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Comment on The Alpha 21264 CPU: NT's Greatest RISC (1998)

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It's important in the historical context of the Alpha AXP to also remember the DEC PRISM architecture. Canceled in 1988. One of many architectures killed off by DEC.

https://en.wikipedia.org/wiki/DEC_PRISM

Killing Prism sent David Cutler into the arms of Microsoft.

Another dead architecture was Jupiter: https://en.wikipedia.org/wiki/Jupiter_project

Killing Jupiter sent many of DEC's DECsystem-10 customers to IBM.

Years later, they both seem like bad decisions.

Jupiter was just a PDP-10, I don't think killing Jupiter was bad. The VAX was insanely successful and adopted by a large amount of people. And Jupiter was a very expensive project and it basically failed to do what it wanted to do and was already late. They stopped with PDP-10 because nobody seemed to be able to make a next generation architecture work.

Arguably, all ECL projects should have been killed, even Venus.

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