The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 01, 2016
Filed:
May. 12, 2014
Lenovo (Singapore) Pte, Ltd., New Tech Park, SG;
Lenovo (Singapore) PTE. LTD., New Tech Park, SG;
Abstract
The present invention protects a memory image of an OS in a sleep state. A CPU executes a first OS or a second OS while switching there between. The first OS is loaded into a main memory, and the second OS is loaded into an auxiliary memory. The auxiliary memory may be connected to a chipset through a PCIe interface. The main memory and the auxiliary memory are configured such that, when one is in an active state where the right of access to the CPU is obtained, the other makes a transition to the sleep state where there is no right of access to the CPU while maintaining the memory image. In order to prevent one OS in the active state from accessing the main memory or the auxiliary memory in which the memory image of the other OS in the sleep state is stored, the BIOS may set a corresponding controller to disabled during a POST.