Peripheral controller for i/o subsystem using slow devices.

摘要

A peripheral-controller for use in an I/O subsystem for handling data transfer operations between a host computer and a plurality of peripheral terminals. The peripheral controller is made of a universal processor, which generates instructions and executes data transfer operations, and an application dependent logic module which particularly adapts the instructions to each peripheral terminal connected to the system. Upon recognition of the use of slow memories or slow devices, control logic in the application dependent logic module controls the clocking in said universal processor to slow data transfer rates to operate with the slow devices.