Interfere assembled into a problem in Windows 7?

Trouble merely by dont wanna put my name: problem with assembly interupt in windows 7?

im trying to program in assembly using nasm and minGW on an alienware m15x running windows 7 with a intel(R) core 15 cpu although the program will assemble and link when it runs it goes unresponsive and since it will run the rest of the code i think the problem is in the interupt

btw the interupt i using is int 21h

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Best answer:

Answer by Ratchetr

What interrupt are you issuing?

Answer by Love4Boobies

Hi,

In the beginning I will explain what the problem is, and then I will tell you the workarounds.

First of all, it’s “Core i5,” not “Core i7.” This is a 64-bit CPU. It’s likely that you have a 64-bit version of Windows 7—which is fundamentally incompatible with MS-DOS. The reason for that is that long mode, the 64-bit mode, does not have the vm8086 attribute for tasks, like protected mode does. To avoid having to implement the useless functionality via an emulator, Microsoft has decided to completely drop support for the old API (a good decision).

When executing the “int 21h” instruction, you will end up running whatever the IDT (Interrupt Descriptor Table) indicates; however, no not forget that PIC remapping is in the middle.

There are two solutions to your problem:

* Install DOSBox from http://www.dropbox.com/ (The preferred solution)

* Install an emulator (e.g., Bochs) or a VM (e.g., Virtual PC) and MS-DOS on top of it.

After that, just run your program from within that emulator/VM.

Cheers,

Bogdan

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Interfere assembled into a problem in Windows 7?