【汇编】模拟loop指令

;安装程序 assume cs:code code segment start: mov ax,0 mov es,ax mov es:[7ch*4],200h mov es:[7ch*4+2],0 ;复制程序到0000:200h mov ax,0 mov es,ax mov di,200h mov ax,cs mov ds,ax mov si,offset myloop mov cx,offset myloopend - offset myloop cld rep movsb mov ax,4c00h int 21h ;7ch号中断例程 ;模拟loop指令 ;@param cx - 循环次数 ;@param bx - 位移地址 ;@return void myloop: push bp mov bp,sp dec cx jcxz mylooprtn add [bp+2],bx mylooprtn: pop bp iret myloopend: nop code ends end start ;示例程序 assume cs:code code segment start: mov ax,0 mov cx,2 mov bx, offset s - offset s1 s: inc ax int 7ch s1: nop mov ax,4c00h int 21h code ends end start