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|website = [http://www.zsnes.com/ ZSNES.com]
|source = [[sourceforge:projects/zsnes/files/zsnes/|SourceForge]]
|license = GNU GPL v2GPLv2}}
'''ZSNES''' is a [[Super Nintendo emulators|Super Famicom (SNES) emulator]] written in [[wikipedia:x86|x86]] assembly. It was originally made in 1997 and was one of the most popular Super Nintendo emulators from late nineties to mid-2000s, but now is obsolete and has not been updated since 2007. Most people now just use ZSNES for its excellent netplay code.
[[File:Kirby3-forest.gif|frame|SNES Pseudo Hi-Res translucency on ''new'' graphics engine]]
* Compatibility is lower than modern emulators due to low accuracy to real SNES system.
* Games crashing: Der Langrisser (freezes after 2-3 2–3 hours), Super Mario RPG (freezes in many different points of the game), Star Ocean and many other games have freezing and crashing issues.
* Bad sound emulation: Many games sound inaccurate on ZSNES. ZSNES's audio timer isn't floating point so there are timing artifacts in the music. ZSNES doesn't emulate release values of ADSR so held notes will sound poor.
* Many of the co-processors, which are actually on the game cartridges, are emulated in strange ways. For example, Super FX is not clocked correctly; Star Fox runs twice as fast as it should.
