This is also the workaround to have n64 saves work more optimally.
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Got KI/KI2 Running. But, do not get too excited
It isn't very optimal, speed wise!
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Today's Core Set update includes:
Updated Genesis Plus GX, FBA 2012, Fceumm in RetroArch, Added FDS Bios Support, Added MAME 2003 Variant which can run KI/KI2 (albeit very slowly!). This Variant is located in the Dependencies & Extras Folder. Due to the MAME 2003 that is in main set, being able to run Sega System 32 Games, the KI/KI2 capable one will not be replacing it. It is just there for testing purposes.
https://github.com/KMFDManic/NESC-SNESC-Modifications/releases
Enjoy
And, here is a video of me doing Killer Instinct Arcade Test!