Software-driven Graphics Modes For The Atari 8-bit Computers - HARD Interlacing Picture

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.

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