Changes

! scope="col"|[[#VS. System|<abbr title="Vs. UniSystem and Vs. DualSystem emulation">VS<br/>System</abbr>]]

! scope="col"|[[#Enhancements|Enhancements]]

! scope="col"|[[#Mappers|<small>Mappers Support<br/>Level</small>]]

! scope="col"|<abbr title="Free/Libre and Open-Source Software">FLOSS</abbr>

|{{✓}}[https://www.mesen.ca/docs/configuration/preferences.html#vs-dualsystem-settings *]

|{{~}}

|Unlicensed

|{{✓}}

|{{✓}}

|{{~}}

|Unlicensed

|{{✓}}

|{{~}}<ref group=N name=Vs.DualSystemCompat>Supports Vs. UniSystem but no support for Vs. DualSystem. [https://github.com/0ldsk00l/nestopia/blob/master/source/core/vssystem/NstVsSystem.cpp#L292 *nestopia UE], [https://github.com/libretro/libretro-fceumm/blob/master/src/drivers/libretro/libretro.c#L1490 *FCEumm], [https://github.com/TASEmulators/fceux/blob/master/src/vsuni.cpp#L187 *FCEUX], [https://tasvideos.org/Forum/Topics/17971?CurrentPage=9&Highlight=443471#443471 *BizHawk]</ref>

|{{~}}

|Unlicensed

|{{✓}}

|{{✓}}

|{{~}}

|Unlicensed

|{{✓}}

|{{✗}}

|{{✗}}

|?

|{{✓}}

|{{~}}<ref group=N name=Vs.DualSystemCompat></ref>

|{{✗}}

|?

|{{✓}}

|{{✓}}

|{{✗}}

|Unlicensed

|{{✓}}

|{{✗}}

|{{~}}

|?

|{{✓}}

|{{✗}}[https://emulation.gametechwiki.com/index.php/FinalBurn_Neo#List_of_emulated_systems *]

|{{✗}}

|?

|{{NC}}

|{{✗}}

|{{✗}}

|?

|{{✓}}

|?

|?

|?

|{{✓}}

|?

|?

|?

|{{✗}}

|?

|{{~}}<abbr title="Only supports sprite replacement.">*</abbr>

|?

|{{✓}}

|?

|?

|?

|{{✓}}

|{{✓}}

|{{✗}}

|Unlicensed

|{{✓}}

|{{~}}

|{{✗}}

|?

|?

|{{✗}}

|?

|?

|{{✓}}

|?

|?

|?

|{{✗}}

|?

|?

|?

|{{✗}}

|{{✗}}

|-

|-

|[https://docs.libretro.com/library/nestopia_ue/ Nestopia_libretro]

|{{~}}<ref group=N name=Vs.DualSystemCompat></ref>

|{{~}}

|Unlicensed

|{{✓}}

|{{~}}<ref group=N name=Vs.DualSystemCompat></ref>

|{{~}}

|Unlicensed

|{{✓}}

|?

|{{~}}<abbr title="Only supports netplay">*</abbr>

|?

|{{✗}}

|?

|?

|?

|{{✗}}

|?

|?

|?

|{{✗}}

|?

|?

|?

|{{✓}}

|?

|?

|?

|{{✗}}

|?

|?

|?

|{{✗}}

|?

|?

|?

|{{✗}}

|?

|?

|?

|{{✓}}

|?

|?

|?

|{{✗}}

|?

|?

|?

|{{✓}}

|?

|?

|?

|{{✗}}

|{{✓}}

|{{✗}}

|Unlicensed

|{{✓}}

|{{✗}}

|-

|-

|Nestopia

|{{~}}<ref group=N name=Vs.DualSystemCompat></ref>

|{{~}}

|Unlicensed

|{{✓}}

|{{✗}}

|{{~}}

|?

|{{✗}}

|{{~}}<ref group=N name=Vs.DualSystemCompat></ref>

|{{~}}

|Unlicensed

|{{✓}}

|?

|?

|Unlicensed

|{{✓}}

|?

|?

|?

|{{✓}}

|?

|?

|?

|{{✗}}

|?

|?

|?

|{{✓}}

|?

|?

|?

|{{✗}}

|?

|?

|?

|{{✗}}

|?

|{{~}}

|?

|{{✗}}

|?

|?

|Official

|{{✗}}

|{{✗}}

|{{✗}}

|?

|{{✗}}

|?

|?

|?

|{{✓}}

|?

|?

|?

|{{✗}}

|?

|?

|?

|{{✓}}

|?

|?

|?

|{{✓}}

|?

|?

|?

|{{✓}}

|?

|?

|?

|{{✗}}

|{{✗}}

|-

|-

|[https://zardam.github.io/webnofrendo numworks-nofrendo]

|?

|?

|?

|{{✓}}

|?

|{{✗}}

|?

|{{✓}}

|?

|{{✗}}

|?

|{{✓}}