Industrial Technology Research Institute

Jiunn-Ming Ju

Lie-Der Lin

An converter apparatus to convert the (X, Y) coordinate of the two-dimensional screen position of a pixel to a linear address. The converter apparatus, which can be used with a variety of video displays of various resolutions including 1280.times.1024, 1152.times.900, 640.times.480, 1024.times.768, 1600.times.1280, and 800.times.600, contains three circuits in parallel disposition to receive and process various portions of the X and Y bits, and to output a Z-bit linear address. The first circuit mainly contains a multiplexer and it receives lower X bits as inputs; the second circuit contains a plurality of adders and multiplexers and a logical operation circuit, and it receives higher X bits and lower Y bits as inputs; and the third circuit mainly contains a multiplexer and it receives higher Y bits and at least a portion of the lower Y bits as inputs. The converter apparatus does not require a system CPU thus very high speed conversion can be achieved.

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Tainan Hsien, Taiwan

Jiunn-Ming Ju