JPS6232525A - Disk device control system - Google Patents

Abstract

PURPOSE:To control a disk device at a high speed by providing an interrupting signal controlling circuit which can output an interrupting signal from a disk device controlling circuit which is not selected until a command is started, as well, on a selected disk device controlling circuit. CONSTITUTION:When a command which is not accompanied with a data transfer to a disk device 10, an ADPS1 signal being an output signal of a selecting circuit 14 is inverted to logic '1'. As a result, as for an INTM1 signal for controlling an output of an interrupting signal of a disk device controlling circuit 12, a disk device controlling circuit 13 is selected by the selecting circuit 14. Also, until the disk device controlling circuit 12 is selected by the selecting circuit 14 again after the time point when a command start to the disk device controlling circuit 13 is executed, that is to say, only during a timing B, the device is operated so that the interrupting signal is inhibited, therefore, even if the disk device controlling circuit 12 is not selected by the selecting circuit 14, an INT1 signal being an internal interrupting signal which is generated in other time than during the timing B is allowed as to its output, and the interruption processing is executed at a high speed remarkably.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disk device control method, and particularly to a disk device control method on the high speed side @VC of an interrupt signal that selects one of a plurality of disk device control circuits. Regarding.

[Conventional technology]

Conventionally, this type of disk device control method i1!4 As shown in Figure 4, there are a plurality of disk device control circuits, and a selection circuit that selects and enables operation of one of the plurality of disk device control circuits using a program. Gates 46, 47, and 48 are configured from gates 46, 47, and 48 in order to prevent a disk device control circuit that has not been selected by the selection circuit from being improperly operated by reading or writing data to the selected disk device control circuit.
Generally speaking, the Vc device prohibits the input of commands, the output of all data transfer request signals, and the output of interrupt signals.

[Problem that the invention seeks to solve]

In the nine conventional disk device control methods described above, in the disk device control circuit that is not selected by the selection circuit,
Even if an interrupt signal is generated due to the completion of a seek operation of the disk device or a state transition, the interrupt signal cannot be output until it is selected by the 5 selection circuit, and as a result, the performance of the disk device is greatly reduced. It had the disadvantage of falling.

[Means for solving problems]

Disk device control method μ of the present invention A disk device control method that is configured of a plurality of disk device control circuits and a selection circuit that selects one of the plurality of disk device control circuits, and controls one disk device control circuit. In , when the selected disk device control circuit is started with the 5 command that involves data transfer with the disk device, the output of the selection circuit is held until the data transfer with the disk device is completed, and the disk device When a command that does not transfer all data to and from It has an interrupt signal control circuit that can output interrupt signals from unselected disk device control circuits until all commands are activated.

Furthermore, in the disk device control system of the present invention, in a disk device control method that enables operation of only one disk device control circuit selected by a selection circuit among a plurality of disk device control circuits, a selection circuit is provided. When a command that involves data transfer with the disk device is started for the disk device control circuit that has been configured, the output of the selection circuit is held until the data transfer with the disk device is completed, and the data transfer with the disk device is stopped. When a command without an accompanying command is activated, after the command is activated, the selection circuit is controlled to select all of the multiple disk device control circuits at least once, and the command is sent to the selected disk device control circuit. It has an interrupt signal control circuit that allows all interrupt signals from unselected disk drive control circuits to be output by modifying the selection circuit before starting up.

〔Example〕

Next, an embodiment of the present invention will be shown as a summary of the explanation of the present invention with reference to the drawings. In FIG. 1, the disk device control method of the present invention includes a disk control device! t11, and a plurality of disk device control circuits 12.13 connected to the disk control device 11.

Only one of the plurality of disk device control circuits 12.13
It consists of a selection circuit 14 for selecting one by program, and interrupt signal control circuits 15 and 16, each of which has a built-in disk drive control circuit 12 and 131C. Selection circuit 14
is composed of flip-flops, etc., and includes a programmable VC disk device control circuit 12 and a disk device control circuit 1.
Only one of the three is selected, and the selected disk device control circuit 12 (also H13) is enabled to operate.

Now, when the Al)Pa1 signal output from the selection circuit 14 is logic 11'', the disk device control circuit 12 is selected, and the gate 17 allows a command to the disk device control circuit 121c, and the disk device is controlled by the control circuit. The data transfer request signal from 12 is allowed to be output at the gate 18. At the same time, the ADP82 signal output from the selection circuit 14 becomes logic "Om," and neither the command input to the disk device control circuit 13vc nor the output of the data transfer request signal occurs. Game) 9
．． Banned in 10.

FIG. 82 shows the configuration of the interrupt signal control circuit 15 in this embodiment. In FIG.
Inverter 21, NAND gate 22゜25, and NO
It is composed of an R gate 23 and an R-8 flip-flop 24, and uses the iNTM1 signal, which is the output signal of the R,-8 flip 70 block 14, to control the output of an interrupt signal.

That is, the RESET signal input at power-on or the selection circuit 14 selects the disk device control circuit 12t. That is, when the ADP81 signal, which is the output signal of the selection circuit 14, is logic "1", the R-87 flip-flop 24 is reset, and the INTMI signal, which is the output signal of the )t, -8 flip-flop 24, becomes logic "1". Also, the selection circuit 14 selects the disk device control circuit 13t.That is, the CM signal, which is a signal indicating command activation, when the ADP81 signal, which is the output signal of the 1 selection circuit 14, is logic @O#.
When the D signal is a logic ``1'', the R-8 flip 70 block 24 is set, and the INTMI signal μ, which is the output signal of the R-8 flip flop 24, becomes a logic ``01''.

As a result, in a conventional disk device control method in which the output of the interrupt signal is simply controlled by the output signal of the selected time i, the output of the interrupt signal is prohibited only during the timing shown in Figure 3. In contrast, in the disk device control system of the present invention, the selection circuit 14 selects a command, for example, a disk data When the read command is activated, the ADPSI signal, which is the output signal of the selection circuit 14, is held at logic 10'' until the data transfer with the disk device 110 is completed, and after the data transfer is completed, the ADPSI signal, which is the output signal of the selection circuit 14, is held at logic 10''. Inverts a certain ADPSI code to logic “1”.Also, the disk drive @10
When a command that does not involve data transfer with, for example, a 7-ri command is activated, the selection circuit 1 is activated immediately after the command is activated.
The ADP31 signal, which is the output signal of 4, is inverted to logic "1".
ck disk device control circuit 13 is selected, and
2 interrupt signals are generated only during the period from the time when the command activation for the disk device control circuit 13vc is executed until the disk device control circuit 12 is selected again by the selection circuit 141C, that is, during timing B shown in FIG. 3. Therefore, even if the selection circuit 14 is not selected and the disk drive control circuit 12 is not selected, timing B in FIG.
The output of the 1NT1 signal, which is an internal interrupt signal generated outside the opening of the n1 system, is allowed to be output.Compared to the conventional system, the interrupt processing is significantly faster and the control of the disk device is faster.

It should be noted that the interrupt signal control circuit 16 can also perform vc expression in the same way as the interrupt signal control circuit 15, and its operation is also the same as that of the interrupt signal control circuit 15.

〔Effect of the invention〕

As described above, the present invention provides a method for controlling a selected disk in a disk device control method in which only one disk device control circuit selected by a selection circuit out of a plurality of disk device control circuits is operable. When a command that involves data transfer with the disk device is activated for the device control circuit, all outputs of the selection circuit are held until the data transfer with the disk device is completed, and commands that do not involve data transfer with the disk device are activated. When starting the command, after starting the command, the selection circuit ICj is activated by controlling the selection circuit so that all of the plurality of disk drive control circuits are selected at least once. Having an interrupt signal control circuit that can output an interrupt signal even from a disk drive control circuit that has not been selected has the effect of speeding up the control of the disk drive.

[Brief explanation of the drawing]

Fig. 1 shows an embodiment of the present invention, Fig. 2 shows an interrupt control circuit in this embodiment, Fig. 3 shows a time chart in this embodiment, and Fig. 4 shows a conventional disk drive. FIG. 3 is a diagram showing a device control method. 10... Disk device, 11... Disk control device, 12.13... Disk device control circuit, 14... Selection circuit, 15.16...・
...Interrupt signal control circuit, 17, 19. 26・---
-・-AND gate, 18. 20°22, 25.
27. 28...NAND gate, 21...
...Inverter, 23...NOR, gate, 24...R-8 fritz 1 frog. Agent: Patent Attorney Uchihara, Figure 2 - iB Figure 3

Claims (1)

[Claims] In a disk device control method that includes a plurality of disk device control circuits and a selection circuit that selects one of the plurality of disk device control circuits, the selection circuit enables the selected one disk device control circuit to operate. When a command that involves data transfer with the disk device is activated for the disk device control circuit that has been configured, the output of the selection circuit is held until the data transfer with the disk device is completed, and the data transfer with the disk device is When a command that does not involve transfer is activated, after the command is activated, the selection circuit is controlled to select the plurality of disk device control circuits until the command is activated for the selected disk device control circuits. A disk device control method characterized by having an interrupt signal control circuit that can output an interrupt signal from a disk device control circuit that is not selected.