JPH0836531A - Pos terminal device - Google Patents

Abstract

PURPOSE:To facilitate the restoration of data and improve the reliability by mirroring the floppy disk device at a POS terminal device by using a dedicated RAM. CONSTITUTION:When a CPU 2 makes a request for writing to the floppy disk device 5, a dummy mirroring process part 3 writes data to the floppy disk device 5 and mirroring dedicated RAM 4 and when a read request is received from the CPU 2 or when read of the floppy disk device 5 becomes abnormal, the data are read out of the mirroring dedicated RAM and reloaded to the floppy disk. At this time, verification is performed on the mirroring dedicated RAM 4 and floppy disk device 5 and if abnormality occurs, an operator is urged to change the medium, thereby reloading the data to a different medium. Verification is performed even when the medium is discharged and if abnormality occurs, a process similar to that at read time is performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a _{method and apparatus for} pseudo-mirroring a floppy disk in a POS terminal device.
In particular _{, the present invention} relates to a _{method and apparatus} for pseudo-mirroring a floppy disk of a POS terminal device using a dedicated RAM (Randam Access Memory) as a pseudo-mirrored disk.

[0002]

2. Description of the Related Art Conventionally, this type of mirroring of a disk has been used for the purpose of improving reliability of disk data and facilitating recovery when data is destroyed in a computer device. For example, in Japanese Unexamined Patent Publication No. 3-147121, the same data is written in two corresponding disk devices, and when an error occurs in the read data, the data of the disk in which no error has occurred is read and the data is A technique for improving the reliability of the disk is described by using a means for writing and recovering the disk in which the abnormality has occurred.

[0003]

[Problems that the Invention is to Solve Millard of this conventional disk, because it requires two disk device, a problem that must be carried out desorption of the two media there _Ru in the floppy disk drive. Further, the floppy disk unit in terms of the slow processing speed compared to the magnetic disk device, _Ru Millard of difficult der.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a POS terminal device capable of _easily recovering data when a failure in reading a floppy disk occurs.

The POS terminal _{device of the} present invention can detect the insertion of the floppy disk medium into the floppy disk device by a RAM memory for saving the information of the floppy disk medium, the floppy disk device, and software. _{characterized by} comprising a pseudo-mirrored processing unit for controlling the discharge from the floppy disk drive of the medium.

The POS terminal device of the present invention realizes pseudo mirroring by using a CPU for executing business including sales registration business and online business _and a dedicated RAM to control insertion and ejection of a floppy disk. A floppy disk device, and a dedicated mirroring RAM that is an alternative to the floppy disk device. The floppy disk device stores a medium in the pseudo mirroring processing unit 3 when a floppy disk is inserted or ejected. When the insertion signal and the medium ejection signal are generated and the pseudo-mirroring processing unit detects the medium insertion signal, the pseudo-mirroring processing unit transfers the information of the floppy disk device to the dedicated mirroring RAM without depending on the CPU, When the media ejection signal is detected, the floppy disk is ejected before ejecting the floppy disk. Wherein the verifying information and said mirrored of dedicated RAM.

According to the method of pseudo-mirroring a floppy disk in a POS terminal of the present invention, when a floppy disk is inserted in the floppy disk device, a medium insertion signal is generated from the floppy disk device and the medium insertion signal is detected. When the information of the inserted floppy disk is transferred to the RAM dedicated to mirroring and the write request from the CPU to the floppy disk device is detected,
When data is written in the same logical storage location in the mirrored exclusive RAM and the floppy disk device, and a read request from the floppy disk is detected, when an abnormality occurs in reading the data from the floppy disk, The abnormal data is transferred from the mirrored exclusive RAM to a floppy disk, the abnormal data is recovered, the recovered floppy disk and the contents of the mirrored exclusive RAM are verified, and it is confirmed whether the data has been written normally. If it cannot be recovered, the operator is notified of an error, the floppy disk is urged to be replaced, and after confirming that the floppy disk is inserted, all the data in the mirrored RAM is transferred to a new floppy disk, and the floppy disk is restored. And floppy disk If a request to eject the data is detected, the data in the mirrored RAM and the floppy disk device is verified, and if an error occurs in the verification, after the abnormal data is restored, if the error still occurs, the operator is informed. The feature is that it prompts the floppy disk to be replaced, and after confirming that the floppy disk is inserted, all data is restored.

[0008]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 shows a POS terminal device of the present invention.
_{It is a block diagram which shows one Example} .

[0010] _{Referring to} FIG. 1, POS terminal _1,
A CPU _{(Central Processing Unit)} 2 for performing ordinary business including sales registration business and online business, _and a dedicated RAM are used to realize a pseudo-mirrored floppy disk.
_Pseudo mirrored processing unit 3 for controlling the insertion and ejection of _{(medium), and a floppy disk device 5, and} mirrored reduction only RAM4 to an alternative of _the floppy disk device
Have. The floppy disk device 5 is connected to the pseudo mirroring processing unit 3 and generates a medium insertion signal _{and a} medium ejection signal when the floppy medium is inserted _or ejected. The dedicated mirroring RAM ₄ is connected (or built in) to the pseudo mirroring processing unit 3. Pseudo mirrored processing unit _3, C
It is provided between the PU 2 and the mirroring-dedicated RAM 4 and the floppy disk device 5, and when the medium insertion signal is detected, the information of the floppy disk device 5 is transferred _{to the} mirroring-dedicated RAM 4 without depending on the CPU 2 and the medium ejection signal is also sent. Is detected, the information in the floppy disk and the mirrored dedicated RAM 4 is verified before the medium is ejected.

Next, the operation of the embodiment shown in FIG. 1 will be described. When the medium is inserted into the floppy disk device 5,
A medium insertion signal is generated from the floppy disk device 5. Pseudo-mirroring processing unit 3 that has detected the medium insertion signal
Transfers the information of the inserted floppy disk medium to the mirroring dedicated RAM 4. Pseudo-mirrored processing unit 3
When the CPU 2 detects a write request from the CPU 2 to the floppy disk device 5, the pseudo-mirroring processing unit 3 writes data to the mirroring-dedicated RAM 4 and the floppy disk device 5 at the same logical storage location. Also,
When the pseudo-mirroring processing unit 3 detects a read request from the floppy disk, the pseudo-mirroring processing unit 3 reads data from the floppy disk, but if an abnormality occurs in the data at that time, the pseudo-mirroring processing unit 3 the Millard of generated data of the abnormality from a dedicated RAM4 and transferred to the floppy disk, _and recover the abnormal _data, further floppy disk medium recovery and mirrored reduction dedicated RA
Verify the contents of M and check if it was written correctly. If it cannot be restored normally, the pseudo mirroring processing unit 3 notifies the operator of the occurrence of an abnormality, prompts the operator to replace the medium, confirms the insertion of the medium, and then transfers all the data in the dedicated RAM 4 to a new floppy disk medium. , Restore the medium. When the pseudo mirroring processing unit 3 detects a request for ejecting a floppy disk medium, the pseudo mirroring processing unit 3
_{It will} verify the data Millard of dedicated RAM4 and floppy disk device _5, when an abnormality in the verification occurs, similarly to the reading error, after restoration of the abnormal data, but still a medium exchange to the operator if an abnormality occurs After confirming that the medium has been inserted, restore all data.

[0012]

As described above, according to the present invention, a floppy disk is pseudo-mirrored by using a dedicated memory, so that it can be applied to a system having only one floppy disk _device , and can be applied to a system having two floppy disks. if one is a _floppy disk _drive freely used _example that _available, so further access to memory, faster processing speed than using two floppy disk _device, also exhibits the effect of high reliability, etc..

[Brief description of drawings]

1 _{is a configuration} diagram of _an embodiment of the present invention.

[Explanation of symbols]

 1 POS terminal device 2 CPU 3 Pseudo mirroring processing unit 4 RAM dedicated to mirroring 5 Floppy disk device

Claims (3)

[Claims] 1. A RAM memory for saving information of a floppy disk medium, a floppy disk device, and software capable of detecting the insertion of the floppy disk medium into the floppy disk device, and further the floppy disk medium of the floppy disk device. Equipped with a pseudo-mirrored processing unit that controls the discharge from the
_A POS terminal _{device characterized by:} 2. A pseudo-mirroring processing unit that realizes pseudo-mirroring by using a CPU that executes sales registration business and online business _and a dedicated RAM, and controls insertion and ejection of a floppy disk, and a floppy disk. The floppy disk device comprises a disk device and a mirroring-dedicated RAM that is an alternative to the floppy disk device. When the floppy disk device is inserted or ejected, the pseudo-mirroring processing unit 3 receives a medium insertion signal and a medium ejection signal. When the pseudo-mirroring processing section detects the medium insertion signal, the pseudo-mirroring processing section converts the information of the floppy disk device into the mirroring-dedicated R information without depending on the CPU.
A POS terminal device, characterized in that, when it is transferred to an AM and the medium ejection signal is detected, the information in the floppy disk and the RAM dedicated to mirroring is verified before the floppy disk is ejected. 3. When a floppy disk is inserted in the floppy disk device, a medium insertion signal is generated from the floppy disk device, the medium insertion signal is detected, and the information of the inserted floppy disk is stored in a mirrored exclusive RAM. When the transfer is detected and a write request from the CPU to the floppy disk device is detected, the mirrored dedicated RAM and the floppy disk device are
When data is written to the same logical storage location and a read request from the floppy disk is detected, if an abnormality occurs in reading the data from the floppy disk, the abnormal data is copied from the mirrored RAM to the floppy disk. Transfer the data to a disk, recover the abnormal data, verify the recovered floppy disk and the contents of the mirrored dedicated RAM, check whether the data was written correctly, and if the data cannot be restored normally, notify the operator of the error. Prompts the floppy disk to be replaced, confirms that the floppy disk is inserted, transfers all the data in the mirrored RAM to a new floppy disk, restores the floppy disk, and detects the request to eject the floppy disk. Dedicated R
After verifying the data in the AM and the floppy disk device, if an error occurs in the verification, after recovering the abnormal data, if the error still occurs, prompt the operator to replace the floppy disk and confirm the floppy disk insertion. After that, a method of making a floppy disk pseudo-mirrored in a POS terminal is characterized in that all data is restored.