JPS6161196B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bubble memory unit in a magnetic bubble memory device in which a rotating magnetic field is driven only during access, and particularly to a bubble memory unit having an access indication.

Generally, a magnetic bubble memory device includes a plurality of bubble memory units, each of which is selected and controlled by a control device of the magnetic bubble memory device to be accessed.

However, conventional bubble memory units have
It had no indication that it was being accessed (eg, a lamp display as a visual indication).

This is inconvenient because maintenance personnel cannot confirm which of the plurality of bubble memory units is being accessed.

Particularly, for example, when debugging a test program for a control device, it is not possible to check the access status of each bubble memory unit, which is inconvenient for conducting failure isolation tests on bubble memory units.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the drawbacks of the conventional bubble memory unit described above and to provide a bubble memory unit having an access display that allows easy confirmation of access.

In short, one function related to a magnetic bubble memory device is to confirm which unit is being accessed in a device composed of multiple units related to a magnetic bubble memory unit. The aim is to provide an access display means for each unit, and this access display allows maintenance personnel to confirm which of the multiple bubble memory units is being accessed. When performing fault isolation, testing, etc. of magnetic bubble memory devices and bubble memory units,
This allows the efficiency to be greatly improved.

A bubble memory unit according to the present invention is a bubble memory unit of a magnetic bubble memory device that drives a rotating magnetic field only during access, and is provided with an access display means, and a drive start signal and a drive stop signal for a rotating magnetic field drive circuit, and a drive start signal and a drive stop signal for the rotating magnetic field drive circuit. By using a rotating magnetic field drive signal from the circuit or a start signal for the rotating magnetic field generation analog circuit of the rotating magnetic field drive circuit, at least by operating the access display means in a manner compatible with the bubble memory unit. This is to display access to the corresponding bubble memory unit.

Embodiments of the present invention will be described in detail below with reference to the drawings.

The figure is a circuit diagram of a bubble memory unit according to the present invention.

Here, 1 is a rotating magnetic field drive circuit, 10 is a rotating magnetic field drive start signal line, 11 is a rotating magnetic field drive stop signal line, 12 is a flip-flop, and 13 is:
14 is a display signal line; 15 is a rotating magnetic field drive signal line; 2 is an inverter; 3 is a display circuit; 30 is a light emitting diode; 31 is a resistor for terminating the light emitting diode; 4
Only audible display means, such as a buzzer, according to the invention are shown.

Next, the structure and operation of the bubble memory unit according to the present invention will be explained based on the drawings.

First, the rotating magnetic field drive circuit 1, the inverter 2, and the display circuit 3 are provided for each bubble memory unit, and the buzzer 4 connects each display signal line 14, which is its input, in multiple ways to connect multiple bubble memories. Commonly provided for all units.

Here, the inverter 2, display circuit 3, and buzzer 4 are related to display means for displaying access, and are each an example thereof.

When a bubble memory unit is accessed, a drive start signal is input to the drive start signal line 10 of the corresponding rotating magnetic field drive circuit 1, the flip-flop 12 is set, and its output, that is, the display signal line 14, is set to "1". ” will be displayed. Further, this output becomes a starting signal for the rotating magnetic field generating analog circuit 13, and causes the rotating magnetic field drive signal line 15 to send an output.

At the same time, the "1" display on the display signal line 14 is inverted by the inverter 2 and becomes a "0" display.
The signal is input to the display circuit 3. As a result, the light emitting diode 30 receives current from the +5V power supply through the resistor 31, emits light, and serves as an access indication for the corresponding bubble memory unit.

In addition, the “1” state of the display signal line 14 means that the buzzer 4
to indicate that one of the bubble memory units has been accessed.

Thereafter, when the necessary data transfer is completed and a drive stop signal is input to the drive stop signal line 11 of the rotating magnetic field drive circuit 1, the flip-flop 12 is reset, its output becomes "0" display, and the analog circuit 13 Stop the activation of the rotating magnetic field drive signal line 1.
There is no output from 5, and the rotating magnetic field stops.

At the same time, the "0" display on the display signal line 14 becomes "1" display by the inverter 2, and the display circuit 3
is input, and the light emitting diode 30 goes out.
Further, the buzzer 4 also stops sounding.

Note that the buzzer 4 is not necessarily used as a display means.
Bubble memory unit 1, although not required
When there are multiple bubble memory units 1 and one or more of them is accessed, first, the access display is detected by the buzzer 4, and then it is determined which bubble memory unit 1 has been accessed. Since the information can be confirmed using the light emitting diode 30, maintenance and inspection of the magnetic bubble memory device are further facilitated.

Further, in the above embodiment, the display signal is extracted using the input of the rotating magnetic field generating analog circuit 13, but the output thereof, that is, the rotating magnetic field drive signal or the drive start signal for the rotating magnetic field drive circuit 1 and the drive A stop signal may also be used.

As described above in detail, according to the present invention, by adding a simple display circuit, access to a bubble memory unit can be easily confirmed, and is particularly useful for testing magnetic bubble memory devices. The remarkable effect is that the efficiency can be greatly improved when executing.

[Brief explanation of the drawing]

The figure is a circuit diagram of a bubble memory unit according to the present invention. DESCRIPTION OF SYMBOLS 1... Rotating magnetic field drive circuit, 10... Drive start signal line, 11... Drive stop signal line, 12... Flip-flop, 13... Rotating magnetic field generation analog circuit, 14
...Display signal line, 15...Rotating magnetic field drive signal line, 2...
Inverter, 3...Display circuit, 30...Light emitting diode, 31...Resistor, 4...Buzzer.

Claims (1)

[Scope of Claims] 1. In a bubble memory unit of a magnetic bubble memory device that drives a rotating magnetic field only when accessing, an access display means is provided, and a drive start signal and a drive stop signal to a rotating magnetic field drive circuit, and a drive start signal and a drive stop signal from the rotating magnetic field drive circuit are provided. By using the rotating magnetic field drive signal of the rotating magnetic field driving circuit or the activation signal for the rotating magnetic field generation analog circuit of the rotating magnetic field driving circuit, at least operate the access display means in a manner compatible with the bubble memory unit, thereby responding to these signals. A bubble memory unit characterized by displaying access to the bubble memory unit. 2. The bubble memory unit according to claim 1, wherein the display means includes one for displaying in correspondence with the bubble memory unit and another for displaying in common with a plurality of bubble memory units.