Question

我正在使用TASM 16位程序集处理项目，我似乎遇到了包含以下代码片段的循环问题：

assume cs:code,ds:code
code    segment
start:
    mov ah,1    ;read 1st digit from keyboard
    int 21h ;add it to register
    mov ch,10   ;prepare to multply by 10
    sub al,'0'  ;covert first digit to data from ascii
    mul ch  ;multiply first digit by 10
    mov dl,al   ;save digit to dl
    mov ah, 1   ;read second digit
    int 21h;    ;save it to al register
    sub al,'0'  ;convert second value from ascii
    add dl,al   ;add al to furst value for final desired result
    mov cl,2    ;set start point for squaring
reset:
    mov bh,0
    mov ch,0
    add bh,cl
code    ends
    end start

但在重置后添加标签会导致＆＃34;意外结束文件＆＃34;错误：

assume cs:code,ds:code
code    segment
start:  
    mov ah,1    ;read 1st digit from keyboard
    int 21h ;add it to register
    mov ch,10   ;prepare to multply by 10
    sub al,'0'  ;covert first digit to data from ascii
    mul ch  ;multiply first digit by 10
    mov dl,al   ;save digit to dl
    mov ah, 1   ;read second digit
    int 21h;    ;save it to al register 
    sub al,'0'  ;convert second value from ascii
    add dl,al   ;add al to furst value for final desired result
    mov cl,2    ;set start point for squaring
reset:
    mov bh,0
    mov ch,0    
loop1:
    add bh,cl
code    ends
    end start

Answer 1

我认为你的end start错位了。我很确定需要在code ends之前。让我想知道为什么在loop1:缺失时你没有收到错误。：）

Answer 2

想出来，我使用的模拟器存在一个问题，即复制/粘贴我在记事本中编写的代码导致模拟器发生故障。手动输入每一行解决了问题。

集会非法指令

2 个答案: