JPH0635694A - Microprogram running stoppage controller and method - Google Patents

Abstract

PURPOSE:To provide a microprogram running stoppage control whose generality is high by which the running of a microprogram can be stopped based on a condition which can be arbitrarily set and changed including the case that reading or writing addresses beforehand set for a main storage are coincided. CONSTITUTION:Plural microprogram running stopping conditions are arbitrarity aet by registers 3-6, a code corresponding to the desired microprogram running stopping condition is set in the function code of a program instruction word, the microprogram running stopping condition corresponding to the set code is selected through a microprogram running stopping instruction register 7 by selector 8, and a microprogram running stopping request 10 is outputted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to control of a microprogram, and more particularly to a control device and method for stopping the running of the microprogram by controlling the microprogram.

[0002]

2. Description of the Related Art Generally, microprogram control is
Access (read or write) a pre-specified address in the main memory where software instructions and data are stored to facilitate debugging of micro programs
It has a function of temporarily stopping the execution of the microprogram when it does.

That is, conventionally, as a micro-program running stop system as described above, for example, one shown in FIG. 4 is known. In FIG. 4, 1 is a main memory accessed by the microprogram, 3 is a read address register for storing a read address of the main memory 1, 4 is a write address register for storing a write address of the main memory 1, and 24 is a read or write address. Is a comparison address register for storing a comparison address to be compared with, 25 is a comparator for comparing the read address or write address with the comparison address, and 26 is a microprogram running stop request generated as a result of the comparison.

Next, the operation of the microprogram running stop function shown in FIG. 4 will be described with reference to FIG. First, before starting the running of the microprogram, the address of the main memory 1 in which the temporary stop of the running of the microprogram is desired is stored in the comparison address register 24 in advance. Then, when the running of the microprogram is started (block 201 in FIG. 5), the microprogram sequentially runs and executes its contents (block 203). Whenever the main memory 1 is read or written, the process proceeds to block 205 and the user Check whether there is a request to stop the microprogram from.

If there is a stop request, the microprogram is stopped (block 209), and if there is no stop request, the read or write address, that is, the contents of the read address register 3 or the write address register 4 is sent to the comparator. In the comparator 25, the comparison address sent from the comparison address register 24 is compared (block 107). As a result of the comparison, if the read address or the write address and the comparison address match, the comparator outputs the microprogram running stop request 26, at which point the running of the microprogram is temporarily stopped (block 209), and the read address or the write address is written. If the address and the comparison address do not match, then the program returns to running the microprogram (block 203).

[0006]

However, in the conventional micro program running stop method as described above, the running of the micro program is performed only when the preset comparison address and the address for accessing the main memory match. There is a problem in that the stop is limited to a certain case, and the versatility is extremely low.

The present invention has been made in order to solve the above problems, and in addition to the case of matching the addresses for accessing the main memory 1 as described above, the micro program can be operated under various other conditions. An object of the present invention is to provide a highly versatile microprogram travel stop control capable of stopping travel.

[0008]

In order to solve the above-mentioned problems, the present invention solves the above-mentioned problems when a main memory is read or written, a machine check or a program check is performed, and a plurality of arbitrary microprograms are used. The traveling stop condition is set in each register, one of the codes corresponding to the microprogram traveling stop condition is arbitrarily set in the function code of the program command word, and the arbitrarily set code is executed by executing the program command word. The micro program running stop command register is stored, and the micro program running stop condition is selected by a selector based on the stored code, and the running of the micro program is stopped under the selected condition. It is a thing.

[0009]

According to the present invention, a plurality of micro program running stop conditions can be set and the micro program running stop conditions can be selected by a program command. Therefore, a plurality of micro program running stop conditions can be easily set. It can be set and changed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a block diagram showing a microprogram running stop control device, and FIG. 2 is a diagram showing program command words. In FIG. 1, the main memory 1, the read address register 3, and the write address register 4 are the same as the conventional ones, and 5 is a machine check factor register for storing a machine check code, and 6 is a program check code. The program check factor register 7 is a micro program running stop instruction register for setting a micro program running stop condition designated by the function code 13 of the program command word.

Further, 8 is a micro program running stop instruction register 7, and registers 3, 4, 5, 6 for storing micro program running stopping conditions in accordance with a request.
Is connected, and a selector for selecting a microprogram running stop condition from any one of the registers 3, 4, 5 and 6 based on the contents of the microprogram running stop command register 7, and 9 is a microprogram running stop command register 7
And a comparator which is connected to the read address register 3 or the write address register 4 via the selector 8 and compares the contents of the microprogram run stop instruction register 7 with the contents of the read or write address registers 3, 4.
Reference numeral 10 is a microprogram running stop request which is an output from the selector 8 or the comparator 9. In addition, in FIG.
Reference numeral 11 is a program instruction word, 12 is its instruction code, and 13 is its function code.

First, a desired microprogram running stop condition is set in each register. In this embodiment, the reading and writing of a pre-specified address in the main memory 1 and the generation of a machine check request and a program check request are set as micro program running stop conditions. However, needless to say, not only that but also any desired condition can be set.

Next, a code corresponding to each of the above microprogram running stop conditions is set in the function code 13 of the program command word 11 shown in FIG. This function code 13 can be arbitrarily set and changed.

By executing the program command word 11, the micro program running stop condition corresponding to the function code 13 is stored in the micro program running stop command register 7. Next, as in the case of the conventional example described above,
Each time the main memory 1 is read or written while the microprogram is running, its address is read out by the read address register 3
Alternatively, it is stored in the write address register 4. When the machine check factor or program check factor set in this embodiment occurs, the code is stored in the corresponding register 5 or 6.

The selector 8 receives a micro program traveling stop condition from the micro program traveling stop instruction register 7 and selects the condition. If the micro-program running stop condition matches the read address or the write address of the main memory 1, the content (read or write address) of the corresponding register is sent to the comparator 9. The comparator 9 compares the contents of each address register 3 or 4 with the contents (stop address) of the microprogram running stop instruction register 7. When the stop address matches the read or write address, the microprogram running stop request 10 is output from the output of the comparator 9 to stop the running of the microprogram.

If the microprogram running stop condition received from the microprogram running stop command register 7 by the selector 8 is a machine check request or a program check request, the selector 8 does not use the comparator 9 but the corresponding microprogram. Based on the occurrence of the traveling stop condition, the microprogram traveling stop request 10 is output to stop the traveling of the microprogram.

Next, the operation method of the micro program running stop control according to the present embodiment will be described with reference to the flow chart of FIG. First, as in the above embodiment, when the running of the microprogram is started (block 101), the microprogram sequentially runs and executes the operation based on the code (block 103). When the micro program is running, if there is an access such as reading or writing to the main memory 1, a request for a machine check or a program check, or a micro program stop request from the user, the process proceeds to block 105. If there is a microprogram stop request from the user, the process proceeds to block 111 to immediately stop the progress of the microprogram.

In block 105, if there is no microprogram stop request from the user, block 1
In step 07, it is checked whether or not the micro program running stop command has been executed. If not, the normal micro program running is resumed (block 103). In block 107, if the micro program running stop command has been executed, the process proceeds to block 109 to select the micro program running stop condition. If the micro program running stop condition is met, block 111
If the condition is not met, the process returns to block 103 to continue the microprogram running.

In the above embodiment, only the running stop of the micro program is shown, but at the same time, a function of storing and displaying the micro trace up to that point may be provided, or a combination with other functions may be provided. Is also free.

[0020]

As is apparent from the above description, according to the present invention, it is possible to set a plurality of micro program running stop conditions and to select each micro program running stop condition by a program command. It is possible to efficiently perform debugging by enabling highly versatile micro program running stop control in which a plurality of micro program running stopping conditions can be set and changed.

[Brief description of drawings]

FIG. 1 is a block diagram showing a micro program running stop control according to an embodiment of the present invention.

FIG. 2 is a schematic explanatory view showing program command words used in the present invention.

FIG. 3 is a flowchart showing a method for stopping running of a micro program according to an embodiment of the present invention.

FIG. 4 is a block diagram showing a conventional micro program running stop control.

FIG. 5 is a flow chart showing a conventional microprogram running stop control method.

[Explanation of symbols]

 1 Main Memory 3 Read Address Register 4 Write Address Register 5 Machine Check Factor Register 6 Program Check Factor Register 7 Micro Program Run Stop Command Register 8 Selector 9 Comparator 10 Micro Program Run Stop Request 11 Program Command Word 12 Command Code 13 Function Code

Claims (2)

[Claims] 1. A plurality of stop condition registers for setting a program run stop condition, and a microprogram run stop command register for storing the code by running a program command word in which a code corresponding to the program run stop condition is arbitrarily set. And a selector for selecting the stop condition register based on a code stored in the micro program run stop instruction register, and the running of the micro program is stopped under the selected condition. Stop control device. 2. A plurality of arbitrary microprogram running stop conditions are set, and one of the codes corresponding to the microprogram running stop conditions is arbitrarily set in the function code of the program command word, and based on the arbitrarily set codes. A microprogram running stop control method, characterized in that the microprogram running stop condition is selected and running of the microprogram is stopped under the selected condition.