i have been working on rtc using 89c51 but couldnt finish it, if you did it with arduino, can u please send me the program n circuit details to abinjohnthomas@gmail.com

hi guys,
 am a beginner in arduino, my doubts will definitely be stupid but kindly help me

can i send a hexa decimal value or decimal to a port and view it through led?
the sample codes shows i have to configure each pin n send either high or low bit, i want to access the whole port throgh some commands like portB=H5f of watever, is it possible in an arduino uno?