SU1495805A1 - Microcomputer and computer interface unit - Google Patents

Abstract

The invention relates to computing and can be used for input-output information in automated information and control systems. The purpose of the invention is to reduce the amount of equipment of the device. The device contains the first matching element 2, the first bus driver 3, the second matching element 5, the decoder 6, the comparison element 7, the first element 8, the address selector 9, the second bus driver 11, the second element 12, the pulse generator 13, switch 14, the third, fourth, fifth elements AND 16 - 18. The device carries out the output of information from the computer to the indicators of the calculator and the reception of information in the computer by pressing the keys of the calculator. 1 п.ф. 7 il.

Description

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The invention relates to computer technology and a maket to be used for input-output information in automated systems and control systems.

The purpose of the invention is to reduce the volume of the holding device; FIG. I, image 1a is structural

The diagram of the device, in FIG. 2, the algorithm of the operation of a computer when implementing a mode on Zigga 3 is a timing diagram of the operation of the device n) and: by entering a digit, b: and figs, 4 and 5, respectively, and g; COMPUTER when displaying the value of one bit of the register of indication of micros; alysulcator and temporal d, iagra1M, illustrating the processes taking place; FIGS. 6 and 7, respectively, the computer algorithm that performs the identification, and the time diagam, illustrating the processes occurring therewith.

The device contained; aa-1crocalulator 1 J, first element;: nt 2 matching, first shaper driver 3, device output 4 yes: connected to the nepBOyry input of the dannyh computer; the second element 5 is the matching j decoder 6., the element 7 compare the first element I-8, the collector 9 addresses the input 10 device for sub-slides to the address output of the computer. second shi gash for- NMpOBaTejib 11, second eleG: ent and (2, shaper 13 pulsesj switch 14. output if) of the device for directing to the third computer data input, third, fourth 5, fifth elements AND 16 - 18 groups of inputs of the 19th device for connecting the first data output of the computer, v :: move 20 of devices for subrouting the second v; move 21 of this 1 ı 1 x computer, output 22 of the device for connecting to the interrupt input of the computer, inputs 23 and 24 of the device for connecting: kg outputs and, respectively, of the bits and segments of the microcalculator, the input (output 25 of the device for connecting the ode) the output of the columns of the key of the Mt atrium:

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The operation of the device is based on the specific features of the functioning of the standard microcalculator 1, for example, Electronics-MK-41, the second class has three cHCTBivb tires: output bus no. 1 of segments 23 and bits 2 t and bi-right 805

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Lennuyu bus 25 columns keyboard. Register display; indication is carried out in M1crocalculator 1 according to the method of temporary compaction of segment 23 bus. At the same time, a scanning sequence of pulses, each of which is fed to the grid of a certain familiarity of the luminescent indicator, is continuously generated on the bus of bits 24. The anodes of the indicator are made in the form of a set of segments of the fire; 1: the characters, Anodes of the same name of all HK;: - comest in the type. -microcalculator I is unified and connected to the bus of segments 23. Micjournal 1, on the bus of segments 23 sequentially, synchronously with the pulses on the bus of bits 24, the microcalculator 1 generates the character codes for the c. As a result, the contents of the pc- are displayed. Micro Calculator Indication Gistra, Multiply1 About the key M1-1 Crocalculator 1 are combined into a rectangular matrix, the rows of which are connected to the bus 24 bits; Crocalculator 1, and the columns - with the input bus 25 of the old, the keys of the keyboard are as The set of 1S of the indicator is sequentially excited by pulses from the 24-bit bus, Pressing any of the microchalters 1 results in a line of 5X on the corresponding this key} 25X 25 columns of the corresponding pulse keypad. Thus, the micro-calculator 1 obtains information about the numbers of the column and row of the matrix of the keyboard, at the intersection of which is a key.

The device operates in three modes. In the Input mode, information is output from the computer to the registers; the calculator's calculator; In the Output mode, information is output from the display register of the calculator 1 in the computer; In the Identification mode, the computer is directly identified by pressing the key mi kr about akkul a,

In Input mode, the device works as the next icon.

The input of the t-shla is disassembled into stages, each of which is used to enter the next digit, which is the value of the current digit of the number, starting with the highest one, the accepted year of input consists in simulating the keystroke corresponding to the entered digits. In this case, the computer should issue codes 21 and 19, respectively, row numbers and column numbers; at the intersection of which a key is located, pressing which is simulated, and on bus 10 — the code of the device number with which

the exchange is made. After that, the computer should begin to interrogate line 15, the appearance of a signal on which signals the end of the input. Figure 2 shows the sequence of actions that the computer must perform when drying, entering the Input mode. Figure 3 shows the time diagram of the device operation when entering a number, the key of which is located at the intersection of column K1 and line 6. that, on the line K1 of that information input / output device, whose address is set on line 10, there are pulses of discharge 6, i.e. There is a hardware simulation of pressing the corresponding key. After entering the computer should prohibit the passage of pulses through the circuit 16 18, giving, for example, the bus 000 code 000.

In the Output mode, the output of the contents of the register of the indication of the microcalculator 1 is also divided into stages, each of which produces the output of the code of the next digit of the display register. Since the display of information in the microcalculator 1 is carried out according to the time compaction method, on the bus 4 of the device sequentially in time, in accordance with the number of the current bit, the output codes of the current bits of the display register will appear on the output of the decoder 6. An external device, such as a computer, first loads the bus 10 with the address of the device with which it is exchanged, and bus 21, the bit number of the display register, the value of which is output at this stage, must continuously poll bus 15. Receiving a signal on bus 15 informs the external device That bus 4 now contains the code of the value of the required bit of the display register. At this point, the external device should read and remember the contents of the bus 4.

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Figs. 4 and 5 show, respectively, the sequence of actions of the external device exchanging, in outputting the value of one bit of the register of the indication of the micro-calculator 1 and the timing diagram illustrating the processors passing through,

In the Identification mode, the device operates as follows.

If no key is pressed in the cycrocalculator, there are no pulses on the lines of the K11, K21, K21 keyboard columns, and consequently, on the bus 20. The external device, having carried out identification, should, first, determine the number of the line in bus 20 on which there are pulses, and, second, determine which discharge these pulses belong to. The sequence of actions of the external device performing the identification is shown in (6) 6, and the timing diagram, where the location is, is shown in Fig. 7,

 the invention

A device for interfacing a micro calculator with a computer, comprising a first, second matching elements, a decoder, a comparison element, a first bus MJIPO driver and a switch, the inputs of the first and second matching elements being connected to the inputs of the device for connecting the bit outputs and segments of the micro calculator, outputs the first, second matching elements are connected respectively to the information input of the first bus driver and to the input of the decoder; the output of the first bus driver is connected to the output of the for connecting to the first data input of a computer, characterized in that, in order to reduce the amount of equipment, an address selector, a pulse shaper, a second bus driver, and the first to fifth elements And are entered, and the address selector input is connected to the device input for connecting the address output of the computer, the output of the address selector is connected to the resolution inputs of the first and second bus drivers and the first inputs of the first and second elements AND, the first input of the switch is underneath to the bus of the switch: zero across 7149580 five

device;; the second input of the switch is connected to the input of the pulse generator, the output of which is connected to the second input of the second element AND whose output is connected to the output of the device for: connecting the computer to the input of the interrupt of the second bus driver connected to the output of the device - Q of the computer's data input, a group of device inputs for connecting the first computer data output is connected to the first electrical inputs of the third, fourth, fifth And elements, the second inputs of which are 15

connected to the output of the first element AND to the output of the device for connection to the third data input of the computer; the device input for connecting the second output of the data to the X computer is connected to the first input-1 of the reference element, the second input and the output of which is connected respectively to the output of the decoder the second input of the first element And, the outputs of the elements And from the third to the fifth are connected with the information input of the second bus driver and with the input-output of the device for connection to the input-output of the columns KJI aa atora NM k rokal akul t o r a,

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Claims (1)

Claim A device for interfacing a calculator with a computer containing the first, second matching elements, a decoder, a comparison element, a first bus driver and a switch, the inputs of the first, second matching elements being connected to the inputs of the device for connecting the outputs of the discharges and segments of the calculator, the outputs of the first, second elements coordination are connected respectively with the information input of the first bus driver and with the input of the decoder, the output of the first bus driver is connected to the output of the device equipment for connecting to the first input of computer data, characterized in that, in order to reduce the amount of equipment, an address selector, a pulse shaper, a second bus shaper and first to fifth AND elements are introduced into it, the input of the address selector being connected to the input of the device for connecting address output of the computer, the output of the address selector is connected to the resolution inputs of the first, second bus drivers and to the first inputs of the first, second AND elements, the first input of the switch is connected to the bus of the zero potential switch la apparatus ,, the second input switch is connected to the input of the pulse shaper whose output is coupled to a second input of the second _element; I ment, the output of which is connected to the output of the device for connecting to the computer interrupt input, the output of the second bus driver is connected to the output of the device for connecting the second j computer data input, the group of device inputs for connecting the first output And, with the output of the device for connecting to the third input of the computer data, the input of the device for connecting the second output of the computer data is connected to the first input of the comparison element, the second input and output of which is connected respectively to the output of the decoder and the second input of the first element And, the outputs of the elements And from the third to the fifth are connected to the information input of the second bus driver of the data path; the computer is connected to the first inputs of the third, fourth, fifth elements And, the second inputs of which are connected to the output of the first element and to the input-output of the device for connecting to the input- column output 15 keyboard microcalculator. {start) j Issue the line number code to bus 21. Issue the bus number code on the bus 19 \, ΞΖΞΤΞΖ ^ Issue on the bus Yu [device address code Count bus signal 15 Get the date on the bus S ~ mets) FIG. 2 Fig.Z I 4 95805 Fi /, to ζStart) Tired & l * on 1may ZltoS nopera 3 paipaia The fact of the fact tyuhopp £ ! JtoKMwr * / I l “L '< ^{11 1} “' ** SdO g Meyerization of the knife of the clavicle / and located at the intersection echelstvo _r j} _u drop r?