JPS58180000A - Computer system - Google Patents

Abstract

PURPOSE:To hold assuredly the contents of storage of an external conductor storage device with an auxiliary power supply of small capacity, by providing a power supply state detecting circuit to an external storage controller and setting the capacity of the auxiliary power supply at a level for transfer of data when the power supply is cut off. CONSTITUTION:A nonvolatile external storage device 8 is connected to a semiconductor external storage device 5 via an external storage controller 7. At the same time, a power supply detecting circuit 20 is provided to the controller 7 to detect the make/break state of the system power supply. The controller 7 transfers a data on the storage contents of the device 5 to the device 8 on the basis of a power supply detecting signal which is delivered when the power supply is cut off. The capacity of the auxiliary power supply is set at least at a level for transfer of data when the power supply is cut off.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an electronic meter II! ! Regarding various systems using electronic computers, it is related to computer systems that are capable of automatically retaining the stored contents of external memory in the event that the power supply is cut off. TECHNICAL BACKGROUND OF THE INVENTION Conventionally, as an external storage device FIK in a computer system, a rotating storage device such as a magnetic disk or a magnetic drum has been used. On the other hand, today, with the increase in the amount of information and the fact that administrative processing has become a formality, the processing ability of electronic meter systems has increased.
Improvement of PK processing efficiency is required, however,
The above-mentioned oral story 4! - access time is generally several t
ormt4] It's a culvert, so it's definitely not a high-speed one.

So recently, #! Accompanied by Sakaki-like access behavior! (eI) with no access time, so-called semiconductor external storage devices using one semiconductor memory have come to be adopted as non-standard S1 information W. Here, conventional electronic computing systems A general analysis of 1 [formation is shown in 1Δ. Hayabusa 1 In the darkness, Central Office fMIII (hereinafter referred to as cpU)
The main storage unit +11'l is connected to tr via Vanu2. In addition, the external 1 external storage device F3 is connected via the path 2KFi external storage device 1vIl-device 1F4, and the semiconductor external storage device F5 is connected to the external storage device F3 based on the CPU command. Main memory! It is a problem to control data transfer between F3s. [Highlights of background technology] Although the above-mentioned TK# conductor has four external memory arms, high-speed access, and large capacity, etc. Due to the principle of one-sidedness, it has the disadvantage that when the power supply is controlled, the memory becomes volatile. In order to compensate for this drawback, conventionally, an auxiliary power supply such as a battery is provided in advance so that the system automatically switches to battery power at the same time as a power outage occurs. However, there is a gap in the battery power source's W and A supply capacity.
If the storage device has a large capacity or if the power outage lasts for a long time, the KFi storage contents may be lost.

[Purpose of the invention]

Therefore, the present invention is configured so that the contents stored in the semiconductor external storage device can be reliably retained with a small capacity auxiliary power supply.
[Summary of the Invention] In order to achieve the above object, an electronic counter system according to the present invention provides an external memory control system for a semiconductor external memory device.
A non-volatile external storage device connected through the I system is provided, and a power output circuit for detecting the state of the W source (on or quick disconnection) of the external storage device system is provided; The power supply detection signal KJ that is output at 0 and 1 (" when W pumping is cut off)
The storage contents of the storage device are transferred to the non-volatile external storage device iK, and the capacity of the auxiliary power supply is at least W. It is characterized by the fact that it is a book necessary for the production of the invention.
'r, 1ll15 Machi, <Overall system configuration, ＼ Figure 2 shows an overview of the overall configuration of the city 1 child calculation according to the present invention. In Figure 2, parts that overlap with those in Figure 1 are given the same reference numerals and L7 and f' are omitted.
A non-volatile external information device 8 is connected to the device #7.

With this connection, the non-volatile external analyzer “Insou □8” and the semiconductor P
There is a connection relationship 1 through memory F5 and external P yearning system buttock hearing 7, and external memory system Pi11! Data transfer is now possible in both directions due to the first and second functions of spindle 7 (L, -+R). An auxiliary power supply IW9 is connected to supply power when the system power supply is disconnected.

Each component, element A specific example of the external S storage control device Ii7 is shown in Figure 3.

In the 3-dimensional diagram, IO indicates a data transfer controller that performs the central function of data transfer control.

The controller 10 is fL connected to the O'PtT 1, the semiconductor external storage device 5, and the nonvolatile external storage device 8 via the pass line 11 and adapters 12, 13, and 14, respectively. In addition, the controller 10 includes a data buffer memory 15 for temporarily storing data transferred between the semiconductor external storage 1!115 and the nonvolatile external storage device 8, and is connected via a path line 11.

16.1), 18, and 19 show control lines for transmitting control signals for controlling each important operation.

controller 1 (ltj system 1 source (general tut,
AC commercial electricity condition! This power supply detection circuit is equipped with a power supply detection circuit that detects (on or off)! i5' circuit is added, the WL source from CPU 1 inputted via adapter 12 is searched for the interrupt signal, and if the content is based on the power supply disconnection f, it is exported by Nobuhide. Occur. From this signal, the controller IO must have a memory capacity of 1 memory external to the semiconductor as the non-volatile external memory WjI8 that starts via the data transfer operation described later. Considering the use of books, books with short access times are better.Specifically, storage devices using magnetic disks and magnetic tapes can be used.Auxiliary W#9
At least during a power outage, the external storage control device 7, the semiconductor external storage W5, and the non-volatile external storage control device #
It is necessary to have the ability to drive the non-semiconductor mt'ff board 5 and continue operation until the data transfer from the non-volatile external data transfer device 8 is completed. It is said that Specifically, Batch 1-1 in-house production! I am sorry for the inconvenience. <Operation> Next, I will explain the operation. Heavy, normal time (Shizuzawa City time)
, the electronic computing system is performing the work given to it, and if we focus on the transfer operation of the stored data,
As mentioned above, the external storage control device WI7 performs transfer control based on the command of 0PUI.

Next, controller 1 will be described below with reference to a flowchart showing the 48th iQK operation in the case where power is not supplied to the system for some reason.
0 is constantly searching for the presence or absence of an interrupt from 0PUI (Fig. 4, step 100). Now, an interrupt is input via the adapter 12 and the value is +4, and the content of the interrupt signal is determined by the power supply detection circuit. (Step 200). If the result of the judgment is that the power is turned off (step 200. Y
]ff18'), the controller 10 controls ll11s
A read command is given to the adapter 13 through the adapter 18, and the data stored in the semiconductor external storage device 15 is sequentially read out and stored in the -1 data buffer memory LSK (step 400). Next, the controller 10 gives a write command to the adapter 14 through the control line 19, and transfers the stored data to the data buffer memory 15K, output L7, and stores it in the data buffer memory 15K. Step 5
00), σ) The number of rotations of the cabinet Yke count Sanedori (
Stella 1゜600), mn that is not 4 in the total data rotation number (y,, n) is passed through step 700 to 10F step 4
00 and 500 are collided in step 7. It is a counter of 700 kinds, and it generates a decrement river/Zrus for every transfer (b)a]i. Note that this Y is a counter of step 700.
Set to 00.

In this manner, when all data transfer is completed, the counter (step 600) becomes yFiy-0, and the transfer operation is completed (step 800). All stored data in #5 is invalid! Have a good time! is stored in the transfer path K (in the storage fold j8), so it will not disappear and will be reliably retained. (Modification) The above explanation describes the case when the W source is disconnected, but in the present invention, once the W source is It is best to configure the K storage data to be returned to the semiconductor external storage device 5 side when it is disconnected and then recovered (that is, input IB).

In that case, a program can be installed in the controller 10 that enables the power supply detection circuit I to detect an interrupt when turned on, and that performs the reverse operation of the above embodiment accordingly. Just do it.

〔Effect of the invention〕

As described above, according to the present invention, a non-volatile external storage tube capable of storing data stored in a semiconductor external storage memory is connected via an external storage control device, and #11j is connected to the external storage control device.
Y! By providing a circuit that detects the state of deafness, it is possible to at least have the ability to control the transfer of 100 million liters of data stored outside the semiconductor to a non-volatile external storage device in the event of a mixed fuse.・4 of the few and the bell and the straw! ! - drive the monument WI;
By providing an auxiliary power source that can supply power until the end of the data transfer, the following effects are achieved.

■ Saving stored data in the event of a power failure can be done independently by the host system's CPA control system or external system! stone. This #':t Tanutem design, production upper-level device IFIIllKwg1. Jo on the 11th floor realized that he didn't have to think about saving data because he was extremely busy. Therefore, the production of the system configuration becomes a problem, and miniaturization is also possible.

(2) It may be driven by an external device, and therefore the amount of auxiliary power supply may be small. This means that the subsidiary city, g
! This not only contributes to the miniaturization of the system, but also contributes to the compact size of the system, making the low range of the original → natural range more flexible.

Thus, according to the present invention, it is possible to provide a system that can reliably hold data stored in a semiconductor external storage device using a small-sized auxiliary W source.

[Brief explanation of the drawing]

Figure 1 is an RT* block diagram of a conventional general electronic learning system, Figure 2 is an overview block diagram of an electronic candlestick system invented by the palm of the hand, and Figure 3 is a block diagram of an external memory system according to the present invention. The fourth example is a flowchart showing the operation of the external F admiration system in the block darkness and clear light. 1...CPU, 3...Shiki's dream adventure, 5...Semiconductor memory @! 1. 7... External storage system (capital) device, 8...
Non-volatile external storage device, 9... Auxiliary power supply, 15...
data nokura memory,

Claims (1)

[Scope of Claims] l A central processing unit that performs overall control of the system, a main memory device connected to the central processing unit, and a semiconductor external storage device capable of storing the contents stored in the main memory device; #1 A non-volatile external storage device that can store the stored contents of the semiconductor external storage device, and data transfer between the semiconductor external storage device and the semiconductor external storage device based on instructions from the front-end central processing unit. It also has a power supply detection circuit that detects whether power is turned on or off to the system, and data transfer between the semiconductor external storage device and the nonvolatile external storage device is performed based on the detection signal*. Ks when disconnecting the power supply to the external V memory control device and the system? an auxiliary source for supplying at least the semiconductor external storage device, the non-volatile external storage at, and the external storage control device; , Claim III provides an electronic system characterized in that the external storage control device has a data buffer memory that temporarily stores data transferred between the semiconductor external storage device and the non-volatile external storage device. Calculator 7 stem.