JPS62254244A - Information processor - Google Patents

Abstract

PURPOSE:To easily change and display the internal state of an information processor by adding a command register and a data register to a microprocessor together with a control signal line. CONSTITUTION:When the internal state of an information processor is changed, the display/change request signal is set at state '1' on a signal line 122. Thus the state of the ready signal is also set at '1' on a signal line 123. A register control part 2 supplies the register selection signal on a signal line 125 to a data register 12 and sets the R/W signal on a signal line 121 under a write state with the change data set the register 12 respectively. Then the part 2 selects a command register 11 and sets the R/W signal on the line 121 under a write state with the command to be changed set to the register 11. A control part 1 sets the ready signal at '0' to analyze the command and changes the contents of the register 12 based on the contents of the corresponding register or flag of the processor part to complete the processing.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a microprocessor for an information processing device, and more particularly to a method for changing/displaying the internal state of a microphone tube processor.

(Prior Art) Conventionally, displaying or changing the contents of the internal registers of a microprocessor has been done in a straightforward manner.That is, by using an interrupt function and using software instructions. The contents of the microprocessor's internal registers were displayed by saving the contents of the registers in memory and displaying them.

In addition, the saved contents can be changed and restored by software commands to completely change the saved contents. Fig. 3 is an explanatory diagram showing a method of changing/displaying the internal state in a microprocessor according to the prior art. In Fig. 3, 31 is a microprocessor, 32 is a memory, and 32
1 is the interrupt vector area, 322 is the work area, 32
3 is a display processing program storage area.

In FIG. 3, when υ display is performed by an external device, the contents ft of the vector area 321 are rewritten, the entry address of the display processing program 323 is set, and the interrupt signal on the signal line 310 is set to '1'. When the microprocessor 31 detects an interrupt, it accesses the interrupt vector area 21 and takes out the vector corresponding to the interrupt. Since the retrieved vector has been previously set at the entry address of the display processing program 323, when the display processing program is executed, the internal state of the microprocessor 31 is saved in the work area 322.

When changing the above contents, the contents saved in the work area 322 are changed, and the processing program 322 is changed.
The control (IIl) was passed to 3 to perform a restore operation, and the contents of the register were rewritten.

(Problems to be Solved by the Invention) As mentioned above, in the conventional information processing device, the method for displaying/changing internal registers is to execute an interrupt and expand and display the contents on the main memory using software instructions. Next, a program storage area for display/modification and a tth area for expanding the contents of internal registers are required on the main memory.Also, control is performed by interrupts. In order to trace register contents for each instruction, there is a disadvantage that a long processing time is required.Also, since the instructions used in the program are used, the optical There is also the disadvantage that the states that can be changed are limited to those that are visible to the program.An object of the present invention is to provide a request signal for switching the light display/change mode at the end of a command, and to instruct the light display/change operation. Store all the commands, detect the presence or absence of the mode switching signal at the end of the command, detect all the mode switching signals, and then use the above command to display the internal state of the processor or change the internal state. It is an object of the present invention to provide a hole information processing device which eliminates the above-mentioned drawbacks and is structured so that display/change does not have to be limited to what is visible to the program.

(Means for Solving All Problems) An information processing apparatus according to the present invention is configured to include a command register, a data register, and a control means.

The command register is for storing commands that instruct operations to display or change the internal state of the microprocessor.

The data register stores the internal state of the microprocessor to be displayed when the contents of the command register instructs display, and stores the internal state of the microprocessor to be changed when the contents of the command register instructs change. It is for storing everything.

The control means sets a command register and a data register in accordance with an instruction to display or change the internal state of the microprocessor, and controls the display to complete the operation.

(Example) The present invention will now be described with reference to one drawing.

No. 119 is a block diagram showing an embodiment of the information processing apparatus according to the present invention. In the 11th g, l is the controlling part,
Reference numeral 2 is a register control m section, 11 is a command register, 12 is a data register, 13 is a selector, 14 is a command flag, 15 is a cheater flag, and 16 and 17 are read buffers.

In the first step, a command from the outside is set in the command register 11, and data to be displayed/changed is set in the data register 12. The selector 13 selects all inputs of the data register 12. command flag 1
4 indicates that the command is set and A, and data flag 15 indicates that data is set.

The register 1117111 section 2 selects data to be sent to the data register 12, and the control section 1 controls the entire system.

In FIG. 1, when changing the state, the signal line 122
The state of the above display/change request signal is set to 61'' to indicate that the display/change is completed.

The control unit 1 checks the display/change request signal on the signal line 122, and if it is 9 that allows the requested money to be accepted, sets the state of the ready signal on the signal line 123 to 1'' and accepts the command and data. Indicates that the register system #2 is ready.
1", input the register select on the signal line 125 to the data register 12, and input the R/W on the signal line 121 (set No. N to the writing letter, book,
Set the changed data in the data register 12. At the same time that data is set in the data register 12, the value of the data flag 15 becomes '1'.
The above R/W signal is set to the write state, and the command to be changed is set in the command register 11. At the same time as this operation, the command flag 14 is set.

When the command flag 14 is set, the control section 1 sets the state of the ready signal to 10'', internally analyzes the command, and changes the contents of the data register 12 according to the contents of the corresponding register and flag of the processor section.

When the above change is completed, the control unit 1 changes the ready signal state to "1" and becomes ready to input the next command.

If the state t- is to be displayed on the arrow, the display/frugality request signal on the signal line 122 is set to the state t-'''1'' to indicate that the display/change is to be performed. Similarly to the changing operation, the control unit 1 sets the state of the ready signal on the signal line 123 to "1". When the external device confirms that the state of the ready signal is "1", it sets all commands in the command register 11. At the same time as this operation, the command flag 14 is set. When command flag 14 is set, the control
In part 1, the state of the ready signal ft is set to ``0'', and all commands are analyzed, and the contents of the corresponding registers and flags of the processor section are loaded into the data register 12, and the state of the ready signal is set to 11''.The state of the ready signal is When the external device confirms that t becomes "1", the control unit 1 sets the data register 1.
2 contents t-read and display.

, @2fg is a flowchart showing the flow of money in the first process.

Next, the processing executed by the control unit 1'''C will be explained with reference to a flowchart.

In FIG. 2, in step 201, execution of the microinstruction is started after the start, and in step 202, it is checked whether the software instruction has finished or not. If not, all microinstructions are executed again in step 201.

When the software instruction ends, all checks are made in step 203 to see if there is a mode switching request signal. If the request is not satisfied, the process moves to step 209 to retrieve the next software instruction. If the above request exists, it is checked in step 204 whether the command is set. If the command is not checked, repeat step 204t until it is set. If the command is set, it is determined in step 205 whether or not it is an end command. If it is an end command, a ready signal is set in step 208, and the process moves to step 209 to execute the arrow command. If it is not an end command, the next operation is executed as instructed in step 206, a ready signal is set in step 207, and after t, the process returns to step 204.

From then on, steps 204 to 2 are executed until the termination command arrives.
Repeat step 07.

(Effects of the Invention) As explained above, the present invention provides a microprocessor with a command register and a data register, and furthermore, by adding a control signal line, it is possible to easily change the internal state of the processor. It has the effect of being able to show oneself.

Furthermore, the above configuration has the advantage that the internal state of the microprocessor can be changed/displayed without occupying the program area.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of an information processing apparatus according to the present invention. FIG. 2 is a flowchart showing the operation of the control section in FIG. 1. Figure @3 is an explanatory diagram showing the concept of information processing f2 according to the prior art. 1... Control # section 2... Register control section 11.12
...Register 13...Selector 14.15...
・Flag 16.17...Sequential buffer 31...Microprocessor 32...Memory 32
1-323...Memory areas 121-125, 131-136.310-312...
・Signal lines 201 to 209...Processing steps Fig. 1 Fig. 22 Fig. 3

Claims (1)

[Claims] In order to display or change the internal state of the microprocessor, a command register for storing a command instructing the display or modification operation, and a command register for storing a command instructing the display or modification operation; a data register for storing an internal state of the microprocessor, and for storing the internal state of the microprocessor to be changed when the contents of the command register instructs the change; and a display of the internal state of the microprocessor; Information processing characterized by comprising a control means for setting the command register and the data register in accordance with a change instruction, controlling the display or change operation, and completing the operation. Device.