Apparatus for maintaining one interrupt mask register in conform

Details Apparatus for maintaining one interrupt mask register in conform Apparatus for maintaining one interrupt mask register in conform

1992-06-04

1996-08-27

Kriess, Kevin A.

Boots, shoes, and leggings

395734, 395869, 3642399, 364240, 364246, 3642463, 3642624, 364231, 3642311, 3642314, 3642316, 3642421, 3642613, 364DIG1, 364DIG2, G06F 100, G06F 1324

Patent

active

055510337

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. The system includes a first interrupt mask register having a bit for indicating whether an interrupt is to be recognized by the processor, a second interrupt mask register having a bit for indicating whether the interrupt is to be recognized by a further circuit, and an arrangement responsive to a load of the first mask register for conforming the bit of the second mask register to the bit of the first mask register in a manner invisible to an application program being executed by the processor.

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