SU903856A1 - Device for editing data on text display screen - Google Patents

Description

I

The invention relates to automation and computing technology and can. be used in text displays on cathode ray tubes.

A device is known which, in addition to wide-ranging editing functions, implements the following functions:

erasing text from the position of the cursor to the end of the line with the same position of the cursor;

erasing text from the position of the cursor to the end of the frame with the same position of the cursor;

erasing the mark in the position of the cursor with the subsequent installation of the cursor in the next familiarity;

erasing fragments of text enclosed in special cursors l.

A disadvantage of this device is its low speed.

The closest to the invention on the achieved result is a device that implements the function

delete the last characters, words, sentences. Such device contains serially connected first S1I element connected to the fault Reset of erase mode, erase register connected to external Type of erase command, descriptor of start of rubbing, second OR element, cursor counter, first AND element connected to jane Overwriting resolution, address counter connected to the second element OR, a memory block connected to the bus Recording a space, a descrambler of windows erasure signs and an AND-OR element connected to a descrambler of signs of the start of an erasure and the first element and OR 2.

However, the proposed device

When implementing the function, erasing the last word erases the unnecessary word. To eliminate such errors, the last character erase function is used, which reduces the speed of the device. The purpose of the invention is to increase the speed of the device. This goal is achieved by the fact that in a known device for editing information on a text display screen containing the first element OR connected in series to the bus Reset erase mode, erase register connected to the bus Type of command of the page, decrypter of the signs of erase start, second element OR, cursor counter, first AND element connected to the bus Permission of a write record, address counter connected to the second element OR, memory block connected to the bus Write space, decoder when erase characters and an AND-OR element connected to the erase start attributes decoder and the first OR element, a third AND element connected in series, connected to the erase and start signs decoder, a trigger connected to the I-CM element, the fourth AND element, connected to the bus The end of the character string, and the third I-W element connected to the erasure descrambler and the I-WN. The drawing shows a block diagram of the proposed device. The device contains an EHR register 2 erase, a descrambler 3 erase start signs, an OR 4 element, a cursor counter 5, an AND 6 element, an address counter 7, a block of 8 operative memory, an 9 erase operation terminator, an AND-OR element 10, element AI, trigger 12, element I 3 and element CM 14 o The device works as follows about 4S

at once.

In the mode of erasing the last word, when erase1 “1st fragment is located on the borders of lines of text, the following situations are possible:

the first character of the erasable word is on the first line of the line;

the beginning of the erasable word is on the previous line, and the end is on the next;

words are separated by a blank (zero byte of RAM).

Indicated by the Space or Empty. If there are no signs of Space and Empty, then the stop is possible only if there is a GLC, provided that there is no sign of Transfer.

The proposed device for editing information in the part of erasing the last word has an increased speed when the erasable word is located on the borders of the iconic lines and ensures the erasure of the sign in arbitrarily complex texts. All considered situations take place in real texts. The end of the erase operation of the last word that is at the beginning of the line is realized by the presence of the gate. The end of the character string of the GLC, which through the open element 13 and the element ШВ1 14, resets the trigger 12 and the register 2 erase. The gate is allowed to pass through the gate And 13 is provided with a zero state of trigger 12, which is cocked (transferred to the state of Units) only when the device erases the transfer character in the last-word erase mode. In other words, if a word starts at the beginning of a line, then, resetting the erase mode is canceled by p1, and the cursor is in the last decimal place of the previous line. If there is a hyphenation in the word, then the trigger 12 driven by element 11 and 11 prohibits the passage through the circuit OR 14 of the GLC gate, and the erase operation is carried out further to the first Space or Empty, signs of which are generated from the outputs of the decoder 9. , the stop of the clearing is performed by the Blop Blister code sign Empty, from the output of the decoder 9, which through the element OR 1 and I-IZh 10 resets the register 2 to clear, and also sets in О the trigger 12 (if it was cocked). If there is a sign of erasing the last word, a sign of erasure is formed, which is used to switch RAM to the Record mode, and an address counter (SCN) and a cursor counter (SCN) to the subtract mode. Stop last-word erase mode unconditionally ocjnue Formula for editing information on a text display screen containing serially connected first IZH element connected to bus Reset erase mode, erase register connected to bus Type of command erase wiping decoder, second element CMM, the cursor counter, the first element AND, pod1d1yuchenny to the bus Resolution rewriting, the address counter, connected to the second element OR, memory block, connected bus, a space record, an erasure termination decoder, and an AND-OR element connected to the erasure start attribute decoder and the first OR element, which is denoted by the fact that, in order to improve the speed of the device, the third element connected in series is inserted into it to the scramblers for the start and end of the erase, the trigger connected to the AND-OR element, the fourth AND element connected to the bus End of the character string, and the third OR element connected to the erase end character decoder And ementu-Hilti. Sources of information taken into account in the examination. 1. Manual on the operation of the model DM-2000.2.043. RE. 2. USSR author's certificate as per tP 2812840 / 18-24, cl. G 06 K 15/20, 08.15.79 (prototype).

Claims (1)

Claim A device for editing information on a text display screen containing the first OR element connected in series to the bus Reset the erase mode, the erase register connected to the bus Type of erase command descrambler signs start erase, the second OR element, cursor counter, the first element AND connected to bus Rewriting permission, address counter connected to the second OR element, RAM block connected to the bus Recording a space, the decoder of the signs of the end of erasing and the AND-OR element, p Connecting to the decoder signs erasing start, and the first element or of the aphids 6 sistent I that, in order to improve device performance, it administered serially connected third AND gate, under ⁵ Turning to decoders symptoms start and end erasure trigger connected to the aND-OR element, a fourth aND gate connected to the bus line end sign and tre ⁰ Tille OR element connected to the decoder to erase characteristics closure element aND-OR.