JPH02310652A - Memory controller - Google Patents

Abstract

PURPOSE:To obtain a memory controller securing a sufficient work area by providing a system file memory and a means which selectively loads respective program files on a work memory based on selective load information and which sets an arbitral system. CONSTITUTION:RAM 3 residence-stores BISO and a system program in a prescribed address at the rise time of a system and a display part 4 displays the input command of an operation part 5, the operation result of CPU and the like. A system setting file memory 6 stores selective load information which is set for RAM 3 with respect to hardware, and controls a selective load processing based on arbitral system file information in the system setting file memory 6 so as to construct the arbitral system. Thus, the memory controller securing the sufficient work area can be obtained.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a memory device that starts up a system by loading a program written in a fixed memory into a memory space, and particularly relates to a memory device that starts up a system by loading a program written in a fixed memory into a memory space. The present invention relates to a memory control device.

(Prior Art) Conventionally, in this type of device, various system programs, application programs, driver programs, etc. stored in a fixed memory such as a ROM are loaded into a storage medium such as a RAM from a predetermined address to operate the system. The processor executes the startup IPL process.

Then, after analyzing the command inputted from the operation unit or the like and performing software processing according to the stored procedure, processing such as displaying the results is performed.

(Problem to be Solved by the Invention) However, when reading from a ROM etc. and storing it in a RAM, all programs stored in the ROM are
There are programs that are not used by the environment or media because they reside on M. It happens.

Therefore, as programs that are not originally needed are constantly stored in RAM, the memory capacity of RAM is compressed, making it extremely difficult to execute functional processes that require memory capacity, and causing problems such as a significant decrease in processing speed. occurs.

If you try to deal with this problem with a dedicated chip according to the user or media type at the ROM chip development stage, the ROM
This resulted in significant development costs and had problems such as difficulty in responding to changes in specifications.

This invention was made to solve the above problems, and when a system program is launched from ROM onto RAM, loading of a predetermined program onto RAM is restricted according to set restriction file information. By doing so, it is an object of the present invention to provide a memory control device that can secure a sufficient work area by limiting the resident program area that occupies a RAM with a -window storage capacity.

[Means to solve the problem]

The memory control device according to the present invention includes a system file memory that stores selective load information of program files stored in a fixed memory, and a system file memory that stores program file selective load information stored in the system file memory in the fixed memory at the time of system loading. The system is provided with a system setting means for selectively loading each program file into a work memory and setting an arbitrary system.

(Operation) In this invention, when the system load is started,
The system setting means selectively loads each program file stored in the fixed memory into the work memory based on the selective load information stored in the system file memory, configures any system, and configures any system on the same hard media. It makes it possible to build a system.

〔Example〕

FIG. 1 is a block diagram illustrating the configuration of a memory control device showing an embodiment of the present invention, in which 1 is a CPU, a BIOS program stored in a ROM 2 serving as a fixed memory,
Each device connected to the bus is controlled based on a system program (a control program mainly consisting of application programs). 3 is RAM, which serves as work memory and is transferred from ROM2 to B at system startup.
IOS programs and system programs are stored residently at predetermined addresses. Reference numeral 4 denotes a display unit that displays commands input from the operation unit 5, calculation results by CPUGI, and the like.

6 is a system setting file memory, which stores system files to be set in RAM 3 for hardware, that is, selective load information, and is
The PUI (system setting means) controls the selective loading process of each program file to the work memory (RAM3) based on arbitrary system program file information stored in the system setting file memory 6, which is the system file memory, and Build any system on hard media.

Note that the system setting file memory 6 is not particularly limited to the type of storage medium as long as the medium can be read, such as a floppy disk, static RA, etc.
It is also possible to configure it with M or the like.

FIG. 2 is a schematic diagram illustrating the loading process to the RAM 3 shown in FIG. 1, and 11 is an O3 area where, for example, a disk operation system resides. 12 is a command area, and 13a.

Reference numeral 13b denotes a system area, in which, for example, among the applications 1 to 13 stored in the ROM 2, the application 1.11 specified by the selective load information is stored as a system program. 14 is a BIOS system area, which is an area where the basic system is stored.

FIG. 3 is a flowchart illustrating an example of the system loading processing procedure according to the present invention. Furthermore, (1)
~(3) shows each step.

First, when power is applied to the system's CPU board,
This flow performs a startup and basic system setup (1), and performs checks on hardware and various status settings during normal system startup.

Next, the selected load information (in this embodiment, a command to load application 1.11 is written) stored in the system setting file memory 6 is read (2), and the specified driver on the ROM 2 is loaded. Then, the application is selectively read into the RAM 3, the system is registered (3), the loading process is finished, and the system starts operating normally.

In this way, an individual processor system can be constructed using the same hardware and the same ROM 2 by instructions written to the system setting file memory 6.

〔Effect of the invention〕

As explained above, the present invention includes a system file memory that stores selective load information of program files stored in a fixed memory in priority order, and a system file memory that stores selective load information of program files stored in a fixed memory, and a system file memory that stores program file selective load information stored in the system file memory at the time of system loading. This system is equipped with a system setting means that selectively loads each program file stored in the memory into the work memory and sets the desired system. This makes it possible to start up a system with a high level of versatility, and has excellent effects such as smoothly executing and checking the development of a highly versatile system.

[Brief explanation of the drawing]

FIG. 1 is a block diagram illustrating the configuration of a memory control device showing one embodiment of the present invention, and FIG.
FIG. 3 is a schematic diagram illustrating the loading process to AM, and is a flowchart illustrating an example of the system loading process procedure according to the present invention. In the figure, 1 is a CPU, 2 is a ROM, and 3 is a RAM. 4 is a display section, 5 is an operation section, and 6 is a system setting file memory. Figure 1: Scarcity map

Claims (1)

[Claims] In a memory device that executes a program by causing a plurality of program files stored in a fixed memory to reside on a work memory, the system file memory stores selective load information of the program files stored in the fixed memory, and a system load. and system setting means for selectively loading each program file stored in the fixed memory into the work memory based on the selective load information stored in the system file memory and setting an arbitrary system. A memory control device characterized by: