JPS581257A - Input and output processor - Google Patents

Abstract

PURPOSE:To improve the utilizing efficiency of an input and output processor, by executing other input and output controls while a disc is turning when a one- body input and output processor executes a plurality of controls. CONSTITUTION:A CPU2 executing a program and a disc control interface 3 having a device detecting the disc turning position are commonly connected via a bus. The CPU2 gives control to a control program at the read or write operation to a disc based on a disc control program, when the difference between the rotating position and the objective position of the disc is greater than a preset value. The CPU2 receiving this checks the presence/absence of instruction or request to other input and output processors based on the control program and gives control to the program to be executed next.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an input/output processor K11l-f for controlling input/output ill of an electronic computer system.

Although it is small, My/P Library has become extremely popular due to its excellent performance, and within one system the number of JOs - 1
It is used for IXtF. By the way, there are various types of waste information in electronic calculations. Continuing on, the input/output device as a man-machine interface is equipped with an input/output controller to control the input/output, and the My7-Boossor is used for this input/output controller. Teru.

Generally, a microprocessor is used exclusively for performing one type of input/output control; in this case, the number of microprocessors used per system is proportional to the number of types of control functions. On the other hand, two or more types of control contents (or input/output car positions) are used together in the ill processor. However, in this case, although the cost is lower, it is disadvantageous in terms of performance.

In other words, when performing multiple controls including disk memory control in I\1, there is a frame.

Due to the structure of disk memory, an operation called rotation is required to access it. Therefore, during the target information read or write operation (hereinafter referred to as RIAD/WRI'rie operation) ilf&11, all other controls are forced to wait, resulting in dead time.

Therefore, the present invention provides an input/output system that improves utilization efficiency and reduces costs by making it possible to execute other input/output controls during the disk 01 wait time when multiple controls are executed by a single input/output processor. The purpose is to provide a computer processor.

The present invention will be described in detail below based on an illustrative embodiment. 111th I/O processor according to the present invention! An example is shown in a block diagram.

First, although the present invention assumes sP%nτ, the input/output processor is II! On the other hand, there are multiple input/output controllers including disk memory. However, to simplify the explanation, each input/output device is not shown.

In 1N111, control memory 1 is a control program A that is used to comprehensively control the entire system built into Iideka Kabu-Setuna.

Disk controller for controlling distal screen
) Role program B, human output control program C to N for controlling other input/output devices O
is stored. Each of these products OA, B, C-
---The details of N will be described later.

We met. Each product, B, C---axis N is CPU2
executed by The control memory 1 has a working memory (including a data buffer) in addition to the memories for the programs 9m, c...N.

Dist interface control visit 5stt external lI
Instructions between Disk Me 4q and Iide Kapro Nanatsuna,
It controls the sending and receiving of data, etc. It was piped.

This disk interface control unit 34 has a rotation detecting lid for detecting the rotational position of the disc. Code 4.1...Mr.

Commands between other input/output at and the input/output booster of the present invention,
It controls the transmission and reception of information such as data, and corresponds to the number of input/output devices (excluding disk memory) to be controlled.

Each of the above devices is connected to the system path line 6.
Furthermore, reference numeral 7 indicates an upper system interface control section.

Next, further details of the input/output interface of the present invention □II
Explaining the IPs structure and its OVA work - Part 2
The main part of the operation flowchart is shown in the figure. A and B shown in the second WJ are the same as the quadrogram shown in the N1 diagram.

When a host system (not shown) issues a disk access command to the input/output processor, this disk access command is sent to the CPU! is input. Then, the CPU 2 executes the contents of the disk control program BO stored in the control memory l.

Here, the disk access command is RIAD, /WRI'
In the case of rl operation, there is a waiting time at t when a predetermined position on the disk surface is detected, as described above. At this time, the data controller controller 53
In this case, the first rotation position detection 11fK-Dimetsu 0311 O-excited transition stirrup is detected in the Tistain Tough Ace Control Unit 3, and the detected current position and target position are compared to find the difference.

When the difference is smaller than the general sum value, the disk processing is performed. On the other hand, when there is a large problem, the disk processing is temporarily interrupted and the program is transferred to the general program. Here, the preset values are added based on values that can be operated immediately and that require less waiting time.

The rotational position detection iut is configured as follows, for example:
Usually, an index smarter is attached to a disk, and this index smarter! A counter is provided which is cleared at the top and the counter is incremented by a tie-setting pulse generated at each rotation time interval corresponding to an access on the disk surface. Then, by using this count value in a control program, the current rotational position can be determined. As another example, whenever a RICAD/VRITIC command for a disk comes, the current O1! ? It is also possible to read 1-transition love from the 1-au disc surface. For this purpose, it is sufficient to provide the cobblestone hardware in advance in the interface control s3, and the program may also be saved in the memory 20K.

In the manner described above, the program is transferred from the disk control program B to the general program A. The supervisory program then performs other input/output operations such as 4. to····
・I command for l ★t is the input/output i if there is a request
iI Stirrup 4.5... Decide whether to process the Otori, the Goose, or the disk again. Since control is executed according to the determination result, the priority of the data processing is highest in any case.

It should be noted that the other input/output devices 4 and 5 = * may of course be disk memories, and the disk memory may contain high-speed, large-capacity data storage (111 pairs, cartridge type is not recommended).
Alternatively, it is also possible to use either or both of floppy disk memories.

As described above, according to the present invention, when performing a plurality of controls using one processor, the distal oiis
@Ki effectively utilizes spare time! Therefore, processing S
Improve performance and reduce costs.

[Brief explanation of the drawing]

Figure 11141 shows 11! of the input/output processor according to the present invention.
A plotter diagram showing the operation and a flowchart of the operation are shown in FIG. l...Control memory, 2...CPU, 3...
・Disk interface control It, 4,5
. . . 1. Interface control unit for other input/output locations, A.. General program, B.. Disc controller) roll program, C to N.. Control programs for other input/output car locations. Applicant's agent Kiyoshi Inomata

Claims (1)

[Claims] Multiple input/output methods including disk memory control
It is an input/output processor that controls the ? /J system control program that controls the system, disk controller that controls the disk memory
- a control memory in which input/output control modules for controlling the stirrup and other input/outputs are stored; a CPU that executes the program; A disk control interface having a device for detecting the disk position of the disk drive 41 is jointly connected to a common KII by a bus, and the CPU controls whether the disk continues or writes 1a based on the disk control program. The rotational position of the disk is known through the Kflikiface, and when the difference between the current rotational position of the disk and the target position is greater than the preset t value, the above-mentioned CPtj passes control to the control program and receives the command.Based on the control program, CPtj sends commands tx to other O input/output devices to determine whether there is a request or not, and then controls the program to be performed in the first place. An input/output processor whose function is to pass