System management interrupt for a desktop management interface/system management basic input output system interface function
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United States of America Patent
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Sep 19, 2000
Grant Date -
N/A
app pub date -
Oct 23, 1998
filing date -
Oct 23, 1998
priority date (Note) -
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Abstract
A computing system provides a process for updating a management information format (MIF) database while a processor is operating in a protected mode. The BIOS accesses a protected memory space by utilizing a system management interrupt (SMI). A SMI causes the computing system to enter a system management mode (SMM) and call a Basic Input Output System (BIOS) function, such as the BIOS function 52h (Set Structure), to accomplish an update of the MIF database. An OEM string, for example, may be updated. In SMM, the system is capable of accessing the entire memory address space without risking a memory protection fault.
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