diff --git a/asm/mov_test.as b/asm/mov_test.as
new file mode 100644
index 0000000..3b83abe
--- /dev/null
+++ b/asm/mov_test.as
@@ -0,0 +1,15 @@
+
+; mov h/l test.
+; Using 2 instructions to store a 16-bit words is abit tricky to write code for
+
+; Storing 32767 = (2^15) - 1 (highest value in 2's complement 16-bit).
+; MSB (signed flag) = 0, rest 1.
+; H [0111 1111] L [1111 1111]
+movl	$0x0, -1
+movh    $0x0, 127
+
+; Storing -32768 = (2^15) (highest value in 2's complement 16-bit).
+; MSB (signed flag) = 1, rest 0.
+; H [1000 0000] L [0000 0000]
+movl	$0x1, 0
+movh    $0x1, -128