Fully assembled and tested MiSTer SDRAM XS-D v2.5 128MB add-on board with Alliance memory chips for the DE10-Nano.
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 KEMET branded capacitors on each board.