METHOD FOR STORING DECODED MULTI-COLOR DIGITAL IMAGE BIT MAP IN RAM TO DISPLAY

摘要

PROBLEM TO BE SOLVED: To provide a color display bit map whose memory bandwidth is minimum and to increase the number of color selections, maintaining the minimum bit map size requirement. SOLUTION: A bit map is stored in a line that corresponds to a horizontal line of pixels. Each line has a color reference table (8 bytes here) of a line base and each pixel (90 bytes for 720 pixels) or a set of pixels. Two pixels share the same color to reduce the size of the bit map. Two bytes of the eight bytes of the color reference table are a control field. The number of total bytes of the bit map is, in the case of 80 lines, 98×80×6=47040.