If I have the address of particular function, is it possible load the function in assembly? I understand that usually the function is loaded as LCALL _function but I was wondering whether it is possible to load the function with its address? Appreciate anyone who can offer me advise on this. Thank you.
whether it is possible to load the function with its address? Your terminology is somewhat strange. What you're doing here is usually referred as "calling" a function", not "loading" it. That set aside, it's completely unclear what it is you want to do. Note that _function is the address of that function, effectively --- _function is just a more convenient way the assembler and tools allow you to write it.