JPS59231651A - Microprogram control type data processor - Google Patents

Abstract

PURPOSE:To perform multifunctional data processing by loading automatically a microprogram different in function from an external storage device to a writable control storage device. CONSTITUTION:A microprogram initial loader 26 refers to the contents of a flag register 27 when a power source is turned on or when a system is started, and a function microprogram I is loaded from the external storage device 21 to the writable control storage device WCS25 through a signal line 28 and executed. When a function microprogram II is required after said operation, the program I on the WCS25 sets a flag for determining the loading of the program II in a flag register 27, starting the initial loader 26. The initial loader 26 refers to the flag register 27 to load the program II to the WCS25.

Description

Detailed Description of the Invention [Technical Field of the Invention] The present invention provides a writable control storage device (WO2: Wr.
This invention relates to a microprogram-controlled data processing device for heading.

[Prior Art: 1] As a conventional microprogram-controlled data processing device of this type, there has been a butterfly, as shown in FIG.

FIG. 1 is a general configuration diagram showing a conventional microprogram control frame data processing device. In the above, 1 is an external storage device for storing microprograms, 2 is a functional microprogram of the data processing device in the external storage device 1, and 3F
i writable control storage device (WO2), 411j microprogram initial loader, 5t; writable control storage device 1ffi (WO2) 3 and external storage device 1
and a control path signal line for the 6II-i external storage device 1.

Next, the operation shown in FIG. 1 will be explained. First, when the power is turned on or the system starts up, the microprogram initial loader 4 is activated and the external storage device 1 is activated.
, the function microprogram 2 automatically outputs the pass signal a.
5 is loaded into the writable control memory tVVc8)3. At this time, the external storage device 1 temporarily stores the storage size of the writable control storage device (WCE9>, a).

21. The microprogrammer of the control storage device (WO2) 3 which can be accessed from the external storage device 1 is loaded unless a situation such as restarting the system occurs. do not have.

Conventional macro/1 macro program control type data processing device 11
．． Since the is configured as described above, the storage capacity of the microprogram is limited by the storage capacity of the control storage device (WO2) 3 that can be inserted into the control memory. Therefore, when designing the microprogram, it is necessary to reduce the program size. The disadvantage was that it required some ingenuity, and it also had to be highly functional. In addition, if we want to realize multiple functions, the capacity of the writable control storage device (WO2) 3 must be increased, which inevitably increases the number of parts and reduces the implementation efficiency. There were drawbacks such as a total decrease in reliability.

[Summary of the invention]

This invention was made with the aim of eliminating the above-mentioned drawbacks of the conventional ones, and includes a microprogram initial loader ζ, which determines which microprogrammer to load from an external storage device into a writable control storage device. A flag register is provided to dynamically and automatically load a microprogram with a different function in the external storage device to the writable control storage device, and the writing is limited. The present invention provides a microprogram-controlled data processing device that enables multi-functional data processing with a control storage device capacity that is small.

[Embodiments of the invention]

Examples of the present invention will be described below. FIG. 2 is a schematic diagram showing a microprogram-controlled data processing device according to an embodiment of the present invention. In the figure, 21
22.23.24 is an external storage device storing a plurality of functional microprograms, and 24 is each functional microprogram (1) stored in the external storage device 21.
, (II) and (III), 25 is a writable control storage device (WO2), 26.

27 is a microprogram initial loader, and 27 is a writable control storage device (WO2) for any of the functional microprograms M) 22 to (In) 24 stored in the external storage device
) 25, and this flag register 27 is used for each function microprogram (1) 22 to (1).
) is set according to the execution contents of 24. 28 is a bus signal line connecting the removable control storage device (WO2) 25 and the external storage device 21t, and 29 is a control bus signal line for the external storage device 21.

Next, the operation shown in FIG. 2 will be explained. First, at the time of electrolytic erosion or system start-up, the flag register 27
is initially set, microprogram initial low f26t6, control storage device (WO2) into which function microprogram (1) 22 can be written from external storage device 2 by referring to the contents of this flag register 27.
25, a read command from the external storage device 21 is issued via the control bus signal line 29.

Upon receiving this command, the external storage device 21 loads onto the writable control storage device (WO2) 25 via the functional microprogrammer Th, (I) 22 tl-bus signal line 28. In this manner, the contents of the functional microprogram (1) 22 loaded onto the writable control storage device (WO2) 25 are sequentially executed to control the data processing device. Thus, the series of operations of the data processing device is completed, and the functional microprogram (1)
When the function 23 is required, the function microprogram (1
) 22, a flag determining the loading of the function i microprogram (II) 23 is set in the flag register 27, and the microprogram initial loader 26 is activated. Referring to the contents of the microprogram initial loader 26Il'i flag register 27, the function microprogram (1) 23 in the external storage device 21 is transferred to the above-mentioned function microprogram (1).
) The writable control storage device (WO2) 25 is loaded in the same manner as in case 22. As explained above, the statement simply sets a flag to the flag register 27 to indicate which of the functional microprograms (1) 22 to (III) 24 is to be loaded into the writable IT storage device (WO2) 25. A control storage device (WO2) 25 that can be written to from the external storage device 21 by simply setting the microprogram initial loader 26 and starting the microprogram initial loader 26.
As the functional microprogram is executed, it can be dynamically loaded.This enables a multifunctional microprogram-controlled data processing device with the limited capacity of the writable control storage device (WO2) 25. can.

In the above embodiment, a case has been described in which a flag register 27 is provided to set a flag indicating which functional microprogram is to be loaded from the external storage device 21 onto the writable control storage device (WO2) 25. Alternatively, a specific flag area may be covered with a gold film on the writable control storage device (WO2) 25, and the same effect as in the above embodiment can be obtained.

FIG. 3 is a diagram showing an operation mode in which programs having different τ taste functions are overlay loaded in the microprogram-controlled data processing device shown in FIGS. As shown in the figure, each functional microprogram (1) 33, (II) 34 and (I[
l) 35 is a writable control storage (WO2) 3
2 is clearly shown.

〔Effect of the invention〕

As explained above, this invention is provided with a microprogram initial loader and a flag register that determines which microprogram is to be loaded from an external storage device into a writable control storage device, so that microprograms can be written dynamically. Because it is structured so that it can be loaded onto a control storage device, it is easy to design a microprogram without being limited by the size of the microprogram.Moreover, it is possible to perform multifunctional data processing with the limited storage capacity of the writable control storage device. 6. It has the excellent effect of providing a microprogram-controlled data processing device that enables

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[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing a conventional microprogram-controlled data processing device, FIG. 2 is a schematic configuration diagram showing a microprogram-controlled data processing device according to an embodiment of the present invention, and FIG. 2 is a diagram showing an operation mode in which programs with different functions are overlay loaded in the microprogram-controlled data processing device of FIG. 2. FIG. In the figure, 1, 21, 31...external storage device, 2.
22.23,24,33,34,35...Functional microprogram, 3,25.32...Writable control storage device (WO2), 4.26...Microprogram initial loader, 5.28 ... bus signal line, 6.
29...Control bus signal line, 27...Flag register. Agent Masuo Oiwa Figure 1 Figure 2

Claims (1)

[Claims] A microprogram initial loader is provided with a flag register for determining which microprogram is to be loaded from the external storage device into the writable control storage device, and the microprograms with different functions in the external storage device are loaded into the writable control storage device. 1. A microprogram-controlled data processing device having a function of dynamically and automatically loading a control storage device.