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When i try to enter in protected mode, doesn't work, why?
where i wrong?

the source is attached.

Hi,

I have not yet looked at your code, but what is "doesn't work"? Does the machine hang? Does it triple fault? What final register values are displayed on your emulator console? Are you even using an emulator?

Also, if there's relevant mode switching code, perhaps you could post that in code tags instead of the entire zip.

Cheers,
Adam

Hi,
I believe doing a triple fault, after the boot(kernel "loaded"), qemu restart it continuosly.

I use qemu for windows

Bochs has debugger and detailed log.