diff --git a/building/premake4.lua b/building/premake4.lua
index e3f50dd..bcef65b 100644
--- a/building/premake4.lua
+++ b/building/premake4.lua
@@ -9,7 +9,7 @@ solution "Z80"
 		flags {"ExtraWarnings"}
 		files {"../sources/**.c"}
 		includedirs {"../API/C"}
-		--buildoptions {"-std=c89 -pedantic"}
+		--buildoptions {"-std=c89 -pedantic -Wall"}
 
 		configuration "Release*"
 			targetdir "lib/release"
diff --git a/development/Xcode/Z80.xcodeproj/project.pbxproj b/development/Xcode/Z80.xcodeproj/project.pbxproj
index d0619ef..3890d09 100644
--- a/development/Xcode/Z80.xcodeproj/project.pbxproj
+++ b/development/Xcode/Z80.xcodeproj/project.pbxproj
@@ -280,11 +280,20 @@
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_ENABLE_MODULES = YES;
+				CLANG_WARN_ASSIGN_ENUM = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
 				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
 				CLANG_WARN_EMPTY_BODY = YES;
 				CLANG_WARN_ENUM_CONVERSION = YES;
+				CLANG_WARN_FLOAT_CONVERSION = YES;
+				CLANG_WARN_IMPLICIT_SIGN_CONVERSION = YES;
+				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
+				CLANG_WARN_SUSPICIOUS_IMPLICIT_CONVERSION = YES;
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				COPY_PHASE_STRIP = NO;
 				GCC_C_LANGUAGE_STANDARD = c99;
@@ -297,10 +306,22 @@
 					"$(inherited)",
 				);
 				GCC_SYMBOLS_PRIVATE_EXTERN = NO;
+				GCC_TREAT_IMPLICIT_FUNCTION_DECLARATIONS_AS_ERRORS = YES;
+				GCC_TREAT_INCOMPATIBLE_POINTER_TYPE_WARNINGS_AS_ERRORS = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
+				GCC_WARN_ABOUT_MISSING_FIELD_INITIALIZERS = YES;
+				GCC_WARN_ABOUT_MISSING_NEWLINE = YES;
+				GCC_WARN_ABOUT_MISSING_PROTOTYPES = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
+				GCC_WARN_FOUR_CHARACTER_CONSTANTS = YES;
+				GCC_WARN_INITIALIZER_NOT_FULLY_BRACKETED = YES;
+				GCC_WARN_SHADOW = YES;
+				GCC_WARN_SIGN_COMPARE = YES;
 				GCC_WARN_UNINITIALIZED_AUTOS = YES;
+				GCC_WARN_UNKNOWN_PRAGMAS = YES;
 				GCC_WARN_UNUSED_FUNCTION = YES;
+				GCC_WARN_UNUSED_LABEL = YES;
+				GCC_WARN_UNUSED_PARAMETER = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
 				HEADER_SEARCH_PATHS = (
 					"$(inherited)",
@@ -320,21 +341,42 @@
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_ENABLE_MODULES = YES;
+				CLANG_WARN_ASSIGN_ENUM = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
 				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
 				CLANG_WARN_EMPTY_BODY = YES;
 				CLANG_WARN_ENUM_CONVERSION = YES;
+				CLANG_WARN_FLOAT_CONVERSION = YES;
+				CLANG_WARN_IMPLICIT_SIGN_CONVERSION = YES;
+				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
+				CLANG_WARN_SUSPICIOUS_IMPLICIT_CONVERSION = YES;
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				COPY_PHASE_STRIP = YES;
 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
 				GCC_C_LANGUAGE_STANDARD = c99;
 				GCC_ENABLE_BUILTIN_FUNCTIONS = NO;
 				GCC_GENERATE_DEBUGGING_SYMBOLS = NO;
+				GCC_TREAT_IMPLICIT_FUNCTION_DECLARATIONS_AS_ERRORS = YES;
+				GCC_TREAT_INCOMPATIBLE_POINTER_TYPE_WARNINGS_AS_ERRORS = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
+				GCC_WARN_ABOUT_MISSING_FIELD_INITIALIZERS = YES;
+				GCC_WARN_ABOUT_MISSING_NEWLINE = YES;
+				GCC_WARN_ABOUT_MISSING_PROTOTYPES = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
+				GCC_WARN_FOUR_CHARACTER_CONSTANTS = YES;
+				GCC_WARN_INITIALIZER_NOT_FULLY_BRACKETED = YES;
+				GCC_WARN_SHADOW = YES;
+				GCC_WARN_SIGN_COMPARE = YES;
 				GCC_WARN_UNINITIALIZED_AUTOS = YES;
+				GCC_WARN_UNKNOWN_PRAGMAS = YES;
 				GCC_WARN_UNUSED_FUNCTION = YES;
+				GCC_WARN_UNUSED_LABEL = YES;
+				GCC_WARN_UNUSED_PARAMETER = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
 				HEADER_SEARCH_PATHS = (
 					"$(inherited)",