An
interlaced display type capable of some
ugly,
ugly color combinations. Designers had to choose between a
palette of either:
or
Of course, Black could be used in either palette, as it is merely an absence of color.
With some hacking of the video registers, it was possible to combine the palettes, using Red, Cyan, White and Black. However, this type of hacking was also subject to destroy the monitor -- sending random bytes to the video registers had a way of doing that.