JPH0756677B2 - Image processing device - Google Patents

Description

The present invention relates to an image processing device.

2. Description of the Related Art Copiers that reproduce original images are widely used. However, in this type of copying apparatus, the same image as the original is simply duplicated. Copy or reduce the original image,
Only image processing such as changing the image density is possible. Further, by reading the original image as an electric signal and electrically processing the image information converted into the electric signal, in addition to the function described above, a plurality of images for extracting and duplicating a part of the original can be obtained. There has been proposed an image processing apparatus capable of performing image processing such as combining or changing the image density of only a part of a document. However, as this type of image processing apparatus has many functions, the apparatus becomes complicated and the users are limited to those who are accustomed to the apparatus. In addition, the image processing time is too long, which is inconvenient for the user.

In view of the above points, an object of the present invention is to provide an image processing apparatus capable of performing image processing at high speed by a simple operation. More specifically, the original image is photoelectrically converted and a read image signal is output. Reading means (1, 12-7, 12-5 shown in FIG. 9)
A designation means for designating a desired area on the image, and a temporary storage means for storing the image signal output from the reading means according to a write address and outputting the stored image signal on a read bus line according to a read address. (17th
2-2, 2-3, 2-4) shown in the figure, an image file means (FIG. 9) for storing a plurality of pages of image signals output from the temporary storage means to the bus line, and the temporary storage means. , Control means for controlling the image file means (FIG. 12-1)
A DMA means (FIG. 9) for DMA-transferring an image signal from the temporary storage means to the image file means via the bus line; and a supply of the write address and the read address to the temporary storage means. Means (Fig. 18 2-
1-9, 2-1-20), and the supplying means supplies the write address in synchronization with the reading operation of the original image by the reading means, and temporarily supplies the image signal from the reading means. An image signal for one page is stored in the storage means, and the control means adjusts the size of the area so as to extract the desired area designated by the designating means within the one page stored in the temporary storage means. Corresponding number of times DMA transfer data is set in the DMA transfer means, DMA transfer operation by the DMA transfer means is performed, image signal of the desired area is read out from the temporary storage means, and DMA transferred to the image file means. An image processing device is provided.

FIG. 1-1 shows the configuration of an embodiment of the image processing apparatus according to the present invention. Reference numeral 1 is a reader unit having a line sensor such as a CCD for photoelectrically reading a document image, and 2 is a document of a predetermined size, which is serially output from the reader unit 1 and is converted into an electric signal image information of the document. A buffer memory 3 composed of a semiconductor dynamic memory for storing the minute as a unit, a printer unit 3 composed of a laser beam printer for forming an image on a recording material such as paper according to image information stored in the buffer memory 2 and serially outputted, The disk memory stores all or part of the image information stored in the page memory 2, and the image information is also transferred from the disk memory 4 to the buffer memory 2. The disk memory 4 also stores image processing information. Reference numeral 5 denotes an image processing unit for performing image processing on the image information output from the reader unit 1, the image information stored in the buffer memory 2 and the image information stored in the disk memory 4, and 6 denotes an image processing unit for the user to perform image processing on the image processing unit 5. Digitizer for inputting processing information for, digitizer 6
Is a CRT for displaying the processing information input by, and allowing the user to easily input or modify the processing information interactively, and 9 is a DMA controller for controlling the DMA transfer of the image information. The buffer memory 2, the disk memory 4, and the image processing unit 5 are collectively referred to as an image processing control unit 12.
A perspective view of the apparatus of the embodiment is shown in FIG. 1-2. An image processing unit 10 is composed of a buffer memory 2, a disk memory 4, an image processing control unit 12 having an image processing unit 5, a reader unit 1 and a printer unit 3, and 11 is composed of a digitizer 6 and a CRT 7. This is an image processing information forming unit.

FIG. 2 shows a perspective view of the digitizer 6.

6 is a digitizer body, 8 is a stylus pen, and when the stylus pen 8 points on the digitizer 6, the coordinate information of the point pointed on the digitizer 6 is sent to the image processing unit 5, and the image processing unit 5 uses the coordinates. The image processing information corresponding to the information is recognized. An area 6-1 of the digitizer 6 is an input section provided for inputting an alphanumeric character, a number and a character string command group, and a shaded area 6-2 is a paper placing position on which an original or a recording material is placed. .

FIG. 3 shows a detailed view of the surface of the digitizer 6. In this embodiment, for simplicity of description, the case of using an A4 size document and recording material will be described. Paper loading position 6 shown with diagonal lines
-2 corresponds to A4 size, and the paper is a loading standard 6-3
Place according to. As a result, the sheet mounting position 6-2 on the digitizer 6 and the image information stored in the buffer memory 2 have a one-to-one correspondence. For example, when it is desired to extract a part of the original image stored in the buffer memory 2, the extraction position can be designated by placing the original on the original digitizer 6 and actually indicating the position on the original with the stylus pen 8. . As described above, the input section 6-1 is provided with a group of numbers, alphanumeric characters and character string commands divided into areas as shown in the figure. For example, to input “D”, use the stylus pen 8 to enter “D”.
By designating the part surrounded by.

Figure 4 shows the screen configuration of CRT7.

In this embodiment, the CRT7 is a NEC 12-inch color TV (JC
-1202DH). Area 7-1 on the screen shows the input image area corresponding to A4 size, the background color is white and digitizer 6
The area 7-4 designated by is displayed in green. Area 7-2
Indicates an output image area corresponding to A4 size, the ground color is blue, and the area 7-5 designated by the digitizer 6 is red. Area 7-3 is an application buffer for displaying the processing information input from the digitizer 6, and area 7-
6 is a text buffer for displaying the completed application.

The operation method of the image processing apparatus of this embodiment will be described below. The outline of the operation of the present apparatus is that the reader unit 1 performs desired image processing on the read image information and outputs it by the printer unit 3. Here, the processing information for the image processing is stored in the disk memory 4 as a preliminary program while interacting with the area 7-3 of the CRT 7 by the digitizer 6, and the image processing is performed according to the stored processing information. A program for this image processing is defined as an application file. Further, a plurality of application files can be stored in the image processing section 5, and each application file can be stored in a two-digit number or a six-character alphabet, or a combination of numbers and blanks. File name is given by.

On the other hand, the image information transferred and stored from the buffer memory 2 to the disk memory 4 according to the processing information is defined as an image file. Since the disk memory 4 stores a plurality of image files, each image file is also given a file name in two ways such as a two-digit number or a six-character alphabet, and a combination of numbers and blanks. Incidentally, it is possible to instruct whether these two types of files can be erased or not at the time of storage. In other words, when "W" is input, deletion is added. When "@" is input, deletion is possible.

Next, the definition of the command for image processing input from the digitizer 6 will be shown. The command type is shown in FIG.
a is a command character and b is a parameter. The command is fixed by a parameter consisting of one command character (alphabet), a number in parentheses, a alphabet and a blank as shown in the figure. However, parameter b
May not be necessary depending on the command.

The types of parameters will be described below.

[Parameters related to image quality]

Regarding the image quality, halftone designation and edge enhancement image processing can be performed. When halftone is specified, dither processing is performed at the time of reading the original, but eight types of this dither pattern are provided and the numbers "1", "2" ... "8" must be input with the input section 6-1 of the digitizer 6. To fix the halftone density. If you do not specify halftone, enter @. For edge enhancement, digitizer 6
Input "E" in the input section 6-1 of the above, otherwise enter "@".

[Parameters regarding coordinates]

There are two parameters of the position and the size for the coordinates indicating the extraction position and the movement position of the image. Input of these parameters is carried out at the paper loading position 6-2 of the digitizer 6.
The desired position of the CRT7 is input by indicating it with the stylus pen 8, and as described above, the area is displayed in a color different from the ground color on the CRT7, and at the same time, a specific three-digit number is displayed in the area 7-3 of the CRT7. Is displayed in mm (unit: mm). The position parameter indicates the reference coordinate (X coordinate Y coordinate) of the desired position, and the size parameter indicates the length in the X and Y directions from the reference coordinate.

"Parameters Related to Transfer to Buffer Memory 2" As described above, the image information of the original document and the image information from the disk memory 4 are input to the buffer memory 2 from the reader unit. If these pieces of image information are combined, "" is input on the digitizer 6, and if not, "@" is defined.

The types of one-character commands will be described below. These are input by pointing each character in the input section of the area 6-1 of the digitizer 6 with a stylus pen.

M ... Clear buffer memory 2 F ... Clear image file R ... Read original P ... Printer output L ... Load image file into page memory 2 S ... Store image information in buffer memory 2 to disk memory E E ... Application Run the file Y W ... Suspend the application file that is running Q ... Stop the application file that is running A ... Change the write protect setting of the image file B ... Change the write protect setting of the application file T ... Application The file is transferred from the image processing unit and displayed on the text buffer. Next, the types of character string commands will be described.

"APC transfer" ... Transfers the processing information of the application buffer in the area 7-3 of the CRT 7 to the image processing unit 5 and stores it.

"TEX transfer" ... Image processing unit 5 displays the contents of the text buffer.
Transfer to.

"EDIT" ... Move the cursor on CRT7 to the application buffer in area 7-3.

"EXIT" ... "EDIT", "TRACE", "POSITION", "SIZ"
Release of "E".

“TRACE”… Displays the contents of the application file on the CRT7.

“ENTER”… Transfers the contents of the text buffer to the application buffer.

“DELETE”… Deletes the character on the cursor.

“CLR LINE”… Clear area 7-3 of CRT7.

"←" ... Move the cursor one position to the left.

"→" ... Move the cursor one position to the right.

"Clear screen" ... Clear areas 7-1 and 7-2 of CRT7.

"POSITION" ... Position input specification.

“SIZE” ... Size input designation An example of image processing using the above parameters, the one-character command and the character string command will be described with reference to FIG. This image processing is performed in the area n1 of the first document shown in FIG.
Image information of the area n2 of the second original shown is extracted and rearranged as shown by C to create a list. (The file name of the application file programmed with this image processing is 01.) The procedure for creating the application file will be described below.

The first document a is placed on the sheet placement position 6-2 of the digitizer 6.
Place on.

Instruct "0" and "1". ... the name of the application file
01.

Instruct "R". The original is read and stored in the buffer memory 2.

... "S", "(", "0", "1" are designated .... ... The image information of the n1 area extracted from the original a is stored in the disk memory 4 as the image file of the file name 01.

")" ... Parameter input for image file 01 completed.

The original a is removed from the paper placing position 6-2 of the digitizer 6 and the original b is placed.

“R” ... Reads the original and stores it in the buffer memory 2.

“S” “(” “0” “2” ... Image information of the n2 area extracted from the document b is stored in the disk memory 4 as an image file of the file name 02.

")" ... Parameter input for image file 02 is complete.

The document b is removed from the paper loading position 6-2 of the digitizer 6 and the recording material C is loaded.

“L” “(” “0” “3” ... Image file with file name 03 (content is 0) is stored in the buffer memory 2.

“@” “)” ... Image information of file name 03 is stored in place of the image information already stored in the buffer memory 1.

"L""(""0""1" ... Load the image file with the file name 01 into the buffer memory 2.

“” ... Overlaid on the image information already stored in the buffer memory 2 and stored.

")" ... Parameter input completed.

"L""(""0""2" ... Load the image file of file name 02 into the buffer memory 2.

“0” ... Stored on the image information already stored in the buffer memory 2.

")" ... Parameter input completed.

"P""(""5"")" ... Set the number of prints to 5.

"APC transfer" ... Transfers the application file formed as described above to the image processing unit 5. Stored in disk memory 4.

The above processing information is formed by pointing the digitizer 6 with the stylus pen 8. That is, it is possible to input on the same digitizer 6 the instruction for extracting a desired image and the position for image composition and the command information for reading the image and performing the image processing. Therefore, the image processing information can be easily formed by the same means. The image information formed as described above is displayed on the application buffer 7-3 of the CRT 7. This is shown in FIG. At the position indicated by the rectangle in FIG. 7, the coordinate information input by indicating the sheet placement position 6-2 on the digitizer 6 with the stylus pen 8 is a three-digit number in each of the X and Y directions. It is displayed in (unit mm).
For example, if the point A of the manuscript a in FIG. 6 is at a position with an X coordinate of 98 mm and a Y coordinate of 63 mm, and the point B is from the A coordinate with a distance of 23 mm in the X direction and 54 mm in the Y direction, the first line in FIG. ...... becomes.

Here, the operation of the apparatus by the application file with the file name 01 is summarized as follows.

First, the first original shown in FIG. 6A is read by the reader unit 1 and stored in the buffer memory 2, and the image information n1 from the stored image information is stored in the disk memory 4 with the file name 01. Store. Next, the second original shown in FIG. 6B is read by the reader unit 1 and stored in the buffer memory 2, and the image information n2 is stored in the disk memory 4 with the file name 02 in the disk memory 4. Store.
After that, the image file with the file name 03 is transferred from the disk memory 4 to the buffer memory 2 (in the above-mentioned image processing example, the image file with the file name 03 is a white image. Then, the image file with the file name 01 is transferred to the m1 area of the buffer memory 2 and the image file with the file name 02 is transferred to the m2 area of the buffer memory 2 and stored. As a result, one page of image information in which the image information n1 and n2 are arranged as shown in FIG. 6C is formed in the buffer memory 2. Then, all the contents in the buffer memory 2 are output to the printer unit 3, and the printer unit 3 records them on five recording materials. Further, the application file for the above image processing is stored in the disk memory 4 with the file name 01 by the "APC transfer" finally instructed by the digitizer 6.

When actually driving the image processing apparatus using the processing information (application file) stored in the disk memory 4 as described above, the driving start command is provided in the image processing unit 10 shown in FIG. 1-2. It is input from the operating unit 13 that is present. FIG. 8 shows a detailed view of the operation unit 13. 13-1 is a 2-digit display for displaying the application file name,
Reference numeral 13-2 is a number display for displaying a desired number of sheets to be printed by the printer unit 3, and 13-3 is a keyboard for setting a numerical value, which is used for setting a file name and a desired number of prints.
13-4 is an enter key for inputting a numerical value set on the keyboard 13-3, 13-5 is an exit key for starting the image processing, and 13-6 is a stop key for interrupting the image processing being executed. When the stop key 13-6 is pressed, the work in progress at that time is completed, and then the apparatus is put into the standby state. Reference numerals 13-7 to 13-12 are lamp groups for displaying the device status of the image processing unit 10, and 13-7 is an application file which is input from the keyboard 13-3 and displayed on the display 13-1. A lamp indicating that it is not stored in. A lamp 13-8 indicates a paper jam in the recording material supply system of the printer unit 3. 13
-9 is a lamp that indicates the occurrence of a paper jam of the document in the automatic document feeder that automatically conveys the document to the reader unit 1 and discharges it after reading, 13-10 is the printer unit A lamp indicating that the recording material of 3 is exhausted, 13
-11 is a lamp indicating the timing of replenishing the developer of the printer unit 3,
13-12 is a lamp indicating that the apparatus is not in the standby state, and when at least one of the above 5 lamps other than the lamp 13-11 is lit, the reader unit 1 and the printer unit 3 are activated. do not do. If one or more of the above five lamps are lit during the operation of the device, the device is stopped after completing the operation at that time.

Next, an operation example of performing image processing based on the application file stored as described above and stored in the disk memory 4 will be described. Incidentally, as an example, there is a case where the image processing of the application file having the file name 23 is performed to obtain five prints. Since the processing information regarding image processing is stored in the disk memory 4 as an application file, in this case, the application file with the file name 23 is called from the disk memory 4, transferred to the sequence RAM of the image processing section, and further printed as desired. It is only necessary to set the number of sheets 5 and set the document on the reader unit 1. In addition, this device is designed to give a user a key input procedure from the device side. That is, when inputting the file name of the application file, the application name display 13-1 blinks, and when the number of prints is input, the print number display 13-2 blinks, prompting the user to input. . The situation will be described below.

1. The display 13-1 showing the application file name is blinking "00".

2. The user presses the file name “2” or “3” on the keyboard 13-3.

3. Display 13-1 blinks "23".

4. The user presses the “ENTER” key 13-4.

5. The display 13-1 stops blinking and displays "23", and at the same time, the print number display 13-2 blinks with "00" displayed.

6. The user presses the number of prints “5” on the keyboard 13-3.

7. Display 13-2 blinks "5".

8. The user presses the “ENTER” key 13-4.

9. Display 13-2 stops blinking and displays "05".

6. Press the EXCUT key 13-5.

7. The device starts operating.

When image processing is performed using the application file already stored in the disk memory 4 as described above,
The image processing can be performed without the need of the image processing information forming unit constituted by the digitizer 6 and the CRT 7.

FIG. 9 shows a block diagram of the circuit of this embodiment.

1 is a reader unit, 3 is a printer unit, 6 is a digitizer, and 7 is
Reference numeral CRT, 12 is an image processing control unit mainly composed of the buffer memory 2, the disk memory 4, the image processing unit 5 and the DAM controller 9 shown in FIG.

A multi-bus 12-10 is provided in the image processing controller 12. Multibus 12-10 is generally a standard bus. The circuit block that can acquire the right to use this multibus 12-10 and control other circuit blocks is called the master function block, and the other one is called the slave function block. 4 circuit block, that is, CPU circuit block 12-1, DMA controller 9, buffer memory circuit block 12-3 equipped with semiconductor buffer memory, reader & printer sequence controller
Of 12-4, the CPU 12-1 and the DMA controller 9 are master function blocks, and the buffer memory circuit block 12-3 and the reader & printer sequence controller 12-4 are slave function blocks. The four circuit blocks are connected to the multibus 12-10 by multibus lines 12-12, 12-13, 12-14, 12-15, respectively. 12-16 to 12-20 are DMA controller 9, reader & printer sequence controller
12-4, dither controller 12-9, shift memory 12-
5. An interrupt line input from the buffer memory circuit block 12-3 to the CPU circuit block 12-1. 12-2
Reference numerals 1, 12-22 are image signal lines for transferring the image information photoelectrically converted by the two line sensors CCD 1, 2 of the reader section 1. Reference numeral 12-23 is a line from which the dither controller 12-9 outputs information regarding the dither of the image quality processing. 12
−24 and 12−25 perform A / D conversion of the image information obtained from the line sensors CCD1 and 2 according to a predetermined threshold when edge emphasis is specified, and dither controller 12 when halftone is specified. It is a line for transferring image information that has been A / D converted and image-quality processed by a signal from −9, and for transferring control information relating to these image quality processings. 12-26 is obtained by image signals in parallel with lines 12-24 and 12-25.
The image signal of the scanning line is transferred to the buffer memory circuit block 12
-3, and also contains its control information.
12-27 CPU 12-1 is a buffer memory circuit block 12-
3 is a refresh trigger signal line for the dynamic memory which is the buffer memory 2 in FIG. Since the buffer memory 2 has two banks 12-28, they are select signal lines of the banks. 12-29 is shift memory 12-
5 is a period signal line indicating a period during which image information is input to the buffer memory circuit block 12-3 from 5 and a period during which image information is output. 2-30 is a buffer memory circuit block
12-3 is a line for outputting one serial image information to the printer unit 3. Reference numeral 12-31 designates a video blank signal for causing the laser of the printer unit 3 to emit light in the non-image area in the case of the background ground scan, and a signal line for forcing the laser to emit light in order to obtain the horizontal synchronizing signal.
Reference numeral 12-32 is a signal line for determining the coordinate information for designating the area to be halftoned on the original and the type of design by the dither controller 12-9. 12-23 is digitizer 7
It is a line that transfers the above coordinate information to the CPU 12-1, and C
The file information in the disk memory 4 is sent from the PU 13-1 via this line to the CRT & digitizer controller 12-8.
Sent to. 12-34 is a line to which the coordinate information from the digitizer 6 is input. 12-35 is a video signal line output from the CRT & digitizer controller 12-8. 12-36 is a reader & printer sequence controller
It is a line of the input signal to be processed by the processor in 12-4 and the processed signal. The interface 12-6 converts the output signals of various sensors provided in the reader unit 1 and the printer unit 3 into a form that can be input to the reader & printer sequence controller 12-4, and drives the motor, heater, laser, etc. To output a signal. Reference numeral 12-37 is a signal line for driving the optical system scanning motor of the reader unit 1, and 12-38 is a sensor signal line in the reader 1. 12
Reference numeral -39 is a line for interacting with the user via the operation unit 13. 12-40 is a line for detecting the rotation of the scanner of the printer unit 3, 12-41 is a line for detecting the temperature of the laser for stabilizing the laser, 12-42 is a signal for driving the printer unit 3 and various sensors Signal line. The buffer memory circuit block 12-3 outputs two lines not connected to the multibus 12-10, that is, a line 12-26 for inputting serial image information from the reader unit 1 and a serial image information to the printer unit 2. Line 12-30 and multibus
It has a line 12-14 connected to 12-10 as an image information transfer line. As a result, the CPU 2-1 connected to the multi-bus 12-10 can execute operations related to image processing even while image information is being input from the reader unit 1 and being output to the printer unit 3. it can.

As described above, when performing image processing, prior to the actual driving of the image processing apparatus, processing information relating to image processing, that is, designation of an image processing area of a document, instruction of image processing content, printout area Formed by pointing the digitizer 6 with the stylus pen 8 while interacting with the CRT 7 to specify the file name of the image information to be stored in the image processing unit, and to specify the file name of the set of image processing information. Will be done. Therefore, the image processing apparatus can perform the image processing easily without requiring a complicated apparatus by a simple operation, and in that the information related to the image extraction position designation and the image processing can be formed by the common means. I will provide a. Further, since the semiconductor dynamic memory is used to store the image information for one page continuously output by the line sensor of the reader unit 1, the image information output from the reader unit 1 is stored. When inputting to the means,
It was possible to input directly without using a synchronization means such as an intermediate buffer. The same applies to the case of outputting to the printer unit 3, and the image information can be read into and read from the memory means at high speed.

The details of the CRT & digitizer controller circuit block 12-8 shown in FIG. 9 are shown in FIG. This block uses APPLE II from Apple Inc. Figure 10 shows APPLE
The circuit diagram of II is shown. Therefore, for details, see APPL
It is described in the E II Manual.

Details of the CPU circuit block 12-1 shown in FIG.
Shown in the figure. This block uses Intel's single board computer SBC 86/12, and Fig. 11 shows SBC
The circuit diagram of 86/12 is shown. So for more details
It is described in the SBC 86/12 manual.

The details of the reader & printer sequence controller circuit block 12-4 shown in FIG. 9 are shown in FIG. This block has Intel's single board computer SB
It uses C569, and Fig. 12 shows the circuit diagram of SBC569. Therefore, details are described in the SBC569 manual.

Details of the DMA controller circuit block 9 shown in FIG. 9 are shown in FIG. 9-1 is an Intel processor with built-in DMA function, Intel 8089, which is the main function of this circuit block. Details of the device itself can be found in the 8089 manual. 9-2 uses the bus arbiter 8289 according to the status information from the IO processor 9-1 to obtain the right to use the multibus 12-13 by combining with the multibus 12-13 and release the multibus 12-13 after use. It has such a function. Detailed functions are described in the Intel 8289 manual. 9-3 is a bus controller 82
88 is the bus arbiter 9-2, and after acquiring the right to use the multi-bus 12-13, outputs or inputs the address and data signals to the multi-bus 12-13, and outputs the memory line command MWTC.
And the memory read command is output. That is multibus
The block having the master function for 12-13 has the bus arbiter 9-2 and the bus controller 8288 so that the multibus 12-13 can be accessed. Therefore, the slave function block does not have these two devices and is unilaterally accessed by the multibus 12-13. Details of the bus controller 9-3 itself are described in the Intel 8288 manual. 9-4
Is a clock generator 8284, which uses an external oscillator as an input means and supplies a clock signal of a predetermined frequency to the IO processor 9-1, the bus arbiter 9-2, the bus controller 9-3, and to the IO processor 9-1. The peripheral circuit outputs a memory OR I / O acknowledge signal (response to a write or read from the memory or I / O) as judgment information for determining whether the bus cycle enters the wait state or for canceling the wait state. It has a function of receiving the signal and outputting the ready signal in accordance therewith. Details are described in the Intel 8284 manual. 9-5 is an internal bus in this circuit block, which is a multibus 12-
It becomes a local bus for 13. As for the bus structure, the address bus is 16 bits and has an address space of 64 KKBYTE,
The data bus is 8 bits. 9-6 is an address / data buffer. This block consists of two address / data buffers, one for the multi-bus 12-13 and the other for the internal bus 9-5.
As a basic function of the buffer 9-6, the address and data information output from the IO processor 9-1 is multiplexed and time-divided and output on the same line, that is, first the address information and then the data. Since the information is output, first, the address information is latched in the address buffer, and then, depending on whether the next data information is the read command or the write command, the transfer or the read of this data is switched. Therefore, regarding the former buffer, at the timing when the address latch enable ALE signal is output from the bus controller 9-3, the address / address is already output from the IO processor 9-1.
Since the address information is output to the data line, the address information is latched to the address buffer by the signal. After that, if the bus arbiter 9-2 has already acquired the usage right of the multibus, the bus arbiter 9-2 outputs an address enable AEN signal, and this signal causes
The address buffer outputs the latched address information to the multi-bus 12-13. If this is for a write command, the IC processor 9-1 will
After outputting the address information on the data line, if the multi-bus 12-13 has been acquired at that time, the data information is output. Along with this, the bus controller 9-3 outputs the data enable DEN signal, and outputs the data information together with the address information to the multi-bus 12-13 via the data buffer. The transmission or read switching signal at this time is output as DT / R from the bus controller 9-3, and accordingly, the data information is transferred to the multi-bus 12-13. Bus controller 9 for read command
-3 does not output the DEN signal, and the data buffer sets the DT / R in read mode to IO the data information on the multi-bus 12-13.
Place on the address / data line of processor 9-1.
The reading of this data by the IO processor 9-1 is performed after confirming the transfer acknowledge XACK signal from the accessed memory. Internal bus 9-
For the address / data buffer for 5, the address latch timing is the same as in the above case. That is, neither the address buffer for the multi-bus 12-13 nor the address buffer for the internal bus 9-5 is an IO processor 9.
The address information output from -1 is simultaneously latched regardless of which bus is accessed. However, the signal indicating whether or not to output only in the case of the multi-bus 12-13 is performed by the AEN signal from the bus arbiter 9-2. Next, whether or not to enable the output of the data buffer for the internal bus is determined by the peripheral data enable PDEN signal of the bus controller 9-3, and the direction switching between transmit and read is for the multibus 12-13. Bus controller 9-3 as well as data buffer
DT / R signal. Reference numeral 9-7 is a synchronizing signal generating circuit, which is used when the IO processor 9-1 accesses peripheral units (memory, I / O, etc.) in this block and confirms the response from these units. 9
-1 enters the next operation, and the clock generator 9-4 is configured to synchronize these response signals with the bus cycle of the IO processor 9-1.
-1 is sent as a ready signal. Reference numeral 9-8 is a ROM, which has two 2716 devices. Therefore, it has a capacity of 4 KBYTES and is a memory for storing the microprogram of the IO processor 9-1. 9-9 is a normal I / O port and uses two 8212 devices. The purpose is to control peripheral devices, but in the present embodiment, nothing is controlled and it is released. Reference numeral 9-10 is an address decoder which decodes a part (upper number bits) of the address information of the internal bus 9-5 in order to generate a chip selection signal for the ROM 9-8 and the I / O port 9-9. The disk memory 9-11 is a hard disk unit with a storage capacity of
10MBYTE, composition is 350 tracks, 1 track is 18 sectors,
One sector is 512 BYTE. It has a disk controller circuit inside and is designed to interface with an 8-bit data bus. The model name is WDS
For details on -10, refer to the manual of WDS-10 of Sword Computer. Reference numeral 9-12 is an address / data line of the IO processor 9-1, which outputs address information and data information on the same line in a time division manner. The output order is address first, then data. Reference numeral 9-13 is a signal line for address information and data information output to the internal bus 9-5. Reference numeral 9-14 is a signal line for address information and data information output to the multi-bus 12-13. 9-15 is an IO processor 9-1 to a bus arbiter 9-2 and a bus controller 9
-3 and a signal line for status information to be output to.
9-16 is a channel attention CA signal which is a DMA request signal from the CPU 12-1 and the IO processor 9-1 to the CPU 12-
System interrupt SIN to notify DMA completion to 1
TR signal. This SINTR signal is input to the interrupt terminal of the CPU 12-1. Line 9-17 is bus controller 9-3
Output to address / data buffer 9-6 based on status information from IO processor 9-1. Address latch enable ALE signal, peripheral data enable PDE.
These are N signal, data enable DEN signal and data transmit / read DT / R signal. In line 9-18, the bus arbiter 9-2 acquires the right to use the multi-bus 12-13 according to the status signal of the IO processor 9-1, and then multi-addresses the address information already latched to the address / data buffer 9-6. It is an address enable AEN signal which is a signal output to the bus 12-13. Lines 9-19 are signal lines for handle-shaking with respect to the usage right with the multibus 12-13. The master function circuit block connected to the multi-bus 12-13 has a predetermined priority of the bus use right in advance. In this embodiment, the CPU 12-1 has the highest priority, and the DMA controller 9 has the second priority. is there. First, when the bus arbiter 9-2 issues a bus request BREQ signal to the multi-bus 12-13, the CPU 12-
If 1 is not using multibus 12-13, a reply will be sent indicating that it is available as a bus priority in BPRN signal. When the bus arbiter 9-2 confirms this, it outputs a busy signal to inform that the bus is in use. The line 9-20 is an acknowledge XACK signal line which is a response signal from an external memory or I / O when the external memory or I / O is accessed through the multibus 12-13. Line 9-21 is the byte high enable BHEN signal which is output together with the address information when accessing the memory from the IO processor 9-1. When the byte information at an odd address is accessed (the data is output to the upper byte of the data bus. When 16-bit word information is accessed by addressing an even address (byte data at an even address is in the lower byte of the data bus, byte data at an odd address is in the upper byte of the data bus). This is for using as a switching signal which bank is to be accessed in a memory having a structure divided into an even bank and an odd bank depending on the output signal. Line 9-22
Is a clock signal, and lines 9-23 are two types of reset signals, a power-on reset and a manual reset. The line 9-24 is a ready signal synchronized with the bus cycle of the IO processor 9-1. Line 9-25 is multibus 12-13
Is a memory write command MWTC signal and a memory read command MRDC signal that are output together with address information and data information. The line 9-26 is the ALE signal from the bus controller 9-3 and the signal of S2 which is one of the status information. As described above, the address information of the S2 signal is latched to the multi-bus address buffer and the internal bus address buffer at the same time regardless of which buffer is accessed. It is necessary to judge whether the content latched in the far is the address information for the internal bus. Therefore, the determination is made in the address decoder 9-10 based on the S2 signal. That is, the S2 signal is this identification information. If S2 = 1, the multi-bus 12-13, if S2 = 0, the internal bus 9-
5, this signal is latched and held by the ALE signal. Line 9-27 uses IO processor 9-1 as internal bus 9-
I / O read command IOR output from bus controller 9-3 when data is accessed in read mode
These are an interrupt acknowledge INTA signal and an ALE signal output from the bus controller 9-3 when the C signal and the microprogram from the ROM 9-8 are fetched. In the synchronizing signal generating circuit 9-7, when the IO processor 9-1 accesses the internal bus 9-5 by the IORC signal and the INTA signal, a signal for identifying the read mode is produced. The ALE signal is used for the clock in the synchronizing signal generating circuit 9-7. The line 9-28 is a data bus, and the command information, the result information, and the data information of the information to be carried on the data bus have one address, and the other one address has the status information. The former three pieces of information are distinguished by the disk unit 9-11 by being input / output sequentially. Lines 9-29 are the above two address information lines. Line 9-30 is a command busy CBUSY signal which is an identification signal for the above two addresses. In addition, the signal of line 9-30 and the line 9
The reason for inputting the -27 signal is the disk unit 9-11.
In the read mode and the write mode for a set of command information, result information and data information, the timing when data becomes ready differs, and the timing when the data becomes ready also differs between read mode and write mode for status information. This is because it is necessary to create four types of wait time given to the IO processor 9-1. Line 9-31 is the ready signal described above. Line 9-32 is Disk Unit 9
-11: Data request DREQ signal and DM indicating ready status
External termination EXT signal indicating A completion. The line 9-33 is the data bus line (8 bits) of the I / O port 9-9. The line 9-34 is loaded with the upper several bits of the address information for making the chip select signal of the ROM 9-8 and the I / O. The line 9-35 is address information indicating a specific address in the ROM 9-8, and the lower bits other than the above are carried.
Line 9-36 is a data signal line of the instruction code fetched from ROM 9-8 and is output on the data bus. Line 9-37 is the chip select signal for I / O port 9-9, and line 9-38 is the chip select signal for ROM 9-8.

Based on the above description, the flow of information during DMA in FIG. 13 will be described.

The CPU 12-1 passes the line 9-16 to the IO processor 9
Add the channel attendance to -1.

IO processor 9-1 is line 9-12, line 9-14
The dual port RAM in the CPU 12-1 is accessed via to obtain the mode and address information regarding the DMA.

IO processor 9-11 is line 9-12, line 9-14
The buffer memory 2 is accessed via.

Multi-bus 12-read from the buffer memory 2
16-bit data on 13 is multi-bus 12-13, line 9
It is taken into the IO processor 9-1 via -14 and line 9-12.

The IO processor 9-1 outputs the upper 8 bits of the 16-bit data to the line 9-12, line 9-13, internal bus 9-5,
Take it into the disk unit 9-11 via line 9-28.

Next, the lower 8 bits are taken into the disk unit 9-11 by the same route as.

The above steps are repeated until the EXT signal appears on the line 9-32.

The SINR signal on line 9-16 interrupts the CPU 12-1 to terminate the DMA.

In this way, the image information is DMA-transferred between the buffer memory 2 and the disk memory 4 (disk unit 9-11). Further, the DMA controller 9 for controlling this DMA has a master function capable of controlling the multi-bus 12-10, and accesses the buffer memory 2 in the buffer memory circuit block 12-3 which is a slave function circuit block by this master function. be able to. Therefore, the CPU 12-1 can execute other operations necessary for image processing during the transfer of the image information.

Furthermore, there are two circuit blocks with master function, namely
The CPU 12-1 and the DMA controller 9 are given priority to the CPU 12-1 with respect to the use of the multibus 12-10. As a result, the DMA controller 9 becomes a multibus 12-10.
If the CPU 12-1 does not complete the image processing and the preprocessing using the multi-bus 12-10 related to the operation of each unit even if the DMA transfer is requested using the DMA transfer, the DMA transfer is prohibited. Therefore, it is possible to prevent contention due to signals from a plurality of blocks on the multi-bus line 12-10.

[Memory space of multi-bus]

The memory map in the four circuit blocks related to the multibus 12-10 will be described below. CPU circuit block 12-
1 has a 32KB YTE dual-port RAM and an 8KBYTE ROM as a program memory for the CPU 8086. The buffer memory circuit block 2 is the memory capacity when reading an A4 size image at 12 pel / mm, that is, the capacity of 8,709,120 bits (1
725,760 words) with 2 bits as 1 word). leader&
Printer sequence controller circuit block 12-4
Has a dual-port RAM with a capacity of 2KBYTE. All of these are memory mapped memory, and memory write command MWTC signal and memory read command MR
Accessed from multibus 12-13 by DD signal. In addition, there is a ROM, which is a program memory for the 4KBYTE CPU8085, on the internal bus of the reader & printer sequence controller circuit block 12-4, and this is also a memory mapped memory that is accessed by the read RD signal of the CPU8085. For −13, since this is a slave function, this CP
The address from U8085 never comes out. Also, in the DAM controller circuit block 9, a 4KBYTE ROM which is a program memory of the IO processor 9-1 is provided on the internal bus 9-5. Since this memory is an I / O mapped memory, this ROM is Even if the IO processor 9-1 makes an access, its address does not appear on the multibus 12-13, and this memory cannot be accessed from the multibus 12-13.

FIG. 14 shows a memory map related to the multibus 12-13.
The address space of the multi-bus 12-13 is a memory mapped memory space, one address per 1 BYTE of data, 000
It is 1MBYTE from 00 to FFFFF. F as the allocation of this space
SKBYTE from E000 to FFFFF in the CPU line block 12-1
Program memory space for 8086. The buffer memory 2 is 755,760 WORDS as described above, and it is 1,451,520 BYTE when it is converted into BYTE units, and the memory space of 1 MBYTE exceeds the buffer memory space. Therefore, the buffer memory space is divided into two banks and each address space is divided. Is the 725,760 address, and the bank switching is CPU12-1.
Signal (line 12-28 in FIG. 9) from the hardware. The space of bank O is 0A000 to BB2FF, and the space of bank 1 is 0B300 to BC5FF. 21KBYTE dual port RAM in the reader & printer sequence controller circuit block 12-4 is mainly used for the CPU in the block.
In the communication between the 8085 and the CPU 8086 in the CPU block 12-1, 08000 to 087FF is allocated as its address space.
As the address space for the CPU8085 to access the dual port RAM, since this RAM has only 64 KBYTE space, the same addresses 08000 to 087FF are given.

Next, 8KBYTE of the 32KBYTE dual port RAM in the CPU circuit block 12-1 is connected to the CPU8086 and DM in this block.
Used for communication with the CPU 8089 in the A controller circuit block 9, and assigns 06000 to 07FFF as its address space. On the other hand, the address when the CPU 8089 accesses this space, that is, this address viewed from the CPU 8089 is different, and is FF800 to FFFFF. That is 0600
0 corresponds to FF800 and 07FFF corresponds to FFFFF. Therefore, FF800 to FFFF in the CPU circuit block 12-1.
If the address of F is entered, enter this address code in RWOM
The address is converted by hardware so that it becomes 06000 to 07FFF via. 00000 to 05FFF is allocated as the address space of the 24KB YTE dual port RAM other than the above.

The above is the memory space related to the multibus 12-10. However, the reader & printer sequence controller circuit block 12
The address space of the 4KBYTE ROM in -4 is assigned 00000 to 00FFF as the memory mapped memory, and the address space of the 4KBYTE ROM in the DMA controller circuit block 9 is assigned 00000 to 00FFF as the I / O mapped memory.

[Structure of buffer memory]

FIG. 15 shows an address map of the buffer memory 2 in the buffer memory circuit 12-3. This buffer memory 2 is A4
It has the ability to store information that resolves a size (288 mm × 210 mm) to 12 pixels per 1 mm. The direction of main scanning of this original by the reader unit 1 is 288 mm in the lengthwise direction, which is decomposed into 12 pixels per 1 mm and comes in from the CCD, so that 3,456-bit pixels are inputted in one scanning. The width of the sub-scan is 210m.
At m, 12 lines are scanned per 1 mm, so that A4 scans 2520 lines in total. Therefore, the memory size is 8,709,120.
I have a bit. 3456 bit pixels are serially input 2520 times for each A4 size original.

How the image information input in this way is assigned and stored will be described. First, the manuscript is divided into 1 mm × 1 mm square unit blocks, and this unit block is used as one memory block, and an A4 original is composed of 60,480 blocks. In other words, this memory block has 12 bits of 12 lines, that is, 144 bits of image information. 1 word for 12 bits
If one address is given as, the memory block is composed of pixel groups having 12 addresses. Therefore, the total memory space has 725,760 addresses and addresses 0 to 725,759, HE
The XA code makes the address space from 00000 to B12FF. Therefore, 3456-bit serial image information for one line is divided into 12-bit pixel groups each corresponding to a length of 1 mm and extracted. The first pixel group is stored at address 00000, and the next 12-pixel group is stored.
Bit pixel group to 0000C, then 00018,00024 ...
The last 12-bit pixel group of the first line is stored at address 00D74. That is, the image information obtained by scanning one line is divided into pixel groups of 12 bits each and sequentially input to jump addresses of 12 addresses. Next, when serial image information of 3456 bits for the second line is input, it is divided into 12 bits in the same way as the first line, and each pixel group is 0 to 0 every 12th address.
It is stored up to address 0D75. In the same manner, image information for a width of 1 mm and a length of 288 mm is stored at addresses 00000 to 00D7F. Then, the image information of the 3456th bit on the 13th line is similarly decomposed and stored at every 12th address from 00D80. The data is stored in this way, and the last 12 bits are stored at address B12FF.

1m when using the method of storing with the above address
The entire A4 area will be stored in consecutive addresses in units of m × 1 mm squares. As a result, the image processing area is specified by the digitizer 4 in mm, so when transferring the specified area to the disk memory 4, DMA transfer is performed,
Just by setting the start address and the end address, you can transfer at high speed without going through the CPU.

That is, by designating one set of the start address and the end address, the image information for 12 main scanning lines is DMA-transferred. That is, the image information of 1 mm width is extracted by designating the start address and the end address once. Therefore, the address setting at the time of DMA transfer is small, and the transfer speed can be increased. This is more effective when extracting image information. To extract an image, addresses are continuous from the right side to the left side of the layer to be extracted, so for example, when extracting the image information with a vertical length of 20 mm, the address setting by the CPU is 20 times. Become.
In this way, the image signal of the desired area for one page stored in the buffer memory as the temporary storage means is extracted by the DMA transfer.

Further, since the address corresponds to the image in mm unit, the address can be set in mm unit, which is convenient for the user. In addition, this embodiment has 12
Since a line sensor with bit reading capability was used, 12
Although one address corresponds to one bit, the number of bits may be another value depending on the capability of the line sensor, and the same effect can be obtained by setting the address in units other than mm, such as inch. The initial address of each line to the buffer memory 2 is obtained by the CPU setting the initial value in the address counter. Also, when the image information is output from the buffer memory 2 to the laser beam printer 3, it is read every 12 addresses from the initial address as in the case of input.

FIG. 16 shows an address map when the buffer memory 2 is viewed from the multibus 12-10. The address space of 00000 to 5897F in FIG. 15 is set to bank 0, the address space of 58980 to B12FF is set to bank 1, and this space is set to OA000 to BB2, respectively.
Corresponds to the address space of FE and OB300 to BC5FE. Multibus 12-10 has a 16-bit data bus and a 20-bit address bus, but the area accessible by this bus is 1MBY.
It is said to be TE. In other words, 1M pieces of 8-bit data can be accessed, and when accessing 16-bit data, since it reaches address 2, 16-bit data is input / output only when accessing even addresses in WORD mode. It For this reason, as is clear from FIG. 16, every other consecutive address is assigned. Since the real address in the buffer memory circuit block 12-3 is the address shown in FIG. 15, when the buffer memory 2 is accessed from the multibus by the address shown in FIG. 16, a circuit for converting this address to the address shown in FIG. 15 by hardware. In the buffer memory circuit block 2. By having this address conversion circuit, the address area of the buffer memory can be set in an arbitrary address space.

The contents of the buffer memory circuit block 12-3 in FIG.
Shown in Figure 17. As shown in the figure, this block is divided into five circuit units: memory controller 2-1, memory A2-2, memory B2-3, memory C2-4, terminator 2-5.
All of these units are connected by an internal bus 2-6. The memory controller 2-1 is also connected to the multibus 12-14, and is accessed as a slave function from the multibus 12-14 as a whole of the buffer memory circuit block 12-3. Further, a bank switching signal is supplied from the CPU 12-1 via the line 12-28, serial image information is input from the shift memory 12-5 via the line 12-26, and the printer unit 3 is supplied from the line 12-30. The image signal is output to the laser driver. Memory A, B, C are 16K dynamic RAM
And its capacity is 256 Kwords with 12 bits as 1 word. IM1440IMG manufactured by NISSAN ELECTRONICS
Please refer to the IM1440IMG manual for details. Address signal lines on the internal bus 2-6,
A data signal line, a read signal line, a write signal line, a refresh signal line, a memory status signal line (MEMORY BUSY), and an acknowledge signal line are input. Multibus 12 for each of memories A, B, C in Table 1
-14 represents an address accessed from -14 and an address converted in the memory controller 4-1 on the E internal bus.

FIG. 18 shows a circuit diagram of the memory controller 2-1 in the buffer memory circuit block 12-3. 2-1-1 and 2
-1-2 is a serial-in parallel-out 12-bit shift register. 2-1-3 is a 12-bit write data line, which is an image increase of 3456 bits per serial scanning line from the CCD on the line 2-1-4. 2-
1-5 is a selection signal of the register 2-1-1 and the line 2-1
-4 clock signal for serially inputting 12-bit image information and the input 12-bit information on line 2-
It is an output enable signal for paralleling out to 1-3. 2-1-6 is a control signal for the register 2-1-2 having the same function as that of 2-1-5. 2-
A writing timing generator 1-7 uses a writing synchronizing signal (appears at the beginning of the serial signal of each line) and a writing clock accompanying the image information from the CCD to register 2-1.
-1 is selected, a clock is given to this, and the first 12 bits of the image information continuously input for one page are registered in the register 2-1-1.
To the register 2-1 and input the next 12-bit image information.
-2 is selected, the same clock is applied to this register, and the output enable signal is applied to the register 2-1-1 at the time when this image information is input to the register 2-1-2. The image information already stored is output to the memory input line 2-1-3. That is, while the data is serially in the register 2-1-1, the contents of the register 2-1-2 are parallel-out, and conversely, while the data is serially in the register 2-1-2, the register 2 is serially-in. The timing signals 2-1-5 and 2-1-6 are generated so that the contents of 1-1 are output in parallel. As a result, one page of serial image information from the reader unit 1 can be parallel-out to the memory without interruption. In addition, the write timing generator 2-1
-7 must output the address of the memory storing the data to the address bus line of the internal bus 2-6 at the timing of parallel data output from the register to the memory input data line 2-1-3. Therefore, a clock pulse for counting up is generated in the line 2-1-8 so that the value of the address counter 2-1-9 becomes the value at the timing of parallel out. That is, as mentioned above, this address is 00000,0000C, 00018
The clock pulse is set to the value of every 12 counts like this, so that this clock pulse has two shift registers 2-1-1 and 2-2.
The data is output so that it counts up by 12 while the data is alternately output between -1-2. Further, the write timing generator 2-1-7 is a memory input data line 2-1-3.
Since the memory write signal must be output on the control bus line of the internal bus 2-6 at the timing when the data is output above, the signal is generated on the line 2-1-10.

12-bit shift register for read data 2-1-11 and 2
Numeral -1-12 is a parallel-in / serial-out 12-bit shift register for parallel-in of 12-bit parallel image information read from the memory and serially outputting it to the line 2-1-14. Read timing generator 2-1-15
Is a memory output data line 2-1-13 while serially outputting the information stored in the register 2-1-12 by using the read horizontal synchronizing signal (beam detect signal in the laser beam printer) and the read clock. Load signal and register 2-1-12 for parallel loading the above data into the read data 12-bit shift register 2-1-11
Waiting for the completion of the serial output of the signal, a clock signal for shifting the loaded data and serially outputting the data on the line 2-1-14 is provided to the signal line 2-1-16,
Further, while the register 2-1-11 serially outputs the contents, a load signal for parallel loading the data on the memory output data line 2-1-13 to the register 2-1-12 and the register 2-1-11. Following the completion of serial out, shift the loaded data to line 2-1.
Generate a clock signal on line 2-1-17 for serial out on -14. Memory output data line 2-
In order to read the data on 1-13, the address must be output on the address line of the internal bus 2-6. Therefore, the value of the address counter 2-1-9 is the memory output data. Before the data is output to the line 2-1-13, a clock pulse that counts up to that value is generated on the line 2-1-18. That is, as described above, since this address has to be a value for storing data such as 00000,0000C, 00018, ... Every 12 counts, this clock pulse has two shift registers 2-1-11. And 2-1-12 are alternately input, the data is output so that it counts up by 12 counts. Further, the read timing generator 2-1-15 has to output the memory read signal on the control bus line of the internal bus 2-6 at the timing when the address is output. Raise over 19. The address converter 2-1-20 is provided for converting a multi-bus address into an internal bus address as shown in Table 1, and is composed of a ROM. CPU12-1 is DMA
When the buffer memory 2 is accessed by the controller 9 via the multibus 12-14, its address information is given to the line 2-1-21 together with the bank switching signal,
This address converter 2-1-20 uses the memories A, B, and
The selection signal to select which of C is selected is line 2-1-22.
To the line 2-1-23. Specifically, the address information specifically converted therein is output to the line 2-1-23. Also, multibus 12
When accessing from -14, the memory ride or read signal is given to the control bus line together with the address in the previous period. Therefore, the memory read / write signal is sent on the control bus line of the internal bus only when the buffer memory 2 is accessed. A signal for enabling to ride is output to the line 2-1-24. In this case, the data of the multi-bus 12-14 is output to the data bus line of the internal bus 2-6 on the line 2-1-3 at the time of memory write through the line 2-1-25 at the same timing as the address information. At the time of reading, the data on the data bus line of the internal bus 2-6 gets on the line 2-1-13,
It is input to the data bus line of the multi-bus 12-14 via the line 2-1-25.

As described above, when inputting serial image information from the CCD, 00000,00001,00002, ..., 000 for each line
An initial address like 0B is preset by the CPU 12-1 to the address counter 2-1-9 via the multi-bus 12-14. The preset value appears on data line 2-1-27 via line 2-1-2, and the I / O mapped I
As / O, the address appears on the line 2-1-21 and, through the decoder 2-1-27, the decoded signal is transferred to the line 2-1-26 as the chip selection signal of the address counter 2-1-9. Is entered. And multi-bus 12-14
The IO write command that appears on the control bus of is led to the line 2-1-28 and gated by the chip select signal. When the chip select occurs, this command signal causes the line 2-1.
-3 is loaded in parallel to the address counter 2-1-9. Line 2-1 after initial value is loaded
Count up with a clock pulse on either -8 or line 2-1-18. Like the address converter 2-1-20, the output of the address counter is performed by dividing the memory selection signal into the line 2-1-22 and the specific address in each memory into the line 2-1-23. . The signals on the line 2-1-30 are the memory write command and memory read command signals output when the CPU 12-1 or the DMA controller 9 accesses the memory. By commanding the signal on the line 2-1-24, the command signal is output only when the buffer memory 2 is accessed on the line 2-1-31. Line 2-1
32 is line 2-1-10, line 2-1-19, line 2-1
It is a memory write / read signal generated by one of the signals of −31. 2-1-33 is an internal bus from each memory A, B, C 2-
Memory busy output to control bus line 6
An MB signal (indicating that the memory is in a read or write operation) and a memory cycle enable MCE signal (indicating that the memory is in a read, write or refresh operation) and a refresh control circuit 2-1. 35 for CPU 12
When the refresh trigger signal from -1 comes,
Confirm that it is neither an MCE nor MB signal, and apply a refresh pulse on the line 2-1-34 at a cycle of about 500 nsec for 128 times, which is a sufficient number to refresh the 16K dynamic RAM. Output. If the MB or MCE signal is output during the output of this refresh pulse, the refresh pulse output is temporarily suspended and the memory access by these signals is terminated, and a further refresh pulse is output. .

Therefore, it is possible to prevent contention between the refresh pulse and the memory access pulse in the dynamic memory.

As described above, according to the present invention, the image signal from the reading means is stored in the temporary storage means in accordance with the write address formed in synchronization with the reading operation of the original image by the reading means, and the 1 After the storage of the image signals for the pages is completed, the number of times DMA corresponding to the size of the area is performed in order to extract a desired area of the image signal stored in the temporary storage means.
The transfer data is set in the DMA transfer means, and the image signal is read out from the temporary storage means according to the read address formed in synchronization with the DMA transfer operation, and is transferred to the image file means.
Since DMA transfer is performed, when the image signal from the reading means is stored in the image file means, the reading operation of the original image by the reading means can be executed without being restricted by the storage operation of the image signal in the image file means, and The operation of storing the image signal in the image file means can be executed completely independently of the operation of reading the original image and at a high speed by the DMA transfer.

Further, according to the present invention, since the number of times of DMA transfer data corresponding to a desired area in the image signal for one page stored in the temporary storage means is set in the DMA transfer means, any number of pages within one page can be set. The area can be transferred to the image file means by DMA at high speed.

[Brief description of drawings]

FIG. 1-1 is a diagram showing the configuration of an embodiment of the image processing apparatus according to the present invention, FIG. 1-2 is a perspective view of the apparatus of this embodiment, FIG. 2 is a perspective view of the digitizer 6, and FIG. Is a detailed view of the surface of the digitizer in FIG. 2, FIG. 4 is a view showing the screen configuration of CRT7, FIG. 5 is a view showing the command type, FIG. 6 is a view showing an image processing example, and FIG. FIG. 8 is a diagram showing the application buffer, FIG. 8 is a detailed diagram of the operating section 8, FIG. 9 is a circuit block diagram of the apparatus of this embodiment, FIG. 10 is a circuit block diagram of the CRT & digitizer controller 12-8, and FIG. The illustration shows CPU 12-1
Fig. 12 is a circuit block diagram of the reader & printer sequence controller 12-4, and Fig. 13 is a DMA block diagram.
FIG. 14 is a circuit block diagram of the controller 12-2, FIG. 14 is a memory map diagram relating to the multi-bus, and FIG. 15 is a buffer memory 12
-3 is an address map diagram, FIG. 16 is an address map diagram of the buffer memory 12-3 related to the multibus, FIG. 17 is a circuit block diagram of the buffer memory 12-3, and FIG. 18 is a circuit of the memory controller 12-3-1. It is a block diagram, 1 is a reader unit, 2 is a buffer memory, 3 is a printer unit, 4 is a disk memory, 6 is a digitizer, 7 is a CRT, 9 is a DMA controller, and 13 is an operation unit.

 ─────────────────────────────────────────────────── (72) Inventor Yoshikazu Yokomizo 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Akira Suzuki 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon (72) Inventor Koichi Murakami 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Tadashi Yoshida 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. ( 72) Inventor Masaharu Tsukada 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Nao Nagashima 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Ken Miyagi 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (56) Reference JP-A-52-82162 (JP, A) JP-A-54-92032 (JP A) Patent Akira 49-128649 (JP, A) JP Akira 53-7144 (JP, A)

Claims (1)

[Claims] 1. A reading means for photoelectrically converting a document image to output a read image signal, a designating means for designating a desired area on the image, and storing the image signal output from the reading means in accordance with a write address, Temporary storage means for outputting the stored image signal on a read bus line according to a read address, image file means for storing a plurality of pages of the image signal output from the temporary storage means on the bus line, temporary storage means, image file Control means for controlling the means, DMA transfer means for DMA-transferring an image signal from the temporary storage means to the image file means via the bus line, supply means for supplying the write address and the read address to the temporary storage means And the supply means synchronizes with the reading operation of the original image by the reading means. To supply the image signal from the reading means to the image signal for one page in the temporary storage means, and a desired area designated by the designating means in one page stored in the temporary storage means. The control means sets the DMA transfer data to the DMA transfer means a number of times corresponding to the size of the area, and causes the DMA transfer means to perform the DMA transfer operation to extract the desired area from the temporary storage means. The image processing apparatus, which reads out the image signal of (1) and transfers the image signal to the image file means by DMA.