In 1996, Atari demo coders HARD Software from Hungary created HARD Interlacing Picture (HIP), which can display 160×192 pixels in 30 shades of grey. It interlaces two modes — 80×192 with 16 shades of grey, 80×192 with 9 paletted colors — and utilizes a bug in the GTIA chip that causes one of the modes to be shifted ½ pixel, allowing for a perceived 160 pixels across.
Later, other demo coders created RIP graphics mode, which is similar to HIP, but can display 160×192 pixels in color.
Another variant is the TIP mode, which alternates between Graphics 9, 10, and 11 and can display 256 colors at about 160x100 resolution.
Read more about this topic: Software-driven Graphics Modes For The Atari 8-bit Computers
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