JPH07210339A - Data processor - Google Patents

Abstract

PURPOSE:To efficiently process the different kinds of data. CONSTITUTION:In a storage area 110a and a page memory 110b, the data suitable for a processing by each block unit and the data not suitable for that are respectively stored. A processing request detection part 140 detects the kind of the data by a processing request from a general purpose computer 12 or an input device 130. Depending on the kind of the data, the data from the general purpose computer 12 are stored by respective blocks in the storage area 110a and successively transferred to a block processing part 170 and the processings of compression and expansion, etc., are performed. For a font data processing request from the input device 130, font data inside the page memory 110b are transferred to a font processing part 200 and processed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data processing device, and more particularly to a data processing device suitable for efficient data processing according to the type of data stored in a system memory.

[0002]

2. Description of the Related Art There is known a data processing device that processes data taken in from an external device such as a general-purpose computer or a personal computer (personal computer) or data created in a system according to an instruction. FIG. 10 is a block diagram showing a configuration of a data processing device configured to perform processing such as compression / expansion / rotation on the supplied data and output the data to an external storage device or a printer. In the figure,
The general-purpose computer 12 as an external device divides a block of data to be processed into a plurality of blocks and outputs the blocks to the data processing device 1 via the channel 11. The data input to the data processing device 1 is transferred to the system memory 9 via the communication device 8. In each block sent from the general-purpose computer 12, the size of the block, that is, the number of pieces of data, the block at the beginning, the block in the middle, the block at the end, and the like are determined. The status information and the actual data to be shown are included.

After receiving the block from the general-purpose computer 12, the CPU 2 requests the process executing section 10 to process the block. The processing execution unit 10 reads only the actual data from the system memory 9 excluding the status information from the system memory 9 and performs data processing such as compression / decompression. The processed data is sent to the data output device 5. The data output device 5 develops the input data into bitmap data and outputs the data to the printer 6.

In some cases, the processed data may not be output to the data output device 5 but may be temporarily stored in the external storage device 4 such as a hard disk device as needed. Further, the data processing device is provided with a DMA controller (DMAC) 3 for performing DMA transfer of data. An apparatus for processing blocks supplied from a processor unit as an external device is disclosed in Japanese Patent Laid-Open No. 63-254.
It is disclosed in Japanese Patent No. 554.

Further, Japanese Patent Application Laid-Open No. 3-10354 discloses that
An apparatus is disclosed which aims to improve the transfer efficiency when performing DMA transfer of blocks. With this device,
A plurality of buffers corresponding to the size of a block to be transferred and a block status holding area corresponding to the buffers are prepared. Then, while referring to the block status, processing can be alternately performed on one block from both the DMA controller and the processor.

[0006]

The above-mentioned conventional device has the following problems. That is, in the conventional data processing device, in order to efficiently transfer data from an external device such as a general-purpose computer to a system memory, one block of data is divided into blocks and processed. However, depending on the type of data, the above-described processing in block units may not be appropriate.

For example, in the data processing apparatus 1, the system memory 9 may be used as a page memory to create font data. In this case, the created font data is expanded in the system memory 9. An example of font data expanded on the system memory 9 is shown in FIG. As shown in the figure, the font data is
The start address Sa, the size X in the x direction (= the number of data m), the size Y in the y direction (the number of lines n), and the data offset OS (OS between adjacent lines)
1 + OS2).

When this font data is processed in block units, n for storing actual data of block length X
A block storage area for lines and a status storage area for n lines for storing status information are secured in the system memory 9 separately from the page memory. Then, the font data created thereafter is transferred to the block storage area separately for n blocks, and this block is transferred to the process execution unit 10 to actually execute the process.

As described above, when the above font data is processed in block units by the conventional method, it is necessary to secure a large number of block storage areas and status storage areas, and also a large number of blocks in the system memory 9. However, there is a problem in that the processing becomes complicated because of the movement of.

In view of the above problems, it is an object of the present invention to provide a data processing apparatus capable of selecting and executing the most efficient processing according to the type of processing target stored in the system memory. And

[0011]

SUMMARY OF THE INVENTION To solve the above problems and to achieve the object, the present invention provides a block storage area provided in a system memory for storing block data fetched from an external device, A page memory provided in the system memory for expanding internally generated font data, a data processing execution means for processing the block data and the font data, an instruction input from an external device and an internally generated instruction. Based on the instruction, an instruction determination unit that detects the type of the processing target and outputs a block detection signal and a font detection signal, and a transfer permission is output to an external device according to the block detection signal, and the block data is sequentially transferred to the storage area And a transfer control means for confirming the transfer of the block data and outputting a processing start instruction, While outputting the block data processing instructions to the data processing executing means based on the serial processing start instruction,
It is characterized in that a data processing control means for outputting a font data processing command to the data processing execution means according to the font detection signal is provided.

[0012]

According to the above construction, the type of the processing target is discriminated according to the instruction from the outside or the instruction generated inside. When the processing target is block data, the block data is read from the external device into the block storage area, and a processing start instruction is output to the data processing execution means.
On the other hand, when the processing target is font data, a processing start instruction is output to the data processing execution means, and the font data is read from the page memory and processed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings. 2 is a block diagram showing a hardware configuration of a main part of a data processing apparatus according to an embodiment of the present invention, and the same reference numerals as those in FIG. 10 indicate the same or equivalent portions.

In FIG. 2, the process execution unit 10 is connected to the bus 7 via the interface 20. The bus 25 inside the process execution unit 10 has a DMA controller (second
The DMAC 19, the second CPU 18, and the second system memory 24 are connected. A DMA controller (third DMAC) 21 is provided on the bus 26 inside the processing execution unit 10.
And the memory 23 are connected. A compression / decompression device 22 and a bus 25 are provided between the buses 25 and 26.
And a bus switching device (BS) 40 for switching the bus 26
Is provided.

The interface 20 has a start means 35 having a flag indicating the start of data processing, a restart means 36 having a flag indicating the restart of data processing, that is, the start of divided transfer of blocks, and a flag indicating the end of command processing. A command terminating means 37 having a flag and a terminating means 38 having a flag indicating the end of the block processing are provided.

In the configuration of FIG. 2, the blocks transferred from the general-purpose computer 12 via the communication device 8 are temporarily stored in the storage area provided in the system memory 9. After that, the blocks are sequentially loaded into the second system memory 24 of the processing execution unit 10, and scheduled data processing such as decompression processing in the compression / decompression device 22 is performed. The data-processed blocks are accumulated in the memory 23, and when the data processing of all blocks is completed, the processed blocks are returned to the system memory 9.

Further, the CPU 2 creates font data using the system memory 9 as a work area, and expands the data in the page memory secured in the system memory 9. The font data expanded in the page memory is transferred to the processing execution unit 10, processed, and returned to the planned return destination in the system memory 9.

Next, a table of control information used for transfer processing of block and font data and data processing in the processing execution unit 10 will be described. FIG. 3A is a diagram showing a processing command. The processing command T1 includes a data table T which will be described later with reference to FIGS. 3B and 3C.
2, the start address of T3, that is, the start address of the table header, the data processing information instructed from the general-purpose computer 12 or the CPU 2, the start address of the data return destination, the number of data that can be stored in the return destination, that is, the size of the return area. , The number of returned data is described.
The data processing information describes the contents to be processed by the processing execution unit 10, such as “compression”, “expansion”, and “rotation”. The data return destination is the system memory 9
This is an area that is provided inside and returns the data processed by the processing execution unit 10. The number of returned data is described after the data processing.

FIG. 3 (b) is a data table relating to data of a type (hereinafter referred to as "type 1") suitable for processing in block units. The data table T2 is provided with a table header 31 and a data section 32. To be The table header 31 describes the size of the data section 32, the size of the table header 31, the storage end status, and the type of processing target, that is, “type 1”. The storage end status is information indicating that the block transfer from the general-purpose computer 12 has ended.

In the data section 32, the number of storage blocks N, the number of processing end blocks M, the start address of the storage area for storing the transferred blocks, and the number of blocks of data stored in the storage area are described. It In this embodiment, a case where two storage areas are provided will be described, and each storage area is referred to as a first storage area and a second storage area.

FIG. 3C is a data table relating to data of a type (hereinafter referred to as "type 0") that is not suitable for processing in block units. Here, font data will be described as type 0 data. A table header 33 and a data section 34 are provided in the data table T3. The table header 33 describes the size of the data section 34, the size of the table header 33, the storage end status, and the type of processing target, that is, “type 0”. In the data section 34, the start address of the page buffer where the font data is expanded, that is, the start address, the font data size X, size Y, and offset OS are described.

Next, the operation for storing the blocks supplied from the general-purpose computer 12 in the system memory 9 will be described with reference to the flow charts of FIGS.
In FIG. 4, in step S0, it is determined whether or not there is a data transfer request, and if there is a transfer request, the process proceeds to step S1. In step S1, whether the transfer request is based on a data transfer request from an external general-purpose computer 12 or a font data transfer request based on an internal command of the system, that is, either "type 1" or "type 0" data. It is determined whether it is a transfer request. If the data is "type 1", the process proceeds to step S2, and if the data is "type 0", the process proceeds to step S34.

First, in step S2, the block size of the block supplied from the general-purpose computer 12 or held by the CPU 2 is read. This block size is the maximum size of one block, that is, the maximum number of data, and together with the transfer request, the general-purpose computer 12
To the communication device 8 or depending on the model of the general-purpose computer to which the CPU 2 is connected, the CPU
2 holds.

In step S3, the general-purpose computer 12
A storage area for storing the block transferred from is secured in the system memory 9. It is necessary to secure at least two storage areas, but in this embodiment it is assumed that two storage areas are provided. In step S4,
The number of secured storage areas is parameter B. That is, since the first and second storage areas are provided in this embodiment, the parameter B is set to "2".

In step S5, the parameter "b1" for designating one of the first and second storage areas is set to the numerical value "1" for designating the first storage area. Thereafter, the block transfer process is performed on the storage area corresponding to the parameter b1. When the parameter b1 is "1", the transfer processing is executed in the first storage area, and when the parameter b1 is "2", the transfer processing is executed in the second storage area.

At step S6, the transfer permission is issued by notifying the communication device 8 of the address of the first storage area indicated by the parameter b1, that is, "1". The transfer permission is notified from the communication device 8 to the general-purpose computer 12. In step S7, the block supplied from the general-purpose computer 12 is received, and the block is transferred to the first storage area.
In step S8, it is determined from the header of the block whether the fetched block is the final block. If it is not the final block, the process proceeds to step S11. Step S11
Then, secure areas for processing commands and data tables. Further, the initial value "0" is set to the number of blocks M to be processed.

In step S9, the processing command T1 is set. Specific information is written in the table start address, the processed data return destination start address, and the number of return area data, but since the data processing has not been completed at this point, the specific number of return data is specified. No data is written, only the area for writing this is reserved. In step S10, the table header for the data table T2 is set, and the information indicating "transferring" is set in the storage end status. Step S
In 12, the parameter of the data table indicating the number of blocks fetched in the system memory 9, that is, the number of stored blocks N is set to "1".

Subsequently, in step S13 of FIG. 5, the start address of the storage area designated by the parameter b1 and the number of blocks of data transferred from the general-purpose computer 12 to the storage area are stored in the data section. The first block start address and the first block data count are described.

In step S14, a processing command storage address and a start signal for requesting the start of processing are sent to the processing execution unit 10. The start means 35 provided in the interface 20 of the processing execution unit 10 is set by this address and the start signal. In step S15, a division transfer start signal requesting division transfer is sent to the processing execution unit 10. The division transfer start signal sets the resuming means 36 provided in the interface 20 of the processing execution unit 10. By outputting the start signal and the division transfer start signal, the process execution unit 10 can start the process.

In step S16, the parameter b1 is incremented. In step S17, it is determined whether the block can be read from the general-purpose computer 12 into the storage area corresponding to the parameter b1 of the first storage area and the second storage area. This judgment is made based on the difference between the number N of stored blocks and the number M of processing end blocks. That is, when the difference between the number of storage blocks N and the number of processing end blocks M is not the same as the secured storage area, at least one of the blocks fetched from the general-purpose computer 12 is left in the storage area. It can be determined that the data processing has been completed and a new block can be transferred.

If the determination in step S17 is affirmative, the flow advances to step S18 to notify the communication device 8 of the address of the storage area designated by the parameter b1 and issue a transfer permission. The transfer permission is transmitted from the communication device 8 to the general-purpose computer 12
Will be notified. In step S19, the next block supplied from the general-purpose computer 12 is received, and the block is transferred to the storage area notified of the transfer destination address. In step S20, the storage block number N is incremented (= + 1).

In step S21, the start address of the storage area designated by the parameter b1 and the number of blocks of data transferred from the general-purpose computer 12 to the storage area are described in the data section. For example, when the parameter b1 is "2", specific data is written in the second block start address and the second block data count.

In step S22, it is determined whether the number B of storage areas is the same as the number of parameters b1. If the numbers are the same, the process proceeds to step S23, and "0" is set to the parameter b1. On the other hand, if they are not the same number, step S23 is skipped and the process proceeds to step S24. In step S24, it is determined whether the received block is the final block. If it is not the final block, the process proceeds to step S15.
After that, step S1 is performed until the final block is received.
The processing of 5 to S23 is repeated. As a result, the blocks from the general-purpose computer 12 are alternately stored in the two storage areas of the reception blocks secured in the system memory 9, and the blocks stored in the two storage areas are stored in the processing execution unit 10. It will be transferred alternately.

On the other hand, in the case of the final block, step S2
In step 5, the information indicating "transfer end" is set in the storage end status of the table header of the data table T2. In step S26, a division transfer start signal for instructing division transfer is sent to the processing execution unit 10.

If the determination in step S8 (FIG. 4) as to whether it is the final block is affirmative, step S8
Proceed to 29. If the determination in step S8 is affirmative, there is one block transferred from the general-purpose computer 12. The steps S27 to S31 are the same as the steps S9 to S13, and the description thereof will be omitted. In step S32, "transfer end" is set in the storage end status, and in step S33, the storage address of the processing command and the start signal requesting the processing start are sent to the processing execution unit 10.

On the other hand, if the determination in step S1 is negative,
That is, if it is a transfer request for font data of "type 0", the process proceeds to step S34, and an area (font return destination) for returning the processed data is secured in the system memory 9. In step S35, a processing command relating to the font data is set. The setting of this processing command is the same as in step S9. In step S36, the table header 33 is set. That is, the table header 33
And the size of the data part 34 are set,
Set "Transfer end" to the storage end status. Here, it is assumed that the font data is the "type 0" data, and since the font data has already been expanded in the system memory 9, the transfer end status is set to "transfer end".

In step S37, the data section 34 is set. That is, the start address of the page buffer where the font data is expanded, the size X and size Y of the font data, and the offset OS are described. In step S38, the storage address of the processing command and a start signal requesting the start of processing are sent to the processing execution unit 10.

Next, the operation of the processing execution unit 10 that processes the data stored in the first and second storage areas of the system memory 9 will be described with reference to the flowchart of FIG. In the figure, in step S43, it is determined whether or not the start signal of the starting means 35 is set, that is, whether or not the start signal is input in step S14 or step S38 of FIG.
If the start signal of the starting means 35 has been set, after recognizing the setting, the process proceeds to step S44 to read the processing command storage address of the starting means 35 and reset the start signal. In step S45, the processing command is read according to the processing command storage address, and each device of the processing execution unit 10, such as the compression / expansion device 22, is initialized. In step S46, the contents of the table header are read, and the storage end status and data type are confirmed. In step S47, it is determined from the table header whether the data type is "type 1". If the data is "type 1", the process proceeds to step S48, and if "type 0", the process proceeds to step S62.

First, in the case of "type 1", step S4
At 0, "1" is set to the parameter b2 designating the storage block. Thereafter, data processing is executed on the storage block corresponding to the parameter b2. That is, when the parameter b2 is “1”, the first storage area
When the parameter b2 is "2", data processing for the second storage area is executed. In step S41, the number of reserved storage areas, that is, "2" in this embodiment is set in the parameter B. In step S48, whether or not the restarting means 36 is set, that is, step S in FIG.
It is determined whether or not the division transfer start signal transmitted at 15 is set. If the resuming means 36 is set, the process proceeds to step S49 to reset the resuming means 36, that is, reset the division transfer signal. In step S50, the data part of the data table T2 is read.
In other words, the number of stored blocks N, the number of processing end blocks M,
In addition, the top address of the storage area where the block is stored is read.

In step S51, it is determined whether or not the processing of all the blocks stored in the storage area has been completed. This determination is made based on whether or not the number of stored blocks N and the number of blocks M to be processed are the same. If it is determined that there is a block whose processing has not ended, step S52.
Proceed to. In step S52, a block is read from the storage area corresponding to the parameter b2 and data processing is performed. The data processing is processing indicated by the data processing information of the processing command, such as compression processing. The processed block is temporarily stored in the memory 23.

In step S53, the end means 38 is set to notify the CPU 2 of the end of the block processing.
In step S54, the number M of blocks to be processed is incremented. In step S55, parameters B and b2
Judge whether and are the same value. If the values are the same, step S5
6, the parameter b2 is set to "1", and the process proceeds to step S51. If the parameters B and b2 are not the same, the process proceeds to step S57, the parameter b2 is incremented, and the process proceeds to step S51. Parameter b determined by the processing of steps S55 to S57
According to 2, the data processing procedure for the next storage block is executed.

On the other hand, if the determination in step S51 is negative, the process proceeds to step S58 and it is determined whether or not the processing of the final block is completed. If not the last block
The process advances to step S48 to wait for the next division transfer start signal.

By the above processing, the system memory 9
The block data that is alternately stored in the two storage areas inside is processed alternately by the processing execution unit 10. When it is determined that the processing of the final block has been completed and the result of step S58 is affirmative, the process proceeds to step S59, and the return determined by the return start address in the system memory 9 whose address is indicated by the processing command T1. The processed data is returned first. That is, the processed data stored in the processor memory 23 is
The data is returned to the planned return destination in the system memory 9 via the bus switching device 40 and the interface 20. In step S60, the number of returned data is set in the processing command. In step S61, the command end means 37 indicating the end of command processing is set.

If the determination in step S47 is negative, that is, if the data is "type 0", the process of FIG. 7 is performed. In step S62 of FIG. 7, the data part 34 of the “type 0” data table T3 is read, and the start address on the page memory where the font data is stored,
Check the size X, size Y, and offset OS.

In step S63, "1" is set to the parameter n indicating the number of lines. In step S64, n
The data of the line is read and the data of size X of the line is processed. In step S65, it is determined whether or not the processing of all the lines of the font data has been completed. This judgment is made based on whether or not the size Y and the parameter n match. If they do not match, that is, if the processing for all the lines has not been completed, the process proceeds to step S66 and the parameter n is incremented. If the size Y and the parameter n match, the process proceeds to step S59 in FIG.

As described above, in this embodiment, when the type of data is "type 1", two storage areas are provided, and the block transferred from the general-purpose computer 12 is the storage area designated by the parameter b1. It was made to transfer alternately to. Then, in the processing execution unit 10, the parameter b
The blocks are alternately read from the storage area designated in 2 and the scheduled data processing is executed. As will be understood from the flowchart, even when two or more storage areas are secured, the storage areas can be sequentially designated by the parameter b1 or b2, and block transfer and data processing are executed.

Next, the timing of block transfer and data processing will be described with reference to the timing chart. FIG. 8 is a timing chart when the processing time in the processing execution unit 10 is shorter than the transfer time of the CPU 2, and is an example of processing for four blocks. In the figure, the process execution unit 10 is in a start waiting state until the start means 35 and the restart means 36 are set, that is, the start signal s1 and the division transfer start signal s2 are turned on.
When the transfer of the first block (1 block data) is completed by the processing of the CPU 2 and the communication device 8,
The start signal s1 and the division transfer start signal s2 rise, and the start means 35 and the restart means 36 are set.
After confirming that the starting unit 35 and the restarting unit 36 are set, the process executing unit 10 starts the process of one block at timing t1 and resets the restarting unit 36. Starting means 35
Also, after confirming that it has been set, the process execution unit 1
Reset immediately by 0.

When the processing of one block is completed, the processing execution unit 10 notifies the CPU 2 of the end of the block by an interrupt and waits for the restarting means 36 to be set again (s2).
Wait). When the transfer of the second block (2 block data) is completed, the division transfer start signal s2 rises again, and the restart means 36 is set. The process execution unit 10
After confirming that the resuming means 36 has been set, processing of two blocks is started at timing t2, and the resuming means 36 is reset. When the processing of the two blocks is completed, the CPU 2 is notified of the end of the block by an interrupt. Hereinafter, similarly, the process execution unit 10 executes the process while alternately storing the four blocks in the two storage areas. Note that the storage end status is initially set to “transferring”, and when four blocks are transferred to the storage area, “transfer end” is set.

In FIG. 9, the processing time in the processing execution unit 10 is C
It is a timing chart when it takes longer than the transfer time of PU2. In this example, since the start signal s1 and the division transfer start signal s2 rise after transferring one block of data to one storage area, the process execution unit 10 starts the process of one block at timing t1. On the other hand, since the transfer time is faster than the processing time in the process execution unit 10, after the two block data is transferred to the second storage area, the blocks cannot be transferred to the storage area continuously, and the CP
U2 waits for a block end notification sent from the process execution unit 10 (waiting for an interrupt). Then, when the processing execution unit 10 completes the processing of one block and the completion of the block is notified by an interrupt, the three blocks are taken into the first storage area, and the processing of the two blocks is started at timing t2. Similarly, after fetching a block, the process execution unit 10 waits for an interrupt to fetch the next block in the storage area, and the process of the block is executed up to the last block.

Next, the main functions of the data processing device that performs the above operation will be described. FIG. 1 is a block diagram of a main part of a data processing device. In the figure, the storage area 110a is
It comprises at least two storage areas for storing the blocks requested to be processed by the general-purpose computer 12. On the other hand, the page memory 110b is a storage area for expanding font data. The storage area 110a and the page memory 110b are both provided in the system memory 9. The transfer control unit 100 performs control for fetching blocks from the general-purpose computer 12 into the storage area 110a via the communication device 8. Font data creation unit 120
Calculates the start address, font size, etc. from the print data supplied from the input device 130, and develops the font data in the page memory 110b. The processing request detection unit 140 detects a block data processing request from the general-purpose computer 12 in the communication device 8 and outputs a detection signal a, and outputs a detection signal b when a font data processing request from the input device 130 is detected. . The detection signal a is the transfer control unit 1
00 and the data processing control unit 150, and the detection signal b is input to the font data creation unit 120 and the data processing control unit 150.

When the detection signal a is input, the transfer control unit 100 outputs a transfer permission to the communication device 8 and at the same time, an address for designating a plurality of storage areas of the storage area 110a alternately or in order. Supply to area 110a. When the block is transferred to the designated address of the storage area 110a, the head address of the storage area 110a to which the block is transferred is written in the block data table 160, and the number of storage blocks N is described. Further, when the detection signal b is input, the font data creation unit 120 outputs the font data address, font size, offset, and the like to the font data table 190.

When the detection signal a is input, the data processing control section 150 supplies a read address to the storage area 110a to designate a plurality of storage areas of the storage area 110a alternately or in order, and then to the block processing section 170. Read the block. Further, the data processing control unit 150 determines that the detection signal b
Is input, the read address is supplied to the page memory 110b and the font data is output line by line to the font processing unit 200. The block processing unit 170 and the font processing unit 200 execute processes such as compression / expansion on the read blocks and font data.
When the scheduled data processing ends, the data processing control unit 150 notifies the processing end, and the block data table 160
The processing completion block number M is incremented.

Further, the transfer control unit 100 determines the data processing state of the storage area 110a based on the number of storage blocks N and the number of processing end blocks M of the block data table 160. Then, it is determined whether or not the block can be transferred to the storage area 110a according to the data processing state. If the block cannot be transferred, the output of the transfer permission to the communication control unit 8 is prohibited.

Similarly, the data processing control unit 150 determines the data processing state of the storage area 110a based on the storage block number N and the processing end block number M of the block data table 160. Then, the presence or absence of unprocessed data is determined according to the data processing state, and if there is no unprocessed block, the block processing unit 170 is placed in a waiting state. The storage unit 1 stores the block or font data that has been processed.
It is once stored in 80, and after all processing of a series of blocks or font data is completed, it is returned to a return destination (not shown).

As described above, according to the present embodiment, even if the number of blocks to be transferred or the total data amount is not known in advance, such as in the block transfer from the general-purpose computer 12, the data of one block is transferred. Data can be received if a storage area twice the size is secured in the system.

If the type of data to be processed is determined and the number of divided blocks is large due to its nature and the processing becomes complicated, it is not divided into blocks and the data type and data Created a table that describes information such as size. Then, the processing execution unit 10 can efficiently perform data processing by referring to this table.

In this embodiment, the transfer timing to the storage area and the read timing from the storage area are determined based on the number of storage blocks and the number of processing end blocks. However, the present invention is not limited to this. A storage flag or a processed flag may be provided for each storage area, and the data state of the storage area may be determined by this flag. If a large number of storage areas are not provided, it is more convenient to make a determination based on the stored flag or processed flag.

[0058]

As is apparent from the above description, according to the inventions of claims 1 and 2, it is possible to determine whether or not the processing target is suitable for the processing in block units. Then, it is possible to execute the data processing by selecting the optimum transfer mode according to the determined type of the processing target.

In particular, according to the second aspect of the invention, when it is recognized from the determination result that the processing target is block data supplied from outside, at least two blocks of storage area for storing the data are stored in the system memory. The data is secured inside, the data is once taken in, and then transferred to the data processing execution means for sequential processing.

That is, according to the present invention, when the processing target is block data, it is suitable for block processing.
Data is stored for each block in the storage area, and then sequentially transferred to the data execution means for processing. On the other hand, when the processing target is font data, the data can be transferred from the page memory in the system memory to the data processing execution means for processing.

Therefore, even if the objects to be processed are different, the data is not moved in the system data, and the data is not divided into blocks when it is not necessary. Can be done.

[Brief description of drawings]

FIG. 1 is a block diagram showing a main function of a data processing device showing an embodiment of the present invention.

FIG. 2 is a block diagram showing a hardware configuration of a data processing device showing an embodiment of the present invention.

FIG. 3 is a diagram showing the contents of a control data table.

FIG. 4 is a flowchart (1) showing a block transfer operation.

FIG. 5 is a flowchart (part 2) showing the block transfer operation.

FIG. 6 is a flowchart (1) showing a data processing operation.

FIG. 7 is a flowchart (part 2) showing the data processing operation.

FIG. 8 is a timing chart of the transfer process and the data process when the transfer process is slow.

FIG. 9 is a timing chart of transfer processing and data processing when the transfer processing is fast.

FIG. 10 is a block diagram showing a hardware configuration of a conventional data processing device.

FIG. 11 is a diagram showing a font position on a system memory.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Data processing device, 8 ... Communication device, 10 ... Process execution part, 12 ... General purpose computer, 100 ... Transfer control part, 110a ... Storage area, 110b ... Page memory, 120 ... Font data creation part, 130 ... Input device, 140 ... Processing request detection unit, 150 ... Data processing control unit, 170 ... Block processing unit

Claims (2)

[Claims] 1. A block storage area provided in a system memory for storing block data fetched from an external device, and a page memory provided in the system memory for expanding internally created font data. A data processing execution means for processing the block data and the font data, and a block detection signal and a font detection signal are detected by detecting the type of the processing target based on an instruction input from an external device and an instruction generated internally. Instruction determination means for outputting, transfer control means for outputting transfer permission to an external device in accordance with the block detection signal, sequentially transferring block data to a storage area, and confirming transfer of block data and outputting a processing start instruction Block data processing to the data processing execution means based on the processing start instruction. While for outputting a command, the accordance font detection signal, the data processing apparatus characterized by comprising a data processing control means for outputting a font data processing instructions to the data processing executing means. 2. At least two block storage areas provided in a system memory for storing block data fetched from an external device and having a size capable of storing one block of the block data; A page memory provided in the system memory for expanding the font data, a data processing execution means for processing the block data and the font data, transfer permission / inhibition information of the block data for each block storage area, and each block storage area Block data information registering means for registering unprocessed block data presence / absence information, font data information registering means for registering information on font data developed in the page memory, instructions input from the external device and internal Instructions generated in Instruction discriminating means for detecting the type of processing object based on the block detection signal and font detection signal, and output of transfer availability information and unprocessed block data presence / absence information to the block data information registration means according to the block detection signal And a transfer control that outputs a transfer permission to the external device based on the transfer availability information, sequentially transfers the block data to each of the block storage areas, and outputs a processing start instruction every time the block data is transferred. Means for outputting a block data processing command to the data processing execution means based on the unprocessed block data presence / absence information and the processing start signal according to the block detection signal, and the transfer control means for each processing end of each block data. While outputting the processing end signal to the And a data processing control means for outputting a font data processing command to the data processing execution means.