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| − | '''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.
| + | #redirect [[sega:Nemesis compression]] |
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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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| − | ==Sega Megadrive games which use Nemesis compression==
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| − | *Alien Storm
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| − | *Bare Knuckle 2 (Beta)
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| − | *Castle of Illusion
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| − | *Columns
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| − | *[[Dr. Robotnik's Mean Bean Machine]]
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| − | *ESWAT
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| − | *Fatal Labyrinth
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| − | *[[Flicky]]
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| − | *Forgotten Worlds
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| − | *Ghostbusters
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| − | *Ghouls 'n' Ghosts
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| − | *[[Golden Axe]]
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| − | *Golden Axe 2
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| − | *Golden Axe 3
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| − | *[[Knuckles' Chaotix]] ([[32X]])
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| − | *Mega Anser
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| − | *Mercs
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| − | *Moonwalker
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| − | *Phantasy Star II ([[SegaNet]] text adventures)
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| − | *PulseMan
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| − | *Quackshot
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| − | *Revenge of Shinobi
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| − | *[[Ristar]]
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| − | *Sega/Mega CD BIOS ([[Mega CD]])
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| − | *Shadow Dancer
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| − | *[[Sonic & Knuckles]]
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| − | *[[Sonic CD]] ([[Mega CD]])
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| − | *[[Sonic Compilation]] (menu)
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| − | *[[Sonic Crackers]]
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| − | *[[Sonic Eraser]]
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| − | *[[Sonic Jam]] ([[Saturn]])
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| − | *[[Sonic the Hedgehog (Genesis)|Sonic the Hedgehog]]
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| − | *[[Sonic the Hedgehog 2]]
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| − | *[[Sonic the Hedgehog 3]]
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| − | *Streets of Rage
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| − | *Streets of Rage 3
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| − | *Strider
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| − | *Super Hang-On
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| − | *Super Monaco GP
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| − | *World Cup Italia '90
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| − | *World of Illusion
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| − | [[Category:Hacking Information]]
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