System for copying device driver stub into allocated portion of system memory corresponding to receiving resource to enable device driver execution from resource memory
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United States of America Patent
Stats
-
Apr 4, 1995
Issued Date -
N/A
app pub date -
Jan 22, 1993
filing date -
Dec 27, 1991
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Device drivers for removable system resources are configured dynamically in a computer system which has a processor, a system memory and an interface for receiving removable system resources (generally denoted feature cards). A feature card includes a card memory area that stores a device driver for controlling the feature card. The feature card device driver is separated into two parts: 1) a full device driver portion, and 2) a stub device driver portion. The full device driver provides all of the device driver functionality necessary to control each and every function of the feature card. The device driver stub is a small compact portion of processing logic for linking the full device driver with operating system software located in the computer system. There is an upper bound for the size of a device driver stub of a given feature card. Any system will have a known number of card slots. Therefore, by allocating enough space per slot in computer system memory to contain the largest permitted card device driver stub, one can ensure that there will always be enough computer system memory to contain every device driver stub required by the system at a given time.
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