JPS6113315B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a display device for a cassette-shaped magnetic bubble memory device.

Magnetic bubble utilization devices that use magnetic bubble memory to store information, perform logical operations, etc. are nonvolatile,
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, making it suitable as terminal equipment memory. There are very high expectations for its future use. Particularly when employing a magnetic bubble as a storage medium for a terminal device memory, for example a portable data recorder, the most important feature among the above-mentioned characteristics is that it is small and lightweight. In view of this background, a method has recently been devised in which the magnetic bubble memory is separated from the main unit comprising its drive circuit, reading circuit, etc., and a cassette-shaped magnetic bubble memory device is attached to and removed from the main unit. With this method, information can be easily carried around, and due to the nature of magnetic bubble memory, a relatively large amount of information can be stored in a compact case, so information can be input directly to the central processing unit at the site where the data is generated. can be created,
Further effects are expected in terms of streamlining administrative processing.

FIG. 1 is a diagram for explaining one circuit configuration used in this type of system. In the figure, 1 indicates a cassette-shaped magnetic bubble memory device, and 2 indicates the main unit. Reference numeral 3 denotes a bubble chip, which is equipped with various functional parts such as a magnetic bubble generator G, a divider SP, a detector S, and an eraser A, but it is the same even if it has a major/minor loop configuration. The figure shows a single loop configuration. 4 is a connector, and 5 is a rotating magnetic field generating coil consisting of an X coil and a Y coil arranged so as to cover the bubble chip 3. 6 is a connector corresponding to the connector 4 on the cassette 1 side, 7 is a coil drive circuit for supplying a sine wave current or a triangular wave current to the coil 5 to generate a rotating magnetic field along the bubble chip surface, and 8 is a bubble reader. Circuit 9 is a magnetic bubble control circuit, which is a bubble writing circuit that applies current to the magnetic bubble generator G to generate bubbles, a circuit that applies current to the divider SP to divide the valve, and a circuit that applies current to the detector S to generate bubbles. 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. Reference numeral 10 denotes a control circuit for controlling the coil drive circuit 7, bubble reading circuit 8, and magnetic bubble control section 9 based on command signals from the central processing unit. Further, 11 is a register, and 12 is a current circuit. With this configuration, a portable cassette-shaped magnetic bubble memory device of relatively small capacity can be connected to the main unit via a connector and operated as required.

FIG. 2 is a perspective view of the cassette-shaped magnetic bubble memory device 1, in which the magnetic bubble memory is housed in a case 13 and electrically connected to the main device through a connector 14.

Generally, when a magnetic bubble memory device stops its operation, the rotating magnetic field for driving the bubbles must be stopped so that the magnetic bubbles stop at a fixed position in the propagation pattern. If not, the bubbles on the propagation pattern move or disappear, destroying information. However, since the cassette-shaped magnetic bubble memory device can be easily pulled out of the main unit or its cassette holder even during operation, information may be accidentally destroyed. The present invention has been devised to improve this drawback.

For this reason, the present invention provides a display device that displays the insertion and operation of a cassette-shaped magnetic bubble memory device that is removably inserted into a main unit including a bubble drive circuit and a bubble reading circuit.
The main unit is provided with at least one display element, the display element is turned on in response to an insertion signal of the cassette-shaped magnetic bubble memory device, and the lighting state of the display element corresponds to an operation signal of the cassette-shaped magnetic bubble memory device. Accordingly, the display element blinks or changes in brightness, thereby lighting up the display element to distinguish between confirmation of insertion of the cassette-shaped magnetic bubble memory device and operation.

Embodiments of the present invention will be described in detail below based on the accompanying drawings.

FIG. 3 shows a first embodiment. In the figure, numerals 15 and 16 are NAND circuits, and the first
A blinking signal 18 as shown in the figure is input to the input terminal 17 of the NAND circuit 15, a valve operation signal is input to the other input terminal 19, and the output terminal 20 is connected to the second NAND circuit 16. One input end 21 of
It is connected to the. A cassette connection signal is input to the other input terminal 22 of the second NAND circuit 16, and its output terminal 23 is connected to a lighting circuit (not shown).

The operation of this embodiment configured in this way will be explained using FIGS. 4 to 6. First, FIG. 4 shows the case where no cassette is inserted and there is no bubble operation signal. In this case, the second NAND circuit 1
Since the "L" level is input to the input terminal 22 of the input terminal 6, the output terminal 23 thereof becomes the "H" level regardless of the signal input to the other input terminal. As a result, the lighting circuit operates so as not to light up display elements such as display lamps.

Next, when the cassette is inserted, the second
The "H" level is input to the input terminal 22 of the NAND circuit 16. On the other hand, since there is no operating signal at the input terminal 19 of the first NAND circuit 15 and it is at "L" level, its output terminal becomes "H" level and the second NAND circuit 15
It is input to the input terminal 21 of the circuit 16. As a result, the output of the second NAND circuit 16 becomes "L" level. This causes the lighting circuit to operate and light up the display element.

Next, as shown in FIG. 6, when an operation signal is input to the first NAND circuit 15, the input terminal 19 becomes "H" level, and the other input terminal 17 becomes "L"/"H" level as a constantly blinking pulse 18. is input, the "H" and "L" levels obtained by inverting the blinking pulse 18 are outputted to the output terminal, and are inputted to the second NAND circuit 16. The other input terminal 22 of the second NAND circuit 16
Since it is already at the "H" level, its output becomes a blinking signal at the "L" and "H" levels. This causes the lighting circuit to blink the display element.

Next, a second embodiment is shown in FIG. In this case, a resistor 26, switches 24 and 25, and a lamp 28 which is a display element are connected in series from the power supply +V,
Furthermore, the resistor 27 is connected to the switch 24 and 2 from the power supply +V.
It is connected to the middle of 5. And switch 24
is operated by the bubble operation signal, and the switch 25
is operated by a cassette connection signal. Note that the resistance values of the resistors 26 and 27 are set to be approximately equal.

In the embodiment configured as described above, when no cassette is inserted, the switch 25 remains OFF, so the lamp 28 is turned off. Next, when a cassette is inserted, the switch 25 is turned on by the cassette connection signal, and the current flows through the lamp 28 via the resistor 27. As a result, the lamp 28 becomes half-lit with low brightness. Next, when a valve operation signal is input, the switch 24 is turned on, and the resistor 26 is connected in parallel with the resistor 27. This causes the lamp 28
will be fully lit with high brightness.

As explained above, in the magnetic bubble memory display device of the present invention, one display element changes from an off state to off/blinking, half-on/full-on, and lights up to distinguish between cassette insertion and bubble operation. Because of the display, the mounting space for the display element is small,
In addition, it is possible to warn against pulling out the cassette-shaped magnetic bubble memory during operation, thereby preventing information from being destroyed.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of one example of a magnetic bubble memory device, FIG. 2 is an external perspective view of a cassette-shaped magnetic bubble memory device, and FIG. 3 is a first embodiment of a display device for magnetic bubble memory according to the present invention. Configuration diagram, 4th
6 to 6 are explanatory diagrams of the operation, and FIG. 7 is a configuration diagram of the second embodiment. 15, 16...NAND circuit, 24, 25...Switch, 26, 27...Resistor, 28...Lamp.

Claims (1)

[Claims] 1. In a display device that displays the insertion and operation of a cassette-shaped magnetic bubble memory device that is removably inserted into a main device including a bubble driving circuit and a bubble reading circuit, the main device has at least one
A display element is provided, and the display element is turned on by an insertion signal of the cassette-shaped magnetic bubble memory device, and the lighting state of the display element blinks or changes in brightness depending on the operation signal of the cassette-shaped magnetic bubble memory device. A display device for a magnetic bubble memory, wherein the display element lights up to distinguish between confirmation of insertion of the cassette-shaped magnetic bubble memory device and operation.