fm2_v_highlbn1    595 src/simh/sim_disk.c             unsigned fm2_v_highlbn1 : 6;      /* high order LBN                   */
fm2_v_highlbn1    714 src/simh/sim_disk.c         ScbLbn = (Retr->fm2_r_map_bits1.fm2_v_highlbn1<<16)+Retr->fm2_r_map_bits1.fm2_w_lowlbn1;