diff --git a/code/v20/CMakeLists.txt b/code/v20/CMakeLists.txt
new file mode 100644
index 0000000..7918205
--- /dev/null
+++ b/code/v20/CMakeLists.txt
@@ -0,0 +1,34 @@
+cmake_minimum_required(VERSION 3.7)
+
+# set the project name
+project(pi86 VERSION 1.0)
+
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED True)
+
+set(CMAKE_BUILD_TYPE Debug)
+
+set(CMAKE_POSITION_INDEPENDENT_CODE ON)
+
+add_executable(pi86
+	#	cga.cpp
+	drives.cpp
+	pi86.cpp
+	timer.cpp
+	vga.cpp
+	x86.cpp
+)
+
+set(CMAKE_THREAD_PREFER_PTHREAD TRUE)
+set(THREADS_PREFER_PTHREAD_FLAG TRUE)
+find_package(Threads)
+target_link_libraries(pi86 Threads::Threads)
+
+include(FindPkgConfig)
+
+pkg_check_modules(LIBSDL2 sdl2)
+target_link_libraries(pi86 ${LIBSDL2_LIBRARIES})
+target_include_directories(pi86 PUBLIC ${LIBSDL2_INCLUDE_DIRS})
+target_compile_options(pi86 PUBLIC ${LIBSDL2_CFLAGS_OTHER})
+
+target_link_libraries(pi86 -lwiringPi)
diff --git a/code/v20/cga.cpp b/code/v20/cga.cpp
index 0fdea7a..47acaa1 100644
--- a/code/v20/cga.cpp
+++ b/code/v20/cga.cpp
@@ -81,7 +81,7 @@ void Text_Mode_80x25(SDL_Renderer *Renderer, char* Video_Memory, char* Cursor_Po
 	
 }
 
-void print_pixs_mode4_palette_0(SDL_Renderer *Renderer, int x, int y, unsigned char Ascii_value)
+static void print_pixs_mode4_palette_0(SDL_Renderer *Renderer, int x, int y, unsigned char Ascii_value)
 {
 	for (int i = 0; i < 4; i++)
 	{
@@ -109,7 +109,7 @@ void print_pixs_mode4_palette_0(SDL_Renderer *Renderer, int x, int y, unsigned c
 	}	
 }
 
-void Graphics_Mode_320_200_Palette_0(SDL_Renderer *Renderer, char* Video_Memory)
+static void Graphics_Mode_320_200_Palette_0(SDL_Renderer *Renderer, char* Video_Memory)
 {
 			int index = 0; 				
 			for (int j = 0; j < 100; j++)
diff --git a/code/v20/cga.h b/code/v20/cga.h
index e898465..6f38151 100644
--- a/code/v20/cga.h
+++ b/code/v20/cga.h
@@ -1,7 +1,7 @@
 #ifndef CGA_H
 #define CGA_H
 
-#include "SDL.h"
+#include <SDL.h>
 #include "font.h"
 
 using namespace std;
diff --git a/code/v20/pi86 b/code/v20/pi86
deleted file mode 100644
index dd413b4..0000000
Binary files a/code/v20/pi86 and /dev/null differ
diff --git a/code/v20/vga.cpp b/code/v20/vga.cpp
index 03de8d3..419f20e 100644
--- a/code/v20/vga.cpp
+++ b/code/v20/vga.cpp
@@ -72,7 +72,7 @@ void Mode_2_80x25(SDL_Renderer *Renderer, char* Video_Memory, char* Cursor_Posit
 }
 
 
-void print_pixs_mode4_palette_0(SDL_Renderer *Renderer, int x, int y, unsigned char Ascii_value)
+static void print_pixs_mode4_palette_0(SDL_Renderer *Renderer, int x, int y, unsigned char Ascii_value)
 {
 	for (int i = 0; i < 4; i++)
 	{