G - Physics – 06 – F
Patent
G - Physics
06
F
354/231
G06F 11/14 (2006.01) G06F 11/16 (2006.01) G06F 13/42 (2006.01)
Patent
CA 1323443
ABSTRACT A fault-tolerant digital data processor includes a peripheral device controller for communicating with one or more peripheral devices over a peripheral device bus having first and second input/output buses, each carrying data, address, control, and timing information. Each peripheral device includes a device interface for transferring information signals between the associated peripheral device and the peripheral bus. The peripheral device controller includes a strobe element connected with the first and second input/output buses for transmitting thereon duplicative, synchronous and simultaneous strobe signals. These strobe signals define successive timing intervals for information transfers along the peripheral bus. Information transfers are normally effected by the transmission of duplicate information signals synchronously and simultaneously on the first and second input/output buses. A transfer cycle element includes a scanner cycle element to determine an operational state of at least one of the peripheral devices connected to the peripheral bus; a command cycle element for executing a command cycle for controlling operation of an attached peripheral device; a read cycle element for effecting the transfer of data signals from the peripheral device to the input/output controller; and a write cycle element for transferring data signals from the input/output controller an attached peripheral device.
603407
Baty Kurt F.
Lamb Joseph M.
Long William L.
Wambach Robert F.
Riches Mckenzie & Herbert Llp
Stratus Computer Inc.
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