Portable computer enclosure
Clocked logic low power standby mode
Stanby mode controller utilizing microprocessor
Data processor system including data-save controller for protection against loss of volatile memory information during power failure
Cache/disk file status indicator with data protection feature
Power loss compensation for programmable memory control system
Wrap-around auxiliary keyboard
Processor having plural initial loading programs for loading different operating systems
Memory contents confirmation
ApplicationNo. 894511 filed on 06/04/1992
US Classes:713/323, Active/idle mode processing710/1INPUT/OUTPUT DATA PROCESSING
ExaminersPrimary: Kriess, Kevin A.
Assistant: Chaki, Kakali
Foreign Patent References
International ClassG06F 001/00
AbstractA 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.