Multiple virtual storage control system

摘要

A multiple virtual storage control system for a data processing system for handling a plurality of virtual spaces is disclosed. Virtual addresses indicative of addresses in the virtual spaces are translated to real addresses by a translation table. When a new virtual space is established by setting a first address or segment table origin address (STO address) of the translation table, a virtual space number is assigned to the established virtual space by an STO address stack, which comprises a definite number of registers. The number of virtual space numbers assigned is larger than the number of registers. The virtual addresses and the corresponding real addresses are stored in a high-speed address translator so that the virtual addresses are translated to the real addresses at a high speed. When an overflow of the virtual space number assigned in the STO address stack takes place, the plurality of virtual spaces registered in the high-speed address translator are simultaneously purged.