SU959112A1 - Apparatus for controlling printing mechanism - Google Patents

Description

(54) DEVICE FOR MANAGING THE PRINTING

MECHANISM

The invention relates to computer technology, in particular to external and peripheral devices of a computer designed to display information on a print, and can be used in start-stop printing devices with a movable print head. A device for outputting information is known, in which the printing of information with underlining is carried out at the same time by dragging is carried out by simultaneously printing the required character and the EXTRA symbol. The structure of this device includes registers for storing source data, constants and input information, a print control unit, a synchronizer, and a printing mechanism with a letter drum divided into blocks corresponding to each type of information and separate shock mechanisms for each block 1. Disadvantage This device is the complexity of the printing mechanism. The closest to the present invention is a device in which information is underlined during the re-run of a printed array, containing an input-output unit connected to a buffer memory, the output of which is connected to a printer mechanism adapter and a service character decoder in turn, is connected to the buffer memory and to the adapter of the printing mechanism, as well as a comparison element connected to the decoder of service symbols and to the print back unit The mechanisms in the initial position, the output of which is connected to the adapter printing mechanism 2. However this device is inherent in low speed. The aim of the invention is to improve the speed of the device. The goal is achieved in that the device for controlling the printing mechanism, which contains a synchronizer, the first output of which is connected to the first input of the matching unit, the first input to the first output of the matching unit, the second output to the control input of the buffer memory, information input

which is connected to the output of the information output unit, the second input, the second and the three. The outputs of the matching unit are connected to the corresponding input and output of the device, an encoder, a trigger, a “Unit” signal generator, a “Zero” signal generator, and a multiplexer, whose information input is connected to the output of the buffer memory block, are entered, with the first and second address inputs "The unit and signal conditioner" Zero, respectively, the group of address inputs - with the outputs of the tweeter, and the output - with a third of them the input of the matching unit, the second output of the synchronizer is connected to the input of the descrambler, the third input is to the trigger output, the installation input and the reset input of which are connected to the corresponding inputs of the decoder.

The drawing shows a block diagram of the device.

The circuit contains information output block 1, buffer memory block 2, signal conditioners "; Zero and" Unit 3 and 4, decoder 5, trigger 6, synchronizer 7, encoder 8, multiplexer 9, matching unit 10.

The device works as follows.

Block 1 receives from the computer and writes in block 2 the data to be printed. An information array printed with an underscore is framed with utility characters that define the beginning and end of the array. Upon request from the printing mechanism under the control of synchronizer 7, the first character is read from block 2 and through multiplexer 9 and block 10 enters the printing mechanism. At the same time, the output signal of the encoder 8 passes the character code read from block 2 to the output of multiplexer 9. After printing this character, the print head moves one position to the right and the printing mechanism sends the next request, from block 2 the next character is read, etc. So continues until block 2 reads the service character that defines the beginning of the array printed with underscore. A signal appears at the output of the decoder 5, which sets the trigger 6.

When each next character is read, the following occurs. The symbol code is transmitted through multiplexer 9 and block 10 to the printing mechanism. Upon receipt of a request for the next character from the printing mechanism under the control of the trigger b, the synchronizer 7 thus adjusts the encoder 8 so that the control code STEP BACKWARD from the imager 3 is transmitted to the output of multiplexer 9. left and set below the previously printed character. When the next request arrives from the printing mechanism, the synchronizer 7 adjusts the encoder 8 so that the EXTENSION symbol from the FIRMATER 4 passes through the multiplexer 9 output. Through the block 10 this code enters the printing mechanism and the symbol “-. The printhead moves one position to the right, the next character is read from block 2, and the entire cycle is repeated.

This continues until block 2 reads the service symbol defining the end of the array printed with underscore. In this case, the output signal of the decoder 5 resets the trigger 6 and under

By controlling synchronizer 7, characters are printed without underlining.

Claims (2)

Invention Formula A device for controlling the printing mechanism, comprising a synchronizer, the first output of which is connected to the first input of the matching unit, the first input to the first output of the matching unit, the second output to the control input a buffer memory block, the information input of which is connected to the output of the information output block, the second input, the second and third outputs of the matching block are connected to the corresponding input and output of the device, characterized in that, in order to improve the performance of the device, an encoder, a trigger, “One” signal conditioner, “Zero and multiplexer” signal former, whose information input is connected with the output of the buffer memory block, the first and second address inputs - with the outputs of the signal generator "Unit and the signal conditioner" Zero, respectively, the group of address inputs - with outputs and the output with the third input of the matching unit, the second output of the synchronizer is connected to the input of the encoder, the third input is connected to the output of the trigger, the installation input and the reset input of which are connected to the corresponding outputs of the decoder. Sources of information taken into account in the examination 1. Japanese Application No. 54-17528, cl. 97 (7) B322, published. 1979 2. For Japan Japan No. 53-26949, cl. 97 (7) B31, 1978 (prototype).