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path: root/boot/pm.asm
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[bits 16]
switch_to_pm:

    cli				;switch off interrupts!
    lgdt [gdt_descriptor]	;load descriptor table!

    ;switch on 32-bit protected mode
    mov eax, cr0
    or eax,0x1 
    mov cr0, eax

    jmp CODE_SEG:init_pm

[bits 32]
init_pm:

    mov ax, DATA_SEG
    mov ds, ax
    mov ss, ax
    mov es, ax
    mov fs, ax
    mov gs, ax

    mov ebp, 0x90000
    mov esp, ebp

    call boot_32_pm	    ;continue booting in 32-bit protected mode