*[https://unidos.cpcscene.net/ UniDOS] [[SymbOS]] To test [[X-Mass]] IDE/PATA mass-storage and [https://pulkomandy.github.io/shinra.github.io/nova.html Nova] RTC/NVRAM emulation
Rationale for picking the X-Mass, and Nova modern CPC peripherals: * The IDE/PATA mass-storage interface has been designed in 1986. So the vintage CPC experience is preserved.
* The NVRAM in Nova is useful to handle the FAT filesystem in mass-storage without using the CPC RAM (for compatibility with old CPC software) and without the performance penalty of using the mass-storage itself as NVRAM. Also the older RTC chips used on CPC peripherals do not implement the century bit (Y2K hardware bug)