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https://github.com/phire/kvmbox.git
synced 2025-04-02 10:52:56 -04:00
34 lines
481 B
NASM
34 lines
481 B
NASM
[bits 32]
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hlt
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[bits 16]
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start:
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cli
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mov dx, cs
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mov ds, dx
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lgdt [gdtr]
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mov eax, cr0
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or al, 1
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mov cr0, eax
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jmp long 0x8:0xf0000+protected
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[bits 32]
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protected:
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jmp 0x8:0x000001bc
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db 0x90,0x90,0x90
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align 16
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gdtr:
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dw 0x18
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dd gdt + 0xf0000
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align 16
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gdt:
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db 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
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db 0xff, 0xff, 0x00, 0x00, 0x00, 0x9a, 0xcf, 0x00
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db 0xff, 0xff, 0x00, 0x00, 0x00, 0x92, 0xcf, 0x00
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[bits 16]
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times 0xfff0-($-$$) db 0x90
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jmp word 0xf000:start
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