JPS6358560A - Data processing system - Google Patents

Abstract

PURPOSE:To attain a simple, compact and inexpensive data processor which is free from maintenance and control and has the reduced data reading time, by transferring the data on a working program stored in a fixed memory to a main memory before start of the processing and using said data for processing. CONSTITUTION:In case of a system rising a power supply is first applied and a CPU 1 is released from its reset state. The program processing is started at a prescribed address of a PROM 10. An initial program loader initializes a DMAC 9 to set it under a data transfer enable state and starts the DMAC 9. Then the DMAC 9 starts the transfer of data from a set address of an MROM 8 and stores the transferred data in a set address of a DRAM 7. Hereafter the data equivalent to the set length are transferred. When the transfer of data is through, a processing program is carried out and a circuit connecting action is started. Thus a program can be carried out just by loading the program stored in the MROM 8 to a main memory 11.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a data processing system applicable to a private branch exchange I (PBX) or a key telephone device.

(Conventional technology) FIG. 3 shows a conventional data processing system.

In the figure, 1 is a CPU that centrally controls the entire system.
, 2 is a memory circuit, 3 is a floppy disk controller (FCC), and 5 is a serial interface circuit (S
IO). These are interconnected by a bus 6. The memory circuit 2 includes PRO)l, DRAt(
The initial program loader used at system startup is stored in PRO)i, and the DRA
)1 is loaded with a system (for example, PBX) processing procedure program and used.

A floppy disk 4 is connected to the floppy disk controller 3, and the floppy disk 4 stores the above-mentioned processing procedure program. The floppy disk controller 3 controls the floppy disk 4 to read and write data. The serial interface circuit 5 is connected to each part of the system (PBX trunk circuit, switch circuit), and data transmission and reception control is performed via the serial interface circuit 5.

In the system configured as described above, when the system is started up by turning on the power, etc., the PR of the memory circuit 2 is
The initial program loader stored in OH is activated. Under the control of the initial program loader, the floppy controller 3 reads data of the processing procedure program from the floppy disk 4. The continued data is
The data is transferred to the DRAM of the memory circuit 2. After this, C.P.L.
ll controls each part based on a processing procedure program in the DRAM.

However, according to the above-mentioned system, the external storage device in which the program is stored before the system is started up includes mechanical components such as floppy disks, and is large and complicated, and moreover, compared to It was expensive. In addition, the mechanical components require complicated maintenance and maintenance. Another drawback is that it takes a lot of time to mechanically read the data.

(Problems to be Solved by the Invention) As mentioned above, according to conventional data processing systems, mechanical components are large and complex in the external storage device where programs are stored before the system is started up. ,
Problems often arise that they are expensive, require maintenance and maintenance, and take a lot of time to read data. The present invention was devised in view of the drawbacks of the conventional data processing systems, and its purpose is to provide an external storage device that is small, simple, inexpensive, requires no maintenance or maintenance, and has a relatively short data read time. An object of the present invention is to provide a data processing system having the following features.

[Structure of the Invention] (Means for Solving the Problems) The present invention includes a rewritable main memory and a CPU that processes data based on an operating program working in the main memory.
and a fixed storage memory storing an operating program including a scratch area necessary for the data processing, and transfers the data of the operating program in the fixed storage memory to the memory before starting the data processing. , a data processing system configured to be used during the above data processing.

(Function) According to the above configuration, since it is a fixed storage memory, it is smaller, simpler, lower-mounted, requires no maintenance, and can shorten the time for continuous data output compared to external storage devices including mechanical configurations.
Moreover, the operating program stored in the fixed storage memory has a scratch area, so that it can be loaded into the main memory and used as is.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. In FIG. 1, the same components as in FIG. 3 are given the same numbers and their explanations will be omitted.

11 indicates the main memory, PROHlo, DRA) 1
It consists of 7. An initial program loader is stored in PROHlo. DRAM7 has CPU1
Stores processing procedure programs used by. 8 is HR
O) indicates f. This) IROHB stores a system processing procedure program. The processing procedure program includes a scratch area, and the DRA
When loaded into the M7, it is executed as is and runs 1q. 9 indicates a direct memory access controller (DHAC). DHAC9 is under the control of the initial program loader in PROH10.
Transfer data of M8 program to DRA)17.

The operation of the system configured as described above at the time of system startup will be explained based on the flowchart shown in FIG.

First, the power is turned on and CPtJl is released from the reset state (12). PRO) 110 starts program processing (13), and the initial program loader D) initializes the IAc 9 to enable data transfer D) starts the IAc 9 (1)
4). Then, the DHAC 9 starts transferring data from the set address of the ROH 8, and stores the transferred data to the set address of the DRAM 7.15)
Data transfer for the length set below is performed (1
6). When the transfer is completed, the processing program is executed to start the line connection operation (11).

In this way, in this embodiment, a program including a scratch area necessary for importing and storing necessary data, such as a PBX or a key telephone device, is
Since it is stored in the ROFi8, the program can be executed simply by loading it into the main memo January 1. Moreover, since programs with scratch areas are not normally stored in ROM, programs in ROM become complicated considering the scratch area when loaded, but with the present invention, programs including the scratch area can be programmed. , it becomes a simple program.

[Effects of the Invention] As described above, according to the present invention, the device is small, simple, and inexpensive, requires no maintenance or maintenance, and can relatively shorten data read time.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention, and FIG. 2 is a block diagram of an embodiment of the present invention.
A flowchart for explaining the operation of one embodiment of the figure,
FIG. 3 is a block diagram of a conventional data processing system. 1...CPU 5...Serial interface circuit 6...Bus 7...DRAM 8...MROM 9...DMAC 10.FROM 11...Main memory agent Patent attorney Nori Chika Ken Shu Sanno - Figure 1 Figure 3 470゛・1''-71 Suf Figure 2

Claims (1)

[Claims] The main memory includes a rewritable main memory, a CPU that performs data processing based on an operating program in the main memory, and a fixed storage memory that stores an operating program including a scratch area necessary for the data processing. A data processing system characterized in that data of an operating program in the fixed storage memory is transferred to the memory before the start of the data processing, and is used during the data processing.