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− | | + | #redirect [[sega:Nemesis compression]] |
− | '''Nemesis compression''' is the method created by [[Sega]] to reduce the amount of space that graphics data takes up in a [[Sega Megadrive]] [[ROM]]. A decompression algorithm takes the compressed data, unpacks it and transfers it to the [[VRAM]]. The graphics can then be displayed on the screen. The Nemesis format is specifically designed for Megadrive graphics, as it relies on the length of the data being divisible by $20 (hex), which is the exact number of bytes in a single [[8x8 tile]]. Although Nemesis is also used for 16x16 [[block mappings]] in Sonic CD, because the data conforms to the $20 rule.
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− | Nemesis compression is named after [[Nemesis]], the hacker who first discovered the format and created a program to decompress it. The format is used in numerous Megadrive games, especially [[Sonic the Hedgehog]] games. | |
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− | ==Games which use Nemesis compression==
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− | *Bare Knuckle 2 (Beta)
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− | *[[Flicky]] (Megadrive)
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− | *[[Sonic & Knuckles]]
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− | *[[Sonic CD]] ([[Mega CD]])
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− | *[[Sonic Crackers]]
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− | *[[Sonic Eraser]]
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− | *[[Sonic the Hedgehog (Genesis)]]
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− | *[[Sonic the Hedgehog 2]]
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− | *[[Sonic the Hedgehog 3]]
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− | [[Category:Hacking Information]]
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