JPS63155331A - Control system for microprogram - Google Patents

Abstract

PURPOSE:To quickly carry out the next processing without interrupting the present processing by using at least two working areas on a memory and performing the switch between both working areas when a microprogram detects the abnormality. CONSTITUTION:A memory 2 is provided with a microprogram part 3 and 1st and 2nd working areas 4 and 5. If a microprogram detects the abnormality while the area 4, for example, is used for processing, the processing is through in an abnormal state in the area 4. Then the end of the processing is reported to a CPU 1 and at the same time the area 4 is switched to the other area 5. This area 5 is initialized and carried out the next control processing.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a microprogram control method for performing III control processing according to a microprogram installed in advance.

(Prior Art) Conventionally, Haji's microprogram control system has a configuration in which a single work area is set up in the memory of the microprogram, and control processing is executed only in this single work area.

Therefore, if any abnormality occurs during processing, either initialize the work area and execute the next process, or stop the processing at the time the abnormality occurs, collect detailed information at that point, and then I had to initialize the work area and execute the next process.

(Problems to be Solved by the Invention) In the conventional microprogram control method described above, detailed information at the time of the occurrence of the abnormality is erased when executing the next process after the occurrence of the abnormality.

There was a problem in that the cause of the abnormality could not be determined. In addition, in order to clarify the cause of the abnormality, if you stop the processing and collect detailed information at the time of the abnormality,
There was a problem that the original control processing was delayed.

The present invention was made to solve these problems, and even if an abnormality occurs during work, it can proceed quickly without interrupting the process, and it can be The purpose is to provide a microprogram control method that can collect even detailed information.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a microprogram control method in which control processing is performed according to a microprogram installed in advance on a memory, in which at least two operations are performed on the memory. region? If an abnormality occurs during control (goods) processing using one work area, the system switches to another work area and continues.

(Actual Stream Side) Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of control lA# that executes the microprogram control method according to the present embodiment, and FIG. 29 is a flowchart showing a buffer switching operation when a microprogram employing the same method detects an abnormality.

In FIG. 1, 1 is a central processing unit (CPU) and 2 is a memory. On the memory 2, there is a microprogram section 3.
and two working areas (ie, a first working area 4 and a second working area 5). The central processing unit 1 is
According to the microprogram stored in the microprogram s3 in advance, either one of the work areas 4 or 5
is used to control the interface control unit 6 and peripheral control device 7. Note that the peripheral control device 7 includes ;!
An imprinter 8, console 9, etc. are connected.

Furthermore, the following program is input to the microprogram section 3 for operation in the event that an abnormality occurs during work execution (see Figure 2). Processing in progress (temporarily, first work area 4
If the microprogram detects an abnormality, the processing in the first work area 4 is abnormally terminated.

Then, the completion report is sent to the central processing unit f! tl and switches the work area to the second work area 5.

Thereafter, the second work area 5 is initialized, and the next control process is executed using this second work area 5.

Even when an abnormality is detected during execution of processing using the second work area 5, the work area is similarly switched and the next control process is executed using the first work area.

Therefore, even if an abnormality occurs during execution of a process, the next control process can be executed without delay. Furthermore, since detailed information at the time of the abnormality occurrence remains in the work area that was used before switching, the operator outputs a memory dump to the line printer 8 based on the abnormality notification from the central processing unit l. , it is possible to collect detailed information when an abnormality occurs.

In the above embodiment, two work areas are provided in the memory, but the present invention is not limited to this, and three or more work areas may be provided.

(Effects of the Invention) As explained above, the present invention has at least two working areas in memory, normally uses one working area to execute processing, and when a microprogram detects an abnormality, , by switching the entire work area and using another work area.

Since you can leave a work area in the event of an error, you can quickly move on to the next process without interrupting the process.
Moreover, it has the effect of being able to collect detailed information when an abnormality occurs.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a control device that executes a microprogram control method according to an embodiment of the present invention, and FIG. 2 is a flowchart showing a buffer switching operation when a microprogram employing the same method detects an abnormality. It is. l...Central processing unit 2...Memory 3...Micro program section 4...First work area 5...Second work area 6.
...Interface control unit 7...Peripheral control device 8...Line printer 9...
...Console patent applicant NEC Corporation representative Patent attorney Inoro 4 years old 1 figure 2 years old

Claims (1)

[Claims] In a microprogram control method in which control processing is performed according to a microprogram installed in advance on a memory, when at least two work areas are provided on the memory and an abnormality occurs during control processing using one work area. is a microprogram control method that is characterized by switching to another work area and continuing the work.