JPH02188063A - Data transfer device for character code - Google Patents

Abstract

PURPOSE:To send a document without being restricted by the document quantity by developing image data on a KANJI (Chinese character) character generating ROM while reading JIS codes of a document file, byte by byte, and sending out a print output to a facsimile device through a RAM and a transmission part. CONSTITUTION:A central control part 2 accesses a disk 3 to develop the image data by using the KANJI character generating ROM 4 while reading the JIS codes of the document file on the disk, byte by byte. The developed image data are stored temporarily on the RAM 5 by data of one line (24 lines for a 24X24-dot pattern) as the print output. The stored data are sent to the facsimile device 9, byte by byte, in order through an output part 6 as a parallel port. Consequently, the time for the generation of an image file is eliminated, so the total time from word processor document creation to facsimile transmission is shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a character code data transfer device for transferring text data from a personal computer to a facsimile.

B9 Summary of the Invention The first invention reduces the disk capacity by converting the JIS code of the text file into image data while transferring it to the facsimile when text data created by a personal computer is transferred to the facsimile. This shortens the access time.

The second invention is a central control unit (
In addition to the host CPU), the local control unit (local CPU
) is provided via a two-port RAM, and the processing time is shortened by having the local CPU perform image conversion and facsimile transmission.

A third invention further includes a DMA controller in addition to the second invention, character code image conversion is performed by a local CPU, and data transfer to a facsimile is performed by the DMA controller, thereby increasing the facsimile transfer speed and improving the telephone line. This improves usage efficiency.

C9 Prior Art When a personal computer and a facsimile are connected and a text created by the personal computer's word processor software is sent by facsimile, the procedure shown in FIG. 8 is used. That is, in step I, text data is created using word processor software.

Note that this text data is composed of shift JIS codes. In step 2, the created text data is printed using a word processor's print command. At this time, a printer emulator is used to convert the image, and in step 3, the converted print image is stored on the disk as an image file. In step 4, the data of the image file created in step 3 is transmitted byte by byte to the facsimile by the transmission control program. In step 5,
A facsimile is sent to the other party's facsimile through a telephone line.

D1 Problems to be Solved by the Invention As in the above procedure, instead of printing the printout of a text created using commercially available word processor software on a printer emulator, an image file is created and the data of this image file is sent byte by byte to a facsimile machine. You can transfer texts by sending them to .

However, with this type of conventional method, the dot image of the characters can be directly sent to the facsimile machine, so the facsimile transmission is clearer and has less deterioration than a facsimile read from a scanner, but as shown in step 3, it is necessary to create an image file, so the requires empty space. The disk capacity required for this purpose is 500 bytes if an image file is made from an A4 size paper, and a floppy disk can only hold data for two A4 size sheets. This means that if a personal computer has only a floppy system, the facsimile transmission of a file created using a commercially available word processor is limited to two A4 size sheets. Also, when sending data by facsimile,
This method has the problem that 500 bytes of disk access are required to send an A4 sheet, and the transfer speed slows down by the access time.

Therefore, an object of the present invention is to provide a data transfer device that is not limited by the amount of text to be transmitted and can transmit data at high speed.

E. Means and Effects for Solving the Problem The first invention is for facsimile transmission of text data from a personal computer, and includes a kanji character generation ROM that converts the JIS code of text files into image data while importing them, and a printout. The personal computer is provided with a RAM that stores data for the following minutes, and a sending unit that sequentially sends the data stored in the RAM to a facsimile.

The central control section of the personal computer takes in the JIS code of the text file on the disk one byte at a time, develops it into image data in the Kanji character generation ROM, and sends the printed output to the facsimile through the RAM and the sending section.

The second invention is configured by providing a local CPU to the host CPU via a 2-port RAM.

The host CPU has access to the disk and 2 ports R.
The data is set in the AM, and the local CPU takes out the data in the 2-port RAM, converts it into an image using the Kanji character generation ROM, and sends it to the facsimile.

In a third invention, a DMA controller is further connected to the local CPU, the local CPU controls conversion into image data, and the DMA controller takes print output from the RAM and controls transfer to a facsimile.

F. Embodiment FIG. 1 is an embodiment showing the first invention. 1 is a personal computer, and a central control section 2. Disc 3. It has a kanji character generation ROM 4, a RAM 5 in which data for print output is stored, and an output section 6 consisting of a parallel board.

Disk 3 stores sentences created using word processor software. 9 is a facsimile.

Figure 2 shows the operation timing, and the central control unit 2
First, the system accesses the disk 3, takes in the JTS code of the text file on the disk one byte at a time, and develops it into image data using the Kanji character generator ROM 4.

The expanded image data is printed out as one line (
In the case of a 24×24 dot pattern, each piece of data (24 lines) is temporarily stored in the RAM 5. The stored data is further transmitted one byte at a time to the facsimile 9 via the output unit 6 which is a parallel port. At time t, the disk 3 is accessed for the second time, and the central control unit 2 performs all data processing in the same manner.

Therefore, according to this embodiment, although the load on the central control unit 2 increases, there is no time to create an image file, so the total time from word processing document creation to facsimile transmission is shortened, and in particular, disk capacity is not an issue at all. This has the effect of allowing any number of facsimile sheets to be sent. In addition, conventionally, it required 500 bytes of disk access to send one A4 size sheet, but according to this embodiment, since only the text file is accessed, the amount of disk access is significantly reduced to about 1748. The speed increases by the access time.

FIG. 3 shows an embodiment corresponding to the second invention, in which a 2-port RA
A local CPU is provided via M.

In other words, in the same figure! 2 is the host CPU.

13 is a disk, 14 is a kanji character generator R
OM, 16 is an output unit (parallel boat), 17 is a 2-port RAM, and the boat on the -blade side is connected to the host CPU 2 side. 18 is local CPU, 2 port RAM
A personal computer is configured by being connected to the port on the other side of 17.

Since the facsimile 9 compresses data and transfers it, it uses a so-called flow control method without any flow control, so there are severe time constraints when transmitting image data.

In such devices, the host CPU of the personal computer directly retrieves text data from the disk,
If you convert it to image data and send it to a facsimile,
When transmitting highly compressed data such as pure white or pure black, a facsimile compresses the data and sends it to the telephone line.
At this time, facsimile errors may occur.

In other words, the time constraint for facsimile is the time between data sent to the telephone line, so when sending highly compressed data, if there are many data types sent from the personal computer to the facsimile, the computer will not be able to process it in time, resulting in facsimile errors. It becomes.

Therefore, this embodiment is designed to enable faster data processing.

Figure 4 shows the host CPU 12 and local CPU shown in Figure 3.
This shows the processing timing relationship with U18. First, the host CPU 12 accesses the disk 13, retrieves data from the text file in the disk 13, and sets the data in 2 ports I'(/', M17.Data set The rear host CPU 12 accesses the disk 13 for the second time and sets data in the 2-port RAM 17. This process is repeated in the same manner.

On the other hand, the local CPU 18 takes in the first data set in the two-board RAM 17 while the host CPU is accessing the disk for the second time, converts it into an image using the Kanji character generation ROM 14, and sends it to the output section. 16 to the facsimile 9. Similarly, while the host CPU 12 is accessing the disk, the previously set data is transferred to the 2-port RA.
The data is taken in from M, 17, converted into image data, and sequentially transmitted to facsimile 9.

Therefore, according to this embodiment, the processing time is approximately twice as fast as the embodiment shown in FIG. 1, and there is no possibility of facsimile errors occurring. Furthermore, since the processing time is shortened, the usage time of the facsimile telephone line is shortened, and the usage efficiency of the telephone line is improved.

The capacity of the two-port RAM 17 used may be such that it can take in all of one text file, but it is preferably small enough to hold several banks of one-sector capacity buffers on the disk 13. In this case, the host CPU 12
．． The local CP018 uses a buffer control register and uses a method of sequentially setting and extracting text data. That is, local CPU image conversion.

To match the facsimile transmission speed, while the local CPU is processing a buffer with a capacity of 1 sector, the host CPU
U sets data in another buffer. When the local CPU finishes processing one bank, it processes the next bank, and the host CPU sets the next text data in the processed bank of the local CPU.

FIG. 5 shows an embodiment corresponding to the third invention, which further includes a DMA
A controller is added to achieve higher processing speed.

In the figure, 22 is a host CPU, 23 is a disk,
24 is a Kanji character generation ROM, 25 is a RAM for storing printed output, 26 is an output section, 27 is a 2-baud RAM, 28 is a local CPU, and 29 is a DMA controller.

In order to process text data at high speed and send it to facsimile,
If the host CPU is in charge of disk access and the local CPU is in charge of character code image development and data transfer to the facsimile, if you try to send a facsimile with the exact same image as the printout of a text file from a commercially available word processor, the characters will be Character spacing, line spacing, and top margin processing when developing code images.

Left margin processing, TAB processing, ruled line joining processing, etc. are required. Therefore, in the local CPU, J
In addition to the process of converting IS code to image data, these special processes must be performed, so local C
The load on the PU becomes extremely large. Other local CPU
Since the image data must be further transmitted to the facsimile, the load increases, and the more sophisticated the image conversion process, the further the load increases and there is a risk that the transmission to the facsimile will not be in time.

Therefore, in this embodiment, a DMA controller 29 is provided,
It is used for facsimile transmission.

Figure 6 shows local CPU 2 transmitting one line of facsimile.
8 and DMA controller 29 to send data to the facsimile.

The host CPU 22 uses the 2-port RAM 2 from the disk 23.
The timing for setting data to 4 is the same as that shown in FIG.
9 will do it. Word processor text files are JIS
This is a code string, which is converted into image data by the local CPU 2B, but the amount of data of this text file is undefined, and the amount of data for one line of image-converted data is fixed.

When image data is sent by facsimile, it is sent line by line, but when the DMA controller 29 sends the data to the facsimile 9, the local CPU 28 sets the start address of the data converted to an image and the DMA start bit in the DMA controller 29. if,
After that, the DMA controller 29 transmits data for one line.

Figure 7 shows the local CPtJ28 and DMA controller 2.
9 shows the timing of the right to use the internal bus, A is the kanji character generation ROM2 of the local CPU.
4, B is the internal processing of the local CPU itself,
C is a facsimile transmission process of the DMA controller 29.

When image processing and facsimile transmission are separated in this way, while the local CPO 28 is performing internal processing B in image conversion processing, the DMA controller 29 can take over the bus and send data C to the facsimile 9, reducing the load on the local CPU. This improves bus usage efficiency and speeds up data transfer. When the data transfer for 1972 minutes is completed, the DMA controller 29 generates a termination interrupt to the local CPU 2B. During this interrupt processing, the address of the next image data to be sent is set and D
The start bit of the MA controller is set to end the interrupt processing.

G1 Effects of the Invention According to the present invention, there is no need to create an image file, so facsimile transmission can be performed directly from a personal computer without being limited by the amount of data to be sent.
Moreover, it can be transferred at high speed.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing an embodiment of the first invention of the present invention, and FIG.
The figure is a timing diagram of data transmission to a facsimile machine for explaining the same as above, FIG. 3 is a configuration diagram showing an embodiment of the second invention of the present invention, and FIG. 4 is a timing diagram of data transmission to a facsimile machine for explaining the same as above. , FIG. 5 is a configuration diagram showing an embodiment of the third invention of the present invention, FIG. 6 is a timing chart of transmission to a facsimile for explaining the same, and FIG. 7 is a data transmission of one line of the same to a facsimile. The timing diagram in FIG. 8 is a procedure diagram for facsimile transmission using a conventional personal computer. 1.10.20...Personal computer, 212
．． 22...Host CPU, 3,13.23...Disk, 4,14.24...Kanji character generation ROM, 17.27...2 point RAM, 1828
...Local CPU, 29...DMA controller.

Claims (3)

[Claims] (1) In a device that transmits text data from a personal computer by facsimile, a kanji character generation ROM that captures the JIS code of text files in the personal computer and converts it into image data, and a RAM that stores data for print output. ,
A character code data transfer device characterized in that a personal computer is provided with a sending unit that sequentially sends the data stored in the RAM to the facsimile machine. (2) A local control section is provided in addition to the central control section of the personal computer, and a 2-port RAM is provided between the local control section and the central control section. 2. The character code data transfer device according to claim 1, wherein the data is taken out from the port RAM, converted into an image, and sent to a facsimile. (3) Print output data storage RAM on the local control unit side
3. The character code data transfer device according to claim 2, further comprising a DMA controller for controlling data transfer in the sending section.