ b/decompressors/stc0_decomp.asm
@@ -0,0 +1,66 @@
+;~
+;~ STC0 simple tile compression zero (uses no RAM)
+;~
+;~ one byte holds information on how to create the next 4 bytes, two bits for each:
+;~
+;~     D7 D6          D5 D4            D3 D2          D1 D0
+;~
+;~    1st byte       2nd byte         3rd byte       4th byte
+;~
+;~
+;~ 0b10 -> write value 0x00
+;~ 0b11 -> value 0xFF
+;~ 0b01 -> uncompressed (data byte follows)
+;~ 0b00 -> same uncompressed byte as the previous one (in this set of 4) OR end of stream if this is the first two bits (setting the whole byte to 0x00 works fine as EOD)
+;~
+
+;~  IN:
+;~      HL (data source address)
+;~      DE (destination in VRAM w/flags)
+;~  clobbers:
+;~      AF,BC,DE,HL
+;~
+
+stc0_decompress:
+  ld c,$bf                            ; VDP_CTRL_PORT
+  di
+  out (c),e
+  out (c),d
+  ei
+  dec c                               ; same as ld c,VDP_DATA_PORT_ADDRESS
+  ld de,$00FF                         ; D = $00, E = $FF
+
+_stc0_decompress_outer_loop:
+  ld b,4
+  ld a,(hl)
+  inc hl
+
+_stc0_decompress_inner_loop:
+  rla
+  jr c,_compressed_byte               ; if 1X found, write $00 or $FF
+  rla
+  jr nc,_same_byte_or_leave
+  outi                                ; write raw byte
+  jr nz,_stc0_decompress_inner_loop
+  jp _stc0_decompress_outer_loop
+
+_same_byte_or_leave:
+  bit 2,b
+  ret nz                              ; 00 found in first 2 bits -> end of data, leave
+  dec hl
+  outi                                ; write same raw byte again
+  jr nz,_stc0_decompress_inner_loop
+  jp _stc0_decompress_outer_loop
+
+_compressed_byte:
+  rla
+  jr c,_compressed_FF
+  out (c),d                           ; write $00
+  djnz _stc0_decompress_inner_loop
+  jp _stc0_decompress_outer_loop
+
+_compressed_FF:
+  out (c),e                           ; write $FF
+  djnz _stc0_decompress_inner_loop
+  jp _stc0_decompress_outer_loop
+