Video adapter with improved data pathing.

摘要

A video adapter includes a multichannel data path architecture which assists a host processor in communication with the frame buffer in order to increase the overall system performance. The architecture provides automatic frame buffer data path rearrangement depending on the pixel address and the host data interpretation. It utilises a minimum of shift registers, accumulators and control circuitry to provide the requisite storage, reconfiguration and frame buffer access functions. The architecture extends bit-blt conventional operations in order to provide high quality "antialiased" text and graphics in situ without the calculation of colours by the host processor. Finally, it assists the "burst" mode update of an arbitrary single plane of a frame buffer, which is especially important when high density chips are used for the frame buffer implementation.