JPS62274446A - Loading system for transient program in computer system - Google Patents

Abstract

PURPOSE:To shorten the time of transfer of a transient program from an auxiliary storage device to a main storage device when the transient program is executed, by preliminarily transferring the transient program from a low-speed access medium to a RAM as a high-speed access medium in the auxiliary storage device. CONSTITUTION:In case a transient program P3 is transferred to a main storage device 200 to execute the processing, a central controller 100 designates an address of a magnetic disc to an auxiliary storage device 300, namely, an auxiliary storage control circuit 310 and instructs the circuit 310 to transfer the program P3 to the main storage device 200. When receiving this transfer instruction, the auxiliary storage control circuit 310 discriminates the magnetic disc having this designated address. In accordance with this discrimination, the auxiliary storage control circuit 310 reads out the transient program P3 from a magnetic disc storage circuit 330 and transfers it to the main storage device 200 through an I/O bus 210. The similar operation is performed hereafter, and the auxiliary storage control circuit 310 reports the completion of transfer to the central controller 100. The central controller 100 starts the processing of the transient program P3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an operating system for a computer system, and more particularly to loading a non-resident program stored in an auxiliary storage device into a main storage device.

[Conventional technology]

Conventionally, non-resident programs stored in auxiliary storage devices, unlike programs resident in main storage devices, have the advantage that programs can be easily replaced even when the computer system is in operation. On the other hand, when the valve resident program is activated, the non-resident program is loaded from an auxiliary storage device such as a magnetic disk to the main storage device. After this loading is completed, the program becomes ready to run.

[Problem that the invention seeks to solve]

As mentioned above, the non-resident program is loaded into the main memory from an auxiliary storage device such as a magnetic disk, so there is a problem in that it takes time to load the program.

[Means for solving problems]

In the present invention, an auxiliary storage device having an auxiliary storage area made up of a storage medium is provided with a storage circuit (storage area) made up of a high-speed storage element such as a RAM, and a non-resident program is stored in the auxiliary storage area. I'm here.

The RAM is transferred from the auxiliary storage area to a storage area made up of high-speed storage elements such as RAM, and the predetermined non-resident program is transferred from the storage area made up of high-speed storage elements to the main storage. The feature is that it is made to look like this.

〔Example〕

The present invention will be explained below with reference to Examples.

Referring to FIG. 1, 1 an electronic metering leg device 1 to which the present invention is applied;
00 and the auxiliary storage device 300 are interconnected by an Ilo (input/output) path. The auxiliary storage device 300 includes an auxiliary storage control circuit 310, a RAM (random access memory) storage circuit 320. and a magnetic disk storage circuit 330. Then, these auxiliary storage control circuit 310, RAM storage circuit 320. and the magnetic disk storage circuit 330 are connected to each other by an internal path 311. The magnetic disk circuit 330 has a non-resident program PI.
, P2.

The non-resident programs PI, P2 and P3 are stored in a magnetic disk medium in the magnetic disk circuit 330 before the computer system is started up.
ing. Note that the non-resident program transferred from the magnetic disk circuit 330 to the RAM storage circuit 320 is referred to as P here.
1 and P2.

It is assumed that the non-resident programs P1 and P2 are registered in advance as management data. Further, all addresses specified when accessing the auxiliary storage device 300 from the central control device 100 have the same format.

If the address is below the specific address value, the RAM storage circuit 320\
If the access exceeds a specific address value, the access is to the magnetic disk storage circuit 330.

Referring also to FIGS. 2 and 3, when starting up the electronic computer system, the central controller 100
The non-resident programs P1 and P2 stored in the magnetic disk storage circuit 330 are transferred to the RAM storage circuit 32 via
Transfer to 0 (Stella 7'lO). Then, it is checked whether all scheduled non-resident programs have been transferred. That is, in this case the non-resident glogram
゛It is checked whether the waiting signals PI and P2 have been transferred to the RAM storage circuit 320 (step 20). If they have not been transferred, step 10 is performed again. On the other hand, if the transfer is completed, the transfer process at system startup is complete (
Step 30).

Next, for example, the non-resident program P1 is stored in the main memory 200.
When transferring data to auxiliary storage device 300. and executing processing, central control device 100 transfers data to auxiliary storage device 300. That is, it specifies the address on the RAM side used at the time of system startup to the auxiliary storage control circuit 310, and issues a transfer instruction to the main storage device 200. I
The auxiliary storage control circuit 310, which received this transfer instruction via the 10 path 210, determines that the address is on the RAM side (step 50). Based on this determination, the auxiliary storage control circuit 310 reads the non-resident program PI from the RAM storage circuit 320 and transfers it to the main storage via the I10 path 210 (step 60). Auxiliary storage control circuit 310
reports the completion of transfer of the non-resident program P1 to the main storage device 200 to the central controller 100 via the I10 bus 210 (Stella 7'80).

Upon receiving this report, the central control device 100 starts executing the non-resident program P1.

On the other hand, when transferring the non-resident program P3 to the main storage device 200 and executing the process, the central control device 100 specifies the address on the magnetic disk side to the auxiliary storage device 300, that is, the auxiliary storage control circuit 310, and Storage device 200
Issue transfer instructions to.

Upon receiving this transfer instruction, the auxiliary storage control circuit 310 determines that the address is on the magnetic disk side (step 5).
0). Based on this determination, the auxiliary storage control circuit 310 reads the non-resident program P3 from the magnetic disk storage circuit 330 and transfers it to the main storage device 200 via the I10 path 210 (step 70). Thereafter, in the same manner, the auxiliary storage control circuit 310 reports the completion of the transfer to the central control device 100. Then, the central control device 100 starts processing the non-resident program P3.

〔Effect of the invention〕

As explained above, in the present invention, the non-resident program is transferred in advance from the low-speed access medium to the RAM, which is the high-speed access medium, in the auxiliary storage device, so when the non-resident program is executed, it is transferred from the auxiliary storage device to the main memory device. This has the effect of shortening the transfer time for transferring non-resident programs. In addition.

When applied to a computer system, it is only necessary to replace the auxiliary storage device and change a part of the processing at system start-up.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the configuration of an embodiment of a computer system to which the present invention is applied, Fig. 2 is a diagram showing the processing flow of the central control unit at the time of system startup, and Fig. 3 is a diagram showing the processing flow of the central control unit at the time of system startup. FIG. 3 is a diagram showing a processing flow when transferring data from a storage device to main memory. 100... Central control unit, 200... Main storage device. 210...I10 path, 300...Auxiliary storage device,
310... Auxiliary storage control circuit, 311... Internal control path. 320...RAM storage circuit, 330...Magnetic disk storage circuit. Figure 2

Claims (1)

[Claims] 1. A computer system comprising a central processing unit, a main memory, a control circuit and an auxiliary memory circuit, and an auxiliary memory storing a non-resident program to be transferred to the main memory and processed. The auxiliary storage device is equipped with a RAM storage circuit, and the non-resident program is stored in the auxiliary storage circuit, and when the computer system is started up, based on instructions from the central processing unit,
transferring a non-resident program predetermined by the control circuit from the auxiliary storage circuit to the RAM storage circuit;
When the central processing unit accesses the auxiliary storage device, the control circuit controls the auxiliary storage circuit and the RA.
M memory circuit is identified by the address area to be accessed, and the predetermined non-resident program is transferred from the RAM memory circuit to the main memory. Load method.