METHOD AND MEANS EXTENDING ADDRESS

    公开(公告)号:JPH05210570A

    公开(公告)日:1993-08-20

    申请号:JP22427592

    申请日:1992-08-24

    Applicant: IBM

    Abstract: PURPOSE: To provide a method for extending the size (maximum 31 bits) of a small address so that data or the like can be arranged in any place in an extremely large memory (beyond the 31st power of 2). CONSTITUTION: An extender EXR 348 is connected with the top end of a conventionally generated actual or absolute address. The value of each EXR 348 decides the section of an extremely large memory, and the type of the EXR position to be used is indicated by providing a central processing unit(CP) extended address mode(CPEAM) field 30 in a control register(CR). The CPEAM field indicates whether or not a CP EXR field is related with an AR, PTE, STE, or ASTE, and when the CP is operated in a DAT-ON mode 31, access to the indicated EXR type is performed in an address conversion process.

Patent Agency Ranking