AVR下的ICC所有函数库代码

				; make sure to assemble w/ -n flag, e.g.
				; iasavr -n crt...
				;
				; bootloader startup file, same as crtavr.s except that vectors are routed
				; to the bootloader section and use jmp for the vector
				;
					.include "area.s"
				
					.text
				__start::			; entry point
					; route vector
					ldi R16,1
					out 0x35,R16	; MCUCR = 1, unlock IVSEL
					ldi R16,2
					out 0x35,R16	; MCUCR = 2, set ivsel
				
					USE_ELPM = 0;
					.include "init.s"
				
				; call user main routine
					rcall _main
				_exit::
					rjmp	_exit
				
				; interrupt vectors. The first entry is the reset vector
				;
					.area vector(abs)
					.org 0
					jmp __start