JPS6048776B2 - Combined calling method for programs in storage devices - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to a combined calling system for programs in a storage device.

(2) Background of the Technology As computer system functions expand, storage capacity needs to be expanded as well.

For example, in a 6-bit address space, a storage area of 64 words is expanded to an IM word. In this case, since it is advantageous to keep the 16-bit address space fixed, segment memory blocks are generally used for such expansion. In other words, a plurality of segment memory blocks are provided, which are alternately used with a common memory block, corresponding to a 16-bit address space, and any desired one of the segment memory blocks can be switched by a switching register. It is your choice. In this case, in any case, since the IM word must be covered with a 16-bit address space, access must be made through some basic software, ie, a monitor.
The present invention refers to this monitoring function. (3) Problems with the conventional technology As mentioned above, there is a method of selectively accessing multiple segment memory blocks as a method of expanding storage capacity, but the conventional general method is to expand the address space to 16 bits. We have also come up with five basic countermeasures.

However, assembler languages, linkage editors (linkers), etc. have traditionally had a fixed 16-bit structure, and as capacity increases, the 16-bit address space
Expansion requires fundamental improvements to these assembler languages. I have to say that this is an extremely inefficient method. Thus, the method of selecting a segment memory block using the switching register described above becomes effective.

By the way, when accessing these programs such as assembly language, most of them are stored in one segment memory block containing a group of programs used for one job. However, this is not always the case, and sometimes it is used in conjunction with programs in other segment memory blocks. In this case, a join call must be made to that other segmented memory block. As an example of such a case, a so-called server routine processing can be simply assumed. For this reason,
An efficient join call method is desired. (4) Purpose of the Invention In view of the above-mentioned circumstances, it is an object of the present invention to propose a monitoring function that can efficiently deal with the expansion of storage area, and in particular, a combined calling method for programs.

(5) Structure of the Invention In order to achieve the above object, the present invention includes a common memory block that includes a program attribute table and a control program section, and a link table section that includes a link table section at the beginning of each segment memory block. The table section stores each entry address of a program group within the segment memory block that may be jointly called from another segment memory block, divided for each entry point, and stores the program attribute table in the table section. The section is divided into entry numbers and indicates the segment memory block 3 lock and its entry point in which a program that may use the combined call method is stored, and the control program section refers to the program attribute table section and selects the desired one. The feature is that the program is called.

(6) Example 4 of the invention The present invention will be explained below with reference to the drawings.

FIG. 1 is a block diagram schematically showing a general method for expanding a storage device.

Incidentally, since a typical expansion method simply expands the address space, the method shown in this figure is quite advanced. For example, is the 16-bit fixed address space a symbol? Specifically, the address (0000
)...(X)...(FFFF) are assigned.

Here, a fixed address space (for example, corresponding to 64K words) is divided into a common memory block (CB) 11 and a floating segment memory block (SB) 12. The memory block 11 manages control functions common to the entire storage device. The memory block 12 is made floating to cope with expansion to IM words, for example.
Multiple segment memory blocks (SBI, SB2...
-SBn) Any one of 12-1, 12-2, . . . 12-n is alternatively allocated to the location of the memory block 12. The switching register 13 controls which segment memory block is used. Thus, while using a fixed address space, the storage area is apparently expanded from 64K words to IK words. However, behind this, there is the intervention of the monitor function/(basic software) mentioned above. By the way, normally when one job is executed, one segment memory block (12-1, 12-2...12-n)
It is sufficient to use the programs stored in .

Therefore, the monitoring function is relatively easy. However,
Since this may not be the case in all cases, it is absolutely necessary to implement a monitor function that can handle such special cases. This special case refers to a case where a combined call of a program is made across other segment memory blocks. FIG. 2 is a schematic diagram illustrating the combined call mode of the program. However, a mode in which two arbitrary segment memory blocks 12-I and l2-j are engaged with the common memory block 11 will be exemplified. In a combined call, program A (PRG-A), program B (PRG-B)
and Program C (PRG-C) may be linked (combined) and used as shown in the figure. The present invention can effectively deal with such combined calls. FIG. 3 is a schematic diagram showing an example of the structure of a link table section forming a part of the present invention.

In the figure, 31 is a link table section, which is formed, for example, at the beginning of the segment memory block SB. In the link table section 31, 1 is stored for each entry point EP.
, 2...k, and programs Xl, X2...X in the own segment memory block corresponding to each
k entry addresses are stored. 5. If necessary, the link table section may be provided within the common memory block 11.

The entry addresses of the program group to be stored in the link table section 31 do not have to be all the programs in the segment memory block.

As shown in FIG. 2, it is only necessary to register in the link table section only programs that have the possibility of receiving a joint call request from another memory block. Which one to register can be determined in advance by the designer of the system. 1. FIG. 4 is a schematic diagram showing an example of the structure of a program attribute table section forming another part of the present invention.

This program attribute table section is indicated by 41,
It is housed in a common memory block 11. Table part 4
1 is divided into 1, 22, .
Bi, SBj...SBk) and entry points (see Figure 3) that display the entry address in each segment memory block (EPI, EPm...EP
n) is registered. A control program section (51 in FIG. 5) is further accommodated in this common memory block 11, as will be described later. FIG. 5 is a block diagram schematically showing the configuration of a storage device to which the method of the present invention is applied.

In this figure, components that are the same as those already described are designated with the same reference numbers or symbols. Also, two arbitrary segment memory blocks are taken out and shown. An example of operation is shown below. ,1 Program Y is started.

Program Y includes CALL-PRG-X. CALL
-PRG. X indicates that program X has a combined call request. D The control program unit 51 investigates which segment memory block and which entry address the program x is located at.

In this investigation, the program attribute table section 41 is referred to, and from the entry number EN corresponding to the program X, it is learned that the program X is located at the entry point EPm in the segment memory block SBj. As a result, the segment memory block SBj is selected via the switching register 13. 3 From the entry point EPm obtained in 2 above, find the entry address of the program x,
This is determined based on the link table section 31.

Furthermore, by accessing with this address, the target program X can be called. Thus, it is possible to combine programs between different segment memory blocks.

(7) Effects of the Invention As explained above, according to the present invention, in a storage system in which the storage area is expanded by selectively switching and selecting a plurality of segment memory blocks, other segment memory Combined calls of programs that span blocks can be realized with almost no increase in hardware.

[Brief explanation of the drawing]

Fig. 1 is a block diagram illustrating a general method of expanding a storage device, Fig. 2 is a schematic diagram illustrating a combined calling mode of a program, and Fig. 3 is a link table that is a part of the present invention. FIG. 4 is a schematic diagram showing an example of the structure of the program attribute table section, which is another part of the present invention. FIG. 5 is a schematic diagram showing an example of the structure of the program attribute table section, which is another part of the present invention. FIG. 2 is a block diagram schematically showing the configuration of the device. 11... Common memory block, 12-1, 12
, -2...12-n...Segment memory drive top check, 13...Switching register, 31...
. . . Link table section, 41 . . . Program attribute table section, 51 . . . Control program section,
EP... Entry point, EN...
Entry number.

Claims (1)

[Claims] 1 has a common memory block and a plurality of segment memory blocks, and one of the plurality of segment memory blocks
In a storage device of a type in which one segment memory block is switched and selected by a switching register, a link table section is provided at the beginning of each segment memory block for a plurality of programs that may receive joint call requests from other segment memory blocks, Each entry address of the program is stored here for each entry point corresponding to each program, and the common memory block manages the link table section in each segment memory block in correspondence with the entry number, and stores the link table section in each segment memory block in correspondence with the entry number. a program attribute table section and a control program section storing segment memory blocks in which programs to be combined are placed and the corresponding entry points, and the control program section refers to the program attribute table section. A system for jointly calling programs in a storage device, characterized in that the segment memory block in which the program to be jointly called is located is selected via the switching register, and at the same time the program is called based on the referenced entry point.