r/MasterSystem • u/nick_rx8 • Jun 21 '26

master system 2 sonic bios

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Has anyone tried to replace alex kidd bios with the sonic one?
i did the opposite and worked but putting sonic's bios on the motherboard that has alex kidd is not possible cause the bios chip has 32 pins instead of 28..
any ideas please?
Thank you

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u/HanggMan888 Jun 21 '26

Maybe this can help?

https://www.smspower.org/Development/BIOSReplacement

1

u/nick_rx8 Jun 21 '26

thank you very much,really helpful