Abstract: A multi-boundary address protection range is provided to prevent key operations from interfering with a data move performed by a dynamic memory relocation (DMR) move operation. Any key operation address that is within the move boundary address range gets rejected back to the hypervisor. Further, logic exists across a set of parallel slices to synchronize the DMR move operation as it crosses a protected boundary address range.

Abstract: A multi-boundary address protection range is provided to prevent key operations from interfering with a data move performed by a dynamic memory relocation (DMR) move operation. Any key operation address that is within the move boundary address range gets rejected back to the hypervisor. Further, logic exists across a set of parallel slices to synchronize the DMR move operation as it crosses a protected boundary address range.

Abstract: A processing facility is provided for simultaneously receiving multiple streams of digital audio data and based thereon concurrently outputting both an unmixed digital audio signal and a mixed digital audio signal. The processing facility can be implemented, for example, within an audio decoder of a set top box. The facility includes receiving a first stream of digital audio data and a second stream of digital audio data, and outputting the first stream of digital audio data as an unmixed digital audio signal. Simultaneous therewith, the first stream of digital audio data and the second stream of digital audio data are digitally mixed and outputted as a mixed digital audio signal. If necessary, the second stream of digital audio data is redigitized based on a sample frequency of the first stream of digital audio data, and either or both the first stream and second stream of digital audio data are decoded prior to mixing.

Abstract: A pair of ribbon spools are independently operated by respective motors to rotate in one direction until the ribbon end and then in the opposite direction, and so forth. Spools alternately function as feed and take-up spools and motors as a drive and drag motors, respectively To eliminate excess drag motor cogging, a ribbon tension control system uses dynamic braking of the drag motor, and includes drag circuitry with rectifier bridge circuitry and a constant current sink settable for drawing predefined selectable levels of current from the windings of the drag motor. The motors are polyphase, permanent magnet, stepper motors which, when turned by the ribbon, generate alternating back emf signals in their windings. A full-wave rectifier bridge is connected to each winding of the drag motor with bridge outputs connected to a common sink which is an emitter follower circuit whose current level is set and maintained by an operational amplifier.