Electrical computers and digital processing systems: interprogra – Device driver communication – Multimedia device driver
Reexamination Certificate
2006-05-16
2006-05-16
An, Meng-Al T. (Department: 2195)
Electrical computers and digital processing systems: interprogra
Device driver communication
Multimedia device driver
Reexamination Certificate
active
07047534
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.
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Camara Franc J.
Partin Lyman Cooper
Sadovsky Vladimir
Tsuchida Keisuke
An Meng-Al T.
Lee & Hayes PLLC
Microsoft Corporation
Truong Camquy
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