Content limit addressable memory

Details Content limit addressable memory Content limit addressable memory

1986-04-16

1996-10-01

Cawgialosi, Salvatore

Communications: directive radio wave systems and devices (e.g.,

Radar ew

Ecm

395427, G06F 702

Patent

active

055614299

ABSTRACT:
A content limit addressable memory (CLAM) having a plurality of lower and upper limits stored therein for comparison to corresponding subfields of an input word. Each corresponding upper and lower limit forms a bracket. Corresponding brackets form a window. The brackets correspond to the subfields and are of the same number of bits. The brackets and subfields are alterable in width to allow each bracket and subfield to have any number of bits in multiples of two. A valid match of the input word with any window can occur with any combination of the brackets of a window matching or not matching the corresponding subfields of the input word. A plurality of outputs corresponding to each of the windows indicates a match of the corresponding window to the input word. Additionally, the CLAM can compare data stored therein against an applied window with the matching operations as described above.

REFERENCES:
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patent: 4149239 (1979-04-01), Jenkins et al.
patent: 4217580 (1980-08-01), Lowenschuss
patent: 4374309 (1983-02-01), Bienvenu et al.
patent: 4547849 (1985-10-01), Louie et al.
"Window Addressable Memory", TRW, Jan. 1982, pp. 439-440, 3-1 to 3-13.
IBM Data Sheet, pp. 2-3.

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