Suspend/resume capability for a protected mode microprocessor
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United States of America Patent
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-
Oct 9, 2001
Issued Date -
N/A
app pub date -
Jan 23, 1997
filing date -
May 17, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A laptop computer system includes a protected mode microprocessor 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, a suspend/resume operation can be carried out in which the system is substantially powered down and then powered back up, and will resume the interrupted application with the restricted mode back in effect. Further, set-up changes such as adjustment of the processor speed can be made without exiting the application program running in the restricted mode.
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