vThe Real Time Clock RTC boards allows for MiSTer to have a real time clock available which can be utilised by some games on some cores. We’ve tested this with Pokemon Ruby for the GBA for example and it works great. The board is mounted to the DE10-Nano PCB. Included is a CR1220 battery to persist the time to the board even when the DE10-Nano is unpowered. These boards are professionally constructed and tested. We only use high quality components to ensure a stable product: —All boards and their ports are tested twice on 2 separate DE10-Nano boards. —All boards are professionally cleaned in an ultrasonic cleaner. —All boards are packed and in high quality anti-static bags and a box to ensure protection during transit.
This Extra Slim (XS) v2.2 board provides 32MB of SDR SDRAM memory for cores requiring a large (>512KB) of memory. 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) SDRAM boards have been checked under a microscope to ensure no solder bridges are present, then each MiSTer SDRAM board is cleaned in an ultrasonic bath to remove flux residue.