Electrical computers and digital data processing systems: input/ – Input/output data processing – Direct memory accessing
Reexamination Certificate
2006-02-27
2008-11-11
Auve, Glenn A. (Department: 2111)
Electrical computers and digital data processing systems: input/
Input/output data processing
Direct memory accessing
C710S308000
Reexamination Certificate
active
07451250
ABSTRACT:
In a portable FireWire compatible device, a direct memory access (DMA) bus switch coupled by way of a DMA bus to a central processing unit (CPU), a local hard drive (HDD), and a FireWire port, provides a direct connection between the FireWire port and the HDD bypassing a main bus and the CPU when a data transfer request is received and processed by the CPU. Otherwise, until the data transfer request is received and processed, the CPU is directly connected to the HDD. In this way, a high speed data transfer between the FireWire port and the HDD is provided only when an appropriate data transfer request is received and processed.
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Fadell Anthony M.
Krah Christoph
Apple Inc.
Auve Glenn A.
Beyer Law Group LLP
Vu Trisha
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