current          2921 src/dps8/dps8_sys.c     int  current = -1;
current          2987 src/dps8/dps8_sys.c                 current = -1;
current          2992 src/dps8/dps8_sys.c             current = rc;
current          3005 src/dps8/dps8_sys.c             if (current >= 0)
current          3007 src/dps8/dps8_sys.c                 add_book_component (current, name, txt_start, txt_length,