JPS63228355A - System disk loading method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a system disk loading method for loading an initial program into a main storage device by operating an IPLROM built into a CPU.

[Conventional technology]

FIG. 3 is a block diagram showing the configuration of a service processor included in a conventional computer system disclosed in Japanese Patent Laid-Open No. 60-74063 and a computer system according to an embodiment of the present invention. In Figure 3, ■ is the CPU (central processing unit), 2 is the main storage device, 3 is the floppy disk device, 4 is the mini disk device, 5 is the CRT display device, 6 is the keyboard device, and 7 is built in the CPUI. m I P L ROM (Init
ial Program Loading Read 0
nly Memory). The floppy disk device 3 and the mini disk device 4 are each set with a floppy disk as a system disk (in this case, a floppy medium) and a mini disk.

The IPLROM 7 stores a program for reading an initial program from the system disk device into a predetermined location in the main storage device 2.

FIG. 4 is a cylinder configuration diagram of a floppy disk employing the conventional system disk loading method. In Figure 4, the cylinder configuration in the volume is 1
It consists of index cylinders 21, for example 74 data cylinders 22, and two alternate cylinders 23,24. The index cylinder 21 is an area with cylinder number ro OJ, and stores information regarding the entire volume, and also stores information regarding alternate cylinders 23 and 24. The data cylinder 22 is an area with cylinder numbers "01" to "74", and stores user data, and the contents of the data to be registered and the code to be used are arbitrary to the user. The replacement cylinders 23 and 24 are areas with cylinder numbers 75 and 76, and are used as replacement cylinders if a defective cylinder exists. Note that the access range by software is based on the cylinder number of the logical cylinder.
00” to “74”.

Next, the operation when the IPLROM is activated will be explained with reference to the flowchart shown in FIG.

First, an initial diagnosis of the device is performed (step S1), and if there is an error, a lamp is turned on and a wait is performed in step S2.
S3), if there is no error, floppy disk device 3
A ready check is performed (steps S2, 34). When it is determined that the floppy disk device 3 is ready in step S4, the process of step S6 is performed, and when it is determined that the floppy disk device 3 is not ready, the process is performed in step S5.
Process. In step S5, it is checked whether or not timeout (4 seconds has elapsed) is reached, and if rYESJ, step S5 is performed.
If the answer is "NO", the process returns to step S4.

In step S6, Return To Zero
Execute the command, move to step S7, check whether the command has ended normally, and if rYESJ, proceed to step S9; if "NO", proceed to step S.
8. In step S8, timeout (
1 second has elapsed), and if rYESJ, perform the process in step S19, and if rNOJ, perform the process in step S7.
Return to processing. In step S9, a volume label read command is executed to the floppy disk device 3, and the process moves to step SIO. Step S
In IO, it is checked whether the execution of the read command has ended normally. If rYESJ, the process of step S12 is performed, and if rNOJ, the process of step Sll is performed.

In step 311, it is checked whether a timeout (1 second has elapsed) has elapsed, and if YES, the process moves to step S19 to turn on the lamp and wait, and if rNOJ, the process returns to step S10. In step S12, the specified format floppy is checked to see if a specified password is set in the volume number of the read volume label. If rYESJ, step S1
Step 3 is performed, and if rNOJ is determined, step 314 is performed.

In step S13, a read command for the IPL file (initial program) is executed to the floppy disk device 3, and the process moves to step S15. In step S14, the IPL is applied to the mini disk device 4.
Execute the file read command and step S15
Proceed to processing.

In step S15, it is checked whether the execution of the read command has ended normally, and if rYEsJ, step S15 is performed.
Step S17 is performed, and when rNOJ is determined, step S16 is performed. In step S16, it is checked whether a timeout (one second has elapsed) has elapsed, and if rYEsJ, the process moves to step S19 to turn on the lamp and wait, and if "NO", the process returns to step S15. In step 317, the program state word is IPSW (Initia
l ProgramStatus Word) to C
P S W (Current Program Sta.
tus Word) and step 31.
Move to B. In step 518, CPU1 is
is activated, and the processing of the IPLROM 7 is completed.

Incidentally, FIG. 6 is a diagram showing an example of the structure of the volume label read by the process of step S9. 6th
In the figure, a volume number which is an arbitrary volume ID code designated by the user is set in a field named volume serial number of field number F3.

[Problem that the invention seeks to solve]

Since the conventional system disk Rondo method is configured as described above, the choice of whether to use the floppy disk or mini disk as the system disk, both of which are in the ready state, depends on the volume of the floppy disk.・There was a problem that the label had to be rewritten, so the degree of freedom of selection was relatively small, and volume label management was required.

This invention was made to solve the above-mentioned problems, and selects a system disk without rewriting the volume label of the floppy disk. Increase flexibility in selecting load media and increase volume
The purpose of this invention is to provide a system disk loading method that eliminates the need for label management.

[Means for solving problems]

The system disk loading method according to the present invention writes the load medium specification information 22a in the data cylinder 22 of the floppy disk, has the cylinder number in the file label, and stores the data in the memory (IPLROM7).
When reading the floppy disk, it selects a floppy disk or a mini disk according to the instructions of the load medium specification information 22a, and reads the initial program on the selected disk to a predetermined location in the main storage device 2. That is.

[Effect]

When the memory (I PLROM 7) performs the process of reading the floppy medium, the load medium specification information 22a is read out, and if the load medium specification information 22a specifies a floppy disk, the initial program is written to the floppy disk. 2 to a predetermined location in the main storage device 2, and load medium specification information 2
If 2a specifies a mini disk, the initial program is transferred from that mini disk to main storage device 2.
Performs the process of reading the file to the specified location. In addition, initials
When it becomes necessary to change the load medium for reading a program, the selection of the load medium can be changed by rewriting the load medium specification information 22a in the data cylinder 22 without rewriting the volume label of the floppy disk. Ru.

[Embodiments of the invention]

FIG. 1 shows a system disk according to an embodiment of the present invention.
FIG. 2 is a flow chart for explaining the operation of this system disk loading method, and FIG. 3 is a cylinder configuration diagram of a floppy disk that adopts the loading method. FIG. 2 is a block diagram showing the configuration of a service processor.

Components in FIG. 1 that correspond to the components shown in FIG. 4 are given the same reference numerals, and in FIG. 2, those that correspond to the processes shown in FIG. Descriptions of each will be omitted.

A feature of one embodiment of the present invention is that when the IPLROM 7 is started by pressing, for example, the rPOWER-ONJ key or the r1MPLJ key provided on the keyboard 6 of the service processor shown in FIG. After diagnostics and initial hardware settings, the system
Determine the disk and perform IPL from the system disk device.
This is to read a file (initial program) into a predetermined location in the main storage device 2. That is,
In this embodiment, the load medium specification information is written in the data cylinder of the floppy medium, and the cylinder number is included in the file label. - The feature is that a disk or mini disk is selected and an IPL file is read from the selected disk into a predetermined location in the main storage device 2.

In the above initial diagnosis, li and tJ production tests are performed on the CPU, which is the hardware of the service processor, the registers of the main memory 2, the ECC function of the main memory 2, and the write/read conveyor of the main memory 2. Also, the method for determining the system disk is to use a floppy disk.
A readiness check of the disk device 3 is performed, the load medium designation information 22a shown in FIG. 1 is read out, and the specified load medium is checked. A floppy disk becomes a system disk when the floppy disk is installed in the floppy disk device 3 and is in a ready state, and the floppy disk is specified by the load medium specification information 22a. Also, if the mini disk becomes the system disk, the floppy
This is when a floppy disk is not installed in the disk device 3, or when a mini disk is specified in the load medium specification information 22a.

It consists of a cylinder 21, 74 data cylinders 22 and two alternate cylinders 23,24. The index cylinder 21 is an area with cylinder number ro O'', and stores information regarding the entire volume, and also stores information regarding alternate cylinders 23 and 24. The data cylinder 22 is an area with cylinder numbers 01 to 74,
The user's data is stored, and the contents of the data to be registered and the code to be used are at the discretion of the user. This data cylinder 22 also contains load medium specification information 2, which is a feature of the present invention.
2a is written in the area of cylinder number n. In addition, the load medium specification information label (file label) of the index cylinder 21 includes load medium specification information 22a.
The cylinder number n having the same name is entered so that the load medium designation information 22a can be read out.

In FIG. 2, steps 81 to s8, step SIO
, Sll and steps SL3 to S19(7) are similar to the conventional method. In step S9a, the load medium specification information of the data cylinder 22 is determined by the load medium specification information label of the floppy disk! [! 22a, and this load medium specification information 2 is read in step SIO.
Perform check 2a.

That is, when the load medium specification information 22a specifies the floppy disk device 3, the process moves to step S13, and when it does not, the process moves to step S14. Since the subsequent steps have been explained in the related art, the description thereof will be omitted.

Note that when it becomes necessary to change the load medium for reading the initial program, the load medium can be changed by rewriting the load medium specification information 22a in the data cylinder 22 of the floppy disk.

〔Effect of the invention〕

As described above, according to the present invention, the load medium specification information is written in the data cylinder of the floppy disk, the cylinder number is included in the file label, and when the memory reads the floppy disk, the load medium specification information is written in the data cylinder of the floppy disk. Floppy disk or mini disk according to the specified information
Since the configuration is configured to select a disk and read the initial program from the selected disk to a specified location in the main storage device, it is possible to select the system disk without having to rewrite the volume label of the floppy disk. This increases the degree of freedom in selecting a load medium and eliminates the need to manage volume labels.

[Brief explanation of the drawing]

FIG. 1 is a cylinder configuration diagram of a floppy disk employing a system disk loading method according to an embodiment of the present invention, and FIG. 2 is a diagram showing the system disk loading method of this embodiment.
FIG. 3 is a block diagram showing the configuration of a service processor included in a conventional computer system and an embodiment of the present invention, and FIG. 4 is a flowchart for explaining the operation of the loading method. A cylinder configuration diagram of a floppy disk adopting the loading method. FIG. 5 is a flowchart for explaining the operation of the conventional system disk loading method. FIG. 6 is led by the process of step S9 in FIG. 5. It is a figure which shows the example of a structure of a volume and a label. 1...Central processing unit, 2...Main storage device, 3...
Floppy disk device, 4...Mini disk device, 22.Data cylinder, 22a...Load medium specification information. Agent Masuo Oiwa (2 people) Figure 1 (Cylinder (No. 1) Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] Floppy disk device, mini disk device,
Each of the main storage devices includes a main storage device, and a central processing unit having a built-in memory storing a program for reading an initial program from either the floppy disk device or the mini disk device into a predetermined location of the main storage device. In a computer system, load medium specification information is written in the data cylinder of a floppy disk, the cylinder number is included in the file label, and when the memory reads the floppy disk, the load medium specification information is written in the data cylinder of a floppy disk. A system disk loading method characterized in that the floppy disk or mini disk is selected by an instruction, and the initial program is read from the selected disk to a predetermined location in the main storage device.