+ let data = String.make 0x800 '\004' in
+ let mem = add_string mem data 0x1000L in
+ let data = String.make 0x800 '\005' in
+ let mem = add_string mem data 0x2800L in
+ let data = String.make 1 '\006' in
+ let mem = add_string mem data 0L in
+ let data = "hello, world!\000" in
+ let mem = add_string mem data 0x20L in