| 摘要 |
MAIN STORAGE ACCESS CONTROL SYSTEM FOR VIRTUAL COMPUTING FUNCTION SYSTEM A main storage access control system for a virtual computing function system includes an address register for registering memory addresses used for accessing a main storage and being operated under a plurality of address modes having different effective bit lengths concerning the memory addresses, a tag register for registering tag bits for individually designating the address registers, and a selection unit for selecting the designation of address registers designated by the tag bits by means of an operand address of an instruction which is to be executed by the program of the virtual machine monitoring region. The address mode is changed to the address mode used by the virtual computing function system by means of the output signal of the selection means. The method concerning the conversion of an access key by the output of a register designation detection unit in a virtual computing function system is also treated. |
