i wrote most most of the program already. But i do not know how to use TH0, TH1, TL0, TL1 cause we were not taught how to use it. and also we do not know which tmod to use.

Regarding the real time clock that is available, i do not quite understand the program coz... some commands i never see before.

i just started learning 8051 2 months ago as part of my subject in school.