Electrical computers and digital processing systems: support – Digital data processing system initialization or configuration
Patent
1997-10-07
1999-11-16
Butler, Dennis M.
Electrical computers and digital processing systems: support
Digital data processing system initialization or configuration
713100, G06F 944
Patent
active
059876042
ABSTRACT:
The present invention is an apparatus and method for executing instructions in a system management mode in a processor-based system. The apparatus comprises a memory for storing instruction sequences by which the processor-based system is processed where the memory includes a system management random access memory (SMRAM). The apparatus also comprises a processor having a system address space, that executes the stored instruction sequences. The stored instruction sequences include process steps to cause the processor to: (a) configure the processor to operate in a protected mode while in a system management mode, the processor operating at address greater than one megabyte; (b) invoke a paging feature of the processor; (c) configure the processor to operate in a virtual mode; and (d) process the instruction sequences; wherein the process steps occur upon the receipt of an instruction to process a system management request.
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Butler Dennis M.
Phoenix Technologies Ltd.
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