SEG_TSS           168 vm.c             cpu->gdt[SEG_TSS] = SEG16(STS_T32A, &cpu->ts, sizeof(cpu->ts)-1, 0);
SEG_TSS           169 vm.c             cpu->gdt[SEG_TSS].s = 0;
SEG_TSS           172 vm.c             ltr(SEG_TSS << 3);