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i have created a sine wave in port1 for a at89c51

i m not able to see the output in logic analyser(graphic). my toolbox shows update window. i have seen my ports and all they aall r showing the correct output but that graphic display that my port1 pins are giving a sine wave toa dac is not being shown in graphic form.. i have searched all threads but thye talk bout delclaring some portxx etc..can anyone help me with specifcs after i have clicked run in debug menu.