Showing papers on "Legacy mode published in 2003"

Systems and methods for bimodal device virtualization of actual and idealized hardware-based devices

Abstract: Various embodiments of the present invention are directed to bimodal virtual device approaches (that is, “bimodal devices”). In certain embodiments, the bimodal device is a virtual device that is primarily based on a real piece of hardware to provide a broad degree of compatibility with software running in the guest environment (similar to the hardware device virtualization approach). However, to overcome the problem of poor performance that plague hardware virtual devices, these embodiments also provide an idealized “high-performance mode” that is not found in the original hardware-based device. Software drivers (and other software) developed for interacting with the original hardware device and which are unaware of (and unable to use) the high-performance mode will continue to use the “legacy mode” (hardware virtualization), while enhanced versions of guest software will be able to recognize and utilize the high-performance mode (idealized virtualization).

Software compatible parallel interface with bidirectional handshaking for serial peripherals

Abstract: High-speed reliable parallel data transmission between a computer and a parallel peripheral is provided by a peripheral controller by way of a virtual parallel UART (VPU). The VPU provides a novel parallel interface for higher speed parallel interface operation. The VPU is included in the peripheral controller along with a conventional RS-232 UART. The peripheral-side interface of the peripheral controller provides full bidirectional handshaking with the parallel peripheral. The host-side interface of the peripheral controller provides a legacy serial port compatible interface. Mode information selectively configures operation in either a VPU (parallel) or a UART (serial) mode. Both modes appear identical to software executing on the computer, enabling the use of standard serial I/O drivers without modification, and providing transparent legacy mode compatibility even when the hardware is configured for VPU mode.

Convertible single-turn to multi-turn gaming steering wheel

Abstract: Embodiments of the present invention are directed to systems and methods for operating a gaming wheel system including a steering wheel which may be a single-turn wheel (at most 360° lock-to-lock) or a multi-turn wheel (more than 360° lock-to-lock) to play a game which may be designed for a single-turn wheel (a legacy game) or a multi-turn wheel (a native game, irrespective of whether it takes advantage of the multi-turn capability or not). The system is configured to operate the gaming wheel system in one of four states. The first state is the single-turn, legacy mode state for operating either a single-turn wheel or a multi-turn wheel in the single-turn mode to play a legacy game. The second state is the multi-turn, legacy mode state for operating a multi-turn wheel in the multi-turn mode to play a legacy game. The third state is the single-turn, native mode state for operating either a single-turn wheel or a multi-turn wheel in the single-turn mode to play a native game. The fourth state is the multi-turn, native mode state for operating a multi-turn wheel in the multi-turn mode to play a native game.

Method to support legacy and native mode interrupts with multiplexed execution of legacy and native interrupt service

Abstract: A processing system and method for servicing legacy type hardware interrupt requests (“IRQs”) and native type hardware IRQs. A processor receives a legacy type hardware IRQ during a native mode runtime of the processor. In response, the processor services the legacy type hardware IRQ received during the native mode runtime. The native mode runtime is a higher performance state of the processor than a legacy mode runtime of the processor defined by a number of bits processed in parallel.