The ASR33, like most teletypes of the era, works at a fixed rate. It does 10 characters per second. It is 110 Baud, using 1 start, 8 data (inc parity), and 2 stop, so 10cps Tx and 10cps Rx; 10cps printing; 10cps punching tape; 10cps reading tape; 10cps maximum typing speed. Everything happens based on one motor that does this 10cps working, engaging clutches to start an operation which completes i