First Stage Boot (Mega CD) Updated Mar 15, 2026 · 7 min read · 0 viewing Log in or register to read the full article. Previous Boot Up Diagnostics (Mega CD) To help diagnose what is wrong there are a few common issues that can help pin-point an issue. Make ... Next Second Stage Boot (Sega Mega CD) Once the BIOS has been fully initialized it then loads the BIOS program into Program RAM, makes comm...