thank you very much erik for the information.


erik malund wrote:
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I told you in my previous post what the problem is and once you understand how that '51 uses its memory it will be clear to you how to fix your problem.

yes your right, but as i told said, i,m doing the final exams as well as using this forum at least to get some help to understand what is the mistake and correct it, but to study "c51" know every single word about it infact your have final exams it might be comples :-).