JPS63239516A - Emulation method for plural input device - Google Patents

Abstract

PURPOSE:To connect plural input devices to one personal computer and to play plural roles by making preparations for the scanning corresponding table of keyboards 1 and 2 and setting it to the converting mode of the keyboards 1 and 2. CONSTITUTION:Presently when a key top A of a keyboard 1 is depressed, a scanning code A for a board 1 is read. Since it is set to the exchanging mode of keyboards 1 and 2, a code A is converted to a scanning code B for the keyboard 2 with a scanning code corresponding table. Next, the code B is converted to a key code for a board 2 and stored into a buffer for a board 2. Thereafter, when application programs A and P call out A and P calling routines for a board 2, the keycode for the board 2 is read from the buffer for the board 2, and therefore, to input the key top A of the board 1 and the key top B of the board 2 obtains the same result.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an input method for a personal computer, and in particular, a plurality of input devices are connected to one personal computer, and any input device is connected to any other input device. The present invention relates to a multiple input device emulation method suitable for enabling substitution of input devices.

[Conventional technology]

The conventional input method for personal computers is shown in Figure 4 (a).
), (b) will be explained using standard keyboard processing flow diagrams. The keyboard processing is the interrupt processing routine in FIG. 4(a) and A in FIG. 4(b).

It is roughly divided into two parts: P and (application program) calling routine. In the interrupt processing routine shown in FIG. 4(a), when a key on the keyboard is input, the scan code is read out (4o), the scan code is converted into a key code exclusively for that keyboard (41), and the key code is dedicated to the keyboard. (processing 42).

In the A and P call routines in FIG. 4(b), it is determined whether the key code is being read or not (process 43), and if it is a key code reading, the key code stored in the interrupt process (process 42) is read from the dedicated keyboard buffer. Processing 44
), and if the key code is not read, the key code presence information is set to check the presence/absence of the key code in the dedicated keyboard buffer (45), and it is determined whether there is a key code in the dedicated keyboard buffer. (Process 46), and if there is a key code, the process ends; if there is no key code, information on the absence of a key code is set and the process ends (Process 47).

In this conventional standard keyboard interrupt processing, when the scan code is read (process 40) and converted into a key code (process 41), it is always stored in its own keyboard buffer (process 30). ,
Even if a plurality of keyboards are connected to one personal computer, if one keyboard becomes unusable due to a failure or the like, it cannot be replaced with another keyboard, so the only option is to replace it.

[Problem that the invention seeks to solve]

The above-mentioned conventional technology does not take into account the fact that a plurality of input devices can be connected to one personal computer and one input device can be used as a substitute for another input device.
If two input devices 1 and 2 are connected, and input device 1 is intended to substitute for input device 2!2, input device 1
It is necessary to input the input information from input device 2, convert it to correspond to the input information for input device 2, and then save it in the input information save area for input device 2. Also, if there is input from input device 2, the input information In order to avoid mixing of information, it is necessary to either perform the opposite process to the above or discard the input information, whereas in the past, the input information reading section and the input information save area could not be separated. Therefore, if one input device becomes unusable due to a failure or the like, there is a problem in that the only option is to replace it with the same product.

SUMMARY OF THE INVENTION An object of the present invention is to provide a multi-input device emulation method that makes it possible to substitute an input device by separating the input information reading section and input information save area of a personal computer and combining them with other input devices. be.

[Means for solving problems]

The above purpose is achieved by, for example, assuming that two keyboards 1 and 2 are connected to one personal computer and keyboard 1 is used in place of keyboard 2, as illustrated in the interrupt processing flow for keyboard 1 in FIG. Prepare a scan code correspondence table for keyboards 1 and 2 in advance and set the keyboard 1 and 2 conversion mode.When a key on keyboard 1 is input, control is transferred to the keyboard 1 interrupt processing routine and the key top is input. Then, read out the corresponding physical code (scan code).

Since the keyboard 1 and 2 exchange mode is set, convert it to the scan code for keyboard 2 using the scan code correspondence table, and then convert the interrupt processing for keyboard 2 to the key code for keyboard 2 in the same way. By storing the key code in the buffer, if A, P then calls the conventional A, P, calling routine for keyboard 2, the key code for keyboard 2 will be passed to A, P. achieved.

[Effect]

In the multiple input device emulation method described above.

For example, if there is an input from keyboard 1 in keyboard 1, 2 exchange mode, the input from keyboard 1 is transferred to keyboard 2 by storing it in the keyboard 2 buffer.
This is possible by separating the scan code fetching section and the key code buffer store section and combining them with those of other keyboards, and also ensuring that there is a one-to-one correspondence between them. This combination eliminates the problem of key codes from multiple keyboards being mixed in one keyboard buffer, allowing one keyboard to serve as two keyboards, and also preventing one keyboard from malfunctioning. In this case, you can use the other keyboard instead.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

First, FIG. 3 is an external perspective view of a personal computer showing an embodiment of the multiple input device emulation method according to the present invention. In FIG. 3, a personal computer consists of an input/output device, a storage device, a display device, and a control device, 1 is a keyboard 1, 2 is a keyboard 2, 3 is a floppy disk driver, and 4 is a CRT. Here, there are two keyboards 1 and 2 on the computer.
It is assumed that keyboard 1 is used in place of keyboard 2, and keyboard 2 is used in place of keyboard 1.

Next, FIG. 1 is a flowchart of interrupt processing for the keyboard 1 showing an embodiment of the multiple input device emulation method according to the present invention. Here, keyboard 1 and keyboard 2 have different functions but have the same number of key tops. First, prepare a scan code correspondence table for keyboards 1 and 2, then keyboard 1-. 2 Set to exchange mode (set and execute the command). It is assumed that the scan code (key top) A of the keyboard 1 corresponds to the scan code (key top) B of the keyboard 2.

If you now press key top A on keyboard 1, the interrupt handling routine for keyboard 1 will work.

Read keyboard Doyo scan code A (process 10
).

Next, process 11) to determine whether the keyboard 1 and 2 exchange mode is set. Since the keyboard 1 and 2 exchange mode is set, use the scan code correspondence table above to change the scan code A for keyboard 1 to the scan code for keyboard 2. Convert to B (process 12). Next, the scan code B for keyboard 2 is converted into a key code for keyboard 2 (process 13), and the key code for keyboard 2 is stored in the buffer for keyboard 2 (process 14). Above process 1
0 to 14 are keyboard 1 and 2 for keyboard 1 interrupt processing.
Forms the code converter. After that, A, P, are keyboard 2
When the A, P, calling routine is called, the A, P, calling routine is the same as the conventional one shown in Figure 4(b), so the key code for keyboard 2 stored in the above interrupt processing is transferred from the keyboard 2 buffer. For reading, inputting key top A on keyboard 1 and key top B on keyboard 2 will yield the same result. Furthermore, keyboard 1
, 2 If the conversion mode is not set, the
), so convert the scan code A for keyboard 1 to the key code for keyboard 1 15)
, the key code for keyboard 1 is stored in the buffer for keyboard 1.

Further, FIG. 2 is a flowchart of interrupt processing for the keyboard 2 showing an embodiment of the multiple input device emulation method according to the present invention. If we now press key top B of keyboard 2, we will read out scan code B for keyboard 2 in exactly the same way as above (20), keyboards 1 and 2.
Since the conversion mode is set (process 21), convert the scan code B for keyboard 2 to the keyboard] user scan code A (process 23), and then convert the scan code A for keyboard 1 to the key code for keyboard 1. (
Process 23), and store the key code for keyboard 1 in the buffer for keyboard 1 (process 24). Above process 20
24 constitute a keyboard 2, 1 code converter for keyboard 2 interrupt processing.

After that, when A and P call the keyboard 1 calling routine, they can retrieve the key code for key top A as before. If the keyboard 1゜2 conversion mode is not set, the scan code B for keyboard 2 will be converted to the key code for keyboard 2 as before (25), and the key code for keyboard 2 will be converted to the buffer for keyboard 2. Store (process 26).

As described above, according to this embodiment, when the keyboard 1°2 conversion mode is set, the scan code for keyboard 1 is converted to the key code for keyboard 2, and stored in the buffer for keyboard 2, and Since the scan code is converted into a key code for keyboard 1 and stored in the buffer for keyboard 1, keyboards 1 and 2 can be substituted.

〔Effect of the invention〕

According to the present invention, it is possible to connect a plurality of input devices to one personal computer so that one input device can serve as multiple input devices, and it is also possible for a certain arbitrary input device to become unavailable due to a malfunction or the like. When this happens, it has the effect of allowing any other input device to be substituted6.

[Brief explanation of drawings]

FIG. 1 is an interrupt processing flow diagram for keyboard 1 showing an embodiment of the multiple input device emulation method according to the present invention, and FIG. 2 is a similar interrupt processing flow diagram for keyboard 2.
Figure 3 is also an external view of the personal computer, Figure 4
Figures (a) and (b) are conventional S-type keyboard processing flow diagrams. 1...Personal computer keyboard 1゜2.
... Keyboard 2.3... Floppy disk driver, 4... CRT, 10-14... Keyboard 1, 2 code converter for keyboard 1 interrupt processing, 20-24
... 2, 1 code converter for keyboard 2 interrupt processing,
43-47: Conventional keyboard A, P, calling routine. $ 1 Figure 2 (2nd II and (Rirunaso 4) Figure (b)

Claims (1)

[Claims] 1. In a personal computer consisting of an input/output device, a storage device, a display device, and a control device, a plurality of input devices are connected to one personal computer, and input information from one arbitrary first input device is transmitted to another. By converting the input information into input information for an arbitrary second input device and saving the converted input information to the input information save area for the second input device, the first input device can input the input information of the second input device. A multiple input device emulation method characterized by enabling substitution.