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Getting (x,y) coords from offset in screen

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Remember old mode13h ? where: offset = 320*y + x, so vga_addr + offset points to (x,y) pixel, knowing the offset, its possible to get the x and y coordinates corresponding this offset ? I have tried: k1 = k2*y + x x = k1 - k2*y y = (k1 - x)/k2 but x depends of y and y of x :(

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y = offset / 320; // Integer division.
x = offset % 320; // Remainder.

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