CRG | Can I fix this NEO GEO calendar error? @CRG | Uploaded March 2023 | Updated October 2024, 2 hours ago.
Last year I bought myself a NEO GEO MVS, its one of those systems I've always dreamt of owning so got this from Aliexpress along with a supergun and all in one game cart. All was going well until just before Christmas when it threw up a calendar error. I've been missing my arcade games fix so let try to fix it or least find a work around...

NEOGEO schematics - wiki.neogeodev.org/index.php?title=Schematics
NEOGEO unibios - http://unibios.free.fr/

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End music - Modspire by @NaokisRC
Music bed - Lorraine's Friends by @Momentvm

Chapters
00:00 Intro
00:48 Closer look
04:09 Is it just the crystal?
04:38 What about the RTC chip?
08:36 Voltage levels?
11:44 Calendar error checks
17:04 The soldering bit
20:29 Unibios
27:35 Testing
31:35 Conclusion and credits