JPH05257629A - Message display system - Google Patents

Abstract

PURPOSE:To immediately display an error occurring to an OS which does not occupy a terminal device (KB/CRT), as a message. CONSTITUTION:Respective OS1 and OS2 are equipped with KB/CRT control programs 12 and 21 which control a KB/CRT 5, a memory area 31 which can be read and written by both the OS1 and OS2, and firmware 3 which issues a command to the control program of the OS occupying the KB/CRT 5 when there is a message in the memory area 31. Consequently, the OS which occupies the KB/CRT 5 can displays the message on the KB/CRT 5 without performing exclusive control.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a plurality of O's operating simultaneously.
The present invention relates to a message display method capable of notifying an error detected by one OS to another OS in a terminal device having S.

[0002]

2. Description of the Related Art Conventionally, this type of message display system is
Since each OS is closed, only the OS that occupies the terminal device (hereinafter referred to as the fore OS) can use the terminal device, and the OS that does not occupy the terminal device is unoccupied. Was used after being.

[0003]

In the above-mentioned conventional message display system, since the fore OS occupies the terminal device exclusively, the message is urgently displayed on the display unit of the terminal device.
If the program requesting some instruction by the operator is the back OS, there is a disadvantage that no message is displayed on the terminal device unless the operator switches the OS.

[0004]

SUMMARY OF THE INVENTION The present invention is a message display method in a terminal device that simultaneously executes a plurality of OSs, wherein each of the plurality of OSs includes a control program for the terminal device and a plurality of the OSs. It also has a readable / writable memory area and firmware for issuing a command to the control program of the OS occupying the terminal device when a message is present in this memory area.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of a message display system according to an embodiment of the present invention. The message display system of the present embodiment includes a terminal device (hereinafter referred to as KB / CRT) 5 whose main part has one display part and two OSs.
1, OS2, application program 11 operating in OS1, terminal device (KB / CRT) control program 12, KB / CRT control program 21 operating in OS2, hardware 4 and this firmware 3 , OS1 and OS in this firmware 3
It is composed of a memory area 31 which can be read and written by any of the two.

OS1 is operating as a back OS
It is S. Also, OS2 operates as a fore OS, and K
It is an OS displaying the B / CRT 5 using the KB / CRT control program 21. OS1 which is the back OS
The application program 11 in the program uses the command a prepared by the OS 1 to send a message to the memory area 3
Write to 1. Then, when the writing of the message to the memory area 31 is completed, the command b of the firmware 3 is sent.
The KB / CRT control program of OS2, which is the fore OS, is notified by this and displayed on the KB / CRT5.

Next, the operation of the message display system of the present embodiment thus constructed will be described.

First, the application program 11 of the OS 1 detects an error that urgently needs to display a message, and writes the message in the memory area 31 which can be read and written by any OS by the command a. Then, when the writing of the message to the memory area 31 is completed, the fore
Notify the KB / CRT control program 21 of OS2, which is S, that there is an urgent message. Upon receiving the command B, the KB / CRT control program 21 outputs the contents of the memory area 31 (display) to the KB / CRT control request C.
Display the message on 5.

[0010]

As described above, according to the message display method of the present invention, a plurality of OSs each control program of the terminal device, a memory area readable and writable by any of these OSs, and data stored in this memory area. By providing the firmware that issues a command to the control program of the OS occupying the terminal device when there is an error, the operator can immediately display a message without switching the control of the terminal device to the OS in which the error has occurred, and the operator Can be informed.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration for realizing an embodiment of the present invention.

[Explanation of symbols]

1 OS operating in the back 2 OS operating in the foreground 3 Firmware 4 Hardware 5 Terminal device (KB / CRT) 11 Application program 12, 21 Terminal device (KB / CRT) control program 31 Reading and writing from multiple OS Available memory area a Command for writing to memory area b Command for notifying that there is a message in memory area c Output (display) request

Claims (1)

[Claims] 1. A message display method in a terminal device that simultaneously executes a plurality of OSs, wherein each of the plurality of OSs has a control program for the terminal device, and a memory area readable and writable by any of the plurality of OSs. When there is a message in this memory area, the terminal device has firmware that issues a command to a control program of an OS that exclusively uses the terminal device, and the OS that exclusively uses the terminal device does not perform exclusive control. A message display method characterized in that the message is displayed on the screen.