Motorola Mobility, Inc. v. Apple, Inc.

Filing 94

NOTICE by Motorola Mobility, Inc. of Filing Brief on Claim Construction (Attachments: # 1 Exhibit, # 2 Exhibit, # 3 Exhibit, # 4 Exhibit, # 5 Exhibit, # 6 Exhibit, # 7 Exhibit, # 8 Exhibit, # 9 Exhibit, # 10 Exhibit, # 11 Exhibit, # 12 Exhibit, # 13 Exhibit, # 14 Exhibit, # 15 Exhibit, # 16 Exhibit, # 17 Exhibit, # 18 Exhibit, # 19 Exhibit, # 20 Exhibit, # 21 Exhibit, # 22 Exhibit, # 23 Exhibit, # 24 Exhibit, # 25 Exhibit, # 26 Exhibit, # 27 Exhibit, # 28 Exhibit, # 29 Exhibit, # 30 Exhibit, # 31 Affidavit)(Giuliano, Douglas)

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Exhibit 9 to Motorola’s Opening Claim Construction Brief July 28, 2011 " APPLICATION FOR UNITED STATES LETTERS PATENT by Ian Hendry Eric Anderson and Fernando Urbina " I:) U1 ~) m ,I) for II) SYSTEM FOR REAL-TIME ADAPTATION TO CHANGES IN DISPLAY CONFIGURATION SWECKER & M AntIS . L.L.P. P.O. Bo~ 1404 Alexandria, Virginia 223]3-1404 (103) 836-6620 BURNS, DoANE, Auorney Docket: P2232-460 ,i . , EXHIBIT 9 PAGE 1 SYSTEM FOR REAL-TIME ADAPTATION TO CHANGES IN DISPLAY CONFIGURATION Fjeld or the Invention The presenl invention is directed to computer display systems, and more 5 particularly to a display system which is capable of instantaneously accommodating changes in the configuration of a computer system. BACKGROUND OF THE IN\'ENTION As computers become more prevalent in everyday use. particularly a 'I) C) personal type computers, users are employing them in a variety of different 10 'J situations. Depending upon the panicular siruation, the user may desire to change the configuration of the display devices connected to the computer. For example, portable computers of the so-called laptop or notebook type have become increasingly popular because of their small size and light weight, making them suitable for use while traveling. Due to the need to keep their dimensions to a 15 minimum, the display screens built into such computers are relati vely smail in size , and may offer only limited display capabilities. Therefore, when using one of these ty pes of computers in an office environmem, the user may connect it to a monitor having a larger display area andlor enhanced display capabilities . Such a connection might be made, for example, by means of a docking station which 20 enables the portable computer to be conveniently connected to a variety of peripheral devices. or by inserting a video card in a PC Card slol. Subsequently, the user might remove the added monitor. for example to take the computer home or to use it while traveling. In this situation. the built-in display screen must be used. In other words, the computer must route all 25 information to be displayed to the buill-in screen, rather than the port to which the external monitor was cormecled. In addi tion, Che displayed information must be -1- EXHIBIT 9 PAGE 2 PATENT Docket: P2232-460 reformatted, or otherwise processed, to accommodate the display parameters of the bu ilt-in device . In the past, changes in the configuration of the computer system, such as the addition or removal of display devices, only became effective upon a' restart, or 5 reboot, of the computenystem. As pan of ilS initial startup procedure, the computer's operating system detects the presence of each device driver loaded on the system, and registers each such detected driver to permit communications to be carried out between the operating system and the device with which the driver is associated. If a new device and corresponding driver are added to the system after 10 this initialization procedure, the driver is not registered with the operating system, and therefore communications do not take place until the operating system goes through its initialization procedure again, e.g. upon the next reboot of the computer. Hence, if a user adds a monitor to the computer system. the monitor cannot be used to display information generated by the computer until it has been IS rebooted. U.S. Patent No. 5,682.529 discloses a system for dynamically accommodating changes in the display configuration of a computer, without the need to restan the computer. In the system of this patent, changes can be made to the display environment for a computer system while it is in a sleep mode , in 20 which the computer's central processing unit is maintained in a minimal operating slate. When the computer is "awakened - from this sleep mode, the system of the '529 pateD! enables the changed configuration to be immediately recognized, and thereafter utilized in the display of information generated by the computer. As the capabilities offered by personal computers continue to expand, the 25 opportunities for changing the configuration of computers grows in a concomitant manner. In some situations, users may desire to have changes in the configuration of the computer's display environment become instantaneously effective, without -2- ·1) EXHIBIT 9 PAGE 3 PATENT Docket: P2232-460 the need to restart the computer or even place it in a sleep mode. For exam ple, the user may create a sl ide presentation on a notebook computer. During the course of a meeting, a user may desire to immediately d isplay the slide presentation, by connecling the computer to a suitable video projector , or the like. It is desirable to 5 be able to"carry OUI this operation without the need to first put the compUler 10 sleep, and thereby reduce the time needed 10 operate within the changed configuration. It is an objective of the present invention, therefore, to expand upon the capabilities of the system of the '529 patent, by providing a display , environment in which so-called "hot plugging" of displays is possible, wherein a 10 display becomes immediately available for usc as soon as it is plugged into the computer system. SliMMARYOF IHE INYENDON • Cl In accordance with the present invention, the fo regoing objective is U 1 r:l Dl 'Il achieved by utilizing a device manager to automat ically recognize and react to 15 P l changes in the configuration of a display environment. rather than wait for lIle computer's operating system to proactively determine the status of the display environment, fo r example upo n res tarting. When an input/output device is added to or removed from lIle computer system, an interrupt signal informs the device manager of lIle fact that a change in configuration has occurred. In response 20 thereto, the device manager dete rmines whether lIle changed component relates to the computer's display function. For example. it may determine whether an added device is a video card. If so, lIle device manager makes a call to the computer's dis play manager, to inform it of the fact that the d isplay configuration has changed. In response to this call, the display manager reconfigures the display 25 space for the computer system, to accommodate an additional frame buffer iliat is ·3· j EXHIBIT 9 PAGE 4 PATENT Dockel: P2232-460 associated with the added component. With this change in the configuration of the display space , the added compo~ent becomes immediately available for use. By means of this approach, the user can add a second monitor or other hardware component to 5 a: computer and begin to use the monitor as soon as it has been connected, without the need to reboot the computer or otherwise interrupt its current operating state. Further features and advantages of the invention are explained in detail hereinafter in the context of specific embodiments that are described with reference to the 10 accompanyin~ BRIEF DESCRIPIION OF THE DRAWINGS /' /7 drawings . lis a block diagram of an overall display system architecture; ?g~ illustrates an example of a display environment; .Ji!u r~ is a block diagram of a display system ~rchitecture which includes plural vid IS cards and display devices; igure 4 is a block diagram illustrating the operation of the device t. manager; d gUTe a flowchart illustrating the process by which changes in the configuration of the display envir~nment become immediately available to the user, in accordance with the prinCiples of the invention. 20 DETAILED DESCRIYIlON The present invention is directed to the display environment of ~ computer system. A block diagram of the overall architecture for a display environment is illustrated in Figure 1. In this figure, hardware components of the computer system are illustrated above a dashed line to, and software components are 25 depicted below the line. These software components are stored in a suitable ·4· EXHIBIT 9 PAGE 5 PATENT Docket: P2232-460 computer-readable medium, such as a magnetic disk, and loaded into the computer's working memory, i.e. RAM, for execution. The system can include display devices 12, e.g. monitors, LCD screens and/or plasma displays, although acrual display devices need not be physically present in order for the principles of 5 the invention [Q be operative. Each display device is connected to. and controlled by. a video card 14 which Qperates in accordance with video driver software 16. Although depicted as being on a separate substrate . such as a printed circuit board, the components of at least one video card could be incorporated with other components on a single substrate, such as the computer 's motherboard. 10 One or more software programs, such as application programs 20. generate information to be displayed on the display devices. Examples of such information include text. windows and other graphical objects, and control structures such. as menus and dialog boxes. This information is presented to the display device through the computer's operating system 18, which also generates its own 15 information to be presented on the display. The operating system communicates with the display device through an associated display driver 13, which constirutes a software component that corresponds to the hardware of the display device 12. The operating sY$tem includes a display manager 22, which provides communication between each of the software components, and dynamicaHy 20 configures the display devices 12. The communication between the va rious software components and the hardware devices takes place via their associated drivers, e.g. the video driver and the display driver. In this regard. many video displays have the capability to provide informati.o n regarding their available modes of operation andlor timing specifications. Some displays, so-called ·smart 25 displays.· are capable of providing infonnation about their modes of operation directly. for example in response to inquiries. For these types of displays, the display manager 22' communicates directly with the display device, by means of -5- EXHIBIT 9 PAGE 6 PATENT Docket: P2232-460 the display driver 13, over a communication channel 24. This communication channel can be a bus within the computer, a serial line, or any other suitable path for exchanging information between the display manager and the display driver 13 of the d isplay device. S In some cases, the display device may not be able to communicate its capabilities directly . However, through the use of a lookup table or the like, the display driver 13 can obtain information regarding the display's capabilities, and provide them 10 the display manager. The display manager also communicates with other parts of the operating 10 system 18 and the other software programs 20 that are running o n the computer. For example, in response to operator commands, the operating system can instruct the display manager to add a new devke to a Jist of active displays, or remove a " I:l 11 1 I:l device therefrom. In response thereto, tile display manager informs the application programs 20 of the new display configurations. to enable them to update their IS I~ d isplayed information accordingly. In one known implementation for computer systems, the display 'Il I)J envirorunent can generally be considered to be defined by a global coordinate ' space 30, as depicted in Figure 2. Objects and other information to be displayed can be positioned anywhere within this space, as determined by the user andlo r the 20 software program that generates the infonnation. A reference point in this space, e.g. its origin or 0,0 coordinate point, is usually established with reference to some object that is always present in the display. For instance, most graphical user interfaces include some type of menu bar or other structure which enables the user to access basic commands to control the computer. The device which displays this 25 menu bar is known as the main display device. If the compute r system contains mUltiple display devices. only one of the devices is designated as the main device, even if multiple devices contain the menu bar. The origin of the coordinate -6- .i EXHIBIT 9 PAGE 7 PATENT Docket: P2232-460 display space is typically established with reference to the menu bar. For example, as illus trated in Figure 2, the 0,0 point 38 in me coordinate space can coin<;ide with the top left corner of a menu bar 36. The positions of all obj ects ana other informalion to be displayed in the display space 30 are defined by their 5 coordinates within this space. The operating system receives this coordinate information, for example from the software programs 20 which generate the information, and provides it to the display drive r to cause the information to appear at the appropriate place on the screen of the display device located at the corresponding position in the display space. 10 In the example illustrated in Figure 2, the display environment consists of twO display devices, 32 and 34, within the global display space 30. A menu bar 36 is displayed at the tOp of the screen for the device 32, which is therefore the main display device. Accordingly, the origin 38 of the display space coincides wi th the top left corner of the device 32. As illustrated in Figure 2, the user has 15 caused some objects, e.g. wi ndows 40, to be displayed. on the device 32 , and another object 42 10 be displayed. on the device 34. Figure 3 illustrates the configuration of the computer system for the particular example illustrated in Figure 2, which includes two display devices. Each d isplay device i.s connected to an associated video card, wh ich includes a 20 corresponding video driver. For the sake of simplicity in Figure 3, the display drivers are not separately illustrated, but are assumed to be present within the system, in a manner analogous to the arrangement shown in Figure 1. The embodiment of Figure 3 includes two video cards 14 and 14', respecti vely associated with the two video display devices 12 and 12 '. Each of the video cards 25 communicates with the display manager 22, by means of its associated video driver 16 and 16'. -,,I EXHIBIT 9 PAGE 8 PATENT Docket: P2232-460 Among other components, each video card includes a frame buffer , e.g. ra ndom access memory, which stores the dala for the image that is displayed on ilS associated display device 12 . In essence, the display manager 22 assigns the frame buffer 1 a corresponding portion of the global coordinate space 30. In the 0 5 example of Figure 2. the two frame buffers are assigned to mutually exclusive portions of the global space. However. some or all of the portion assigned to one of the frame buffers could overlap with the area assigned to the other frame buffer. In, lhis case, the same image, or ,portion of an image, appears on both display devices. , At any given lime, there could be only one video card connected to die 10 compUler, or both cards could be connected . Furthermore. in the case of a network server or the lik:e, it is possible that no video card would be present over certain periods of time. Even when both cards are present, onl y one of them may " I:) 111 I:) II) have a monitor or other display device connected to it at any particular point in I' time. .)) In the case of a convemional desktop or notebook computer system, one of 0) the video cards might be incorporated within the structure of the computer system, and may not be designed to be repeatedly inserted and removed by the user. Additional video cards , however, might be capable of being easily inserted into 20 and removed from the computer system. For example, the video card might be implemented in a removable card that conforms to the PC Card standard . This standard defines lhe form factor fo r relatively small, credit-card shaped 110 devices , which are designed to be easily inserted into and removed from computer housings, to provide a computer with differe nt capabilities. Included among the 25 types of 110 devices that can be·embodied in such a card are modems, facsimi le devices, network interface cards, wi reless communications devices and hard disk drives . -8- , ,I EXHIBIT 9 PAGE 9 PATENT Docket: P2232460 Devices of this type which conform to this standard , commonly known as PC Cards, are designed to be r~adily inserted and removed from the computer hous,ing. The detection of the presence of such devices, as well as their removal from the system, is handled by a portion of the computer's operating system that is 5 referred to herein as a device manager. Referring to Figure 4, when a PC Card 44 is inserted into the housing of the computer, it actuates a switch 46, or equivalent sensor de vice, which sends an interrupt signal IRQ to the device manager 48 . In response to this interrupt. the device manager determines the type of device which has been inserted, and informs the operating system 18. In a similar manner, 10 whenever the PC Card is removed from the computer housing, an interrupt is also sent to the device manager, which in turn notifies the operating system that the device is no longer available. Another type of change which can be made to the display configuration of " CJ ~J1 I:) II) the computer is the addition or removal of a display device. In the example of 15 Figure 3, for instance, either one of the display devices 12 or 12' could be disconnected from its associated video card 14 or 14 ' . Furthermore, if only one ,Il display device is present, it could be disconnected from one of the video cards 14 Ol and connected to the other video card 14'. Whenever a change of nature occurs, an interrupt is sent to the device manager 48. For instance, the interrupt , 20 could be generated by the video card, upon detecting that a display device has been pbysically connected to or disconnected from it. Alternatively, the interrupt could be provided by a bus that is capable of detecting such a change. The addition or removal of other types of hardware can also result in a change in the display configuration of the computer system. For example, a 25 graphics accelerator card can be added to the system by means of a PC Card slot. Again, upon the addition or removal of such a device, an interrupt signal IRQ is sent to the device manager. -9- Il .. ' . ' .",~ , EXHIBIT 9 PAGE 10 PATENT Docket: P2232-460 The present invention is particularly directed to the situation in which the device tbat is added 10 or removed from !.he computer system is related to the display function. In the past, it was necessary to reboot the computer system in order for a change in video hardware to become effective. More particularly, .5 unless a reboot occurred. the operating system was nOI prompted to undertake any action which would cause il to detect the presence of a new driver. resulling from the addition of ao associated hardware device. Hence, it was necessary for the user to interrupt the operating Slale of the computer in orde r to utilize the Cl 'Cl l 'J additional functionality provided by a newly added hardware . Once the operating 10 system became aware of the presence of the new driver , it cou ld notify the display manager to incorporate the presence of the new frame buffer. In accordance with the present invention, however, the display system can be immediately responsive to the addition or removal of video hardware, so that the capabilities of a revised configuration can be employed without the nt!ed to l' change the operating state of the computer. This functionality is accomplished by, in effect, bypassing the need to have the operating system actively determine the addition or removal of a display device. Rather, the notification of a change in the configuration of the display environment is provided directly to the display manager, so that it can directly account for the presence or absence of a particular 20 video device. To mis end, whenever a PC Card is added to or removed from me computer system, me device manager determines whether the card relates to a display funclion. A similar determination is made whenever an interrupt is generated that indicates some other type of hardware has been added or removed , 25 e.g . a display monitor. In addition to, or in lieu of interrupts, other approaches can be employed to determine when a device has been added or removed. For example, the operating system can periodically poll all of the computer system's ·10· , " II EXHIBIT 9 PAGE 11 PATENT Docket: P2232460 110 ports, to delennine which devices 3rc present and which ones might have been removed. Referring to Figure 5, upon receipt of an indication thai the re has been a change in configuration, the device manager fi rst dete rmines at step 50 whether a 5 device has been added or removed . If a device has been added to the system, the device manager communicates ",(,im the device to detennine its type, at step 52, and stores daca in a register regarding the identity and type of the device. If the device responds with an ind)cation that it is a yKleo device. the device manager issues a call to the display ma nage r 22. at step 54. Approp riate parameters can be 10 included with the call , to indicate the type of device, the size of its frame buffer (if applicable), its resolution. and the like. In response to this information, the display manager carries out a number of operations, depicted in Steps 56-64. First, it registers the added hard ware as a • new device, along with the location of its associated drivers in memory, at step 56. 15 In some cases, the driver may already be present in memory, but in an inactive state because the device was not connected to the system at the time of initial boot. In this case, the display manager switches the dri ver to an active state. After registering the device, the display manager matches each display device with an available frame buffer at step 58. If a new video card is inserted, 20 for example. the display manager assigns a portion of the global coordinate space 30 to the frame buffer in the video card . If a display device is connected to that video card , the display manager assigns that device to the frame buffer for that card, so that the proper data is displayed on the device. If a display device is disconnected from one video card and connected to a diffe rent video card, the 25 display manager moves objects withi n the globaJ space 30 so that they are presented to the app ropriate frame buffer f~r the display device. For example, the display manager can move user interface oontrol objects which are specific to that . .i ) /v-EXHIBIT 9 PAGE 12 PATENT Docket: P2232-460 display, such as brightness and contrast controls, to the frame buffer associated with that display. Similarly. if the display has other attribUies associated with it, such as a cenain name or designation, the display manager ensures that they are directed to the proper frame buffer. 5 Once the display devices and frame buffe rs are matched up. the display manager consults a preferences file which indicates whether thai device was COMecled to the system at some previous time. This file is preferably stored in pennanem memory, such as a hard disk. and updated each time a video device is r.l added to or removed from 'Il Cl 'J 10 ·1 : I,J C l me computer system to change its configuration. The file stores the state efthe display just prior to the change. For insrance, it may siore the location of the menu bar and all other objects on the desktop of the user interface, along with each device that made up the configuration. Ie can store r.l relevant operating parameters for the device as well, such as timing values, color C l deplll, and the like. When a new device is added, lIle display manager determines 111 I;) IS Ol "l O l whether lIle changed configuration bad existed previously, and if so it attempts to restore the display environment ~o the state that existed the last time that configuration was present, at step 60. For example, it might move the menu bar and certain icons to the screen of a newly added display device, if lhey were previously located on that device before it was disconnected, or set the timing of 20 an added frame buffer. In addition to lIlese actions, at step 62 the display manager can inform currentl y executing progranu of the pr~encc of the new video device, as described in detail in U.S. Patent No. 5,682,529, lhe disclosure of which is incorporated herein by reference. Furthermore , other software which is nOI executing, but 2S which relates 10 lIle new device, can be activated. For instance , if a graphics accelerator card is inserted in a PC Card slot, the software associated with that card can be automatically launched. ,; EXHIBIT 9 PAGE 13 ," PATENT Docket: P2232-46Q The display manager also functions at step 64 to rebuild or reconfigure resources that might be employed by the new device. For example, in some display modes a table lookup operatio n is carr ied out to determine the colors which are displayed on the monito r. Differe nt applicatio n programs may utilize di(ferem 5 tables for this purpose. Typically, the window which is in the foreground of a display controls the panicular table thai is used . Therefore. when windows are moved onto a new display device, (or instance in accordance wit h the prefe rences fi le, the dis play manager rebuilds the color lookup table stored in the frame buffer for that device so that it corresponds 1 the appropriate window . 0 10 If the device manager del.ermines at step SO that a device has been removed from the system, rather than added, it dete rmines at step 66 whether the removed hard ware was a video device, fo r example by reference to previously stored information which indicated the type of card inserted into each PC Card slot, or the like . If a determination is made that thc removed device was part of the video IS subsystem, the device manager sends a call to the display manage r 22, at step 68, to inform it of this fact . In response thereto, tne display manager updates the prefe rences file at step 70, to record tne· relevant parameters that pertain to the most recent configuration. In addi tion. the display manager can allempt to restore preferences that pertain to the new condition. Thus, for example, if the computer 20 system had two display devices and one was removed, the preferences file wou ld be updated to store the relevant data for the two-monitor configuration, and then searched to determine wbether it contains data fo r a one-monitor configuration. The display manager then rebuilds the display configuration, at step 72 . For example, if the re moved device is a video card , the display manager deletes the 2.5 assignment of a portion of the display space to the now- removed frame buffer. In concert with this action, the display manager can also function 10 move objects that were previously displayed o n the removed display device to an area associated EXHIBIT 9 PAGE 14 PATENT Docket: P2232-460 Wilh a remaining display device, as described in greater detail. in U.S. Patent No. 5,682,529. If the removed device had executing software associated with it, the display manager can cause the software [0 shut down . A special case can occur if ali frame buffers, e.g. video cards, are removed 5 from the system . Since the frame buffer is a memory-mal?ped itO device , a program or other device could atlempt to address memory that is no longer present. Typically, when such a situation occurs, the operating system recognizes it as an error condition, and shuts down the process which attempted co address the non-existent memory. However, in the system of the present invention. if an IO attempt is made to address memory in a video device, e .g. a frame buffer, the resulting error condition is treated as an interrupt. This interrupt is relayed to the display manager to cause it to reconfigure the display environment. and delete the assignment of display space to the frame buffer which is no longer present. I:) 1)1 I:) Anotber action that can occur upon removal of a display device is to change 15 i)) the operating mode of its display driver. More particularly. some display devices 'I) can operate in one mode in which adjustment of control buttons, such as brightness i)l and contrast controls, is accompanied by user interface feedback. e.g. variation of a Sliding scale on the display. This operating mode requires communication with the computer's operating system. In another operating mode, referred to as a 20 remote mode, no such user feed?3ck is provided. In the system of the present i nventio~, when a display device is to be removed, the display manager instructs its display driver to switch to the remote mode, so that no attempt is made to affect the user interface while the device is not present. From the foregoing, it can be seen that the present invention provides a 25 hot-plugging capability for video devices, that enables users 10 imme'diately take advantage of changes in the display configuration of a computer system, such as the addition of a new video card . This functionality is attained by providi ng -14- EXHIBIT 9 PAGE 15 PATENT Docket: P2232-460 notification of the changed configuration directly to the display manager, rather than waiting for an action that prompts the operating system to review the current configuration, such as rebooting the computer. It will be appreciated by those of ordinary skill in the art that the present .5 invention can be embodied in other specific fonos without departing from the spirit or essential characteristics thereof. For example, while one embodiment of the invention has been described in the context of the insertion and removal of video cards that are embodied in PC Cards, it will be appreciated that the principles which underlie the invention are not limited to this particular implementation. 10 Rather, any other suitable mechanism which accommodates the addition and removal of a video device can benefit from the features of the present invention . The presently disclosed embodiments are therefore considered in all respects to be illustrative, and not restrictive. The scope of the invention is indicated by the 1:) 1.1 I:l OJ IJl appended claims, rather than the foregoing description, and all changes that come 15 within the meaning and range of equivalents thereof are intended to be embraced therein. i~ -1.5- EXHIBIT 9 PAGE 16 PATENT Docket: P2232-460 \?~-.I , I WHAT IS CLAIMED IS: -..t.. A method for reconfigul"ing a computer system to accOmmodate changes in a . Jay environment, comprising the steps of: the addition or removal of an input/output device in the compute r system ; determining wbether input/outplJt device which has been added or removed is a video device, in response t id detection; providing a notification to a display ager that a video device has been added or removed; and modifying the a11ocation of display space to display ices via said display manager . in accordance with the addition or removal of a video de • 2. e. The method of claim I wherein the video device comprises a video IJ card that includes a frame buffer, and said modification step includes ass igning a r.J portion of the display space to the frame buffer of an added video card, or deleting 'Il the assignment of a portion of the display space to a removed video card. 111 III III 3. The method of claim I wherein said display manager fu rther carries out the step of storing a preferences file that identifies the Slatus of displayed objects prior to a change in the configuration of a computer. 4. The method of claim 3 wherein, upon detection of the addition ofa video device, said display manager repositions objects in said display space, in accordance with a status stored in said preferences file . 5. The method of claim I wherein said video device is a display device, and said display manager carries out the step of assigning a respective -16- ., I) EXHIBIT 9 PAGE 17 PATENT Docket: P2232-460 frame buffer, which corresponds .to an allocated portion of the display space, to a corresponding display device. 6. The method of claim I wherein, upon detection of the addition of a video device, said display manager causes a software program associated with the added device to be launched. '1. The method of claim I wherein said display manager fu rther carries out the step of rcconfiguring a col!lputer resource to correspond to the status of objects located in the display space. 8. The method of claim '1 wherein said computer resource is a color look-up table. 9. The method of claim I , further including the step of recognizing an error condition resulting from an attempt to address a frame buffer that has been removed, providing a notification to said display manager in response to said error condition, and deleting an allocation of display space to the removed frame buffer . ili:.. A system which provides hot-plugging capabilities for display devices, compn . a video ./ 5 vice including a frame buffer. for storing data that defines an image to be displayed on associated display device; a display manager w . h defmes a display space and assigns a portion of said display space 10 said fram uffer, and which provides data for images to be displayed to said frame buffer; a -17- t 9 EXHIBIT J PAGE 18 PATENT Docket: P2232-460 a device manager which detects the addition or removal of the video stem, and provides a notification of such addition or to cause the assignment of a portion of the display 10 I "-_... - space to be modified in accordance -- 11. The system o f claim 10, wherein said display manager launches a software program associated with the video device in response to notification thaI the video device has been added. 12. ,r. The system of claim I I further including a preference file stored in memory which indicates the status of objects being displayed when a video device uJ is removed. Cl I:l i:l r 11 /~' 1 I:l A system which provides hot-plugging capabilities fo r d isplay devices, com III 'Il ing: at lea ne display for displaying images; er which defines a display space and assigns a a display m Ol portion of said display space [0 a lay device, and which provides data fo r images to be displayed on said display de ' ; and a device manager which detects th dilion or removal of a display device in a computer system, and provides a notification such addition or removal to the display manager to cause the assignment of a po . n of the display 10 L ____ space to be modified in accordance with a detected addition or remov ···~·' 14. The system of claim 13 further including a frame buffer which is associated with an assigned portion of the display space, and wherein said d isplay -18- (1 .1 EXHIBIT 9 PAGE 19 PATENT Docket: P2232-460 manager modifies said assignment by associating said frame buffer with said display de vice. 15. The system of claim 13 funher including a preference file slOred in , memory which indicates the Status of objects being d isplayed when a display device is removed. 16. A computer-readable medium containing a device manager program and a display manager program, wherein said de vice manager program performs lIle steps of , detecting lIle addition or removal of an input/output device in a computer system, determining whether the input/output device is a video device, and • providing a notification to the display manager program when a video device is added or removed; and wherein said display manager performs the step of: modifying lIle allocation of display space to display devices in 10 response to said notification from the device manager. 17. The computer-readable medium of claim 16, wherein said display manager further performs the steps of storing a preference file relating to the starus of objects appearing on a display device, and restoring objects to the statuS stored in the preferences fLle when a video device is added . 19!1 18. The co puteNeadable medium of claim 16, wherein said display manager performs the tep of assigning a respective frame buffer to a display device in response to id notification. \ \ c.--,i -2.•.[ EXHIBIT 9 PAGE 20 PATENT Docket: P2232-460 19. The computer-readable medium of claim 16, wherein said display manager perfonns the further step of launching a software program in response to said notification. 20. The computer-readable medium of claim 16, wherein said display manager performs the further step of reconfiguring at least one compUier resource in accordance with the modification of the display space allocation. o 21. The computer-readable medium of claim 20, wherein said computer ~ ~. ~r~ource is a color look-up table. ·1) i.J i:) i:) • i:l In 1:) ill .11 P J -20- I 2- ( EXHIBIT 9 PAGE 21 ;' PATENT Docket: P2232-460 ABSTRAC1' OF THE DISCLOSURE A hot-plugging capability for video devices is achieved by shifting the responsibility for recognizing changes in the configuration of a display environment from a computer's operating system to a device manager. When an input/output device is added to or removed from the computer system , an interrupt signal informs a device manager of the fact that a change in configuration has occurred. In response therCIO, the device manager determines whether the changed component relates (0 the computer's display fu nction . If so, the device manager makes a call to the computer's display manager, to inform it of the fact thaI the d isplay configuration has changed . In response to this call., the display . ~: manager reconfigures the display space for the computer system and notifies uJ clients as appropriate, to accommodate display features associated with the added I~ component, With this change in ,the' configuration of the display space, the added rJ .I:l U, component becomes immediately available for usc , I:l I~ "l III " .' EXHIBIT 9 PAGE 22

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