Features: GDEMU Optical Drive Simulation Board Card for SEGA Dreamcast. Fast game reading speed, allows you to enjoy the game. Simple installation, no welding needed, no damage to your valuable gaming device. Excellent performance ensure you enjoy your games. Great game compatibility - 100% compatible, perfect running original gdi image, and compatible with cdi image GDEMU is a memory card based replacement for the optical drive for Dreamcast console. Specification: Type: Optical Drive Board Suitable model: for SEGA Dreamcast Material: ABS Weight: Approx. 33.9g Size: Approx. 10 * 6 * 2cm / 3.9 * 2.4 * 0.8in Package list: 1 * Optical Drive Board 1 * Fixed Buckle Note: This GDEMU production is ONLY suitable for DC Va1 computer, otherwise it will damage the GDEWU. Please make sure power is not on when installing. DON'T turn on the power when installing. Memory Card Recommendation: In order to have a stable performance, below is recommendation: FOR Dongzi / Shandi . You have to format your card to FAT32 document system. It is advised that use the 32 GB card and support up to 128G card. GDEMU Document System Setting Up: Download the GDEMU 6.0 document in Memory Card,01 is a system folder which can not save games, and built 02/03/04/05,etc. Literally, you can built up to 9999 system folder. You can put CDI and GDI document in the folder and every single game in every separate folder. A and B game are supposed to putted in two folder, at the same time, A AND B,C are supposed to putted in three following folder, AND so on. You can press the button on the board to finish the record to cutover up next game after finish playing game A. Usage: Prepare one memory card and then format it to FAT32,please notice ,when you use the card over 32GB capacity, you can not use FAT32 to format the card. It is acquiescence that you can only use EXFAT. Directory Storage: GDEMU can read Number directory format under memory card. Literally, you can support 9999 Disc images in one card. Number Directory Format: 1-99 Slot is expressed by 2 digits,100-999 is expressed by 3 digits,1000-9999 is expressed by 4 digits. Operation Steps: 1.Disconnect all cables from the console 2.Remove disc from drive and close the lid 3.Detach modem add-on, place the console upside-down on a firm surface 4.Remove 4 screws located in the corners using a PH#2 screwdriver 5.Hold the console by sides with both hands and carefully rotate it to upright position IMPORTANT: Make sure the now unscrewed upper cover does not fall down. It holds down part of the GD-ROM drive assembly, which might became separated and pull/damage the ribbon cable. Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering .