This Extra Slim (XS-D) v2.5 board provides 128MB of SDR SDRAM memory for cores requiring a large (>512KB) of memory including the Neo Geo core. Although the DE10-Nano has built in DDR3 RAM, it has a high latency and is not suitable for the timings required of retro EDO DRAM. So if a core requires precise memory timings, then the onboard DDR3 cannot be used.
All my Extra Slim (XS-D) SDRAM boards have been checked under a microscope to ensure no solder bridges are present, then each 128MB SDRAM board is cleaned in an ultrasonic bath to remove flux residue. Every one of my boards uses the high quality Alliance memory paired with Taiyo Yuden branded capacitors on each board.
You can be confident knowing each 128MB SDRAM Extra Slim (XS-D) v2.5 board has been tested for over an hour at 130 MHz (126 MHz is the fastest any current core needs). I have also tested each with the Neo Geo console core, Acorn Archimedes (Archie) core, Game Boy Advance core, Sega Mega CD core and in Neo Geo games including Metal Slug 3 and the Bad Apple Neo Geo demo which require a 128MB module to play this ensures no issues are present.
✅ Suitable For Terasic DE10-Nano FPGA Board
✅ 128MB SDRAM Capacity
✅ 100% Of The Neo Geo ROM Library Playable
✅ Alliance Memory AS4C32M16SB-7TCN Chips
✅ Taiyo Yuden Capacitors
✅ MiSTer IO Board Compatible
✅ Fully Assembled & Tested