JPH0378818A - Data processor - Google Patents

Abstract

PURPOSE:To simplify the start of a data processor by designating a head address of a storage circuit which receives and stores a data processing procedure in combining with a start command. CONSTITUTION:A command register stores a start command and the pointer data. This pointer data is sent to a pointer included in a format control from the command register via a point data line and a gate. The signal transmitted through a start instruction line formed by decoding the start command taken into the command register is transmitted also to the gate. Then the pointer data is set to the pointer with the start of a programmable logic array PLA. As a result, a format buffer is read at and after the address designated by the pointer, and a series of data processing operations are carried out based on a group of commands. Thus the start of a data processor is simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a data processing device, and relates to a technique that is effective for use in peripheral devices such as free format hard disk controllers.

[Conventional technology]

As one of the free format hard disk controllers, the file data processor (hereinafter referred to as
FDP) has been commercialized. This FDP can be set to any byte length and is compatible with a variety of formats.

Note that the hard disk controller can be used, for example, for magazines.
Ia 5'-7 Eighth J N [L84. 1984 5
Published in May, pages 229-237.

[Problem to be solved by the invention]

The FDP receives a processing procedure (command sequence) from an external file management unit (file manager; FM) and stores it in an internal memory (format buffer). After importing such a command sequence, the FDP receives an execution command (start command) from the file manager (local general-purpose processor) and executes data processing according to the imported processing procedure. At this time, it is necessary to set a pointer value (starting address) in the formant bath converter, which is an indirect register, and then set a start command in the command register, which is a direct register.

An object of the present invention is to provide a data processing device that is easy to start up.

The above and other objects and novel features of the present invention will become apparent from the description of this specification and the accompanying drawings.

[Means to solve the problem]

A brief overview of typical inventions disclosed in this application is as follows.

That is, in a data processing circuit that processes data according to the processing procedure stored in a storage circuit that receives and stores a data processing procedure, the start address of the storage circuit is specified in combination with a start command.

[Function] According to the above-described means, the start pointer value can be set by the start command, so it is possible to simplify and speed up the startup.

〔Example〕

Figure 2 shows the file data to which this invention is applied.
A block diagram of one embodiment of a processor (hereinafter simply referred to as FDP) is shown. Each circuit block in the figure is formed on a single semiconductor substrate such as, but not limited to, single-crystal silicon using known semiconductor integrated circuit manufacturing techniques.

The FM interface is FDP as mentioned above.

It constitutes an interface circuit between the host bus controller and a file manager (hereinafter simply referred to as FM) that controls the drive. FDP and FM
The following signals are exchanged between the

The FM receives commands issued from the host bus and decodes them. As a result of deciphering the command, if it is necessary to perform processing such as data read/write, the FM makes necessary settings for the FD and P and issues the command. ECC on data when read from the drive
When an error occurs, the FDP notifies the FM that an error has occurred. When correction is necessary, the FM issues a correction command after making the necessary settings for the FDP. With the result of this command, the FM corrects the data left in the FDP's data buffer.

The transmission and reception of FM and FDP signals as described above is performed via the FM interface. The FM interface sets data in the indirect register, data buffer, and format buffer based on data set in the serial register by the FM, decodes direct commands, and displays command execution status.

The host interface generates signals necessary for data transfer with the host and controls data transfer between the host and the data buffer.

The format buffer stores format commands. The format control automatically writes data to the format buffer when specified data is sent to each indirect register, and when a start command is issued, reads the contents of the format buffer and transfers the code to the next PLA. Output to.

PLA (Programmable Logistics/Array) is
When a start command is issued, the drive interface, ECC, registers, and format control are controlled according to the format command.

The drive interface is made of PLA.
Read/write/convey drive data. It also converts serial data/parallel data.

ECC is ECC, CRC generation, check and ECC
Perform calculations to obtain a correction pattern.

The register stores data and mode setting information necessary for accessing the drive.

The data buffer stores data transferred between the drive and the host. Alternatively, it can also be used as an external RAM for the FM.

Buffer control switches between two buffers during command execution so that accesses from Pothos and from the drive do not conflict.

The timer monitors the number of retries and the manual power of the index pulse.

A port is an input/output data port.

The outline of the data transfer operation of the FDP is as follows.

(1) FM (local processor) receives commands from the host.

(21FM sets the transfer address and number of bytes to FDP.

(3) FM issues a command to FDP.

(4) FDP stores the data read from the disk in the data buffer.

(5) When data storage is completed, the data stored in the data buffer is output to the host (MPU or DMAC).

FIG. 1 shows a block diagram of an embodiment of the main part of the present invention.

The command register is one register included in the FM interface, and in this embodiment, a start command and pointer data are stored in the command register. Pointer data set in this command register is transmitted to a pointer included in the format control via a pointer data line and a gate. A signal through the start instruction line formed by decoding the start command taken into the command register is also transmitted to the gate, and the above pointer data is set in the pointer when the PLA is activated.

As a result, the format buffer is read from the address specified by the pointer, and a series of data processing operations are executed according to the command group.

Under the conventional technology, an address for selecting a format pointer is set in the address register included in the registers shown in FIG. 2, and format buffer pointer data is set in the data register.
Pointers are set via an internal address bus and a data bus (kernel bus). In contrast, in this embodiment, by simply inputting a combination of a start command and pointer data, the command corresponding to the procedure to be processed can be specified directly to the command register.

Incidentally, the configuration using the indirect registers described above required a 5-step instruction (60 cycles) from the host side to start the FDP, but by replacing it with the configuration using direct registers such as the command register described above, it now requires a 2-step instruction (60 cycles) to start the FDP from the host side. 24 cycles), which can significantly reduce the activation of FDP.

The effects obtained from the above embodiments are as follows. In other words, an FD that processes data according to commands stored in a format buffer that receives and stores data processing procedures.
In P, by making it possible to set the start pointer value in combination with the start command, it is possible to simplify and speed up the startup.

Although the invention made by the present inventor has been specifically explained above based on Examples, it goes without saying that the present invention is not limited to the Examples and can be modified in various ways without departing from the gist thereof. Nor. For example, the pointer may have any specific configuration, such as one using an up/down counter circuit that performs +1 or -1 operation every time it operates. The format buffer may be any storage circuit that stores a series of commands as described above.

In addition to the file data processor described above, the present invention can be widely used in data processing devices such as various dedicated processors that process data according to a processing procedure consisting of a command sequence.

〔Effect of the invention〕

A brief explanation of the effects obtained by typical inventions disclosed in this application is as follows. In other words, in an FDP that processes data according to commands stored in a format buffer that receives and stores data processing procedures, by making it possible to set a start pointer value in combination with a start command, it is possible to simplify and speed up startup. become.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the main part of this invention, and FIG. 2 is a fair-isle data system to which this invention is applied.
FIG. 2 is a block diagram illustrating an embodiment of a processor. PLA start

Claims (1)

[Claims] 1. A memory circuit that receives and stores data processing procedures;
A data processing device comprising: a data processing circuit that processes data according to a processing procedure stored in the storage circuit; and a data processing device that specifies a start address of the storage circuit in combination with a start command. 2. The data processing according to claim 1, wherein the data processing device is a free format hard disk controller that processes data exchange between a host computer and a hard disk memory device. Device.