P_MD_LA48
if ((imgp->proc->p_md.md_flags & P_MD_LA48) != 0)
p->p_md.md_flags |= P_MD_LA48;
p->p_md.md_flags &= ~P_MD_LA48;
p->p_md.md_flags &= ~(P_MD_LA48 | P_MD_LA57);
if ((p->p_md.md_flags & P_MD_LA48) != 0)