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Method and apparatus for implementing virtual memory having multiple selected page sizes

  • US 5,555,387 A
  • Filed: 06/06/1995
  • Issued: 09/10/1996
  • Est. Priority Date: 06/06/1995
  • Status: Expired due to Fees
First Claim
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1. An apparatus for implementing virtual memory having multiple selected page sizes comprising:

  • a virtual address;

    the virtual address including a map index and a frame offset;

    selector means for receiving the virtual address frame offset and the multiple selected page sizes for generating an offset and index;

    said selector means including shifting means for generating a shifted page index; and

    an adder;

    said adder being operatively controlled by a segment size table entry and arranged to add a result of said shifting means to said result shifted back by one place;

    frame map table means for indexing the virtual address map index and the selector means generated index and generating a base address; and

    means for adding the frame map table means generated base address and the selector means generated offset and providing a physical address.

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