JPS61128350A - Version changing device - Google Patents

Abstract

PURPOSE:To initialize a RAM precisely at the replacement of a ROM of which version is updated by updating the version of the RAM in accordance with the version of the ROM when the difference of versions between the ROM and RAM is decided. CONSTITUTION:When a P-ROM2 in a version A is supported to be used, the version of a RAM3 is set up also to the version A. When a power supply is turned off, a P-ROM in a version B is replaced by a P-ROM of which version is updated and then the power supply is turned on again, the version of the ROM2 is compared with that of the RAM3. Since the versions A, B of the ROM2 and the RAM3 are different, version change is decided. Then, all areas of the RAM3 are cleared and initialized and the version of the RAM3 is updated to the version B. Thus, the automatic clear routine is ended.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field The present invention relates to a battery-backed RAM version changing device in a microcomputer.

Summary of the Invention For example, in a mechanism constituting an ATM, in a coin processing section that receives and receives coins, the number of coins is managed by dividing the inside of the processing section into multiple sections. Since the data indicating how many coins are present in each part has 4q to be stored even if the power is turned OFF/OFF, a RAM such as 0MO3 with battery back-amplification is used as the number storage means. The version change device according to the present invention compares the RAM version and the ROM version, and when the version does not match, it determines that it is a ROM version amplifier, automatically clears all RAM areas, and The version is updated to the ROM version.

(C1 Prior Art and Its Disadvantages) Even after the power is turned OFF/OFF in devices with RAM and ROM, the previous device state is stored in the RAM (if this is required, the RAM is backed up by a battery). Normally, such RAM data should not be cleared, but when the ROM is version-amplified and the absolute address of the RAM area changes, R
□When M is replaced, the data in the RAM becomes meaningless and requires initialization. As one measure against this,
It is conceivable to set data that needs to be always stored at a location where the absolute address does not change due to version upgrade, for example, at the beginning of the RAM area. However, this cannot cope with cases where a large amount of data needs to be constantly stored due to changes in equipment specifications. Another possible countermeasure is to provide a means to manually clear the RAM, and then have the worker clear and initialize it when replacing the ROM. There are some problems that require it.

(d) Purpose of the Invention In view of the above-mentioned points, the purpose of the invention is to
To provide a version change device that can automatically clear an area of M.

(81 Structure and Effect of the Invention This invention sets a version in the RAM area corresponding to the ROM version, and when the power is turned on, the ROM and RA
A comparison means for comparing versions of M, and a means for clearing all RAM areas and updating the RAM version to match the ROM version when the comparison means determines that the ROM and RAM versions are different. It is characterized by having the following.

With the above configuration, according to the present invention, when the ROM version and the RAM version are compared and the versions are different, all RAM settings are automatically cleared.
can be reliably initialized.

(f) Embodiment FIG. 2 is a block diagram of a coin processing section of an ATV to which the present invention is applied.

The control system is CPU1. P-ROM2. It is composed of a microcomputer system consisting of RAM3. RAM
3 consists of CMO3 and is backed up by battery 4. Parallel Interface Adapter (PIA)
) is electrical components 6 such as sensors, motors, solenoids, etc. installed in the coin processing mechanical section 7 and CP! It is intended for interfacing between - Figure 3 is a diagram showing the configuration of RAM. The first address M1 is assigned to the memory child rear of the version that indicates which version of the P-ROM program uses the RAM. M2 is a storage area for coin number data that should be stored at all times. The data on the number of coins existing in each part of the coin processing section is stored and held in the storage area M2 by battery backup even if the power is turned off.

Next, the automatic clearing operation of the RAM area will be explained. FIG. 1 shows the automatic clearing routine of the RAM area.

Now, assuming that P-ROM2 of 'A゛Ao version is being used, the version of RAM3 is also set to 'Ao.'Here, turn off the power and set the P-ROM that has been virgin upgraded to 'B° version. After replacing the ROM, turn on the power again. Then, the program executes a RAM area automatic clear routine starting from step nl (hereinafter simply referred to as step n't4). First, the version of RAM3 is read (nl). Next, the P-ROM version and RAM version are compared (n2). Since there is a difference between the version of A° and version 2 of "B", it is determined that the version has changed.Next, the version of R
All areas of AM3 are cleared and initialized, and the version of RAM3 is upgraded to "B" (n3.n4).The automatic clear routine is thus ended and the program proceeds to the next step.

Next, when the power is turned off and then turned on again after the version upgrade, the versions of the RAM and P-ROM are compared by the automatic clear routine described above. In this case, since both versions match in “B° version,” the RAM
Exit without clearing the area and proceed to the next step. With the above operation, all RAM areas can be cleared only when upgrading the P-ROM. In addition, as mentioned above, since the coin number data that should always be stored is stored in the RAM area whose absolute address changes with version upgrades, the amount of coin number data increases with version changes without being subject to restrictions on data storage capacity. can also be adequately addressed.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the coin processing unit of an ATM to which the present invention is applied, and FIG. 2 is a diagram showing the RAM area of the coin processing unit.
FIG. 3 is a flowchart showing the specific operation of version change in the coin processing section.

Claims (1)

[Claims] (1) Battery-backed RAM and ROM
In devices equipped with
A comparison means for comparing M and RAM versions, and when it is determined by the comparison means that the ROM and RAM versions are different, all RAM areas are cleared and the RAM version is updated to match the ROM version. A version changing device comprising means.