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Apparently, there was a Java port for Windows NT running on the DEC Alpha: https://archive.org/details/jdk-v1-alpha_nt

It's unclear whether it's actually a 64-bit build. Did Windows even have a 64-bit userspace on Alpha, or was it all ILP32?

Anyway, it's not really possible to implement the Java memory model on Alpha: https://www.cs.umd.edu/~pugh/java/memoryModel/AlphaReorderin... So it's not really a natural target for Java code.

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Wikipedia matches my recollection: Windows NT was actually ported to 64-bit using Alpha workstations, so there were probably some pre-release versions floating around. But by the time 64-bit Windows was ready, Alpha was a dying platform and the original release was only for the 64-bit platform with a real future, Itanium.

the 64-bit platform with a real future, Itanium

Ouch!

Yeah I also remember this. My Dad was at DEC/Compaq at the time and had access to the Windows NT prerelease. He was explaining to me why it was cool, but as an 8 year old I didn't really get it.

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