SU1718210A1 - Device for input information in calculator - Google Patents

Abstract

The invention relates to input devices for keyboard computers, in particular calculators. The aim of the invention is to expand the field of application of the device by allowing several programs to be entered into the calculator. The device contains the first 1 and second 7 code converters, the first 2 and second 3 registers, the first 4 and second 6 memory blocks, counter 5, key block 8, start block 9, first 10, second 11 and third 12 elements And, from the first the fourth formers 13, 14, 15, 16, the OR element 17 and the trigger 18. The goal is achieved by introducing into the device of the first memory block 4, the first converter 1 codes, the first 2 and second 3 registers, the fourth driver 16, the second 11 and the third 12 elements I. 1 h. item f-ly, 2 ill. sl 00 you

Description

The invention relates to input devices for keyboard computers, in particular calculators.

The aim of the invention is to expand the field of application of the device by providing the possibility of inputting several into the calculator; programs.

FIG. 1 shows a functional diagram of the device; in fig. 2 is a diagram of the launch unit.

The device contains the first converter 1 codes, the first 2 and second 3 registers, the first memory block 4, the counter 5, the second memory block 6, the second converter 7 codes, the key block 8, the start block 9, the first 10, the second 11 and the third 12 elements AND, first 13, second 14, third 15 and fourth 16 drivers, element OR 17 and trigger 18, information input 19 of the device, first 20 and second 21 clock inputs of the device and output 22 of the device, connected in parallel with the calculator keys. The start block 9 contains the first 23 and second 24 triggers, the OR element 25, the first 26 and the second 27 switches.

The device works as follows.

After power is applied to the device, it is reset to the device by sending a reset signal by switch 27. A reset signal through the OR element 25 of the launcher 9 is fed to the R-trigger device 24. In this case, the Log signal. From the direct output of the trigger 24, the element AND 10 is closed at the second input, and the signal Log.1 from the inverse output of the trigger 24 opens the element And 12 at the first input. Then the initial data for the problem to be solved are entered into the calculator registers. On the calculator indicator, for example, the MK-61 (not shown in the figures), the number of the problem to be solved is chosen in the older two bits. The segment code from the calculator on the input 19 is fed to the input of the converter 1 codes and the inputs of the element OR 17.

The bit segment code arrives synchronously with the control clock signals at inputs 20.21. In the converter 1 of codes, the segment code is converted into binary-decimal and is fed to the information inputs of registers 2 and 3. A constant storage device can be used as a converter of the segment code. Upon the arrival of the segment code of the most significant bit, its binary-decimal value from the output of the converter 1 of the codes is inputted from the control signal from the input 20 to the register 2. Upon the arrival of the segment code of the next

the least significant bit of its binary-decimal value is entered from the control signal from input 21 to register 3.

From the outputs of registers 2 and 3, the binary-decimal code of the task number is fed to the address inputs of memory block 4. The sampling signal (reference) to the control memory unit is connected to the power supply bus of the device and is continuously supplied. In this connection, to retrieve a cell from memory block 4, similarly for memory block 6, it is sufficient to submit the corresponding address to its address inputs. In block 4 of the memory, the starting addresses of the programs of the respective tasks are stored. According to the value of the binary-decimal number of the task, from memory 4, the starting address of the corresponding program entered into memory 6 is selected, which is entered into counter 5 by a signal from shaper 16 at the address set in counter 5 at the second one-bit output unit 6 memory selects the code Log. O, which arrives at the second input of the element 11 and closes it, preparing the device for operation. In this case, the signal is not allowed to reset via the OR element 25 to the trigger 24, which is generated on the AND 11 element from the signal from the output of the driver 15.

The task number segment code from input 19 also enters through the OR element 17 to the information input of the trigger 18. According to the control signal from the input 20, the trigger 18 is set to one, and the Log signal. 1, from its output, opens element AND 10 at the first entrance. The device is ready to perform the corresponding task, the number of which is dialed on the calculator display.

To start the device, a start signal is given from switch 26. Trigger 23 is switched. The leading edge of the signal from the output of trigger 23 arrives at the clock input of trigger 24, the latter is set to one. When trigger 24 is set to a single state, the AND 12 element closes from its inverse output, prohibiting the control signal from input 21 to the control input of counter 5, and the AND 10 signal opening from its forward output shaper 13 is started from the output of element 10. The signal from shaper 13 output goes to the counting input of counter 5 and adds to its contents 1. At the new address set in counter 5, the first program command is selected from memory block 6,

the code of which is fed to the converter 7 codes.

At the second output of the memory block 6, the code O is also selected, by closing the element 11 on the second input. On the falling edge of the signal from the output of the imaging unit 13, the imaging unit 15 is started, the signal from which is fed to the gate input of the converter of 7 codes. At the same time, at the output of the converter 7 of codes, a signal is generated to control one of the keys of the block of 8 keys. A block of 8 keys at the input 22 short-circuits one of the calculator buttons. The calculator starts the execution of the command, during which the segment code is not sent to the calculator indicator, the issue of control signals to the inputs 20.21 is not prohibited. At the same time through the element OR 17 to the information input of the trigger 18 receives the signal Log. A. According to the control signal from input 20, trigger 18 switches and closes element 10. When calculating results appear on the calculator indicator, a Log signal appears at information input of trigger 18. 1. On the control signal from input 20, trigger 18 switches and opens element AND 10. At this, the leading edge of the signal from output of element 10 triggers shaper 13, adds 1 to the contents of counter 5, fetches the next command from memory block 6 and processes entering commands into the calculator is repeated. Entering commands into the calculator is repeated until code 1 is selected at the second output of memory block 6. When code 1 is sampled at the second output of memory block 6, And 11 opens at the second input.

In this case, when a signal is generated by the shaper 15, at the output of the element 11, a signal is generated, which through the element OR 25 resets the trigger 24 of the starting block 9. The signal from the direct output of the trigger 24 closes the element AND 10 at the second input and the process of generating start signals is terminated.

The device with respect to the prototype has more advanced capabilities, since it allows you to set the starting addresses of the array entered into the calculator. As a result, it becomes possible to add several programs to the memory of the programs and their random selection, to solve different types of tasks without changing the proposed ROM device with the program stitched.

Claims (2)

1. A device for inputting information into the calculator, comprising a second code converter, a start block, a first OR element, a second memory block, a key block, a counter, the first And element, the first, second and third drivers and a trigger, the direct output of which is connected to the first input of the first element I, the second input of which is connected to the first output of the start-up unit, and the output is connected to the input of the first driver, the output of which is connected to the input of the second driver, the output of which is connected to the gate input of the second converter code the output of the counter is connected to the address input of the second memory block, the first output which is connected to the information input of the second code converter, the output of which is connected to the input of the key block, the output of which is the output of the device, the input of the second generator is the first clock input of the device, the output of the second driver is connected to the clock input of the trigger, the information input of which is connected to the output of the OR element, whose input is the information input of the device, characterized in that in order to expand the application area by providing the possibility of entering several calculators into the calculator programs, the first memory block, the first code converter, first and second registers, fourth driver, second and third And elements, the second input of the third And element being the second clock input of the device, the second output the starting block is connected to the first input of the third element I, the output of which is connected to the input of the fourth driver, the output of which is connected to the control inputs of the second register and counter, the information input of the last is connected to the output of the first memory block, the address inputs of the group of low-order and group of high-order bits which are connected respectively with the outputs of the second and first registers. informational inputs are connected to the output of the first code converter, whose input is the informational input of the device, the control input of the first register is connected to the output of the second driver, the first and second inputs of the second element And are connected respectively to the output of the third driver and the second output of the second unit memory, the output of the second element And is connected to the input of the start block, the output of the first driver is connected to the counting input of the counter. 2. Device pop, 1, characterized in that the start-up unit contains the first and second triggers, the first and second switches and the OR element, the first input of which is connected to the first contact of the first switch, the second input is the input of the block, and the output is connected to the reset input of the second flip-flop, the direct and inverse outputs of which are the first and second outputs of the block, respectively; the clock input of the second flip-flop is connected to the direct output of the first flip-flop, the reset input and the setup input which is connected to the SECOND and third contacts of the second switch, the first contact of which is connected to the second contact of the first switch and the zero potential bus, the third contact of the first switch and the information input of the second trigger are connected to the single potential bus. ten And / a. 2