JPS5972272A - Raster scanning type hardcopy controller - Google Patents

Abstract

PURPOSE:To select a picture to be obtained as a hardcopy by providing a frame buffer memory switching part which stores a frame buffer memory with display data of either of the 1st and the 2nd refresh buffer memories. CONSTITUTION:An electronic computer 2 supplies display data on a picture to random scanning type graphic display controllers 4 and 5 on time-division basis. The controllers 4 and 5 store the display data in the 1st and the 2nd refresh buffer memories 4' and 5' and controls CRT monitors 6 and 7. The frame buffer memory switching part 21 selects the display data from the memories 4' or 5' and stores it in the frame buffer memory. A pixel generator 24 generates vector lines and characters from the display data. A raster scan buffer memory 25 transfers pixel data, line by line, to a raster scanning type hardcopy device.

Description

DETAILED DESCRIPTION OF THE INVENTION <Technical Field to Which the Invention Pertains> The present invention relates to a rask scan type hard copy control device, which controls images displayed on a random scan type graphic display connected to a computer in a rask scan type hard copy control device. The present invention relates to a RuskScan type heart cohesion control device that causes a copying device to make a hard copy.

<Prior art> Since a conventional rask scan type hard copy control device is fixedly connected to one random scan type graphic display control device, the data is stored in the refresh buffer memory of this random scan type graphic display control device. Although the display raw image can be directly hard-copied, it has the disadvantage that the display raw image stored in the refresh buffer memory of other random scan type graphic display control devices cannot be directly hard-copied.

OBJECTS OF THE INVENTION It is an object of the present invention to obviate the drawbacks of conventional such devices and to improve the display raw images stored in respective refresher buffer memories in first and second random scan type graphic display controllers. An object of the present invention is to provide a rusk scan type hard copy control device which can directly cause a rusk scan type hard copy device to hard copy either one of the following.

<Configuration of the Invention> According to the present invention, one of the display raw images stored in each refresh buffer memory in the first and second random scan type graphic display control devices is scanned by one rask scan. A rusk scan type hard copy control device that causes a hard copy device to make hard copies, the frame buffer memory storing display data in either the first or second refresh buffer memory, and the first or second refresh buffer memory. a frame buffer memory switching unit for controlling which display data of the Fuyubafura memory is stored in the frame buffer memory; and a frame buffer memory switching unit for controlling generation of vector lines and characters from the display data transferred and stored in the frame buffer memory. a pixel control unit, a pixel generator that generates vector lines and characters under the control of the pixel control unit, and stores pixel data that can be scanned by the pixel generator and generated by the pixel generator.

a raster scan buffer memory for transferring pixel data row by row to the raster scan hardcopy device; and a display stored in each refresh buffer memory in the first and second random scan graphic display controllers. A rusk scan type hard copy system ML device is obtained which makes it possible to directly make a hard copy of one of the raw images in a ruskscan type hard copy device.

<Explanation of Examples> Next, embodiments of the present invention will be described with reference to the drawings.

The drawing shows a rask scan type hard copy control device which is an embodiment of the present invention. In the figure, an electronic computer 2 transmits images (display data) to be displayed on each random scan type CRT monitor 6, 7 to each random scan type graphic display control device 4, 5 in a time-sharing manner via an interface control unit 3. supply to. In this display control device 4.5, each display data is sent to a refresh buffer memory 4'.

5' and controls to display the image on the CRT monitor 6.7 according to the stored data.

On the other hand, the rusk scan type hard copy control device 1 of this embodiment uses the two frame buffer memories 4' and 5.
a switching unit 21 for selecting display data from ';
A frame buffer memory 23 that stores display data that has passed through the switching unit 21, a pixel generator 24 that generates vector lines and characters from the display data stored in the memory 23, and stores pixel data from the pixel generator 24. and a raster scan buffer memory 25 for transferring the pixel data to the two-star scan type hard copy device 10;
A hard copy operation control section 20 is activated by the first and second note copy starting switches 8 and 9 to control the frame buffer memory switching section 21, and the frame buffer 23° and the pixel generator 24 are operated. The pixel controller 22 includes a pixel controller 22 for controlling the pixels.

The image displayed on the first random scan type CRT monitor 6 is generated by display data stored in the refresh buffer memory 4' in the first random scan type graphic display control device 4 at a rate of 30% per second.
The image displayed on the second random scan type CRT monitor 7 is also displayed repeatedly at a speed of ~40 times. The display data stored in the buffer memory 5' is displayed repeatedly at a speed of 30 to 40 times per second. These display images are.

These are 11 completely different images that have been previously transferred from the slave computer 2 to each refresh buffer memory via the interface control unit 3.

Here, the image displayed on the first random scan type CRT monitor 6 is transferred to the first random scan type hard copy device 1o.
When you want to make a hard copy.

After confirming that the Rusk Scan type hard copy device 10 is not in use, the first hard copy start switch 8 is turned on to start it up. The hard copy operation control unit 20 that has detected this activation signal issues a hard copy activation request to the computer 2 via the interface control unit 3 as shown in the operation flow of FIG. In response to this startup request, the computer 2 issues a hardcopy startup command to the hardcopy operation control section 20 via the interface control section 3, thereby starting the hardcopy operation. The hard copy operation control unit 20, which has received the start command, instructs the frame buffer memory switching unit 21 to transfer data from the memory data bus 3 from the refresh buffer memory in the first random scan type graphic display control device 4 to the frame buffer memory switching unit 21.
0 and frame buffer memory 23 memory data bus 3
Connect the two. Frame buffer memory switching unit 21
Hard copy operation control unit 20 receives a connection completion signal from
causes the pixel control unit 22 to start a control operation. As shown in the operation flow of FIG. 3, the pixel control section 22 transfers the display data of the currently displayed image stored in the refresh buffer memory in the first random scan type graphic display control device 4 into frames via the frame buffer memory switching section 21. It is transferred to the buffer memory 23.

When the pixel control section 22 completes the transfer, it issues a frame bar/sofa memory transfer completion signal to the hard copy operation control section 20. The hard copy operation control unit 20 issues an interrupt to the computer 2 via the interface control unit 3 to indicate the completion of frame buffer memory transfer. Of course, when the electronic computer 2 receives an interrupt indicating the completion of the frame buffer memory transfer.

The display image can be updated in the frame buffer memory in the first random scan type graphic display controller 4, and display data to be displayed next can be transferred. During this time, the pixel control unit 22 controls the pixel generator 24 to generate pixel data consisting of a bladder extrusion vector line and a character from the frame buffer memory 23 by converting l frames of display data into the raster scan buffer memory 25. Write pixel data. The pixel data that can be written to the raster scan buffer memory 25 is 2048 on one hard copy.
X 2048 because it is output in 2048 pixels/line
It becomes x2048 pixels. Therefore, the pixel data of the frozen hard copy image is stored in the raster scan buffer memory 25, and the data of 2048 pixels corresponding to the first row is stored in the raster scan type hard copy device 10.
and the first line is hard-copied. By repeating the transfer operation for each line 2048 times in this manner, one hard copy is output.

When one hard copy is output, the pixel control unit 22
outputs a hard copy output completion signal to the hard copy operation control unit 2o. from the hard copy operation control unit 20 via the interface control unit 3;

By interrupting the hard copy output completion signal, the electronic total machine 2 can detect that the hard copy operation has been completed. Next, the second sindam scan type CR
When you want to make a hard copy of the image displayed on the 'II' monitor 7 to the hard copy device 10, first confirm that the hard copy device 10 is not in use, and then turn on the second start switch. Turn on and start it. This activation signal was detected.
The Tocobee operation control unit 20 issues a hard copy activation request to the electronic δr calculator 2 via the interface control unit 3. When the computer 2 receives this activation signal, it instructs the hard copy operation +IjlJ parallel 20 via the interface control unit 3 to issue a Tocobee activation command, and the hard copy operation is started again.

The hard copy operation control unit 20, which has received the start command, sends the frame buffer memory switching unit 21 to the second random scan type graphic disk display control unit. The memory data bus 31 of the refresh buffer memory 5' in f&5 and the memory data bus 32 of the frame buffer memory 23 are connected.

The hard copy operation control unit 2o receives the connection completion signal from the frame buffer memory switching unit 21, and the pixel control unit g[
! 22 to start the control operation. Pixel control unit 2
2 transfers the display data of the currently displayed image stored in the frame buffer memory 5' in the second random scan type graphic display control device 5 to the frame buffer memory 23 via the frame buffer memory switching section 21. The hard copy control operation once one frame worth of display data is transferred and stored in the frame buffer memory is the same as described above, and will therefore be omitted.

In this way, the images being displayed in the respective refresh buffer memories 4', 5' in the first and second random scan type graphic display control devices 4, 5 are separated by the switching function of the frame buffer memory switching section 21. Although it takes a while, it is hard-copied to the scan-scan type hard-copy device 10 that is connected to it.

<Effects of the Invention> As explained above, the present invention provides for the display of either one of the displayed images stored in each of the reflex memories in the first and second random scan type graphic display control devices. By using the RuskScan type/S-Tocobee control device which is equipped with a switching unit that can select the RasterScan type/S-Tocopy device, there is an effect that a noheid copy can be performed directly to the RuskScan type/S-Tocopy device.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a rusk scan type hard copy control device according to an embodiment of the present invention, and FIGS. 2(a) and 2(b) show the operation flow of the /-tocobee operation control unit used in this embodiment. Figure 3 is a diagram showing the operation flow of the pixel control section used in this embodiment. 1...Rusk scan type no-tocobee control device.

Claims (1)

[Scope of Claims] Either one of the displayed images stored in the refresh buffer memories in the first and second random scan type graphic display control devices is transferred to one rask scan type hardware. A rusk scan type hard copy control device that causes a copying device to make hard copies, a frame buffer memory that stores display data in either the first or second refresh buffer memory, and the first or second frame buffer memory. a frame buffer memory switching unit that controls which display data of the above is stored in the frame buffer memory; a pixel controller for generating and controlling vector lines and characters from display data transferred and stored in the frame buffer memory; and a pixel generator for generating vector lines and characters under the control of the pixel controller; a raster scan buffer for storing the raster scannable pixel data and transmitting the pixel data row by row to the raster scan type hard copy device;
A rask scan type hard copy control device, characterized in that the rask scan type hard copy device hard copies any one of the images displayed by random scanning.