JPH04314233A - high speed data communication equipment - Google Patents

Abstract

PURPOSE:To attain high speed data transfer without need of copy processing of a data between a main storage device and a data communication equipment. CONSTITUTION:Part of a main storage device 4 for a main storage device of a communication or other equipment making data communication is featured to be mounted in a data communication equipment 3a and the data communication equipment is directly connected to a CPU bus 5 to realize high speed data transfer. Thus, the time required for data transfer is reduced and high speed data communication is easily implemented.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data communication device installed in a computer or other device that performs data communication, and particularly to speeding up data communication.

0002

2. Description of the Related Art FIG. 3 is a block diagram schematically showing the configuration of a communication system that performs data communication using a conventional data communication device. In the figure, 1 is the central processing unit (CPU
), 2 is the main storage device, 3 is the data communication device, 5 is the CPU
The bus 6 is a data input/output bus (I/O bus). As shown in FIG. 3, the data communication device 3 is connected to a CPU bus 5 or a data input/output bus 6, and a CPU 1 and a main storage device 2 are connected to the CPU bus 5, respectively.

FIG. 4 is a flowchart for explaining data transmission and data reception processing by the data communication device of FIG. In the figure, 21 to 25 are steps showing the data processing process.

Next, the operations of data transmission and data reception by the conventional data communication device will be explained. First, when transmitting data, a data transmitting command is issued from the CPU 1 (step 21). Along with this, the transmission data (transfer data) on the main storage device 2 is copied to the data communication device 3 (step 22
). The data communication device 3 outputs the transmission data only after this copying process is completed (step 23).
).

Similarly, when data is to be received, when an interrupt notifying data reception occurs from the data communication device 3, a data reception command is issued from the CPU 1 (step 24). Along with this, the received data is copied from the data communication device 3 to the main storage device 2 (step 25). This allows the CPU 1 to obtain the received data for the first time.

[0006]

[Problems to be Solved by the Invention] Since the communication system that performs data communication using the above-mentioned conventional data communication device is configured as described above, in the case of data transmission and data reception, the main storage device 2 and A process of copying data between the data communication device 3 and the data communication device 3 is always required, which causes a problem in that data transfer becomes slow when performing data communication.

[0007] The present invention was made to solve the above-mentioned problems, and it is possible to perform high-speed data transfer without the need for data copy processing between the main storage device and the data communication device. The purpose is to provide a high-speed data communication device that can perform

[0008]

[Means for Solving the Problems] A high-speed data communication device according to the present invention includes a part of the main storage device of a computer or other device that performs data communication implemented in the data communication device; data communication equipment
It is designed to be directly connected to the PU bus.

[0009]

[Operation] Since the high-speed data communication device of the present invention does not require processing to copy data between the main storage device and the data communication device, the time required for data transfer is shortened. Furthermore, since the data communication device is directly connected to a high-speed CPU bus, the CPU can access transferred data at high speed.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram schematically showing the configuration of a communication system that performs data communication using a high-speed data communication device according to an embodiment of the present invention. In the figure, 1 is a central processing unit (CPU), 2 is a main storage device, 3a is a data communication device according to the present invention, 4 is a part of the main storage device in the main storage device 2 installed in the data communication device 3a, 5 is CP
It's a U bus. As shown in FIG. 1, the data communication device 3a according to the present invention includes a part of the main storage device 4 within the device.
This part of the main memory 4 is configured as a part of the main memory 2 connected to the CPU bus 5. Further, the data communication device 3a is also directly connected to the CPU bus 5 to which the CPU 1 and the main storage device 2 are connected.

FIG. 2 is a flowchart for explaining data transmission and data reception processing by the high-speed data communication device of FIG. In the figure, 11 to 14 are steps showing the data processing process.

Next, the data transmission and data reception operations performed by the high-speed data communication apparatus according to the embodiment of the present invention will be explained. First, when transmitting data, C
A data transmission command is issued from PU1 (step 11
). At this time, the transmission data (
transfer data). The data communication device 3a that has received the transmission data (transfer data) stores the data in a part of the main storage device 4 on the data communication device 3a without acquiring the data from the main storage device 2 via the CPU bus 5. Output the data as is (step 12).

Similarly, when data is received, when an interrupt notifying data reception occurs from the data communication device 3a, a data reception command is issued from the CPU 1 (step 13). At this time, the data communication device 3a stores the received data in a part of the main storage device 4 on the device. Further, the CPU 1 directly accesses the received data stored in a part of the main storage device 4 on the data communication device 3a (step 14).

In the above embodiment, the data communication device 3a that is installed in a computer or other device that performs data communication has been described, but the data communication device 3a is not limited to such a data communication device, and can be used, for example, with an external storage device, a graphic processing device, The present invention can also be applied to other input/output devices such as printers, and produces the same effects as the above embodiments.

[0015]

As described above, according to the high-speed data communication device of the present invention, a part of the main storage device of a computer or other device that performs data communication is implemented within the data communication device, Furthermore, since this data communication device is configured to be directly connected to the CPU bus, compared to conventional devices of this type, there is no need for processing to copy data between the main storage device and the data communication device. This has an excellent effect in that the time required for data transfer is shortened and high-speed data communication can be easily performed.

[Brief explanation of drawings]

FIG. 1 is a block diagram schematically showing the configuration of a communication system that performs data communication using a high-speed data communication device that is an embodiment of the present invention.

FIG. 2 is a flowchart for explaining data transmission and data reception processing by the high-speed data communication device in FIG. 1;

FIG. 3 is a block diagram schematically showing the configuration of a communication system that performs data communication using a conventional data communication device.

FIG. 4 is a flowchart for explaining data transmission and data reception processing by the data communication device of FIG. 3;

[Explanation of symbols]

1 Central processing unit (CPU) 2 Main memory 3. Data communication equipment 3a Data communication device 4 Some main memory devices 5 CPU bus

Claims (1)

[Claims] Claim 1: In a data communication device installed in a computer or other device that performs data communication, a CPU to which a central processing unit (CPU) and a main storage device are connected.
A high-speed data communication device, characterized in that it is also directly connected to a bus and has a configuration in which a part of the main memory device is mounted within the device itself.