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