Neo Geo Diagnostic DIAG BIOS EPROM
This is a diagnostic ROM used to help diagnose faulty Neo Geo consoles
It's the ROM from SMKDAN simply burnt to an M27C1024 EPROM
If you need more information on what this does or how to use it, please visit the original site for instructions.
Included is 1 x M27C1024 with SP1.BIN written
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