JPH0554200B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a magnetic bubble memory device suitable for detecting whether or not a magnetic bubble memory device is mounted.

[Background of the invention]

Conventionally, in a magnetic bubble memory device comprising at least a magnetic bubble memory device composed of a magnetic bubble memory element, a rotating magnetic field generating coil, and a bias magnetic field generating permanent magnet,
In order to display the number of installed magnetic bubble memory devices, a method has been used in which a switch is provided and the state of the switch indicates the number of installed magnetic bubble memory devices. The signal determined by this switch is connected to a host computer that connects the magnetic bubble memory device, and the host computer reads the state of this switch and determines the number of installed units, that is, the capacity of the magnetic bubble memory device, before operation. He was aware of this and was operating within his capacity. This method has the following drawbacks. That is, first, since a switch is used, the number of parts increases. Second, since the state of this switch can be read by the host computer, the number of signal lines between the magnetic bubble memory device and the host computer is increased. Thirdly, if you arbitrarily increase the number of magnetic bubble memory devices, you will need to reset the switch each time.
It takes a lot of time to expand.

[Purpose of the invention]

Therefore, an object of the present invention is to provide a magnetic bubble memory device that can detect the number of installed magnetic bubble memory devices by utilizing the characteristics of the magnetic bubble memory element without adding any parts such as a switch. There is.

[Summary of the Invention] To achieve such an object, the present invention provides a magnetic bubble memory device including a magnetic bubble memory element having a pine loop for storing address information and a defective loop, in which data from the pine loop is all “0”. ”, it is assumed that the magnetic bubble memory device is not mounted. That is, the magnetic bubble memory element is
A major minor system is used, which consists of a plurality of minor loops for storing data and a major loop for reading and writing data. The minor loop is provided with a spare loop, and if this minor loop is defective and cannot be used, a system is used in which the minor loop is switched to and used. For this purpose, it is necessary to memorize the defective loop, and it is also necessary to synchronize the address of the minor loop with the magnetic bubble memory control circuit.
Pine plumes are provided for this purpose. As described above, this map loop stores an index signal for recognizing addresses and defective loop information. When data is written to or read from the magnetic bubble memory element, prior to this operation, the data in the map loop of the magnetic bubble memory element, that is, the address, is recognized and the defective loop is read. A signal for address recognition always consists of a combination of "1" and "0". On the other hand, if the magnetic valve memory device is not mounted, all data in the map loop is read as "0". Therefore, when reading Matsuploop data, it is possible to know whether a magnetic bubble memory device is mounted.

[Embodiments of the invention]

Next, embodiments of the present invention will be described in detail using the drawings.

FIG. 1 shows the structure of a major-minor type magnetic bubble memory element related to a magnetic bubble memory device according to the present invention. In the same figure,
1 is a minor loop that stores data; 2 is a map loop that stores index information for address detection and defective loop data indicating whether minor loop 1 is a defective loop; 3 is a write line;
4 is a read line, 5 is a generator, 6 is a detector, 7 is a swap gate of the minor loop 1, and 8 is a replicator of the minor loop 1.
On the other hand, the gate for Pine Proop 2 is Minor Loop 1.
9 is a swap gate of map loop 2, and 10 is a replicator of map loop 2.

Furthermore, FIG. 2 is a block diagram of essential parts showing an example of a magnetic bubble memory device according to the present invention. In the figure, when transferring data to a magnetic bubble memory element, a host computer 11 instructs a magnetic bubble memory controller (BMC) 12 to operate the magnetic bubble memory. This magnetic bubble memory controller 12 is connected to the host computer 11.
The sequence of the magnetic bubble memory device (MBM) 13 is controlled by instructions from the MBM 13, and a register is provided therein for storing map loop data output from the sense up circuit, which will be described later. Here, this magnetic bubble memory device 13 is composed of a magnetic bubble memory element shown in FIG. 1, a rotating magnetic field generating coil, and a bias magnetic field generating permanent magnet. 14 is a function timing generator (FTG) that generates various timings necessary for the operation of the magnetic bubble memory device 13; 15 is a coil that flows a rotating magnetic field generating current to the rotating magnetic field generating coil of the magnetic bubble memory device 13; driver (CD); 16 is a function driver (FD) that generates a pulse current such as a generator pulse necessary for operation of the magnetic bubble memory device 13; 17 is a sense amplifier (SA)
When reading magnetic bubble memory data, this sense amplifier 17 amplifies the output from the magnetic bubble memory device 13, determines whether it is "1" or "0", and sends the output to the magnetic bubble memory device 1.
3 is output to the magnetic bubble memory controller 12 as read data.

When the magnetic bubble memory device configured in this way is turned on, it first recognizes the address of the magnetic bubble memory device 13 and transfers the defective loop data stored in the maple loop 2 to the address of the magnetic bubble memory device 13. An operation is performed to write to the defective loop storage circuit. This control is of course carried out by the magnetic bubble memory controller 12.

FIG. 3 shows an example of data of Pine Proop 2. As described above, the map loop stores index data _DI for address detection and defective loop data _DN . In the example shown in FIG. 3, the index pattern is a predetermined number or more consecutive "0" followed by "10101010", and when this "10101010" pattern is detected, the data in the magnetic bubble memory controller 12 is It synchronizes with the counter and recognizes the address of the magnetic bubble memory. On the other hand, the defective loop data is stored following the index pattern in such a way that one bit corresponds to one loop of the minor loop 1. If this defective loop data is “1”,
It means a good loop, and "0" means a defective loop. Naturally, there is as much defective loop data as there are minor loops. As shown in FIG. 3, the index pattern always includes "1", and if "1" does not exist, it is impossible to synchronize the addresses.

In the configuration of FIG. 2, if we consider the case where the magnetic bubble memory device 13 is not mounted, no signal is input to the input of the sense up 17, so there is no output from the magnetic bubble memory device 13, that is, input data This is the same as when is "0". Therefore, Pine Proup 2
If the map data is all "0" when reading data, it can be considered that there is no magnetic bubble memory.

FIG. 4 shows the processing flow when reading the maple loop data. In the figure, the number of bits in the map loop is actually a limited number, and the time to read out everything in the map loop is determined by the number of bits in the map loop. Therefore, reading of the map loop is started in step 31, one bit of the map loop data is read out in step 32, and if no index pattern is detected in step 33, the process is started in step 34 if it is outside the predetermined time. 32, Step 3
Repeat step 3. If the index pattern is not detected and there is even one "1" in the map loop data read in step 35, it means that the index pattern has been destroyed and the magnetic bubble memory device has not been mounted. (Step 36). On the other hand, if the map loop data is all "0" in step 35, the magnetic bubble memory device is not mounted (step 37). Further, if an index pattern is detected in step 33, defective loop data is read in step 38, so a magnetic bubble memory device is mounted. In this way, it is possible to detect whether or not a magnetic bubble memory device is mounted when reading Matsuploop data.

By using such a method, the number of installed magnetic bubble memory devices can be detected.

FIG. 5 is a block diagram of main parts showing another embodiment of the magnetic bubble memory device according to the present invention, and since the same symbols as in the previous figure represent the same elements, a description thereof will be omitted. In the same figure, 13a and 13b are #0,
#1 magnetic bubble memory device is shown, and this #0, #1 magnetic bubble memory device 13a, 1
Two magnetic bubble memory devices 3b are mounted, and the other #2 magnetic bubble memory device 13a is not actually mounted. In such a connection, the operation of sequentially reading map loop data from the #0 magnetic bubble memory device 13a continues. Of course, this control is performed by the magnetic bubble memory controller 12. First, #0 magnetic bubble memory device 13a
is implemented, so the index pattern is detected correctly. Subsequently, when the map loop data of #1 magnetic bubble memory device 13b is read, the index pattern is normally detected and it can be known that the magnetic bubble memory device 13b is mounted. Continuing to read the Matsuproop data of the #2 magnetic bubble memory device. However, #2 magnetic bubble memory device 13
c is not implemented, so all data is “0”
Therefore, the magnetic bubble memory controller 12 can know that the #2 magnetic bubble memory device 13c is not mounted. Therefore,
The magnetic bubble memory controller 12 can know that the number of installed magnetic bubble memory devices is two, #0 and #1 magnetic bubble memory devices 13a and 13b, and stores this value in a register in the magnetic bubble memory controller 12. can be stored in By making the contents of this register accessible from the host computer 11 (see FIG. 2), the host computer 11 can also know the number of installed magnetic bubble memory devices.

According to such a configuration, the magnetic bubble memory controller 12 detects the number of installed magnetic bubble memory devices based on the data from the magnetic bubble memory devices 13a and 13b, so it is extremely easy to deal with expansion etc. .

〔Effect of the invention〕

As explained above, according to the present invention, by reading the pine probe data of the magnetic bubble memory device, it is possible to know whether or not a magnetic bubble memory device is mounted, and therefore the number of mounted magnetic bubble memory devices. There is no need to provide a switch to display the number of installed devices, making it possible to provide magnetic bubble memory devices at low cost. Excellent effects can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of main parts of a magnetic bubble memory element related to a magnetic bubble memory device according to the present invention, and FIG.
FIG. 3 is an explanatory diagram of map loop data, FIG. 4 is a flow diagram showing processing of map loop data, and FIG. FIG. 2 is a block diagram showing main parts of another embodiment of the magnetic bubble memory device according to the present invention. 1...minal loop, 2...pine proop, 3
...Write line, 4...Read line, 5
... Generator, 6... Detector, 7... Swap gate for minor loop, 8... Replicator for minor loop, 9... Swap gate for map loop, 10... Replicator for map loop, 11... Host computer (CPU), 12
...Magnetic bubble memory controller (BMC), 1
3, 13a, 13b...Magnetic bubble memory device (MBM), 14...Function timing generator (FTG), 15...Coil driver (CD), 16...Function driver (FD), 17... ...Sense amplifier (SA).

Claims (1)

[Claims] 1. A magnetic bubble memory device comprising at least a magnetic bubble memory device having a map loop for storing address information and defective loops, and a magnetic bubble memory controller for controlling the magnetic bubble memory device, wherein the magnetic bubble memory controller has a map loop. 1. A magnetic bubble memory device comprising means for determining whether all data in the data are "0" and a register for storing the result of this determination.