JP2754264B2 - Data writer - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data writing device in a floppy disk data copy machine or the like.

<Conventional example> Generally, when writing new data to a floppy disk (hereinafter referred to as "FD") using a copying machine or the like, first, for each track, first, in the first rotation of the disk, data in each sector is read. Initialization is performed by writing format data such as ID information, and then recording data is written into each sector at the second rotation of the disk.

In this case, as shown in FIGS. 4 and 5, all data to be written is output as write data from a floppy disk drive controller circuit (hereinafter referred to as "FDC") 10 in the write circuit, and Through a floppy disk drive circuit controlled by a gate signal
It is provided to be written on the FD.

That is, the data signal to be written and the write gate signal for control are output at the timings shown in FIGS. 5A to 5D, and writing such as copying is performed using one FDC 10. First, format information is output in the first rotation of the FD to initialize the track, the format information is read from the initialized FD in the second rotation, and the read data is fed back to the FDC10 as a confirmation signal. While writing the recording data portion in each sector.

<Problems to be Solved by the Invention> However, according to the above-described writing method using one FDC, it is necessary to use two FDs to complete writing to one track.
Since it is necessary to rotate the disk, there is a limit in reducing the writing speed when the copying speed of the entire FD is to be increased, which is a problem.

That is, even if a mechanical improvement or a software improvement of each device in the writing circuit is added, the time restriction caused by rotating the FD twice cannot be removed.

Therefore, it is conceivable that both the format information and the recording data are simultaneously written during one rotation of the FD.
In such a case, a commercially available FDC cannot be used unlike the above-described device, so that it was necessary to assemble the entire writing circuit as a dedicated circuit with high development cost and time.

<Means for Solving the Problems> In order to solve the above-mentioned problems, a data writing device according to the present invention uses a device for writing data to a floppy disk using an FDC. A first FDC for outputting with the first write gate signal as the first write data, and reading the first write data as read data, and only the recording data among them is the second write data, and the second write gate signal With the second FDC to be output together with all the signals from the first FDC and the second FDC simultaneously, while giving priority to the signal of the second write gate, the first write data and the second write data are The third write data is synthesized by combining the signals of the first write gate and the second write gate. And a synthesizing circuit for outputting to the floppy disk drive circuit as a signal of the same format, and the format data and the recording data on one track are provided so as to be writable simultaneously during one rotation of the floppy disk. " And `` In a device for writing data to a floppy disk using FDC, a first FDC for outputting format data and recording data in a sector together with a first write gate signal as first write data, and the first write data Is read as read data, and only the recording data is read as the second write data, and the second FDC for outputting the second write data together with the second write gate signal.
And simultaneously input all signals from the second FDC, while giving priority to the signal of the second write gate,
A floppy disk drive circuit that combines the first write data and the second write data into a third write data signal, and combines the first and second write gate signals into a third write gate signal The first write data is input while being interposed in the reading circuit to the second FDC, and the first read data is read by the disk drive circuit at the second rotation of the disk. Connect to enable input, selectively switch any data signal, and use the second FD as the second read data.
And a switching circuit provided so as to be able to output to C.
A circuit for writing simultaneously during one rotation of the disk, and a circuit for writing by dividing the format data and the recording data while rotating the disk twice ".

<Operation> Format information and recording data (sector data) are output to the switching circuit as write data from the first FDC, but are also output to the second FDC.
In the second FDC, this is taken in as read data, and only the recording data is outputted to the switching circuit as write data. The switching circuit inputs signals from the above two FDCs, outputs write data as write data and outputs a write gate as a write gate in a normal state, but writes when the signal of the write gate from the second FDC is valid. The data and the write gate are output with priority given to the write data and the write gate, respectively.

Therefore, the write data output to the disk drive circuit becomes a composite signal in which only the recording data portion of all the information from the first FDC is replaced with the write data from the second FDC, and the format data on one track is obtained. And recording data can be written collectively during one rotation of the FD.

<Example> Next, the present invention will be described in more detail with reference to the example shown in Figs.

FIG. 1 shows a first embodiment. Reference numerals 1 and 2 denote first and second FDCs, each of which uses a commercially available FDC as a component of an FD copy machine, a personal computer, or the like, and uses a central processing circuit (not shown; hereinafter, referred to as "CPU").
Connected to and under its control. A switching circuit 3 receives a write data signal and a write gate signal output from the first FDC and receives a second FD signal.
A write data signal and a write gate signal output from C are input, and the combined signal is output as a write data signal and a write gate signal. Reference numeral 4 denotes a floppy disk drive circuit.

Here, the format information and the recording data in the sector are output from the first FDC 1 to the switching circuit 3 as write data, but are also output to the second FDC 2 at the same time. After reading this as read data, the second FDC 2 outputs only the recording data portion to the switching circuit 3 as write data.

The switching circuit 3 receives a signal from the two FDCs, and switches the signal as follows to output a composite signal. That is, the switching circuit 3 outputs the write data as the write data when the write gate from the first FDC1 is effectively input, but gives priority to the write data from the second FDC2 when the signal is input. , Write data and write gate are switched to output as write data and write gate, respectively.

Thus, the write data output to the disk drive circuit 4 outputs the format information of the entire information from the first FDC1 as it is, and the recording data portion in the sector is the write data from the second FDC2. Is replaced with the synthesized signal.

Therefore, the data signal to be written and the control write gate signal are output at the timings shown in FIGS. 2A to 2G, and both the format data and the recording data on one track are output. It can be written all at once during one rotation of FD.

FIG. 3 shows another embodiment. This has a circuit configuration that enables to select and switch between the writing method according to the present invention and the conventional writing method.

That is, in addition to the configuration of the first embodiment, the switching circuit 5 is additionally provided in the circuit for reading the first write data into the second FDC, and the drive circuit 4 is connected to the switching circuit 5, thereby enabling the disc to be read. The first read data ′ read by the disk drive circuit 4 can be input in the second rotation.

Thus, in the case of the writing method according to the present invention, the circuit is connected by the switching circuit 5 so as to output the first read data to the second FDC 2, while in the case of the conventional writing method, the switching circuit 5 is switched. A circuit for outputting the first read data 'from the drive circuit 4 to the second FDC2 is formed.

Therefore, the writing method can be arbitrarily selected at the time of use, so that when copying to a new unformatted FD, the method according to the present invention can be adopted, and copying is performed to an already formatted FD. If necessary, the switching circuit 5 can be switched to perform processing by the conventional writing method, which is convenient.

<Effects> According to the present invention described above, information on one track can be simultaneously written during one rotation of the FD, so that double processing of writing while rotating the FD twice as in the related art can be performed. There is no need to do it.

Therefore, writing to the FD becomes faster, so the time required for data copying etc. can be drastically reduced, and simple switching between two commercially available FDCs without adding expensive and complicated dedicated circuits instead of FDCs Since it is only necessary to connect circuits, it can be produced and provided at extremely low cost.

[Brief description of the drawings]

FIG. 1 is a block circuit diagram showing an embodiment of a writing device according to the present invention, FIGS. 2 (a) to 2 (g) are timing charts for explaining the operation order, and FIG. 3 is another embodiment. FIG. 4 is a block circuit diagram showing a conventional system, and FIGS. 5A to 5D are timing charts showing the operation.

Claims (2)

(57) [Claims] An apparatus for writing data to a floppy disk using an FDC, comprising: a first FDC for outputting format data and recording data in a sector as first write data together with a first write gate signal; Read one write data as read data,
A second FDC for outputting only the recording data among them as the second write data and outputting it together with the second write gate signal
And simultaneously inputting all of the signals from the first FDC and the second FDC, and combining the first write data and the second write data while giving priority to the signal of the second write gate to generate the third write data. And a synthesizing circuit for synthesizing the signals of the first write gate and the second write gate and outputting the synthesized signal to the floppy disk drive circuit as a signal of the third write gate. A data writing device characterized in that data and recording data are provided so as to be written simultaneously during one rotation of a floppy disk. 2. An apparatus for writing data to a floppy disk using an FDC, comprising: a first FDC for outputting format data and recording data in a sector as first write data together with a first write gate signal; Read one write data as read data,
A second FDC for outputting only the recording data among them as the second write data and outputting it together with the second write gate signal
And simultaneously inputting all of the signals from the first FDC and the second FDC, and combining the first write data and the second write data while giving priority to the signal of the second write gate to generate the third write data. A combining circuit for combining the signals of the first write gate and the second write gate and outputting the combined signal to the floppy disk drive circuit as a signal of the third write gate; The first write data is input to the disk while the first read data read by the disk drive circuit is input in the second rotation of the disk, and any one of the data signals is selectively switched. And a switching circuit provided so as to be able to output to the second FDC as the second read data. Circuitry for writing simultaneously during one rotation of the click, the data writing device being characterized in that arranged to be switched and a circuit for writing by dividing the recording data and the format data while 2 rotating the disk.