Kenneth A Rowland

US Patent:

54653649, Nov 7, 1995

Filed:

Mar 18, 1994

Appl. No.:

8/210530

Inventors:

Frederick L. Lathrop - Delray Beach FL
Kenneth A. Rowland - Boynton Beach FL

Assignee:

International Business Machines, Inc. - Armonk NY

International Classification:

G06F 1312
G06F 1310
G06F 300

US Classification:

395700

Abstract:

A program arrangement presently disclosed provides support within an operating system for a commonly used class of peripheral devices (e. g. mouse devices or, more generally, pointing devices). This arrangement effectively eliminates dependencies between device driver software associated with the supported device(s) and system (and/or application) software; so that device driver software can be created without extensive knowledge of the operating system and system software can be modified cost effectively without affecting the usefulness of existing device drivers. In this arrangement, device driving functions are assigned to two discretely separate program modules having a standardized interface. One module, included in the operating system, provides a device-independent base for coordinating device and system interaction. The other module is associated specifically and directly with supported devices, and can be created by programmers having little knowledge of the internal structure of the system software.

US Patent:

58900110, Mar 30, 1999

Filed:

Jan 27, 1997

Appl. No.:

8/791491

Inventors:

Antonio Abbondanzio - Austin TX
Bradley Paul Anderson - Delray Beach FL
Ronald Patrick Doyle - Raleigh NC
Kenneth Alan Rowland - Lake Worth FL
Sandra Juni Schlosser - Austin TX
Joel Leslie Smith - Round Rock TX

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 1300

US Classification:

395829

Abstract:

A method for dynamically translating bus address within a computer system is disclosed. In accordance with the method and system of the present invention, a computer system has a multiple of buses connected in a hierarchial manner. Information concerning a bus and a device attached to a bus are stored in a Hardware Namespace. In response to a request for an access to a device attached to one of the buses for the first time, a determination is made from the Hardware Namespace as to whether or not there is resource available for the device in a parent bus of the device. If there is resource available in the parent bus for the device, another determination is made from the Hardware Namespace as to whether or not the resource is exclusively allocated in the parent bus for the device. If the resource is exclusively allocated in the parent bus for the device, the device is configured according to the available resource. If the resource is not exclusively allocated in the parent bus for the device, the process resolves through each level of buses in the hierarchy until a bus having a resource that can be allocated for the device is found such that the device can be added to any one of the buses within the computer system independent of bus technology.