diff --git a/CMakeLists.txt b/CMakeLists.txt
index bde16bb813..f29c3bdf20 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -103,34 +103,45 @@ list(INSERT CMAKE_MODULE_PATH 0 "${CMAKE_SOURCE_DIR}/cmake/Modules")
 # and is used in DLL names (jagamex86.dll, jagamex86.dylib, jagamei386.so).
 if(WIN32)
 	set(X86 ON)
-	if(CMAKE_SIZEOF_VOID_P MATCHES "8")
-		set(Architecture "x86_64")
-		set(WIN64 TRUE)
+	get_filename_component(ParentDir ${CMAKE_CURRENT_LIST_DIR} DIRECTORY)
+	# VCPKG default dir is this repository's sibling directory 'vcpkg'.
+	set(VcpkgDir "${ParentDir}/vcpkg" CACHE INTERNAL "")
+	if(DEFINED CMAKE_GENERATOR_PLATFORM AND NOT CMAKE_GENERATOR_PLATFORM STREQUAL "")
+		set(Architecture "${CMAKE_GENERATOR_PLATFORM}" CACHE INTERNAL "")
+		string(TOLOWER "${Architecture}" Architecture)
+	elseif(CMAKE_SIZEOF_VOID_P MATCHES "8")
+		set(Architecture "x86_64" CACHE INTERNAL "")
 	else()
-		set(Architecture "x86")
+		set(Architecture "x86" CACHE INTERNAL "")
+	endif()
+
+	if(Architecture STREQUAL "x86_64" OR Architecture STREQUAL "arm64")
+		set(WIN64 TRUE)
+	elseif(Architecture STREQUAL "x86")
 		set(WIN64 FALSE)
 	endif()
 else()
 	set(X86 OFF)
 	if(CMAKE_SYSTEM_PROCESSOR MATCHES "^arm")
-		set(Architecture "arm")
+		set(Architecture "arm" CACHE INTERNAL "")
 	elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^i.86$")
 		set(X86 ON)
 		if(APPLE)
-			set(Architecture "x86")
+			set(Architecture "x86" CACHE INTERNAL "")
 		else()
 			# e.g. Linux
-			set(Architecture "i386")
+			set(Architecture "i386" CACHE INTERNAL "")
 		endif()
 	elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^x86.64$")
 		set(X86 ON)
-		set(Architecture "x86_64")
+		set(Architecture "x86_64" CACHE INTERNAL "")
 	elseif(CMAKE_SYSTEM_PROCESSOR STREQUAL "powerpc")
-		set(Architecture "ppc")
+		set(Architecture "ppc" CACHE INTERNAL "")
 	elseif(CMAKE_SYSTEM_PROCESSOR STREQUAL "powerpc64")
-		set(Architecture "ppc64")
+		set(Architecture "ppc64" CACHE INTERNAL "")
 	else()
-		set(Architecture "${CMAKE_SYSTEM_PROCESSOR}")
+		set(Architecture "${CMAKE_SYSTEM_PROCESSOR}" CACHE INTERNAL "")
+		string(TOLOWER "${Architecture}" Architecture)
 	endif()
 endif()
 
diff --git a/code/CMakeLists.txt b/code/CMakeLists.txt
index 2c9e7f509f..9e24d45e20 100644
--- a/code/CMakeLists.txt
+++ b/code/CMakeLists.txt
@@ -71,18 +71,24 @@ if(BuildSPEngine OR BuildJK2SPEngine)
 	endif()
 
 	if(UseInternalSDL2)
-		if(CMAKE_SIZEOF_VOID_P EQUAL 4)
+		if(Architecture STREQUAL "x86")
 			set(SPEngineLibraries
 				${SPEngineLibraries}
 				${OpenJKLibDir}/SDL2/lib/x86/SDL2main.lib
 				${OpenJKLibDir}/SDL2/lib/x86/SDL2.lib
 				)
-		else()
+		elseif(Architecture STREQUAL "x86_64")
 			set(SPEngineLibraries
 				${SPEngineLibraries}
 				${OpenJKLibDir}/SDL2/lib/x64/SDL2main.lib
 				${OpenJKLibDir}/SDL2/lib/x64/SDL2.lib
 				)
+		elseif(Architecture STREQUAL "arm64")
+			set(SPEngineLibraries
+				${SPEngineLibraries}
+				${VcpkgDir}/installed/arm64-windows/lib/manual-link/SDL2main.lib
+				${VcpkgDir}/installed/arm64-windows/lib/SDL2.lib
+				)
 		endif()
 
 		set(SPEngineIncludeDirectories
@@ -387,14 +393,18 @@ if(BuildSPEngine OR BuildJK2SPEngine)
 		if(WIN32)
 			add_executable(${ProjectName} WIN32 ${SPEngineFiles})
 			if(UseInternalSDL2)
-				if(CMAKE_SIZEOF_VOID_P EQUAL 4)
+				if(Architecture STREQUAL "x86")
 					set(SPEngineExtraInstallFiles
 						${OpenJKLibDir}/SDL2/bin/x86/SDL2.dll
 						)
-				else()
+				elseif(Architecture STREQUAL "x86_64")
 					set(SPEngineExtraInstallFiles
 						${OpenJKLibDir}/SDL2/bin/x64/SDL2.dll
 						)
+				elseif(Architecture STREQUAL "arm64")
+					set(SPEngineExtraInstallFiles
+						${VcpkgDir}/installed/arm64-windows/bin/SDL2.dll
+						)
 				endif()
 			endif()
 		else(WIN32)
diff --git a/code/qcommon/timing.h b/code/qcommon/timing.h
index f608c2722a..8e472d74f0 100644
--- a/code/qcommon/timing.h
+++ b/code/qcommon/timing.h
@@ -38,7 +38,8 @@ class timing_c
 
 	void Start()
 	{
-#ifdef _WIN32
+
+#if defined(_WIN32) && !defined(_M_ARM64)
 		start = __rdtsc();
 #else
 		start = 0;
@@ -49,7 +50,7 @@ class timing_c
 	{
 		int time;
 
-#ifdef _WIN32
+#if defined(_WIN32) && !defined(_M_ARM64)
 		end = __rdtsc();
 #else
 		end = 0;
diff --git a/codemp/CMakeLists.txt b/codemp/CMakeLists.txt
index c10cabf7ab..c69e3f3c27 100644
--- a/codemp/CMakeLists.txt
+++ b/codemp/CMakeLists.txt
@@ -377,18 +377,24 @@ if(BuildMPEngine)
 	endif()
 
 	if(UseInternalSDL2)
-		if(CMAKE_SIZEOF_VOID_P EQUAL 4)
+		if(Architecture STREQUAL "x86")
 			set(MPEngineLibraries
 				${MPEngineLibraries}
 				${OpenJKLibDir}/SDL2/lib/x86/SDL2main.lib
 				${OpenJKLibDir}/SDL2/lib/x86/SDL2.lib
 				)
-		else()
+		elseif(Architecture STREQUAL "x86_64")
 			set(MPEngineLibraries
 				${MPEngineLibraries}
 				${OpenJKLibDir}/SDL2/lib/x64/SDL2main.lib
 				${OpenJKLibDir}/SDL2/lib/x64/SDL2.lib
 				)
+		elseif(Architecture STREQUAL "arm64")
+			set(MPEngineLibraries
+				${MPEngineLibraries}
+				${VcpkgDir}/installed/arm64-windows/lib/manual-link/SDL2main.lib
+				${VcpkgDir}/installed/arm64-windows/lib/SDL2.lib
+				)
 		endif()
 
 		set(MPEngineIncludeDirectories
@@ -564,14 +570,18 @@ if(BuildMPEngine)
 	if(WIN32)
 		add_executable(${MPEngine} WIN32 ${MPEngineFiles})
 		if(UseInternalSDL2)
-			if(CMAKE_SIZEOF_VOID_P EQUAL 4)
+			if(Architecture STREQUAL "x86")
 				set(MPEngineExtraInstallFiles
 					${OpenJKLibDir}/SDL2/bin/x86/SDL2.dll
 					)
-			else()
+			elseif(Architecture STREQUAL "x86_64")
 				set(MPEngineExtraInstallFiles
 					${OpenJKLibDir}/SDL2/bin/x64/SDL2.dll
 					)
+			elseif(Architecture STREQUAL "arm64")
+				set(MPEngineExtraInstallFiles
+					${VcpkgDir}/installed/arm64-windows/bin/SDL2.dll
+					)
 			endif()
 		endif()
 	else(WIN32)
diff --git a/codemp/qcommon/timing.h b/codemp/qcommon/timing.h
index 28ef999e94..eab22d94dd 100644
--- a/codemp/qcommon/timing.h
+++ b/codemp/qcommon/timing.h
@@ -39,7 +39,7 @@ class timing_c
 
 	void Start()
 	{
-#ifdef _WIN32
+#if defined(_WIN32) && !defined(_M_ARM64)
 		start = __rdtsc();
 #else
 		start = 0;
@@ -50,7 +50,7 @@ class timing_c
 	{
 		int64_t	time;
 
-#ifdef _WIN32
+#if defined(_WIN32) && !defined(_M_ARM64)
 		end = __rdtsc();
 #else
 		end = 0;