SU625248A1 - Permanent storage - Google Patents

Description

The invention relates to computing and can be used in 1F-1X computers.

Permanent memory devices are known for storing values of logical functions, however, these devices are not very effective in terms of memory capacity when implementing logical functions over multi-bit operands l J.

The closest technical solution to the invention is a permanent memory for storing logical functions containing a function code register connected via a decoder to a drive, operand registers, and result register 2. This device has low reliability.

The aim of the invention is to increase the reliability of the device.

This is achieved by the fact that the device contains additional decoders and AND-OR elements, whose inputs are connected to the drive outputs and the corresponding outputs of additional decoders, and the outputs of the AND-OR elements are connected to the results of the result register, the inputs of additional decoders are connected to the corresponding outputs of the register operands.

The drawing shows a functional block diagram of a persistent storage device.

The device contains the function code register 1, address decoder 2 and drive 3, operand registers 4, 5, ..., 6, additional decoders 7 and AND-OR elements 8 and result register 9. The outputs of function code 1 register are connected via address decoder 2 to accumulator drives 3. Outputs of the higher (nth) bits of the registers of operands 4, 5 ,. . ., 6 are connected to the inputs of additional decoders 7, the outputs of the (P - 21) -th bits of the registers of the operands 4, 5j. . ., 6 are connected to the ports of the next additional descrambler. The outputs of each additional decoder are connected to the first passes of the Vl-OR 8 element, the second of which is connected to the outputs of drive 3. -. . The outputs of the elements AND-OR 8 are connected to the inputs of the result register 9, the device operates as follows. The function code register 1 receives the code of the function function that needs to be implemented over the GP P - bit operations (bj, Lj are written respectively in the registers of the operands 4, 5 ,., ,, 6, The drive 3 stores the values of K logical functions | &; tions defined for all 2 possible sets (fJ, a; HJ of one-bit variables. According to the code of the logic function from accumulator 3, the 2-bit value of the corresponding function KOTODoe is received on the inputs of all A-8 alements. At the outputs of additional decoders 7 potential equal to logs According to the values of the bits of the operands received at the inputs of the decoders, these potentials open the corresponding element in the AND-41LI elements 8 and the output of the AND-OR elements produces the values of the logic function for the specified operand values that are written to the result register 9 Applying persistent storage to implement logical

one

1 functions are promising, since the construction and minimization of logical equations of function, is not required. An invented memory device for storing logical functions comprising a function code register, connected via a decoder to the accumulator, operand registers and a result register, characterized in that, in order to increase the reliability of the device, it contains optional descramblers and I-41LI elements, the inputs of which are connected to the corresponding outputs of the additional decoders and the accumulator, the outputs of the AND-OR elements are connected to the inputs of the result register, the inputs of the additional decoders are connected to tvetstvuyuschimi register output op avdov. Sources of information taken into account in the examination: 1. Author's certificate of the USSR., № 378959, cl. G11 C 17 / OO, 12.03.71. 2. USSR Author's Certificate Qll С 17/00. No. 494768, cl. 07/18/74.