Legacy mode

About: Legacy mode is a research topic. Over the lifetime, 51 publications have been published within this topic receiving 693 citations. The topic is also known as: compatibility mode.

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.

Design Patterns for Wrapping Similar Legacy Systems with Common Service Interfaces

Abstract: Web Services are increasingly being used to create a wide range of distributed systems, many of which involve legacy software. Developing service interfaces for these legacy systems can be difficult, as for interoperability reasons it is advantageous to use a common service interface that is independent of the particular legacy system behind it. This enables other services to interoperate with like legacy systems regardless of their implementation. Unfortunately, similar legacy systems can offer subtly different functionality from each other, making agreeing on a common interface difficult. This paper introduces three design patterns for managing this problem: Lowest Common Denominator, Most Popular and Negotiated Interfaces. It formally presents these patterns and reflects on how they have been used within the domain of e-learning to wrap legacy systems that function as databases of objective questions.

Transforming a Legacy System into Components

Abstract: Most legacy systems are being pressured to continuously respond to changing requirements, but it is impossible almost to cope with these requests effectively. Because many legacy systems have suffered from lack of standardization and openness, difficulty of change, and absence of distributed architecture. Especially, according as legacy system has been deteriorating from an architectural point of view over the years, we must continually maintain these legacy systems at high cost for applying new technologies and extending their business requirements. For the purposes of transforming a legacy system into component system, we need systematic methodologies and concrete guidelines. Through these, we can share information at different levels of abstraction ranging from code to software architecture, and construct the component system with better component-based architecture. To achieve these goals, we have built upon the L2CBD (Legacy to Component Based Development) methodology providing reengineering process including concrete procedures, product-works, guidelines and considerations. We can transform legacy systems into new component system with improved software architecture by adapting L2CBD.

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 and system to detect packets of different formats in a wireless receiver

Abstract: A method and system for detecting packets of different formats in a receiver is disclosed. The method and system include initializing the receiver to be in a legacy mode; and receiving at least one data symbol by the receiver. The method and system include detecting if there is a high throughput (HT) signal field within a data packet and determining the format of the data packet based upon the detection of a HT signal field.