JPH024007B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to the activation direction of a microprogram-controlled processing device that selects and implements one of a plurality of functions or characteristics.

[Prior art]

BACKGROUND ART Conventionally, a startup method as shown in FIG. 1 has been used in a microprogram control processing device that selects and implements one of a plurality of functions or characteristics. In the example shown in FIG. 1, there are four types of functions or characteristics that can be selected: micro program start 1, initial setting section 2, control data reading section 3, control data discriminating section 4, parameter setting micro program 5, 6, 7, 8 and processing micro programs 9, 10, 11, 12.

In such a configuration, first, the initial setting section 2 initializes the registers and flags, and then the control data reading section 3 reads the control data into the internal register. The read control data is discriminated by the control data discriminator 4, and according to the discrimination result, the jump table in the control data discriminator 4 is referred to, and one of the parameter setting micro programs 5, 6, 7, and 8 is executed. The jump destination is specified. Then, by any one of the selected parameter setting microprograms 5, 6, 7, and 8, all parameters for realizing the selected function or characteristic are set in the data memory.

Each parameter setting micro program 5,
Processing micro programs 9, 10, 11, and 12 are prepared next to 6, 7, and 8, and each parameter setting micro program and processing micro program are paired, and one of the processing micro programs is executed. The control data implements selected functions or characteristics.

However, in the case of the conventional example shown in Fig. 1,
Each parameter setting micro program needs to set all parameters, making the software redundant, and since processing micro programs are prepared separately, the software becomes even more redundant. There is. Even if the processing microprograms are shared and unified, the redundancy of the parameter setting microprograms remains, making it impossible to efficiently start up the microprogram control processing device. To solve this drawback, a detection circuit is provided that uses hardware to detect control data for selecting the desired function or characteristic, and the jump table is accessed by the detection circuit to specify the jump destination. A method has been proposed in which a parameter setting micro program and a processing micro program are selected and executed (Japanese Patent Application No. 53-133438).
(Japanese Patent Publication No. 58-24808)) However, this method requires the provision of a detection circuit, which has the disadvantage of requiring redundant hardware.

[Object and structure of the invention]

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a method for starting a microprogram-controlled processing device without making hardware and software redundant.

In order to achieve this purpose, this invention
The control data for selecting the desired function or characteristic to be realized is divided into several data blocks, each data block is sequentially determined, and according to the determination results, the parameters are divided into several parameter groups. Each time, an operation of setting data memory or an operation of branching according to the determination result is sequentially executed, and finally one of the processing microprograms is executed. Hereinafter, the present invention will be explained in detail using drawings showing embodiments.

〔Example〕

FIG. 2 is a flow chart showing one embodiment of the present invention. In the figure, 13 is the start of the micro program, 14 is the initial setting section, 15 is the control data reading section, 16, 22 is the parameter selection control data discrimination section, 19, 23 is the branch selection control data discrimination section, 17, 18, 20, 21,
24, 25, 26, and 27 are parameter setting micro programs, and 28, 29, and 30 are processing micro programs. In this embodiment, the number of data blocks of control data is 3, and the number of functions that can be selected and implemented is 8 types.

First, the initial setting section 14 is executed to initialize registers, flags, and common part data memory. Next, in the control data reading unit 15, the program counter is controlled to be in a writing wait state until the control data is written, and the process of reading the control data into the internal register is performed. The read control data consists of three data blocks, and the first data block is determined by the parameter selection control data determining section 16, and is selected by either the parameter setting microprogram 17 or 18 according to the determination result. is selected. Then, the first parameter group is set in the data memory by the selected parameter setting microprogram 17 or 18. Both parameter setting micro programs 17 and 18 are then connected to a branch selection control data determining section 19. The branch selection control data determining section 19 determines the second data block of the control data, and branches to the branch route 31 or 32 according to the result of the determination.

In the branch route 31, the second parameter group is set in the data memory by the parameter setting micro program 20, and then the third data block is determined by the parameter selection control data determining section 22. Depending on the determination result, either the parameter setting microprogram 24 or 25 is selected. Selected parameter setting micro program 24 or 25
The third set of parameters is set in the data memory by the processing microprogram 28.
is executed. On the other hand, in the branch route 32, the second parameter group is set in the data memory by the parameter setting micro program 21, and then the third data block is set by the branch selection control data discriminator 23. It is determined, and a branch is made to branch route 33 or 34 according to the determination result. In the branch route 33, the third parameter group is set in the data memory by the parameter setting micro program 26, and finally the processing micro program 29 is executed. Further, in the branch route 34, the third parameter group is set in the data memory by the parameter setting micro program 27, and finally the processing micro program 30 is executed. As described above, the parameter setting micro programs 17, 18,
One of the eight types of combinations of the processing microprograms 20, 21, 24, 25, 26, 27 and the processing microprograms 28, 29, 30 is selected according to the control data, and one of the eight types of functions or characteristics is realized. .

〔Effect of the invention〕

This invention divides control data for selecting functions or characteristics to be realized into several data blocks, sequentially discriminates each data block, and divides control data into several parameter groups according to the discrimination results. By sequentially executing the operation of setting separated parameters in the data memory for each parameter group and the operation of branching according to the determination result, and finally executing one of several processing micro programs. This has the effect that starting a microprogram-controlled processing device that can selectively implement one of a plurality of functions or characteristics can be efficiently performed with less software and hardware.

[Brief explanation of drawings]

FIG. 1 is a flowchart showing an example of a conventional method for starting a microprogram control processing device, and FIG. 2 is a flowchart showing an embodiment of a method for starting a microprogram control processing device according to the present invention. 1, 13... Start of micro program, 2, 14... Initial setting section, 3, 15... Control data reading section, 4, 16, 19, 22, 23
...Discrimination unit, 5, 6, 7, 8, 17, 18, 2
0, 21, 24, 25, 26, 27...parameter setting microprogram, 9, 10, 11, 1
2, 28, 29, 30...processing microprogram.

Claims (1)

[Claims] 1 One or more processing microprograms and a group of parameters whose functions or characteristics change depending on the parameter values written in data memory.
In a micro-program control processing device consisting of one or more parameter setting micro programs set in memory, each data block consists of one or more data blocks containing control data having parameter group setting information and branch information. After the control data is written, the control data is determined in units of data blocks, and according to the determination results, a parameter setting micro program is selected and executed to set the parameter group in the data memory. Select and realize one of multiple functions or characteristics by sequentially performing branching operations as many as the number of data blocks of control data, and executing one of the processing microprograms at the end of the branch destination. A method for starting a micro program control processing device characterized by: