JPS5812670B2 - magnetic bubble memory device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a minor-loop measure-line type magnetometer that enables high-speed memory access by providing one or more bubble detectors and a plurality of bubble erase generators on the measure line. This invention relates to a bubble memory device.

Conventionally, magnetic bubble memory devices have generally used a minor-loop-major-loop type magnetic bubble chip as their storage element, but the recently appearing minor-loop-major-line type magnetic bubble chip can be used without changing the program applied to this device. If it is applied to a magnetic bubble memory device made of a bubble chip, there is a drawback that the hardware configuration becomes complicated.

Here, in order to clarify the present invention which will be described below, the concept of a conventional minor-loop-major-loop type magnetic bubble chip as shown in Japanese Patent Application Laid-Open No. 50-99233 will be briefly explained.

Figure 1 shows a simple conceptual diagram.

When a rotating magnetic field is applied to this chip, the bubble information on the minor loop 1 and the major loop 2 will rotate synchronously in the direction of the arrow. The bubble information of the position is transferred on the minor loop 1, is divided by the replicator 6 while being further transferred on the major loop 2 via the transfer gate 5, and is then divided by the bubble detector 3.
It is read out by .

In addition, in the case of writing, the bubble erasure generator 4 erases or generates a bubble, and this bubble information is transferred onto the measure loop 2 and transferred to the transfer gate 5.
The bubble information is further transferred to the minor loop 1 via the bubble information, so that the bubble information is written at the A point position.

The reading and writing of bubble information in the minor loop major loop magnetic bubble chip is as described above.
In a file memory device such as a magnetic drum memory device, the following method is adopted as a means for improving access time.

If there are multiple access requests within a certain period of time,
If bubbles with access requests exist randomly, the time it takes for all access requests to be completed requires multiple rotations of the minor loop and major loop.

However, if access requests are made in the order of reading and writing, all of these access requests can be processed within the rotation time of one rotation of the minor loop major loop, and the access requests are processed at high speed.

Therefore, focusing on this, a method has been adopted in which the time required for each access request is identified by an input/output control program, and the access time is effectively shortened by rearranging the access requests.

To explain this in detail with reference to FIG. 1, in the case of reading, the access time Atγ required for reading is Atγ=δ・m+ε・M+td (1
), and if we calculate the access time Atω required for writing in the same way, it becomes Atω = δ
・m+ε・M+tq (2)

However, td: Transfer gate T of minor loop 1
Transfer time from 0 to bubble detector 3, tq; Transfer time from transfer gate T0 of minor loop 1 to bubble elimination generator 4, m: Exists between the access-requested bubble on minor loop 1 and transfer gate T0. Number of bubble transfer patterns, M; major loop 2
Number of bubble transfer patterns existing between transfer gate Tα and transfer gate T0 of the minor loop having the bubble requested for access above, δ; Transfer time between each transfer pattern on minor loop 1, ε: On major loop 2 is the transfer time between each transfer pattern.

Access time A expressed by the above equations (1) and (2)
tγ and Atω are calculated by software means according to each access request within a certain period of time, and the access requests are rearranged.

After this sorting is completed, the access time can be effectively shortened by starting up and processing a plurality of access requests.

FIG. 2 shows a block diagram of a magnetic bubble memory device using such a minor-loop-major-loop type magnetic bubble chip. Control commands from an external device are decoded by the interface control circuit 7, and the control commands are decoded by the interface control circuit 7. The result read control circuit 8 and the write control circuit 9 are configured to perform predetermined control operations on the magnetic bubble chip group 10 of the minor-loop-major-loop type.

A brief explanation has been given above of the minor loop major loop type magnetic bubble chip, etc., but recently, a minor loop major line type magnetic bubble chip has been developed to replace the minor loop major loop type, and attempts are being made to put it into practical use.

FIG. 3 shows a conceptual diagram of the magnetic bubble chip, and the major difference from that of the minor loop major loop method is that the major loop 2 is replaced by a major line 11.

This major line 11 is called a "line" because it is a so-called open loop and is different from the minor loop 2, which is a closed loop.

However, when reading and writing bubble information, the function of this measure line 11 is used to transfer bubble information in the same way as the minor loop 2, but as shown in FIG. In the magnetic bubble memory device used, rewriting is not possible without the rewriting control circuit 13 as an external circuit.

Furthermore, if this new minor-loop major-loop type magnetic bubble chip is introduced into a conventional system without changing the software, the transfer time tq from the transfer gate T0 to the bubble elimination generator 4 shown in FIG. ,
It is necessary to equalize the time tq' required for the data to be transferred from the transfer gate 5 shown in FIGS. 3 and 4 to the bubble erase generator 4 via the rewrite control circuit 13.

In order to satisfy this requirement, the rewrite control circuit 13 has the drawback that a large amount of hardware is required, for example, assuming a 64 Kbit magnetic bubble chip, a shift register of about 1100 bits per chip is added.

An object of the present invention is to add simple hardware to the magnetic bubble chip and its surroundings when applying a minor-loop major-line magnetic bubble chip to a magnetic bubble memory device using a minor-loop-major-loop magnetic bubble chip. By doing so, the present invention aims to obtain a magnetic bubble memory device capable of high-speed memory access by directly applying the software used in the minor-loop-major-loop type magnetic bubble memory device.

To this end, the present invention provides one or more bubble detectors and a plurality of bubble cancellation generators on the major line of a magnetic bubble chip of the minor loop major line type, and also provides one or more By interposing a simple information transfer means (for example, a shift register) between the bubble detector and any plurality of bubble cancellation generators, the bubble information being transferred on the measurement line by the bubble generator can be transferred to the outside of the chip. The bubble information read out is rewritten on the minor loop by multiple bubble erase generators, and the information is rewritten on the major line, and the remaining bubble information is written outside the chip by the remaining bubble erase generators. This feature is characterized by a configuration in which information is written on the major line in the same manner as information from the main line is written on the minor loop.

The present invention will be explained below with reference to FIGS. 5 and 6.

First, FIG. 5 shows an example of the configuration of a minor lube major line type magnetic bubble chip according to the present invention.

As shown in the figure, one bubble detector 3 and two bubble elimination generators 4 and 14 are provided on the measuring line 11, but the number of these is not limited to this and may be plural. I have already mentioned that this is a good thing.

Figure 5 can be said to be the basic configuration of these.

In FIG. 5, of the two bubble elimination generators 4 and 14, the bubble elimination generator 4 is for erasing bubble information and writing new bubble information, and the remaining bubble elimination generator 14 is for erasing bubble information and writing new bubble information. This is for generating the bubble information read out to the outside of the chip by the bubble detector 3 on the major line 11 again and rewriting it on the original minor loop 1.

Therefore, it can be seen that some kind of bubble information transfer means is required between the bubble elimination generator 14 and the bubble detector 3.

The simplest bubble information transfer means is, for example, a shift register.

As shown in FIG. 6, this bubble information transfer means 16 is interposed as an external circuit between the bubble detector 3 of the magnetic bubble chip group 15 and the bubble elimination generator 14, thereby eliminating the conventional minor loop major loop method. The structure is such that the software used in the magnetic bubble memory device can be applied as is.

Here, the read and write operations will be specifically explained using FIG. 5.

First, to explain reading, the bubble information on a certain minor loop 1 that has been accessed is transferred onto the major line 11 via the transfer gate corresponding to that minor loop, and during this transfer, it is read out by the bubble detector 3. be done.

Here, it is necessary to return the read bubble information to the original minor loop 1, but this rewriting is performed by the bubble information transfer means 16 and the bubble erasure generator 14.

That is, the bubble information read by the bubble detector 3 is held in the bubble information transfer means 16 for a certain period of time, and then inputted to the bubble elimination generator 14.
New bubble information having the same content as the above bubble information is generated, and this bubble information is transferred on the major line 11 and then transferred on the original minor loop 1.

Next, writing will be explained. In this case, the bubble for which access is requested is transferred in 1,000 stages in the same way as in the case of reading.
The data is held for a certain period of time, passed through the bubble erasure generator 14 and the transfer path pattern, and then written with new information by the bubble erasure generator 4, and then transferred to the bubble position on a certain minor loop 1 for which access was requested. It is intended to do so.

Each access time Atγ required for reading and writing
', Atω' can be expressed as follows.

Atγ′=δ・m′+ε・M′+td′・・・・・・(
3) Atω′=δ・m′+ε・M′+tq′・・・・
・(4) However, td': Transfer time from the transfer gate 5 to the bubble detector 3, tq': Bubble erasure occurs from the transfer gate 5 via the bubble information transfer means 16, the bubble erasure generator 14, and the transfer path pattern. Transfer time required to reach device 4, m': Number of bubble transfer patterns existing between the bubble requested for access on the minor loop and the transfer gate corresponding to that minor loop, M': The number of bubble transfer patterns required for access on major line 11 This is the number of bubble transfer patterns that exist between the transfer gate of the minor loop having bubbles and the transfer gate 5.

δ and ε are the same as those in equations (1) and (2).

Here, the variables m, m', M, M in equations (1) to (4)
’ is m=m’ (5
)M=M′・・・・・・(
6) Assuming that formulas (5) and (6) are satisfied, td=t
d'...(7) Formula (7
), and tq=tq' (8
) The bubble elimination generator 4 is provided at a position that satisfies equation (8), and the bubble information transfer means 16 is provided that satisfies the time for one round.

By providing the bubble detector 3 and the bubble erasure generator 4 on the measure line 11 in this way, a magnetic bubble memory device using a magnetic bubble chip of the minor loop measure line method instead of the minor loop major loop method can be realized. This allows high-speed memory access while using conventional software.

In the above description of FIGS. 5 and 6, the case where one set of minor loop major lines is included in one magnetic bubble chip has been described.

However, it will be obvious that the present invention is not limited thereto and can be similarly applied to a magnetic bubble chip including a plurality of sets of minor loop measure lines.

In addition, although a shift register has been cited as an example of bubble information transfer means as an external circuit, another example is a delay line.

In short, anything that can hold information for a certain period of time can be used as a bubble information transfer means.

As described above in detail, the present invention provides a method for configuring a minor loop major loop type magnetic bubble memory device as a minor loop major line type magnetic bubble memory device. 1 on that measure line of the magnetic bubble chip
One or more bubble detectors and a plurality of bubble elimination generators are provided, and information is easily configured as an external circuit between any one or more bubble detectors and any plurality of bubble elimination generators. This is done by intervening means.

According to the present invention, by appropriately determining the arrangement of the bubble detector and the bubble elimination generator provided on the measure line, the software used in the conventional minor-loop measure-loop type magnetic bubble memory device can be improved. Not only can it be used as is, but it also has the advantage of enabling high-speed access processing.

[Brief explanation of the drawing]

Fig. 1 is a conceptual diagram of a magnetic bubble chip using a minor loop major loop method, Fig. 2 is a block diagram of a magnetic bubble memory device using a magnetic bubble chip using a minor loop major loop method, and Fig. 3 is a conceptual diagram of a magnetic bubble chip using a minor loop major loop method. FIG. 4 is a conceptual diagram of a magnetic bubble chip using a major line method. FIG. 4 is a block diagram of a magnetic bubble memory device using a magnetic bubble chip using a minor loop major line method. FIG. FIG. 6, a conceptual diagram of a magnetic bubble chip, is a block diagram in one embodiment of the present invention. 1... Minor loop, 3... Bubble detector, 4, 14... Bubble elimination generator, 5...
...Transfer gate, 7...Interface control circuit, 8...Readout control circuit, 9
...Write control circuit, 11...Measure line, 15...Magnetic bubble chip group of minor loop major line system, 16...Bubble information transfer means .

Claims (1)

[Claims] 1 Minor loop and major line system configured using a magnetic bubble chip consisting of an arbitrary number of minor loops in which bubble information is stored and a major line in which bubble information is read and written to the loops via a transfer gate. In the magnetic bubble memory device, an arbitrary number of bubble detectors and an arbitrary plurality of bubble erasure generators are provided on a measuring line configured with a magnetic bubble chip, and among the bubble detectors and the bubble erasure generators, By providing a bubble information transfer means that can hold information for a certain period of time for rewriting between arbitrary plurality of
The bubble information read out by the bubble detector is generated again on the measure line via the bubble information transfer means and any plurality of bubble elimination generators, and external information is generated by the remaining arbitrary plurality of bubble elimination generators. A magnetic bubble memory device characterized in that it is configured to generate bubble information on a major line.