Extra Half-bright. The Amiga's HAM mode was even stranger. 6 bits per pixel, but the first two bits were for control: 00 meant the other four bits would referen

Extra Half-bright. The Amiga's HAM mode was even stranger. 6 bits per pixel, but the first two bits were for control: 00 meant the other four bits would reference a standard 16-colour palette, but any other value would cause the pixel to take on the value of the previous pixel, modifying either the red, green, or blue component (depending on the two control bits). Total of 4096 expressible colours. Great for photographs, not much use for anything else.