JPS61267155A - Initial program load system - Google Patents

Abstract

PURPOSE:To execute automatically the restarting of IPL and to shorten at the time of the rise of the system by executing the automatic change-over trial including the IPL control circuit at the time of the failure of the initial program load (IPL). CONSTITUTION:When a switch 10a or 10b for starting the initial program load (IPL) is pushed, a counter 100 is started, outputted to an output 11a or 11b and an IPL control circuit 300a is started. Thus, an IO device 500a is initially set and the data are transferred to a memory device 200a. An IPL action failure time detecting circuit 400 detects the IPL failure time and a counter 100 is started by an output 40. Thus, the counter 100 is stepped, the signal is generated at an output (b) and an IPL action is executed. In such a way, in the doubled system, either of the IPL starting switches 10a and 10b of both systems including the IPL control circuit is operated, and automatically, the IPL action of both systems can be executed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an initial program loading method suitable for simplifying operations when starting up a processing device, particularly when initial program loading fails.

[Background of the invention]

As described in Japanese Unexamined Patent Publication No. 58-44655, the conventional device controls the IPL machine number when IPL fails, and automatically executes all the prepared IPL machine numbers. However, simply changing the IPL machine number will be effective in the event of a failure in 10 devices, but will not be possible in the event of a failure in the IPL control circuit, so consideration must be given to retrying in the event of an IPL failure that includes the IPL control circuit. It wasn't.

[Purpose of the invention]

An object of the present invention is to automatically switch the IPL control circuit including the IPL control circuit when the IPL operation fails, and to quickly resolve the IPL failure.
The objective is to provide a PL system.

[Summary of the invention]

In the present invention, since IPL failures generally occur when IO equipment fails, the present invention is too preoccupied with this, resulting in a delay in responding to IPL control circuit failures, making it impossible to reconfigure the system, resulting in extended downtime. do. In order to solve these problems, an attempt is made to shorten the start-up time by attempting to switch the IPL circuit including the control circuit.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

When the IPL activation switch IQa or 10b is pressed, the counter 100 is activated and generates an output signal at the output 11a or 11b. For example, the output 11a or 11b is 1 when the number is odd.
In this embodiment, a simple flip-flop is provided, and when the flip-flop is set, an output is generated at 111, and when it is reset, an output is generated at 11b. When a signal is generated at the counter output 11a, the IPL control circuit 300a is activated and the IPL control circuit 300a is activated.
It initializes the O device 500&, sends out the I10 device number, and transfers the data stored in the IO device 500a to the storage device 200a under the control of the PL control circuit. Note that data refers to programs required when starting up the system.

An IPL operation is performed on the storage device 200 through the path of the IPL control circuit 300a and the IO device 5ooa, but the IPL operation failure detection circuit 400 detects the failure and starts the counter 100 with the output 40. When counter 100 is incremented, it produces a signal at output 11b, IPI.

The IPL operation is executed by the path of the control circuit 500b, the I/O device 500b, and the storage device 200. In a system in which the processing device, IPL control circuit, and IO device are duplicated in this way, both systems including the IPL control circuit can be automatically activated by operating either the IPL start switch 108 or 10b of both systems. It is possible to execute IPL operation.

〔Effect of the invention〕

According to the present invention, since restarting when an IPL operation fails can be automatically executed without manual operation 17, the system start-up time can be shortened and operations can be simplified.

[Brief explanation of the drawing]

The figure is a block diagram of one embodiment of the present invention. 10a, 10b: IPL start-up, 100: counter circuit, 11a111b: counter output, 200: storage device, 40: output,

Claims (1)

[Claims] 1. In a system in which the processing device and the input/output device are each duplicated, and the initial program can be loaded for each system, a counter is provided to count the number of times the initial program start button, etc. for each system is pressed, An initial program loading method characterized by controlling the initial program start signal to both systems by the output signal of a counter.