JPS62226356A - Initial program loading system - Google Patents

Abstract

PURPOSE:To make initial program loading selectively from plural external storage devices by adding the precedure for judging specific key input in an ROM in which procedures for executing initial program loading are stored. CONSTITUTION:At the time of power source making, a keyboard unit 4, a display unit 5 and plural external storage devices such as a floppy disk unit 6, a hard disk unit 7 etc. are connected as peripheral equipments to an ROM3 in which a program that executes initial program loading. Initial program loading is operation that reads out a system program recorded beforehand in an external storage device such as the floppy disk unit 6 or hard disk unit unit 7 etc. and writes in a main memory 2 and prepares for program execution. A procedure for executing and indicating is stored in the ROM3 as a program, and a procedure for judging specific key input is stored in the ROM3.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to an initial program loading method suitable for use in a data processing device such as a personal computer that has both a floppy disk device and a hard disk device. .

(Prior Art) Loading of the initial program in the data processing device has conventionally been carried out in the following manner.

ill Performed from the floppy disk device, no hard disk device involved.

(2) In principle, it is performed from the floppy disk device, but if a floppy disk is not inserted, it is performed from the hard disk device.

In any of the above cases, if the initial program is stored in the floppy disk device and a floppy disk other than the system disk is inserted, an error will be displayed and the system will stop, and recovery operations will be performed when the power is turned on again with operator intervention. This is common.

(Problem to be solved by the invention) However, in recent years, the time required to start up a system has been shortened, starting with a hard disk drive! Requests for Log 2 Mlord have been increasing. However, with conventional methods, this is not possible, or even if it is possible, there is often a 70-speed disk other than the system disk in the floppy disk device, which is inconvenient as the system often stops.

Sometimes, when starting up a system in the absence of an operator, such as when starting up the power supply, it is not possible to set a floppy disk (to avoid errors), and it is necessary to use a floppy disk. There was a significant problem in that it could not be started.

On the other hand, some devices have a dedicated changeover switch that instructs which device to load the initial program from, thereby avoiding the above problem, but with this method, The drawback is that the hardware cost increases due to the changeover switch. The present invention has been made in view of this, and it is an object of the present invention to provide an initial program loading method that eliminates the above-mentioned problems without adding special hardware.

[Configuration of the Invention (Means for Solving the Problems)] In order to solve the above-mentioned problems, the present invention further includes a specific key in the ROM in which the procedure for executing the initial program load is stored. A procedure for determining the input is added to detect the occurrence of a specific key input from the keyboard, and based on this, the initial program roll is performed selectively from multiple external storage devices. .

(Function) In accordance with the above-mentioned method, the program stored in the ROM first checks key input, and unless otherwise specified, loads the companion system program stored in the node disk device into the main memory. For example, when a predetermined combination of friend keys is detected, the initial program is loaded from the floppy disk device. This makes it possible to selectively load initial programs from a plurality of external storage devices based on specifications from the standard keyboard without adding any special hardware.

(Example) Hereinafter, an example of the present invention will be described in detail using the drawings. FIG. 1 is a block diagram showing an example of the configuration of a data processing device to which the present invention is applied.

In the figure, 1 is a CPU that is the control center of the system.

Reference numeral 2 is a main memory IJ, and 3 is a ROM in which is stored a program for executing an initial load of GLODRAM when the power is turned on, and these constitute the main body of the data processing apparatus. A keyboard device 4, a display device f5, and a plurality of external storage devices such as a floppy disk device f6 and a hard disk device @y are connected to this main body as peripheral devices.

Note that the initial program load here refers to reading out a system program previously recorded in an external storage device such as a floppy disk drive It, 6 or a hard disk drive 7, and loading it into the main memory 2 to prepare for program execution when the power is turned on. Refers to the action performed. A procedure for instructing this execution is stored as a program in the ROM 3, and in the present invention, the ROM 3 further includes a companion procedure for determining a specific key input. The program structure stored in the ROM S is shown as a flowchart in Figure 2.

Hereinafter, the operation of the embodiment of the present invention will be explained in detail. First, when the power is turned on, the CPU 1 stores data in the ROM.
'L;l' (starts the program and starts initial program loading. Check the key input.Normally, no key is pressed, so the ROM 9 starts the program indicated by 32, reads the system program stored in the hard disk drive 2, and writes it to the main memory 2.i.e. , unless otherwise specified, the initial GLODARAM load is executed from the hard disk drive rt7.

On the other hand, if it is desired to load the initial program from the floppy disk device t6, a predetermined key combination, for example, a specific numeric key combination, is pressed immediately after '11 is turned on. The program in the ROM 3 determines in the determination unit 31 that this key combination has been pressed, starts the program indicated by 33, reads out the system program stored in the floppy disk drive 6, and stores the system program in the main memory. 2
By writing to , the entire initial program load from the 70 disk drive 6 is executed.

[Effects of the Invention] As explained above, according to the present invention, any external storage device connected to the system can be accessed by inputting keys from the standard keyboard without adding any special hardware. You can perform an initial program load from here.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an example of the configuration of a data processing device to which the present invention is applied, and FIG. 2 is a flowchart showing the program structure of the ROM shown in FIG. 1...CPU, 2...Main memory, 3...ROM,
4... Keyboard, 6... Floppy disk device, 7... Hard disk device. Figure 1 Figure 2

Claims (1)

[Claims] In a data processing system having a ROM in the main body in which a procedure for executing an initial program load is stored in the form of a program when the power is turned on, and a plurality of external memories as peripheral devices, the ROM further includes: There is a built-in procedure for determining the presence or absence of a predetermined key input, and this procedure determines the key input from the keyboard connected to the system, and according to the content, the key input is determined from each of the multiple external memories. An initial program load method characterized by controlling initial program load.