Assembly 需要从MASM转换为NASM

附件： 文件dosbox_003.png 5.722 KB 编写一个NASM，它将：

在一行上显示您的姓名。使用int 21h，函数9。回车符和换行符分别为0Dh和0Ah。 在下一行，再次使用int 21h，function9显示提示，并使用int 21h，fcn 1从键盘读取三个字符。将字符存储在适当标记的字节变量中。 打印三个字符，每行一个，具体取决于实现方式，可选择使用int 21h、函数9或函数2。 使用NASM组装程序并使用DOSBox执行

使用命令提示符组装

给定此代码，错误以粗体显示，线条突出显示 我有这些错误

C:\NASM>nasm bal-lab2.asm -o bal-lab2.com
bal-lab2.asm:5: error: attempt to define a local label before any non-local 
labels
bal-lab2.asm:5: error: parser: instruction expected
bal-lab2.asm:6: error: attempt to define a local label before any non-local 
labels
bal-lab2.asm:6: error: parser: instruction expected
bal-lab2.asm:7: warning: label alone on a line without a colon might be in 
error [-w+orphan-labels]
bal-lab2.asm:7: error: attempt to define a local label before any non-local 
labels
bal-lab2.asm:17: warning: label alone on a line without a colon might be in 
error [-w+orphan-labels]
bal-lab2.asm:18: error: parser: instruction expected
bal-lab2.asm:127: error: symbol `main' redefined
bal-lab2.asm:127: error: parser: instruction expected
bal-lab2.asm:128: error: parser: instruction expected

使用此代码

;ff
;ff
;ff

.model small line ***LINE 5***
.stack 100h ***LINE 6***
.data ***LINE 7***  
nameString db 'my name here $' ;replace by your name
prompt1 db 'Enter first character : $' ;ask for character
prompt2 db 'Enter second character : $' ;ask for character
prompt3 db 'Enter third character : $' ;ask for character

character1 DB ? ;memory to store character
character2 DB ? ;memory to store character
character3 DB ? ;memory to store character

.code ***LINE 17**
main proc ***LINE 18***


mov ax,@data ;move data address to ax
mov ds,ax ;move ax to data segment  


lea dx , nameString ;move content to dx

mov ah,9 ;ask to print array of string
int 21h

mov dx,10 ;print \n
mov ah,2
int 21h  

mov dx,13 ;cursor at first position
mov ah,2
int 21h

lea dx , prompt1 ;if use lea no need to use offset

mov ah,9 ;print prompt
int 21h  
;ask for character input
mov ah,1
int 21h

mov character1,al ; move to labled memory


mov dx,10 ;print \n
mov ah,2
int 21h  

mov dx,13 ;cursor at first position
mov ah,2
int 21h

lea dx , prompt2 ;if use lea no need to use offset

mov ah,9 ;print prompt
int 21h  
;ask for character input
mov ah,1
int 21h

mov character2,al ; move to labled memory


mov dx,10 ;print \n
mov ah,2
int 21h  

mov dx,13 ;cursor at first position
mov ah,2
int 21h

lea dx , prompt3 ;if use lea no need to use offset

mov ah,9 ;print prompt
int 21h  
;ask for character input
mov ah,1
int 21h

mov character3,al ; move to labled memory  


mov dx,10 ;print \n
mov ah,2
int 21h  

mov dx,13 ;cursor at first position
mov ah,2
int 21h

mov dl,character1 ;move character value to dl for print
mov ah,2
int 21h

mov dx,10 ;print \n
mov ah,2
int 21h  

mov dx,13 ;cursor at first position
mov ah,2
int 21h

mov dl,character2 ;move character value to dl for print
mov ah,2
int 21h


mov dx,10 ;print \n
mov ah,2
int 21h  

mov dx,13 ;cursor at first position
mov ah,2
int 21h

mov dl,character3 ;move character value to dl for print
mov ah,2
int 21h


mov ah,4ch
int 21h
main endp ***LINE 127***
end main ***LINE 128***

错误会高亮显示，线条也会高亮显示 谢谢你的帮助，我对汇编语言很陌生

删除程序的前7行并替换为org 0x100 将.data中的所有内容移动到文件末尾。COM文件中不需要节。 是否更改数据库的所有事件？至分贝0 拆除线路17至22 mov ax、@data和mov ds，不需要ax 你去过的每一个地方都换成了电影 是否更改角色的所有实例？到[字符？] 进行这些更改，您的程序就会工作，我使用DOSBox 0.74对其进行了测试，其输出如下所示

这是你的程序在修改为NASM和一些个人调整，如缩短标签

        org 256

        mov     dx, Nme         ;move content to dx

        mov     ah, 9       ;ask to print array of string
        int     21h

        mov     dx, 10      ;print \n
        mov     ah, 2
        int     21h  

        mov     dx, 13      ;cursor at first position
        mov     ah, 2
        int     21h

        mov     dx, prompt1     ;if use lea no need to use offset
        mov     ah, 9       ;print prompt
        int     21h  

        mov     ah, 1       ;ask for chr input
        int     21h
        mov     [chr1] ,al  ; move to labled memory

        mov     dx, 10      ;print \n
        mov     ah, 2
        int     21h  

        mov     dx, 13      ;cursor at first position
        mov     ah, 2
        int     21h

        mov     dx , prompt2    ;if use lea no need to use offset

        mov     ah, 9       ;print prompt
        int     21h  

        mov     ah,1        ;ask for chr input
        int     21h
        mov     [chr2], al  ; move to labled memory

        mov     dx, 10      ;print \n
        mov     ah, 2
        int     21h  

        mov     dx, 13      ;cursor at first position
        mov     ah,2
        int     21h

        mov     dx, prompt3     ;if use lea no need to use offset
        mov     ah, 9       ;print prompt
        int     21h

        mov     ah, 1
        int 21h
        mov     [chr3], al   ; move to labled memory 

        mov     dx, 10      ;print \n
        mov     ah, 2
        int     21h  

        mov     dx, 13      ;cursor at first position
        mov     ah, 2
        int     21h

        mov dl, [chr1]      ;move chr value to dl for print
        mov     ah, 2
        int 21h

        mov     dx, 10      ;print \n
        mov     ah, 2
        int     21h  

        mov     dx, 13      ;cursor at first position
        mov     ah, 2
        int     21h

        mov     dl, [chr2]  ;move chr value to dl for print
        mov     ah, 2
        int     21h

        mov     dx, 10      ;print \n
        mov ah, 2
        int     21h  

        mov     dx, 13      ;cursor at first position
        mov     ah, 2
        int     21h

        mov     dl, [chr3]  ;move chr value to dl for print
        mov     ah, 2
        int     21h

        mov ah,4ch
        int 21h

        Nme:        db  'my name here $' ;replace by your name
        prompt1:    db  'Enter  first chr: $' ;ask for chr
        prompt2:    db  'Enter second chr: $' ;ask for chr
        prompt3:    db  'Enter  third chr: $' ;ask for chr

        chr1:   DB 0    ;memory to store chr
        chr2:   DB 0    ;memory to store chr
        chr3:   DB 0    ;memory to store chr

---

您的代码似乎使用的是MASM语法，而不是NASM。NASM无法处理MASM语法。您需要使用MASM或类似于TASM甚至JWASM的兼容工具来组装此文件。否则，您必须将其转换为NASM语法。更改字符的所有实例是什么意思？到[character？]为止，我唯一的错误是mov字符1-3上的操作码和操作数组合无效，所有行都会替换1、2或3的问号。因此，您的character3需要更改为[character3]。与MASM不同，当您需要内存位置的内容时，需要将其括在括号中。当更改为[character？]时，我收到错误：无法识别的方向对不起，我应该澄清一下，错误是？替换为1-3，当没有[]时，我会收到错误，当我使用此@ArthurL声明时，我会收到无法识别的指令，声明仍然保留为character1 db 0，但当您要将内容移动到DL中时，则在该内存位置保存DL时将使用mov DL、[character1]或mov[character1]，DL。

        org 256

        mov     dx, Nme         ;move content to dx

        mov     ah, 9       ;ask to print array of string
        int     21h

        mov     dx, 10      ;print \n
        mov     ah, 2
        int     21h  

        mov     dx, 13      ;cursor at first position
        mov     ah, 2
        int     21h

        mov     dx, prompt1     ;if use lea no need to use offset
        mov     ah, 9       ;print prompt
        int     21h  

        mov     ah, 1       ;ask for chr input
        int     21h
        mov     [chr1] ,al  ; move to labled memory

        mov     dx, 10      ;print \n
        mov     ah, 2
        int     21h  

        mov     dx, 13      ;cursor at first position
        mov     ah, 2
        int     21h

        mov     dx , prompt2    ;if use lea no need to use offset

        mov     ah, 9       ;print prompt
        int     21h  

        mov     ah,1        ;ask for chr input
        int     21h
        mov     [chr2], al  ; move to labled memory

        mov     dx, 10      ;print \n
        mov     ah, 2
        int     21h  

        mov     dx, 13      ;cursor at first position
        mov     ah,2
        int     21h

        mov     dx, prompt3     ;if use lea no need to use offset
        mov     ah, 9       ;print prompt
        int     21h

        mov     ah, 1
        int 21h
        mov     [chr3], al   ; move to labled memory 

        mov     dx, 10      ;print \n
        mov     ah, 2
        int     21h  

        mov     dx, 13      ;cursor at first position
        mov     ah, 2
        int     21h

        mov dl, [chr1]      ;move chr value to dl for print
        mov     ah, 2
        int 21h

        mov     dx, 10      ;print \n
        mov     ah, 2
        int     21h  

        mov     dx, 13      ;cursor at first position
        mov     ah, 2
        int     21h

        mov     dl, [chr2]  ;move chr value to dl for print
        mov     ah, 2
        int     21h

        mov     dx, 10      ;print \n
        mov ah, 2
        int     21h  

        mov     dx, 13      ;cursor at first position
        mov     ah, 2
        int     21h

        mov     dl, [chr3]  ;move chr value to dl for print
        mov     ah, 2
        int     21h

        mov ah,4ch
        int 21h

        Nme:        db  'my name here $' ;replace by your name
        prompt1:    db  'Enter  first chr: $' ;ask for chr
        prompt2:    db  'Enter second chr: $' ;ask for chr
        prompt3:    db  'Enter  third chr: $' ;ask for chr

        chr1:   DB 0    ;memory to store chr
        chr2:   DB 0    ;memory to store chr
        chr3:   DB 0    ;memory to store chr