JPS62134733A - Control system for microprogram trace of communication equipment - Google Patents

Abstract

PURPOSE:To offer easily only a microprogram executing locus which is required by an analyzer, by executing a control for starting a store of an executing locus of a microprogram, when the number of times of an instruction processing has reached a designated number of times. CONSTITUTION:Before executing an issue of an instruction, the number of times of an instruction processing (n) before starting a store of a microprogram executing locus is set to a register 30 which is provided on a communication control device 6, by using a maintenance supporting device 5, and also a switch of a microprogram store area 20 is set to off so that the executing locus is not stored. (n) is a positive integer except '0'. When the communication control device 6 receives the instruction, the communication control device 6 executes the instruction and executes the processing in accordance with the contents which are stored in the microprogram store area 20, under a control of a microprogram execution controlling circuit 10.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a communication control device that processes and executes microprograms, and particularly relates to a stack system for microprogram execution trajectories.

(Prior Art) Conventionally, stack control of the microprogram execution locus in this type of communication control device could not be performed while the stack start/end instruction Z microprogram was running.

(Problems to be Solved by the Invention) In the conventional microprogram execution locus stack control method described above, the execution locus of the microprogram is stacked, or the execution locus of the r microprogram is not stacked. The microprogram l will run under any of the following environments, and the execution locus of the r microprogram will be stacked. When a microprogram is run under an environment such as ``1'', there is a drawback that all microprogram execution trajectories are stacked from the time the microprogram starts running until the time it stops running.

An object of the present invention is to stack the execution trajectory of a microprogram under the control of the microprogram, control the start of stacking the execution trajectory of the microprogram, and stack the execution trajectory from a host device to which a communication control device is connected. When the number of commands processed by the communication control device matches the stack start count of the execution trajectory, the above-mentioned drawback χ is eliminated by starting to store the execution trajectory of the microprogram, and the execution trajectory of unnecessary microprograms is eliminated. An object of the present invention is to provide a microprogram trace control method for a communication control device configured to prevent stacking.

(Means for Solving Problem χ) The microprogram trace collateral system of the communication device according to the present invention is constructed by including a storage means, a register, and a microprogram execution control means.

The storage means is for storing the execution trajectory χ of the microprogram.

The register is the stack start Y f! of the microprogram execution trajectory. It is used to store and count the number of instruction processings in order to control tlJ.

The microprogram execution control means is configured to set a predetermined count value given to the stack start 7 of the execution locus, and when the number of instruction processing times matches the predetermined count value, the microprogram execution locus is stored in the storage means. It is.

(Actual male side) Next, embodiments of the present invention will be described with reference to drawing χ.

FIG. 1 is an embodiment showing the configuration of a child computer system including a communication control device 11 related to the present invention, which includes a central processing unit 1, an input/output device group 7, and a central processing unit F[]. data transfer devices 2 to 4 placed between the device and other devices;
It is composed of a maintenance support vehicle 5 and a communication control device 6.

FIG. 2 is a block diagram showing an embodiment of a portion of the communication control device 6. In FIG. 2, IO is a microprogram execution control circuit, 20 is a storage area for a microprogram that is controlled by the communication control device 6, and 30 is a register. The microprogram execution control circuit 10 executes the communication control device 6's own microprogram! '
IIJ 1111. Microprogram storage area 2
0 is provided in a storage circuit (not shown) inside the communication control device i6. The register 10 stores the number of times instructions are processed from the central processing unit 1 connected to the pass control device 6 until execution of the microprogram execution trajectory stack is started.

FIG. 3 is a flowchart illustrating the execution of the communication control device microprogram trace control method according to the present invention. In FIG. 3, the communication control device 6 is the central processing bag wL1.
Each time one instruction from 1 is executed, the contents of the register 30 are subtracted by one, and when the contents are reset to 0, the microprogram execution locus starts stacking.

Next, an example of the operation of the present invention will be described in detail with reference to FIGS. 1 to 3.

The operation for storing the execution locus of the subsequent microprogram from the time when the first command is received from the central processing bag 1 to the communication control station 6 is as follows. Before issuing and executing a command, use the maintenance support device f15 to check the communication control device fI.
The microprogram execution trajectory is stored in the Vh register 30 at t, 6! The number of times n7 of command processing until the start is set, and the switch of the microprogram storage area 20 is set to OFF so that the execution locus is not stored. n is a positive integer other than 0.

When the communication control device 6 receives the command, the communication control device f! l
Under the control of the microprogram execution control circuit 10, L6 executes instructions according to the contents stored in the microprogram storage area 20 to perform process 7. At this time, the microprogram execution control circuit 10 checks the switch 7 for storing the execution locus inside the microprogram storage g20, and when the microprogram execution locus storage switch is turned on, the executed microprogram i+h by referring to the routine stored at the execution address inside the microprogram storage area 20 that is the same as the address
The i11th data is then stored in another storage circuit inside the communication control device 6.

Now, the communication control device 6 is connected to the microprogram storage area 2.
The contents of the register 30 executed by the internal instruction processing routine 1004 are checked in processing step 110.

When the contents of the register 30 are not 0, the next process 120
Go to register l.

In processing step 130, it is checked whether the content of is 0 or not. If the contents of the register 10 are not θ, the process proceeds to step 140. In processing step 120, only one content is subtracted from the content of register 30.

Further, the process proceeds to the next processing step 130, where the register 30
A determination 1 is made as to whether the content of has become 0 or not. As a result of the judgment,
When the contents of register 3° are 0, the process proceeds to the next processing step 140, and when it is not 0, the process proceeds to process step 140i.
Skip and proceed to processing of the next microprogram.

In processing step 140, the microprogram execution locus storage switch in the microprogram storage area 20 is turned on and control χ is passed to the next process. From this point on, since the execution locus storage switch is in the on state, the execution locus of the microprogram is stored as described above.

An embodiment of the present invention has been described above with reference to the drawings. Regarding the microprogram execution trajectory storage function, it is extremely easy to apply the present invention to a communication control device in which "enable" or "disable" can be specified by a panel switch provided in the device. be.

(Effects of the Invention) As explained above, the present invention requires an analyst to store the execution trajectory of a microprogram and perform control to start when the number of Z command processing reaches a specified number of times. This has the advantage that only the microprogram execution trajectory can be easily provided.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a seventh embodiment of a Taneko calculation system including a communication control device related to the present invention. FIG. 2 is a block diagram showing a detailed example of the communication control device shown in FIG. 1. FIG. 3 shows the microprogram trace control method of the communication control device according to the present invention'&! FIG. 1...Central processing unit 2-4...Data transfer device 5...Maintenance support device! L 6...Communication control device 7
...Input/output device group lO...Microprogram execution control circuit 20...
Microprogram storage area 3θ...Register Patent 11:1 IIJ 4 people NEC Corporation agent
Patent Attorney Inoro Renban 1 Illustration 28

Claims (1)

[Claims] a storage means for stacking the execution trajectory of the microprogram; a register for storing and counting the number of instruction processings to control the stacking start of the execution trajectory of the microprogram; and a predetermined register for giving the stacking start of the execution trajectory. and microprogram execution control means for setting a count value and storing the execution locus of the microprogram in the storage means when the number of instruction processing times matches the predetermined count value. Microprogram trace control method for control equipment.