diff --git a/examples/hello.S b/examples/hello.S
index 0f7f952..b8e536c 100644
--- a/examples/hello.S
+++ b/examples/hello.S
@@ -1,8 +1,8 @@
-    li8 r1, 1
-    li8 r2, 1
-    lra16 r3, r0, hello_string
-    li8 r4, 0x11
-    eca
+    li8 r1, 1     ; 1->sys::write
+    li8 r2, 1     ; fildes=stdout
+    lra16 r3, r0, hello_string ; buf=hello_string
+    li8 r4, 0x11  ; nbyte=0x11
+    eca ; sys::write(stdout, hello_string, 0x11)
     tx
 hello_string:
     .db "Hello, AbleCorp!\n"