MASM32错误A2006，A2074错误及警告A4023 [英] MASM32 error A2006, error A2074 and warning A4023

问题描述

我是新来assmebly。我从书中我学习形式下面这段code的。我下载MASM32。我的电脑是64位的Win7。我试图建立以下code：

I am new to assmebly. I have the following piece of code from the book I am learning form. I downloaded MASM32. My computer is Win7 64bit. I tried to build the following code:

.model small
.stack 100h

.data
a dw 2
b dw 5
sum dw ?

.code
main proc
mov ax, @data
mov ds, ax

mov ax, a
add ax, b
mov sum, ax

mov ax, 4c00h
int 21h

main endp
 end main

不幸的是，我得到以下错误：

Unfortunately, I get the following errors:

Microsoft (R) Macro Assembler Version 6.14.8444
Copyright (C) Microsoft Corp 1981-1997.  All rights reserved.

 Assembling: C:\masm32\test.asm
C:\masm32\test.asm(11) : error A2006: undefined symbol : DGROUP
C:\masm32\test.asm(14) : error A2074: cannot access label through segment registers
C:\masm32\test.asm(15) : error A2074: cannot access label through segment registers
C:\masm32\test.asm(16) : error A2074: cannot access label through segment registers
C:\masm32\test.asm(22) : warning A4023: with /coff switch, leading underscore required for start address : main
_
Assembly Error
Press any key to continue . . .

我已搜查有关的解决方案。我可以解决错误A2074：通过添加 承担DS：_DATA 在。数据行。我把它从这个职位：<一href=\"http://stackoverflow.com/questions/1512734/cannot-access-label-through-segment-registers-error-in-assembly\">Cannot通过段寄存器，错误装配访问标号但遗憾的是，该解决方案不能提供的，为什么和这是什么解释？

I have searched about solutions. I could solve the error A2074: by adding ASSUME DS:_DATA before .data line. I took it from this post: Cannot access label through segment registers, error in assembly but unfortunately, the solution does not provide explanations of why and what is this ?

为什么这些错误出现，如何解决？我是一个新手，需要一些细节，一步一开始的一步。

Why these errors appear and how to solve them? I am a newbie and need some details and step by step at the beginning.

推荐答案

您需要使用16位Microsoft分段链接器链接16位DOS code，不附带MASM32，从MS下载增量链接：
16位Microsoft分段链接器5.60

You need to use the 16 bit Microsoft Segmented Linker to link 16 bit DOS code, NOT the Incremental Linker that comes with MASM32, download from MS: 16 bit Microsoft Segmented Linker 5.60

解压到一个目录，然后LINK.EXE重命名为类似link16.exe并将该到你的/ MASM32 / bin目录。您现在可以使用LINK16 16位DOS应用程序和链接32位应用程序。

Unzip to a directory then rename link.exe to something like link16.exe and place that into your /masm32/bin directory. You now can use link16 for 16 bit DOS apps and link for 32 bit apps.

您还需要使用正确的命令行参数来组装16位code，这里的例子：<一href=\"http://stackoverflow.com/questions/14692582/assembly-fatal-error-lnk1190-invalid-fixup-found-type-0x0001\">assembly致命错误LNK1190：发现无效的链接地址信息，类型×0001
当您使用的是64位操作系统，不能运行16位DOS应用程序本身了，你需要使用的仿真器。我使用 D-芬德重装上阵。

You also need to use the correct command line parameters to Assemble 16bit code, example here: assembly fatal error LNK1190: invalid fixup found, type 0x0001 As you are using a 64 bit OS, you cannot run a 16 bit DOS app natively anymore, you need to use an emulator. I use D-Fend Reloaded.

这篇关于MASM32错误A2006，A2074错误及警告A4023的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！