The use of minicomputers in racetrack totalisator systems

A racetrack totslisator is described which is capable of processing 300 bets/s from up to 1000 ticket-issuing machines. The system contains minicomputers which provide high-reliability low-cost computing power, capable of supporting the requirements of any racetrack in the United States or Canada. The computers are duplexed. Both computers process every bet and operator action. Either computer can continue processing if the other fails. The software provides extensive error checking of all hardware components. All bets are logged to magnetic tape, which can be used to restart the system in case of a system "blow." The real-time program was written in machine language and a specially developed higher level language. The master file contains 35 000 instructions. A typical program may contain 20 000 words of program and data tables. An off-Hne program is used to generate individual systems, tailored to the requirements of specific racetracks.