Add step 1 of assembler
diff --git a/CMakeLists.txt b/CMakeLists.txt
index cfb97fe..5a27b55 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,9 +3,12 @@
 project(6502 VERSION 0.1.0 LANGUAGES C)
 
 option(GEN_INSTRUCTIONS_HEADER ON)
+option(BUILD_ASSEMBLER ON)
 
 include_directories(nuklear)
 
+subdirs(as)
+
 if (${GEN_INSTRUCTIONS_HEADER})
 	add_custom_command(
 		OUTPUT instructions.h