Gemini 1MB RAM expansion for Amstrad Plus

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Hi. Has anyone tested the Gemini 1MB card with CPM+ for a RAM DISK? It's totally unstable for me. The CPM+ recognizes the RAM and mounts the C: drive but it always ends up crashing after seconds or minutes of use. The card seems OK because the RAM tests are conclusive.

Note that it crashes even if I don't access the c: drive. I doubt that it's a CPM+ configuration problem (bad EMS?) because it works well with Caprice 64 or WinApe emulators. The card seems OK because the RAM tests are conclusive. What could it be ?

Configuring the card in 512kB or 1MB does not change anything.

Well, first of all. Forget about emulators. Lots of things work there, but not on the real machine. That's especially true for hardware expansions.

The Gemini works well for me on 6128plus. And also on CPC6128.

Can you please tell exactly about your system-setup and you PSU (Volts and Ampere)?
Does native OS and FutureOS work well?