JPH05113938A - Data collecting device - Google Patents

Abstract

PURPOSE:To ensure the universal applicability of a data collecting device which can collect only the specific information after tracing the bus of a data processor by enabling an external data processor to select and control the collected data. CONSTITUTION:A register 9 can write the bus address information on the data collected from an external data processor 15 into a data collecting device 8. Then a collation circuit 10 is added to collate the information written into the register 9 with an address bus 6 after tracing them together with a data transfer control circuit 11 which controls the transfer of data based on the collating result of the circuit 10, and a data transfer circuit 12 which transfers the data to the processor 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a data collection device,
In particular, it relates to the configuration of a device that traces the bus of a data processing device and collects data.

[0002]

2. Description of the Related Art A conventional data collecting apparatus collects all data on a bus 7 according to an instruction from the external data processing apparatus 15 and transfers the data to the external data processing apparatus 15 as shown in FIG. As shown in FIG. 3, there is a method of collating the fixed value 16 preset by the hardware with the address information on the bus 6 by the collating circuit 10 and collecting data to the external data processing device 15 based on the collation result.

[0003]

In the conventional data collecting apparatus, in the case of the method of collecting all data and transferring to the external data processing apparatus, it is necessary to extract only necessary data in the external data processing apparatus. Therefore, there is a problem that the processing in the external data processing device becomes complicated.
If the address information on the bus is collated with a preset fixed value and is transferred to the external data processing device based on the collation result, the fixed value for collating with the address information on the bus is changed. Therefore, there is a problem that it cannot collect versatility because it can collect only specific data.

An object of the present invention is to provide a data collecting device which enables data collection for a designated communication in the data processing device and has versatility by controlling selection of collected data from an external data processing device. Especially.

[0005]

The data collecting apparatus of the present invention is connected to a data processing apparatus composed of a central processing unit, a main storage unit, and a plurality of input / output units connected by a bus, and communicates on the bus. In a data collection device that collects data by tracing information and transfers it to an external data processing device, a register writable from the external data processing device and a collation circuit that collates address information on the bus with the contents of the register. And a transfer control circuit for controlling data transfer based on the collation result, and a data transfer circuit for transferring data to the external data processing device.

[0006]

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

FIG. 1 is a block diagram of an embodiment of the present invention.

The data processor comprises a central processing unit 1, a main memory unit 2, and input / output units 3-5, which are interconnected by an address bus 6 and a data bus 7. The data collection device 8 traces the data bus 7 and transfers the data to the external data processing device 15. The external data processing device 15 writes the address information in the bus communication traced to the register 9. The collation circuit 10 constantly traces the communication on the address bus 10 and sends a signal to the transfer control circuit 11 when the address information stored in the register 9 and the address information on the address bus 10 match. Upon receiving this signal, the transfer control circuit 11 controls the data transfer circuit 12 to transfer the data on the data bus 7 to the external data processing device 15.

[0009]

As described above, according to the present invention, by writing the address information of the data collected from the external data processing device in the register, it is possible to collect the data for the designated communication in the data processing device. Become. Further, the data to be collected can be changed by changing the data to be written in the register, which has the effect of making the data collecting device versatile. Furthermore, there is an effect that the processing in the external data processing device is simplified as compared with the conventional method in which all the data is collected and the necessary data is selected in the external data processing device.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is a block diagram of an example of a conventional technique.

FIG. 3 is a block diagram of another example of the prior art.

[Explanation of symbols]

1 Central Processing Unit 2 Main Memory Device 3-5 Input / Output Device 6 Address Bus 7 Data Bus 8 Data Collection Device 9 Register 10 Matching Circuit 11 Transfer Control Circuit 12 Data Transfer Circuit 13 Control Signal (Register Write Information and Transfer Control Information) 14 Transfer data 15 External data processor 16 Fixed value information

Claims (1)

[Claims] 1. A data processing apparatus comprising a central processing unit, a main storage unit, and a plurality of input / output units connected by a bus, and collecting data by tracing communication information on the bus, In a data collection device that transfers data to an external data processing device, a register writable from the external data processing device, a matching circuit that matches address information on the bus with the contents of the register, and data transfer control based on the matching result And a data transfer circuit for transferring data to an external data processing device.