Boots – shoes – and leggings
Patent
1990-04-06
1995-05-09
Kriess, Kevin A.
Boots, shoes, and leggings
364DIG2, 36494081, 364937, 3649354, 364941, 3649418, G06F 1342
Patent
active
054148189
ABSTRACT:
The present invention provides a method and apparatus for dynamically modifying the priority of access to a bus, where the bus has control and arbitration functions distributed among the devices coupled to the bus, with each device having a fixed priority level. Access to the bus by particular devices is selectively inhibited, preventing them from asserting their fixed priority level. In a preferred embodiment, the present invention provides control over the reselection of a SCSI bus by a plurality of SCSI devices coupled to the bus by providing a pseudo busy signal to SCSI devices from which reselection is not desired. In this fashion, an initiator may issue a plurality of commands to the SCSI devices and control the order in which the devices will be serviced when ready. A plurality of pseudo busy circuits are provided, with one coupled to each device on the bus. Each pseudo busy circuit is controlled by a control signal from the initiator. The pseudo busy circuit intercepts the busy line of the SCSI bus and provides a pseudo busy signal to the busy line input of the device when instructed by the initiator; although this requires additional control lines in conjunction with the SCSI bus, it allows the use of standard peripherals connectors and controllers designed for the SCSI bus.
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Gajjar Kumar
Henson Larry P.
Idleman Thomas E.
Kriess Kevin A.
MTI Technology Corporation
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