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Multi-dimensional Drive

IP.com Disclosure Number: IPCOM000097052D
Original Publication Date: 1962-Apr-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 67K

Publishing Venue

IBM

Related People

Fugere, DG: AUTHOR [+2]

Abstract

Increasing the selection ratio and speed of magnetic core matrix memories is realized by providing redundant sets of selection windings. The circuit employs one redundant drive set wired along the diagonals of the memory. Activation of one of the diagonal windings D, with the X and Y windings, produces a drive of three units at a selected core, while maintaining a maximum drive of only one unit at any non-selected core.

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Multi-dimensional Drive

Increasing the selection ratio and speed of magnetic core matrix memories is realized by providing redundant sets of selection windings. The circuit employs one redundant drive set wired along the diagonals of the memory. Activation of one of the diagonal windings D, with the X and Y windings, produces a drive of three units at a selected core, while maintaining a maximum drive of only one unit at any non-selected core.

Selection of the proper diagonal winding for any combination of X and Y windings is accomplished by summing the X and Y addresses. The addresses assigned to the diagonal windings are arranged to represent, in the upper left diagonal half of the matrix, the sum of the addresses of the X and Y windings which intersect the same cores.

In the lower right portion, the addresses of the diagonal windings represent the sum of the X and Y addresses minus a constant k, which is equal to the number of addresses in each dimension.

For core positions in the upper left portion, the true sum of the X and Y addresses is used. For the core positions in the other half, the true sum minus k identifies the proper diagonal winding.

If k is made equal to a radix R raised to any power, identification of the proper diagonal winding for a selected core position in the lower right half is accomplished by adding the X and Y addresses according to the radix R and disregarding the final carry. For example, in the matrix shown, k = 2/3/, so addition is...