"load -s" loads a "special tty" image file, just like a plain "load" will. An unknown switch will raise an error.
This avoids a potential invalid pointer dereference when formatting the return value from sim_instr() if it is < SCPE_BASE but greater than the previously defined static array size.sizeof Update simh.doc to reflect this generic change.
A hardware device particular to MIT with some kind of bell sound.
