Boots – shoes – and leggings
Patent
1989-11-13
1993-01-12
Anderson, Lawrence E.
Boots, shoes, and leggings
364DIG1, 364239, 3642843, 3642448, 395200, G06F 1300
Patent
active
051796651
ABSTRACT:
Updated images of messages are passed between asynchronous digital processors using dual port shared memory. In the basic form of the invention, three buffers in shared memory are assigned to each message. Where one of the processors is a controller for a data link channel carrying n messages, 2n+1 buffers are provided in free shared memory space with 2 buffers assigned to each message at all times and a common buffer serving as the third buffer for all of the messages. Where linked buffers in local memory of a controller processor receive message updates from a data highway, two buffers in shared memory are assigned to each message and a linked buffer in the controller local memory serves as the third buffer. The buffers containing the message updates are passed between processors by use of a buffer status array in shared memory. A semaphore lock in the array permits only one processor at a time to assign or release buffers.
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Reference Safety Analysis Report, vol. IV, (Resar 414), pp. 7i, 7.1-25 through 7.1-33 and FIGS. 7.1-13 and 7.1-14.
Crew Albert W.
Ghrist, III William D.
Remley Gilbert W.
Roslund Charles J.
Santoline Linda L.
Anderson Lawrence E.
Spadacene J. C.
Westinghouse Electric Corp.
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