JPS59139192A - Magnetic bubble memory device - Google Patents

Abstract

PURPOSE:To attain data transfer with an external device whih have different transfer speed by providing a function conforming to the data transfer speed of the external device in a magnetic bubble memory device. CONSTITUTION:In case of reading, replication is executed after starting a rotary magnetic field and the data are read out from a bubble memory BM2. The data read out from the BM2 are temporarily stored in a buffer memory BF1 and controlled so that data are read out from a buffer memory BF2 in conforming with the data transfer speed of an external interface. Therefore, the read data read out from the BM2 is speed changed into the read data of the buffer memory BF1 with low reading speed as shown by an arrow. In case of writting, data are written in the BM2 after storing data more than one block in the data buffer memory BF1, and when the volume of data is reduced less than one block, the rotary magnetic field is temporarily stopped.

Description

[Detailed description of the invention] The present invention relates to a magnetic bubble memory device.

Conventionally, when a magnetic bubble memory device is connected to another device with a different data transfer speed, in order to absorb the difference in data transfer speed, another storage device 5 whose data transfer speed can be easily changed is used, such as a semiconductor random access device. Main storage device consisting of memory.

A method is used to transfer data through the LAN and adjust between different speeds.

However, using the main memory to adjust the data transfer rate increases the usage rate of the main memory and affects other processes.

Furthermore, it requires the development of special software.

In addition, especially in small-scale systems without main memory, a special data backup memo IJ l! is used to adjust the data transfer speed of the puzzle memory device and other devices. I needed a place.

There were drawbacks such as a decrease in system processing capacity or an increase in hardware.

The present invention eliminates the above drawbacks by providing a magnetic bubble memory device with a function to match the data transfer speed of other external devices, and provides a device that enables data transfer with external devices having different data transfer speeds. It is something.

According to the present invention, there is provided a data buffer memory for transmitting and receiving data between a magnetic bubble memory and an external device.

A magnetic bubble memory device is obtained, which includes means for temporarily stopping driving of the magnetic bubble memory based on the amount of data stored in the data buffer memory, and performs data transfer in accordance with the data transfer speed of an external device.

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention. Data signal DT from external device is sent to data buffer memory B
Writing to or reading from the bubble memory BM2 is performed via Fl'i.

The control signal CTL from the external device is sent to the access control circuit AC.
Applied to C3. The access control circuit ACC3 controls and monitors the base memory control circuit BFC4 that manages data storage in the data buffer memory IJBF1.
Bubble memo! j B M 2 k Instructs to drive the rotating magnetic field driver HRD5 and the read/write driver RWD6.

Generally, a magnetic bubble memory element, as shown in FIG.
and Minalube 11, which is a data storage section.

The data of the minor loop 11 is transferred to the block replicator 12.
The track 1 is transferred to the detector 13 via
4, and a write track 17 for storing bubbles generated by the bubble generator 15 into the minor loop 11 via the swap gate 16. Here, the block replicator 12 and the swap gate 16 are a typical example, and other gate systems may be used to apply the present invention.

The operation of the embodiment of the present invention shown in FIG. 1 will be described with reference to FIG.

First, an overview of access to the @bubble memory device will be explained. When a data read request from an external device is received, the bubble on the minor lube 11 is transferred to the booter read track 14 on the minor lube address corresponding to the address transmitted from the outside. When the data of the desired minor loop address reaches the block replicator 12, the block replicator 12 is operated.

The replicated bubble reads data from the detector 13 via the read track 14t.

The read data read from the bubble memory IJBM2 in FIG. 1 is input to the data buffer memory BFI.

The data buffer memory BFI is composed of a first-in, seven-earth-out (F'111i'O) type memory, and sequentially receives data strings from the bubble memory BM2. The input 7t IJ-code data is output in accordance with the externally requested data transfer rate.

Next, when a data write request is received, the rotating magnetic field is driven until the data is written to the corresponding minor loop address, and the write data that was previously input to the data buffer memory DPI from the external device is output. A bubble generator 15 generates bubbles according to the data, and after transferring the bubbles on the write track 17, the swap 16 is operated to write new data at a desired minor loop position.

The above explains the basic read and write operations.

When transferring a large amount of data, various methods are used to improve the efficiency of data transfer. For example, % patent application 1986-118
637 1 magnetic bubble memory address, p- address search mechanism converts physical minor addresses and logical minor addresses appropriately, and converts data strings in blocks (1
The aim is to improve overall data transfer efficiency by narrowing the gap between the data rows (which are transmitted by repeating data). However, when transmitting and receiving data at maximum data transfer efficiency, an overrun phenomenon occurs if the data transfer speed of the external device is low.

The present invention eliminates these drawbacks of the conventional device and utilizes the effective property of the vibable memory, which is the temporary suspension of transfer, to prevent the occurrence of data transfer overruns.

FIG. 3 is a waveform diagram at the maximum data transfer rate in a state where bubble transfer can be temporarily stopped.

FIG. 3(a) is a waveform diagram related to data reading.

After starting the rotating magnetic field ((1) in Figure 3(a)),
Perform the first overlap ([3) in Figure 3(a)) and read the data of the desired minor address on track 1.
4, and the data is read out by the detector 13 ((2) in FIG. 3(a)). Thereafter, when there are no more bubbles on the read track 6-14, the data of the 5th order minor address is transferred onto the read track 14 by the next transfer, and the data is read out at a detection step 613. Thereafter, the same process is repeated to read out continuous data.

FIG. 3(b) is a waveform diagram related to data writing. After starting one rotation of the magnetic field ((1) in FIG. 3(b)), the bubble generator 15 generates bubbles, and the write track 17
The bubble is transferred to the top, and when it reaches the swap gate 16', the swap is performed ((3) in FIG. 3(b)) and the data is written to the desired address ((2) in FIG. 3(b)).
). Similarly, continuous data writing is performed by generating a bubble at the next address, transferring data on the write track, and performing swap.

FIG. 4 is a waveform diagram of an embodiment of the present invention when bubble transfer is temporarily stopped to prevent data transfer overrun.

In the case of the lead shown in Fig. 4(a), after the rotating magnetic field starts ((1) in Fig. 4(a)) as in Fig. 3, replication is performed ((3) in Fig. 4(a)). ) 1 Read data from the bubble memory lJBM2 shown in FIG. 1 ((2) in FIG. 4(a)). Bubble memo! The data read from JBM2 is temporarily stored in data buffer memory BFJ, and the data is controlled to be read from buffer memory BF2 in accordance with the data transfer speed of the external interface. Therefore, the read data read from the bubble memory BM2 is (4) of the read data (fa in FIG. 4) of the buffer memory BFI (fa in FIG. 4), which has a slow read speed, as shown by the arrow in FIG.
)) In this example, the data buffer memo IJ B F 1
Assuming that the amount of data that can be input to is two blocks, in the case of a read, if there is one or more blocks of data in the data buffer memory BFl, the bubble memory l of the next minor address will be input.
Access control circuit A to stop reading from JBM2
The rotating magnetic field driver HRDS is controlled by CC3 to stop the rotating magnetic field, and when it becomes less than one block, the rotating magnetic field is restarted to read the next block.

In the case of the write shown in FIG. 4(b), after the data of one block or more is stored in the data buffer memory BFI, all the data is written to the bubble memory lJBM2, and when the data becomes less than one block, the rotating low-boundary After a temporary stop, one block or more of data is stored in the data buffer memory BFI upon reception of data from the outside, and at the next point the rotating magnetic field is restarted to write data into the bubble memory BM2.

In FIG. 1, the operation shown in the above time chart is performed at the buffer memory control circuit MBFC4.
The access control circuit ACC3' supervises the amount of data stored in 2, and if it is necessary to temporarily stop the rotating magnetic field.
i, the rotating magnetic field driver HRD5 is controlled to change its operation to the stop mode.

At this time, replication, swap, data detection strobe, bubble generator operations are stopped, and memory operation sequence control is also temporarily stopped tl:'i.

In this way, it is possible to construct a low-silver bubble memory interposed device that can easily transmit and receive data to and from some devices with different data transfer speeds.

As described above, the present invention can provide a magnetic bubble memo IJ fj device that can easily transmit and receive data with external interposers with different data transfer speeds. There is no need for a special data transfer rate conversion mechanism that includes a main memory externally, and there is an effect of reducing the amount of hardware in a small system, reducing the burden on the main memory in a large system, and reducing the burden on software development.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention. This is a medium-purple waveform diagram. 1... Data buffer memory BP, 2...
...Magnetic bubble memory BJ3...Access control circuit MACC54...Data buffer memory control circuit BFC. 5... Rotating magnetic field driver HRD, 5...
・Read ・10- Write driver RWD, DT・・・Data signal,
CTL...Control signal, 11...Minor loop, 12...Block replicator, 13
... Bubble detector, 14 ... Lead track, 15 ... Bubble generator, 16 ...
... Swapgate, 17. Old... Light truck. 11- Ju 1 Kuni 3

Claims (1)

[Claims] It includes a data buffer memory for transmitting and receiving data between the magnetic bubble memory and an external device, and a means for temporarily stopping driving of the magnetic bubble memory based on the amount of data stored in the data buffer memory, and a means for temporarily stopping the drive of the magnetic bubble memory based on the data storage amount of the data buffer memory, and controlling the data transfer rate of the external device. A magnetic bubble memory device characterized by simultaneous data transfer.