JPS6396794A - Magnetic bubble memory device - Google Patents

Abstract

PURPOSE:To facilitate the checking of the state of a memory device by providing a control system with a means which writes fixed data in a bubble memory device, reads it and compares it with original data. CONSTITUTION:A host processor 1 instructs a write means 21 in the control system 21 to write data from a fixed data generation source 12 in the bubble memory device 3. When the writing starts in time T4 to begin a write action, bubbles in the memory device 3 move, and soon read-out data is obtained by a reading-out means 22. This time lag is extremely small due to the constitution of the bubble memory. Then a comparing means 23 compares the read-out data with an output from the fixed data generation source 12. When the write action ends in time T5, read and comparison actions are also completed, thereby shortening time from processing start to its end.

Description

[Detailed Description of the Invention] [Summary] A magnetic bubble memory device in which the control system is equipped with a means for writing fixed data into a bubble memory device, reading it, and comparing it with the original data, thereby making it easy to check the status of the memory device. be.

[Industrial Application Field] The present invention relates to a magnetic bubble memory device that checks the state of a memory by reading and comparing data written in an initial state.

In conventional devices, the host processor has to monitor and control all write, read, and data comparison operations performed by the host processor from the start of the process until the end of the process. It has been desired to reduce the load on the host processor in this case.

[Prior Art] In a magnetic bubble memory device, when a product device is shipped or when a user initializes the device, fixed data such as all “θ” are written. The data read from the memory device is then compared with the original data to check that it has been written correctly. In this case, the conventional apparatus had the configuration shown in FIG. 4 and operated according to the operation time chart shown in FIG. 5. In FIG. 4, the host processor l sends a control signal to the control system 2 of the bubble memory device, and the writing means 2 in the control system 2
1 was writing to memory device 3. At this time, a fixed data generation source 12 is provided in the host processor 1. Next, the data read from the memory device 3 by the reading means 22 of the control system 2 is compared with the original data by the comparing means 11. As shown in FIG. 5, after starting the process, the host processor 1 first instructs a write operation at TI, and then causes a read operation to be performed from time T2. A comparison operation is performed simultaneously on successive data. At time T3, the successive addition/comparison operation ends.

[Problems to be Solved by the Invention] In the above-mentioned processing, in the conventional device, the host processor 1 has to monitor the operation of the bubble memory for the entire time from writing of fixed data to completion of checking, which imposes a heavy load. Ta.

SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic bubble memory device that can improve the above-mentioned drawbacks, reduce the load on a host processor, and efficiently write and check fixed data.

[Means for Solving the Problems] FIG. 1 is a diagram showing the basic configuration of the present invention. In FIG. 1, 1 is a host processor, 12 is a fixed data generation source, 2 is a magnetic bubble memory device control system, 12 is a data writing means, 22 is a data reading means, 23 is a data comparing means, and 3 is a bubble memory device. show.

The present invention has the following configuration in a magnetic bubble memory device that writes fixed data such as all "0" in the bubble memory device 3, reads it out, and compares it with the original data to check the memory state of the memory device 3. That is, in the magnetic bubble memory control system 2 provided between the host processor 1 and the bubble memory device 3, a means 21 for writing the output of the fixed data generation source 12 into the bubble memory device 3, a reading means 22, and a reading means are provided. 22 with the output of the original data source 12.

[Operation] The host processor 1 instructs the writing means 21 of the control system 2 to write the data of the fixed data generation source 12 to the memory device 3. FIG. 2 shows an operation time chart of FIG. 1. As shown in FIG. 2, the process starts at time T4, and a write operation begins. There is a bubble movement in the memory device 3 and soon the read data is obtained by the reading means 22. This time difference depends on the configuration of the bubble memory, but is extremely short. Next, the comparison means 23 compares the successive data with the output of the fixed data generation source 12. Therefore, when the write operation ends at time T5, the successive writing/comparison operation also ends almost at the same time. Therefore, the time from the start to the end of processing is shorter than before.

[Embodiment] FIG. 3 shows an embodiment of the present invention in which a major line/minor loop type bubble memory device is used and a 1-byte register as a fixed data generation source. In FIG. 3, the same reference numerals as in FIG. 1 indicate the same components. Fixed data such as all “0” is written in the register 13. host processor 1
is the writing means 21. Reading means 22. Processing can be started by giving a command to the comparing means 23 only once.

The data in the register 12 is read by the writing means 21 and the data is applied from the generator 31 of the bubble memory device 3 to the write measure line 32. One byte worth of data arranged on the mezzanine 32 is written at once to the minor loops 34-1, 34-2, . . . by the swap gate 33. When the bubble is transferred within each minor lube and approaches the replicator gate 35, this gate 35
One byte of data at a time is read out to the major line 36 via the main line 36. The data on the reading mezzer line 36 is transferred by the reading means 22, and the data is transferred to the comparing means 2.
3 and compared.

After the host processor 1 has given the above operating program, it can leave it to the control system 2 to perform other processing operations. It is determined by the interrupt notification signal from the control system 2 that the successive comparison operation has been completed.

[Effects of the Invention] As described above, according to the present invention, writing and reading of fixed data to and from the bubble memory can be performed almost simultaneously in parallel, so that the memory state check of the bubble memory device can be completed in an extremely short time. has.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the principle configuration of the present invention, FIG. 2 is an operation time chart of FIG. 1, FIG. 3 is a diagram showing the configuration of an embodiment of the present invention, and FIG. 4 is a conventional magnetic bubble memory device. FIG. 5 is an operation time chart of FIG. 4. 1--Host processor 2--Control system of magnetic bubble memory device 3--Bubble memory device 12--Fixed data generation source 21-Writing means 22--Reading means 23-Comparing means Fig. 1 1 Masterpiece time chart Figure 2, Figure 3I! I Figure 4 1 Kaji T tie b chart Figure 5

Claims (1)

[Claims] In a magnetic bubble memory device that writes fixed data such as all "0" in a bubble memory device (3), reads it out and compares it with original data to check the memory state of the memory device (3). , a host processor (1) and a bubble memory device (3).
) in the magnetic bubble memory control system (2) installed between the
means (21) for writing the output of the fixed data source (12) into the bubble memory device (3) and means (22) for reading it;
The output of the reading means (22) is sent to the original data source (1).
A magnetic bubble memory device characterized in that it comprises means (23) for comparing the output of step 2).