JPH0296211A - Board attachment system - Google Patents

Abstract

PURPOSE:To attach a board without stopping the working of a bus by latching previously the necessary data to a board to be newly attached when a new board is added to bus of a high-degree computer system having a reset period data latch type bus or when a faulty board is replaced. CONSTITUTION:A board 1 to be attached to a reset period data latch type bus is put into an adaptor 20, and an ID changeover switch 21 is switched to set the stroke number of a back rack 40 to which the board 10 is attached. Thus a card throttle ID number is acquired by a card throttle ID number generating circuit 23 in response to the corresponding throttle number. At the same time, the corresponding arbitration ID data is obtained by an arbitration ID data generating circuit 24. Then a latch pulse is obtained by a latch pulse generating circuit 25 with push of a set button 22, and the ID data is latched by an ID data latch circuit 3 via a bus connector 26 of the adaptor 20 and a bus connector 2 of the board 10.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a board for use in a combi coater system,
For example, it relates to mounting methods for digital output boards, communication boards, etc.

[Conventional technology]

The bus of the computer system is working! In the past, as a method of attaching a board to a bus,
There is a method disclosed in Publication No. 2-8211. In this method, when installing a board on a bus, the board is connected to the bus while power is being supplied to the boat from the outside, and after the board is installed, the external power supply is cut off.

According to this method, when a boat is attached to a lotus, power is supplied to the board from both the external '1S source and the power via the lotus until the boat's external power is cut off. It is possible to prevent unnecessary No. 13 from being sent to the lotus inside.

[Problem to be solved by the invention]

By the way, recently there have been advanced developments such as the IEEE (Institute of Electrical and Electronics Engineers of America) 1296 HAS standard, where computers are able to reliably understand the correspondence between boards and the throttle that connects them, and incorporate this into the computer's functions. New computer systems have been developed and are beginning to be put into practical use. In such a computer system, card slot 1D data and arbitration ID data are assigned to each board at the beginning of the system. Boards connected to the bus then latch these ID data during the system entry period. In such a computer system, by giving card throttle 10 data and arbitration ID data to each board, 1EEE12
Based on the V.96 bus standard, various data transfers are performed, such as the transfer of instructions and data from memory to the CPU, and interrupt and memory transfers from one CPU to another.

Thus, in advanced combinator systems having a bus (hereinafter referred to as a reset period data latch type bus) that requires the boards connected to the bus to latch certain data during the system startup period. However, there may be times when a failed board must be replaced or a new board must be added to the system. In such a case, by attaching the boat to the lotus using the method disclosed in the above-mentioned publication, it is possible to connect the board without sending unnecessary signals to the operating bus. However, in the conventional system, the card throttle ID data and arbitration ID data are not assigned to the newly installed board, so data transfer cannot be performed as is based on the IEE81296 bus standard. Therefore, in conventional schemes, it is necessary to reset the system in order to assign these ID data to the newly installed board. Thus, when a new board is installed on the bus of an advanced computer system such as the one described above, the traditional board installation method requires that the bus assembly be stopped, and all other boards connected to the same bus must be stopped. There was a problem in that the functions of other boards in operation stopped.

The present invention has been made based on the above circumstances, and provides a board mounting method that allows a new board to be mounted on a reset period data latch type bus during operation without resetting and stopping the system. The purpose is to

[Means for Solving the Problems] To achieve the above object, the present invention is directed to a computer system that requires a board connected to a bus to latch predetermined data during a reset period. In the board mounting method, when mounting the board on the lotus, the data required after the board is mounted is stored in the board in advance, and the board is connected to the bus with power supplied to the board from the outside. After installation, the power supply from the outside is cut off.

[Effect]

The present invention uses the above-mentioned means to mount the board on the bus while power is supplied to the board from the outside, and then cuts off the power from the outside after the mount, so that the board can be mounted without generating unnecessary signals. Can be connected to the bus.

In addition, before installing the board, the board is pre-stored with data that will be required after the board is installed, such as card throttle ID data and arbitration ID data. For example, based on the IEEE1296 HAS standard, various data transfer cycles are immediately executed.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

FIG. 2 is a schematic diagram of a board connected to the bus, where 10 is a board, 1 is a power connector, and 2 is a bus connector. This board 10 is provided with a latch circuit 3 for ID data, and the latch circuit 3 is connected to an I
D data and latch pulses are supplied.

FIG. 3 is a schematic perspective view of the adapter with the board inserted. In FIG. 3, 2o is an adapter for writing ID data to the board 10, 21 is an ID setting changeover switch for selecting necessary ID data from various ID data, and 22 is an ID selected by the ID setting changeover switch 21. 3° is an external power supply for writing data to the board. As shown in FIG. 3, when a board 10 to be newly connected to the bus is attached to the adapter 20, the bus connector (not shown) of the adapter 20 and the bus connector 2 of the board 10 are connected. Then, then, I
The D setting changeover switch 21 selects ID data corresponding to a throttle number attached to a bus rack to be installed, for example, an IEEE1296 bus, which will be described later. Next, the set button 22 is pressed to write the selected ID data to the board IO. In this way, board 10
Before installing the card to the board 10, necessary card throttle ID data and arbitration 10 data are written in advance into the latch circuit 3 of the board 10 using the adapter 20.

FIG. 4 is a schematic perspective view of the bus rank, where 40 is a bus rack, 41 is a pass line connection connector, and 50 is another board in operation. The board 10, in which the necessary ID data has been stored in advance by the adapter 20, is connected to the external power supply section 3.
0 is connected to the throttle of the bus rack 40.

FIG. 1 is a schematic functional block diagram of an adapter that writes ID data to a board. The operation of this embodiment will be described below with reference to FIG. 1 as well.

First, for the reset period data latch type bus, insert the newly installed board IO into the adapter 20 shown in FIG. 3, and then! Switch the D changeover switch 21,
The throttle number of the bank rank 40 to which the board 10 is to be installed is set. Then, card throttle ID
The generation circuit 23 obtains card throttle 10 data corresponding to the throttle number, and the arbitration ID generation circuit 24 obtains corresponding arbitration ID data.

Next, when the set button 22 is pressed, a latch pulse is obtained by the latch pulse generation circuit 25, and this latch pulse is transmitted to the latch circuit 3 of the board IO via the bus connector 26 of the adapter 20 and the bus connector 2 of the board 10. As a result, the ID data is sent to the latch circuit 3 of the board IO and latched.

The board 10 with the ID data latched in this way is connected to the adapter 2 while the external power supply unit 30 is still connected.
Pull from 0. Even if the board 10 is pulled out from the adapter 20, the external power supply unit 30 is connected, so the ID data latched in the latch circuit 3 is retained, and the buffer circuit connected to the pass line of the Haslack 40 to be inserted is retained. Since power is supplied to the lotus, the signal to the lotus becomes a high impedance state, and the lotus interface circuit theory is established.

Next, while keeping the external power supply unit 30 connected to the board 10, the board 10 is inserted into the corresponding throttle of the bus rack 40, as shown in FIG. Thereby, the bus connector 2 of the board 10 and the pass line connection connector 41 of the bus rank 40 are connected. At this time, since the bus interface circuit theory has been established as described above, it is possible to prevent erroneous signals from being sent to the path line due to unstable operation of the bus interface circuit. lastly,
After waiting until power is stably supplied to the board 10 via the bus, the connection wire of the external power supply section 30 is removed from the power connector 1 of the board 10.

As a result, since the card throttle ID data and arbitration ID data are already latched in the board 10, the operation of the internal circuit of the board 10 based on the IEEE1296 bus standard is immediately started.

In the above embodiment, the case where the bus of the computer system is an IEEE I296 bus has been described, but any other bus may be used as long as it is a reset period data latch type bus.

〔Effect of the invention〕

As described above, according to the present invention, when a new board is added to a high-level computer system having a data latch type reset period, or when a failed board is replaced with a normal port, , the necessary data is latched onto the newly installed board and then connected to the bus, providing a board installation method that allows new boards to be installed on the lotus without having to reset and stop the running lotus. can do.

[Brief explanation of drawings]

Figure 1 is a schematic functional block diagram of the adapter that writes ID data to the board, Figure 2 is a schematic diagram of the board connected to the bus, Figure 3 is a schematic perspective view of the adapter with the board inserted, and Figure 4 is It is a schematic perspective view of a bus rack. l...Power connector, 2...Bus connector, 3
... ID data latch circuit, 10... board, 20... adapter, 21...
ID setting changeover switch, 22...Set button, 30...External power supply section, 40
... IEEE1296 bus connection, 41...pass line connection connector.

Claims (1)

[Claims] In a method of attaching a board to a bus of a computer system in which the board connected to the bus needs to latch predetermined data during a reset period, when the board is attached to the bus, after the board is attached. A board mounting method in which necessary data is stored in the board in advance, the board is mounted on the bus with power supplied from the outside, and after mounting, the supply of power from the outside is cut off.