diff --git a/src/1_3.asm b/src/1_3.asm
new file mode 100644
index 0000000..5425e79
--- /dev/null
+++ b/src/1_3.asm
@@ -0,0 +1,13 @@
+    .CODE
+
+    option casemap:none     ; make all symbols case sensitive (like C)
+
+    public asm_func         ; make this visible outside of this source
+
+asm_func PROC ; start procedure
+    
+    ret
+
+asm_func ENDP ; end procedure
+        
+    END
\ No newline at end of file
diff --git a/src/1_3.exe b/src/1_3.exe
new file mode 100644
index 0000000..b64044c
Binary files /dev/null and b/src/1_3.exe differ
diff --git a/src/build.bat b/src/build.bat
index f618919..b97e77f 100644
--- a/src/build.bat
+++ b/src/build.bat
@@ -1,4 +1,9 @@
 @echo off
 echo ~~~~ starting build ~~~~
+
+REM /nolog is dont show MS info at run
+REM /c is compile dont link
+REM /Zi is debug info
+REM /Cp is preserve cases
 ml64 /nologo /c /Zi /Cp %1.asm
-cl /nologo /O2 /Zi /utf-8 /EHa /Fe%1.exe c.cpp %1.obj
\ No newline at end of file
+cl /nologo /O2 /Zi /utf-8 /EHa /Fe%1.exe main.cpp %1.obj
\ No newline at end of file
diff --git a/src/main.cpp b/src/main.cpp
index 51dad6d..976d773 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -2,12 +2,15 @@
 
 extern "C" 
 {
-    void asm_func(void);
-};
+    // Function written in ASM
+    void asm_func(void);    
+}
 
-int main(void) 
+int main() 
 {
-    printf("calling asm main\n");
+    printf("calling asm function\n");
     asm_func();
-    printf("return from asm main\n");
+    printf("returned from asm function\n");
+
+    return(0);
 }
\ No newline at end of file