JPH05282215A - Initialization system for memory - Google Patents

Abstract

PURPOSE:To execute an initialization by exactly discriminating a momentary interruption long-term interruption and a memory destruction at the time of starting the initialization even at the time of the version-up a program. CONSTITUTION:An identification number and an initialization item are stored in an ROM (1-1-1-n) and an RAM (2-1-2-m) which store a program. At the time of starting a system, each identification number stored in the ROM (1-1-1-n) and the RAM (2-1-2-m) is compared, and when they are matched, the momentary interruption or long-term interruption of the power supply is discrimination and the initialization according to the momentary interruption of long-term interruption is executed. And also, when they are not matched, a memory destruction and a program version-up are discriminated, and the initialization is executed in accordance with the initialization item stored in the ROM (1-1-1-n). Then, the identification number and initialization item stored in the ROM (1-1-1-n) are transferred to the ROM (2-1-2-m), and stored.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ROM version upgrade of an information processing system having a ROM and a RAM, and more particularly to a memory initialization system when the ROM version is upgraded.

[0002]

2. Description of the Related Art In the initialization start of a program, the contents to be initialized are distinguished according to the purpose of starting the program such as power-on and internal factors of the system. That is, the initialization start is a momentary stop,
It is classified according to the three cases of long stoppage and memory destruction.

FIG. 5 is a diagram showing such a memory initialization method. After performing self-diagnosis of ROM, RAM, etc. in step # 1, it is judged in step # 2 whether or not memory is destroyed. Moving to step # 3, it is judged whether it is an instantaneous stop or a long stop. If it is a momentary blackout, the system initialization is set in the area associated with the momentary blackout in step # 4, and if it is a long blackout, the system initialization is set in the area associated with the long blackout in step # 5.
If the memory is destroyed, the system initialization is set in the area associated with the memory destruction in step # 6.

Here, concretely, the power is turned off (O
This is a case where the FF) time is comparatively short and the parameters for operating the system necessary for operating the device and the operation information parameters operating until the power is turned off are not destroyed. Note that turning off the power includes those that are artificially performed such as a power failure and those that are not artificial.
In this momentary power failure, generally, the initialization by the hot start continued from the contents when the power was turned off,
After this, the system is restarted.

In the long stop, the power supply is turned off (OFF) as described above.
This is a case where the power-off time is a relatively long period while the operating time is a relatively short period and the parameters and the operation information parameters are not destroyed. In this long stop, the operation information parameter is initialized and the operation is started by cold start, and then the system operation is restarted.

On the other hand, the memory destruction is a case where the above parameters or the operation information parameters are destroyed due to some cause. In this memory destruction, the system parameters for operating the device are downloaded, the operation information parameters are initialized, and the cold start is performed to start the operation.

That is, the program stored in the ROM is upgraded, and if there is a difference in the arrangement of the operation information parameters generated by the program, the memory is destroyed. If not, there is a long stop or a momentary interruption due to the length of the power failure. There are various cases in which it is determined that the operation is stopped and the operation must be started after the operation information parameters are initialized even if the system operation parameters remain unchanged.

However, there are cases where it is not possible to determine that the memory has been destroyed, even if the version of the program is upgraded and the operation information parameters generated by the program have different arrays. That is, the general method of judging memory corruption is
It is assumed that one or more ROMs arranged in one or more predetermined locations do not have any predetermined content. In other words, if a change is made over a certain address, it is determined that the memory is destroyed, but if not, it is not determined that the memory is destroyed. In this way, there are cases in which initialization cannot be performed as intended.

In particular, as the operation information parameter, not only a RAM area used temporarily for work, but also an integrated value such as a pulse integrated value, an operating time, or a jump destination address of a program may be stored in the RAM area. Therefore, the RAM area temporarily used is initialized before being used, that is, the integrated value is initialized to “0”, and then the integration is started, and the jump destination address is transferred to the ROM or the RAM. It is necessary to set the address before starting the operation.

[0010]

As described above, there are cases where it is not possible to determine that the memory has been destroyed, even though the program has been upgraded and the operating information parameters generated by the program have different arrangements.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a memory initialization method in which even if the program is upgraded, the initializing start can surely distinguish the momentary power failure, the long power failure and the memory destruction.

[0012]

According to the memory initialization method of the present invention, the program identification number and the initialization item are stored in the first memory in which the program is stored, and the program identification number and the initialization item are stored. Are stored in the second memory. In this state, the identification numbers stored in the first memory and the second memory at the time of starting the system are compared, and if they match, it is determined that there is an instantaneous stop or a long stop. If they do not match, it is determined that the program version has been upgraded, initialization is performed according to the initialization item stored in the first memory, and then the program identification number and the initialization item stored in the first memory are transferred to the second memory. And remember.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In the information processing system, as shown in FIG.
OM1-1 to 1-n and RAM2-1 to 2-m are provided. Programs are stored in the ROMs 1-1 to 1-n. Of these ROM1-1 to 1-n, ROM1
The ROM creation date (year, month,
Date), ROM version number, and initialization item are stored. As shown in FIG. 2, the initialization items are divided into 16-bit length bits and the initialization contents are set. in this case,
Bit "1" performs self-diagnosis of memory such as ROM / RAM check, bit "2" downloads system parameter, bit "3" sets initialization (value) of system parameter, bit Set the initialization (value) of the RAM information parameter to "4",
Bit "5" initializes the pulse integration area, bit "6" initializes the operating time integration area, and bit "7" contains the ROM version number stored in ROM in a predetermined area of RAM. Each of the initialization items to be copied to is stored. The ROM creation date may be year, month, day, hour, and minute. Further, either the ROM creation date or the ROM version number may be stored. Next, the initialization method will be described.

When the information processing system is started up, it is judged in step # 10 whether the memory is damaged. If the memory is not damaged, the process proceeds to step # 11 to store the ROM version number stored in the ROM1-n and the RAM2-m. Compare with the RAM version number that has been created. If the ROM version numbers match according to this comparison, RO
If it is determined that the version upgrade of the M program has not been performed and the ROM version numbers do not match,
It is determined that the version of the ROM program has been upgraded.

Therefore, if the ROM version numbers match each other, the process proceeds to step # 12 to determine whether the power source is instantaneously stopped or is long stopped. Then, if it is a momentary blackout, in step # 13, system initialization is set for the area associated with the momentary blackout. If it is a long stop, RO is performed in step # 14.
Perform self-diagnosis of M, RAM, etc., and perform the next step # 1.
In 5, the system initialization is set for the area associated with the long stop.

Further, as a result of the comparison in step # 11,
If the ROM version numbers do not match, step #
16 self-diagnosis of ROM, RAM, etc.
In the next step # 17, the parameters are downloaded, and in the next step # 18, the system initialization is set for the area accompanying the version upgrade.

On the other hand, if the result of determination in step # 10 above is that the memory has been destroyed, the process proceeds to step # 19 and RO
Perform self-diagnosis of M, RAM, etc., and perform the next step # 2.
In 0, the parameters are downloaded, and in the next step # 21, the system initialization is set for the area accompanying the memory destruction. Then, in step # 22, the ROM version number stored in the ROM1-n is transferred to and stored in the RAM2-m. Next, a specific initialization process using the initialization method shown in FIG. 2 will be described.

When the information processing system is started up, i is set to "0" in step # 30, and the next step #
It is judged at 31 whether the memory is destroyed. If it is not destroyed at memory 31, the process proceeds to step # 32 to compare the ROM version number stored in the ROM 1-n with the RAM version number stored in the RAM 2-m.

As a result of this comparison, if the ROM version numbers match each other, the process proceeds to step # 33 to determine whether the power outage or the long outage occurs. Then, if it is an instantaneous blackout, step # 34
In, the initialization method is set based on the content of i and the initialization method associated with the instantaneous power failure. If it is a long stop, in step # 35, the initialization method is set from the contents of i and the initialization method associated with the long stop.

If the ROM version numbers do not match as a result of the comparison in step # 32, step # 3
6, the initialization method is set based on the contents of i and the initialization method stored in the ROM 1-n.

On the other hand, if the result of determination in step # 31 is memory destruction, the process moves to step # 37 to set the initialization method based on the contents of i and the initialization method associated with memory destruction.

Next, step # 38 and the subsequent steps are executed, and FIG.
Initialization is performed by executing each initialization item shown in, but in this case, only the initialization items corresponding to each case of momentary power failure, long stop, version number mismatch, memory corruption are executed. .. In this case, the priority of executing each initialization item is from bit "1" to
The order is “7”.

That is, at step # 38, it is judged whether or not there is a request for self-diagnosis of the memory such as ROM / RAM check in bit "1". To execute.

Next, in step # 40, bit "2" is set.
It is determined whether there is a request to download the system parameter in step S41, and if there is this request, the system parameter is downloaded in step # 41.

After that, RA of bit "4" for setting the initialization (value) of the system parameter of bit "3"
Set the initialization (value) of the M information parameter, initialize the pulse integration area of bit "5", bit "6"
It is determined whether or not there is a request to initialize the operating time integration area, and the requested initialization method is executed.

Then, in step # 42, it is judged whether or not there is a request to copy the ROM version number stored in the ROM of bit "7" into a predetermined area of RAM. If there is this request, ROM1-n and RAM1-
When the version numbers of m do not match, it is determined that the memory is destroyed. In this case, the ROM version number stored in ROM1-n is transferred to and stored in RAM2-m in step # 43.

As described above, in the above embodiment, the RO
At least the version number and the initialization method are stored in the M1-n and the RAM1-m, each version number stored in the ROM and the RAM is compared when the system is started up, and if they match, a momentary or long interruption of the power supply. If the version number does not match and the memory is destroyed, the initialization is performed according to the initialization method stored in ROM1-n, and the version number of ROM1-n is determined. Also, since the initialization method is transferred to and stored in the RAM 1-m, even if the initialization item stored for each bit is modified according to the version upgrade of the program, the initialization process can be surely performed. In addition, these initialization items can be arbitrarily combined by changing the order of each bit, and it is not necessary to modify the program and the program to be initialized each time the modification is made, and the initialization items of each bit are simply modified. Just enough.
The initialization item of each bit, its method, and contents may be created in advance, or may be created as needed when the version of the ROM is upgraded.

The present invention is not limited to the above-mentioned embodiment, and may be modified within the scope of the invention. For example, instead of storing each initialization item for each bit, one initialization item may be stored over a plurality of bits.

The following method may be used instead of comparing the ROM version number with the RAM version number. For example, the version number of the ROM is not one in the system or device, but may be added in the ROM device unit, or in the case of a program or the like that spans a plurality of devices, the version number may be attached in the program unit. In this case, the ROM version number stored in the RAM may be stored corresponding to the ROM, or may be stored as a calculation result based on a predetermined calculation method such as a value obtained by adding each value. ..
Also, instead of storing in RAM, other memory such as EE
It may be stored in the PROM element.

On the other hand, not only the version number but also a numerical value counted up each time a program is created may be set instead. That is, the count value stored in the ROM and the count value stored in the RAM may be compared to determine the version upgrade.

[0032]

As described above in detail, according to the present invention, even if the program is upgraded, the initialization start is performed by the memory initialization method which can surely distinguish the instantaneous stop, the long stop and the memory destruction. Can be provided.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing the contents of a ROM / RAM of an information processing system to which a memory initialization method according to the present invention is applied.

FIG. 2 is a diagram showing an initialization method performed by the same method.

FIG. 3 is a flowchart for initializing the method.

FIG. 4 is a flow chart of initialization of the method.

FIG. 5 is a flow chart of initialization of a conventional method.

[Explanation of symbols]

 1-1 to 1-n ... ROM, 2-1 to 2-m ... RAM.

Claims (1)

[Claims] 1. A program for storing a program in a memory initializing method, which judges whether a power failure, a power failure, or a memory destruction for an operation information parameter generated by a program at the time of system startup and performs initialization accordingly. The program identification number and the initialization item are stored in the first memory, and the program identification number and the initialization item are stored in the second memory. The program identification number and the initialization item are stored in the first memory and the second memory when the system is started up. The respective identification numbers are compared, and if they match, it is determined to be the instantaneous power failure or the long power failure, and if they do not match, it is determined to be the program version upgrade and initialization is performed according to the initialization item stored in the first memory. Stored in the first memory after this Initialization method of memory and to store and transfer the program identification number and the initialization items to the second memory.