Boots – shoes – and leggings
Patent
1977-06-06
1980-01-08
Shaw, Gareth D.
Boots, shoes, and leggings
G06F 1304
Patent
active
041830849
ABSTRACT:
A drive for a secondary storage facility that includes a controller and a drive bus that interconnects the controller and drive. Data is transferred between the drive and controller in serial fashion over a read/write data line. Control information, in the form of control messages, is transferred between the drive and the controller in serial fashion over two message lines of the drive bus. A message transfer is initiated by a strobing pulse from the controller and is controlled in response to clocking signals from the controller. During a transfer of a message to the drive, a controller-to-drive signal is asserted and conveyed to the drive. When the message has been completed, the controller-to-drive signal shifts to a non-asserted state and enables the drive to transmit back to the controller a status message under the control of clocking signals generated in the drive in response to the clocking signals from the controller that are returned to the controller over the strobing signal line.
REFERENCES:
patent: 3355718 (1967-11-01), Talarczyk
patent: 3437998 (1969-04-01), Bennett et al.
patent: 3525080 (1970-08-01), Couleur et al.
patent: 3629860 (1971-12-01), Capozzi
patent: 4047157 (1977-09-01), Jenkins
Digital Equipment Corporation
Heckler Thomas M.
Shaw Gareth D.
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