...
° I have tried different ADF and some do not work (for example if I put Workbench 1.3 I receive some errors during startup even if Workbench starts): am I right and Vampire is not 100% compatible with "original" Amigas (I am supposing not even 90% compatible...);
...
Depends what you mean by "original" Amigas and how you choose to quantify compatibility. Amigas came with a variety of different CPUs at different speeds, with different memory configurations, chip sets, expansions, operating system versions (both firmware and software), filesystems etc. Each variation introduces possibilities for incompatibilities, in that regard the Vampire is no different to any other upgrade. The Vampire adds a LOT to a basic A500 or A600 so the potential areas for poorly written software to break are considerable however the Apollo team have done a lot to minimise these and continue to make improvements (using alternative kickstarts has recently been demonstrated as a future option). The vampire is also the only option to add compatibility with AGA software to the non-AGA Amigas in the future.
