Static information storage and retrieval – Magnetic bubbles – Guide structure
Patent
1993-09-22
1996-12-17
Gossage, Glenn
Static information storage and retrieval
Magnetic bubbles
Guide structure
365 49, 3401462, G06F 1200, G06F 720, G11C 1500
Patent
active
055862888
ABSTRACT:
A memory interface chip with rapid search capability incorporates multiple registers to latch data from a memory under control of a microprocessor and to permit comparison of search strings and masking or special comparison characters provided by a processor with data from the memory. The memory interface chip includes a first register having a first plurality of storage locations for storing a target search string, and a second register having a second plurality of storage locations for receiving data in parallel from the memory. A plurality of comparators connected to the registers compares the search target string to data from the memory. Each column of comparators feeds forward a positive compare result from any comparator in the column to an AND gate receiving the output of the next sequential comparator in the next column of comparators, thereby allowing confirmation of the positive comparisons of the target string by the comparator columns. A positive compare of all bytes in the target string is created by a positive signal from the last AND gate in a cascade associated with the comparator column providing a positive compare of the last character of the target string. The memory interface chip may be provided with additional compare registers for skip, mask, wild card, or other special character inputs for special control of the compare string.
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Gossage Glenn
Hilevel Technology, Inc.
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