Date:  April 16, 1993                 X3T9.2/93-071 Rev 0


         To:  X3T9.2 Committee (SCSI)

         From:  George Penokie (IBM)

         Subject:  Isochronous Queue Tag

         Serial Bus Protocol requires a new queue tag to deal with
         Isochronous tasks.  Isochronous tasks have a defined set of
         rules for fetching the tasks and for streaming data that do
         not follow any of the current task control rules.

         The definition of the Isochronous task would be as follows:

         Isochronous Task (Isochronous Tag)

         An Isochronous Task is one that is tagged with a Isochronous
         Queue Tag.  Any Isochronous Task may become a Current I/O
         Process at any time.