SU506856A1 - Device for searching operands - Google Patents

Description

(54) DEVICE TO SEARCH FOR OPERANDS

The second and third inputs are connected to the output of the block; cooTiBencTiBeiHiHO with the single and zero outputs of the current trigger and the use of the operand, the fourth and fifth inputs of the boat are connected, respectively, to the single and zero outputs of the trigger trigger, the output circuit, and the output circuit, respectively, to the single and zero. and the third element / in “AND, single output trigger and termination”, the operand is connected to the Per | input of the fourth element “And, is the second input of which is connected to the output of the third element“ AND, the output is connected to zero input give the trigger for the counter and the trigger of the reference and to the control output of the device; the single input of the trigger of the reference is connected to the output of the second element I.

This makes it possible to reduce in the program the number of exchange commands with the operational command.

The drawing shows the scheme of the device being described, containing register 1 relative to the command address, trigger 2 of current operand usage, trigger 3 terminating and using operand, block 4 of tracing traces, single-channel channels for searching operands (two channels are shown in the drawing), including counters 5 and 62, triggers 6i and 62 are tangled in the counter,: blocks 7i, TZ, triggers 8i, 82, decryptors 9i, 92 states, and the elements lOi-13b 102-132.

The device also has the following inputs and outputs: start inputs 14i, 142 for searching operands, counting input 15, inputs 16, 17 of synchronization signals, input 18 of requests from the executive machine for block 1B, output 19 of the trace selection path selection, and outputs 20i of signal 202 use operands.

The device works as follows oi6pai30M.

When receiving the next command code from the pa: mi commands to the central control unit (DCC), the field codes of the relative address of the command, the sign of the current operand usage and the sign of the operand use expire are entered in register 1 and in triggers 2 and 3, respectively. block, the free search channel of the operand, assigns it to the current command and sets the address correspondence between the channel and the source of the operand.

The relative command address code is interpreted by the device as the source address of the operand used in the current command.

Odeo from trigger states 2, for example zero, informs the device that the operand whose address is specified in register 1 is used for the first time. Upon subsequent isprazovaniya this operand trigger 2 is set to one.

One of the 1 states of trigger 3, for example, a single one, indicates that the operand is terminated. When an operand is detected and this attribute is present, the operand search channel is released.

The signal from the central control unit at the input 14 "/ (of the search channel of operands, trigger 6 fixes the moment of its start and allows the counting pulses ico of the device input 15 to pass through the element" And 12 to the counter 5. The counting pulses go to the element "And 12 with the sampling frequency commands from the memory of commands at the control center and in the intervals of time from the moment of forming the address of the next command to the start of execution of this command. The increase in the number in counter 5 can occur with the same signals as the increase in the number in the machine command counter. etchika code register 5 with 1 m. e. the relative location command.

If there is a comparison signal at the output of block 7 under the condition of zero state of flip-flop 2 and flip-flop 8, which corresponds to the initial use of the operand, or under the condition of a single state of flip-flops 2 and 8, that cooTB-eTicTByeT is one of the subsequent I1 use of the operand, decoder 9 produces Operand detection signal. Thus, despite the fact that when a command is executed in a device, the simultaneous appearance of two comparison signals at the outputs of blocks 7 is possible, the operand detection signal is generated only: at the output of one search channel of the operand. When a request signal of the executive unit appears at the corresponding input 18 V

In the process of executing the current command, block 4 ustaea) inserts the exchange path and forms a sitnal at one of the outlets 19.

The control signals at the inputs 16 and 17 establish the necessary time sequence of operation of the elements.

The trigger 8 is set to one state by a signal from the output of the ' 11 element after the completion of the first search of the operand. In subsequent uses of this oneranda, the single state of trigger 8 is confirmed. In the zero state, the triggers 6 and 8 are set by the use completion signal of the operand from the output of the element "AND 10. The use termination signal

The operand arrives at output 20 of the device and informs the control center about the release of a certain channel.

The counter 5 is reset every time after the search for the operand is completed with a signal from the And 13 element.

Claims (1)

Invention Formula A device for searching operands containing a register of the relative address of the command, a block for fixing traces of the exchange, an output and the first input of which are connected respectively to the first input and output of the device, channels of the same type, each of which includes a counter, a comparison block, elements "And, the trigger trigger of the meter, the output of which is 1 connection to the first input of the AND element, the second input of which is connected to the second input of the device, the output is connected to the first input of the counter, the output of which is connected to the output of the register relative to the address of the Command, the Persians are the inputs of the second and third element "And connected icooTiBeTiCDBeHiHO with. the third and fourth inputs of the device, the output of the second element "AND of each channel is connected to the corresponding input-1M block for fixing the exchange traces, the output of the third element" AND is connected to the second INPUT of the counter, the single input of the trigger trigger is connected to the control input of the device, characterized in that , in order to improve speed, in "it introduced the trigger of the current use of the operation of the operator, the trigger of completion the operand is used and in each channel is the trigger of the reference, the fourth element is AND, the state decoder, the first input of which is connected to the output of the comparison unit, the second and third inputs are respectively with the unit and zero outputs of the current operand usage trigger, the fourth and fifth inputs are connected respectively to the single and zero outputs of the trigger trigger, the output of the state decoder is connected to the second inputs of the second and third elements "AND", the single 1 output of the operand use completion trigger is connected to the first input of the fourth element "AND, the second input of which is connected to the output of the third element" AND, the output is connected to the zero inputs of the trigger trigger of the counter and reference trigger and to the control output of the device, a single input trigger trigger connected to the output of the second element “I.