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What means this line in assembler?
__user_libspace: 0x10000AE0 ES813Bf3 ADD R3, R1, #0x0001CC00
instruction at the addr 0x10000AE0 called a ADD order to add value in R1 to R3 - but what about the #0x0001CC00?
Without specifying what architecture you are referring to, any answer can only be considered a guess.
Let me guess that you're referring to ARM assembly.
In that case, you can refer to any description of ARM assembly (for example the "Realview Compilation Tools Assembler Guide") and read up on the parameters of the ADD instruction.
"Let me guess that you're referring to ARM assembly."
And if that guess is wrong, you can find all the other manuals here, too:
http://www.keil.com/support/man/
ADD r0, r1, r2 ; r0 = r1 + r2,
R2 is no register, it is a address in the RAM, isn't it? If the RAM goes from 0x0000 0000 to 0x1000 0000
is that correct? and thanks for the hint...
R2 is no register, it is a address in the RAM, isn't it?
No, it is not. The ARM architecture is a load/store (also known as RISC) architecture, which means that data processing instructions cannot work with memory contents, but with registers and constants only.
R2, in this case, is a flexible second operand. What exactly that means is also explained in the ARM assembly docs.