Since couple of weeks, I have actually been studying Assembly Language Programming, today I mounted all the crucial applications come compile one assembly program.

I download DOSBox 0.74, NASM (Assembler), and AFD (Debugger). Ns mount the drive and also see my .asm files correctly. Yet when ns execute the adhering to command:

nasm firstprogram.asm -o firstprogram.com

it gives me the adhering to error: This program cannot be operation in dos mode

But once I translate in the record through command note (cmd) it compiles corrrectly and also then I have to go to DOSBox to operation AFD and debug the .com file.

Any idea why am I acquiring this error top top DOSBox?


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If you"re executing nasm within of DOSBox, then what happens is nice straightforward...

You are watching: Dosbox this program cannot be run in dos mode

You"ve been lied by compatibility layers!

If you view the details that the Portable Executable format (a.k.a: the internal layout of .exes, .dlls, and .coms (those last used to use the common Object document Format)), you"ll notification there"s something dubbed the MS-DOS stub header. It"s purpose is to display screen the post "This regime cannot be run in DOS mode" on 16-bit real mode operating systems, such together MS-DOS, as to inform the user the the program is not compatible v the oldish system.

This method that you"re to run a Windows nasm ~ above a MS-DOS (virtual) platform. Shot using the DOS binaries instead and you must be fine.


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You downloaded the variation that operation in Windows. When you open up a brochure of a details version, there room subdirectories for miscellaneous OS.

For example, here:https://www.nasm.us/pub/nasm/releasebuilds/2.12/

If friend download the one from /dos folder friend will be able to run it in DOSBox, yet if girlfriend download the one in /win32 folder, you will certainly only have the ability to run that from Windows.


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Probably you room doing so called console application. It operation on console, however requires windows 95 or never ever under the hood, largely for fat32 support.


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