Suspend/resume capability for a protected mode...

Details Suspend/resume capability for a protected mode... Suspend/resume capability for a protected mode...

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Patent

CA 2102421

A portable computer system includes a protected mode microprocessor (311) capable of operating in restricted and unrestricted modes, and an arrangement which in response to a predetermined condition saves information from the processor and then forcibly switches the processor to its unrestricted mode of operation. When running a multi-tasking operating system where an application program is being executed in a restricted mode, certain types of processing can be carried out after the unrestricted mode is entered due to the predetermined condition, then the interrupted application can be resumed with the restricted mode back in effect. An idle mode feature can automatically decrease and increase the speed of the processor clock (387) when user activity stops and later starts again, to conserve power.

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