--- /dev/null
+.include "macros.inc"
+
+start
+
+test_name OR_1
+mvi r1, 0
+mvi r2, 0
+or r3, r1, r2
+check_r3 0
+
+test_name OR_2
+mvi r1, 0
+mvi r2, 1
+or r3, r1, r2
+check_r3 1
+
+test_name OR_3
+mvi r1, 1
+mvi r2, 1
+or r3, r1, r2
+check_r3 1
+
+test_name OR_4
+mvi r1, 1
+mvi r2, 0
+or r3, r1, r2
+check_r3 1
+
+test_name OR_5
+load r1 0xaa55aa55
+load r2 0x55aa55aa
+or r3, r1, r2
+check_r3 0xffffffff
+
+test_name OR_6
+load r1 0xaa550000
+load r2 0x0000aa55
+or r3, r1, r2
+check_r3 0xaa55aa55
+
+test_name OR_7
+load r1 0xaa55aa55
+or r3, r1, r1
+check_r3 0xaa55aa55
+
+test_name OR_8
+load r3 0xaa55aa55
+or r3, r3, r3
+check_r3 0xaa55aa55
+
+end