Simplified device drivers for hardware devices of a computer...

Details Simplified device drivers for hardware devices of a computer... Simplified device drivers for hardware devices of a computer...

2008-01-22

2008-01-22

An, Meng-Al T. (Department: 2195)

Electrical computers and digital processing systems: interprogra

Device driver communication

C719S327000

Reexamination Certificate

active

07322035

ABSTRACT:
A computer system uses simplified device drivers for operating hardware devices. A simplified device driver for a hardware device of a given device type, such as a flatbed scanner, works with a system-supplied common driver for that given device type. The common driver and the simplified driver together function like a regular device driver. The simplified device driver implements a small number of entry point functions corresponding to a pre-selected set of operation commands “generic” to hardware devices of that given device type. When an application makes a request for an operation by the device, the request is passed through a device driver interface (DDI) to the common driver. The common driver then calls the entry point functions in the simplified device driver to carry out the requested operation.

REFERENCES:
patent: 5265252 (1993-11-01), Rawson, III et al.
patent: 5727212 (1998-03-01), Dinallo

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