opos              796 src/simh/sim_tape.c t_addr opos;
opos              804 src/simh/sim_tape.c opos = uptr->pos;                                       /* old position */
opos              810 src/simh/sim_tape.c     uptr->pos = opos;
opos              816 src/simh/sim_tape.c     uptr->pos = opos;