JP2817608B2 - Information processing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information processing apparatus such as a combination of a floppy disk drive (FDD) and a host device.

[0002]

2. Description of the Related Art Generally, there are two types of 3.5-inch floppy disks widely used in the market, namely, a double-sided double-density disk (2DD) and a double-sided high-density disk (2HD). These are roughly classified into various storage capacities by a word processor, a personal computer, or the like, and the following disks are roughly classified. (1) A disk having a format capacity of 640 kilobytes obtained by formatting a 2DD disk. (2) A disk with a format capacity of 720 Mbytes obtained by formatting a 2DD disk (hereinafter, a 640 Kbytes disk and a 720 bytes disk)
A kilobyte disk is referred to as a 2DD disk). (3) A disk having a format capacity of 1.25 megabytes (hereinafter referred to as a 1.25 MB disk) obtained by formatting a 2HD disk. (4) A disk having a formatted capacity of 1.44 megabytes (hereinafter referred to as a 1.4 MB disk) obtained by formatting a 2HD disk. Among 2HD disks, 1.25 MB disks are the mainstream among personal computers and the like that are widespread in Japan. On the other hand, for PCs and other devices that are widely used overseas,
1.44 MB disks are the mainstream.

[0003]

In recent years, overseas personal computers and the like have begun to spread in Japan. In the case of a 2DD disk, both the personal computer for domestic use and the personal computer for overseas use can be read and written by setting the above-mentioned 720 kilobyte format, and data compatibility can be maintained. However, in the conventional FDD using a 2HD disk, 1.25 MB and 1.
There were many models that could read and write only in one of the 44 MB capacities. The 2DD type and the 2HD type can be distinguished from each other by an opening provided in a disk container.
The disc B cannot be detected by the disc type discrimination sensor because the same 2HD floppy disc is used for both. For this reason, the conventional external three-mode FDD is provided with a manual mode changeover switch.
The disk rotation was manually set to 360 rpm mode for the 5 MB type, and set to 300 rpm mode for the 2HD 1.44 MB type. Therefore, the operation of the FDD is troublesome. In addition, also on the host device side,
1.25MB for 2DD, 2HD, and 1.44 for 2HD
Although MB information is required, this information can be obtained by reproducing the media ID data for disc identification written in track zero of the disc at the time of formatting or information similar thereto. The above-mentioned problem is caused by the problem that F-disks using a 5.25-inch type floppy disk are used.
This also occurs when the DD is externally attached to the host device. That is,
There are two types of 5.25 inch type floppy disks, 2DD type and 2HD type. However, the floppy disk does not have a detected part for distinguishing between them. Therefore, the host device determines the distinction between the two types based on the read media ID data or information based on the media ID data. The media discrimination result is sent to a 5.25 inch FDD built in the host device through a dedicated signal line, but the media discrimination result is sent to an external 5.25 inch FDD. Is not configured as such. For this reason, an external 5.25 inch FDD
It is necessary to provide a manual mode changeover switch to switch the filter constant of the read circuit and switch the write current in the write circuit.
Similar to D, there is a problem that the operability is poor. In order to solve the above-described problem, it is conceivable to provide a signal line dedicated to mode switching between the host device and the FDD. However, a special port is required for such a configuration. , Inevitably increases costs.

An object of the present invention is to provide an information processing apparatus capable of automatically setting a mode suitable for a recording medium disk to be used.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a disk rotating device configured to be capable of detachably mounting a plurality of types of recording medium disks, and a disk rotating device mounted on the rotating device. A signal conversion head for performing signal conversion by a relative scanning movement with respect to a read disk, read and / or write means for processing a read and / or write gate signal connected to the signal conversion head, and An information processing apparatus comprising: an information storage device having a head loading means for bringing a signal conversion head into contact with the disk; and a host device connected to the information storage device, wherein the host device has the plurality of types of recordings. A medium disk is determined, and a mode switch indicating a mode switching of the information storage device due to a difference between the plurality of types of recording medium disks is performed. Means for generating a command signal, head load signal generating means for supplying the head load signal to the head load means, and a first signal for the time when the head load signal changes from a non-load state to a load state. In addition to generating a read and / or write gate signal so as to allow read and / or write in the read and / or write means with a delay time, the mode switching command signal indicates mode switching. Generates a read and / or write gate signal to permit read and / or write with a second delay time longer than the first delay time in response to A read and / or write gate signal generating means for supplying a gate signal to the read and / or write means; A storage device having mode switching detection means for detecting mode switching information based on whether or not the read and / or write gate signal has the second delay time; The present invention relates to an information processing apparatus configured to switch and control one or both of a mode of a disk rotating device and a mode of the read and / or write means. It is desirable that the drive select signal is associated with a head load signal and a read and / or write gate signal. Further, as shown in claim 3, the head loading means can be omitted. In addition, the mode switching information can be sent from the host device to the information storage device with a difference in the time relationship between the drive select signal and the read and / or write gate signal.

[0006]

According to the present invention, it is not necessary to send a signal indicating an operation mode suitable for the recording medium disk used from the host device to the information storage device through a dedicated signal line. In other words, since another signal line sent from the host device to the information storage device is also used, and the mode switching signal is sent in a form that can be distinguished from another signal, the conventional interface can be used as it is, and the cost of the device can be reduced. The rise can be suppressed. More specifically, the leads and / or
Alternatively, since the mode switching information is transmitted by also using the write gate signal, the mode switching information can be transmitted very easily and can be detected very easily. In the case of the invention of claim 3, it becomes possible to use a common host device for both the information storage device having the head loading means and the information storage device having no head loading means, Cost reduction of the host device is achieved. As described above, since the mode switching signal is supplied from the host device to the information storage device, it is not necessary to manually perform the mode switching on the information storage device side, so that the mode switching is automated and the operability is improved.

[0007]

First Embodiment Next, a computer system as an information processing apparatus according to an embodiment of the present invention will be described with reference to FIGS.

FIG. 1 schematically shows the entire computer system. This computer system includes a host device 1
A keyboard 2 as an input device, a display device 3,
External FDD as information storage device (external storage device)
(Floppy disk device) 4. The FDD 4 is connected to the host device 1 by an interface cable 5. The host device 1 is a 3.5-inch built-in FD
D6, in which a floppy disk (resident software) or a device driver 7 in which MS-DOS (Microsoft operating system), which is a basic operation program for a personal computer, is written is inserted. More specifically, this OS (operating system) is a personal computer PC-98 of NEC Corporation.
This is MS-DOS made for 01.

FIG. 2 shows the inside of the host device 1 in principle, and includes a CPU 8, a ROM 9, a RAM 10, and a built-in F
It has a DD 6, an FDC (Floppy Disk Control Device) 6a for a built-in FDD, and an FDC 11 for an external FDD.

The external FDD 4 is of a three-mode type capable of using three types of 3.5-inch floppy disks of a 2DD type, a 2HD 1.25 MB type, and a 2HD 1.44 MB type. FIG. 3 shows a three-mode FDD 4 in principle, and includes a turntable 22, a motor 23, a motor control and drive circuit 24 as a rotating device of a floppy disk 21.
The motor control and drive circuit 24 has a built-in rotation speed switching means so that the disk 21 can be rotated in two stages of 360 rpm and 300 rpm. Further, at the time of initialization when the power is turned on, the disk 21 is first rotated at 360 rpm. It is configured as follows. If the disk 21 is, for example, 2HD 1.2
In the case of the 5 MB type, 80 tracks are concentrically arranged from the outermost track zero T00 to the innermost track Tn. Regardless of the type of the disk 21,
Well-known media ID data is written in the track zero T00 after formatting.

A head moving device 26 is connected to the signal conversion magnetic head 25 for reading and writing data. The head moving device 26 is a stepping motor 2
7 and a lead screw mechanism 28 for converting this rotational movement into a linear movement of the head 25.
On the desired track. A known control and drive circuit (not shown) for controlling and driving the stepping motor 27 is connected thereto.

The FDD 4 further includes a well-known read circuit 2.
9, write circuit 30, VFO 31, write data input terminal 32, write gate signal input terminal 33, read pulse output terminal 34, window signal output terminal 35, read gate signal input terminal 36, MFM / FM mode designation signal input terminal 37, In addition to having a drive select signal input terminal 38 and a head load signal input terminal 39, a head load means 40, a mode determination circuit 41 as a mode switching detection means, and an initialization circuit 42 are provided. The FDD 4 has more input / output terminals (ports), interface circuits, sensors, control circuits, and the like, but is not shown because it is not directly related to the present invention.

The write circuit 30 has a write data input terminal 3
2 and the head 25. The write circuit 30 is configured to switch the write current according to a change in the type of the disk 21. The write circuit 30 is connected to the write gate signal input terminal 33 and sends a recording signal to the head 25 when writing (writing) is permitted by the write gate signal. The write circuit 30 is connected to the drive select signal input terminal 38 and is energized when the drive select signal indicates a drive period.

A read circuit 29 connected between the head 25 and the read pulse output terminal 34 shapes the waveform of the reproduced signal to form a read pulse including data and a clock. This read circuit 29 includes a well-known waveform filter,
The constant of this filter is switched by the position of the head 25 in the radial direction of the disk 21, and
Can also be switched by a change in the type. Disk 21
The switching of the write current and the filter constant by the type of
This is performed based on a well-known HD sensor (not shown) provided in the FDD 4. The setting of the write current and the filter constant for the 1.25 MB type 2HD and the 1.44 MB type 2HD are the same. The read circuit 29 is also connected to the drive select signal input terminal 38 and is energized when the drive select signal indicates driving. A well-known VFO 31 connected between the read circuit 29 and the window signal output terminal 35 generates a window signal for separating a data pulse and a clock pulse based on the read pulse obtained from the read circuit 29. Note that V
FO31 is connected to read gate signal input terminal 36,
A read data pulse is output when the read gate signal permits reading. In addition, the MFM /
The FM mode designation signal input terminal 37 is also connected, and switching of circuit constants is performed between MFM read signal processing and FM read signal processing. The VFO 31 is connected to the read circuit 29
Together, they constitute a part of the lead means.

The head loading means 40 connected to the input terminal 39 is configured to contact the head 25 with the disk 21 in response to a head loading signal.

A mode determination circuit 41 is connected to the read gate signal input terminal 36, the drive select signal input terminal 38, and the head load signal input terminal 39, and extracts mode switching information included in the read gate signal. In addition,
In this embodiment, the mode determination circuit 41 responds to the initialization signal (reset signal) generated from the initialization circuit 42 connected thereto based on the detection of the power-on of the FDD by 360 rp.
The output of the m mode is sent to the motor control and drive circuit 24.
The motor control and drive circuit 24 rotates the motor 23 when the disk 21 is inserted and the power of the FDD is turned on.

FIG. 4 is a diagram equivalently showing a disk discriminating function and various signal generating means in the host device 1.
The data separator 51 is connected to the read pulse output terminal 34 and the window signal output terminal 35 of the FDD 4,
The data pulse and the clock pulse are extracted from the read pulse. The disc discriminating means 52 discriminates the disc type based on the data obtained by the demodulation operation in the data separator 51. This determination method is as follows, for example. (1) Disk 2 mounted on turntable 22
1 is rotated at the initially set 360 rpm, the head 25 is positioned at track zero T00, and the media ID data written therein is read. (2) When the media ID data can be read in the above steps, the host uses the read data as media information as it is. (3) When the media ID cannot be read in the above step (1), 1.
It determines that the disc is a 1.44 MB type 2HD disc other than the 25 MB type, and issues a mode switching command.

The mode switching command obtained from the disc discrimination result is sent to the read gate signal generating means 53. The read gate signal generating means 53 converts the drive select signal generated by the drive select signal generating means 54 shown in FIG. 6A from a high level (H) indicating non-driving of the FDD to a low level (L) indicating driving. First, second and third delay times T1, T2, T based on time points t1, t5, t7.
3 Generates a read gate signal that switches to a low level to allow read later. The first delay time T1 is generated by the conventional method and indicates the head load time HLT.
The delay time T2 is a head load time including mode switching information for setting the rotational speed of the disk 21 to 300 rpm, and the third delay time T3 is 3
Head row including mode switching information for 60 rpm
It is dead time. As an example, T1 is 50 msec, T2 is 150 msec, T3 is 200 msec, and T1 to T3
Is set in the range of 0 to 254 msec.

The head load signal generating means 55 generates a head load signal in synchronization with the drive select signal generating means 54 as shown in FIG. That is, the head load signal generating means 55 changes the drive select signal to a low level indicating the head load in synchronization with the change times t1, t5, and t7 from the high level to the low level. Therefore, FIG.
The read gate signal (C) has a predetermined delay time T1, T2, T3 from the point of time when the head load signal shown in FIG.
become. In addition, DC6a for built-in FDD and external FDD
When the host apparatus 1 is in the standby state, the use FDC 11 periodically checks the state of all connected FDDs for a change in state. This is called a well-known “drive scan function”, and at this time, the drive select signal DS is generated in a short cycle. FIG.
This is the non-driving state of t0 to t1 and t4 to t5, in which the drive select signal DS is strictly generated. Here, the drive scan state is deliberately equivalent to the "non-driving state". In other words. Therefore, the driving and non-driving of the drive select signal in the present application means substantial driving and non-driving.

The write gate signal generating means 56 generates a write gate signal indicating a period during which data writing is permitted based on the drive select signal of the drive select signal generating means 54 and a read output (not shown) of a track format. The MFM / FM mode designation signal generating means 57 outputs an MFM / FM mode designation signal for distinguishing whether data on the disk 21 is MFM or FM. Note that various signal generating means 53, 54, 55, 56, 57
Are connected to the terminals 36, 38, 39, 33, and 37 of the FDD in FIG. The host device 1 has various means other than those shown in FIG. 4, but these are omitted. Although the host device 1 is configured to include a CPU, a memory, and the like, FIG. 4 equivalently shows various signal generating means.

FIG. 5 shows the mode determination circuit 41 of FIG.
The mode determination circuit 41 includes a NOT circuit 60, a NOR gate 61, a clock generation circuit 62, a counter 63,
It comprises a T circuit 64 and a D flip-flop 65. N
The first input terminal of the OR gate 61 is a drive select signal input terminal 38, the second input terminal is a head load signal input terminal 39, and the third input terminal is a read gate signal input terminal 36 via a NOT circuit 60. , And the output terminal is connected to the clear terminal CLR of the counter 63. The clock generation circuit 62 is connected to the clock input terminal CK of the counter 63. The counter 63 is NOR
When the gate 61 counts clock pulses during the high level period, generates a first pulse from the first output terminal Q1 when counting the second delay time T2, and generates a first pulse when counting the third delay time T3. A second pulse is generated from the second output terminal Q2. The data input terminal D of the D flip-flop 65 is connected to the ground, and the preset input terminal PR is NOT.
The circuit 64 is connected to the first output terminal Q1 of the counter 63, and the clock input terminal CK is connected to the second output terminal Q1 of the counter 63.
The clear terminal CLR is connected to the initialization circuit 42 in FIG. 3, and the Q output terminal is connected to the motor control and drive circuit 24 in FIG. Note that the clock generation circuit 62 may also be used as another circuit.

[0022]

[Operation] When the power supply of the FDD is turned on at time t0 in FIG. 6, a reset pulse is generated from the initialization circuit 42, and
Of the flip-flop 65 is cleared (reset), and the output terminal Q goes low as shown in FIG. The low level of the output terminal Q of the flip-flop 65 indicates 360 rpm of the disk 21 and the high level is 300 rpm.
Is shown. Therefore, the rotation speed of the disk 21 at the time of initialization is 360 rpm.

At time t1, as shown in FIGS. 6A and 6B, the drive select signal DS and the head load signal HLD
Changes from a high level to a low level, the NOR gate 6
All three inputs 1 go low and the output goes high. Thus, the clear state of the counter 63 is released, and the counter 63 starts counting clock pulses. When the read gate signal (C) goes low at the time t2, the output of the NOR gate 61 goes low, and the counter 63 enters the clear state. The period from t1 to t2 is the first
Delay time T1 (about 50 msec) of the counter 6
No output pulse can be generated from the first and second output terminals Q1 and Q2. Therefore, the output terminal Q of the D flip-flop 65 becomes 360 as shown in FIG.
kept at low rpm levels. The first delay time T1 is the head load time HLT, and the head load means 40 composed of a plunger solenoid or the like starts operating at time t1, and brings the head 25 into contact with the disk 21 before time t2. The head 25 is positioned at track zero T00 by the recalibration operation when the power is turned on, and starts reading the media ID data of track zero T00 from time t2. If 2DD type or 2HD 1.25MB
If the medium ID data is read by the disk discriminating means 52 in FIG. 4 because a formatted disk of the type is inserted, it is determined that the disk 21 has a rotation speed suitable for the medium (disk). FDD
No speed switching of the motor 23 is performed.

On the other hand, since a formatted disk of 1.44 MB type of 2HD is inserted, media I
If the D data cannot be read, a read gate signal RG having a second delay time T2 is generated by the host device 1 before t5 in FIG. 6 and sent to the FDD 4. The counter 63 in FIG. 5 is activated at the time point t5 in the same manner as at the time point t1.
Start counting clock pulses. Since t5 to t6 are set to the second delay time T2 (150 msec),
At time t6 from the first output terminal Q1 indicating the time T2, FIG.
The first pulse is generated as shown in (D). As a result, the flip-flop 65 is preset, and this output terminal Q becomes a high level indicating 300 mrpm at t6 as shown in FIG. 6F, and the motor control and drive circuit 2 shown in FIG.
In response, the motor 4 rotates the motor 23 at 300 rpm. As a result, it becomes possible to read the media ID data from the track zero of the disk 21. Therefore, the media ID data is read, the media is confirmed,
After that, the data is read.

After that, the disk 21 is replaced before t7, and a 2DD type or 2HD 1.25 MB type formatted disk (360 rpm disk)
If the disk ID is loaded, the disk 21 is continuously rotated at 300 rpm from time t6.
Data cannot be read, and the host device 1 outputs the read gate signal RG having the third delay time T3 to t.
7 Occurs as shown below. Mode determination circuit 4 in FIG.
The counter 63 starts counting clock pulses at time t7 in the same manner as at times t1 and t5. At time t8 when the second delay time T2 has passed, the first counter 63 outputs the first pulse from the first output terminal Q1.
Output pulse. However, since the flip-flop 65 is preset by the first pulse at time t6, the state of the flip-flop 65 does not change at time t8. At time t9, the counter 63 sets the third delay time T
When the counting of 3 is completed, the second output terminal Q2
As shown in (E), a second pulse is generated, which is input to the flip-flop 65 as a clock pulse, the low level of the data input terminal D is read, and the output terminal Q is set to t.
At time 9, the disk goes low, indicating a 360 rpm disk, as shown in FIG. In response, the motor control and drive circuit 24 rotates the motor 23 at 360 rpm. As a result, the media ID data can be read, the media ID data is read, the medium is checked, and then the data is read at this rotation speed.

As apparent from the above description, in the system shown in FIG. 3, the rotation speed of the motor 23 is set to 360 and 3 on the FDD 4 side.
Automatic switching of the number of revolutions can be achieved without providing a manual switch for setting 00 rpm. Also,
The mode switching signal can be transmitted as the read gate signal line without providing a special mode switching signal line between the host device 1 and the external FDD 4. That is, the system can be configured using the existing interface, and an increase in the cost of the system can be suppressed.

[0027]

Second Embodiment Next, a computer system according to a second embodiment will be described with reference to FIG. Since the system of the second embodiment is equivalent to a part of the system of the first embodiment, FIG. 7 shows only the changed portions, and shows substantially common portions. Not.

In the second embodiment, the present invention is applied to mode switching of an externally mounted 5.25 inch FDD. There are two types of 5.25 inch floppy disks, 2DD type and 2HD type. Switching of the number of revolutions is not often required at the time of reading / writing. However, switching of the filter constant in the read circuit 29 and switching of the write current in the write circuit 30 are often performed. Is necessary. Therefore, in this embodiment, the output line of the mode determination circuit 41 is connected to the read circuit 29 and the write circuit 30 as shown in FIG. The read circuit 29 includes an amplifier 71, a filter 72, and a differentiator 73.
And a known circuit comprising a zero volt comparator 74 and a read pulse forming circuit 75. The filter 72 corrects the reproduced waveform given to the differentiator 73, and responds to the signal for distinguishing the inner track from the outer track given from the line 76 even in the case of the same type of disc. The filter is configured to change the filter constant, and is configured to switch the constant according to the 2DD type disk and the 2HD type disk. The mode determination circuit 41 generates an output for distinguishing between the 2DD type and the 2HD type, and in response to this, the constant of the filter 72 and the write current are switched.

5.25 inch type floppy disk 2
The method of discriminating between the DD type and the 2HD type is described in 3.
The discrimination method between the 5-inch 2DD type or 2HD 1.25 MB type and the 2HD 1.44 MB type is substantially the same. That is, when the power is turned on, the mode determination circuit 41
Is initialized to indicate the 2HD mode. Accordingly, when a 2HD type disk is inserted, the disk determination unit 52 of the host device 1
D data can be read, and 2HD type can be detected. When a 2DD type disc is inserted, the media ID is determined by the disc discriminating means.
Since the data cannot be read, it is determined that the type is the 2DD type. Thereafter, 2H in the first embodiment is used.
D, a read gate signal RG of a second delay time T2 is generated in the same manner as in the detection of the 1.44 MB type.
Send to D4. The mode determination circuit 41 of the FDD 4 detects the read gate signal RG of the delay time T2 in the same manner as in the first embodiment, and converts the mode switching signal for obtaining the 5.25 inch mode compatible with the 2DD type into the filter shown in FIG. Send to 72. As a result, the filter characteristics conform to the 2DD type, and accurate reading of the 2DD type disk becomes possible. Further, the level of the write current in the write circuit 30 is also switched to a value suitable for the 2DD type. Therefore, the same operation and effect as those of the first embodiment can be obtained by the second embodiment.

[0030]

[Modifications] The present invention is not limited to the above-described embodiment, and for example, the following modifications are possible. (1) Initializing circuit 42 is a disk sensor (not shown)
And an initialization signal (reset signal) may be generated when a disc is inserted into the FDD, and a predetermined rotation mode, for example, a 360 rpm mode may be always set when the disc is inserted. (2) Instead of carrying the mode switching information on the read gate signal, the mode switching information can be carried on the write gate signal. In this case, the write gate signal input terminal 33 is connected to the read gate signal input terminal 3 as shown by a broken line in FIG.
6 is connected to the mode determination circuit 41 instead of 6. On the host device 1 side, as shown in FIG. 4, the disk discriminating means 52 is connected to the write gate signal generating means 56 as shown by a broken line, and the write permission time of the write gate signal is changed to use this as the mode switching information. . (3) The present invention can be applied to such switching if there is a need for switching in addition to the rotation speed of the motor 23, the filter, and the write current. (4) The present invention is applicable even if the external FDD 4 does not have a head-load means for responding to a head-load signal. That is, the disk 21 is provided without the head means.
The head 25 can be configured to contact the disk 21 immediately in response to the insertion. In this case, in the case of FIG. 3, the FDD 4 uses only the head load signal of the host device 1. In many cases, the host device 1 has a built-in head load signal generating means to cope with both the FDD having the head load means and the FDD not having the head load means. (5) A configuration in which the input line 39 of the head load signal HLD is removed from the NOR gate 61 of FIG. In this case, the disc is determined based on the relationship between the drive select signal DS and the read gate signal RG.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a computer system according to a first embodiment.

FIG. 2 is a block diagram illustrating a configuration of a host device of FIG. 1;

FIG. 3 is a block diagram showing an external FDD of FIG. 1;

FIG. 4 is a block diagram showing a means for generating a mode switching signal in the host device of FIG.

FIG. 5 is a block diagram showing a mode determining circuit of FIG. 3 in detail;

FIG. 6 is a waveform chart showing changes in the state of each part and the disk rotation motor in FIG. 5;

FIG. 7 is a block diagram illustrating a relationship between a mode determination circuit, a read circuit, and a write circuit according to the second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Host device 4 External 3 mode FDD 41 Mode determination circuit

Claims (4)

(57) [Claims] 1. A disk rotation device configured to be able to detachably mount a plurality of types of recording medium disks, and a signal conversion is performed by a relative scanning motion between the disk mounted on the rotation device. A signal conversion head, read and / or write means for processing a read and / or write gate signal connected to the signal conversion head, and head loading means for bringing the signal conversion head into contact with the disk. In an information processing apparatus comprising: an information storage device having: and a host device connected to the information storage device, the host device determines the plurality of types of recording medium disks, and discriminates the plurality of types of recording medium disks. Means for generating a mode switching command signal indicating switching of the mode of the information storage device according to: And a head load signal generating means for supplying the read and / or write to the head load means with a first delay time with respect to a time point at which the head load signal changes from a non-load state to a load state. In addition to generating a read and / or write gate signal to permit read and / or write in the means, the first delay time may be longer than the first delay time in response to the mode switching command signal indicating mode switching. Generating a read and / or write gate signal to allow read and / or write with a long second delay time and providing respective read and / or write gate signals to said read and / or write means Read and / or write gate signal generating means, wherein the information storage device is configured to read and / or write gate signals. A mode switching detecting means for detecting mode switching information based on whether or not the signal has the second delay time. The mode switching detecting means includes a mode of the disk rotating device and the read and / or read mode. An information processing apparatus configured to switch and control one or both of the modes of the writing means. 2. The information processing apparatus according to claim 1, wherein the host device further includes a drive selection signal indicating a drive period and a non-drive period of the information storage device. The head load signal is changed from non-load to load in synchronization with the change from the non-load period to the drive period, and the read and / or write gate signal generation means switches the drive select signal from the non-drive period to the drive period. The information processing apparatus according to claim 1, wherein the first and second delay times are configured to start in synchronization with the conversion. 3. The information storage device according to claim 1, wherein said information storage device has no head loading means for responding to said head loading signal, and said head comes into contact with said disk when said disk is mounted on said rotating device. The information processing apparatus according to claim 1, wherein: 4. A signal conversion is performed by a relative scanning motion between a disk rotating device configured to be able to detachably mount a plurality of types of recording medium disks and a disk mounted on the rotating device. An information storage device having a signal conversion head, a read and / or write means for processing a read and / or write gate signal connected to the signal conversion head, and a host device connected to the information storage device Wherein the host device determines the plurality of types of recording medium disks and generates a mode switching command signal indicating a mode switching of the information storage device due to a difference between the plurality of types of recording medium disks. Means for generating a drive select signal indicating a drive period and a non-drive period of the information storage device. Signal generation means, and a read and / or write means in the read and / or write means having a first delay time with respect to a time point at which the drive select signal changes from a state indicating a non-driving period to a state indicating driving In addition to generating a read and / or write gate signal for permitting a write, the first mode is switched in response to the mode switching command signal indicating mode switching.
Generating a read and / or write gate signal so as to permit read and / or write with a second delay time longer than the delay time of the read and / or write gate signal. Or a read and / or write signal generating means for supplying the read and / or write signal to the write means.
A mode switching detecting means for detecting a mode switching based on whether or not the mode signal has the second delay time, wherein the mode switching detecting means is configured to determine a mode of the disk rotating device and the mode. An information processing apparatus configured to switch and control one or both of modes of read and / or write means.