Omnibus-A Multiprogramming Executive System for the Zero Gradient Synchrotron Control Computer

As the digital computer undergoes increasing utilization as an on-line evaluation and feedback control device for an accelerator, it becomes necessary to provide it with a multiprogramming executive software system. The system should be capable of accommodating several on-line control functions simultaneously so that these functions can be developed independently. The system should also provide for general purpose off-line utilization, such as new program development, to proceed simultaneously with and unimpeded by the continuous operation of the accelerator. OMNIBUS, the multiprogramming executive system now in use with the Zero Gradient Synchrotron (ZGS) control computer, incorporates these features and several others not found in commercially available multiprogramming systems. OMNIBUS obtains data for the various control programs from locations and at specific times requested by the programs and also provides the control link; either by modifying the program stored in the timing system of the synchrotron, or by direct transmission of timing pulses or digitalinformation to the accelerator. The system provides for operator modification of the various control programs and communications with them without interrupting their on-line control or monitoring functions.