virtual t_mem add(t_addr addr, long what);
virtual t_mem wadd(t_addr addr, long what) { return(add(addr, what)); }
virtual t_addr dump(t_addr start, t_addr stop, int bpl,
virtual t_mem add(t_addr addr, long what);
virtual t_mem wadd(t_addr addr, long what) { return(add(addr, what)); }
virtual t_addr dump(t_addr start, t_addr stop, int bpl,