JPS5925309B2 - Initial setting method of magnetic bubble storage device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control method for initially setting the rotational position of the minor loop when the power is turned on in a magnetic bubble storage device using the minor loop-major loop method or the minor loop-major line method. .

Conventionally, in a magnetic bubble storage device that is configured to read J information at an arbitrary minor loop position when the power is turned on and initialize the rotational position of the magnetic bubble, when the drive power is cut off, the J information stored until then is read out. The rotational position of the magnetic bubble was returned to its initial setting using the electric power from the capacitor.

- Therefore, the capacitor becomes large in proportion to the storage capacity of the magnetic bubble storage device, and in a large-capacity storage device, not only does the mounting space for the capacitor become large, but there are also various problems in terms of maintenance. FIG. 1 shows a schematic configuration of a typical storage device using magnetic bubble elements, each of which has a plurality of minor loops Mij (1-1 to N, J-1 to n).
, a major loop Mi (1 = 1 to N), which is a common information transmission part, and a minor loop m...)
Transfer gate GiJ (1-1 to N, j-1 to n
) and a reading detector Di (1-1 to N) for detecting the presence or absence of a magnetic bubble on the major loop Mi.

This magnetic bubble storage device includes a plurality of minor loops Ml
The magnetic bubbles on the minor loop Mlj and the major loop Mi rotate in the direction of the arrow at the same timing, and when information is simply stored without being read/written from the outside, the magnetic bubble rotates on the minor loop Mlj. I'm just doing it.

When information is read/written, the minor loop Mil to the major loop Mi
Alternatively, a magnetic bubble is transferred from the major loop Mi to the minor loop Mlj.

A transfer gate Gij is provided to block or pass this transfer. The selection of these minor loops M1, the operation of the transfer gate GiJ, and the operation of the detector Di are performed by a control circuit (not shown) at prescribed timings, and necessary selection designations are performed. By the way, if a power failure occurs in the power supply circuit while performing such operation control, the timing and selection designation will be destroyed, and the operation will no longer be guaranteed when the power is turned on again.

Therefore, in the past, a power storage device was provided, and the electric power stored in the storage device was used to maintain and stop the rotational position of the magnetic bubble up to the initial setting position. In this way, the rotation of the magnetic bubbles will synchronize and start normal operation as soon as the power is turned on again. However, since the capacity of the capacitor increases in proportion to the storage capacity of the magnetic bubble storage device, a large-capacity magnetic bubble device requires large hardware.
The drawback was that securing mounting space and maintenance work were difficult.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the drawbacks of the prior art described above and to provide a system that can effectively set a magnetic bubble device to its initial state when the power is turned on.

In the present invention, address information is stored in some bubbles on any minor loop, for example, the rightmost minor loop Mi,n (1-1 to N) shown in FIG. When a state occurs and the power is then turned on again, a logic circuit reads out any information stored in the minor loop MiO and returns the information in the storage device to the state immediately after the power was turned off based on this information. It takes a composition.

However, according to this, in general, in magnetic bubble storage devices, the number of bubbles on a minor loop is not equal to a power of 2, so if address information is stored in these devices to logically configure hardware, a complicated logic circuit is required. Moreover, the operation of the software becomes complicated. Therefore, the present invention provides a magnetic bubble device in which the number of magnetic bubbles on the minor loop is not equal to a power of 2, for example, MIO-
Among MNOON minor loops, 2j-S-T-U
The rotational position (address information) of each minor loop is stored in 2J magnetic bubble groups consisting of J magnetic bubbles located at the same rotational position on the J minor loops satisfying the following equation.

Here, T is the number of magnetic bubbles on each minor loop, S is the number of magnetic bubbles used for the original data storage or the address information storage on each minor loop, and U is the number of magnetic bubbles used for either the data storage or address information storage. is the number of magnetic bubbles on each minor loop that is not used. In this state, after the power is turned on, it is determined whether or not the address information is stored in the j magnetic bubbles detected first, and if the address information is stored, the information is If the address information is not stored, the minor loop is rotated so that the magnetic bubble storing the address information is detected, and then the minor loop is rotated by reading out the minor loop storage information again. This is to initialize the position. Hereinafter, one embodiment of the present invention will be described in detail with reference to FIGS. 2 and 3.

FIGS. 2A and 2B show each major loop Mi (1-1 to N) and the rightmost minor loop MIO connected thereto. Further, address information is set in the magnetic bubble group on the minor loop MiO so that an address equal to a power of 2 can be specified. In addition, the initial setting position of the first bubble 1 of the magnetic bubble group is indicated by AO, and the minor loop R
Among the magnetic bubble groups above, the magnetic bubble group that is not used for storing address information is indicated by 'e.

For example, each minor loop Ml. The number of magnetic bubbles T above is 5
35, of which the number S of magnetic bubbles used for storing address information is 512 (29), and the number U of magnetic bubbles not used for storing information is 23, respectively, a minor loop MlO-M, respectively. For the 512 magnetic bubble groups made up of 9 magnetic bubbles located at the same rotational position above, addresses are assigned to the magnetic bubble positions from top bubble 1 to 512 so that addresses equal to 2 to the 9th power can be specified. Set the information. Then, the remaining 23 magnetic bubble groups 1e
Do not set address information for . Now, a power outage occurred while the magnetic bubble was rotating on the minor loop Mil.
If the position of the magnetic bubble to be read is set to Ar in order to perform the initial settings immediately after the power is turned on again,
The following two cases can be considered in which the magnetic bubble group becomes stationary on the minor loop MiO due to power cutoff.

That is, as shown in FIG. 2a, if the magnetic bubbles in the magnetic bubble group 1e do not come to rest at the position Ar at all, that is, the magnetic bubbles on the minor loop MiO that are read out immediately after the power is turned on again always indicate the above address information. and, as shown in FIG. 2b, the magnetic bubble read out immediately after the power is turned on again is included in the magnetic bubble group 1e and does not contain address information.

The operation of the present invention will be explained below with reference to the principle diagram in FIG. 2 and the block diagram in FIG. 3 for the above two cases.

As shown in FIG. 3, the initial setting circuit of the magnetic bubble storage device includes a detector 2 that reads out stored information from a magnetic bubble module 10, and a detector 2 that reads out stored information from a magnetic bubble module 10, and a detector 2 that decodes each bit number of the magnetic bubble on the minor loop based on the stored information. Decoding circuit 11. A control circuit 3, a register 4, a loop counter 6, a control circuit 5 for the loop counter 6, and a comparator 7 that compares the output of the loop counter 6 and the output of the register 8 and sends the comparison result to the drive control circuit 9. It is completed. In addition, register 8
After the address information read from the magnetic bubble module 10 is detected, the minor loop MiO shown in FIG.
This is to set the number of bits until the first bubble 1 of the upper bubble group is transferred to position AO at the same time as the power is turned on again. Further, the magnetic bubble module 10 stores address information using magnetic bubbles whose number is equal to the power of 2 of an arbitrary minor loop. First, let's talk about the case where the bubble on the minor loop Min always indicates address information immediately after the power is turned on again.
A loop in which a bit number assigned in advance to a magnetic bubble on iO corresponding to address information is stored in a register 4 by a control circuit 3, and further advances in synchronization with the magnetic bubble as it moves on a minor loop or a major loop. The above bit number is set in the counter 6 by the loop counter control circuit 5. On the other hand, the number of bits from when the address information is detected by the detector 2 until the first bubble 1 of the bubble group on the minor loop MiO is transferred to the position AO is set in the register 8 at the same time as the power is turned on again.

Therefore, after detecting the address information, the loop counter 6 starts incrementing at the same time as the bubble group is rotated on the minor loop from the detector 2. During the rotation, the comparator 7 is used to compare the contents of the loop counter 6 and the register 8, and at the same time when the count of the loop counter 6 and the contents of the register 8 match, the comparator 7 sends a signal to the drive control circuit. If the rotation of the magnetic bubble group on the minor loop is stopped, the magnetic bubble group is set to the initial setting value before the power is turned off.

The above operation will be further explained using specific numerical examples.

The total number of magnetic bubbles on the above minor loop MiO is 535.
, the number of bubbles used as address information is 512 (-2
9). Now, suppose that the number of the magnetic bubble read out immediately after the power is turned on again is number 100, and the register 8 is
If the set value of , that is, the number of bits necessary for an arbitrary bubble to be transferred and rotated to position AO after detection, is 200, then when the loop counter 6 starts counting from number 100 and reaches the 200th, Since this is the time when the leading bubble 1 on the minor loop MiO reaches the position AO, it is sufficient to stop the rotation of the magnetic bubble group. Next, a case will be described in which the magnetic bubble read out immediately after the power is turned on again does not include address information.

In this case, after detecting the bubble, the control circuit 3 sends a signal to the drive control circuit 9, and the bubble group is returned to the position immediately after the power was turned on again, and further rotated on the minor loop MiO. Here, any 1 on the minor loop MiO
If Q is the number of bits required for the bubble to go around once, then 1e
+1 + △Q < Q When the bubble is rotated by the number of △Q bits satisfying △Q It is possible to do this. Therefore, according to the above-described embodiment, the initial setting of the magnetic bubble storage device can be achieved with a quick start-up after the power is turned on again without losing the information before the power was turned off. As is clear from the embodiments described above, the present invention stores address information using magnetic bubbles whose number is equal to the power of 2 of an arbitrary minor loop, and reads out minor loop stored information as predetermined minor loop address information. The rotation position of the minor loop is initialized by determining whether or not the rotation position of the minor loop is indicated, and reading the information of the arbitrary minor loop position again based on the determination result.

Therefore, the present invention has the advantage that it can be achieved with hardware that requires a much smaller mounting space than the conventional method, and that it also simplifies software operation since it does not require complicated logic circuits.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a schematic configuration of a minor loop/major loop type magnetic bubble storage device, and FIGS. 2 and 3 are diagrams for explaining an embodiment of the present invention, and FIGS. is a state diagram on the minor loop for storing address information, and FIG. 3 is a block diagram for achieving the initial setting method according to the present invention. m...Minor loop, Mi...Mejial-1j, Gij...Transfer gate, Dj...Reading detector, AO...
...Initial setting position, Ar...Magnetic bubble position to be read, 1e...Magnetic bubble group not used for storing address information, 2...Reading detection circuit, 3... ...Control circuit, 4...Register,
5... Loop counter control circuit, 6...
・Loop counter, 7... Comparator, 8...
・Lujistar, 9... Drive control circuit, 10...
...Magnetic bubble module, 11...Decoding circuit.

Claims (1)

[Claims] 1. A plurality of minor loops having a number of magnetic bubbles not equal to a power of 2, a major loop or a major line common to these minor loops, and a connecting portion between the minor loop and the major loop or major line, which is provided to transfer magnetic bubbles. A magnetic bubble element having a transfer gate for controlling, a detector for reading the presence or absence of a magnetic bubble on the major loop or the major line, and a control circuit for selecting the minor loop and controlling the operation of the transfer gate and the detector. In this method, when the power is turned on, arbitrary minor loop storage information is read out and the rotational position of the magnetic bubbles is initially set. using 2
address information is stored so as to specify a rotational position on the minorloop equal to a power of It is determined whether address information is stored or not, and if the address information is not stored, the minor loop is rotated so that the magnetic bubble storing the address information is detected, and then any minor loop storage information is stored again. An initial setting method for a magnetic bubble storage device, characterized in that a minor loop rotational position is initialized by reading it out.