JPH0877091A - Setting system for extended equipment channel - Google Patents

Abstract

PURPOSE: To provide the setting system for extended equipment channel which facilitates the confirmation of a free channel and can standardize a channel setting method. CONSTITUTION: A channel setting circuit consisting of two channel setting switches 2 and 3, a decoder 4, and four tri-state buffers 5-8 is provided not on the side of an extension board 131, but on the side of an extension slot 1, so the switches are arranged together at one place. Therefore, a free channel is easily found. Further, the allocation of channels can be managed on the side of an information processor, so the channel setting method can be standardized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extension device channel setting system, and more particularly to a channel setting system assigned to an extension device of an information processing apparatus.

[0002]

2. Description of the Related Art Conventionally, when an extension device is added, the channel of the extension device to be added is assigned by a channel setting switch provided in the extension device after grasping the channels already used.

Generally, this channel setting switch is provided on the expansion board of the expansion device.

4 and 5 are circuit diagrams of an example of a conventional extended equipment channel setting circuit, and FIGS. 6 and 7 are diagrams showing a channel setting method of the extended equipment channel setting circuit.
In addition, the same numbers are given to the same components and the description thereof is omitted.

FIG. 4 shows four expansion slots in the information processing device.
A case where the number of channels is provided, that is, a case where four channels are provided is shown.

The channel setting switches 101 and 102 are provided on the extension board 103. The channel setting switches 101 and 102 are connected to the input side of the decoder 104, and the output side of the decoder 104 is connected to the control terminals of the four 3-state buffers 105 to 108. further,
Output sides of the 3-state buffers 105 to 108 are connected to the expansion bus line 110 in the expansion slot 109.

Then, the channel setting switches 101, 1
02 and the outputs (selected channels) of the 3-state buffers 105 to 108 are as shown in FIG. The channel setting switches 101 and 102 are set to "1" when they are on the + 5V side and "0" when they are on the ground side. However, + 5V
It may be set to "0" for the side and "1" for the ground side.

FIG. 5 shows three expansion slots in the information processing device.
A case where the number of channels is provided, that is, a case where three channels are provided is shown.

The channel setting switches 111 and 112 are provided on the extension board 113. The channel setting switches 111 and 112 are connected to the input side of the decoder 114, and the output side of the decoder 114 is connected to the control terminals of the three 3-state buffers 115 to 117. further,
The output sides of the three-state buffers 115 to 117 are connected to the expansion bus line 110 in the expansion slot 118.

Then, the channel setting switches 111, 1
The relationship between 12 and the outputs (selected channels) of the 3-state buffers 115 to 117 is as shown in FIG.

As described above, the channel setting switch is provided on the expansion board side, and the channel setting method is different for each expansion board.

[0012]

The conventional expansion board is
Since the channel setting switch is provided on each expansion board, if you try to add an expansion board, you must check all expansion boards to avoid conflict with the channels used by other expansion boards. There was a problem. Further, since the channel setting method is different for each expansion board, there is a problem that the setting method must be confirmed for each expansion board. The same was true when the channel setting switch was provided on the main body of the expansion device.

Therefore, an object of the present invention is to provide an extended device channel setting system in which it is possible to easily confirm an empty channel and to unify the channel setting method.

[0014]

In order to solve the above-mentioned problems, the present invention is characterized in that a channel setting means for setting a channel used in an expansion device is provided on the information processing apparatus side.

[0015]

By providing the channel setting means on the side of the information processing apparatus, the channel setting switches of all expansion devices can be integrated in one place, and the channel allocation can be managed on the side of the information processing apparatus.

[0016]

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

FIG. 1 is a circuit diagram of an example of a first extended device channel setting circuit according to the present invention, FIG. 2 is a circuit diagram of an example of the second extended device channel setting circuit, and FIG. 3 is a diagram of the same extended device channel setting circuit. It is a figure which shows the channel setting method of a circuit.

The first expansion device channel setting circuit is composed of an expansion slot 1 for inputting an interrupt signal output from the expansion board 131 of the expansion device and a data signal (not shown).

In this embodiment, a case where four expansion slots, that is, four channels are provided in the information processing apparatus, and two expansion boards are mounted will be described.
The number of expansion slots is not limited to four and can be set to any number.

The channel setting switches 2 and 3 are provided on the expansion slot 1 in the information processing apparatus, and the channel setting switches 2 and 3 are connected to the input side of the decoder 4 and the output side of the decoder 4 has four 3's. State buffer 5
8 to 8 and the output sides of the 3-state buffers 5 to 8 are connected to the expansion bus line 110 in the expansion slot 1. The interrupt signal line L1 from the expansion board 131 is connected to the input side of the 3-state buffers 5 to 8, and the data signal line (not shown) is connected to the expansion bus line 110 in the expansion slot 1.

Then, the channel setting switches 2 and 3
The combination of the signals of "0" or "1" generated in 1 is input to the decoder 4, and the decoder 4 outputs channels 1 to 1
It is converted into a signal that causes (selects) any one of the four to be "1" (or may be "0"). The decoder 4 is a known selection circuit including, for example, a NAND gate and an inverter. And 3 from this selected channel
An interrupt signal is sent to the extension bus line 110 via the state buffer.

Similarly, the second expansion device channel setting device inputs the interrupt signal output from the expansion board 132 of the expansion device and the data signal (not shown) to the expansion slot 1
It is composed of 1.

The channel setting switches 12 and 13 are provided on the expansion slot 11 in the information processing apparatus, and
The channel setting switches 12 and 13 are connected to the input side of the decoder 14, and the output side of the decoder 14 is connected to the control terminals of the four 3-state buffers 15 to 18, and further 3
The output side of the state buffers 15 to 18 is the expansion slot 1
In the first example, the expansion bus line 110 is connected. The interrupt signal line L2 from the expansion board 132 is connected to the input side of the 3-state buffers 15 to 18, and the data signal line (not shown) is the expansion bus line 110 in the expansion slot 11.
Connected to

Since the operation is similar to that of the first extended device channel setting device, its explanation is omitted.

The channel setting switches 2, 3, 1
2, 13 and 3-state buffers 5-8, 15-1
The relationship with the output of 8 (selected channel) is as shown in FIG.

That is, the channel setting switches 2, 3,
Since the switches 12 and 13 are provided on the side of the expansion slots 1 and 11, these switches 2, 3, 12 and 13 can be integrated in one place. Further, channel allocation can be managed on the information processing apparatus side.

[0027]

Since the channel setting means is provided on the information processing device side, the channel setting switches can be provided at one place. Therefore, it is possible to easily find a vacant channel, and it is possible to save the labor of removing the existing expansion board and checking the used channel as in the conventional case. Also, since the channel allocation can be managed on the side of the information processing device, the channel setting method can be unified. Therefore, the time required for channel setting can be shortened.

[Brief description of drawings]

FIG. 1 is a circuit diagram of an example of a first extended device channel setting circuit according to the present invention.

FIG. 2 is a circuit diagram of an example of a second extended device channel setting circuit.

FIG. 3 is a diagram showing a channel setting method of the extension device channel setting circuit.

FIG. 4 is a circuit diagram of an example of a conventional extended device channel setting circuit.

FIG. 5 is a circuit diagram of an example of the extended device channel setting circuit.

FIG. 6 is a diagram showing a channel setting method of the extension device channel setting circuit.

FIG. 7 is a diagram showing a channel setting method of the extension device channel setting circuit.

[Explanation of symbols]

 1,11 Expansion slot 2,3,12,13 Channel setting switch 4,14 Decoder 5-8,15-18 3 state buffer 131,132 Expansion board

Claims (3)

[Claims] 1. An extension device channel setting system, characterized in that channel setting means for setting a channel used by the extension device is provided on the information processing device side. 2. The expansion device channel setting system according to claim 1, wherein the channel setting means is provided on an expansion slot side to which an expansion board is connected. 3. The channel setting means comprises a channel setting switch and a selection circuit for outputting a signal from an expansion board to a predetermined channel according to the setting of the switch. Expansion board channel setting system described in 2.