SEGA/MEGA CD MULTI-BIOS BOARD INSTALLATION GUIDE



Some tips before starting :
- Choose a suitable place, with space and lighting!
- Take your time
- Use suitable tools, not a soldering iron too powerful with a huge tip ...
- You will find the few equipment for this installation in our tooling section


Reminders / Notes:
There are two versions of this kit, a version for mega/sega cd 1 and a mega/sega cd version 2
Installation is possible on all mega cd / sega cd (pal or ntsc)
Once modified in multi-bios the mega cd must be associated with a modified megadrive pal/usa/jap







MEGA/SEGA CD 1 INSTALLATION GUIDE







MEGA/SEGA CD 2 INSTALLATION GUIDE




DISABLE THE ORIGINAL BIOS (FOR MEGA CD 1 AND 2)
You must disconnect pin 20 of the original bios (OE) to the motherboard. Then you need to connect the pin to Vcc (+5V). Be careful, do not to cut the leg too close to the case of the bios, otherwise it will be impossible to solder!