Method and apparatus for increasing image generation speed on ra

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340724, 340747, 340799, 364518, G06F 314, G09G 536

Patent

active

049929615

ABSTRACT:
An image data generation circuit for a conventional raster display comprises a graphics systems processor and a standard video dynamic random access memory (VRAM) interconnected by an address translator circuit. The VRAM is connected to the raster display. The graphics system processor is preferably an off-the-shelf graphics system processor capable of drawing horizontal lines very quickly. This graphics system processor is configured to transpose raw data to achieve the same horizontal drawing speed while drawing in the vertical direction and feeds the resulting image data to the address translator circuit. The address translator circuit reconverts the image data for storage in the VRAM so that the image data can be accessed in a conventional manner to modulate the electron beam of the raster display. In one example, this results in an eight-fold increase in the update or refresh rate of the corresponding image on the raster display.

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