JPH04162090A - Display device - Google Patents

Abstract

PURPOSE:To simplify the switching operation of window display by temporarily storing window display information optionally selected on a display image plane, and recall-displaying it at the desired time. CONSTITUTION:When an image memory key 41 is pressed down, a CPU 10 detects the indication of image plane memory and reads the display information of a display memory 50 so as to transfer it to a floppy disk storage device FDD 70 and to store one image plane part display information of the memory 50 temporarily into the FDD 70. The CPU 10 is then reset to the normal control procedure, and when a recall display mode is indicated by a mode switching key 42, the display information stored in the FDD 70 is transferred/stored into the memory 50. The recall object display information stored in the memory 50 is read out at a fixed cycle by a DMA controller 52 and displayed on a display image plane.

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a display device that performs multi-window display. [Prior Art 1 Conventionally, in general, a multi-window display device or an information processing device incorporating this display device is provided with an information storage memory and a display memory for one display screen, and each time a window is displayed, the display device shown in FIG. The information to be displayed in the window is transferred from the information storage memory 2 to each window area of the display memory 1 as shown in FIG. The information stored in the display memory 1 is converted into image information in synchronization with the raster display, and is visually displayed on the display screen. [Problems to be Solved by the Invention] In a display device that performs such a multi-window display, when displaying another window display C superimposed on the window displays A and B on the previous screen in FIG. 4, the display memory 1 In this case, the stored information regarding window displays B and A in the storage area corresponding to window display C is erased. Therefore, in order to newly display window display B in FIG. 4, the operator must display the windows in a fixed order, that is, display window A, and then perform an instruction operation to switch the display to window B. Particularly, when operating information is transferred from the programmable controller 5 to the programming device 3 and displayed as shown in FIG. 5, there may be an urgent need to confirm the operation when an abnormality occurs. In such a case, the above-mentioned conventional display device has a problem in that operations for reproducing a desired window display are complicated and time-consuming. Therefore, in view of the above-mentioned points, the present invention simplifies the window display switching operation by temporarily storing the window display information arbitrarily selected on the display screen and re-displaying it at a desired time. The purpose of the present invention is to provide a display device that achieves this. Means for Solving 1 Problem] In order to achieve such an object, the present invention provides a memory for storing display information for one screen to be displayed in a display device capable of multi-window display. means, first instruction means for instructing temporary storage of display information of the current display screen; auxiliary storage means; a first storage control means for transferring and storing data in the storage means; a second instruction means for switchingly instructing the normal display mode and the reproduction display mode; and when the normal display mode is instructed by the second instruction means, a second memory control means for causing the storage means to store display information received from an external information source, and when the reproduction display mode is instructed, for causing the display information in the auxiliary storage means to be transferred and stored in the storage means; It is characterized by having the following. [Operation j] According to the present invention, a window screen at an arbitrary position can be reproduced and displayed at an arbitrary time simply by the operator instructing to store the display information on the display screen and instructing the reproduction display mode. Further, the instruction operation for reproducing the display information is performed only once, and there is no need for multiple switching instruction operations as in the prior art.

[Embodiment j] An embodiment of the present invention will be described in detail below with reference to one drawing. FIG. 1 shows the basic configuration of an embodiment of the present invention. The display device in this embodiment is a display device capable of multi-window display. In FIG. 1, 1100 is a storage means for storing display information for one screen to be displayed. 1200 is a first instruction means for instructing temporary storage of display information of the current display screen. 1300 is an auxiliary storage means. Reference numeral 1400 denotes storage control means for transferring and storing one screen worth of display information in the storage means to the auxiliary storage means in response to an instruction from the instruction means. Reference numeral 1500 denotes a second instruction means for switching between the normal display mode and the reproduction display mode. 1600 stores the display information received from an external information source in the storage means when the normal display mode is instructed by the second instruction means; and when the reproduction display mode is instructed by the second instruction means, the display information is stored in the storage means. The second storage control means transfers and stores display information of the auxiliary storage means in the storage means. FIG. 2 shows a circuit configuration of a programming device to which the present invention is applied. In Figure 2, the central processing unit (CPII) 1.0
．． System memory 20. Program memory 30. Keyboard input device 40. A bus switch 51 and a floppy disk storage device (FDD) 70 are commonly connected to the bus. In addition to controlling the operation of the entire device, the CPU 10 creates and edits a sequence program to be executed in the programmable controller on the program memory. Also, CPUl
0 executes display control operations for multi-window display. As will be described later, CPt11.0 is the first embodiment of the present invention. It operates as a second storage control means. In addition to the control procedures shown in FIG.
A control procedure for executing the above-described control of P[Jlo is stored. The keyboard input device 40 has keys for inputting program commands constituting a sequence program, keys for inputting numerical values and characters, keys for issuing operation instructions for the CPU10, a screen memory key 41 related to the present invention, and a mode switching key 42. The screen storage key 41 is a key for instructing the CPU10 to store the display information of the current display screen as a first instruction means of the present invention. The mode switching key 42 serves as a second instruction means of the present invention and selectively instructs the normal display mode and the reproduction display mode. A display memory 50 is connected to the bus switch 5, and the bus is opened and closed according to instructions from a direct memory access (DMA) controller 52. In this example, while raster display is being performed in the display circuit 60, the bus switch 5] is open and the CPU
Writing of display information to the display memory 50 of 0 is prohibited. In addition to the above-mentioned bus control, the DMA controller 52 outputs an address signal to the display memory 50 during raster display, and reads out display information in display order from the top address of the display memory. Display information in the form of an information code is converted into image information in the form of dots by a character generator 61,
/S) is transferred to the display drive circuit 63 via the converter 62. The display drive circuit 63 visually displays the display information by lighting each display pixel on the display screen based on this image information. The FDD 70 reads/writes created sequence programs and display information that has been instructed to be stored onto a floppy disk. The FDD 70 and floppy disk operate as auxiliary storage means of the present invention, and the display memory 50 operates as storage means of the present invention. Multi-window display processing in such a circuit configuration will be explained. In response to an instruction from the keyboard input device 40, the CPU 10 reads the program memory 30 according to a conventionally well-known processing procedure.
The information to be displayed for each area of the window is read and written into the display memory 50. At this time, it is assumed that display information obtained by combining three windows as shown in FIG. 4 is stored in the display memory 50. When the operator presses the screen memory key 41, the control procedure shown in FIG. 3 is executed in an interruptive manner in the CPU10. That is, the CPU 10 identifies the code signal generated by the screen storage key 41 and detects that a screen storage instruction has been given (step 51 (10 in FIG. 3). Next, the CPU 10 receives write permission from the DMA controller 52. While inputting a signal (a conventionally known signal indicating that raster display is not being performed), the display memory 50
The memory (display) information is read from the first address of the CPU.
After reading into L0, the read display information is transferred to the FDD 70. By repeating the above-mentioned procedure, display information for one screen of the display memory 50 is stored on the FDD 7.
0 (loop processing of steps 8111 to 5113 in FIG. 3). At this time, CPU10 operates as the first storage control means of the present invention. After this processing, CP+11.0 returns to the control processing procedure that has been executed so far and waits for an instruction from the operator regarding screen reproduction. If you want to see the temporary memory multi-window screen,
The operator instructs the reproduction display mode using the mode switching key 42. In response to pressing this key, the control procedure shown in FIG. 3 is executed again in CPtJlo. That is,
When the instruction for reproduction display mode is detected in step 5200 of FIG. 3, CPt11O transfers and stores the display information stored in the FDD 70 to the display memory 3o (step 5210 of FIG. 3). This processing procedure is step S in Figure 3.
1] This is the reverse procedure of the transfer process to the FDD 70 of 1 to 5113, and detailed explanation will be omitted. CPt1l at this time
O operates as the second storage control means of the present invention. As a result, the display information to be reproduced stored in the display memory 50 is read out at regular intervals by the DMA controller 52 and displayed on the display screen. Furthermore, when an instruction to switch from the reproduction display mode to the normal display mode is given by the mode switching key 42, CPt1
In step 5300 of FIG. 3, the 1O specifies the memory for storing information to be displayed as the program memory 30 or other memory to enable display in the normal display mode as in the past. As a result, the display information read from these memories is overwritten in the display memory 50, so that the reproduced display image on the display screen is erased. As described above, in this embodiment, the display information of the multi-window screen is temporarily stored and reproduced and displayed at an arbitrary time. Therefore, it is clear that the operator's operation is simplified and the time required to obtain the desired screen is shortened compared to the conventional case where the operator overlaps the window screens to obtain the desired window screen. In addition to this embodiment, the following examples can be cited. 1) In this embodiment, the display information stored in the display memory 50 is in the form of an information code, but image information in the form of dots after being converted into an image pattern may be stored. 2) Furthermore, in a programming device that directly transfers information read from the program memory 30 or other memory (not shown) to the character generator 6, the program memory or the like may be treated as a display memory. 3) Of course, the FDD 70 may be provided with storage areas for a plurality of double sides, and the display information of the plurality of display screens may be sequentially stored by the CPU. In addition, information on multiple screens to be displayed when displaying the operating state of the programmable controller in relation to the sequence program is stored in the display memory 50 or the program memory 3.
0 to the FDD 70 by the CPU 10. [Effects of the Invention j] As described above, according to the present invention, by temporarily storing a multi-window screen and reproducing it, it is possible to simplify the operator's window screen switching operation.

[Brief explanation of the drawing]

1 is a block diagram showing the basic configuration of an embodiment of the present invention; FIG. 2 is a block diagram showing a circuit configuration of an embodiment of the present invention; FIG. 3 is a flowchart showing the execution processing procedure of CPU10 in FIG. 2; FIG. 4 is an explanatory diagram showing the display procedure of a conventional multi-window display, and FIG. 5 is a perspective view showing the system configuration of the conventional example. 10... CPtJ, 40... Keyboard input device, 50... Display memory, 70... Floppy disk memory device. Is it #tithe? Shisentsui / Dou display indicator) Lilo book 1 Inkstone Meisen Figure 4

Claims (1)

[Claims] 1) In a display device capable of multi-window display, a storage means for storing display information for one screen to be displayed, and an instruction to temporarily store display information of the current display screen. auxiliary storage means; first storage control means for transferring and storing one screen worth of display information in the storage means to the auxiliary storage means in response to an instruction from the instruction means; a normal display mode; a second instruction means for switchingly instructing the reproduction display mode; and when the second instruction means instructs the normal display mode, storing display information received from an external information source in the storage means; A display device comprising: second storage control means for transferring and storing display information in the auxiliary storage means in the storage means when the reproduction display mode is instructed.