Information processor comprising a write buffer circuit containi

Details Information processor comprising a write buffer circuit containi Information processor comprising a write buffer circuit containi

1992-03-19

1995-04-04

Dixon, Joseph L.

Static information storage and retrieval

Magnetic bubbles

Guide structure

36518907, 364DIG1, 3642386, 3642407, 3649261, 3649336, 3649397, 3649576, G06F 1200, G06F 1300

Patent

active

054044804

ABSTRACT:
The invention assures data consistency at a time of data update. Also, the invention results in a reduction in the access time required to store incoming data. In response to an equality signal from a comparator circuit of a write buffer circuit which is then in an active level, data is immediately read out from a data buffer store having an address corresponding to the equality signal. A unidirectional tristate buffer is provided for temporarily disconnecting an address bus extending between a CPU and the write buffer circuit, again when such equality signal is in an active level. Similarly, a bidirectional tristate buffer is provided for temporarily disconnecting a data bus extending between the CPU and the write buffer circuit. At times a local controller may take over command of buffer storage of data, with an interrupt of the local controller if the central processor seizes command.

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patent: 5228134 (1993-07-01), MacWilliams et al.
patent: 5241631 (1993-08-01), Smith et al.
patent: 5253352 (1993-10-01), Olson

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