JPS593542A - Data transferring system - Google Patents

Abstract

PURPOSE:To raise remarkably the operation efficiency of a system, by transmitting a dummy signal of quantity corresponding to the processing capacity of plural input/output devices. CONSTITUTION:By an operation control of a microprocessing device MPU, first of all, the processing capacity is inquires to each device, and its response is stored in a register R-A. Subsequently, the device MPU sets an instruction to be sent to a high speed input/output device I/O1, to a data setting register R-B, and sets a corresponding dummy quantity ''1'' to a counter CNT. In this case, a countact of a switching circuit SW is set to the side (a) and the instruction is sent to a transmission line TL. Subsequently, the contact is set to (b), and a dummy signal stored in a high speed I/O device dummy register R/D is sent out to a transmission line TL. Also, in case when the device I/O is for medium and low speed use, a counting value of the corresponding counter CNT is set from the register R-A, so that a data is sent, following a dummy quantity of ''5'', for instance, of 5 times of that in case of a high speed ''1''.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to a data transfer system that controls a plurality of input/output devices with different processing capabilities so that they can fully utilize their original processing capabilities.

(2) Prior Art and Problems When data is transferred at a relatively high speed, a command and a dummy are added to the beginning of the data as shown in FIG.

Preparation K for multiple input/output devices l101 e l102* to receive data DT after receiving command CMD
Since the time for id (rise time) differs for each input/output device (an example of a different processing capacity), a dummy amount DM1. DM2. ... is added and sent to other high-speed devices and medium-speed devices as well. Therefore, even if an input/output device capable of high-speed processing is used, the transfer ability and processing ability will deteriorate in some areas.

OTL is a control device.

(3) Purpose of the Invention The purpose of the present invention is to improve the above-mentioned drawbacks and to provide a data transfer method that fully utilizes processing ability by transferring data with different amounts of dummy for each input/output device. It is in.

(4) Structure of the Invention The structure of the present invention to achieve the above-mentioned object is to provide a command at the beginning of a data format, insert dummy information between predetermined data, and connect multiple input/output devices with different processing capabilities. In a data transfer method for an information processing system that has a control device that controls data transfer to a computer, if the transfer format is formed of three types: command, dummy, and data, the amount of dummy corresponds to the processing capacity of the input/output device. It is to set children.

(5) Embodiment of the Invention FIG. 2 is a diagram showing in detail the configuration of the control section shown in FIG. 1 as an embodiment of the invention. When it is known that the processing capabilities of input/output devices in the system are different, the microprocessor MPU first adjusts the processing capabilities of each device by controlling the operation, and the response is stored in a register R that stores the status of each device. − Store in . microprocessor mp
U sets a command to be sent to the high-speed input/output device l101 in the data set register R-BK, and then sets "1" to the counter ONT K as a corresponding dummy lid. Set the contact of the switching circuit @SW to the a side and send the above command to the transmission line.

Next, the high-speed input/output device dummy register R-
DK sends out the dummy signal stored in advance to the transmission line TL. From the counter GNTK, the contact point is the dummy number “1”.
” to switch to contact a. After sending the command, the microprocessor MPU reads out the memory MEM and stores predetermined data in the register R-B, so that the data DT is sequentially transmitted via the contact a.

When the input/output device 10 is for medium speed/low continuous use, the corresponding count value of the counter CNT is set from the register RA. For example, when the count value is set to "5", the contact of the switching circuit SW is set to the b side for a time that is five times the time described above.

Therefore, the dummy amount "5" following the command is transmitted successively, and then data is transmitted.

(6) Effects of the Invention In this way, according to the present invention, dummy signals are transmitted in an amount corresponding to the processing capacity of multiple input/output devices, so if the device is capable of high-speed processing, data can also be transmitted in this manner. Also, if it is a low-speed processing device, the data will be processed slowly (
As a result, the operating efficiency of the system can be maximized.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a conventional data transfer system, and FIG. 2 is a diagram showing the configuration of an embodiment of the present invention. OTL...control device Ilo 1, I
lo 2...Input/output device MIEM...Memo IJ
MPU...Microcomputer R-A
, R-B, R-D...Register CNT...Counter SW...Switching circuit Patent applicant Fujitsu Ltd. Agent Eisuke Tsuchi Suzuki Figure 1

Claims (1)

[Claims] In a data transfer method for an information processing system that includes a control device that provides a command at the beginning of a data format, inserts dummy information between it and predetermined data, and controls data transfer to multiple input/output devices with different processing capabilities, A data transfer method characterized in that when a transfer format is formed of five types of commands, dummy data, and data, an amount corresponding to the processing capacity of an input/output device is set as the amount of dummy.