Patents Assigned to Siemens Noxdorf Informationssysteme Aktiengesellschaft
  • Patent number: 6339816
    Abstract: When there are write accesses to user pages in a data processing system that are marked as write-protected in a translation memory, the method checks, after an interrupt request, a corresponding page table entry and also whether there is an access with system authorization. If there is an access with system authorization, the write-protection is temporarily dropped until an operating mode changes from the system to a user. In order for the write-protection to be subsequently restored, control bits are used as indicators that are used to declare entries in the translation memory affected by the system accesses to be declared invalid.
    Type: Grant
    Filed: February 18, 2000
    Date of Patent: January 15, 2002
    Assignee: Siemens Noxdorf Informationssysteme Aktiengesellschaft
    Inventor: Jean Bausch