汇编学习-几条简单的汇编指令

#!/usr/bin/python3

# -*- coding: utf-8 -*-

__author__=‘sonwnja‘

exam_1=‘‘‘
(1) 写出每条汇编指令执行后相关寄存器中的值
mov ax,62627    AX=_____?
mov ah,31H      AX=_____?
mov al,23H      AX=_____?
add ax,ax       AX=_____?
mov bx,826cH    BX=_____?
mov cx,ax       CX=_____?
mov ax,bx       AX=_____?
add ax,bx       AX=_____?
mov al,bh       AX=_____?
mov ah,bl       AX=_____?
add ah,ah       AX=_____?
add al,6        AX=_____?
add al,al       AX=_____?
mov ax,cx       AX=_____?
‘‘‘
exam_2=‘‘‘
(2) 只能使用目前学过的汇编指令，最多使用4条指令，编程计算2的4次方。
‘‘‘
def exam1():
    print(exam_1)
    print("答案:")
    print(‘mov ax,62627    AX=%x‘ % 62627)
    
    ax=‘%x‘ % 62627
    ah=ax[-4:-2]
    al=ax[-2:]
    ah=0x31
    ah=‘%x‘ % ah
    ax=str(ah)+str(al)
    print(‘mov ah,31H      AX=%x‘ % int(int(ax,16)))
    
    al=0x23
    al=‘%x‘ % al
    ax=str(ah)+str(al)
    print(‘mov al,23H      AX=%x‘ % int(int(ax,16)) )
    
    ax=int(ax,16)+int(ax,16)
    print(‘add ax,ax       AX=%x‘ % ax)
    
    bx=0x826c
    print(‘mov bx,826cH    BX=%x‘ % bx)
    
    cx=ax
    print(‘mov cx,ax       CX=%x‘ % cx)
    
    ax=bx
    print(‘mov ax,bx       AX=%x‘ % ax)
    
    ax+=ax
    ax=‘%x‘ % ax
    ax=str(ax)[-4:]
    print(‘add ax,bx       AX=%s‘ % ax)
    
    ah=ax[-4:-2]
    al=ax[-2:]
    bx=‘%x‘ % bx
    bh=bx[-4:-2]
    al=bh
    ax=ah + str(al)
    print(‘mov al,bh       AX=%s‘ % ax)
    
    al=ax[-2:]
    bl=bx[-2:]
    ah=bl
    ax=ah + al
    print(‘mov ah,bl       AX=%s‘ % ax)
    
    
    ah=ax[-4:-2]
    al=ax[-2:]
    ah=int(ah,16)+int(ah,16)
    ax=(‘%x‘ % ah) + al
    print(‘add ah,ah       AX=%s‘ % ax)
    
    
    ah=ax[-4:-2]
    al=ax[-2:]
    al=int(al,16)+6
    al=‘%x‘ % al
    ax=ah + al
    print(‘add al,6        AX=%s‘ % ax)
    
    ah=ax[-4:-2]
    al=ax[-2:]
    al=int(al,16) + int(al,16)
    al=‘%x‘ % al
    al=al[-2:]
    ax=ah + al
    print(‘add al,al       AX=%s‘ % ax)
    
    ax=cx
    print(‘mov ax,cx       AX=%x‘ % ax)


def exam2():
    print(exam_2) 
    print("答案:")
    print(‘mov ax,2H‘)
    print(‘add al,al‘)
    print(‘add al,al‘)
    print(‘add al,al‘)
    ax=0x0002
    ax=‘%x‘ % ax
    print(‘AX=%s 十进制初始值是: %d‘ % (ax,int(ax,16)))
    print(‘经过这4条指令运算后‘)
    ah=‘00‘
    al=ax[-2:]
    al=int(al,16)+int(al,16) 
    al=al+al 
    al=al+al 
    ax=ah+(‘%x‘ % al)
    print(‘AX=%s 换成十进制后的结果: %d‘ % (ax,int(ax,16)))

exam1()
exam2()