Start work on preprocessor
diff --git a/as/test/test-abs-jump.s b/as/test/test-abs-jump.s
new file mode 100644
index 0000000..07441cc
--- /dev/null
+++ b/as/test/test-abs-jump.s
@@ -0,0 +1,16 @@
+;;; This program should test for a bug involving endianness.
+
+start:
+	lda #$FF
+	sta $200					; Put something on the screen, just to see
+	jmp second-pixel
+	brk
+
+second-pixel:
+	lda #$E0					; Red
+	sta $201
+	sta $220
+	sta $221					; Draw a box around the white pixel
+
+loop:							; Infinite loop
+	jmp loop