The company Terraonion has announced the world’s first Mega-CD/Sega CD FPGA Optical Disc Emulator flashcart called the MegaSD. The MegaSD is an all-in-one FPGA cartridge that duplicates the Sega CD/Mega-CD hardware, which allows users to play there Sega CD backup games right from a microSD card. The MegaSD also is a general purpose flashcart allowing the use of Mega Drive and Genesis roms (cartridge games backups).
The Mega SD works on all three Genesis/Mega Drive revisions, Nomad, and Analogue Mega Sg. You read it correctly, the Sega Nomad is supported and can now play Sega CD games thanks to the Mega SD but you will have to do two simple modification to the Nomad that requires you to reconnect the cartridge audio line and SMS functionality. What would be really nice is, if the new MegaSD would work on the new Sega Genisis mini that’s coming out this year. Now that would be great but one can only hope that’s it compatible. 
Features and benefits of the MegaSD include:
• World’s First Mega-CD/Sega CD FPGA Optical Disc Emulator
• Plays both ISOS, bin+cue, and ROMS file formats
• Compatible with all original and region free patched Mega-CD/Sega CD bios
• Supports Mega Drive/Genesis, Sega CD/Mega-CD, Master System and 32X games (requires 32X add-on)
• Fully Supports original Mega Drive and Genesis hardware (Nomad included)
• Fully compatible with Analogue Mega Sg!
• Easy to use interface for navigating your collection with screenshots, genre, year and description
• Save State support for Mega Drive and Genesis Cartridge games (8 slots)
• Built in cheat engine for Mega Drive and Genesis cartridge games
• Emulates all different Genesis/Mega Drive/Master System/32x cartridge mappers.
• Stores all different Genesis/Mega Drive/Master System/32x cartridge saves onto microSD card.
• Per game Mega-CD/Sega CD Backup RAM and Cartridge RAM stored into microSD card
• Master System FM Core
• In-Game menu for a fast reboot and swapping games(Genesis/Mega Drive and Mega-CD/Sega CD)
• Enhanced Mega Drive games with CD audio and Mega-CD/Sega CD hardware (MSU1 like)
• 400GB Exfat microSD supported
MegaSD will be available for pre-order starting, at 250 Euros or $284.89 USD with shipping starting early August. To order the MegaSD, visit www.terraonion.com.