JPH03186944A - Processor system - Google Patents

Abstract

PURPOSE:To attain the speedy development of a program by treating a ROM area as a RAM area by means of exchanging modules. CONSTITUTION:A read-only ROM module 7 is exchanged to a RAM module 8 in which writing is attained at all times and the RAM module 8 is inserted into a socket 4. Thus, the program is stored in respective RAM 81 of the RAM module 8 from an external memory through peripheral IC 3 at the time of developing the program. Then, a microprocessor 1 is executed in accordance with the stored program and the control state of a whole processor system is viewed. When correction is required for the program at that time, the program in the RAM module 8 is rewritten. Thus, the program can easily be rewritten. Thus, the program stored in ROM 71 can be easily edited and rewritten.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a processor system constituting a control device such as a numerical control device or a computer, and particularly to a processor system in which the memory of the processor is modularized.

[Conventional technology]

Conventionally, in a microprocessor system, a part or all of a program is stored in a ROM, and the stored program is read and executed by a processor.
It controls the entire system.

Typically, such a microprocessor system includes a microprocessor, ROM, and
Most of them are equipped with RAM, control circuits, etc.

In this type of microprocessor system,
- Since there is no compatibility between signal terminals at the IC level between ROM and RAM in boat fishing, ROM and RAM can only be installed in predetermined locations. That is, RAM cannot be installed where ROM should be installed, and conversely, ROM cannot be installed where RA and M should be installed.

Therefore, if you want to edit or debug a program stored in ROM, you must write the program to ROM every time the editing work is completed, install the ROM in the actual microprocessor system, and check its operation. Alternatively, a method has been adopted in which a RAM for storing programs is provided in place of a ROM in an external device such as a debugging device, and editing operations are performed on the programs stored in the RAM.

[Problem to be solved by the invention]

However, every time the editing work is completed, the program is
In the method of writing to M, the contents of the ROM must be rewritten every time the program is modified, even if only a small portion is modified. In this case, the writing speed of ROM is generally very slow compared to RAM, and once written, the contents must be erased with ultraviolet rays, etc., so writing and erasing takes time and is extremely slow. The problem was that it was inefficient.

Also, when using a debug device, it is not necessarily equipped with RAM, and even if it is equipped, if the ROM capacity is larger than the RAM capacity, the RAM in the debug device will not be able to function properly. The problem is that you can't be completely satisfied.

As mentioned above, in the past, it was extremely inefficient to write a program into a ROM, or to edit or rewrite a program once written.

The present invention has been made in view of these points, and R
It is an object of the present invention to provide a processor system in which programs to be stored in an OM can be easily edited and rewritten.

[Means to solve the problem]

In order to solve the above-mentioned problems, the present invention provides a processor system that is entirely controlled by a processor that executes programs in a ROM, and is comprised of a plurality of the ROMs mounted on a first printed board. ROM
A RAM comprising a module and a plurality of RAMs mounted on a second printed board so as to have the same storage capacity as the ROM module and input/output terminals compatible with the ROM module. A processor system is provided, comprising: a module; and a socket connected to a bus of the processor system and configured to hold either the ROM module or the RAM module.

[Effect]

The ROM module is represented by a plurality of ROMs for storing programs. The RAM module is this ROM
It has the same storage capacity as the module, and ROM
It has input/output terminals that are compatible with the module, so
The processor can recognize both the ROM module and the RAM module as the same storage element. Therefore, regardless of which module is inserted into a socket connected to the bus of the processor system and configured to hold either a ROM module or a RAM module, the processor can treat it as the same storage element, allowing program editing. During rewriting work, insert the RAM module into the socket, and after completing the program creation,
Insert the ROM module into the socket and write the program. This allows the program to be stored in the ROM to be easily edited or rewritten.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing a schematic hardware configuration of a numerical control device that is an embodiment of the present invention.

In the figure, a microprocessor (CPU) 1 controls the operation of the entire numerical control device. The RAM 2 temporarily stores various digital data or human output signals. ROM
The module 7 is composed of a printed board on which a plurality of ROMs 71 are mounted, and when inserted into the socket 4,
Processor 1 via data bus 5 and address bus 6
connected to.

Further, the RAM module 8 is composed of a printed board on which a plurality of RAMs 81 are mounted so as to have the same storage capacity as the ROM module 7, and when similarly inserted into the socket 4, the data bus 5 and address bus 6 are connected to each other. It is connected to the processor 1 via.

Conventionally, the terminal structures of ROM 71 and RAM 81 were different at the IC level and were not compatible.

However, in this embodiment, a plurality of ROMs 71 are mounted on a printed board to form an R,0M module 7, and a plurality of RAMs 81 are similarly mounted on a printed board to form a RAM module 8. To ensure compatibility, the ROM 71 and RAM 81 are connected to the input/output terminals on the printed board using predetermined wiring. Therefore, no matter which module is inserted into the socket 4, it will appear to the processor 1 as a memory with the same capacity and address.

ROM71 is composed of EPROM or EEPROM,
Stores control programs. Processor 1 connects ROM module 7 via data bus 5 and address bus 6.
The program stored in each ROM 71 is read out, and various digital data are temporarily stored in the RAM 2 accordingly.

The peripheral IC3 includes various ICs for machine tool control such as nonvolatile memory, graphic control circuits, and interfaces.
Consists of.

As described above, by replacing the read-only ROM module 7 with a writable RAM module 8 and inserting the RAM module 8 into the socket 4, it is possible to program from external memory etc. via the peripheral C3 during program development. can be stored in each RAM 81 of the RAM module 8. The microprocessor 1 is executed according to the stored program, and the control status of the entire processor system is checked.

At this time, if the program needs to be modified, the program can be easily modified by rewriting the program in the RAM module 8. Additionally, the program itself can be rewritten in the same way. When the program change is completed in this manner and the program is completed, the contents of the RAM module 8 are temporarily stored in the external memory. After that, replace the RAM module 8 with the ROM module 7, and read the ROM module 7 from the external memory.
Write the contents of the program to .

As described above, according to this embodiment, the ROM area can be treated as a RAM area by replacing the module, so there is no need to write to the ROM every time editing is completed, and the program can be quickly programmed. development becomes possible. In addition, it is possible to connect RO to external equipment such as debug equipment.
There is no need to provide a RAM for storing programs in place of M, and there are no restrictions on the selection of debug equipment.

Furthermore, unlike the case where the program is stored in the RAM of an external device such as a debug device, the program exists in the exact same image location (address) as the ROM, so operations such as setting the debug device are simplified.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to easily edit and rewrite the program information to be stored in the ROM.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a schematic hardware configuration of a numerical control device that is an embodiment of the present invention. Microprocessor RAM Peripheral IC Socket Data Bus Address Bus-ROM Module OM RAM Module A M 1 1

Claims (1)

[Claims] (1) In a processor system that is entirely controlled by a processor that executes according to a program in a ROM, the ROM module includes a plurality of ROMs mounted on a first printed board; have the same storage capacity and the RO
A RAM module configured of a plurality of RAMs mounted on a second printed board so as to have input/output terminals compatible with the M module; and a RAM module connected to the bus of the processor system and connected to the ROM
A processor system comprising: a module; and a socket configured to hold one of the RAM modules.