Boots – shoes – and leggings
Patent
1994-04-26
1994-12-06
Harrell, Robert B.
Boots, shoes, and leggings
364DIG1, 364280, 3642808, 3642809, 364282, 3649754, 364976, 3649761, 3649762, G06F 9455
Patent
active
053718798
ABSTRACT:
A method of implementing a privileged instruction that enables the development of new operating systems in user mode. The instruction decode logic includes a maskable interrupt generator that interrupts the processor during the processing of privileged instructions in user mode. An exception handler processes the privileged instruction interrupt and performs a function similar to the execution of the privileged instruction in privileged instruction mode. The combination of the privileged instruction interrupt and the post-interrupt exception handling enables the operating system developer to test new operating systems by laying them over the current operating system.
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Cray Research Inc.
Harrell Robert B.
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