Importance

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Abstract

A facsimile system which produces variable resolution and size images on a reproduction medium is disclosed. A timing means produces two signals which control resolution in a first direction. The first signal controls release of pixels from a memory buffer to modulate the beam intensity of a cathode ray tube while the second signal controls the sweep in the first direction of the electron beam of the CRT. Resolution and size in a second direction is controlled by repeating lines of image data until the desired resolution is achieved. Hardware savings in the facsimile can be achieved by connecting a direct memory access controller to a graphics microprocessor through the host post of the graphics microprocessor and by using alternating banks of memory for storage of image data.

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First Claim