SU678487A1 - Electronic keyboard computer - Google Patents

Description

one

The invention relates to the field of computer technology and, in particular, to electronic keyboard computing machines designed to perform a wide range of planning, economic, and accounting and static calculations in all areas of the national economy.

Electronic keyboard computers (ECMs) are known for performing planning, accounting, static and scientific calculations of C.

In well-known PCs, indicator devices are used as output devices on which input information and calculation results are displayed.

But the indicator output devices DO NOT ALLOW to permanently fix the operands, the results of calculations, and document the progress of the calculations.

An electronic computer with a printing device is also known, which contains an input device connected to a synchronization device and an operational device that contains dynamic type registers with the storage of digital information, the number, in them.

representing the position of the comma and the operation code, a buffer register for storing the printed information, the outputs of which are connected to the inputs of the comparison circuit, the other inputs of which are connected to the outputs of the counter of the SYMBOLS; a cycle counter connected to the control unit, a printing point counter comma connected to the outputs of the operating mode circuit, the inputs of which are connected to the outputs of the buffer register, and the OUTPUTS of the counter connected to the inputs of the elements AND of the control of printing the columns also connected to the outputs of triggering the formation of a print pulse, the inputs of which are connected to the outputs of the comparison circuit and the synchronization device; The element outputs of the control and printing of columns are connected to the gates of transistors, controlling the operation of amplifiers of a printing device electromagnets, made on elements such as thyristors and dynistors, which form print signals of a certain duration and power to ensure the normal operation of printing electromagnets

HAMMERS.

Availability in operational registers

the position code of the comma increases the size of the registers and, consequently, increases the hardware of the operating device and the synchronization device.

Availability of special cxeNM counter

DL of determining the place of printing of the commander, with the xervCJ mode of operation of the estimator, the wound of the x-14 print management

CTonSupl e At the ryo w u ji

 - STRAWMAGNYTOV complicates the structure of the machine and increases the equipment.

The aim of the invention is to reduce the equipment and simplify the structure of the PC by eliminating

In order to determine the place of printing of a comma, mode of operation

We will have tips on all the printing columns, triggers form: impulse printing, simplify

circuits of amplifiers of electromagnets, reducing the operational equipment

tegt € fТ1рс5й ст в а.

This goal is indicated by the fact that the ECMM contains a shift register,

the trigger of the comma, the trigger of the delay, and the elements AND, the first and the second input of the trigger T, are combined, respectively, with the fourth output of the synchronization device and the third output of the input device, and the first and second outputs are with the first inputs of the first and second elements, respectively,

the second inputs of which are connected; the output of the comparator output, the outputs of the first element And the delay trigger are connected to the first input of the shift register, the second input and the group you connected to the second output of the control device and the group of inputs of the device: Print; the outputs of the second and third elements I are connected to the first input of the delay trigger, the second INPUT of which is connected to the fifth output of the synchronization unit, the group nai of the outputs of which is connected to the / group of inputs of the Input Device, the third output of which is connected to the first input of the third element I, second C T1ZHZDKShSh 6rBH is combined with one output of the character position counter.

  T Mafig-. Gyryv eDyona prodagaagaema

The bushes in FIG. 2 - time diagram, mma operation of the device synchronization-c, | „---- - - - - ---- The machine contains the device 1 wr-J yes, the device 2 is synchronized, the device is 3, the right, opera- tional: device 4, memory device 5, buffer register 6, comparison device 7, character position counter 8, print cycle counter 9, trigger 10 p6l6zhShy zapyy7 §I lAnts I11-13, delay trigger 14, shift 15 registrar , device 16 parallel type furnaces, input 17 m; tires, tires. Connecting devices

8.487

machines: a bus 18 connecting one of the outputs of the printing device to the inputs of the character position counter and the print cycle counter; a bus 19 connecting one of the outputs of the printing device with an input of a character position counter; a bus 20 connecting one of the outputs of the character position counter of the AND circuit 12.

The input device 1 is designed to record information in operational

10, the registers of the operating device 4 and the start; the control device 3 for performing the corresponding operation, and also the generation of the sync pulse of the decimal place 5 with the help of the position switch comma.

The synchronization device 2 generates a sequence of pulses controlling the operation of all the devices of the machine, as well as those serving to address information stored in the registers of the operation unit 4, the device 5 of the memory, the buffer register b. The control unit .3 generates signals of micro-instructions executed in the input device 1, the operation device 4 for implementing the operation algorithms, as well as during the printing operation.

The device 4 operating provides the performance of operations on operands stored in operational registers and the transfer of information or to the device 5 of the memory in the buffer register 6.

The memory device 5 provides storage of constants, results of intermediate calculations, accumulation of operands and results.

Buffer register 6 provides storage of digital information (which is to be printed).

Comparison device 7 is intended for comparing information in buffer register 6 with the counting state of 8 character positions. The counter 8 character positions is intended to determine the characters to be printed at a given position of the symbol drum of the printing apparatus 1.

A print cyclo 9 counter is designed to count printed positions and generate a print command end signal in control device 3.

The trigger 10 of the comma starts the timing of the formation of the sync pulse of the position of the decimal commenter in the input device 1 in each Cycle of the operation of the synchronization device 2.

. Element And 11 is designed to record on the trigger 14 pulse delay from the output of the device 7 comparison. Element And 12 is intended for recording the trigger delay of the clock pulse of the decimal point. Element And 13 is intended for recording into the pulse shift register 15 from the output of the comparator device. A delay trigger 14 provides a tetrad delay when writing an impulse from the output of the comparison device to the shift register. Shift register 15 provides a time distribution of pulses from the output of the comparator to control in the printing device 16 the printing of the columns. The printing device 16 of the parallel type is intended for printing on the paper tape operands and the results of the calculations. The printing device has a drum marked on it with rows of symbols and a series of printing hammers controlled by electromagnets. Amount of mo can vary depending on the spacing of the printed information. ECM works as follows. By pressing the numeric keys in the input device 1, a four-bit code is formed and a sign of pressing the numeric key that starts the device, 3 controls, to implement the operation of entering a digit from the input device to the register of the operating device 4. the buffer register 6 by pressing the comma-key in the input device forms a sign of the comma-key press, which is necessary for distinguishing the input of the integer and fractional parts of a number. The code of a comma in the register of the operating device is not written. The information in the registers of the operating device 4, the buffer register B, circulates synchronously with the pulses of the decimal digits flj generated in the synchronization device 2. To indicate the location of the comma, the sync pulses of the decimal bits D are fed to the inputs of the commanding switch in the input device, at the output of which a sync pulse of the comma is formed that is synchronous with one of the pulses. . For example, if the number has three similar bits, then the pulse D will be synchronized with the pulse D 3. By pressing the operating key in the input device, a four-bit course of operation and a sign of pressing the operating key are formed. The operation code in the register of the operating device 4 is not written, but starts up the control device 3 to implement the corresponding operation. At the end of the operation, the control device 76 generates a command for printing information recorded in the buffer register 6. The printing device 16 generates two sequences of pulses C 1, C 2 through output buses 18, 19. C 1 pulse indicates the starting point of the character positions character drum. Impulses SI 2 accompany each character position. To determine the position of each character, an 8 character position counter is used, controlled by pulses SI 1, SI 2 and counting in continuous mode. In the counter circuit, there is an output, at which a pulse appears at the moment when the counter state corresponds to the position of the drift on the simol drum (bus 20). The output of the character position counter is connected to the input of the comparison device. In the comparator, the serial code from the output of the buffer register 6 is converted into a parallel four-bit one, and the code of each register bit is compared with the state of the character position counter, and if they coincide at the output of the ycTpoticTBa comparison, a pulse is generated. In one cycle of operation of the synchronization device 2, all the information of the buffer register will be analyzed and at the output of the comparator a sequence of pulses is formed that are synchronous with the pulses of the decimal bits D. The presence of a pulse in this decimal place at the output of the comparator means that a symbol should be printed in the column of the printing device 16 corresponding to the given digit of the number. From the output of the devices. In comparison, the pulses arrive through the elements AND 11, 13 to the input of the shift register 15. Until the control unit issues a print command, no write to the shift register occurs and there is no print. At the command of the print, the control unit generates a series of write pulses Tzregister shift in such a way that in the period between the pulses of SI 2, one series of pulses of recording. The number of pulses in a series may vary depending on the width of the printed information and, accordingly, the size of the shift register. And at each moment, one pulse of the recording Tj is accumulated. Consider an example of printing the number 765, 555. In the buffer register 6, the number is located as follows: D1D2DZD4D5D6 D 7 D 16 D 1 D 25555 6 7

In this example 3, the number is printed so that the com must appear in the fourth column (765, 555).

The comparator will generate the output pulses as follows.

7. L-When the character position counter is set to the state, then at the output of the comparison device, the pulses are applied to TC at times D 1, D 2, D 3, D 4.

Element And 13 is open with a high potential from the inverse output of the trigger position of the comma and at times D 1, D 2, D 3, the output pulses of the device are compared and written into the shift register 15. At the end of the time D 3, the trigger 10 position of the comma will be set on input S to one state. Element And 13 is locked, but Element 11 is opened and at time D 4 the pulse from the output of the comparator is written to the delay trigger, with which it is delayed by one decimal place. Therefore, at the output of the delay trigger, a pulse is measured at the end of time D 4, and in shift register 15, OH is written at time D 5, i.e. linger on the tetrad. Thus, at time D 4, there will be no records, and the fourth bit of the shift register turns out to be (free when printing in the first, second, third, and fifth columns.

At the moment of time D5 to D16 at the output of the comparator 7, no pulses are generated.

At the beginning of the new cycle of operation of the synchronization device 2, the trigger position of comma 10 will be reset. Upon the arrival of the next impulse SI 2, the counter 8 character positions will be set to state 6 and the output of the comparator will generate a pulse at time D 5. Since by this time the trigger of the position of the com- pant will be set to one in D, then this impulse And 11 is written on the delay trigger and enters the shift register at the moment D 6. The symbol b print: is in the sixth column.

Similarly, the character 7t e of the seventh column will be printed.

When the character position counter is set to the state corresponding to the position of the commanding on the character drum, a bus appears on bus 20, the duration of which is equal to the period of impulse SI 2. At this impulse, at time P {-D 3, impulse D is recorded , on the trigger delay, and the next pulse T) at time D 4 in regist b shift. Therefore, the comp is printed in the fourth column.

eight

Since one series of pulses Tj is generated between the pulses of SI 2, at the end of the Tu series, the recording and shifting of information in the shift register is stopped and the shift register bits in which printing is to be completed are filled. This state of the shift register will be maintained until the arrival of the new CI pulse 2, which provides the necessary length of the input pulses of the shift register for the normal operation of the printing press electromagnets 16.

After the arrival of the new impulse of the SI 2, this information will be replaced by a new

In order to start printing from any position, a printing cycle counter is used in the machine circuit. When a print command is generated in the control unit, the cycle counter begins to count the number of printed positions (by SI pulses 2) and determines the time when the print is finished. By the impulse of the end of printing, the control unit switches to a new mode of operation. The same impulse controls the mechanism of pulling the paper tape in the printing device.

Thus, excluding the position code of the comma from the operational register, the special printing counter of the comma with the operation mode diagrams and the set of valve circuits to control the printing of the columns and the inclusion in the ECM circuit of the trigger of the trigger of the delay register, the shift register reduces the equipment and simplify the structure of the machine.

Claims (2)

1. Baburin A.A. et al., Operation and Maintenance of Electric Keyboard Computing Machines, M., Statistics, 1973. 2.UK patent number 1343440 cl. B 41 J 5/44.