System and method for providing dynamic configuration ROM using double image buffers for use with serial bus devices
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United States of America Patent
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Dec 30, 2003
Grant Date -
N/A
app pub date -
Nov 1, 1999
filing date -
Nov 1, 1999
priority date (Note) -
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Abstract
A system and method for providing dynamic configuration Read Only Memory (ROM) using double image buffers for use with serial bus devices. The dynamic configuration ROM may be updated while linked to the serial bus and with little or no risk of publishing inconsistent configuration ROM information to other nodes on the bus. The dynamic configuration ROM comprises first and second configuration ROM images, one set to active, the other set to update. The dynamic configuration ROM publishes the configuration entries from the active configuration ROM image. Modifications to the configuration ROM are stored in a database. The update configuration ROM image is constructed from entries made to the database. After the construction of the update configuration ROM image is completed, the dynamic configuration ROM switches the states of the ROM images and transmits a serial bus reset signal. Subsequently, the configuration entries from the newly active configuration ROM images are then published to the other nodes on the bus.
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