Electrical computers and digital data processing systems: input/ – Input/output data processing – Direct memory accessing
Reexamination Certificate
2006-10-31
2006-10-31
Shin, Christopher (Department: 2181)
Electrical computers and digital data processing systems: input/
Input/output data processing
Direct memory accessing
C710S005000, C710S035000, C710S052000
Reexamination Certificate
active
07130932
ABSTRACT:
A method and apparatus for increasing the performance of communications between a host processor and an interconnected device is provided. The present invention allows data transfers to be performed without requiring frequent interrupts of the host processor by the adapter interconnecting the host processor to the device. In addition, the present invention allows the host to issue commands without writing extensive commands or data to the adapter. Instead, the host is merely required to increment a value held by a register, and to place commands in memory that is local to the host. Furthermore, the present invention allows direct memory access operations to commence even in the absence of receiving confirmation from the device that the device is ready to perform such operations. The present invention is suitable for interconnecting a host system to one or more devices, including in connection with the provisions of a redundant array of inexpensive disks.
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Adaptec, Inc.
Sheridan & Ross P.C.
Shin Christopher
LandOfFree
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