( At this point, Z is set if we have a match. In all cases,
  we want to pop HL and DE )
        DE POPqq,           ( <-- lvl 2 )
        HL POPqq,           ( <-- lvl 1 )
        JRZ, L2 FWR ( end-B296, match? we're done! )
        ( no match, go to prev and continue )
        HL PUSHqq,          ( --> lvl 1 )
        DE DECss,
        DE DECss,
        DE DECss,           ( prev field )
        DE PUSHqq,          ( --> lvl 2 )
        EXDEHL,
        LDDE(HL),


                                                      ( cont. )
