CA2082118C - Computer, and apparatus and method for system reconfiguration thereof - Google Patents

Computer, and apparatus and method for system reconfiguration thereof

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Publication number
CA2082118C
CA2082118C CA002082118A CA2082118A CA2082118C CA 2082118 C CA2082118 C CA 2082118C CA 002082118 A CA002082118 A CA 002082118A CA 2082118 A CA2082118 A CA 2082118A CA 2082118 C CA2082118 C CA 2082118C
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CA
Canada
Prior art keywords
adapter
slot
expansion
computer
information
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CA002082118A
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French (fr)
Other versions
CA2082118A1 (en
Inventor
Yeong-Chang Lien
Hironao Sone
Kazuo Sekiya
Yoshihisa Kanada
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International Business Machines Corp
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International Business Machines Corp
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Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Publication of CA2082118A1 publication Critical patent/CA2082118A1/en
Application granted granted Critical
Publication of CA2082118C publication Critical patent/CA2082118C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/44—Arrangements for executing specific programs
    • G06F9/4401—Bootstrapping
    • G06F9/4411—Configuring for operating with peripheral devices; Loading of device drivers
    • G06F9/4413—Plug-and-play [PnP]
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/40—Bus structure
    • G06F13/4063—Device-to-bus coupling
    • G06F13/4068—Electrical coupling
    • G06F13/4081—Live connection to bus, e.g. hot-plugging
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/44—Arrangements for executing specific programs
    • G06F9/4401—Bootstrapping
    • G06F9/4411—Configuring for operating with peripheral devices; Loading of device drivers

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Software Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Hardware Design (AREA)
  • Human Computer Interaction (AREA)
  • Stored Programmes (AREA)
  • Hardware Redundancy (AREA)
  • Bus Control (AREA)
  • Computer And Data Communications (AREA)
  • Debugging And Monitoring (AREA)
  • Exchange Systems With Centralized Control (AREA)

Abstract

A computer system is provided which allows adapters to be inserted or removed while keeping the system operational, and which can automatically reconfigure the system according to such insertion or removal.
When an adapter is inserted, an adapter detection mechanism informs a resource manager of the insertion of the adapter with an interrupt or the like. The resource manager electrically and mechanically connects the adapter immediately after its insertion, and reads the attribute information of the adapter from a memory on the adapter to perform the necessary setup, inclusion of the device driver necessary for the system, and assignment of memory and the like, thus enabling the adapter. When a user wants to remove an adapter, he or she issues an adapter removal request from an adapter removal button, or from a program to the resource manager. This request is transmitted to the resource manager, which checks the running state of the adapter, and, if it can be removed, electrically and then mechanically disconnects it so that it can be removed.
The user of the computer system removes the adapter after it is disconnected.

Description

JA9-91-505 1 ~ ~2~ 8 C~Ul~K, AN~ APPARATUS AND METHOD ~O~
~Y~L1A~ Kk~O~lGUR~TIO~ OF

This invention relates to computer systems such as personal computers or workstations, and more particularly, to a computer system the system configuration of which can be modified by use of adapters.
Modifying the configuration of a system unit such us a personal computer by using adapters has been extensively employed. Howe~er, in the conventional approach, an adapter is defined as a static or fixed resource so that the system configurati.on cannot be modified while the personal computer is in operation or powered. In a conventional sys-tem, a power-on reset procedure takes place when a system power supply is turned on. All hardware is reset, and then diagnosis of system resources is conducted ~or checkin~ the CPU, memories and the like.
At the same time, adapters are also checked. The system stores in a nonvolatile memory or the like information on what type of adapters are mounted, and generally checks the adapters based on the information stored in the memory. When the configuration of the adapters must be modified, the usllal procedure is to turn off the power supply of the system once, and to run an automatic setup program for reconfiguratlon of the system so as to enable it to install device drivers by assigning I/O addresses, memory addresses, interrupt levels and the like. If there is no automatic setup program, or if setting cannot be performed with the awtomatic setup program, a system administrator has to manually set such settings by using dip switches or the like. Thus, changing of an adapter :imposes a signi~icant burden on the user.
There are the following patent references relating to this invention. First, Japanese Published Unexamined Patent Application (JPUPA) No. 60-10481, JPUPA ~o.
62-27841, and Japanese Published Unexamined Utility Model ~pplication 61-143224 disclose how to prevent an adapter or a system from damage or ma1functioning when inserting or removing a adapter. ~PU~A No. 63-234488 discloses how to de-tect insertion or removal o~ ~n adapter, and how to change over processing to correspond -to the adapter by utilizing an identification signal of the adapter upon the detection. However, it does not sugyest any modification of information in the system configuration of a computer. In addition, when resetting is necessary, it is performed by the insertion or removal of the adapter. Furthermore, JPUPA No. 59-1~4521 discloses on-line reconfiguration of system configuration.
However, all of the above embodiments fail to suggest automatic modification of system configuration information without intervention of -the user when an adapter is inserted or removed, a]ong with installation of the necessary device driver, if any, so as to reconfigure the system.
It is bein~ strongly demanded that the configuration of a system such as a personal computer should be modifiable by inserting or removing an adapter while supplying power to or runrling the system. In particular, this is being strongly demanded for the portable personal computers that are recently emerging for which, because they have a fewer number of adap-ter slots in view of space, the configuration should he freely modifiable for the applications being used. It should be noted -that the system running state as used here;n means not only the state where the operatlng system indicates a prompt for a command, but also the state where an app]ication program is operating.
This .inven-tion is made in view of the above circumstances. It is intended to provide a computer system which allows insertion or removal of an adapter in the system running state, and wherein the system is automatically reconfigured :in accordance with insertion or removal of adapters.
To attain -the above object, according to this invention, a system is provided with an adapter detection mechanism that detects insertion or removal of an adapter fo.r expansion ~all adapters for a computer including JA9-91-505 3 ~ ~(J~ J

simple adapters for memory ancl adapters for peripheral device such as communicat:ion aclapters). The adapter is provided with a memory Eor storJ.n-~ its attribute information there;.n. The computer system ~urther comprises a means for electricall.y and mechanically separating the adapter, and a means (proyram) for monitoring the running state of the adapter when it is attempted to insert or remove the adapter so that the adapter can be inserted or removed while the computer sy,stem is running. In -the following, the means ~program) for monitoring the running state of the adapter is called a resource manager.
When the adapter is inserted, the adapter detection mechanism informs this fact to -the resource manager with an interrupt or the llke. The resource manager mechanically and electrically connects the adapter to the system immediately after insertion of the adapter, performs the necessary setup, inclusion of the device driver, which the system requires, and assignment of memories or the like by reading -the adapter attribute information from the memory on the adapter, and allows an application program to use -the adapter.
When the user wants to remove the adapter, he or she press an adapter remove button or ;ssues a remove request to the resource manager Erom the proyram. This request is transferred to the resource man~ger, whlch then checks the running state of the adapter, and, if it can be removed, allows it to be removed by disconnecting it first electrically and -then mechanically. The user of the computer system can remove the adapter after it is disconnected. If data is being written to a device such as a hard disk, the remove re~uest is suspended until the adapter becomes non-operational. At the same time as the adapter is removed, the device driver, i:E it is included, is informed of the fact that the device is disabled.
Then, even if -there is a request for -the device, the device driver returns a repl~ that there is no such device, or the device driver i-tselE is removed.
~ s described, according to this invention, it becomes possible to remove all adapters while the power A, .~ ~

is supplied for the system, and to automatically enable them to be used from the view poinl- of the user.
Now, an embodiment of this invention will be e~plained in the ~ollow:iny by referriny to the dra~"inys, wherein:
Fig. ] is a perspective view showiny the appearance of an embodi~ent of this inven-t,ion, and its state in use;
Fig. 2 is a block diayram showing the internal configuration of the embodiment;
Fig. 3 is a diagram showing -the c~nnection area for an adapter for the embodlmnet;
Fig. 4 is a diagram as in Fig. 3 but including the controlling switches for the connection;
Fig. 5 is a diagram i]lustrating a software configuration for the embodiment;
Fig. 6 is a diagram illustrating system configuration information;
Fig. 7 is a flowcharl, illustrating operation when inserting the adapter;
Fig. 8 is a flowchart illus-trating operation when removing the adapter;
Fig. 9 is a perspective view illustrating a modification of the embodiment;
Fig. 10 is a diagram illustrating another modification;
Fig. 11 is a diagram further illustrating the modification of Fig. 10.
Figure 1 show~ the appearance of an embodiment in use. In the figure, a memory adapter 21 and a video camera adapter 22 are inserted :into slots (not shown in the figure) of a portable computer 1, The video camera adapter 22 is attached -to a video camera 3. Th~ portable compu-ter 1 has two slots for adapters. These slots are general purpose, and can attach to various adapters such as communication adapters, in addition to the memory adapter 21 and the video camera adapter 22.
Figure 2 shows an example of configuration of the computer 1 and the adapter 2. In -the figure, a CPU 4, a memory 5, and an I/0 devi.ce 6 such as the keyboard of the computer 1 are attached to a system bus 7. Attached to 2 ~

an expansion bus 8, which i.s connected to the ~ystem bus 7~ are an electrical connector g, a mechanical connector and an adapter detection dev.ice 1.1. An ad~pter removal button 12 is provided n~a~ the ~l.ot. The adapter 2 has an adapter attribute information storage 13 in addition to a functi.onal block for its applica-tion (for example, a memory block in the case of memory adapter, which is not shown). The adapter a-ttribute information storage 13 stores adapter IDs and o-ther information.
Figure 3 shows a connection area 2a of the adapter 2 in Figure 2. Thia connection area 2a is inserted into the slot of the portable computer 1.. ~he connection area 2a has a signal line 14, a power supply line 15, and an adapter detection line 16 at its end. When the connection area 2a of the adapter 2 is inserted into the slot, the adapter detection device 11 (Figure 2) detects the insertion of the adapter 2 by utilizing the adapter detection line 16. In response to this, the mechanical connector 10 of the portable computer 1 (Figure 2) mechanically connects the adapter 2 to the portable computer 1 by driving an adapter lock mechanism lOa.
Figure 4 shows the arranyement of the electrical connector 9 in Figure 2. In the figure, a switch 9a of the electrical connector 9 is designed to control the connection between the signal line of the adapter 2 and a signal line of the portable computer 1.
When the user presses the adapter removal button 12 to remove the adapter, the elec-trical connector 9 and the mechanical connector 10 are controlled -to shut down electrical connection and to release the lock of the adapter lock mechanism lOa.
Although Figure 2 shows only one set of the electrical connector 9, the mechani.cal connector 10, the adapter detection device 11, and the adapter removal button 12, two sets of them may be provided when two slots are provided, as in this embodiment. If the number of slots are further increased, it is sufficient to provide the corresponding number of sets.
Figure 5 shows the software configuration of the portable computer 1. In the fiyure, device drivers 17 are prepared for the attached adapters 2. A resource manager 19 is provided be-tween ~he dev:ice drive~s 17 and an operating system 1~. The resollrce manager 19 monitors insertion or removal of the a~apter 2~ and manages system configuration information in Figure 6 and the device drivers 17. The resourc~ mana~er lg will be explained later in detail b~ particularly referriny to Figures 7 and 8. An application program 20 ls executed under the support of the operating system ]8.
Next, the operation of thls embodiment will be explained. First, the operation when an adapter 2 is inserted by referring to Figure 7 will be explained. In the figure, when the user inserts an adapter 2 into an empty slot, inser-tion of the adap-ter 2 is informed to the resource manager 19 through a means such as an interrupt (Step Sl). In response to this, the resource manager 19 mechanically locks the adapter 2a with the adapter lock mechanism lOa (Step S2). At the same time, power is supplied to the adapter 2. After mechanical connection and supply of power, the adapter 2 is electrically connected to the portable computer 1 (on the signal level) (Step S3). This two stage connection on the power supply level and the signal level suppresses generation of noise or the like in t.he system unit when the adapter is connected. After mechanical and electrical connections, an adapter ID is read out from the adapter information storage 13 on the adapter 2 for checking whether or not the adapter can be connected to the system unit (Steps S~ and S5). If so, fur-ther necessary adapter attribute information is read out from the adapter attribute information storage 13 to perform necessary setting for the adapter 2 and installation of a necessary device driver 17 (Step S6). In the e~ample of Figure 7, after the adapter attribute lnformation i.s read out, the resource manager 19 sets up an l/0 address, a memory address, and an interrupt level for the adapter 2 so that they do not compete with other resources (Step S7).
Furthermore, a device driver 17 is read out and included in the OS 18, and a work area is set up (Steps S8 and S9). Then, the resource manager 19 initializes a register or the like for the adapter, or, if resetti.ng is specified, reads and resets it, anrJ transfers con-trol to the OS 18 or the application program 20 be~ore in~errupt after setting an aclapter enabling ~lay (Steps S10 - S12).
If the adapter 2 cannot ~e llaed, or :if it cannot be used even if it is connected because of the system configuratlon (insufficient mounted memories, too small capacity of necessary ~ile device, or no necessary input/output device), the resource manager 19 electrically and mechanically .separates the adapter 2 once connected, and then the adapter 2 is finally disconnected.
The operation when the adapter 2 is removed will be explained in the following by referring to Figure 8. In the figure, when the user presses the adapter removal button 12, its signal is transmitted to the resource manager 19 (Step S21). Although, in this example, the operation is initiated when the user presses the adapter removal button 12, the adapter can be also removed when the user issues an adapter removal request from a device such as a keyboard or a mouse, or when an application program issues an adapter removal request. After receiving the adapter removal request, the resource manager 19 checks whether or not the adapter 2 is in use.
If so, the manager is caused to wait until completion of use (Step S22). In a case where it is specified to reset the adapter enabling flag and -to reset the register or the like when the adapter is no longer in use, the resource manager stores the register in a nonvolatile memory or a secondary storage, and then releases the device driver, the work area for the device driver, and the like (Steps S23 - S25). Furthermore, it releases the I/0 address, memory address, interrllpt level and -the like which the adapter has used (S-tep S26), electrically and mechanically disconnects the adapter, and transfers control to the OS or application proyram (Steps 27 - 29).
This enables it to suppress generation of noise and the like on si~nal lines in the system when the adapter is removed. After mechanical removal, the lock of the adapter 2 is released so -that the ~Iser ~an freely remove the adapter Modificati.ons of the above--mentioned embodiment will be explained in the followiny.
Figure 9 shows a modification in which an expansion unit 21 is connected to the portable computer 1, and a larger number of adapters 2 can be connected to the portable computer 1 by utilizing slot.s in the expansion unit. Even in this case, the resource manager 19 automatically reconfigures the system in response to detection of insertion or removal of an adapter 2 into the e~pansion unit 21.
Figure 10 shows an examp].e for constituting a portable computer 1 by combining a system unit 22 and a display unit 23. In thi~ example, -the .system unit 22 is, for example, of A5 size, and the display unit 23 is also of A5 size. The display unit 23 contains the functions of the adapter of the previous example, and has a display section such as a liquid crystal display device, a display controller, and an attribute storage device. The system unit 22 reconfigures lts configuration according to attachment of the display llnit 23 by utilizing information in the attribute storage device. If a display unit 24 of A4 size shown ln Figure 11 is used in the arrangement of Figure 10, the display unit 23 of A5 size of Figure 10 is removed, and the display unit 24 of A4 size of Figure 1.1 is attached in place. In response to this, the system unit 2~ performs reconfiguration of the system for the A~-sized display unit 24. In this case, because the display controller section is provided in the display units 23 anl 24 instead of in the system unit, it is easy to change the ~isplay unit from 23 to 24 or vice versa. The display units 23 and 24 may have tablet functions.
According to this invention, an adapter can be inserted or removed while keeping a computer system operational. In addition, handling of adapters becomes very easy because any type of adapter is automatically incorporated in the system for the user.

Claims (19)

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:
1. A computer system, having a main housing with one or more slots for connection of peripheral device adapters, and comprising one or more adapters insertable into said slots, said system also containing means for storing configuration information enabling said system to cooperate with said adapters when they are attached to said one or more slots, an arrangement for dynamically reconfiguring said computer system when an adapter is inserted into an empty one of said one or more slots, or when an adapter is removed from one of said slots, while the system is fully powered and initialized for running application programs, said arrangement comprising:
means interactive with users of said computer system and coupled to said slots for controllable permitting removal of a said adapter from any one of said slots containing an adapter, while said system is actively powered and fully initialized and without requiring rebooting or reinitialization of said system;
said interactive means including means operative during removal of a said adapter from said any one slot for adjusting said stored configuration information to reflect removal of said adapter from the respective slot;
means coupled to said slots for detecting insertion of a said adapter into a formerly empty one of said slots; and means cooperative with said insertion detecting means for altering said stored configuration information to conform to the presence of said inserted adapter in said formerly empty one of said slots.
2. The dynamic reconfiguration arrangement as claimed in claim 1 wherein said means cooperative with said insertion detecting means comprises:
means responsive to detection of insertion of a said adapter into a said formerly empty one of said slots, for controlling the adapter inserted into said formerly empty slot to exchange information signals with said computer system, including information signals representing attribute information stored by said inserted adapter.
3. The dynamic reconfiguration arrangement as claimed in claim 1 having one or more user operated switch elements associated with said slots for enabling a user of said computer system to signal intention to remove an adapter from one of said slots;
said intention signal when activated by a said user prompting said means interactive with said users to temporarily prevent removal of said adapter from the respective any one of said slots, and to delay said adjusting of said stored configuration information relative to the respective slot, until said computer system has completed any data transfer operations that were being conducted relative to said respective slot when said intention signal was activated.
4. The dynamic reconfiguration arrangement as claimed in claim 3, having means located in the vicinity of each of said slots for releasably locking adapters inserted into respective said slots into physically secure coupling with respective slots; said means for releasably locking being controllable by said means cooperative with said insertion detecting means to lock an adapter that is being inserted into a said respective slot prior to said altering of said stored configuration information; said means for releasably locking also being controllable by said means interactive with users of said computer system, in response to activation of said intention signal relative to said respective slot, to maintain said locking means in engagement with the adapter in said respective slot until any operation started relative to the respective slot prior to activation of said intention signal has been completed, and thereafter to release an adapter for removal from said respective slot.
5. The dynamic reconfiguration arrangement of claim 2 wherein said computer system receives interruption signals at plural different interrupt priority signalling levels from components of said system, and said computer system contains a memory subsystem and a multichannel direct memory access controller, and a bus coupled to said slots which is accessible to adapters plugged into said slots via a predetermined arbitration procedure; and wherein:
said attribute information stored by each said inserted adapter includes an identification number of the respective adapter, and said information signals exchanged with each said inserted adapter include information transferred from said computer system to registers in the respective adapter defining an available interrupt priority signalling level to be used by the respective adapter for requesting interruption of the computer, an arbitration level to be used by the adapter for competing with other system resources for use of said bus, a designation of a direct memory access channel through which information is to be subsequently transferred between the respective adapter and said storage subsystem, information defining the location of a register on the respective adapter which can be addressed as a discrete device, address information defining the mapping of locations in a memory in said adapter into the aggregate memory addressing space of said storage subsystem, adapter state information retained by said computer system in a non-volatile register, for enabling said computer system to resume and restart operations partially completed relative to said respective adapter prior to its last removal from a said slot when the adapter is reinserted into a said slot, and information identifying one or more device drivers for said respective adapter or devices controlled by said respective adapter.
6. The arrangement of claim 5 wherein said device drivers are transferred during initial installation of a said respective adapter from said respective adapter into a storage unit peripherally attached to said computer system.
7. The arrangement of claim 1 wherein adapters insertable into said slots include adapters integral to one or more display units.
8. The arrangement of claim 7 wherein said one or more display units have different dimensions allowing for providing display images of different sizes to said users of said computer system.
9. A computer having one or more slots for holding one or more expansion adapters, comprising:

means for detecting insertion of a said adapter into a said slot;
means for mechanically locking a said inserted adapter into said slot in response to a detection signal from said means for detecting insertion, means for supplying power to said adapter in response to a detection signal from said means for detecting insertion; means for connecting said inserted adapter and said slot for interchanging information signals in response to a detection signal from said means for detecting insertion;
means for exchanging predetermined information signals with said inserted adapter in response to a detection signal from said means for detecting insertion;
means for modifying configuration information of said computer to prepare said computer and adapter for cooperating as a system;
means for requesting removal of a said inserted adapter from a said slot;
means responsive to said request for removal for exchanging predetermined information with the respective said inserted adapter, said information being useful to modify said system configuration information to conform said system to the removal of said respective adapter;
means for shutting down signal communication between said respective adapter and said slot in response to said request;
means for disconnecting power from said respective adapter in response to said request; and means for releasing mechanical locking of said respective adapter to said slot in response to said request so as to free said adapter for removal from said slot.
10. A computer as claimed in claim 9, wherein said means for requesting removal of said expansion adapter from said slot comprises an adapter removal button.
11. An expansion adapter for insertion into an expansion slot of a computer system, said adapter comprising:
storage means for storing attribute information characteristic of the respective adapter that is necessary for enabling said computer to reconfigure automatically in conformance to said respective adapter when said respective adapter is inserted into said expansion slot; and a connector with plural conductors for making electrical contact with said computer system via said expansion slot; said connector conductors including:
an insertion indicating conductor for enabling said computer to detect insertion of said respective adapter into said expansion slot;
a power supply conductor for supplying power from said computer to said expansion adapter via said expansion slot; and signal transfer conductors for conveying signals between said respective adapter and said computer via said expansion slot;
said conductors being designed to contact corresponding conductors of said computer system in said expansion slot, and also being of different lengths such that, during insertion of said adapter into said expansion slot, said insertion indicating conductors make contact with corresponding conductors in said expansion slot before either said power supply conductor or said signal transfer conductors contact their respective corresponding conductors; and said power supply conductor makes contact with a corresponding conductor before any of said signal conductors make contact with their corresponding conductors.
12. An expansion adapter as claimed in claim 11, wherein said computer system receives interruption signals at plural different interrupt priority signalling levels from components of said system, and said computer system contains a memory subsystem and a direct memory access controller controlling access to said subsystem through a plurality of channels, and a bus coupled to said slots which is accessible to adapters plugged into said slots via a predetermined arbitration procedure; and wherein:
said attribute information includes an identification number of said adapter, information on an available interrupt level to be used by said adapter when interrupting said computer, an arbitration level to be used by said adapter for arbitrating for access to said bus, a direct memory access channel to be used for conveyance of data between said adapter and said memory subsystem, information on an I/O register which can be set by a program, address information on a memory on said adapter, information on a register in said computer to be used for saving information about the state of said adapter when last removed from a said slot, which saved information can be used by said computer to resume and restart processes that the adapter was performing when last removed upon subsequent reinsertion of the respective adapter into a slot, and information on one or more device drivers for said adapter.
13. An expansion adapter as claimed in claim 12 storing one or more device drivers and adapted for supplying said device drivers to said computer when the adapter is inserted into a said slot.
14. An expansion adapter as claimed in claim 11 which is an integral part of a display unit.
15. An expansion adapter as claimed in claim 14, wherein said display unit comprises a display screen and a display control section which interfaces between said integral adapter and said display screen.
16. An apparatus for system reconfiguration of a computer that has one or more slots for holding one or more expansion adapters, comprising:
means for detecting insertion of said expansion adapter into said slot;
means for mechanically locking said expansion adapter in said slot in response to a detection signal from said detecting means;
means for supplying power to said adapter in response to a detection signal from said detecting means;
means for connecting said expansion adapter and said slot on a signal level in response to a detection signal from said detecting means;
means for exchanging predetermined information with said expansion adapter in response to a detection signal from said detecting means, and for modifying system configuration information of said computer based on said attribute information stored on said expansion adapter;
means for requesting removal of said expansion adapter from said slot;

means responsive to each said removal request for exchanging predetermined information with said expansion adapter to modify system configuration information of said computer;
means for blocking signal communication paths between said expansion adapter and said computer, via said slot, in response to said request;
means for shutting down power supply to said expansion adapter in response to said request; and means for releasing mechanical locking of said expansion adapter relative to said slot in response to said request.
17. A method for system reconfiguration of a computer that has one or more slots for holding one or more expansion adapters, comprising steps of:
detecting insertion of said expansion adapter into said slot;
mechanically locking said inserted adapter in said slot in response to detecting said insertion;
supplying power to said expansion adapter in response to detecting said insertion;
connecting said expansion adapter and said slot for interchange of information signals in response to detecting said insertion;
exchanging predetermined information between said inserted adapter and said computer, via said slot, in response to detecting said insertion; and modifying system configuration information of said computer based on attribute information stored in said expansion adapter and transferred to said computer in said exchanging step;
requesting removal of an inserted said adapter from a said slot;
exchanging predetermined information with said adapter in response to said request;
modifying system configuration information of said computer in response to said exchanged information;
blocking signal communication between said expansion adapter and said computer via said slot, in response to said request;
shutting down power supply to said expansion adapter in response to said request; and releasing mechanical locking of said expansion adapter relative to said slot in response to said request.
18. An arrangement driven by program for controlling dynamic reconfiguration of a computer system having one or more expansion slots for holding one or more expansion adapters, said arrangement comprising:
means integral to said computer system, and operable at any time, while said system is powered up and in use, for invoking and interpreting a configuration controlling program in response to actions occurring during insertion and removal of expansion adapters at any said expansion slot; and configuration means invocable and interpretable by said integral means; said configuration means containing said configuration controlling program; said configuration controlling program, when interpreted by said integral means, directing said computer system to perform a predetermined sequence of reconfiguring functions relative to the system formed by the computer system and expansion adapters of various types attached to said expansion slots, said configuration means including means for directing an exchange of predetermined information between said computer and an adapter in response to insertion of the adapter into a said expansion slot, or in response to a signal from a user of the respective computer system indicating intent to remove an adapter from a said expansion slot, said predetermined information including attribute information, defining attributes of the adapter being inserted or removed, which is needed by said integral means to locate or modify configuration information stored in said computer system in association with the respective said expansion slot into which a said adapter is being inserted or containing a said adapter intended to be removed.
19. A reconfiguring arrangement in accordance with claim 18, wherein:
said computer system receives a predetermined interruption when a said adapter is being inserted into a said expansion slot or when a said user of said system signals intent to remove a said adapter from a said slot and wherein said received interruptions prompt said computer system to transfer control of said computer system to said integral means and said configuration means.
CA002082118A 1992-01-20 1992-11-04 Computer, and apparatus and method for system reconfiguration thereof Expired - Lifetime CA2082118C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP4007527A JPH0821015B2 (en) 1992-01-20 1992-01-20 Computer and system reconfiguring apparatus and method thereof
JP7527/92 1992-01-20

Publications (2)

Publication Number Publication Date
CA2082118A1 CA2082118A1 (en) 1993-07-21
CA2082118C true CA2082118C (en) 1999-01-19

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