JPS6117600Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an information storage device constituted by a memory package equipped with a backup power source.

In conventional computer systems, files for storing data and programs are created on external storage devices such as magnetic tapes and magnetic disks.
After reading data from the external storage device to the internal storage device via the interface and processing it as necessary,
It is saved to the external storage device again. However, when files are created in an external storage device as in the conventional method described above, loading time from the external storage device is required before the program can actually be used, and the program, data, etc. are transferred to the external storage device after processing is completed. There was a problem in that it required time to evacuate and the processing efficiency decreased. In addition, each time a file created in an external storage device is used, data is transferred between the computer and the external storage device, so mistakes are likely to occur during recording and playback, resulting in a lack of reliability. .

The present invention has been developed in view of the above points. By creating files in an internal storage device, access time can be improved, recording and playback can be ensured, and the reliability of files can be improved. The purpose is to provide equipment.

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a computer main body, which includes a keyboard 2, a CRT display section 3, and an internal storage device 4. This internal storage device 4 stores first to fourth
It consists of RAM (random access memory) packages 5a to 5d, and is detachable from the computer main body 1. Each of the above RAM package cages 5
A to 5d have internal backup batteries, and when inserted into the computer main body 1, main body power is supplied, and when removed from the computer main body 1, the main power supply is switched to the internal battery to protect the stored contents. Further, when the main body power is not turned on, the memory contents of the RAM packages 5a to 5d are protected by internal batteries. Addresses are assigned to the RAM packages 5a to 5d in order, for example, from the left side of the mounting location, and the first RAM package 5a has addresses 0 to 5d.
Address 4095, 4096 in the second RAM package 5b
Addresses are sequentially addressed such as addresses 8192 to 8191 to 8191, addresses 8192 to 12287 to the third RAM package 5c, and addresses 12288 to 16383 to the fourth RAM package 5d.

Therefore, the internal storage device 4, for example,
0 of the first RAM package 5a as shown in the figure.
A system area is created at the address, and the first
The area after address 1 of RAM package 5a and the second
A work area is formed in the entire area of the RAM package 5b. And the third and fourth RAM
Packages 5c and 5d are used as file areas. The internal storage device 4 is connected to a CPU (central processing unit) 11 in the computer main body 1 via an address bus AB and a data bus DB. A control ROM (read-only memory) is provided in the computer main body 1, and this control ROM
CPU 11 according to control instructions read from 12
works. Further, input from the keyboard 2 is given to this CPU 11 .

Thus, the start address of the file area, for example address 8192, is written in the system area of the internal storage device 4. That is, by writing the address of the internal storage device 4 from which the file area should be set to address 0, that is, the system area,
The area after that specified address can be defined as a file area. In this case, by setting the address to be written to the system area as a multiple of 4096, the work area and file area can be separated for each package. On the other hand, in the file area, as shown in FIG. 3, a file flag a is stored at the package top address (1 byte), and a file type b is recorded at the next address (1 byte). Above file flag a
indicates the usage content of the package, and if it is used as a file, it should be all "1",
If the package is empty, set it to "0". Further, the file type b indicates the contents of the file, and a code of "00" is written in the case of data, and "01" in the case of a program. Further, in the file area, a file name c is recorded in an 8-byte area following the recording area of the file type b, and data d is recorded thereafter.

Next, the operation when recording to the file area will be explained with reference to the flowchart of FIG. File usage command from keyboard 2
When the data is sent to the CPU 11, the operation of the flow shown in FIG. 4 is started according to the program in the control ROM 12. Data to be filed is written in the work area of the internal storage device 4, but
First, the top address where the data to be filed is stored is set in the address register A in the CPU 11, and the number of bytes to be transferred to the file area is set in the data register D. Thereafter, as shown in step _S1 in FIG.
is read out. And this address register B
The contents of the first address of the file area are read out according to the contents of , and in step _S2 it is checked whether it is a file flag, that is, whether a file has already been registered. If it is determined in step _S2 that the file has already been registered, the process advances to step _S3 , and the contents of address register B are stored in the final RAM package, in this case the fourth RAM.
It is determined whether the start address of the package 5d is greater than or equal to "address 12288." If this determination result is YES, it is an error and the process proceeds to error processing. step
If the determination result in _S3 is NO, the process advances to step _S4 , adds "4096" to the contents of address register B, and returns to step _S2 . Empty packages are detected through the steps _S2 to _S4 described above. Then, if the determination in step _S2 is NO and an empty package is detected, the process advances to step _S5 , and the address register B
Writes a file flag to the first address of the file area specified by the contents of . Next, in step _S6 , the contents of address register B are set to "+".
1" to the next address in the file area, and write the file type, for example code "01" indicating the program, at that address as shown in step _S7 . Furthermore, in step _S8 , the contents of address register B are incremented by "+1" to specify the next address.
Write the file name at that address as shown in step _S9 . This file name is written to an 8-byte area, so address register B
This is done while sequentially adding "+1" to the contents. When writing of the file name is finished, the address register indicates the starting address of the data recording area. Next, proceed to step S ₁₀ and CPU11
The contents of the internal storage device 4 are read into the data register C according to the contents of the address register A in the file area, and the contents of the data register C are transferred to the file area specified by the address register B as shown in step _S10 . Write. Next, the process advances to step _S12 , where the contents of address registers A and B are both set to ``+''.
1”. After that, in step ₁₃ , the contents of data register D, that is, the number of transferred bytes, are set to "-1", and
In step _S14 , it is determined whether the contents of data register D are "0" or not. That is, this step
In _S14 , it is determined whether writing of data of a predetermined number of bytes has been completed. If the determination result in step _S14 is NO, the process returns to step _S10 , where the address of internal storage device 4 is specified based on the contents of address register A, and the contents are read into data register C. Thereafter, steps _S10 to _S14 are repeated in the same manner, and the program stored in the work area of the internal storage device 4 is transferred to the file area. Then, the transfer of the program of the predetermined number of bytes is completed, and the contents of data register D become "0".
, the condition is detected in step _S14 and
Finish creating the file.

Next, the file playback operation will be explained with reference to the flowchart of FIG. When a load command is sent from the keyboard 2 to the CPU 11, the operation of the flow shown in FIG. 5 is started according to the control program stored in the control ROM 12.
First, the top address of the transfer destination work area is set in address register A in the CPU 11, and the number of transfer bytes is set in data register D. Thereafter, as shown in step _S21 in FIG. 5, the content "8192" of address 0 (system area) of internal storage device 2 is read to address register B in CPU 11. Then, the contents of the first address of the file area are read out based on the contents of address register B, and it is checked in step _S22 whether or not a file flag has been written. If it is determined in step _S22 that the file flag has not been written, that is, the file has not been registered, the process advances to step _S23 .
It is determined whether the contents of address register B are greater than or equal to "address 12288". If this determination result is YES, it is an error and the process proceeds to error processing. step
If the determination result in _S23 is NO, the process advances to step _S24 , adds "4096" to the contents of address register B, and returns to step _S22 . File package detection is performed through steps _S22 to _S24 . If YES is determined in step _S22 and an empty package is detected, the process advances to step _S25 , where attribute match detection is performed, that is, whether or not the file name matches the specified file name is performed. step
If the determination result in _S25 is NO, the process returns to step _S23 , and if YES, the process proceeds to step _S26 . In step _S26 , data is read from the file area designated by the contents of address register B and loaded into data register C. and,
As shown in step _S27 , the contents of the data register C are written into the work area of the internal storage device 4 designated by the contents of the address register A. Thereafter, in step _S28 , the contents of address registers A and B are both incremented by 1, and in step _S29 , the contents of data register D are incremented by 1. Next, in step _S30 , it is determined whether the contents of the data register D are "0" or not, and if it is not "0", the process returns to step _S26 . Steps S ₂₆ to _{S 30} above
By repeating this, file data is loaded into the work area via data register C. Then, when a predetermined number of bytes of data is transferred from the file area to the work area, the contents of data register D become "0" and the state changes to step.
It is detected in _S30 and the file data playback operation ends.

As described above, according to the present invention, the internal storage device is constructed using a RAM package backed up by a battery, and files are created in this internal storage device, thereby shortening the access time. processing efficiency can be improved, and storage and playback are reliable and reliability can be significantly improved. In addition, the program can be used immediately by inserting the desired RAM package into the computer main body, so waiting time can be eliminated. Additionally, RAM packages can be pulled out and stored after use, allowing new RAM packages to be added in their place, allowing unlimited memory expansion regardless of CPU power. Therefore, no external storage device is particularly required.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is an external perspective view of the computer main body using the information storage device of the present invention, and Fig. 2 shows the internal storage device and CPU.
3 is a diagram showing the file contents, FIG. 4 is a flow chart showing the file recording operation, and FIG. 5 is a flow chart showing the file reproducing operation. 1... Calculator body, 2... Keyboard, 3...
CRT display section, 4...Internal storage device, 5a to 5d
...RAM package, 11...CPU, 12...
Control ROM.

Claims (1)

[Scope of claims for utility model registration] A plurality of batteries each backed up by a battery.
In an information storage device in which a RAM package is detachably installed in a computer main body, means for recording a file flag indicating that a recording area is a file when storing file data in the storage device of the RAM package;
It comprises a means for recording the format of the file data to be recorded and a means for recording the file name of the file data to be recorded, and when reading the file data with the specified file name from the storage device of the RAM package, means for detecting a file area by detecting a file flag; means for detecting a file name of the detected file area and detecting a specified file name; and reading file data from the file area of the detected file name. An information storage device comprising: means.