JPH0337862A - Floppy disk device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a floppy disk device.

[Invention (already required)]

The present invention provides a floppy disk device that processes a floppy disk that can be formatted in a first format or a second format, by moving the position of a means for reading information recorded on a floppy disk,
The first method is configured to determine whether the floppy disk is formatted in the first format or in the second format based on information obtained from the reading means. This makes it possible to appropriately process floppy disks in a second format and floppy disks in a second format without confusing them.

[Conventional technology]

As a replaceable recording medium, floppy disks are extremely thin, lightweight, easy to store, easy to handle, and inexpensive, so they are used in many applications, such as in electronic still cameras.

FIG. 4 is a diagram showing an example of a floppy disk used for recording video signals of the electronic still camera described above, and is an example of a so-called 2-inch floppy disk (1) having a storage capacity of about IMB. The outer diameter of this floppy disk (1) is 47.0 mm, the trunk width T8 is 0.06 mm, and the track pitch T is 0.1 m.
m, the radius rho of the outermost track TR, is 20.0 m
m, radius rh of the innermost trunk TR1;

is 15.1nv, and the number of tracks is 50. Then, a directory is created on the outermost track TRo.

In addition to the above-mentioned electronic still camera, there are also 2-inch floppy disks for so-called personal word processors. This is used to record data signals rather than video signals such as those for electronic still cameras, but it is used to record data signals, such as the outer diameter of the floppy disk, trunk width, track pitch, radius of the outermost track, and innermost track. The radius is the same as the example in FIG. 4, and therefore the number of trunks is 50, the storage capacity is approximately IMB, and the directory is also created on the outermost trunk.

[Problem to be solved by the invention]

By the way, in the case of the above-mentioned floppy disk (1) for an electronic still camera, there is some leeway in the track creation area. In other words, there is room to create tracks in an area further toward the outer circumference of the disk (1) than the outermost circumferential track TR. However, if a video signal is recorded on the outer circumferential side of the outermost trunk TR, , fluctuations will occur in the reproduced image. cannot be created.

However, if the data is not a video but data, sufficient recording and reproduction is possible even if the tracks are created on the outer side of the outermost track TR.

Therefore, for recording data, we changed the above-mentioned 2-inch floppy disk (1) to a single-sized floppy disk (1) by increasing the number of tracks without changing the track width T and track pinch T''. There is also an idea to make it possible to have a large capacity.

That is, for example, as shown in FIG. 3, the main diameter r of the innermost track TR,2 of the floppy disk (1) is 13.1
The radius r2 of mrR, outermost track TR, is 22.0.
mm, the number of tracks is 90, and the storage capacity can be approximately 2 MB. The directory is created on the outermost track TRoz.

Now, if it is possible to increase the capacity of the floppy disk (1) as described above, even if the recording medium has exactly the same shape, the content 1 (IMB) and the large capacity (2 qB) can be changed. There are two types of formats: In this case, the floppy disk (1)
However, it is necessary to somehow determine whether the capacity is small or large.

Therefore, a method can be considered in which a detection window is provided in the case of the floppy disk (1) to determine whether it is a small capacity disk or a large capacity disk. However, if this is done, the following problems arise.

That is, (1) The floppy disk (1) whose case is provided with a large capacity detection window is formatted into a large capacity one. (In this case, the directory has radius r2 of 22.
A track T Ro z of 0 mm is created. )(2)
Next, the floppy disk (1), which was formatted as a large capacity disk, is mistakenly formatted as a small capacity disk. Then, the directory has a radius r2° of 20. Omm's tiger.

It exists in two tracks: TR,2 with a radius of 22.0 mm.

(3) The above-mentioned floppy disk (1) with directories created on tracks TRo and TR02 is treated as a large capacity disk according to its detection window, but the floppy disk (1) actually has a small capacity. Since it has been formatted, the data on the disk (1) will be destroyed.

This invention attempts to solve the above problems.

[Means for Solving the Problem] Therefore, the present invention provides a means for reading information recorded on a floppy disk, a means for moving the position of the reading means, a means for moving the position of the reading means by the moving means, The floppy disk is provided with a control means for determining whether the floppy disk is in a small capacity format or a large capacity format based on information recorded on the floppy disk supplied through the reading means. .

[Function] It is possible to appropriately process a small-capacity format floppy disk and a large-capacity format floppy disk without confusing them.

〔Example〕

FIG. 1 is a block diagram of one embodiment of the present invention.

In the figure, (2) is a magnetic head, (3) is a directory reading device, and (4) is a control device.

Further, (5) is a disk insertion detection device, and (6) is a head moving device.

Next, the operation of the apparatus shown in FIG. 1 will be explained using the flowchart shown in FIG.

First, in step (100), the disk insertion detection device (5) detects that the floppy disk (1) is inserted, and sends the detection signal S0 to the control device (4).
). Then, the process proceeds to the steno knob (101), and the control device (4) sends the signal S3 to the head moving device (6).
), and the head moving device (6) moves the magnetic head (2) to positions 1 to 4 when the floppy disk (1) is in a small capacity format.
It is moved to the position of track TR, , in the figure. Next, the process proceeds to step (102), in which the signal S1 from the magnetic head (2) is supplied to the directory reading device (3), and the signal S2 is supplied from this reading device (3) to the control device (4). Then, the process proceeds to step (103), where the control device (4) determines whether a directory exists or not according to the signal S2. And this step (1
In step 03), if it is determined that a directory exists, the process advances from step (103) to step (104). Then, a signal S6 is supplied from the control device (4) to a small-capacity data processing device (not shown), and the small-capacity data is processed.

Further, if it is determined in step (103) that there is no directory, step (103) to step (1
05) Proceed. Then, in this step (105), the signal S3 is supplied from the control device (4) to the 7D moving device (6), and the magnetic head (2) selects the directory in the case of a large capacity format of a floppy disk (+). 3, i.e., trunk TR in FIG.

is moved to the position of Then, the process proceeds to step (106), where the signal S1 from the magnetic head (2) is supplied to the directory reading device (3), and this reading device (3)
A signal S2 is supplied to the control device (4).

Then, the process proceeds to the steno knob (107), and the control device (4) determines the presence or absence of a directory in accordance with the signal S2. If it is determined in this step (107) that a directory exists, the process advances from step (107) to step (108). Then, a signal S is sent from the control device (4) to the large-capacity data processing device (not shown).
, and large-capacity data processing is performed.

Further, if it is determined in step (107) that there is no directory υ, step (107) to step (
Proceed to step 109). Then, a signal S4 is supplied from the control device (4) to an error display device (not shown), and an error is displayed.

Note that whether the format is small or large, the radius of the directory is 20.0m.
It is also possible to record the information in the track TR, . m and determine whether it is a small-capacity one or a large-capacity one, according to the contents of the directory.

However, in this case, in a large-capacity format, the track numbers range from 0 to 69 from the 20.0 mm radius track TR, , to the innermost track TR, □.
and the outermost periphery 1-rack TR, with a radius of 22.0 mm.

Since it is necessary to set the range from 70 to 90 to a track with a radius of 20.1 mm, control becomes somewhat complicated.

C. Effects of the Invention] Thus, according to the present invention, there is provided an apparatus for processing Frombie disks of the same shape that can be formatted in two types of formats, a small capacity format and a large capacity format, The magnetic head is moved to the position where a small-capacity format directory is recorded, and the presence or absence of that directory is determined.
If not, the magnetic head is moved to the position where a large-capacity format directory is recorded, and the presence or absence of that directory is determined. It is possible to properly handle two types of floppy disks without confusing them. Furthermore, there is no need to perform processing such as providing a detection window on the floppy disk case to determine whether it is a small-capacity floppy disk or a large-capacity floppy disk.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a flowchart, and FIGS. 3 and 4 are explanatory diagrams. (1) is a floppy disk, (2) is a magnetic head, (
3) is a directory reading device, (4) is a control device, (5) is a directory intrusion detection device, and (6) is a magnetic head moving device. Agent Hide Matsukuma Figure 1 @ Figure 2 a Sun Moon Country

Claims (1)

[Claims] A floppy disk device for processing a floppy disk that can be formatted in a first format or a second format, comprising means for reading information recorded on the floppy disk, and a position of the reading means. and a means for moving the reading means by the moving means, and formatting the floppy disk in the first format based on information recorded on the floppy disk supplied via the reading means. A floppy disk drive, comprising: control means for determining whether the diskette is formatted in the format of the floppy disk or the second format.