ADDRESS CONVERTING DEVICE

摘要

PROBLEM TO BE SOLVED: To perform conversion to an actual address larger than a virtual address by performing the conversion to the actual address of an actual storage device by using a 1st address conversion table and a 2nd address conversion table for the actual storage device. SOLUTION: The contents obtained by multiplying the contents of the segment fields in a segment table-1 address stored in an extension register 1 and a virtual address by four are added together to obtain an address of a segment table-1 (1310). The contents that segment tables 0 (1300) and 1 (1310) indicate are connected to obtain an extension page table address 1320. The contents of the page field 1220 in the virtual address are multiplied by four. The contents obtained by multiplying the extension address and page field by four are added together to obtain an address of a page table 1400. The displacement field 1230 of the virtual address is connected low-order of the page address and an address extension stored in a page table 1410 is connected high-order of it to obtain an extension actual address 1600.