JPH04358220A - Electronic disk device - Google Patents

Abstract

PURPOSE:To provide an electronic disk device which does not occupy a device for a long time in the case of writing the same data. CONSTITUTION:A semiconductor memory part is divided into plural memory blocks 14, 15, 16 and 17, a value to be written in address area instruction registers 2, 3, 4 and 5 provided corresponding to these memory block is compared with the high-order two bits 19 of a memory part access address by address comparing means 6, 7, 8 and 9 and while comparing memory block write signals 26, 27, 28 and 29 outputted by writing means 10, 11, 12 and 13 of a system detecting the coincidence, the data are written in the memory blocks 14, 15, 16 and 17. At this time, when the same value is written in any one of the address area instruction registers 2, 3, 4 and 5, the same data can be stored in the plural memory blocks 14, 15, 16 and 17 by single write operation.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to electronic disk drives, and more particularly to write control for semiconductor storage units.

0002

2. Description of the Related Art Conventionally, in this type of electronic disk device having a storage unit divided into a plurality of storage blocks, a fixed address area instruction value is determined for each storage block, and each storage block Each was in charge of a fixed address area.

0003

[Problems to be Solved by the Invention] In the above-mentioned conventional electronic disk device having a storage section divided into a plurality of storage blocks, each storage block is responsible for a fixed part of the total address area. Therefore, even if it is desired to write the same data to each storage block, the data must be written to each storage block, which poses the problem of monopolizing the electronic disk device for a long time.

An object of the present invention is to provide an electronic disk device that does not occupy the device for a long time when writing the same data.

[0005]

Means for Solving the Problems An electronic disk device of the present invention includes a processor and a semiconductor storage section that can be written to and read from the processor, in which the semiconductor storage section is divided into a plurality of storage blocks. an address area instruction register provided corresponding to a memory block and into which an address value can be written from the processor; and a value of the address area instruction register and the semiconductor memory when a write operation is performed to the semiconductor storage section by the processor and a DMA operation. an address comparison means for comparing the value of an upper address for selecting a memory block corresponding to an access address to the section; and an address comparison means for comparing the value of an upper address for selecting a memory block corresponding to an access address to the section; This configuration includes a memory block data writing means having a writing function.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention. 1 is the processor, 2 is the address area instruction register A
, 3 is address area instruction register B, 4 is address area instruction register C, 5 is address area instruction register D, 6
, 7, 8, and 9 are address comparison means (hereinafter referred to as comparison means); 10, 11, 12, and 13 are memory block data writing means; 14 is memory block A; 15 is memory block B;
16 is a storage block C, 17 is a storage block D, 18 is a processor data bus, 19, 20 is a storage access address, 21 is a storage write signal, 22, 23, 24,
25 is an address area match signal, 26, 27, 28, 29
is the storage block write signal.

In this embodiment, the 256K word storage section is divided into four 64K word storage blocks (14, 15, 16,
17) describes the case of division. In this case, each address area instruction register is composed of a 2-bit register.

Next, the operation will be explained.

First, the storage unit is set to address “00000 (H)”.
~3FFFF(H)”, set address area registers A and 2 to “00(B)”, address area register 3 to “01(B)”, and address area register C.
, 4, and "11 (B)" to the address area register D, 5. With this setting, the value of storage access address 19 and 20 is “00001”.
(H)” and the memory write signal is set to “1”,
The address comparison means 6, 7, 8, and 9 compare the value AD(02)=00(B) of the storage section access address 19 with the values of the address area designation registers 2, 3, 4, and 5. As a result, when only the comparison means 6 detects a match and sets the address match signal 22, the memory block data writing means 10 that has received this address match signal sets the memory block write signal 26, and the memory block A14, Write data to address “0001(H)”. When used in this state, the function is exactly the same as that of the conventional device, so when the processor 1 writes the same data to all address areas, 256K accesses are required. However, in the present invention, address area registers A, B, C, D, 2, 3
, 4, and 5, and then write the same data to the address area from address "00000(H) to 0FFFF(H)", memory blocks A, B, C, Since data can be written to all of D, 14, 15, 16, and 17, data can be written to all of the storage units with 64K accesses.

[0011]

As explained above, the present invention provides an electronic disk device having a storage section divided into a plurality of storage blocks, by specifying the address area that each storage block is responsible for, by specifying the address area corresponding to each storage block. Since we have made it possible for the processor to decide by writing a specified value to the register, all memory blocks can be set to the same address area, and if data is written to these address areas in this state, it will be written to all memory blocks. Data can be written to both at the same time. Also, if you want to exchange data in one address area with data in another address area, you can do so by simply rewriting the address area instruction register of the memory block corresponding to the address area. In this case, there is an effect that it is possible to avoid monopolizing the electronic disk device for a long time.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention.

[Explanation of symbols]

1 Processor 2 Address area instruction register A3 Address area instruction register B4 Address area instruction register C5 Address area instruction register D6, 7
, 8, 9 address comparison means 10, 11, 12,
13 Memory block data writing means 14 Memory block A 15 Memory block B 16 Memory block C 17 Memory block D 18 Data bus 19 Upper 2 bits of memory access address, A
D (0:2) 20 Storage access address, AD (2:16)
)21 Memory write signal

Claims (1)

[Claims] 1. An electronic disk device comprising a processor and a semiconductor memory section that can be written to and read from the processor, wherein the semiconductor memory section is divided into a plurality of memory blocks, and an address value that is provided corresponding to the memory block and that receives an address value from the processor is provided. an address area instruction register in which writing is possible, and a memory block corresponding to the value of the address area instruction register and the access address to the semiconductor storage section when writing to the semiconductor storage section by the processor and DMA operation is selected. an address comparison means for comparing the value of the upper address for the purpose of the address comparison, and a memory block data writing means having a function of writing data only to the memory block corresponding to the address area instruction register for which a match is detected by the address comparison means. An electronic disk device comprising: