JPS58221437A - Controlling device of picturing - Google Patents

Abstract

PURPOSE:To transfer picturizing data at a high speed and to shorten the operation time of picturing, by dividing a picturized memory into several blocks and providing the titled device with a switching circuit to connect each block selectively and directly to a control computer. CONSTITUTION:The picturized memory 11 is divided into several blocks and one of them is selectively switched by a switching circuit 10 and connected to a main memory bus 8 of the control computer 1. Consequently, the selected block is enabled to execute the same transfer processing as that of a main memory 3. Therefore, the picturizing data can be transmitted from a file memory 2 to the picturized memory 11 only by one transfer and a large scale block determined by the block size of the memory 11 and the size of an address space to be assigned to the memory 11 can be transferred independently of the size of the memory 3. By changing a block to be selected appropriately, the address space of the control computer 1 can be expanded.

Description

[Detailed description of the invention] The present invention relates to a drawing control device.

Conventionally, in drawing devices that perform drawing using electron beams, etc., it is necessary to access a large amount of drawing data at high speed. 2 to the drawing memory 5 configured with a large-capacity IC memory, etc., and then the drawing control system 6 transfers control data (for example, pushing,
position, beam shape, etc.) and performs the drawing operation. However, in such a configuration, from the perspective of the control computer 1, the drawing memory 5 is regarded as an external memory via the Fi interface 4, and in data transfer,
After the data is once transferred from the file memory 2 to the main memory 3 by a method such as direct transfer, a process of transferring the data from the main memory 3 to the drawing memory 5 is performed. Therefore, due to restrictions such as the memory size that can be used as a transfer buffer in the implemented main memory 3 and the multiplexing of high-speed transfers, the data transfer speed decreases, and the drawing speed is likely to decrease due to data neck. There are drawbacks such as.

Furthermore, when the control computer 1 performs calculations on the drawing data, the processing time is longer because the calculations are performed on the main memory, such as by moving them from the drawing memory 5 to the main memory 3, and the contents of the calculations are limited to the installed memory size. There were drawbacks such as being limited by the size of the

An object of the present invention is to provide a drawing control device that enables high-speed transfer of drawing data and reduces calculation processing time for drawing.

In the present invention, a drawing memory is divided into several blocks, and a switching circuit is provided for selectively connecting each block directly to a control computer.

Hereinafter, the present invention will be explained in detail using Examples.

FIG. 1 is a block diagram showing an embodiment of the present invention,
The same parts as in FIG. 1 are represented by the same symbols. In the figure, the drawing memory 11 is divided into several blocks, and one of the blocks is configured so that it can be selectively connected to the main memory bus 8 of the control computer 1 by a switching circuit 10. Therefore, transfer processing similar to that of the main memory 3 is possible for the selected block.

As a result, the drawing data can be sent from the file memory 2 to the drawing memory 11 in one transfer. Furthermore, regardless of the size of the main memory 3 mounted, large block transfer is possible, which is determined by the block size of the drawing memory 11 and the size of the address space that can be allocated to the drawing memory 11. Furthermore, when performing graphic calculations by the computer 1, it is equivalent to the main memory 3, and the calculation speed can be improved. The address space of the control computer 1 can be expanded by switching the blocks to be selected in a timely manner. The other blocks that are not connected to the computer 1 are connected to the drawing control system 6 through the switching circuit 12, and control data for the drawing mechanism section 7 is created.

FIG. 3 shows details of the switching circuit 10. The address select circuit 20 obtains a drawing block access signal 23 from the upper address line of the memory bus 8 . Further, a block select signal 24 to be specified is obtained from the output of a block switching register 27 which is separately controlled by a computer. A bus connection signal 25 is obtained from these signals to control the bus open/close switch 22 and connect to the drawing memory 11.

As is clear from the above description, according to the present invention, it is possible to transfer drawing data at high speed, and the calculation speed can be improved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a conventional configuration, FIG. 2 is a block diagram showing an embodiment of the present invention, and FIG. 3 is a circuit diagram showing an example of a switching circuit. 1... Control computer, 2... File memory, 3...
・Main memory, 4...Drawing memory interface,
5゜11...Drawing memory, 6...Drawing control system, 7.
...Drawing mechanism section, 10.12...Switching circuit. Kaya hard $2 prisoner

Claims (1)

[Claims] 1. In a drawing control device that has a drawing memory that receives and temporarily stores drawing data from a large-capacity file memory under the control of a control computer, and performs drawing on the drawing data using an electron beam or the like, the drawing memory is A drawing control device comprising a switching circuit that selectively connects each block of a predetermined size directly to the control computer.