Main storage configuration control system

Claim 1

A main storage configuration control system for a data processing system having a central processor unit for providing a main storage address for a main storage unit comprising a main storage, including a plurality of memory units each having a memory address register, and a main storage controller for selecting one of the plurality of memory units and for controlling reading and writing of information with respect to the selected memory unit, said main storage address having higher and lower order portions, the lower order portion being used for addressing memory locations within each selected memory unit, the main storage configuration control system comprising: configuration data generation means for generating plural units of configuration data, including: a configuration processing unit for generating the units of configuration data; a configuration memory, operatively connected to said configuration processing unit, for storing the configuration data; a console, operatively connected to said configuration processing unit and said configuration memory, for initiating generation of the configuration data; and a main storage unit interface controller, operatively connected to said configuration processing unit, said configuration memory and said console, for controlling transfer of said configuration data; reloadable configuration unit select information storage means, included in the main storage controller and operatively connected to the memory units and to the central processor unit, for storing the units of configuration data and for outputting a memory unit selection signal in accordance with the higher order portion of the main storage address from the central processor unit and the configuration data; and configuration unit selection controller means, operatively connected to said main storage unit interface controller of said configuration data generation means, the central processor unit and said reloadable configuration unit select information storage means, for selectively controlling write-in of said configuration data from said configuration data generation means into said reloadable configuration unit select information storage means and for selectively controlling readout of one of the units of configuration data, as said memory unit selection signal, from said reloadable configuration unit select information storage means in accordance with the higher order portion of the main storage address from the central processor unit, so that one of the plurality of memory units is selected by the higher order portion of the main storage address and accessed by the lower order portions of the main storage address.