JPH0219556B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a magnetic bubble cassette (hereinafter referred to as a cassette) equipped with a magnetic bubble device that stores and transfers information by controlling magnetic bubbles, and Peripheral circuits for operating bubble devices,
The present invention relates to a cassette type magnetic bubble memory device connected via a connector.

Magnetic bubble utilization devices that use magnetic bubble memory to store information, perform logical operations, etc. are non-volatile,
It has various features such as high storage density, low power consumption, small size and light weight, and since it is a solid-state device that does not contain any mechanical elements, it has extremely high reliability and is used as a storage medium for terminal device memory. This is extremely advantageous compared to other storage media.

In order to take full advantage of such characteristics of magnetic bubble memory, a method has recently been devised in which the magnetic bubble memory is separated from the main unit to form a cassette, and the cassette is attached to and removed from the main unit. By adopting this method, just the portion containing information can be easily carried around, similar to storage media such as magnetic disks and magnetic tapes. Against this background, it is required to increase the storage capacity of the cassette as much as possible and to make the whole cassette compact.

[Conventional technology]

FIG. 2 is a diagram for explaining the circuit configuration used in this type of conventional system. 20 in the figure
indicates a cassette, and 30 indicates a main unit. 2
1 is a bubble chip with a magnetic bubble generator G and a divider
It has various functional parts such as SP, detector S, and eraser A. Although the figure shows a single-loop configuration, the same applies to a major-minor loop configuration. 22 is a connector, and 23 is a rotating magnetic field generating coil (hereinafter referred to as a coil) consisting of an X coil and a Y coil arranged so as to cover the bubble chip 21. In addition, the bubble chip 21 and the coil 23
is housed in a case together with a bias magnet (not shown) to form a magnetic bubble device.

31 is a connector corresponding to the connector 22 on the cassette 20 side; 32 is a coil drive circuit that supplies a sine wave current, triangular wave current, etc. to the coil 23 to generate a rotating magnetic field along the surface of the bubble chip;
3 is a bubble reading circuit; 34 is a magnetic bubble control circuit; a bubble writing circuit that energizes the magnetic bubble generator G to generate bubbles; a circuit that energizes the divider SP to divide bubbles; and 34, a circuit that energizes the detector S. The circuit includes a circuit for detecting the presence or absence of bubbles, and a circuit for energizing the eraser A to erase unnecessary bubbles. 35 is a control circuit that controls the coil drive circuit 32, bubble reading circuit 33, and magnetic bubble control circuit 34 based on command signals from the central processing unit; 36 is a register; and 37 is a power supply circuit.

By dividing the magnetic bubble memory device in this way, a relatively small capacity and portable cassette can be attached to the main unit and operated as needed.

[Problem that the invention seeks to solve]

In order to increase the capacity of a cassette without changing the storage capacity of the bubble chip, it is necessary to increase the number of magnetic bubble devices mounted on the cassette. However, the magnetic bubble generator G, splitter SP, detector S, eraser A, coil, etc. must be driven for each magnetic bubble device, and as the number of magnetic bubble devices increases, the number of contacts on the connector increases proportionally. Depending on the configuration, one connector may not have enough contacts, resulting in an increase in the number of connectors. In other words, the conventional dividing method is suitable for configuring relatively small capacity cassettes, but as soon as multiple magnetic bubble devices are mounted to increase the capacity, the external size of the cassette becomes proportionally larger. There is a problem. Furthermore, when multiple cassettes with increased capacity per cassette are inserted and used simultaneously in the main unit, it is necessary to access only the desired cassette. It is convenient to provide a cassette number assigning means for assigning a unique cassette number to the cassette and a number display for displaying the assigned number.

[Means for solving problems]

The above problem is solved by mounting a plurality of magnetic bubble devices including a bubble chip, a rotating magnetic field generating coil, and a bias magnet in a case, as well as a plurality of peripheral circuits necessary to operate the magnetic bubble devices. a connector for connecting the magnetic bubble cassette to an external circuit, a switch for setting a unique cassette number that differs for each cassette, a number display for displaying the cassette number, and an operation This problem is solved by the cassette type magnetic bubble memory device of the present invention, which is characterized by being provided with an indicator lamp for displaying the status.

[Effect]

By mounting the peripheral circuitry required to operate the magnetic bubble devices in the cassette, a cassette with a large number of magnetic bubble devices can be connected to the main unit using a connector with a small number of contacts, increasing the capacity of the cassette. becomes possible.
When using multiple such large-capacity cassettes at the same time, each cassette is assigned a unique cassette number and that number is displayed on the cassette itself, eliminating number setting errors and insertion errors, and ensuring that the recorded data is not lost. There is less risk of destroying it.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a diagram showing an embodiment of the cassette type magnetic bubble memory device according to the present invention, FIG. 1a is a diagram for explaining the circuit configuration, FIG. 1b is a front view of the cassette, and FIG. c is the front view of the cassette, the first
Figure d is a rear view of the cassette. Note that the same objects as in FIG. 2 are represented by the same symbols.

In Fig. 1a, bubble chip 21, coil 23
A coil drive circuit 32, a bubble reading circuit 33, and a magnetic bubble control circuit 34 are mounted on the cassette side along with a magnetic bubble device including a magnetic bubble device.
Control circuit 35, register 36, and power supply circuit 3
7 is mounted on the main device side.

The bubble chip 21 and the coil 23 are connected to the coil drive circuit 32, the bubble reading circuit 33, and the magnetic bubble control circuit 34 by a number of wires. Coil drive circuit 32, bubble reading circuit 33, and magnetic bubble control circuit 34
Bubble chip 2 that requires and is mounted on a cassette
1 and the number of coils 23 increases, the number of wires becomes immeasurable.

Compared to that, the number of wires connecting the coil drive circuit 32, bubble reading circuit 33, and magnetic bubble control circuit 34 to the control circuit 35, register 36, and power supply circuit 37 is small, and moreover, a common wire is used between them. Because they can be connected, even if the number of bubble chips 21 and coils 23 mounted on a cassette increases,
The increase in the number of lines connecting between them is extremely small.
Therefore, the capacity of the cassette can be increased and the whole can be made compact.

In Fig. 1b, bubble chip 21, coil 2
3, and a plurality (eight in the figure) of magnetic bubble devices 1 housing bias magnets (not shown) in a case, a plurality of (eight in the figure) coil drive circuits 32, a bubble reading circuit 33, and The magnetic bubble control circuit 34 is mounted on the same printed circuit board 2, and the printed circuit board 2 is attached to the case 3. In addition, the connector 22 is screwed onto the rear surface of the case 3, and is connected to the printed circuit board 2 and the connector 2.
2 are connected by, for example, a flexible printed board or the like. Furthermore, there is a handle 4 on the front of the case 3,
A lock mechanism consisting of a knob 5 and a lever 6 is installed, and when the knob 5 is rotated, the lever 6 protrudes from the case 3 and the cassette is fixed to the main unit.

In Fig. 1c, in addition to the above-mentioned handle 4 and knob 5, a number display 7 and a display lamp 8 are attached to the front of the cassette. The selected cassette number will be displayed. Further, the indicator lamp 8 indicates the operating status of the cassette by blinking the lamp. For example, the display lamp 8a lights up while the cassette is in operation. Further, if the temperature inside the cassette rises abnormally, the indicator lamp 8b lights up. Further, when writing is prohibited, the display lamp 8c lights up.

In addition to the above-mentioned connector 22, a switch 9 for setting a cassette number is attached to the rear surface of the cassette in FIG.

By providing a cassette number indicator and an indicator lamp on the front of the cassette in this way, the operating status of the cassette and which cassette is in operation can be easily known from the outside. [Effects of the Invention] As described above, according to the present invention, it is possible to provide a cassette-type magnetic bubble memory device in which the storage capacity of each cassette is increased and the entire device is compact.

[Brief explanation of drawings]

Fig. 1 is a diagram showing an embodiment of the present invention, Fig. 1a is a diagram for explaining the circuit configuration, Fig. 1b is a front view of the cassette, Fig. 1c is a front view of the cassette,
FIG. 1d is a rear view of the cassette, and FIG. 2 is a diagram for explaining the conventional circuit configuration. In the figure, 1 is a magnetic bubble device, 2 is a printed circuit board, and 3
is the case, 4 is the handle, 5 is the knob, 6 is the lever, 7
is a number display, 8 is a display lamp, 9 is a number setting switch, 21 is a bubble chip, 22 is a connector,
23 is a coil, 32 is a coil drive circuit, 33 is a bubble reading circuit, 34 is a magnetic bubble control circuit, 35
is a control circuit, 36 is a register, 37 is a power supply circuit,
respectively.

Claims (1)

[Claims] 1 A magnetic bubble is created by mounting in a case a plurality of magnetic bubble devices including a bubble chip, a rotating magnetic field generating coil, and a bias magnet, as well as a plurality of peripheral circuits necessary to operate the magnetic bubble device. A connector for configuring the cassette and connecting the magnetic bubble cassette to an external circuit, a switch for setting a unique cassette number that differs for each cassette, a number indicator for displaying the cassette number, and a display for indicating the operating status of the cassette. A cassette-type magnetic bubble memory device, characterized in that it is provided with an indicator lamp for displaying.