ocr: When in standard bit map mode, the color information is derived Fram the data stored in the video matrix, while the luminance information cames fram the attribute data. This allows for 2 colors to be independently selected in each 8 by 8 area. When the bit to be displayed is a '0', the color of the dot output is set by the lower 4 bits of the video matrix; the luminance is selected by bits 4-6 of attribute memnory. When a bit to be displayed is a '1', the color is set by the upper 4 bits of the video matrix; the luminance is set by bits G-2 of attribute memory. dot color source luminance sourc ...
