Thanks for your replies Erik and Jan,
Unfortunately I have to use AT89C52 micro controller for my I2C bus experiment. It is impossible to find P89C668 micro. or something like that micro. in Turkey. Actually I give thanks to God for existing 89C52 in Turkey :). Anyway, In the mehdi's code there is an error i think. I want to ask that Can I modify this code for listening the I2C bus to generate acknowkedge signal?

For instance, if micro. is calling to EEPROM to write something, and after the write bit sending, slave must give an acknowledge signal to the bus. At this time (by writing a suitable software) micro. can listen the bus and sampling the SDA and SCL lines it can decide whether the slave is ready or not.

If Salve is sending data to micro. micro can generate its own acknowledge sigal to the slave by software.

I think such as this logic can solve the problem. What do you think?

Thanks,
Batuhan