JPH02118849A - Simulation system for input output device - Google Patents

Abstract

PURPOSE:To attain the simulation of a CPU model including the relation with an input output device by returning the response for the input output instruction given from an external part to the external part considering the delaying time due to the mechanical action in the same way as an actual machine. CONSTITUTION:A CPU model description storing device 6, an input output device information storing device 7 and an external input output device 8 are connected to a simulator 5, and the internal part has an input output device simulation part 1, a CPU model simulation part 2, a memory 3 part and an input output processing part 4. The simulator 5 logically simulates a CPU model specified by the description stored in the device 6 at the simulation part 2, and simulates an input output instruction for the input output device issued from the CPU model based on input output device information stored in the device 7 at the simulation part 1. The CPU model is logically verified related to the input output device and the simulation result, etc., are outputted.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for simulating multiple types of input/output devices of different types, and in particular, a method for simulating a logical device model such as CP tJ with multiple types of input/output devices. The present invention relates to a simulation method for input/output devices suitable for simulation and verification in connection with the related art.

[Conventional technology]

Generally, as a simulation method for an electronic device, a method is known in which an electronic device model is created that describes in detail the internal configuration, nine functions, etc. of the electronic device, and this model is simulated. Simulations using such models are widely used in logic devices such as CPUs. However, among electronic devices, input/output devices such as floppy disk devices often have analog operations that involve mechanical operations, so it is extremely difficult to create a model for them. For this reason, conventionally, the human output 'AX itself has not been simulated.

[Problem to be solved by the invention]

By the way, at the design stage of a logic device such as a CPU, the logic is verified by performing logic simulation on the designed CPU model using a simulator. In this kind of logic verification, since the CPU is rarely used alone in actual systems, it is necessary to match the ink face with the input/output device connected to it, such as a floppy disk device, and to check the CPU model in relation to the input/output device. It is desirable to carry out logical simulations. However, as mentioned above, it has been difficult to simulate the input/output device itself, so the logic verification of the parts related to the input/output device has to be omitted or by using the actual input/output device (actual device). I had no choice but to do it.

The present invention has been made in view of these circumstances,
The purpose is to provide a simulation method for input/output devices that allows a logical device model such as a CPU to be simulated and verified in relation to a plurality of types of input/output devices.

[Means to solve the problem]

In order to achieve the above object, the input/output device simulation system of the present invention provides input/output device information that stores configuration information and virtual input/output data of each input/output device necessary for simulation of input/output instructions. storage means and input/output commands input from the outside, based on the configuration information and pseudohuman output data in the input/output device information storage means for the input/output device that is the target of this input/output command, during input/output operation. input/output device simulation means that performs simulation taking into account the delay time and outputs a response to the outside after a time determined by the delay time has elapsed.

[Effect]

In the input/output device simulation method of the present invention, the input/output device information storage means stores configuration information and virtual input/output data necessary for simulating input/output commands of a plurality of input/output devices, and When an input/output command is given, the input/output device simulation means takes into account the delay time during input/output operation based on the configuration information and virtual input/output data of the input/output device that is the target of the input/output command. An input/output command is simulated, and a response is output to the outside after a time determined by the delay time has elapsed.

〔Example〕

Next, embodiments of the present invention will be described in detail with reference to the drawings.

Fig. 1 shows the configuration of an embodiment of the input/output device simulation method of the present invention, and Fig. 2 shows an example of a system for performing logic simulation of a CPU model including the relationship with the input/output device. 5 is a simulator, and a CPU model description storage device 6. It is connected to the input/output device information storage device 7 and the external input/output device 8, and has an internal input/output device simulation section 1. CPU model simulation section 2. It has a memory section 3 and an input/output processing section 4. This simulator 5 logically simulates the CPU model defined by the description stored in the CPLI model description storage device 6 in the CPU model simulation section 2, and stores it in the input/output device information storage device 7 in the input/output device simulation section l. Based on the stored input/output device information, the input/output processing unit simulates input/output commands issued from the CPU model to multiple types of input/output devices, and performs logic verification on the CPU model in relation to the multiple input/output devices. It has a function to output simulation results etc. to the outside via 4.

Referring to FIG. 3, the input/output device information storage device 7 includes:
Input/output device information for each input/output device to be shimilated 70-1.70-2. ... is stored. Each input/output device information 70-1 etc. includes performance information S, input/output command to action content correspondence table T, including performance information S, input/output command to action content correspondence table T, and input/output command to action content correspondence table T. Configuration information for the output device is configured. Performance information S
For example, in the case of a floppy disk device, this is information such as the seek time, the waiting time for one revolution, and the data transfer rate. The input/output command vs. operation content correspondence table T is
This is a table that associates each input/output command issued from the model with what kind of operation it instructs, and also stores event report formants and the like. Pseudo input/output data D is data that is pseudo-outputted from the input/output device when an output request is made from the CPU model, and data that is pseudo-outputted from the input/output bag I to the CPU model when a manual request is made from the CPU model. This is the data to be given.

Referring to FIG. 1, the input/output device simulation section 1 of FIG. 2 includes a loading means 100. Input/output device configuration information storage means 101. Simulation target input/output device determination means 102. Simulation target input/output command string input means 1031 Person output command string storage means 104. I/O command extraction means 105, command interpretation means 106. Input processing related simulation means 107. Output processing related simulation means 1082 output instruction sequence processing completion determination means 109
, time calculation means 110 and event reporting means 111. Each means has the following functions.

・Loading means 100 When the simulator 5 shown in FIG. A function of storing the content correspondence table T) in the input/output device configuration information storage means 101 and storing the pseudo-human output data D included in the input/output device information in the memory section 3.

- Input/output device configuration information storage means 101 - Performance information i1s corresponding to each input/output device loaded by the code means 100 and input/output command versus operation content correspondence table T
Ability to hold.

・Simulation target input/output device determination means 10 When an input/output command is issued from the CPU model simulation unit 2 in FIG. 2, the input/output device to be simulated is determined based on the input/output command, ．． Input processing related simulation means 107. Output processing related simulation means 108 and event reporting means 111
In addition, the command interpreting means 106 and the like refer to the configuration information corresponding to the notified input/output device from the input/output device configuration information storage means 101. It performs a predetermined operation.

- Simulation target input/output instruction string input means 1 A function to input the input/output instruction string issued from the CPU model simulator 2 shown in FIG.

- Input/output instruction string storage means 104 A function to hold the input/output instruction string inputted by the simulation target input/output instruction string input means 103.

- Input/output command retrieval means 105 Function to retrieve input/output commands one by one from the input/output command string storage means 104.

・Command interpretation means 106 refers to the input/output command retrieved by the input/output command retrieval means 105 to the input/output command versus operation content correspondence table T corresponding to the current simulation target input/output device in the input/output device configuration information storage means 101 A function that separates commands related to human power and commands related to output.

- Input processing related simulation means 107 converts the input related commands passed from the command interpretation means 106 into the performance information S corresponding to the current simulation target input/output device in the input/output device configuration information storage means 101 and the correspondence between input/output commands and operation contents. While referring to Table T, perform a simulation taking into account the delay time during input operation, and adjust the memory unit 3 as necessary.
Note that the delay time information obtained during the simulation is notified to the time calculation means 110, and the processing status is notified to the event reporting means 111.

・Output processing-related simulator 10B The output-related commands passed from the command interpreter 106 are processed into the performance information S corresponding to the current simulation target input/output device in the input/output device configuration information storage means 101 and the input/output command pair operation. While referring to the content correspondence table T, perform a simulation taking into account the delay time during output operation, and if necessary, change the memory unit 3.
In addition, the delay time information obtained during the simulation is notified to the time calculation means 110, and the processing status is notified to the event reporting means 111.

- When one instruction is processed by the input/output instruction sequence processing end determination means 109, the human processing related simulation means 107 or the output processing related simulation means 108, unprocessed input/output instructions remain in the input/output instruction string storage means 104. The function determines whether or not there are any remaining input/output commands, and if there are any remaining, instructs the input/output command retrieval means 105 to retrieve the next input/output command, and if there are no remaining commands, the function activates the time calculation means 110.

- Time calculation means 110 Based on the delay time information notified from the human processing related simulation means 107 and the output processing related simulation means 108, the input/output command issued by the CPU model simulation unit 2 in FIG. The time at which the event report for the column should be output is determined and the time is sent to the event reporting means 111.
Ability to notify.

- Event reporting means 111 Creates an event report to be output to the CPU model simulation unit 2 based on the processing status notified from the human processing related simulation means 107 and the output processing related simulation means 108, and generates a time calculation means CPU model simulation unit 2 at the time notified from 11O.
Function to output to. The event report format is created in accordance with the event report format in the corresponding stone input/output command versus operation content correspondence table T of the input/output device configuration information storage means 101.

Next, the simulator 5 in FIG. 2 sets the system as shown in FIG. 4 as a simulation target system, and the CPU model simulation section 2 in FIG. Disk device 22. Terminal control device 23. Human output equipment consisting of other input/output devices 24.25! The input/output device simulation unit 1 shown in FIG.
The operation of the input/output device simulation section 1 will be described below assuming a case where the input/output device simulation section 1 performs a similar operation. The situation is (1
) The CPU 21 sends 5E to the floppy disk device 22.
Consider a case in which an EK command and a READ command are issued, and (2) a case in which a WRITE command and a READ command are issued to the terminal control device 23.

(1) When the CPU 21 issues a 5EEK command and a READ command to the floppy disk device 22 During such a simulation, the input/output device information storage device 7 contains the C
Performance information S, input/output command vs. operation content correspondence table T, and pseudo input/output data D necessary for simulating input/output commands issued from the PU 21 are stored. A command-to-action content correspondence table T is stored in the input/output device configuration information storage means 101, and pseudo-human output data D is stored in the memory section 3. An area 30 illustrated in the memory unit 3 in FIG. 1 is an area used during simulation of the Fronbi disk device 22, and includes a pseudo disk area 300 in which predetermined information is stored in a predetermined order. Pseudo input/output data D is stored therein. Further, area X is an area for storing the specified position of the 5EEK operation, and area Y is an area specified by the RE eight command.

When the CPU model simulation unit 2 of FIG. 2 that simulates the CPU 2 i specifies the floppy disk device 22 as the optical device that issues input/output instructions,
Siminilation target input/output device determination means 10 in FIG.
2, the simulation target is a floppy disk W2
2, and notifies the instruction interpreting means 106 etc. that the current simulation target input/output device is the floppy disk device 22.

Next, from the CPU model simulation section 2, 5EEK
When the command and the RE8 command are output in that order, the simulation target input/output command sequence human input means 103 inputs them and stores them in the input/output command sequence storage means 104.

Next, the input/output instruction retrieval means 105 retrieves the 5EEK instruction from the input/output instruction string storage means 104 and passes it to the instruction interpretation means 106.

The command interpretation means 106 includes the input/output device configuration information storage means 1
By referring to the input/output command vs. operation content correspondence table T corresponding to the floppy disk device 22 in 01,
The instruction passed from the input/output instruction fetching means l05 is 5E.
It determines that it is an EK command and notifies it to the output processing related simulation means 10B.

The output processing related simulation means 108 is a 5EEK
When a command is input, a simulation of the 5EEK command is executed by referring to the input/output command to operation content correspondence table T corresponding to the floppy disk device 22. That is, by determining what kind of operation content the 5EEK instruction corresponds to using the input/output command vs. operation content correspondence table T, the specified position of the 5EEK operation is obtained from various information in the 5EEK instruction. The delay time for the floppy disk device 22 is calculated based on the seek time information in the performance information S corresponding to the floppy disk device 22.

Then, after activating an internal timer to write the specified position of the 5EEK operation to the area The process is completed and control is passed to the input/output instruction sequence processing completion determination means 109.

The input/output instruction string processing end determining means 109 checks whether there are any unprocessed input/output instructions remaining in the input/output instruction string storage means 104, and since the REAb instruction remains, the input/output instruction fetching means 105 is started. In response, the input/output command retrieving means 105 retrieves the READ command and notifies the command interpreting means 106, and the command interpreting means 106 interprets this and passes the READ command to the input processing related simulation means 107.

When the input processing related simulation means 107 inputs the RE command, it generates performance information S corresponding to the floppy disk device 22 and a table T corresponding to input/output commands and operation contents.
The simulation related to READ is executed by referring to .

That is, what kind of operation content the READ command corresponds to is determined using the input/output command vs. operation content correspondence table T, and the RE
The delay time for reading data related to AD operation is calculated based on the data transfer speed information etc. in the performance information S corresponding to the floppy disk device 22. After the delay time has elapsed, an internal timer is activated to read data from the location in the pseudo disk area 300 indicated by the specified position of the 5EEK operation stored in area X, and the delay time information is sent to the time calculation means 110. Once notified, the process is terminated, and control is passed to the input/output instruction sequence process end determination means 109.

The input/output instruction string processing end determination means 109 checks again whether or not there are any unprocessed input/output instructions remaining in the input/output instruction string storage means 104, but in this case, since there are no unprocessed input/output instructions remaining, the time calculation means 110 calculates the time. instruct the calculation of

The time calculation means 110 includes the input processing related simulation means 107 and the output processing related simulation means 1.
Based on each delay time information input from 0B, the event reporting means 111 totals the time taken for the simulation.
calculates the time at which the event should be reported, and sends it to the event reporting means 11.
1 will be notified.

On the other hand, when the delay time related to the 5EEK instruction has elapsed, the input processing related simulation means 107 performs the operation related to the 5EEK instruction that was awaited above, that is, the 5EEK instruction.
An operation is performed to store the designated position of the operation in the data storage area X, and a status indicating the result is notified to the situation reporting means 111. Further, when the delay time related to the READ command has elapsed, the output processing related simulation means 108 performs the operation related to the READ command awaited above, that is, the data in the pseudo disk area 300 corresponding to the 5EEK specified position of the data storage area Perform the operation of writing to Y, and send the status indicating the result to the situation reporting means 11.
Notify 1.

The event reporting means 111 includes the input processing related simulation means 107 and the output processing related simulation means 1.
Upon receiving these statuses from 08 onwards, the event report is made to the CPU model simulation section 2 in FIG. 2 at the time notified from the time calculation means 110 according to the statuses.

By performing the above operations in the input/output device simulation unit 1, the CPU model simulation unit 2 performs the same operations as if the 5EEK command and the RE A and D commands were issued to the actual floppy disk device 22. It becomes possible to receive a response and to verify the logic of the part related to it.

(2) CPU 21 sends WRITE to terminal control device 23
When a command and a READ command are issued, in such a case, the input/output device information storage device 7 stores performance information necessary for the simulation of the input/output command issued from the CPU 21 to the terminal control device 23. S, input/output command vs. operation content correspondence table T and pseudo input/output data D
is stored, and when the simulator 5 is started, the performance information S and the input/output command versus operation content correspondence table T are stored in the input/output device configuration information storage means 101, and the pseudo input/output data D is stored in the memory section 3. ing. An area 31 illustrated in the memory unit 3 in FIG. 1 is an area used during simulation of the terminal control device 22, and includes output messages 310 and keyboard pseudo input data 311 in which predetermined information is stored in a predetermined order. is stored. Further, area Z is a data storage area designated by a READ command.

When the CPU model simulation unit 2 in FIG. 2, which simulates the CPU 21, specifies the terminal control device 23 as all destination devices for input/output instructions, the simulation target input/output device determining means 102 in FIG. determines that is the terminal control device 23,
The instruction interpretation means 106 and the like are notified of this fact.

Next, WRIT is sent from the CPU model simulation section 2.
When the E command and the READ command are output in that order, the simulation target input/output command string input means 103 inputs them and stores them in the input/output command string storage means 104.

Next, the input/output command retrieval means 105 retrieves the WRITE command from the input/output command string storage means 104 and passes it to the command interpretation means 106.

The command interpretation means 106 includes the input/output device configuration information storage means 1
By referring to the input/output command to operation content correspondence table T corresponding to the terminal control device 23 in 01, it is determined that the command passed from the input/output command retrieval means 105 is a WRITE command, and the command is output processed. The associated simulator 108 is notified.

The output processing related simulation means 108 is a WRIT
When the E command is input, the WR
Execute a simulation related to ITE instructions. That is, the output message 310 stored in the area 31 of the memory unit 3 is displayed on a predetermined terminal by determining what kind of operation content the WRITE command corresponds to using the human output command vs. operation content correspondence table T. Analyze what should be done. Then, the corresponding WRITE! , calculates the delay time required for the command, notifies the time calculation means 110 of this delay time information, and
After that delay time, send the output message to the terminal (e.g.
After activating an internal timer to output the data to the external input/output device 8 shown in the figure), the process is temporarily terminated and control is passed to the input/output instruction sequence processing completion determination means 109.

The input/output instruction string processing completion determining means 109 checks whether or not there are any unprocessed input/output instructions remaining in the input/output instruction string storage means 104. Since the READ instruction remains, the input/output instruction fetching means 105 is executed. to start. In response, the input/output command retrieving means 105 retrieves the READ command and notifies it to the command interpreting means 106, and the command interpreting means 106 interprets this and sends the READ command to the input processing related symbol 91 line means 107. hand over.

The input processing related similation means 107 is the READ
When a command is input, the REA is
A simulation related to the D instruction is executed. That is, R
What kind of operation content the EAD command corresponds to is determined using the input/output command vs. operation content correspondence table T, and the delay time for reading data related to the READ operation is determined as specified in the performance information S corresponding to the terminal control device 23. Calculate based on information. After the delay time has elapsed, an internal timer is activated to store predetermined data of the keyboard pseudo input data 311 in the area 31 in the data storage area Z, and the delay time information is notified to the time calculation means 110. The process is terminated once, and the control is transferred to the input/output instruction sequence processing completion determination means 109.
give it to

The input/output instruction string processing completion determination means 109 checks again whether or not there are any unprocessed input/output instructions remaining in the input/output instruction string storage means 104, but in cases 1 and 2, since there are no remaining input/output instructions, the time calculation means 110 to calculate the time.

The time calculation means 110 includes the input processing related simulation means 107 and the output processing related simulation means 1.
Based on each delay time information input from 08, the time taken for the simulation is totaled and the event reporting means 111
calculates the time at which the event should be reported, and sends it to the event reporting means 11.
1 will be notified.

On the other hand, when the delay time related to the WRITE command has elapsed, the output processing related simulation means 108 performs the operation related to the WRITE command that was awaited above, that is, the operation of displaying the output message on the terminal, and reports the status indicating the result. The means 111 is notified. Further, when the delay time related to the READ command has elapsed, the input processing related similiation means 107 performs the operation related to the READ command that was awaited above, that is, data storage?
Performs the operation of writing the keyboard virtual input data to the iI area Z, and reports the status indicating the result to the situation reporting means 111.
to notify.

The event reporting means 111 includes the human processing related simulation means 107 and the output processing related simulation means 1.
Upon receiving these statuses from 08 onwards, the event report is made to the CPU model simulation section 2 in FIG. 2 at the time notified from the time calculation means 110 according to the statuses.

By performing the above-described operations in the input/output device simulation section 1, the CPU model simulation section 2 performs the WRITE command on the actual terminal control device 23.
It becomes possible to receive the same response as when issuing a command and a READ command, and it becomes possible to verify the logic of the part related to it.

The above is the floppy disk device 22. Terminal control device 23
Although an example of operation during simulation has been described, input/output instructions for other types of input/output devices are similarly simulated.

〔Effect of the invention〕

As explained above, according to the input/output device simulation method of the present invention, a response to an input/output command given from the outside can be returned to the outside while taking into account the delay time caused by the mechanical operation similar to that of the actual device. Therefore, by using the present invention, it is possible to simulate the CPU model including the relationship with the input/output device. Furthermore, since the internal operation of the input/output device itself that is not required for the simulation of the CPU model is not simulated, there is no need to define the internal operation of the input/output device itself by model description or the like, and implementation is extremely easy. Furthermore, by storing configuration information and pseudo human output data necessary for simulating input/output commands of multiple types of input/output devices in the input/output device information storage means, simulation of multiple types of input/output devices is possible. , and by changing the storage information, it is also possible to change the input/output device to be shimilated.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the input/output device simulation method of the present invention, FIG. 2 is a diagram showing an example of a system for simulating a CPU model including the relationship with the input/output device, and FIG. FIG. 4 is a diagram showing an example of the contents of the input/output device information storage device 7, and FIG. 4 is a diagram showing an example of a target system simulated by the simulator of FIG. 2. In the figure, ! ...Input/output device simulation section 2...CPU
Model simulation section 3...Memory section 7...I/O device information storage device

Claims (1)

[Scope of Claims] Input/output device information storage means for storing configuration information and pseudo input/output data of each input/output device necessary for simulation of input/output instructions; Based on the configuration information and pseudo input/output data in the input/output device information storage means for the input/output device that is the target of the command, a simulation is performed taking into account the delay time during input/output operation, and the time elapsed determined by the delay time is calculated. 1. A simulation method for an input/output device, comprising input/output device simulation means for later outputting a response to the outside.