Software requirements of the central control system computer for the TEXT tokamak

The Central Control System computer for the Texas Experimental Tokamak (TEXT) serves as the primary operator interface to the Central Control System. It is used to monitor and display control-system status and allows rapid programing of the digital 'shot' sequencing timers and microprocessors-based analog pulse generators and data logger systems. The computer is used for operator displays and 'shot' parameter editing functions, operator command entry functions, and charging and firing cycle initialization functions. Maintenance of reference 'shot' parameters and analog pulse generator waveform data is also accomplished using the computer. The analog pulse generator and data logger systems contain adequate RAM for both application program and data for one 'shot', as well as the firmware necessary for communication with the control system computer. The control system computer loads these systems with data and applications programs before each 'shot'. The implementation of these system functions is discussed.