JP3259503B2 - Data processing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data processing apparatus, and more particularly to a data processing apparatus suitable for efficiently performing 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 apparatus for processing data taken from an external device such as a general-purpose computer or a personal computer (PC) or data created in a system in accordance with an instruction. FIG. 10 is a block diagram showing a configuration of a data processing apparatus configured to perform processing such as compression, decompression, and rotation on supplied data and output the processed 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 plurality of blocks to the data processing device 1 via the channel 11. Data input to the data processing device 1 is transferred to the system memory 9 via the communication device 8. Each block sent from the general-purpose computer 12 indicates the size of the block, that is, the number of data, whether the block is the first block, the middle block, the last block, and the like. Status information and actual data.

After receiving a block from the general-purpose computer 12, the CPU 2 requests the processing execution unit 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 blocks, and performs data processing such as compression and decompression. The processed data is sent to the data output device 5. The data output device 5 expands the input data into bitmap data and outputs the data to the printer 6.

In some cases, the processed data is not output to the data output device 5 but is temporarily stored in an 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 JP-A-63-254.
No. 554 discloses this.

[0005] Also, JP-A-3-10354 discloses that
There is disclosed an apparatus aiming at improving the transfer efficiency when a block is DMA-transferred. In this device,
A plurality of buffers corresponding to the size of the block to be transferred and a block status holding area corresponding to the buffer are prepared. The configuration is such that the DMA controller and the processor can alternately perform processing on one block while referring to the block status.

[0006]

The above-mentioned conventional apparatus 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 the 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, font data may be created using the system memory 9 as a page memory. In this case, the created font data is expanded in the system memory 9. FIG. 11 shows an example of the font data developed on the system memory 9. As shown in FIG.
The start address Sa, the size X in the x direction (= number of data m), the size Y in the y direction (= number of lines n), and the data offset OS between adjacent lines (OS
1 + OS2).

When the font data is processed in units of blocks, n for storing actual data having a block length X is used.
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 created font data is transferred to the block storage area by dividing into n blocks, and this block is transferred to the processing execution unit 10 to actually execute the processing.

As described above, when the above-described 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 a large number of blocks in the system memory 9. However, there is a problem that the processing is complicated because of the movement of the image.

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

[0011]

SUMMARY OF THE INVENTION In order to solve the above problems and 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 font data generated internally, data processing executing means for processing the block data and font data, instructions input from an external device, and instructions generated internally. Instruction discriminating means for detecting the type of the processing target based on the instruction and outputting a block detection signal and a font detection signal, respectively, outputting a transfer permission to an external device according to the block detection signal, and sequentially transferring the block data to the storage area 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,
Data processing control means for outputting a font data processing instruction to the data processing execution means in accordance with the font detection signal.

[0012]

According to the above arrangement, the type of the processing target is determined according to an external instruction or an internally generated instruction. If 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, if 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 below in detail with reference to the drawings. FIG. 2 is a block diagram showing a hardware configuration of a main part of the data processing apparatus according to one embodiment of the present invention, and the same reference numerals as those in FIG. 10 indicate the same or equivalent parts.

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

The interface 20 includes a start means 35 having a flag indicating the start of data processing, a restart means 36 having a flag indicating restart of data processing, that is, a start of divisional transfer of blocks, and a flag indicating end of command processing. And a ending means 38 having a flag indicating the end of the block processing.

In the configuration of FIG. 2, blocks transferred from the general-purpose computer 12 via the communication device 8 are temporarily stored in a storage area provided in the system memory 9. Thereafter, the blocks are sequentially taken into the second system memory 24 of the processing execution unit 10 and scheduled data processing such as expansion processing by the compression / expansion device 22 is performed. The blocks subjected to the data processing are accumulated in the memory 23, and when the data processing of all the 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 develops the data in a page memory secured in the system memory 9. The font data expanded in the page memory is transferred to the processing execution unit 10 where the font data is processed and returned to a predetermined return destination in the system memory 9.

Next, a table of control information used for block and font data transfer processing and data processing in the processing execution unit 10 will be described. FIG. 3A shows a processing command. The processing command T1 includes a data table T 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 by 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.
The data processing information describes contents to be processed by the processing execution unit 10, such as “compression”, “decompression”, and “rotation”. The data return destination is the system memory 9.
And an area where data processed by the processing execution unit 10 is returned. The number of returned data is described after data processing.

FIG. 3B shows a data table relating to data of a type (hereinafter referred to as "type 1") suitable for processing in units of blocks. The data table T2 includes a table header 31 and a data section 32. Can 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 been completed.

The data section 32 describes the number N of storage blocks, the number M of processing end blocks, the start address of a storage area for storing transferred blocks, and the number of data of blocks stored in the storage area. You. In this embodiment, a case where two storage areas are provided will be described, and each storage area will be 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. The data table T3 is provided with a table header 33 and a data section 34. 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”. The data section 34 describes the start address of the page buffer in which the font data is expanded, that is, the start address, and the font data size X, size Y, and offset OS.

Next, the operation for storing blocks supplied from the general-purpose computer 12 in the system memory 9 will be described with reference to the flowcharts of FIGS.
In FIG. 4, in step S0, the presence or absence of a data transfer request is determined. If there is a transfer request, the process proceeds to step S1. In step S1, the transfer request is based on a data transfer request from the external general-purpose computer 12 or a font data transfer request based on a command inside the system, that is, any of "type 1" and "type 0" data. Is determined to be 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 a 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.
From the communication device 8 or, depending on the model of the general-purpose computer to which the CPU 2 is connected,
2 holds.

In step S3, the general-purpose computer 12
In the system memory 9, a storage area for storing blocks transferred from the server is secured. Although it is necessary to secure at least two storage areas, this embodiment assumes a case where two storage areas are provided as described above. In step S4,
The number of secured storage areas is defined as parameter B. That is, in this embodiment, since the first and second storage areas are provided, “2” is set as the parameter B.

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

In step S6, the parameter b1, that is, the address of the first storage area indicated by "1" is notified to the communication device 8 and a transfer permission is issued. The transfer permission is notified from the communication device 8 to the general-purpose computer 12. In step S7, a 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 whether or not the fetched block is the last block from the header of the block. If it is not the last block, the process proceeds to step S11. Step S11
Then, an area for the processing command and the data table is secured. In addition, an initial value “0” is set to the number M of processing end blocks.

In step S9, a processing command T1 is set. While specific information is written in the table top address, the post-processing data return destination start address, and the number of return area data, since the data processing has not yet been completed at this point, the specific information is written in the return data number. No data is written, and only an area for writing this is secured. In step S10, a table header for the data table T2 is set, and information indicating "transferring" is set in the storage end status. Step S
In step 12, "1" is set to the parameter of the data table indicating the number of blocks taken into the system memory 9, that is, the number N of storage blocks.

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

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

In step S16, the parameter b1 is incremented. In step S17, it is determined whether it is possible to read a block from the general-purpose computer 12 into the storage area corresponding to the parameter b1 out of the first storage area and the second storage area. This determination is made based on the difference between the storage block number N and the processing end block number M. That is, when the difference between the number N of storage blocks and the number M of processing end blocks is not the same as the number of secured storage areas, 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 process proceeds to step S18, where the address of the storage area specified by the parameter b1 is notified to the communication device 8 and a transfer permission is issued. 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 in which the transfer destination address has been notified. In step S20, the number N of storage blocks is incremented (= + 1).

In step S21, the head address of the storage area specified by the parameter b1 and the number of data of the block transferred from the general-purpose computer 12 to the storage area are described in the data portion. For example, when the parameter b1 is “2”, specific data is written to the second block head address and the second block data number.

In step S22, it is determined whether or not the number B of storage areas is equal to the number of parameters b1. If the numbers are the same, the process proceeds to step S23, where "0" is set to the parameter b1. On the other hand, when both are not the same, step S23 is skipped and the process proceeds to step S24. In step S24, it is determined whether the received block is the last block. If it is not the last block, the process proceeds to step S15.
Thereafter, step S1 is performed until the last block is received.
Steps S5 to S23 are 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 sent to the processing execution unit 10. It will be transferred alternately.

On the other hand, in the case of the last block, step S2
Proceeding to 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 split transfer start signal for instructing split transfer is sent to the processing execution unit 10.

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

On the other hand, if the determination in step S1 is negative,
In other words, if it is a request to transfer “type 0” font data, 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 related 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 section 34,
Set "Transfer end" to the storage end status. Here, font data is assumed as “type 0” data, and since the font data has already been developed in the system memory 9, “storage end” is set as the storage end status.

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

Next, the operation of the processing execution unit 10 for performing data processing of the blocks stored in the first and second storage areas in the system memory 9 will be described with reference to the flowchart of FIG. In the figure, in a 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 inputted in the step S14 or the step S38 in FIG.
If the start signal of the start means 35 has been set, after recognizing the set, the process proceeds to step S44 to read the processing command storage address of the start 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 the data type are confirmed. In step S47, it is determined from the table header whether the data type is "type 1". If it is "type 1" data, the process proceeds to step S48, and if it is "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 for specifying the storage block. Hereinafter, data processing is performed on the storage block corresponding to the parameter b2. That is, when the parameter b2 is "1",
When the parameter b2 is "2", data processing for the second storage area is executed. In step S41, the number of secured storage areas, that is, “2” in this embodiment, is set in the parameter B. In step S48, it is determined whether or not the resuming means 36 has been set, that is, whether or not
It is determined whether or not the division transfer start signal sent at 15 is set. If the resuming means 36 has been set, the flow advances to step S49 to reset the resuming means 36, that is, reset the divided transfer signal. In step S50, the data section of the data table T2 is read.
That is, the number of storage blocks N, the number of processing end blocks M,
In addition, the head address of the storage area in which the block is stored is read.

In step S51, it is determined whether or not processing of all blocks stored in the storage area has been completed. This determination is made based on whether or not the number N of storage blocks and the number M of processing end blocks are the same. If it is determined that there is a block for which processing has not been completed, step S52 is performed.
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, for example, compression processing. The blocks for which processing has been completed are 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 processing end blocks is incremented. In step S55, parameters B and b2
Is determined to be the same value. If the values are the same, step S5
The program proceeds to 6, where "1" is set in the parameter b2, and the procedure proceeds to step S51. If the parameters B and b2 are not the same value, 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 judgment in the step S51 is negative, the process advances to a step S58 to judge whether or not the processing of the last block is completed. If not the last block,
The process proceeds to step S48 to wait for the next divided transfer start signal.

By the above processing, the system memory 9
The block data stored alternately in the two storage areas is alternately processed by the processing execution unit 10. If it is determined that the processing of the last block has been completed, and if the result of the determination in step S58 is affirmative, the flow advances to step S59 to return the return address determined by the return destination start address in the system memory 9 whose address is indicated by the processing command T1. Return the processed data first. That is, the processed data stored in the processing device memory 23 is
The data is returned to a predetermined return destination in the system memory 9 via the bus switching device 40 and the interface 20. In step S60, the number of data to be returned is set in the processing command. In step S61, the command ending means 37 indicating the end of the command processing is set.

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

In step S63, "1" is set to a parameter n indicating the number of lines. In step S64, n
The data of the line is read and data of the size X of the line is processed. In the step S65, it is determined whether or not the processing of all the lines of the font data has been completed. This determination 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 of 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 the present embodiment, when the type of data is “type 1”, two storage areas are provided, and blocks transferred from the general-purpose computer 12 are stored in the storage area specified by the parameter b1. Was transferred alternately. Then, in the processing execution unit 10, the parameter b
The block is alternately read from the storage area designated in step 2 to execute the scheduled data processing. As can be understood from the flowchart, when two or more storage areas are reserved, the storage areas can be sequentially specified by the parameters 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 a timing chart. FIG. 8 is a timing chart in the case where 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 processing execution unit 10 is in a start waiting state until the start unit 35 and the restart unit 36 are set, that is, until the start signal s1 and the divided transfer start signal s2 are turned on.
When the transfer of the first block (one block data) is completed by the processing between the CPU 2 and the communication device 8,
The start signal s1 and the split transfer start signal s2 rise, and the start means 35 and the restart means 36 are set.
After confirming the setting of the start unit 35 and the restart unit 36, the process execution unit 10 starts processing of one block at timing t1, and resets the restart unit 36. Starting means 35
After the setting is confirmed, the processing 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 (two-block data) is completed, the divided transfer start signal s2 rises again, and the resuming means 36 is set. The processing execution unit 10
After confirming that the restart means 36 has been set, the processing of two blocks is started at timing t2, and the restart 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 interruption. Hereinafter, similarly, the processing is executed by the processing execution unit 10 while alternately storing the four blocks in the two storage areas. The storage end status is initially set to “transferring”, and when four blocks are transferred to the storage area, “transfer end” is set.

FIG. 9 shows that 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, after one block data is transferred to one storage area, the start signal s1 and the divided transfer start signal s2 rise, so that the processing execution unit 10 starts processing one block at timing t1. On the other hand, since the transfer time is shorter than the processing time in the processing execution unit 10, after the two block data is transferred to the second storage area, the block cannot be transferred to the storage area continuously, and
U2 enters a wait state (waiting for interrupt) for a block end notification sent from the processing execution unit 10. When the processing of one block is completed by the processing execution unit 10 and the completion of the block is notified by interruption, three blocks are fetched into the first storage area, and the processing of two blocks is started at timing t2. After that, similarly, after the block is fetched, the next block is fetched into the storage area after waiting for an interrupt from the processing execution unit 10, and the processing of the block is executed up to the last block.

Next, the main functions of the data processing apparatus that performs the above operation will be described. FIG. 1 is a main block diagram of the data processing device. In the figure, the storage area 110a is:
It comprises at least two storage areas for storing blocks requested to be processed by the general-purpose computer 12. On the other hand, the page memory 110b is a storage area for developing 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 taking a block 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, and the like from the print data supplied from the input device 130, and expands 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 transmitted to 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 stores an address for designating a plurality of storage areas of the storage area 110a alternately or sequentially. Supply to area 110a. When a block is transferred to a specified address of the storage area 110a, the block data table 160 is written with the head address of the storage area 110a to which the block has been transferred and the number N of storage blocks. Further, when the detection signal b is input, the font data creation unit 120 outputs the address, font size, offset, and the like of the font data 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 and designates a plurality of storage areas of the storage area 110a alternately or sequentially. Read the block. Further, the data processing control unit 150 outputs the detection signal b
Is input, the read address is supplied to the page memory 110b, and the font data is output to the font processing unit 200 line by line. The block processing unit 170 and the font processing unit 200 execute processing such as compression and decompression on the read block and font data.
When the scheduled data processing is completed, the data processing control unit 150 notifies the end of the processing, and the block data table 160
Is incremented.

The transfer control unit 100 determines the data processing state of the storage area 110a based on the number N of storage blocks and the number M of processing end blocks in 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 number N of storage blocks and the number M of processing end blocks in the block data table 160. Then, the presence or absence of unprocessed data is determined based on the data processing state, and if there is no unprocessed block, the block processing unit 170 is set to a waiting state. The processed block or font data is stored in the storage unit 1
80, and is returned to a return destination (not shown) after all processing of a series of blocks or font data is completed.

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

Also, the type of data to be processed is determined. If the number of divided blocks increases due to the nature of the data and the processing becomes complicated, the data type and the data type are not divided. Added a table that describes information such as size. Then, the processing execution unit 10 can efficiently perform data processing with reference to this table.

In the present embodiment, the timing of transfer to the storage area and the timing of reading 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 stored flag or a processed flag may be provided for each storage area, and the data state of the storage area may be determined based on the flag. If not many storage areas are provided, it is more convenient to make a determination based on the stored flag or the processed flag.

[0058]

As is apparent from the above description, according to the first and second aspects of the present invention, it is possible to determine whether or not a processing target is suitable for processing in block units. Then, data processing can be executed by selecting an optimum transfer mode according to the determined type of the processing target.

In particular, according to the second aspect of the present invention, when it is recognized from the result of the determination that the processing target is block data supplied from outside, at least two blocks for storing the data are stored in the system memory. 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,
The data is stored in the storage area for each block, and thereafter, the data is sequentially transferred to the data execution means for processing. On the other hand, when the processing target is the font data, the data can be transferred from the page memory in the system memory to the data processing executing means and processed.

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

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a main function of a data processing apparatus according to an embodiment of the present invention.

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

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

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

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

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

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

FIG. 8 is a timing chart of transfer processing and data processing when the transfer processing 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 font positions on a system memory.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Data processing apparatus, 8 ... Communication apparatus, 10 ... Processing 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)

(57) [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 executing means for processing the block data and font data; and detecting a type of a processing target based on an instruction input from an external device and an internally generated instruction to generate a block detection signal and a font detection signal, respectively. Instruction determination means for outputting, transfer control means for outputting a transfer permission to an external device according to the block detection signal, sequentially transferring the block data to the storage area, confirming the transfer of the block data, and outputting a processing start instruction; 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 a system memory for expanding font data; data processing execution means for processing the block data and font data; transferability information of block data to each of the block storage areas; and each of the block storage areas Block data information registration means for registering unprocessed block data presence / absence information in the memory; font data information registration means for registering information relating to font data developed in the page memory; and instructions and internal information inputted from the external device. Instructions generated in Instruction discriminating means for detecting the type of the processing target based on the block detection signal and outputting the block detection signal and the font detection signal, respectively; Transfer control for outputting a transfer permission to the external device based on the transfer permission / inhibition information, sequentially transferring block data to each of the block storage areas, and outputting a processing start instruction every time block data is transferred. Means for outputting a block data processing command to a data processing execution means based on the unprocessed block data presence / absence information and the processing start signal in accordance with the block detection signal, and each time the processing of each block data ends, the transfer control means While outputting a processing end signal in accordance with the font detection signal. A data processing control means for outputting a font data processing command to the data processing execution means.