JPS61198325A - Disc driving device - Google Patents

Abstract

PURPOSE:To shorten the queuing time for motor start by outputting a medium detection signal indicating that the start of the work is possible by the signal from a detecting means and the signal from a host-side control means. CONSTITUTION:The seek operation can be executed immediately in a host computer 2 when a medium detection signal 23 is inputted, and the road operation and the write operation can be executed when the rotation number of a motor reaches a certain value and an objective ID on a floppy disc is read. If a motor turn-on signal is transmitted preliminarily and a select signal is inputted to a floppy disc driving device 1 in the state where the floppy disc is inserted, the execution is started when a ready signal is detected by the computer 2. Thus, at the motor start time, the queuing time for disc insertion is shortened to a minimum.

Description

[Detailed description of the invention] [Technical field] The present invention relates to a disk drive.

[Prior Art] In a conventional disk drive device, for example, a device using a floppy disk, a ready signal is created as information containing at least the fact that the floppy disk is inserted and that it is rotating. When accessing the device, the system outputs a select signal to the device, checks for the presence of a ready signal, and performs various operations after confirming the presence of the ready signal.

Therefore, in a floppy disk drive, when starting the motor for rotating the floppy disk, the ready signal is not generated until the normal rotation speed is reached, and the host system can immediately start executing the floppy disk drive. The drawback is that it cannot be done.

[Object] An object of the present invention is to provide a disk drive device that eliminates the drawbacks of the conventional device as described above and reduces the waiting time when starting the motor.

[Embodiment] FIG. 1 shows the main parts of an embodiment of a floppy disk drive according to the present invention. In FIG. 1, 1 is a floppy disk drive and 2 is a host computer.

The floppy disk drive device 1 includes a media detection circuit 3 that uses an appropriate sensor to detect when a floppy disk is inserted into a predetermined position, a rotation detection circuit 4 that detects the rotation of a motor that rotates the floppy disk, and an interface. It has a circuit 5 and two AND gates 8 and 7.

The host computer 2 has a CPU 8. 9. A memory having a ROM and a RAM storing control programs and the like as shown in FIG. FDC (Floppy Disk Co.
controller) 10 and interface circuit 1
1.

The first AND gate 6 receives a signal from the rotation detection circuit 4 detecting that the motor is rotating, a signal from the media detection circuit 3 detecting that the floppy disk is inserted in a predetermined position, and a signal from the host When a select signal 25 from the computer 2 is input, a ready signal 24 is output to the host computer 2.

The second AND gate 7 outputs the media signal 23 to the host computer 2 when the signal from the media detection circuit 3 and the select signal 25 are input.

The host computer 2 outputs a motor-on signal 28 that turns on the motor in the floppy disk drive 1, and the interface circuit l! in the host computer 2 is output. and the interface circuit 5 in the floppy disk drive 1 exchange signals 27 with each other.

Next, the state of control regarding the host computer 2 and floppy disk drive 1 with the above configuration will be explained with reference to timing charts shown in FIGS. 2(A) and 2(B).

When the motor is started (in a state in which a floppy disk has been inserted into a predetermined position in the drive device), as shown in FIG. A motor-on signal is output from , and then a select signal 25 is input almost simultaneously.

Since the signal is output from the media detection circuit 3 immediately after the motor is started, the media detection signal 2 is output from the second AND gate 7.
3 is input to the host computer 2, at which point the host computer 2 is able to control the floppy disk drive 1. For reference, in the past, the index (
When the INDEX) pulse is detected several times or when the index pulse interval falls within a specified value (that is, after a considerable amount of time has elapsed since the media detection signal was output), the host computer can execute the control.

Next, when inserting a floppy disk (in a state where the motor is turned on in advance and a remote motor on signal is output), as shown in Figure 2 (B), the floppy disk is inserted into the specified position of the drive device. , a select signal 25 is input from the host computer 2 to the drive device in response to a signal from the media detection circuit 3 , and a media detection signal 23 is input from the second AND gate 7 to the host computer 2 . In this case as well, conventionally, as shown in the figure, the ready signal is input to the host computer after a considerable amount of time has elapsed from when the media detection signal was input.

The operation of the floppy disk drive device 1, which may be performed by the host computer 2, is a read operation.

There are seek and write operations. The lead operation is the third
As shown in Figure (A), after the motor is turned on, it is determined in step S1 whether there is a media detection signal, and if there is a signal, the process proceeds to step s2, where the IO on the floppy disk is read (read here refers to CRC check). (hereinafter referred to as read has the same meaning) is completed, and if completed, proceed to step S3; if not, repeat step S2. In step S3, reading data on the floppy disk is completed. If the read operation is finished, the read operation is finished, and if it is not finished, the process returns to step S2.

The seek operation is performed in step S1 as shown in FIG.
At step S2, it is determined whether there is a media detection signal, and if there is a signal, the process proceeds to step S2 and a seek operation is executed.

The light operation starts after the motor is turned on as shown in Figure 3 (C).
In step Sl, it is determined whether there is a media detection signal, and if there is a signal, the process proceeds to step S2, where it is determined whether reading of In on the floppy disk is finished, and if it is finished, the process proceeds to step S3, and if not, the process proceeds to step S2. Step S2 is repeated, and in step S3 data is written onto the floppy disk.

As described above, the host computer 2 can immediately execute the seek operation by inputting the media detection signal, and for the read and write operations, the motor rotation speed increases to a certain extent and the desired target on the floppy disk is detected. The process can be executed as soon as the ID is read, which is faster than the conventional case where execution is started after detecting a ready signal.

The above applies when starting the motor and when inserting a floppy disk (
The motor is already turned on), but if a motor-on signal has been sent in advance and a floppy disk is inserted, and the select signal is input to the floppy disk drive in such a state, Similar to the operation of the conventional device, execution is started when the host computer 2 detects a ready signal.

[Effect] As explained above, according to the present invention, it is possible to minimize the waiting time when starting the motor and when inserting a disk, which is useful when controlling the rotation of the motor frequently in an energy-saving system. A particularly effective disk drive device can be provided.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing the main parts of a floppy disk drive device according to the present invention, FIGS. 2(A) and (B) are timing charts of signals by the same device, and FIGS. 3(A), (B), and (C) is a flowchart of the operation of the device. DESCRIPTION OF SYMBOLS 1... Floppy disk drive device, 2... Host computer, 3... Media detection circuit. ? ...and gate, 23...media detection signal. 24... Ready signal. Figure 2 (A) Seven-ta motive force σ~

Claims (1)

[Scope of Claims] Detection means for detecting that a disc is inserted; and a signal from the detection means and a selection signal from the host-side control means are inputted to the host-side control means to detect the insertion of the disc. 1. A disk drive device comprising: means for outputting a media detection signal indicating that work related to the media can be started.