hello all, i am new for keil. i want to start all my 8051 programing in C. I want to know, what actually gets converted into assembly laguage when i use ready made c-function like printf(), scanf(), serinit(), getch(), putch(), getchr(), putchr(), etc.... if any one can help pls give rply..... any e-book or soft material or any links on this topic will be highly appreciated.
"when i use this functions, wat actually it configure in 8051 SFR, so on the basis of this i can configure my hardware."
You need to refer to the appropriate reference Manual for the compiler that you're using; in Keil's case, it is:
http://www.keil.com/support/man/docs/c51/c51_library.htm
"whether these function are costumizable to fullfill my hardware needs"
again, see the Library reference in the Manual; eg,
http://www.keil.com/support/man/docs/c51/c51_lib_source.htm