问 程序如下
单步调试时，当运行到ret返回时，却返回到.org$0004，百思不解，请高人指点
.include "m16def.inc"


.org $0000
rjmp reset

.org $0004
rjmp main




.org $002A
reset:    ldi r16,high(ramend)
        ldi r17,low(ramend)
        out sph,r16
        out spl,r17
        call irq_init

main:    clr r16
    jmp main


irq_init:    ldi r16,(1<<isc10)
            out mcucsr,r16
            ldi r16,(1<<int1)
            out gicr,r16
            sei
            ret
答 1: 0004是int1的中断入口地址，是不是进入中断了