JP3227568B2 - Automatic control circuit for plug and play system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a computer system, and more particularly to an automatic control circuit of a plug and play system for efficiently performing a plug and play (PnP) operation of a system using an ISA card.

[0002]

2. Description of the Related Art A conventional ISA plug & play card will be described below with reference to the accompanying drawings. FIG.
1 is a configuration diagram showing the concept of a conventional plug and play system. The plug and play control circuit allows the environment to be automatically set when the peripheral device is used when the system BIOS or the operating system of the main system supports the plug and play mode. The plug and play support device is provided with some specific resources (I
RQ, DMA, etc.).
This is to allow the resource manager (BIOS, O / S, etc.) to take measures to prevent collision with the resources of other different Plug & Play supporting devices, Extra resources are stored in hardware itself. In other words, the plug & play device has EE in the hardware.
It has a storage medium such as a PROM.

[0003] The configuration of a conventional plug and play control circuit of an ISA card will be described below. First, IS
A nonvolatile memory unit 1 such as a ROM or an EEPROM storing data for setting the configuration of the A card;
System BIOS and operating system (O /
S) to output plug and play configuration data and IS
Plug & Play block 2 for specifying A card configuration
And a configuration MUX block for determining whether to use any one of the jumperless configuration data or the plug-and-play configuration data of the nonvolatile memory unit 1 as actual configuration data according to a plug-and-play mode selection signal of the end user And 3.

The prior art IS constructed as described above
A card plug & play control circuit is ISA plug &
The end user decides whether to configure the play card by using the jumperless configuration data stored in the nonvolatile memory unit 1 or by using the plug and play configuration data of the plug and play block 2. It will be set as a jumper. This means that the end user
You must know beforehand whether the system is in plug and play mode.

[0005]

Prior art ISA card plug and play control circuits require the end user to know in advance whether or not the system supports the plug and play mode. Operation efficiency of the system is reduced. An object of the present invention is to solve the above-mentioned problem of the ISA card plug-and-play control circuit of the prior art. An object of the present invention is to provide an automatic control circuit of a plug-and-play system that can be efficiently performed.

[0006]

SUMMARY OF THE INVENTION An automatic control circuit of a plug and play system according to the present invention, in which a plug and play operation is efficiently performed without a mode selection signal from an end user, stores jumperless configuration data of the system. A nonvolatile memory unit for storing and outputting, and a plug and play configuration block for storing and outputting plug and play configuration data;
An initialization key block which is written from a system BIOS or an operating system supporting the plug and play mode and outputs a signal when the writing is suitable; and the nonvolatile memory unit based on an output signal of the initialization key block And a configuration MUX block for determining whether to use either the jumperless configuration data or the plug-and-play configuration data in the plug-and-play configuration block as actual configuration data.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an automatic control circuit of a plug and play system according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. FIG. 2 shows a plug &
FIG. 3 is a configuration diagram of an automatic control circuit of the play system, and FIG.
7A and 7B are a detailed configuration diagram of an initialization key block and a table showing initialization key procedure values according to the present embodiment. The automatic control circuit of the plug-and-play system of the present embodiment automatically searches whether the system supports the plug-and-play mode and outputs an initialization key block 24 for outputting a mode designation signal to the plug-and-play block 21. The plug-and-play operation is performed efficiently, and its detailed configuration is as follows. First,
A nonvolatile memory unit 20 such as a ROM or an EEPROM that stores data for setting the configuration of the ISA card as in the conventional case is provided. Further, the present embodiment includes a plug-and-play block 21 having a plug-and-play configuration block 23 for storing and outputting plug-and-play configuration data and an initialization key block 24. The initialization key block 24 detects whether the system BIOS or the operating system supports the plug & play mode, and outputs a mode designation signal corresponding to the detection result as an output signal. Further, in the present embodiment, the jumperless configuration data of the nonvolatile memory unit 20 is connected to the nonvolatile memory unit 20 and the plug & play block 21 by the mode designation signal of the initialization key block 24. Configuration MUX that determines which configuration data to use as the actual configuration data
A block 22 is provided.

The above-mentioned initialization key block 24 can be initialized by a system BIOS or an operating system that supports the plug & play mode, but cannot be initialized by others. Therefore, when the output signal output from the initialization key block 24 is used as the mode designation signal, whether the jumperless configuration data is used as actual configuration data or the plug-and-play configuration data is used as actual configuration data is ended. The determination can be made without the user's selection.

FIG. 3A shows the detailed configuration of the initialization key block 24. As is well known, to detect whether a card inserted into an ISA slot has a plug-and-play function, an initialization key block value is shifted and output by 32 write commands (IOWR) to an address port. , A plurality of D-flip-flops are connected in series. Only system BIOS and operating systems that support plug and play mode can fill in the address port. FIG. 3B is a table showing the procedure values of the initialization key that are currently generally performed. For example, if the initial value of the initialization key block 24 is 6A and the value written in the address port is 6A,
The value of the initialization key block 24 is shifted to B5. In this way, when the data is written to the address port correctly in the order shown in FIG. On the other hand, if the data is not correctly written, the value always returns to the initial value 6A. The present invention makes use of this, and when 37 is input to the address port and it changes to 39, when 39 is input to the address port, the plug & play mode signal of FIG. 2 becomes active. That is, an output signal is output from the initialization key block 24. Thereby, the configuration MUX2
2 selects plug and play configuration data from the plug and play configuration block 23. Otherwise, the jumperless configuration data of the nonvolatile memory 20 is selected.

When the 32-byte initialization key value is written in the address port in a correct procedure in this manner, this means that the system BIOS or the operating system supports plug and play. therefore,
When the end user inserts and operates the ISA card into the system in the manner described above, it is possible to determine whether the system supports plug and play. The configuration MUX block 22 is caused to select one of them based on the result. Therefore, when the end user inserts and operates the ISA card into the system, one of the plug-and-play configuration data and the jumperless configuration data can be automatically used as the actual configuration data.

[0011]

The automatic control circuit of the plug and play system of the present invention utilizes an initialization key block that can be initialized only by the system BIOS and the operating system that support the plug and play mode. Since the output value of the initialization key block output in accordance with the writing operation from is used as the mode designation signal, the mode is automatically set even if the end user does not know in advance whether the system supports the plug & play mode. Is specified, the plug-and-play operation is more efficiently performed when an ISA card is used.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing the concept of a conventional plug and play system.

FIG. 2 is a configuration diagram of an automatic control circuit of the plug and play system of the present invention.

FIGS. 3A and 3B are a detailed configuration diagram of an initialization key block according to the present invention and a table showing order values of initialization keys;

[Explanation of symbols]

 Reference Signs List 20 nonvolatile memory section 21 plug & play block 22 configuration MUX block 23 plug & play configuration block 24 initialization key block

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G06F 13/00-13/14

Claims (3)

(57) [Claims] 1. A non-volatile memory unit for storing and outputting jumperless configuration data of a system, and a plug and storage unit for storing and outputting plug and play configuration data.
A play configuration block, an initialization key block written by a system BIOS or an operating system that supports the plug & play mode, and an output signal output when correctly written, based on an output signal of the initialization key block. , Jumperless configuration data or plug &
Configuration M for determining whether to use plug and play configuration data in the play configuration block as actual configuration data
Possess a UX blocks, the said plug by an output signal of said initialization key block
& Play mode is automatically specified.
Check if the system supports the Plug & Play mode.
Use ISA card even if user does not know in advance
An automatic control circuit for a plug-and-play system, characterized in that a plug-and- play operation is performed more efficiently when the operation is performed . 2. The non-volatile memory section is a ROM or an EEPROM.
2. The automatic control circuit for a plug and play system according to claim 1, wherein the automatic control circuit comprises an OM or the like. 3. The plug according to claim 1, wherein the initialization key block comprises a plurality of D-flip-flops for shifting and outputting a value according to an address port entry command from a system BIOS or an operating system. & Play system automatic control circuit.