SU600586A1 - Device for displaying symvols on crt screen - Google Patents

Description

one

The invention relates to the field of ar / tom, tics and computing technology for converting data from machine code into visual alphabet characters.

Devices are known for displaying the characters allocated from the decomposition elements of a small-format television raster of symbols comprising a register of a character code, a block of a usable type, and blocks of a sample of codes from a block of a usable one of 1.

The closest technical solution to the invention is a device containing a register of a code of a symbol, two ring counters, informational inputs of which are connected to a buffer usb unit, and control inputs - with a control unit, a usb unit, one of which inputs are connected to the outputs ring counters, others through a decipher to the outputs of the register of the code code, and outputs through the elements OR to the control inputs of two control voltage drivers 2.

The disadvantage of these devices lies in the same geometric dimensions of all displayed symbols.

The purpose of the invention is to expand the area of the device by changing the size of the characters.

This is achieved by the fact that a register has been entered into the proposed device.

character size, additional detail, two ground elements of the AND elements, a delay element and an impulse generator, one of the inputs of which is connected to the control unit through the delay element and the second input through the NLP element to the outputs of the control unit The code of the sign of the size of the symbol is associated with an upranle block, informational - with a block of us, and exits through a pre-i-block device and two soils of elements I - with matching inputs of the Lt and corresponding 1, their ring counters.

The drawing shows a block diagram of the proposed device.

The device contains registers 1 p 2 code code code n code size symbol, ring counters 3, 4, block 5 nostoyanoy us TP, generator 6 nmulsov, two groups of elements H 7, 8. decryptor 9 n doiolpigeln 1 1Y decryptor 10, element 11 delay , elements OR 12 and 13, formers 14 and 15 unravl yuid, 11X folders, control unit 16, and control buffer unit 17.

The device works as follows.

Claims (2)

The control signal, generated in the control unit, resets the registra 1 n 2 to zero. Under the action of the signal in, generated in block 16, the code of the displayed symbol is written to the IIM code of the SEMEULE register, the code of the character size of the character size is written into register 2 of the character size indicator, and counters 3 and 4 are sent to the unit. The outputs of register 1 through the defwriter 9 are closed at block 5 and are constantly closed. This achieves the formation of pulses of the nodlight Uz of the beam of an electron-emitting-beam tube, which are removed from the output of the element PI1. The signal in through the delay element 11 starts the generator 6, which produces short-term nm pulses. These pulses pass through one of the elements AND in the soil of the elements AND 7, since the bus of the decoder 10 is closed at their second inputs. The outputs of the group of elements AND 7 are closed for synchronization, and the inputs of the ring counter 3, which results in a unit increment of not. m under the action of each pulse of the generator 6. Moreover, this dried up, sequential sampling of all lowercase cores in the top row of cores in the block 5 of the permanent memory. If the second output bus of the decoder 10 is selected, the pulses from the generator 6 are received through the second element I of group 7 and from its output to the second synchronizing input of the ring counter 3. This ensures the unit is shifted in the ring counter 3 through the output of each odd core in the rows of the block 5 of the permanent memory. Similarly, the choice of the third output pin of the decoder 10 provides a unit shift in the ring counter 3 after two bits and therefore switching elements of the lines in the fixed memory block two times and so on. The pulses from the generator 6 output go to the information input of the shaper 14 control The voltage of their voltages is reached; in this case, a change in the voltage at its output is achieved according to a stepwise law synchronously with the switching of elements in block 5 of the permanent memory. The control voltage from the output of the former 14 is supplied to the horizontal deflection plates of the cathode ray tube. When the last element of a line is switched in a constant memory block, a pulse is formed, which, through an element of ILP 12, resets the shaper 14 to zero and goes to the information input of the shaper 15, thereby achieving a change in voltage at its output in a stepwise fashion synchronously with the switching of lines in the block and this memory. The same pulse arrives at the first inputs of elements AND of the second group of elements AND 8, the second inputs of which close the output buses of the decoder 10. The outputs of the second group of elements And 8 close the synchronizing inputs of the ring counter 4. This ensures either a sequence or through a line or after two, etc., a sampling of rows in block 5 of the aiologicio permanent memory with a sampling of elements in the rows. This process continues until the last element in the block 5 of the permanent memory is selected, when a pulse c is generated that drops the shaper 15 to zero, disrupts the generation of the generator 6 and informs the control block 16 about the end of the formation of control voltages for characters of this size. The smaller the character size, the shorter the time it takes to form it. An apparatus for displaying symbols on a cathode-ray tube screen, containing a symbol code register, two ring counters, whose information inputs are connected to a buffer memory unit, and control inputs to a control unit, a fixed memory unit, one inputs connected to the outputs of the ring meters, others through the decoder to the outputs of the peiii symbol code, and outputs through the OR elements to the control inputs of two control voltage drivers, which are averaged by the fact that the application area of the device due to the change in the size of the characters, the register of the character code of the character size, the additional decoder, two groups of elements AND, the delay element and the pulse generator, one of the inputs of which through the delay element is connected to the control unit, and the second input through the elements OR - to the outputs of the fixed memory unit, the control inputs of the register of the iresiac code size of the symbol are connected to the control unit, the information ones - to the memory unit, and the outputs through an additional decoder and two elements Commerce And - with control inputs of the corresponding ring meters. Sources of information taken into account by expertise 1.Television methods and display devices. Ed. MI Krivosheev. M., “Soviet Radio, 1975. 2.Govorov V.S. The display of machine replays in a CRT screen. M., “Soviet Radio, 1975. (f) (t)