JPH0410276A - Storage device - Google Patents

Abstract

PURPOSE:To read/write a desired data at high speed by controlling the active/ inactive state of a ready signal corresponding to the state of attaching/detaching a storing medium to be inserted freely attachably and detachably. CONSTITUTION:In the storage device to access the storing medium based on access permission information while having a driving means for the attachable/ detachable storing medium and a permitting means to output the access permission information to the storing medium, a detecting means 1c monitors the operation of attaching/detaching the storing medium and a drive control part 1a holds an access permitted state while loading the storing medium even when the operation of a driving means 1b is stopped. Thus, the access of confirming the storing medium to be executed when the driving means 1b is driven again can be avoided, and the desired data can be read/written at high speed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention relates to a storage device in which a storage medium is removable.

[Prior Art] Conventionally, in this type of device, a floppy disk drive device (FDD) in which a floppy disk (FD) serving as a storage medium, for example, can be freely attached and detached has been put into practical use.

In this FDD, when a floppy disk (FD), which is a storage medium, is inserted and the motor that rotates the FD reaches a certain speed, it activates a "ready signal" indicating that the floppy disk can be read and written. I was doing it. Therefore, when the signal that turns on the FDD motor becomes inactive, that is, when the motor is turned off, the "ready signal" also becomes inactive.

However, power consumption is a problem in devices powered by batteries or other power sources, so when there is no need to operate the FDD, the "motor on signal" is made inactive to reduce power consumption. In this case, since the "ready signal" is inactive until the motor is turned on to access the FD again, the device does not know whether the FD has been attached or detached by the operator during that time. Therefore, when the motor was turned on, it was necessary to check which FD was inserted. In addition, in a type of device that writes the FD file list to the device's memory in order to speed up FD access, when the motor is turned on, the file list recorded on the FD is written back to the device's internal memory. I need to write.

[Problems to be Solved by the Invention] For this reason, each time the motor is turned on, it is necessary to check the FD type and refer to the file list, which slows down the FD access speed and further reduces the current consumption due to the processing operation. There were problems such as an increase in

The present invention has been made to solve the above problems, and by controlling the active/inactive state of a ready signal according to the attachment/detachment state of a recording medium into which a storage device is removably inserted, To provide a recording device capable of reading and writing desired data at high speed and accessing data with low power consumption by eliminating FD type and file list reference processing for each FD access after FD access.

[Means for Solving the Problems 1] The recording device according to the present invention includes a detection means for detecting the attachment/detachment operation of a storage medium, and controls the output of the permission means based on the detection result of the detection means while the drive means is stopped. The system is equipped with a control means for controlling.

Further, the storage medium is a floppy disk.

[Operation] In the present invention, the detection means monitors the storage medium attachment/detachment operation, and if the detection means does not detect the storage medium attachment/detachment while the drive means is stopped, permission is granted when the drive is restarted. The control means controls the means to immediately output the access permission information.

Further, the storage medium is constituted by a floppy disk, and the detection means monitors the attachment/detachment state of the floppy disk.

[Embodiment] FIG. 1 is a block diagram illustrating the configuration of a storage device showing an embodiment of the present invention, and 1a is a drive control unit (FD
IC), motor on signal (MON) from the system
d, a ready signal (RED) le, a system signal 1f, etc., and outputs a drive signal to a motor 1b that rotates a floppy disk (not shown). 1c is an FD output section that detects that a floppy disk is inserted and outputs a status signal to the drive control section 1a. Reference numeral 1g denotes a motor rotation detection section that detects that the rotation of the motor 1b has reached a constant rotation, and outputs a status signal thereof to the drive control section 1a. A floppy disk drive (FDD) 1 is constituted by each of the above 1a to 1g.

The ready signal 1e becomes active when a floppy disk is inserted when the motor-on signal 1d is inactive, and indicates that the FDD 1 can be read and written when the motor-on signal 1d is active. That is, it becomes active when the motor 1b rotates at a constant speed and a floppy disk is inserted.

Further, the motor-on signal 1d is a signal instructing the rotation of the floppy disk, and when the motor-on signal 1d is active, the motor 1b rotates, and when it is inactive, the rotation of the motor 1b is stopped.

In the storage device configured as described above, the detection means (in this embodiment, the FD zein exit part 1c) monitors the attachment/detachment state of the storage medium (floppy disk), and the drive means (in this embodiment, the floppy disk is rotated at a constant speed). While the drive stop command is being output (motor on signal 1d is "L level") to the motor 1b (assuming a motor 1b that is driven to rotate at a high speed), the drive control unit (IC
) 1a is a control command for starting access to the floppy disk (ready signal 1e in this embodiment) based on the authenticity of the detection signal output from the FD output section 1c.
The access start control command (ready signal 1e) is set to true (0/1) even if the drive stop command is being output (motor on signal 1d is "L level") while the floppy disk is inserted. rlJ).

Further, the storage medium is constituted by a floppy disk, and the detection means monitors the attachment/detachment state of the floppy disk.

Furthermore, a drive stop command is being output to the drive means (motor 1b) (motor on signal 1d is "L level")
If the truth result of the detection signal output from the FD zein output section 1C is true, it is determined that the floppy disk is being loaded.

FIG. 2 is a block diagram illustrating the main internal configuration of the drive control section 1a shown in FIG. is input. 2b is the motor on signal, NAN
The signal is input to the D circuit 2e, and is subjected to NAND processing with the output 2g of the NOT circuit 2d.

2c is the FDIN signal, which becomes active when a floppy disk (FD) (not shown) is inserted. It is output to the AND circuit 2f, performs AND processing with the NAND output 2h of the NAND circuit 2e, and then receives the final signal. A ready signal 21 is output to a system (not shown).

As a result, when the constant speed rotation signal 2a is at "H level", N
The output 2g of the OT circuit 2d becomes "L level", and when the constant speed rotation signal 2a is "L level", the output 2g of the NOT circuit 2d becomes "H level".

In addition, NAND output 2h is motor on signal 2b and output 2g
When any one of them is at "L level", it becomes "H level".

Furthermore, the ready signal 21 is connected to the NAND output 2h and the FDIN
Unless both the signal 2c and the signal 2c are at the "H level", the "H level" will not be achieved. That is, the ready signal 21 becomes "H level" when the FDIN signal 2c is "H level".
Motor on signal 2b is "L level" or constant speed rotation signal 2a
is at "H level".

Next, the operation shown in FIG. 2 will be explained with reference to the timing chart shown in FIG.

FIG. 3 is a timing chart explaining the operation of FIG. 2.

At timing Ta, the motor-on signal 2b goes high, and then at timing Tb, the constant speed rotation signal 2a goes high. At that time, the FD has not been inserted yet (and the FDIN signal 2e remains at "L level"), but at timing Tc, the FD is inserted and the FD
When IN signal 2C becomes "H level", constant speed rotation signal 2
Since both the motor-on signal a and the motor-on signal 2b are at "H level", the ready signal 21 is at "H level". When the motor-on signal 2b goes to "L level" at timing Td, the constant speed rotation signal 2a goes to "L level" at timing Te.
However, since the FD remains inserted, the ready signal 21 remains at the "H level". timing T
When the motor-on signal 2b becomes "H level" again at timing Tf, the ready signal 21 becomes "L" since the constant speed rotation signal 2a is not yet "H level" at timing Tf.
level.” However, when the constant speed rotation signal 2a becomes "H level" at timing Tg, the ready signal 21
It also becomes "H level". From timing Th to timing Ti, that is, when the constant speed rotation signal 2a and motor-on signal 2b are at "H level", but when the FDIN signal 2c is at "L level", that is, when the floppy disk is ejected, the ready state is reached. The signal 21 becomes "L level". Of course, at timing Ti, when the floppy disk is inserted again, the ready signal 21 becomes "H level". Further, the floppy disk is taken out from timing Tk to timing T1 when the constant speed rotation signal 2a and the motor-on signal 2b are at "L level" and the FDIN signal 2c is at "H level", and the FDIN signal 2c is at "L level". Then, the ready signal 21 becomes "L level".

FIG. 4 is a block diagram illustrating a system configuration including the drive control section 1a shown in FIG. 1, and the same components as in FIG. 2 are given the same reference numerals.

In the figure, a CPU 4 controls the system in general. Reference numeral 5 denotes a storage device, which includes a workpiece 5a necessary for controlling this system, a motor status register (MR) 5b indicating whether the motor-on signal 1d is at "H level", and an FD.
It consists of a ready register (RDY) 5c that stores whether the ready signal 1e from the DI remains at "H level", a timer (T) 5d, a list buffer 5e that stores the list portion of the FD, and the like.

The contents of the motor status register (MR) 5b are "1" when the motor-on signal 1d is "H level", and are "0" when the motor-on signal 1d is "L level".

Also, the contents of the ready register (RDY) 5c are such that when the constant speed rotation signal 2a is at the rHJ level, the FDIN signal 2C is at the rHJ level.
If it is HJ level, it will be "1", if it is rLJ level, it will be rOJ, and when constant speed rotation signal 2a is at rLJ level, if ready signal 1e remains at "H" level, it will be "1", and if ready signal 1e is at rLJ level, it will be "1". After that, it becomes "O". However, the time when the motor 1b starts rotating is excluded.

6 is an FD controller that controls FDDI.

7 is a timer circuit which interrupts the CPU 4 via the interrupt line 7a at a certain arbitrary period to the CPtJ4.

Next, the operation of the system shown in FIG. 4 will be explained with reference to FIGS. 5 to 7.

FIG. 5 is a flowchart illustrating an example of the FDDI motor-off processing procedure shown in FIG. 4. In addition, (1
) indicates a step.

The CPU 4 receives the motor-on signal 1 by the FD controller 6.
d to "L level", set rOJ in the motor status register (MR) 5b of the storage device 51), and end the process.

FIG. 6 is a flowchart illustrating an example of a timer processing procedure by the timer circuit 7 shown in FIG. In addition,
(1) to (4) indicate each step.

It is necessary to judge whether the timer (T) 5d is within the predetermined time TW from turning on the motor to reaching constant speed rotation.1) If YES (within TWu), proceed to step (3); T) When 5d exceeds time TW), the process proceeds to step (2). This is to prevent the ready register (RDY) 5c from becoming "0" during the time when ready becomes "L level" from timing Tf to timing Tg in FIG.

Next, the ready signal 1e is read, its value is ANDed with the contents of the ready register (RDY) 5c, and the value is set in the ready register (RDY) 5c again (2). That is, when the ready signal 1e changes from "H level" to "L level", ready register (RDY) 5c
becomes "0". Next, the timer (T) 5d is incremented by "1" L (31 execute other processes 4), and the process ends.

FIG. 7 is a flowchart illustrating an example of a catalog display processing procedure by the CPU 4 shown in FIG. In addition,(
1) to (9) indicate each step.

First, determine whether the content of the ready register (RDY) 5c, which indicates whether the ready signal 1e has become "L level", is "1"1) If YES (RDY = 1), turn on/off the motor 1b. Execute the catalog display process to display the contents of the catalog buffer 5e regardless of whether it is off9)
, ends the process.

On the other hand, if the determination in step (2) is No (RDY=O), it is determined whether the content of the motor status register (MR) 5b indicating whether the motor 1b is in the on state is "1" (2), YES. If so, proceed to step (4) and onwards.
If so, turn on the motor 1b and set the motor status register (MR).
) 5b to "1" 3) Set timer (T) 5d to "
0" and determine whether the ready signal 1e is at "H level" 5) If NO, determine whether the content of the timer (T) 5d is less than the above time TW 6) If No, proceed to step (5) If the answer is YES, it is determined that the FD has not been inserted into the FDDI, and error processing, for example, a display indicating that the FD has not been inserted, is executed. 7) The process ends.

On the other hand, if the determination in step (5) is YES, the ready register (RDY) 5c is set to "1", the floppy disk inventory is read into the inventory buffer 5e (8), and the process proceeds to step (9). , inventory buffer 5
The contents of e are displayed, and this catalog display process is ended.

As a result, the processing between steps (3) to (8) after the ready signal 1e becomes "L level" is not executed.

In the above embodiment, a case has been described in which the ready signal 21 is controlled by the drive control section 1a composed of logic circuit elements as shown in FIG. 2, but the present invention is not limited to this embodiment.
The drive control unit 1a is built into a ROM chip (not shown) (
It is also easy to make the CPU 4 (with built-in software) function.

In addition, although we have explained the case where the contents of the ready register (RDY) 5c are changed within the timer processing shown in FIG. 6, the ready signal 1e is used as an interrupt, and thereby the ready register (RDY) 5c is changed. With this configuration, processing time in timer processing can be saved.

Further, in the above embodiments, a floppy disk is used as the storage medium, but the present invention can also be applied to optical disks, magneto-optical disks, and hard disks.

[Effects of the Invention] As described above, the present invention includes a detection means for detecting the attachment/detachment operation of a storage medium, and a control means for controlling the output of the permission means based on the detection result of the detection means while the drive means is stopped. As a result, even if the drive means stops operating, the access permission state can be maintained as long as the storage medium is attached. Therefore, it is possible to avoid the conventional predetermined storage medium confirmation access performed when the driving means is re-driven, and it is possible to immediately proceed to data access processing.

Further, since the storage medium is configured with a floppy disk, it is possible to suppress power consumption of the floppy disk in a system configured using a floppy disk as a storage medium.

[Brief explanation of drawings]

FIG. 1 is a block diagram illustrating the configuration of a storage device showing an embodiment of the present invention, FIG. The figure shows a timing chart explaining the operation in figure 2, and a timing chart for explaining the operation in figure 4.
The figure is a block diagram illustrating the system configuration including the drive control section shown in FIG. 1, and FIG.
FIG. 6 is a flowchart illustrating an example of a DD motor-off processing procedure, and FIG. 7 is a flowchart illustrating an example of a timer processing procedure by the timer circuit shown in FIG. 4.
5 is a flowchart illustrating an example of a catalog display processing procedure performed by the CPU shown in FIG. 4. FIG. In the figure, 1 is the FDD, 1a is the drive control section, 1b is the motor, 1c is the FD-in detection section, 1d is the motor on signal, 1
e is a ready signal, and 1g is a motor rotation detection section. power diagram diagram diagram diagram figura diagram) diagram of action diagram

Claims (2)

[Claims] (1) A memory that has a drive means that drives a removable storage medium and a permission means that outputs access permission information to the storage medium, and that accesses the storage medium based on the access permission information. The apparatus is characterized in that it comprises a detection means for detecting the attachment/detachment operation of the storage medium, and a control means for controlling the output of the permission means based on the detection result of the detection means while the drive means is stopped. storage device. (2) The storage device according to claim (1), wherein the storage medium is a floppy disk.