JPH1124643A - Display device initialization method and computer system using the method - Google Patents

Abstract

(57) Abstract: A method for initializing a display device and a computer system using the same. Provided is a display device initialization procedure that enables a display device having unknown specifications to be used without changing the BIOS design. A BIOS executed for initialization in an activation circuit includes an independently exchangeable display information table, and first sets the contents of the display information table in a register buffer in a non-procedural manner. Are set in the register set 33 of the display control circuit 32 using the register transfer circuit 35. [Effect] Since the initialization procedure of the BIOS 13 is constant irrespective of the contents of the display information table 36, even if the display device 15 is replaced with a different specification, the BIOS 1
3 does not need to be changed, and even if the specifications of the display device 15 are unknown at the time of designing the BIOS 13, it is possible to respond at a later date.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for initializing a display device, and more particularly, to a computer system using the method for initializing a display device.

[0002]

2. Description of the Related Art As a display device of a conventional computer system, a CRT (Cathode-Ray Tu) is used.
A CRT display using be) is generally used. The CRT display has a structure in which an electron beam sequentially scans the display area, and the brightness of an arbitrary position on the CRT can be changed by changing the intensity of the electron beam. With this structure, there is in principle no restriction on the resolution or the number of colors, and there is an advantage that a display device with high resolution and multi-tone coloring can be designed relatively easily according to the application. However, since the CRT is heavy and consumes a lot of power, it is difficult to incorporate the CRT into a portable information device. For this reason, instead of CRTs, LCDs (Liquid Crystal
lDisplay) has been increasingly used. For example, a laptop personal computer or the like as a portable information device has a built-in LCD display and can connect an independent CRT display to the outside.
Some devices have been used that can switch between D displays and can simultaneously display a CRT display and an LCD display. Simultaneous display of a CRT display and an LCD display is mainly used when giving a presentation using a large-screen projector device compatible with CRT monitor input.
There are advantages such as improved operability of a personal computer when used in combination with a display.

As a display device, in addition to an LCD display, EL (Electro Lumine) is used.
In recent years, an EL display device using a device, a plasma display device using plasma emission, and the like have been spotlighted as new display devices.

[0004] These new display devices are not necessarily circuit compatible with existing CRT displays. Therefore, its use requires control by a method suitable for each display device.

When starting up a computer system including these various types of display devices,
First, the hardware connected to the computer system needs to be initialized. Examples of hardware connected to the computer system include an external storage device such as a hard disk and an input device such as a keyboard in addition to the display device described above. From the point of view, the initialization of the display device often has to be performed prior to the initialization of other devices.

[0006] A system program required for initializing the display device is BIOS (Basic).
c Input Output System) is used. The BIOS is automatically executed first when the computer system is started, and initializes the display device. Further, even after startup, the service of hardware-dependent processing is provided in the form of an interrupt handler or the like, and serves to easily and standardize the hardware reference of the OS and the application.

FIG. 7 shows the configuration of a conventional computer system. As shown in FIG.
M11 (Read Only Memory) and RAM1
2 (Random Access Memory), and the ROM 11 which is a non-volatile memory has a BIOS 1
3 is included. Also, a startup circuit 14 for automatically executing the BIOS 13 at startup is connected. Startup circuit 1
4 automatically sets the program execution address of the computer system to the entry address of the BIOS 13 when the computer system starts up, and plays a role of operating the BIOS 13 immediately after the startup. BIOS 13 in ROM 11
Changes the work area and stack area for execution
It is arranged on M12. A display device 15 is also connected to the computer system. The hardware setting of the display device 15 can be directly controlled from the BIOS 13.

[0008] Immediately after the computer system is started, the BIOS 13 started by the start circuit 14 is controlled by the BIOS 13
The hardware of the computer system is sequentially initialized according to a specific procedure programmed in S13. BIOS
When the computer 13 initializes the display device 15, the BIOS 13 executes a predetermined initialization procedure of the display device 15 when the computer system is started up. For example, as described in Japanese Patent Application Laid-Open No. Hei 7-230261, an LCD panel parameter is generated from a table item of the LCD panel according to the detection result of the determination circuit after referring to the type identification circuit of the LCD panel. . As described above, in the related art, it is necessary to generate parameters by calculation in accordance with the specifications of the display device or to initialize the parameters while making a condition determination.

[0009]

However, in the above-described conventional method of initializing a display device, the display device is usually programmed assuming one specific type of specification. When exchanging for an unknown specification that is not taken into account at the time of BIOS design, the parameter calculation formula is different.
Alternatively, since the procedure for determining the conditions is different, it is necessary to change the design of the BIOS in accordance with the specifications of the display device each time. Therefore, a computer system including such a BIOS can easily replace the device with a display device whose specifications are unknown. Could not be done.

[0010] In addition, a change in the design of the BIOS adapted to a display device having such an unknown specification often involves a change in the program flow, and there is a danger of causing a program error at this time, which lowers the reliability of the system. There was a danger of doing.

If the initialization flow changes due to a change in the specification of the display device to be connected, the size and the number of execution steps of the BIOS change according to the specification of the display device and are not constant in the conventional method. This means that the storage location of the entire BIOS program is changed, and that the time required to execute the BIOS program changes, and this means that the entire BIOS code that is not related to the display initialization is changed. affect. As a result, there is a problem that the overall reliability of the computer system is affected.

[0012] For a BIOS having a procedure for initializing a plurality of display devices in a BIOS as disclosed in, for example, JP-A-7-230261, the specifications of all the plurality of display devices are determined when the BIOS is designed. For example, it is not possible to incorporate initialization information of a new display device whose specification does not exist at the time of BIOS design. In addition, the number of data that can be incorporated is limited, and a large amount of data about a display device that is usually used in a computer system is stored in the BIOS. As a result, the size of the BIOS becomes large and it becomes difficult to incorporate the data into the computer system. There was a problem.

Therefore, a computer system using the above-mentioned conventional display device initialization method cannot cope with a display device which is not taken into consideration at the time of design, and has a huge BIOS to support various display devices. However, there is a disadvantage that a memory device for performing the operation is required.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method of initializing a display device that does not require a BIOS design change when changing the display device.

Further, even if the specifications of the display device change, the processing portion of the BIOS display device and the BIOS
It is an object of the present invention to provide a method of initializing a display device that does not affect a control portion of another device in S by a program change.

The present invention also relates to a display device whose specification cannot be specified when designing the BIOS.
It is an object of the present invention to provide a method of initializing a display device that does not require redesign of the display device.

Another object of the present invention is to provide a method of initializing a display device that can minimize the BIOS size even when a plurality of display devices are used.

Another object of the present invention is to provide a computer system provided with a method for initializing a display device having the above-mentioned features.

[0019]

According to the method for initializing a display device according to the first aspect of the present invention, at least one method is provided.
In the initialization means for initializing one display device, the display device is initialized by a BIOS program, and the BIOS program stores initialization information for initialization of the display device as a table in a nonvolatile memory. The table can be exchanged with the display device, and the initialization procedure is constant regardless of the contents of the table.

According to the present invention, the initialization procedure is constant irrespective of the contents of the table. Therefore, even if the display device is replaced with an unknown specification which is not taken into consideration at the time of BIOS design, the BIOS does not need to be replaced. There is an effect that no design change is required.

According to the method for initializing a display device according to the second aspect of the present invention, the initialization procedure reads an update table from an external storage device, compares the general update table with the table, and determines a difference in the comparison result. If there is, the contents of the table are replaced with the contents of the update table, and in the subsequent initialization, the display device is initialized based on the updated information of the table.

According to the present invention, the update table of the initialization procedure can be read from the external storage device, and the display device can be initialized based on the information of the table, so that there is no specification when designing the BIOS. There is an effect that initialization information of a new display device can be incorporated.

According to a third aspect of the present invention, the external storage device is exchangeable with the display device.

According to the present invention, both the update table on the external storage device and the display device are interchangeable.
There is an effect that display devices of various specifications can be initialized by incorporating only one data into the IOS.

According to the display device initialization method of the fourth aspect of the present invention, there are at least two display devices, and part or all of the table is commonly used by at least two or more display devices. It is characterized by being performed.

According to the present invention, some or all of the initialization information of a plurality of display devices can be shared.
There is an effect that the size of the BIOS can be minimized.

According to the computer system of the fifth aspect of the present invention, even if the display device is replaced with an unknown specification which has not been taken into consideration when designing the BIOS, the design of the BIOS is not required to be changed. It has the advantage of being expensive and easy to maintain.

Further, since it is possible to incorporate initialization information of a new display device whose specification does not exist at the time of BIOS design, there is an advantage that it is possible to correspond to a newly developed display device.

Further, since both the display device and the update table can be exchanged, there is an advantage that the display device can be replaced and used according to the application.

Further, since the BIOS size can be kept to a minimum even when a plurality of display devices are used, there is an advantage that a large amount of information can be displayed even in a small system.

[0031]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a diagram showing an embodiment of a method for initializing a display device according to the first aspect of the present invention. In the present embodiment, the display device 15
Is controlled by the display control circuit 32. The display control circuit 32 is a register set 3 for holding parameter information for controlling the display device 15.
Have three. The register set 33 includes a plurality of register groups, and includes information such as the number of horizontal display digits, the number of vertical display digits, and the number of colors, which are basic information of the display device 15, as well as the data transfer timing unique to the display device 15 and the control circuit itself. Display control circuit 3 for operation start / stop control
2 holds all information that determines the operation. That is, the register set 33 can hold information for initialization of all types of display devices that can be controlled by the display control circuit 32.

The display control circuit 32 also has a register buffer 34 for temporarily storing information before setting the information in the register set 33.
5 transfers the contents of the register buffer 34 to the register set 33 at the timing designated. The register buffer 34 can be read and written by the BIOS 13 in the ROM 11. Register transfer circuit 3
5 is controllable by the BIOS 13, and the contents of the register buffer 34 can be transferred to the register set 33 at a specific timing permitted by the display control circuit 32. As the transfer timing, for example, a vertical blanking period, which is a non-display period of the display device 15, is used. This means that the register transfer circuit 35
When enabled by the IOS 13, the register transfer circuit 35 waits until the display data currently being drawn is completely completed for one frame period, and after the frame drawing is completely completed, the contents of the register buffer 34 are stored in the register set 33.
This is realized by such a process as to be reflected in At this time, for example, when it is necessary to set the register set 33 by a specific procedure in terms of hardware of the display control circuit, for example, a certain clock stabilization is necessary for adjusting a clock generation source (not shown) incorporated in the display control circuit 32. When a procedure such as waiting for time is required, the register transfer circuit 35 generates the necessary procedure in hardware. Accordingly, there is no hardware restriction when the BIOS 13 sets the information in the register buffer 34, and therefore, no procedure is required.

In order to prevent electrical damage due to improper application of a control signal to the display device 15, the display control is stored in the register set 33 immediately after the computer system is started until the register transfer circuit 35 operates for the first time. A default setting for generating a blank signal so that the circuit 32 does not perform any image display on the display device 15 is preset.

The BIOS 13 is executed by the activation circuit 14 when the computer system is activated. The BIOS 13 initializes the entire computer system, but initializes the display device 15 relatively early in the initialization process. At the time of initialization, the display information table 36 of the BIOS 13 itself is referred to, and the contents are written in the register buffer 34 of the display control circuit 32. As described above, no procedure is required for setting information in the register buffer 34.

In the present embodiment, the ROM 11 containing the BIOS 13 is designed to be mechanically detachable from the computer system, and can store a display information table 36 conforming to the specifications of the display device 15. Only the display information table 36 of the BIOS 13 can be edited by a dedicated ROM writer (not shown). The dedicated ROM writer is designed to rewrite only the display information table 36 and does not change other BIOS codes. This gives B
The display information table 36 adapted to the specifications of the display device 15 can be mounted on the computer system without deteriorating the software reliability of the IOS 13.

After setting all necessary information of the display information table 36 in the register buffer 34, the BI
The OS 13 instructs the register transfer circuit 35 to set information. More specifically, the register transfer circuit 35 operates by setting a specific bit of a specific port of the computer system, and transfers the contents of the register buffer 34 to the register set 33 during the first vertical retrace period after startup. Accordingly, the display control circuit 32 controls the display device 15 in accordance with the updated information of the register set 33 from the next display frame.

(Embodiment 2) FIG. 2 is a diagram showing a first embodiment of a method for initializing a display device according to the second aspect of the present invention. Display device 1 as in FIG.
5 is controlled by a display control circuit 32, and the display control circuit 32 includes a register set 33, a register buffer 34, and a register transfer circuit 35.

In this embodiment, the BIOS 13 uses the EPRO
Built in M41. The EPROM 41 is an electrically rewritable flash ROM, and an EPROM program circuit 42 for controlling rewriting of the EPROM 41.
And BIOS by the EPROM program control circuit 43
All or some of the 13 may be changed.

The BIOS 13 includes a display information table 36, and the display information table 36 has a table header 44. The table header 44 includes a table ID 45, a table name 46, and a record length 47. The BIOS 13 initializes the external storage device 48 before the display device 15 is initialized. At this time, the BIOS 13 scans whether the external initialization device 48 contains data to be set in the table header 44. More specifically, after initializing the external storage device 48 to a readable state, the display device information 49 recorded in a specific record record of the external storage device 48, for example, a specific part of a boot sector, is read out. It is checked whether the head information matches the table ID 45 and the table name 46 of the table header 44. If they match, the contents of the display information table 36 and the contents of the external storage device 48 are compared by the record length 47, and if different, the information of the record length 47 from the external storage device 48 is It is regarded as a record including the device information and is written in the display information table 36. More specifically, BIO
In step S13, the record is stored in the RAM 1 from the external storage device 48.
The control is transferred to the BIOS rewriting routine 50 included in the BIOS 13. BIOS rewrite routine 50
Supplies a process of writing the record at the designated position in the RAM 12 to the designated position in the EPROM 41. Writing is EPROM
This is executed by operating the EPROM program circuit 42 through the program control circuit 43. After the writing to the EPROM 41 is completed, the EPROM program control circuit 43 operates the starting circuit 14. The activation circuit 14 executes the BIOS 13 again. When the BIOS 13 initializes the external storage device 48 again, the comparison between the tables described above is performed again. If there is no difference in the data as a result of comparing the data between the tables, the BIOS 13 does not execute the BIOS rewriting routine 50 and proceeds to the initialization of the display control circuit 32. Initialization of the display control circuit 32 is performed in the same manner as in the first embodiment.

(Embodiment 3) FIG. 3 is a diagram showing a second embodiment of the method for initializing a display device according to the second aspect of the present invention. Display device 1 as in FIG.
5 is controlled by a display control circuit 32, and the display control circuit 32 includes a register set 33, a register buffer 34, and a register transfer circuit 35.

As in the case of FIG.
Built in. The EPROM 41 can be rewritten by an EPROM program circuit 42 and an EPROM program control circuit 43. The BIOS 13 has a table header 44 in the display information table 36, and the table header 44 includes a table ID 45, a table name 46, and a record length 47.

In the present embodiment, the BIOS 13 also includes a ROM 54 including display device information 49 through an address bus 52 and a data bus 53 for referring to an image memory 51 for holding contents to be displayed on the display device 15 by the display control circuit 32. Can be referred to. In the present embodiment, the ROM 54 is mechanically replaceable together with the display device 15. For example, the display device 15 and the ROM 54 are integrated by mounting the ROM 54 on a printed circuit board in the display device 15 via a socket. It is also possible. Further, the ROM 54 can be arranged independently of the display device 15 and can be designed to be detachable from the computer system as required.

When initializing the display device 15, the BIOS 13 reads out the contents of the display device information 49 in the ROM 54 through the display control circuit 32, and checks whether the display device information 49 contains data to be set in the display information table 36. Scan for it. More specifically, display device information 4
A check is made to see if the top data of the contents No. 9 does not match the table ID 45 and the table name 46 of the table header 44. If they match, the contents of the display information table 36 and the display device information 4
9 are compared, and if they are different, the information of the record length 47 from the display device information 49 is written in the display information table 36. More specifically, BI
The OS 13 once fetches the display device information 49 from the ROM 54 into the RAM 12, and stores the BIOS 13 in the BIOS 13.
The control is shifted to the OS rewriting routine 50. The BIOS rewrite routine 50 stores the record at the designated position in the RAM 12 in the EP
A process for writing to a designated position in the ROM 41 is supplied. Writing is performed by EPRO through the EPROM program control circuit 43.
This is executed by operating the M program circuit 42.
After the writing to the EPROM 41 is completed, the EPROM program control circuit 43 operates the starting circuit 14. The activation circuit 14 executes the BIOS 13 again. When the BIOS 13 initializes the display device 15 again, the comparison between the tables is performed again. If there is no difference in the data as a result of comparing the data between the tables, the BIOS 13
Does not execute the BIOS rewrite routine 50, and proceeds to the initialization of the display control circuit 32. Initialization of the display control circuit 32 is performed in the same manner as in the first embodiment.

(Embodiment 4) FIG. 4 is a view showing an embodiment of a method for initializing a display device according to the third aspect of the present invention. 1, the display device 15 is controlled by a display control circuit 32. The display control circuit 32 includes a register set 33, a register buffer 34, and a register transfer circuit 35.

The BIOS 13 stores the EPROM 4 as in FIG.
All or a specific part of the BIOS 13 can be changed by an EPROM program circuit 42 and an EPROM program control circuit 43 which are built in the EPROM 1 and control rewriting of the EPROM 41.

The BIOS 13 initializes the external storage device 48 before the display device 15 is initialized. In this embodiment, the external storage device 48 is detachable. Therefore, the BIOS 13 may detect that the recording medium including the display device information 49 is not connected to the external storage device 49. In this case, when the display device 15 is initialized, the BIOS 13 uses the display information table contained therein. Use 36. Also, when detecting that the external storage device 48 is connected to the system, the BIOS 1
3 is compared with the display information table 36 included therein, and if there is a difference, the BIOS rewriting routine 50
Display information table 36 in BIOS 13
Update of.

(Embodiment 5) FIG. 5 is a diagram showing an embodiment of a method for initializing a display device according to the fourth aspect of the present invention. The display device 15 and the secondary display device 61 are controlled by a display control circuit 32, and the display control circuit 32 includes a register set 33, a register buffer 34, and a register transfer circuit 35.

In this embodiment, the register buffer 34 includes the display device 15 and the secondary display device 6.
One piece of basic information can be managed.
The specifications of the display device 15 and the secondary display device 61 do not need to be the same, and they can be operated independently or both simultaneously. More specifically, a CRT display, 2
By assigning an LCD display to the next display device 61, for example, there is a form in which a notebook personal computer is used separately from an external monitor display.

The BIOS 13 includes a display information table 36, and the display information table 36 has a table header 44. The table header 44 includes a table ID 45, a table name 46, and a record length 47. The display information table is the display device 1
5 and a sub-table 63 corresponding to the secondary display device 61, and a shared sub-table 64 containing information shared by the display device 15 and the secondary display device 61.

By storing the shared information in the shared sub-table 64, the size of the entire display information table 36 is reduced. If the display device 15 and the secondary display device 61 can be initialized only with completely sharable information, the initialization can be performed using only the shared sub-table 64 without using the sub-tables 62 and 63. .

When the register transfer circuit 32 initializes the display device 15 and the secondary display device 61,
The display selection circuit 65 checks the display device to be used by the computer system. More specifically, the display selection circuit 65 includes, for example, a switch circuit having a latch function, and a small C that is backed up by a battery.
I / O reflecting bit information set in MOS memory
Port and the like.

After setting all necessary information of the display information table 36 in the register buffer 34, the BIOS 13 instructs the register transfer circuit 35 to set information. At this time, the BIOS 13 does not need to determine which display device is to be used, and therefore, no change in the procedure occurs even if the display devices are used in a plurality. The BIOS 13 has a display information table 36.
Is set in the register buffer 34, and a transfer instruction is given to the register transfer circuit 32.

The register transfer circuit 32 appropriately sets the sub-table 62, the sub-table 63, and the shared sub-table 64 in the register set 33 according to the designation of the display selection circuit 65. At this time, for example, the display device 1
When 5 is used and the secondary display device 61 is not used, only the sub-table 62 and the shared sub-table 64 are set in the register set 33. The sub-table 63 is not set, but instead sets a default built-in table that does not generate a signal. Display device 15
Is not used and the secondary display device 61 is used, only the sub-table 63 and the shared sub-table 64 are set in the register set 33. The sub table 62 is not set, but instead sets a default built-in table that generates a blank signal.

In the present embodiment, it is assumed that two display devices are connected to the computer system. However, as described above, a plurality of tables are used as common tables and a plurality of dedicated tables are used. Not limited to this, it is possible to initialize more display devices.

(Embodiment 6) FIG. 6 is a diagram showing an embodiment of a computer system according to the fifth aspect of the present invention. The computer system is an R containing the BIOS13.
It has a ROM socket 71 that makes the OM 11 detachable,
Also, a connector 7 for detachably attaching the display device 15.
2 In the present embodiment, the ROM socket 7
Although the connector 1 and the connector 72 are arranged independently, it is also possible to arrange them integrally. For example, it is conceivable that a signal line for controlling the display device 15 and an address bus and a data bus for reading and writing the contents of the ROM 11 are combined into one connector.
Further, by disposing the display device 15 and the ROM socket 71 separately as shown in FIG. 6, even if the display device 15 is damaged for some reason and is disconnected from the computer system, the ROM 11 is connected to the computer system. , Such as initialization of other hardware such as an external storage device, can be operated normally.

[0057]

As described above, according to the display device initializing method of the present invention, the initialization information for initializing the display device is held as a table in the nonvolatile memory, and the table is stored in the nonvolatile memory. The display device can be exchanged independently of the BIOS program, and the initialization procedure is constant regardless of the contents of the table.
There is an effect that a change in the BIOS design is not required even when replacing with an object of unknown specifications not taken into consideration at the time of designing the S.

According to the display device initialization method of the present invention, an update table of the initialization procedure can be read from the external storage device, and the display device can be initialized based on the information in the table. BIO
There is an effect that initialization information of a new display device whose specification does not exist at the time of S design can be incorporated.

According to the display device initialization method of the present invention, both the update table on the external storage device and the display device can be exchanged, so that the number of data to be incorporated in the BIOS is only one and the display device of various specifications. Can be initialized.

Further, according to the display device initializing method of the present invention, a part or all of the table can be shared and used when initializing a plurality of display devices, so that the plurality of display devices are initialized. In doing so, there is an effect that the BIOS size can be kept to a minimum.

A computer system using the display device initialization method of the present invention uses the display device B
There is an advantage that the system design is high and maintenance is easy because there is no need to change the design of the BIOS even when replacing the product with an unknown specification that has not been considered when designing the IOS.

A computer system using the display device initialization method of the present invention can be incorporated with new display device initialization information for which there is no specification at the time of BIOS design. It has an advantage that it can correspond to a display device.

The computer system using the display device initialization method of the present invention has the advantage that the display device and the update table can be exchanged, so that the display device can be replaced and used according to the application. Have.

Also, a computer system using the display device initialization method of the present invention can use a plurality of display devices and can minimize the BIOS size, so that a large amount of information can be obtained even in a small system. It has the advantage that it can be displayed.

[Brief description of the drawings]

FIG. 1 is a block diagram of a computer system showing a configuration of a first embodiment of the present invention.

FIG. 2 is a block diagram of a computer system showing a configuration of a second embodiment of the present invention.

FIG. 3 is a block diagram of a computer system showing a configuration of a third embodiment of the present invention.

FIG. 4 is a block diagram of a computer system showing a configuration of a fourth embodiment of the present invention.

FIG. 5 is a block diagram of a computer system showing a configuration of a fifth embodiment of the present invention.

FIG. 6 is a diagram of a computer system showing a configuration of a sixth embodiment of the present invention.

FIG. 7 is a block diagram of a computer system using a conventional display device initialization method.

[Explanation of symbols]

 Reference Signs List 11 ROM 12 RAM 13 BIOS 14 Start-up circuit 15 Display device 32 Display control circuit 33 Register set Register buffer Register transfer circuit 36 Display information table 41 EPROM 42 EPROM program circuit 43 EPROM program control circuit 44 Table header 45 Table ID 46 Table name 47 record Length 48 External storage device 49 Display device information 50 BIOS rewriting routine 51 Image memory 52 Address bus 53 Data bus 54 ROM 61 Secondary display device 62 Subtable 63 Subtable 64 Shared subtable 65 Display selection circuit 71 ROM socket 72 Connector

Claims (5)

[Claims] 1. Initializing means for initializing at least one display device, wherein the display device is initialized by a BIOS program, and
The S program holds initialization information for initializing the display device as a table in a nonvolatile memory,
The initialization method of a display device, wherein the table is exchangeable independently of the BIOS program, and an initialization procedure is constant regardless of the contents of the table. 2. The method for initializing a display device according to claim 1, wherein the initialization step reads an update table from an external storage device, compares the update table with the general update table, and if there is a difference in the comparison result. A method of initializing a display device, comprising replacing the contents of the table with the contents of the update table, and in subsequent initialization, initializing the display device based on the updated information of the table. 3. The method for initializing a display device according to claim 2, wherein said external storage device is exchangeable with said display device. 4. The method for initializing a display device according to claim 1, wherein the display device has at least two display devices, and a part or all of the table has at least two or more display devices. A method for initializing a display device, wherein the method is used commonly by the devices. 5. A computer system using the method for initializing a display device according to any one of claims 1 to 4.