| 摘要 |
An apparatus for rapidly updating a target display buffer memory from a source display buffer memory using a communication subsystem includes an element for associating a region number and an update indicator with each of a plurality of data-containing regions in the source display buffer memory. As display elements in the source display buffer memory are modified, the corresponding update indicator is modified. An update monitoring element periodically examines the update indicators of all regions. A transmitting element transmits the modified regions over the communication subsystem to corresponding regions within the target display buffer memory. The update indicators for the transmitted regions are further modified to indicate that the corresponding region of the source display buffer memory has been copied. According to another aspect of the invention, a configuring element is provided which dynamically defines the shape, size and configuration of the regions of the source display buffer memory to correspond to regions of arbitrary contiguity in the target display buffer memory so as to be suitable for text and graphics display applications.
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