NASM组件16位“操作码和操作数的无效组合" [英] NASM Assembly 16bit "invalid combination of opcode and operands"

问题描述

所以我试图编写一个程序来创建文件和我的名字. 但是我得到了操作码和操作数的无效组合" mov handle, ax，我不知道为什么. 我看到了此处，您可以做到那我为什么不能 预先感谢您的帮助.

So I'm trying to write a program that creates a file and my name in it. But I get the "invalid combination of opcode and operands" on the mov handle, ax, and I don't know why. I saw here that you can do it so why can't I. Thank you in advance for any help.

org 100h

mov ah, 3ch     ;create a file
mov dx, name    ;file name
mov cx, 0       
int 21h

mov handle, ax ; save handle

mov ah, 40h     ;write to file
mov bx, handle
mov cx, 1000    
mov dx, text    ; what to write
int 21h

mov ah, 3eh     ;close the file
mov bx, handle
int 21h


mov ax, 4C00h ; end 
int 21h

section .data
name db "name.txt", 0
text db "Michal",0ah,0dh,"$"

section .bss
handle resb 2

推荐答案

NASM需要方括号才能引用内存.正确的语法是mov [handle], ax. foo使用的是地址，而[foo]是的内容.您可能还会在其他地方将其混淆.

NASM Requires Square Brackets For Memory References. The correct syntax is mov [handle], ax. foo is using the address and [foo] is the content. You might have that mixed up elsewhere too.

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