current          2940 src/dps8/dps8_sys.c     int  current = -1;
current          3006 src/dps8/dps8_sys.c                 current = -1;
current          3011 src/dps8/dps8_sys.c             current = rc;
current          3024 src/dps8/dps8_sys.c             if (current >= 0)
current          3026 src/dps8/dps8_sys.c                 add_book_component (current, name, txt_start, txt_length,