JPS63133236A - System for detecting coincidence of microprogram address - Google Patents

Abstract

PURPOSE:To ensure continuous program operations by detecting the coincidence of addresses after adding the conditions to decide whether the executing addresses of a program are kept within a prescribed range or not. CONSTITUTION:A program counter intra-range check means 3 checks whether the value of a program counter 1 is kept or not within a range between the upper and lower limit levels shown by a program counter range register 2. If so, '1' is outputted to a signal line 9. While a microprogram address coincidence detecting means 6 compares the value of a microprogram counter 4 with the contents of a microprogram address coincidence designating register 5. Then '1' is outputted to a signal line 10 when the coincidence is obtained from said comparison. A condition deciding means 7 outputs '1' to a signal line 11 when the inputs of both lines 9 and 10 are equal to '1'. Receiving the outputted '1', a microprogram address coincidence informing means 8 informs the coincidence of addresses. In such a way, the continuous program operations are secured.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a microprogram address match detection method, and more particularly to a microprogram address match detection method for a processing unit implemented using a microprogram method.

BACKGROUND TECHNOLOGY Conventionally, this type of microprogram address match detection method uses a method in which the value of a microprogram counter that holds the execution address of a microprogram matches the contents stored in a microprogram address match designation register, which is a single condition. Sometimes there is a method of notifying a microprogram address match.

In such a conventional microprogram address match detection method, FW used at multiple locations in a program
If you want to stop a microprogram only when the (firstware) function is used at a certain point in the program, you can specify the microprogram address you want to stop at the beginning of the program. If the FWI function is used at a certain point before the FWI function is used at the target point, a microprogram address match will be detected, so the program will stop at the beginning of the target point in the program. The disadvantage is that the microprogram address must be matched and then a microprogram address matching instruction must be issued.

Furthermore, once the program is stopped, the continuity of the program is lost, and there is a drawback that normally the operation in which the abnormality has occurred cannot be guaranteed.

Purpose of the Invention The present invention has been made to eliminate the drawbacks of the conventional ones as described above, and is capable of guaranteeing the continuity of program operations and ensuring microprogram address matching under the same conditions as when an abnormality occurs. The purpose of this invention is to provide a microprogram address match detection method that can detect and notify.

Structure of the Invention The microprogram address match detection method according to the present invention is a microprogram address match detection method having a match detection means for detecting a match between a microprogram execution address and a predetermined address, the method comprising:
Range detection means is provided for detecting whether an execution address of a program consisting of a plurality of microprograms is within a predetermined range between an upper limit value and a lower limit value of execution addresses of the program, and the range detection means detects whether the execution address of the program When it is detected that the execution address of the program is within the range, and the coincidence detection means detects that the execution address of the microprogram matches the predetermined address, it is notified that the execution address of the microprogram matches. It is characterized by being made to do.

Embodiment Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention. In the figure, one embodiment of the present invention includes a program counter 1 that holds a program execution address, a program counter range register 2 that stores an upper limit value and a lower limit value of the program execution address, and a program counter range check means. 3, a microprogram counter 4 that holds the execution address of the microprogram, a microprogram address match designation register 5, a microprogram address match detection means 6, a condition determination means 7, and a microprogram address match notification means 8. It is configured.

A program counter within range check means 3 which receives the output of the program counter 1 and the output of the program counter range register 2 as inputs determines whether the value of the program counter 1 is within the range between the upper limit value and the lower limit value indicated by the program counter range register 2. If the value of program counter 1 is within the range, output 1'' to signal line 9,
If it is not within the range, 0'' is output to the signal line 9.

On the other hand, a microprogram address match detection means 6 which receives the output J of the microprogram counter 4 and the output of the microprogram address match designation register 5 detects the value of the microprogram counter 4 and the contents of the microprogram address match designation register 5. If the comparison results match, "1" is output to the signal line 10, and if they do not match, "0" is output to the signal line 10.

Next, the condition determining means 7 which receives the signal lines 9 and 10 as inputs outputs 1° to the signal line 11 if the inputs of the signal lines 9 and 10 are both 1°'.
'', and if the inputs of signal lines 9 and 10 are both not 01'' (both O''', or either one is 0'')
Outputs 1101+ to signal line 11.

The microprogram address match notification means 8 is connected to the signal line 1
If 1 is “1”, “1” is output to signal line 12 to indicate a microprogram address match notification, and signal line 1
1 outputs "O" to the signal line 12 in order to acknowledge the failure of the microprogram address match notification, thereby completing the +3+ operation.

That is, if the execution address of Progera t\ is within the range between the J: limit value and the lower limit value stored in the program counter range register 2, and the execution address of the microprogram is different from the contents of the microprogram address match specification register 5. Only when there is a match, a notification is sent that the microprogram address matches the execution address of this microprogram.

In this way, the matching of microprogram addresses is checked by adding the condition of whether the execution address of the program is within the range of the predetermined upper and lower limits to the conditions of the microprogram address match notification. By doing this, it is possible to detect a microprogram address match without interrupting the program being worked on, which means that the continuity of program operation can be guaranteed, and the conditions are the same as when an error occurs. Under , the microprogram address match can be detected and notified.

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, as described above, it is checked whether the execution address of a program consisting of a plurality of microprograms is within a predetermined upper and lower limit range of program execution addresses. By checking whether the execution address of the microprogram matches a predetermined address, the continuity of program operation can be guaranteed without being interrupted midway.
This has the advantage that microprogram address matching can be detected and notified under the same conditions as when an abnormality occurs.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention. Explanation of symbols of main parts 1...Program counter 2...Program counter range register 3...
...Program counter range check means 7...Condition judgment means

Claims (1)

[Claims] A microprogram address coincidence detection method comprising a coincidence detection means for detecting a coincidence between an execution address of a microprogram and a predetermined address, the execution address of a program consisting of a plurality of microprograms being a predetermined address. further comprising a range detection means for detecting whether the execution address of the program is within a range between an upper limit value and a lower limit value, the range detection means detecting that the execution address of the program is within the range;
and a microprogram address match detection method, characterized in that when the match detecting means detects that the execution address of the microprogram matches the predetermined address, a match of the execution address of the microprogram is notified. .