JPS6385953A - Input/output controller - Google Patents

Abstract

PURPOSE:To improve the using efficiency and the processing speed of a device, by performing the input/output control of plural input/output control parts so as to be operated in parallel by a microprocessor apparently. CONSTITUTION:Either the input/output control parts a1-an corresponding to a start-up instruction is operated at every issuing of the start-up instruction from a center (b) by the control of the microprocessor. In executing serial plural processing steps in order by a start-up instruction executing means (d), an interruption executing means (e) can receive an interruption acceptance, and decides whether an interruption processing after the reception of the interruption acceptance should be performed by a hardware, or a software. The updating of a bit of information is performed by an information updating means (f) after completing execution, or before starting the execution, and the input/ output control are performed in parallel apparently on the plural input/output control parts a1-an by hardware control and program control.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an improvement of an input/output control device that performs various input/output controls in an information processing device.

(Prior Art) As is well known, an information processing device to which this type of input/output control device is applied has one main bus 10 and a central processing control unit 11. Main storage device 1
2, various input/output devices such as a magnetic disk control device 13 and an input/output control device 14 are connected. Then, when the command from the central processing control 21I device 11 corresponds to the magnetic disk control device 13, the magnetic disk control device 13 performs input/output control of the magnetic disk device 15, and the startup command is sent to the input/output control device 14.
In response to this, the input/output control 11 device 14 performs input/output 1li1121I of the line printer device 16 or card reading device 17.

However, when performing input/output control for devices that do not have a complex control system, configuring each device individually as a single board reduces the amount of hardware involved in each device. There will be a lot of waste on top.

Therefore, even in the past, when the amount of hardware for each device is small and each device has independent functions, it is possible to control multiple valves together on one board. We adopted a configuration in which program control is performed by multiple microprocessors.

However, in the conventional configuration using program control using a microprocessor, a plurality of devices operate in series, resulting in poor device usage efficiency.

(Problem to be solved by the invention) As mentioned above, even in the past, ? If the amount of hardware of the device with one loss is small and each of the devices has independent functions, the configuration is such that each device can be independently input/output controlled by a single microprocessor program t111111. However, each device operates in series, resulting in poor device usage efficiency, making it difficult to improve processing speed.

The present invention has been made in view of the above circumstances, and its purpose is to provide an input/output control device for use in an information processing device so that a plurality of input/output control units can apparently operate in parallel using a single microprocessor. An object of the present invention is to provide an input/output control device capable of controlling input/output I.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention includes a plurality of input/output control units, and responds to the activation command every time the activation command is issued from the center. The input/output control unit is an input/output control device operated under microprocessor control, and the input/output processing to be executed is subdivided into a plurality of serial processing steps and executed by a single activation command from the center. and a startup instruction execution means capable of accepting interrupts while sequentially executing a plurality of serial processing steps by the startup instruction execution means, and performing interrupt processing after the processing step in which the interrupt is accepted by hardware. or an interrupt execution means that appropriately selects and executes which program to execute, and an information update of a storage means in which control information of each of the execution means is stored after the execution of each of the execution means ends or after the execution starts. It is characterized in that it has an information update means for updating information beforehand.

(Operation) FIG. 1 is a functional block diagram schematically showing the input/output control device of the present invention.

In the present invention, as shown in FIG. 1, a plurality of input/output control units a1 to an are provided, and each input/output control unit a1
-an, each time a start command is issued from center b, any one of the input/output control units al-an corresponding to the start command is operated under microprocessor control. This allows each input and output υ! Each device 01 corresponding to Gobe al~an
-an will be driven.

At this time, the start-up command execution means d refers to the control information in the storage means g and subdivides the input/output processing to be executed by one start-up command from the center b into a plurality of serial processing steps. do.

Furthermore, while the startup instruction execution means d is executing a plurality of serial processing steps in sequence, the interrupt execution means e is capable of accepting interrupts, and the interrupt execution means e is capable of accepting interrupts and processing of interrupts after the processing step in which the interrupt has been accepted. Refers to the control information in the storage means 9 and decides whether to perform it by hardware or by a program, and if the determined result is hardware, the interrupt processing is executed from this hardware, and the determined result is If it is a program, this program executes the interrupt processing.

The storage means g in which the control information of the start command means d and the interrupt execution means e is stored, and the information update means f after the end of execution or before the start of execution of the start command execution means d and the interrupt execution means e. Information will be updated.

Therefore, the input/output control units a1 to an are apparently controlled in parallel by hardware control and program control.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

FIG. 2 is a block diagram showing the main part configuration of an input/output control device according to an embodiment of the present invention.

The input/output control device 14 of this embodiment is provided with a microprocessor 21 as a control center, and a local bus 20 to which this microprocessor 21 is connected is connected to a program area 22. Local memory 23. Main bus control section 24. Input/output control unit 26 of the DMA 25° line printer device 16 and input/output control device 2 of the card reading device 17
7 is connected.

The local memory 23 stores control information as shown in FIGS. 3 to 5, and FIG. 3 shows control information for synchronizing the operations of the input/output control unit 26 and 27. 4 shows the format of the input/output control section 26 and 2.
FIG. 5 shows the format of the control information that instructs the input/output control unit 26 and 27 to select the interrupt processing.

The program area 22 stores programs as shown in the flowcharts of FIGS. 6 to 14. FIGS. 6 to 8 show the general flow of the common routine according to this embodiment, and and FIG. 10 shows the input/output control section 26.
11 and 12 show a schematic flow of the interrupt processing routine of the input/output control unit 27, and FIG. FIG. 14 shows a schematic flow of one processing routine to be executed by the input/output control section 27.

On the other hand, the information processing giE1 to which the input/output control device 14 of this embodiment is applied is configured as shown in FIG.
Input/output control unit 2 of input/output control ¥R position 14 of this embodiment
The connection and separation between the main bus 10 and the local bus 20 is controlled by the main bus control unit 2 so that the main bus 10 and the local bus 20 are operated accordingly.
This is the configuration performed by 4.

Next, the operation of the input/output control device of this embodiment will be described with reference to FIG. 15. However, in Figure 15, LPI
I! The 60 section corresponds to the input/output control section 26, and the CR1tlJ control section corresponds to the input/output control section 27. Therefore, the input/output control unit 26 is referred to as the LP control unit 26 here, and the input/output control unit 2
7 is called CRIll 111 part 27.

Further, the drawing numbers briefly indicate that the corresponding processing flow is being executed.

Now, in the operation of both line printer device (LP>16 and card reader ff (CR) 17), CR
It is assumed that the υ control unit 27 is executing a program of the general flow shown in FIG.

At this point, if the L Pil 011 section 26 is activated from the central processing υ control device 11, the L Pil
An interrupt 32 is generated from the J control section 26, and when this interrupt is accepted, the bumgram processing of the CR control section 27 is interrupted.
The interrupt processing routine of the LPI 11 control section 26 shown in FIG. 9 is entered.

Here, BITO of the control information LPISB shown in FIG.
is set during the initialization or termination process.
1”, so interrupts are sent to central processing unit 1.
It is determined that the interrupt was caused by the activation of 1. Based on this determination, the process moves to the LP activation routine in the interrupt processing shown in FIG.

In this LP startup routine, the control information LPC shown in FIG.
Each BIT of control information LPFAB in B and FIG.
Set O to “1” to enter the operation of LPIItB, and first complete the interrupt processing by instructing the interpretation of the startup command and data transfer from the main startup storage device 12 (LPFB update).
.

Then, the CR$11 unit 27 restarts the program processing shown in FIG. A IIJ m signal 30@DMA
In addition to 25, control is transferred to DMA 25, and the process returns to the main routine of FIG.

At this point, the CR control unit 27 has separated from program control and has started data transfer to the main storage device 12 using the DMA 25, and the
has not yet entered into concrete operations.

When the program processing returns to the main routine shown in FIG. 6, BITO of the control information CRCB in FIG.
"Since it is set, the routine shown in Figure 7 is entered, and in this routine T-F Figure 4) Control m information LP
Since FB (7) BITO is set to "1", BITO of control information LPFB in FIG. 4 is set to "0".
, and the process moves to the LP control section program shown in FIG.

When the data transfer from the R control section 27 to the main storage device 12 is completed during the program processing of the LP control section 26 shown in FIG. 13, an interrupt 33 is generated from the CR control section 27, and the interrupt 33 is accepted. When the LP controller 2 shown in FIG.
6 is interrupted and the CR shown in FIG.
Enters the control unit's interrupt processing routine.

Here, BIT2 of the control information CRISB in FIG. 5 is “
Since it is set to 1', the process moves to the interrupt processing routine of the CR control section shown in FIG. 12, and in this interrupt processing routine, BIT2 of the control information CRFB shown in FIG. 4 is set to 1". It declares that the next process to be executed is termination processing and completes the interrupt process.

The LP control unit 26 restarts the program processing of the LP control unit 26 shown in FIG.
BITl of EBS is set to "1", thereby input/output υII [1 section 26 to CM A control signal 31 is set to 0M
In addition to A25, control is transferred to 0MA25, and the process returns to the main routine shown in FIG.

At this point, the LP control section 26 has left the program control and data transfer from the main storage device 12 using the DMA 25 has started, and the CR control section 26 is about to move on to the final termination process.

As mentioned above, in this embodiment, the local memory 2
While sequentially executing a plurality of serial processing steps based on the control information stored in 3 and shown in FIG. 4,
When an interrupt is accepted, the program processes the interrupt by referring to the control information stored in the same local memory 23 and shown in FIG. If the setting interrupt is accepted by a program, the interrupt processing is executed by hardware.

Then, the control information stored in the local memory 25 as shown in FIGS. 4 and 5 is updated so that the above-mentioned processes are executed sequentially, so that parallel operations as shown in FIG. 15 are performed. becomes possible.

[Effects of the Invention] As explained above, in the input/output control device to which the present invention is applied, the startup command execution means executes a plurality of input/output processes in series in response to a single startup command from the center. When an interrupt is accepted while executing the process by subdividing it into processing steps, this interrupt acceptance determines whether the subsequent interrupt processing will be performed by hardware or a program, and the interrupt is executed as determined. Processes can be selected and executed as appropriate.

Therefore, a plurality of input/output control units can be efficiently operated in parallel without increasing hardware.

[Brief explanation of the drawing]

FIG. 1 is a functional block diagram showing an outline of an input/output control device according to the present invention, FIG. 2 is a block diagram showing a main part configuration of an input/output control device according to an embodiment of the present invention, and FIG. Figure 4 shows the format of the control information that synchronizes the operations of the two input/output control units. FIG. 5 is a diagram showing the format of control information for selecting and instructing interrupt processing of two input/output control units, and FIGS. 6, 7, and 8 are schematic flowcharts of a common routine according to an embodiment of the present invention. 9 and 10 are diagrams showing a schematic flow of an interrupt processing routine of the input/output control unit of a line printer device according to one embodiment, and FIGS. 11 and 12 are diagrams showing a card according to one embodiment. FIG. 13 is a diagram showing a schematic flow of an interrupt processing routine of an input/output control section of a reading device, and FIG. 13 is a diagram showing a schematic flow of a processing routine to be executed by an input/output control section of a line printer according to an embodiment thereof. , 1st
FIG. 4 is a diagram showing a schematic flow of one processing routine to be executed by the input/output control section of a card reading device according to one embodiment, FIG. 15 is a diagram showing a flow of parallel operations according to one embodiment, and FIG. The figure is a block diagram schematically showing an example of an information processing device to which an input/output control device is applied. a1-an...Plural input/output control units b...Centers 01-cn...Plural devices d...Start-up command execution means e...Interrupt execution means "...Information update means... ... Storage means 10 ... Main bus 11 ... Central processing control unit 12 ... Main storage device 13 ... Magnetic disk control device 14 ... Input/output control device 15 ... Magnetic disk device 16 ... Line printer device 17 ... Card reader 21 ... Microprocessor 22 ... Program area 23 ... Local memory 24 ... Main bus control section 25 ... DMA 26 ... Input/output Control unit 27...input/output control unit

Claims (1)

[Claims] (1) An input/output control device comprising a plurality of input/output control units, and each time a start command is issued from a center, the input/output control unit corresponding to the start command is operated under microprocessor control; startup instruction execution means for subdividing and executing input/output processing to be executed by a single startup instruction into a plurality of serial processing steps; and a startup instruction execution means for sequentially executing the plurality of serial processing steps. an interrupt execution means that is capable of accepting an interrupt within the computer, and that appropriately selects and executes interrupt processing after the processing step in which the interrupt is accepted by hardware or a program; An input/output control device comprising: information updating means for updating information in a storage means in which control information for each execution means is stored after execution of each execution means ends or before execution begins.