Region Free BIOS (Sega Mega CD) Updated Mar 15, 2026 · 6 min read · 0 viewing Previous FRAM Upgrade (Sega Mega CD) You can perform an upgrade on the SRAM and battery module, upgrading it to an FRAM chip , meaning y... Next BIOS File Headers (Sega Mega CD) A useful resource when dealing with BIOS files is to know how their headers look so when you open a ...