JPS626317A - State transition synchronizing system - Google Patents

Abstract

PURPOSE:To attain the accurate processing execution by informing the change of an external state to an internal process together with the input order of data. CONSTITUTION:A state transition synchronizing system consists of an FIFO buffer storage mechanism 1001, a coding mechanism 1002 which detects and codes the change of an external state connected to an entrance part, a reading mechanism 1004 which merges the input data and the state coding data and extracts them out of the mechanism 1001 and at the same time detects and allocates the state coding data and a state information storage mechanism 1005. Thus, the information showing the change of the external state is put into the mechanism 1001 to store the position of the data supplied successively where the external state changes in the corresponding order. Thus, the state change is detected at the entrance part of the mechanism 1001 and the coded state information is detected at the exit part of the mechanism 1001 respectively. This secures the accurate execution of processing with the state transition synchronizing system.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a state transition synchronization method, and more particularly to a state transition synchronization method in a data input mechanism in a data processing system.

[Conventional technology]

The data processing system performs data input processing via a first-in first-out buffer storage mechanism because the speed of the operator's key touch and the speed of the basic data from the line are instantaneously faster than the internal processing of input data. is common.

In addition to actually inputting data, this data input process has additional functions that allow inspection and correction of input data and the use of some previously input data. Processing is changed using a switch on the keyboard.

[Problem that the invention seeks to solve]

In the conventional data processing system described above, when switching with a switch on the keyboard and actually inputting data are performed in succession at high speed, the switch is switched while data remains in the first-in, first-out buffer storage mechanism. I am going to be
There was a drawback that errors occurred in the internal processing of data.

For example, referring to the specific example of the data shown in FIGS. 3 and 4, this data has the same content in the first item from the first code to the fourth record. Therefore, when entering this data, the first code is entered for all items, but it is possible to omit the data entry for the first item for the second to fourth records. In order to make it possible to omit data entry for this first item, the first item is
It is assumed that the attribute is given as an item that can be loaded with immediately preceding data. Referring to the operating procedure for inputting data shown in Figure 3 and the time chart shown in Figure 4, after inputting data A of the first item of the first code, the operator turns on the previous data import switch. (on). This results in
For the second to fourth records, only data B to E of the second item is input. Since the content of the first item is different in the fifth record, it is necessary to input the first item, so the previous data import switch is turned back (off) and data F of the first item is input. If there is a delay in the internal processing, data E is retrieved from the first-in, first-out buffer storage mechanism for the internal processing of the fourth record at the time point 4 in FIG. 4, but the operator has already entered the data for the fifth record. Since the previous data capture switch was returned (off), internal processing detects this state and processes data E as the first item of the fourth record, resulting in an error.

[Means for solving problems]

The state transition synchronization method of the present invention processes code data via a first-in, first-out buffer storage mechanism, and detects a change in the state information in a data processing system that controls the content of the processing based on another state information. A mechanism for detecting the status from the encoded data is provided at an entrance portion of the first-in, first-out buffer storage mechanism, and a mechanism for detecting a state from coded data is provided at an exit portion of the first-in, first-out buffer storage mechanism.

〔Example〕

Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows an embodiment of the invention.

In FIG. 1, this embodiment includes a first-in, first-out buffer storage mechanism 1001, a coding mechanism 1002 connected to the inlet portion for detecting and encoding changes in the external state, and a first-in, first-out buffer for merging input data and state coded data. A writing mechanism 1003 that sends data to the buffer storage mechanism 1001, a reading mechanism 104 that retrieves data from the first-in, first-out buffer storage mechanism 1001 and detects and distributes status coded data, and a continuation mechanism 1004 that stores the detected status information. state storage mechanism 10()5.

In this embodiment, the encoding mechanism 1002. Writing mechanism 1003
The dispensing mechanism 1004 is 10 gram control. The operation of these program controls is shown in the flowchart of FIG.

In FIG. 2, the encoding mechanism 1002 is the writing mechanism 10.
This is a subroutine that is called and executed from 03. When the encoding mechanism 1002 is activated, it inputs the external state (2a), checks whether the external state has changed from the previously read state (2b), and returns NULL if the state is the same as before.
Set the code as the return value of the subroutine (2
f). If the state is different from before, check the current state (2c
), if it is on, set the on status code as the return value 2d), and if it is off, set the off status code as the return value (2e).

The writing mechanism 1003 is a subroutine that is activated every time input data is input. When the writing mechanism 1003 is activated,
Subroutine call (3a) to code writing machine side lθ02,
Check its return/value 3b).

If it is a value other than NULL, the return value is sent to the first-in, first-out M storage mechanism 1001 (3c).

The input data is then read (3d) and sent to the first-in, first-out buffer storage (3C).

The reading mechanism 1004 is a subroutine called by a request from internal processing. When the read mechanism 1004 is called, it reads the data from the first-in, first-out buffer storage 4a) If the read data has an on state code (4b), it turns on the state storage 1005 (
4f), read the data again and repeat the process from 4a). If the read data or OFF status code (4c
), state storage mechanism 1 (old) 5 is turned off (4e), data is read again, and the process is repeated from 4a). If the read data is not one of the status codes, the read data is passed to internal processing as a return value.

Through the above-described operation, changes in the external state are delayed and notified at a timing that corresponds to the progress of internal processing.

In this way, this embodiment solves the above-mentioned problems, and also inputs information indicating that the external state has changed into the first-in, first-out buffer memory, and determines the position of data that is successively input to the first-in, first-out buffer. This system is equipped with a mechanism that detects changes in state information at the entrance of the first-in, first-out buffer storage mechanism by storing changes in the external state in that order, and detects the coded state information at the exit. be.

〔Effect of the invention〕

As explained above, the present invention can notify the internal processing of changes in the external state together with the data input order, even if the internal processing speed is temporarily unable to keep up with the rapid change in the external state. This has the effect of ensuring that processing is performed correctly.

Brief description of the drawings (2) Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is a flowchart relating to the mechanism of the main parts of Fig. 1, and Fig. 3 is for explaining problems. FIG. 4 is a diagram showing an example of data, and FIG. 4 is a diagram showing a time chart when a problem occurs.

1001...first-in, first-out buffer storage mechanism, 1002...
... Encoding mechanism, 1003 ... Writing mechanism, 1004
...Reading mechanism, 1005... State storage mechanism.

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Claims (1)

[Claims] In a data processing system that processes code data via a first-in, first-out buffer memory and controls the content of the processing using another state information, the first-in, first-out buffer has a mechanism that detects and encodes changes in the state information. A state transition synchronization method characterized in that a mechanism is provided at the entrance of the mechanism and a mechanism for detecting the state from coded data is provided at the exit of the first-in, first-out buffer storage mechanism.