Static information storage and retrieval – Magnetic bubbles – Guide structure
Patent
1993-06-28
1995-03-07
Harvey, Jack B.
Static information storage and retrieval
Magnetic bubbles
Guide structure
395425, 36523002, 36523006, 36523008, 3652385, G06F 1200, G06F 1204, G11C 800
Patent
active
053966082
ABSTRACT:
A method and apparatus for addressing a memory space as a row and column matrix so as to allow the single matrix to store data of various widths, e.g., 16, 32 and 48-bits, with a minimum of wasted memory space. A specified number of the LSBs of the address are used to select a row in the matrix, while the remaining MSBs are used to select a columnar portion. Additional bits indicate the length of the data selected. The MSBs of the address and the additional bits indicating the length of the word accessed are used as inputs to a combinational logic circuit, the outputs of which are coupled to control switches for activating only the appropriate columnar portion of the matrix. Thus, although the LSBs of the address used to select the row activate every bit in that row, the switches are controlled so as to connect to the bus only the bits in that row corresponding to the selected columnar portion.
REFERENCES:
patent: 4523276 (1985-06-01), Maejima et al.
patent: 4675849 (1987-06-01), Kinoshita
patent: 4797813 (1989-01-01), Igarashi
patent: 4994962 (1991-02-01), Mageau et al.
patent: 5305281 (1994-04-01), Lubeck
Analog Devices Inc.
Harvey Jack B.
Whitfield Michael A.
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