JPS605365A - Distributed data processor - Google Patents

Abstract

PURPOSE:To reduce the burden on an operator by allowing a master station to execute polling to each work station at constant intervals of time and obtaining its operation status. CONSTITUTION:A system controller (SC) 12 is equipped with a system configuration register (SCR) which indicates the operation state of respective work stations (WS) 1-7, and when a program is loaded to some WS and the WS becomes ready to operate, its corresponding bit is set to ''1''. The SC 12 sends the polling signal to the WSs 1-7 at constant intervals of time to check whether each WS is in operation or not, and clears the corresponding bit of the SCR to ''0'' when not operated. The contents of the SCR in the SC 12 are transferred to a work station controller (WSC) 13 at constant intervals of time and set in a system status register (SSR) in the WSC. The WSC 13 displayes WSC* on a CRT display device 14 when the corresponding bit of the SSR is set to ''1''.

Description

Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to a distributed data processing device suitable for use in a relatively small-scale system in which a system controller for controlling the entire system is built into a workstation housing. .

[Technical background of the invention and its problems]

A distributed data processing system consists of a system controller and multiple workstations. Advances in IC technology have led to miniaturization of system controllers, and in small-scale distributed data processing systems, it has become possible to implement a combination of a system controller and a workstation in the same workstation housing.

The system configuration of the above-mentioned distributed data processing system is
As shown in the figure.

In the figure, a workstation I is a master station comprising a communication interface 11, a system controller 12, a workstation controller 13, a CRT display device I4, a keyboard device FT15, a printer 16, a hard disk device 17, and a floppy disk device 18. The master station J is commonly connected to a plurality of workstations through a local area network (coaxial cable 8). The illustrated workstations 2 and 7 include workstation controllers 23 and 73, and a CRT display device 2, respectively.
4, 74, a keyboard 25, 75, a floppy disk device 28, and a printer 76. Each workstation zNy is controlled by a system controller 12 and can share mutual input/output devices (communication interface disk, printer, floppy disk).

By the way, each workstation z-yId is installed at a different location. Therefore, it is naturally conceivable that, for example, while the workstation thread is accessing the magnetic disk device 17 built into the workstation 1, the power of the workstation J may be turned off. At this time, the workstation 2 becomes inoperable and suffers from a serious problem. In consideration of such a case, the operator of Workstation J should return the control mode to privileged mode (operating system level) before turning off the power, and issue a special command (e.g. Eva SS ALL).
command)? f, displayed the status of each workstation, and after confirming that there was no access from anyone else, executed the power OFF operation.

The display format is shown in FIG.

Therefore, not only will the program currently being executed be stopped, but the above-mentioned operations will impose a considerable burden on the operator and are complicated, so there is a risk of accidentally turning off the power and causing the above-mentioned problems. expensive.

[Purpose of the invention]

The present invention eliminates the above-mentioned problems in a relatively small-scale system in which a system controller that controls the entire distributed data processing system is built into a workstation housing, and has multiple systems connected via a local area network. It is an object of the present invention to provide a distributed data processing device in which it is possible to easily determine whether a workstation is in operation and to reduce the burden on an operator.

[Summary of the invention]

In the present invention, among the workstations connected to a local area network (on a coaxial cable), a master station polls each workstation at regular intervals to obtain its operating status, and stores this information in built-in memory. . Then, the operating status obtained here is commonly loaded to each workstation, and each workstation has its own operating status obtained by loading the CRT.
It is displayed in a partial area of the device.

Therefore, the operator can call attention simply by visually observing it, and can eliminate the erroneous operation (turning off the power) without the need for the above-mentioned complicated operations.

As a result, the operational status of each workstation constituting the distributed data processing system can be constantly monitored without stopping the program being executed, and the above-mentioned problems caused by turning off the power can be solved.

[Embodiments of the invention]

Hereinafter, the present invention will be explained in detail using the drawings.

FIG. 1 is a block diagram showing an example of the configuration of a distributed data processing system to which the present invention is adopted. As mentioned above, in the figure, J is the master workstation in which both the system controller (S012) and workstation controller (WSC13) are housed in the same carcass. The system controller I2 supports the overall system control and communication interface 11, and the workstation controller xs controls the connected input/output devices under the control of the system controller 12. In the embodiment of the present invention, this system controller 12
A system configuration register (in which the operating status of each workstation 1 to 7 is maintained)
SCR) is allocated to internal memory. Further, the workstation controller 13 has a built-in system status register (SSR), in which information is set as to whether or not to display the operating status of each workstation on the CRT display device fI 4 built into the workstation J. Ru.

The input/output devices connected to the workstation 13 include a CRT display device 14 for displaying data (including status), a keyboard device 15 for inputting data, a printer for printing out data, a hard disk device 17 for storing data, There is also a floppy disk device that inputs and outputs data. The -y meta workstation 1 is commonly connected via a local area network 8 to a plurality of workstations consisting of workstation controllers and built-in input/output devices. Workstation consideration ~ 7 Built-in workstation controller 23. 73 and input/output equipment 24° 25.
Since 2B, 74, 75, and 76 have been described above, their explanations will be omitted here to avoid duplication.

FIG. 3 shows an example of the status display displayed on the CRT display screen 14 within the workstation L by implementing the present invention. In the embodiment of the present invention, 25
The row 1 is the status display area.

FIG. 4 td is a diagram showing the bit format of a system configuration register (SCR) provided in the system controller 12. '1'' is READ
Y, "0" indicates READY.

FIG. 5 shows a system status screen that holds information on whether to display the operating status of each workstation on the built-in CRT display device t14 of the workstation.
FIG. 3 is a diagram showing a bit format of a register (SSR). 1'' means status display is present, and 0'' means no status display.

In FIGS. 4 and 5, it is assumed that each bit position corresponds to the number of each workstation.

Hereinafter, the operation of the embodiment of the present invention will be explained in detail using the drawings. First, when the power of the workstation L is turned on, an IPL (IPL) is sent from the hard disk device 17 or floppy disk device 18 to the workstation controller 13.
a m L Oad ing; Initial program low)') F; a: Executed. When the IPL for the workstation controller 13 is completed, a program is then loaded from the hard disk drive 17 or the floppy disk itzg to the system controller 12 via the workstation controller 13, and the workstation J becomes operable as a master station.

On the other hand, when the power of the workstation is turned on, a downline load request for a program is issued from the workstation controller 23 built into the workstation. This request is immediately transferred via the local area network 8 to the system controller o-)7zz built in the workstation J. System controller 12
downloads the program from the workstation controller 13 and executes a downline load to the workstation controller 23 built into workstation z. By this download line load, when the transfer of the workstation control program is completed, the workstation main operation becomes possible. The workstation control program is loaded in the same manner for other workstations, thereby enabling them to operate.

The system controller 12 is connected to each workstation 1-
It is equipped with a system configuration register (see Figure 4; scR) that shows the operation status sequence of 7, and when the program loading to the workstation is completed and the workstation is ready for operation, the corresponding bit is set to +1''. In addition, the system controller 12 polls each workstation J-1 at regular intervals to check whether each workstation 2-7 is in operation.
If it is not in operation (power supply OFF), the corresponding bit of SC'R is cleared to "0".

The contents of the SCR built into the system controller 12 are transferred to the workstation controller 13 at regular intervals and set in the system status register (see SSR in FIG. 5) built into the workstation controller 13. In the workstation controller 13, when the corresponding bit of this SSR is set to 71'', the CRT
On the display screen of the display device 14, status (,5) corresponding to the bit position is displayed on the bottom line (25th line). A display example is shown in FIG. Here or indicate the number of the workstation. Therefore, the operator operating the workstation J can always judge the operating status of each of the workstations J to Z, and can prevent the workstation 1 from being erroneously turned off.

〔Effect of the invention〕

As explained above, the present invention has the following effects.

(1) The operating status of each workstation constructing a distributed data processing system can be constantly monitored without stopping the running program.

(2) Since the operations of other workstations can be easily determined, it is possible to prevent erroneous operations such as erroneously turning off the power of the mask station.

[Brief Description of the Drawings] Fig. 1 is a block diagram showing a configuration example of a distributed data processing system to which the present invention is adopted; Fig. 2 is a diagram showing an example of status display in a conventional method on a display screen; Figure 3 is a diagram showing an example of the status display in the present invention on a display screen, Figure 4 is a diagram showing the bit format of the system configuration register (SCR) used in the present invention, and Figure 5 is a diagram showing an example of the status display in this invention. FIG. 3 is a diagram showing the bit format of the system status register (8SR) used in accordance with the invention. 1 to 7...Workstation, 8...Local area network (coaxial cable), 11...Communication interface, 12...System controller, 1
3,23.73...Workstation controller, 14,24.74...CRT display device. Applicant's agent Patent attorney Takehiko Suzue Figure 2 Figure 4

Claims (1)

[Claims] In a distributed data processing system in which multiple workstations are connected on a single bus, one of the workstations serves as a master station and serves as a system controller that manages each workstation connected to the system, as well as its own workstations. The system controller is equipped with both a workstation controller that controls the input/output equipment connected to the station, and the system controller checks the operation of each workstation at regular intervals to obtain its operation status, and has a memory to hold them and a It has a circuit for commonly coding the held operating status to each workstation, and each workstation stores the loaded operating status in its built-in memory and displays the operating status in a part of its own display device. A distributed data processing device characterized by constantly displaying and notifying an operator.