Boots – shoes – and leggings
Patent
1990-10-09
1994-02-15
Fleming, Michael R.
Boots, shoes, and leggings
364DIG1, 364230, 3642302, 3642315, 3642318, 3642412, 3642133, 3642435, 364247, 3642475, 3642476, 3642477, G06F 920
Patent
active
052875237
ABSTRACT:
A method for servicing peripheral interrupt requests in a data processing system is provided. A state vector register stores a current state of a state machine which controls the interrupt-generating peripheral. In addition, the state vector register simultaneously stores an interrupt source identifier, which indicates the source of the highest priority interrupt request currently pending for the interrupt-generating peripheral. When the processor receives an interrupt request, the value stored in the state vector register of the interrupt-generating peripheral is read into an index register in the processor. The processor then uses the value as an index into a jump table, stored in memory, which contains the interrupt service routines. The use of the state vector register in conjunction with existing internal signals enables the processor to rapidly retrieve the appropriate interrupt service routine from memory, while minimizing the system overhead associated with servicing the interrupt request.
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Allison Nigel J.
Benzel Janice L.
Kowalski Joseph F.
Fleming Michael R.
Ford Motor Company
Motorola Inc.
Sheikh Ayaz R.
Whitaker Charlotte B.
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