JPS6122813B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a data processing device that performs interrupt processing.

Processing devices, such as data processing devices that handle data processing, have improved in performance and are equipped with means for handling interrupt tasks that occur asynchronously during the execution of routine tasks, improving system throughput.

However, since it was not possible for the operator to know what interrupt task was currently being executed or when it would be canceled and the original task could be resumed, the operability of the data processing apparatus was degraded. The present invention provides a data processing device that improves the above points.

The present invention provides an interrupt key for driving an interrupt program, a display means for displaying the interrupt level of the interrupt program in response to pressing of the interrupt key, and also displaying the interrupt level of the interrupt program that is already being executed. and means for erasing the display of the interrupt level in response to the termination of the interrupt program, and provides a data processing device capable of monitoring multiple interrupt programs.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention.

In the figure, 1 is a processing device that controls the entire device, and 2 is an input device that includes a PS interrupt key 3. Reference numeral 4 denotes an output device for displaying calculation results and status, and as shown in FIG. 2, it has a level position 4A for displaying information indicating the level and name of the interrupt program.

Reference numeral 5 denotes a display interface, which has a memory that can store data that can be displayed at one time on the output device 4 and a control circuit that controls sending the contents of the memory to the output device 4. When the content displayed at the level position 4A is also written to a predetermined position in the memory by the processing device 1, it is displayed at the level position 4A of the output device 4 by the control circuit within the display interface 5. .

Reference numeral 6 denotes a control memory storing a multiple interrupt control routine, in which procedures as shown in FIGS. 4A and 4B are stored.

7 is a memory that stores user programs, etc.
As shown in FIG. 5, a main program a, a first stage interrupt program b, and a second stage interrupt program c are stored. In each program, among the interrupt key group 3, keys PS1, PS4,
PS5 is defined in each of the programs mentioned above.

8 is a stack memory, which, as shown in FIG. 3, consists of a stack pointer SP, a location stack LS, and an interrupt stack IS.

9 is a bus for transmitting data control signals and the like.

The operation of the embodiment having the above configuration will be explained.

When the main program stored in the memory 7 is being executed, the display at the level position 4A is blank as shown in FIG. 6A.

If an interrupt task occurs now, for example, key PS1 of interrupt key group 3 is pressed. Here, the processing device 1 controls the interrupt start of the control memory 6 (FIG. 4A).
Execute. First, if stack 8 has overflowed or if there is nothing in stack 8, the result is NO, the contents of stack pointer SP are increased by 1, and the key PS is
1, the interrupt address is placed in the location stack LS, and the data of key PS1 is placed in the interrupt stack.
Push to IS. Next, the contents of the interrupt stack IS are sent to the display interface 5 for display.

Next, when the interrupt key PS4 is operated while the program of the interrupt key PS1 is being executed, the control is performed in the same manner as described above, and the display is as shown in FIG. 6C.

When the program of the key PS4 is finished, the control procedure shown in FIG. 4B is executed, and the level display position 4 is
The display of "4" from A disappears and the program of key PS1 restarts.

Further, when the first stage interrupt service is completed, the "1" of level 1 disappears and the program returns to the main program.

According to the present invention, it is possible to identify at a glance which interrupt tasks are currently being executed, and to predict which tasks will be restarted when the system returns.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing an output device, FIG. 3 is a diagram showing a stack 8, FIGS. 4A and B are diagrams showing a control procedure, and FIG. The figure shows the program in the memory 7,
FIGS. 6A, B, C, D, and E are diagrams for explaining the operation. 3... Interrupt key group, 8... Stack, 6...
control memory.

Claims (1)

[Claims] 1: an interrupt key for driving an interrupt program; display means for displaying the interrupt level of the interrupt program in response to pressing of the interrupt key; and display means for displaying the interrupt level of the interrupt program already being executed; and the interrupt program. and means for erasing the display of the interrupt level in response to the termination of the interrupt level, and is capable of monitoring a multiple interrupt program.