Hi everybody I have a question about C_LIBCODE (LIBRARY ROUTINES). I have read the following in the document http://www.keil.com/support/docs/1958.htm ; "The Keil C compiler uses "helper" routines to perform operations where in-line code would cause program bloat" My question is, is there a way to disable the usage of this kind of "helper" routines. You see, I have a part of the code in which I need to have full control of all address references. But because of this calls to, in this case C_SCALLI, I can't do that. If you have read my earlier post, I have a specific part of the hex image on which I need to calculate a checksum. But this C_LIBCODE calls makes my checksum change from one build to another.