Main port is now amd64, but microkernel architecture allows to easily port FreeVMS to new architectures.
Today, development is done on amd64 architecture. IA32 is not supported and there is no plan to port FreeVMS on 32 bits architecture. Read more »
PPC64 architecture is supported by FreeVMS L4 microkernel but FreeVMS kernel does not support PPC64 yet. Read more »