JPS63255752A - Initial program loading system - Google Patents

Abstract

PURPOSE:To simplify the initial program load processing, by loading an initial program from an input/output device after this device is set to the processing acceptable state at the time of requesting the execution of initial program load. CONSTITUTION:When a control command of initial program load execution request is given from a command input device 7 to a central processing unit 3, it is discriminated by the central processing unit 3 whether an input/output device 6 is in the processing acceptable state or not. If it is in the processing acceptable state, initial program load from the input/output device 6 to a main storage device 2 is executed, and a program and data stored in the input/output device 6 are stored in the main storage device 2. If the device 6 is in the processing unacceptable state, the central processing unit 3 waits for the input/ output device 6 to enter into the processing acceptable state; and when it enters into the processing acceptable state, this state is recognized by the interrupt processing and initial program load from the input/output device 6 to the main storage device 2 is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an initial program loading method in an electronic computer system.

[Conventional technology]

FIG. 3 is a block diagram showing the configuration of a computer system that employs the conventional initial program loading method. 1 is a computer main body, and this computer main body 1 includes a main memory that stores information necessary for operation (programs and data executed by the central processing unit 3, data read and written from the input/output device 6, etc.). 2, a central processing unit 3 that performs predetermined calculations and control (program execution, interrupt processing, etc.), and a data transfer device 4 that transfers data to an input/output control device 5 and the like external to the main body.

The input/output control device 5 controls the input/output device 6, and the input/output device 6 has a storage medium storing information to be stored in the main storage device 2 (data to be stored at the time of initial program loading). It performs input and output. The command input device 7 is used to manually input control commands to the central processing unit 3 of the computer main body 1. The central processing unit 3 is equipped with an initial program load processing section (hereinafter referred to as an IPI processing section) 8 that performs processing for loading an initial program from the input/output device 6.

Next, the operation of this conventional initial program loading method will be explained with reference to the flowchart shown in FIG. When an operator gives a control command to the computer main body 1 from the command input device 7 to load an initial program, the central processing unit 3 uses the TPL processing unit 8 to transfer the data to the device via the data transfer device 4 and the human output control device 5. It is determined whether the input/output device 6 is in a ready state (a state in which processing can be accepted) (step SL).

S2). If it is in the ready state, the central processing unit 3
executes an initial program load process to load the program and data stored in the storage medium of the input/output device 6 to the main memory W2 (step S3). The above-mentioned initial program load (IPL) is when the program to be executed is not yet stored in the main storage device 2 in the initial state of the computer system. This is the process of storing programs and data from the input/output device 6 to the main storage device 2 using the functions. After the processing in step S3, the IPL processing unit 8 of the central processing unit 3 determines whether or not the initial program loading has been completed normally (step S4). If the initial program loading has been completed normally, the control command is completed; The program load failure process is performed (step S5), and the control command is ended.

On the other hand, if it is determined in step S2 that the input/output device 6 is in the not-ready state B (processing cannot be accepted), the process moves to step s5, performs initial program load failure processing, and ends the control command. .

[Problem that the invention seeks to solve]

As explained above, in the conventional initial program load method, the control command for initial program loading must be executed after confirming that the input/output device 6 is ready for processing. When executing the initial program load, etc., the time required for power-on processing depends on the system and the hardware of the input/output device 6, so check the timing when the corresponding input/output device 6 becomes ready for processing. Therefore, the automatic initial program loading process becomes complicated.
There were problems such as the need for a means to know the status of the system.

This invention was made to solve the above-mentioned problems, and it is possible to issue a control command for requesting initial program loading regardless of the status of the input/output device, and to perform initial program loading without depending on the system or device. It is an object of the present invention to provide an initial program loading method that can easily perform program loading processing.

[Means for solving problems]

In the initial program load method according to the present invention, when a control command for requesting initial program load execution is given from the command input device 7 to the central processing unit 3, the central processing unit 3 changes the state of the input/output device 6 to a state ready for processing. If it is in a state where processing can be accepted, the input/output device 6
The initial program is loaded into the main storage device 2 from , and if it is in a state where it cannot accept processing, it waits until the state of the input/output device 6 becomes a state where it can accept processing, and when it becomes able to accept processing, it interrupts that state by interrupt processing. The program is recognized and the initial program is loaded from the input/output device 6 to the main storage device 2.

[Effect]

In response to the control command from the command input device 7, the central processing unit 3 determines whether the input/output device 6 is ready for processing. Therefore, if the process is ready, an initial program load is executed, and the program and data stored in the input/output device 6 are stored in the main storage device 2. On the other hand, if the input/output device 6 is in a state in which it cannot accept processing, it waits until it becomes in a state in which it can accept processing, and when it becomes in a state in which it can accept processing, an interrupt processing occurs, and by the interrupt processing, the central processing unit 3 loads the above-mentioned initial program. Start execution.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a block diagram showing the configuration of a computer system employing an initial program loading method according to an embodiment of the present invention. In FIG. 1, components corresponding to those shown in FIG. 3 are given the same reference numerals, and their explanations will be omitted. Reference numeral 21 shown in FIG. 1 indicates a ready state for notifying the IPL processing section 8 of the central processing unit 3 via the input/output control device 5 and data transfer device 4 that the state of the input/output device 6 has become ready. It is a transmission mechanism.

Next, the operation of this embodiment will be explained with reference to the flowchart shown in FIG. In FIG. 2, parts corresponding to the processes shown in FIG. 4 are given the same reference numerals. When an operator issues a control command to request initial program load execution from the command input device 7 to the computer main body 1, the central processing unit 3 performs input/output processing via the data transfer device 4 and the input/output control device 5 by the IPL processing section 8. It is determined whether the device 6 is in a ready state (steps Sl, S2).

If it is in the ready state, the central processing unit 3 executes an initial program load process of loading the program and data stored in the storage medium of the input/output device 6 into the main storage device 2 (step 33). After that, the TPI of the central processing unit 3 and the processing unit 8 determine whether or not the initial program load has ended normally (step S4). If it has ended normally, the control command is ended, and if not, the initial program load has failed. Perform success processing (step S5)
), control of initial program rotation execution request? End the ff1l command.

On the other hand, if it is determined in step S2 that the state of the input/output device 6 is not ready, step S6
Then, the IPL processing section 8 of the central processing unit 3 waits for the input/output device 6 to become ready. That is, the TPL processing section 8 of the central processing unit 3 waits for a ready interrupt, and when the input/output device 6 becomes ready, the ready transmission mechanism 21 notifies the IPL processing section 8 of the central processing unit 3 of this ready state. As a result, the IPL processing unit 8 of the central processing unit 3 recognizes that the input/output device 6 is in the ready state, moves to step S3, performs initial program loading from the input/output device 6 to the main storage device 2, and thereafter Step S4. S5
The control command for the initial program load execution request is terminated.

In the above embodiment, the central processing unit 3. A ready transmission mechanism 21 is provided to perform ready state interrupt processing separately from the normal interrupt processing of the data transfer device 4, but depending on the control of the central processing unit 3, normal interrupt processing and ready state interrupt processing can be performed. You can also do this.

[Effects of the Invention] As described above, according to the present invention, when the control command for requesting initial program load execution is given from the command input device to the central processing unit, the central processing unit changes the state of the input/output device to be ready for processing. If it is in a state where processing can be accepted, the initial program is loaded from the input/output device to the above j12 device, and if it is in a state where processing cannot be accepted, the state of the input/output device is in a state where processing can be accepted. When the state becomes ready for processing, the state is recognized by interrupt processing and the initial program is loaded from the input/output device to the main storage. It is possible to issue a control command for requesting program load execution, which has the effect of simplifying the initial program load process without depending on the system or device. This is effective when performing an initial program load, etc.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a computer system that employs an initial program load method according to an embodiment of the present invention, FIG. 2 is a flowchart for explaining the operation of this embodiment, and FIG. 3 is a conventional Block diagram showing the configuration of a computer system adopting the initial program load method, No. 4
The figure is a flowchart for explaining the operation of this conventional example. ■...Computer body, 2...Main storage, 3...Central processing unit, 6...I/O device, 7...Command input device, 8...IPL processing section, 21...・Ready transmission mechanism. Agent Masuo Oiwa (and 2 others) Figure 1, Figure 2, Figure 3

Claims (1)

[Claims] A central processing unit that performs predetermined calculations and control, a main storage device that stores information necessary for operation, an input/output device that has a storage medium that stores information stored in this main storage device, and a central processing unit that sends control commands to the central processing unit. In a computer system equipped with a command input device for inputting input to a processing device, when a control command for an initial program load execution request is given from the command input device to the central processing unit, the central processing device It is determined whether the output device is in a state where processing can be accepted, and if it is in a state where processing can be accepted, the initial program is loaded from the input/output device to the main storage device, and if it is not in a state where processing can be accepted, the input/output device is loaded. The present invention is characterized by waiting for the state of the output device to become ready for processing, and when the state becomes ready for processing, the state is recognized by interrupt processing, and an initial program is loaded from the input/output device to the main storage device. Initial program loading method.