vmf_cs
vmf.vmf_cs = seg;
addr = MAKE_ADDR(vmf->vmf_cs, vmf->vmf_ip);
vmf->vmf_cs = POP(vmf);
PUSH(vmf->vmf_cs, vmf);
&vmf->vmf_cs, &vmf->vmf_ip);
vmf->vmf_cs = POP(vmf);
vmf->vmf_cs = 0;
addr = MAKE_ADDR(vmf->vmf_cs, vmf->vmf_ip);