Static information storage and retrieval – Magnetic bubbles – Guide structure
Patent
1994-04-04
1996-06-25
Lane, Jack A.
Static information storage and retrieval
Magnetic bubbles
Guide structure
365 49, 36518902, G11C 1500, G06F 1210
Patent
active
055308244
ABSTRACT:
A CAM/SRAM structure (42) performs address translations of variable length blocks, a "block address translator." Each address translation is stored in a register broken into an upper half and a lower half. The upper half contains CAM bit cells (56) which match an input effective address to a stored tag (BEPI) alternating with SRAM bit cells which store a block length tag (BL). The block length tag defines the length of the translated block and, hence, the number of bits which must match between the input effective address and the stored tag. The lower half contains SRAM bit cells which store a real address associated with the tag (BRPN) alternating with multiplexer circuits. In the event of a CAM match, each multiplexer circuit outputs either a real address bit or an input effective address bit, depending upon the block length tag. The two halves of each register are fabricated adjacent to each other in parallel rows to minimize routing requirements and reduce overall circuit capacitance.
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Peng Chih-Jiu
Rossbach Paul C.
Chastain Lee E.
Lane Jack A.
Motorola Inc.
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