DATA PROCESSING SYSTEM WITH A PLURALITY OF PERIPHERAL DEVICES

摘要

A data processing system includes a plurality of host processors (12), a plurality of control units (11) and a plurality of peripheral devices (13). Each control unit has a buffer (15).
Operation times of the devices are marked by the buffer and controls which overlap device operations, queue device operations in a priority set of queues, and prioritize peripheral system operations. Plural specialized interconnections between each control unit and the devices include a preparatory connection for transfer of preparatory commands to devices, a tag or control connection for device selection, deselection and control and a data-command connection for signal transfers between a selecting control unit and a selected peripheral device.