[bymsx@bymsx-K53SM kernel]$ qemu-system-i386 -kernel myos.bin
KVM internal error. Suberror: 1
emulation failure
EAX=80000011 EBX=0010a000 ECX=00000001 EDX=00100e30
ESI=00000000 EDI=00109000 EBP=00000000 ESP=00006edc
EIP=001011f7 EFL=00010086 [--S--P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
CS =0008 00000000 ffffffff 00c09b00 DPL=0 CS32 [-RA]
SS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
DS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
FS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
GS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
LDT=0000 00000000 0000ffff 00008200 DPL=0 LDT
TR =0000 00000000 0000ffff 00008b00 DPL=0 TSS32-busy
GDT=     00103000 00000027
IDT=     00103060 000007ff
CR0=80000011 CR2=00000000 CR3=00108d10 CR4=00000000
DR0=00000000 DR1=00000000 DR2=00000000 DR3=00000000
DR6=ffff0ff0 DR7=00000400
EFER=0000000000000000

void switch_page_directory(page_directory_t *dir)
{
   current_directory = dir;
   asm volatile("mov %0, %%cr3":: "r"(dir->addresses));
   u32int cr0;
   asm volatile("mov %%cr0, %0": "=r"(cr0));
   cr0 |= 0x80000000; // Enable paging!
   asm volatile("mov %0, %%cr0":: "r"(cr0)); // вот на этой строке
}