Intel 80C51GB and LCD

I have big problem, i need to write program in C for using LCD on Intel
80C51GB.
I found some links at keil.com, but i am totally beginner of embedded
systems.
Could You help me by sending a link to block diagram with connection
between LCD and that microcontroller? and describe how it should work(
I do not understand<in some implementations> how stdio.h is connected
with lcd)?

http://www.8052.com/tutlcd.phtml

Here is a good starting point.

Eric

thank you:)