A RISC-V mainframe would be an interesting and funny outcome.

Only after RISC-V has gone through the same evolution as x86 and ARM and renamed itself CISC-V. :)

Hey now, ARM managed to keep their "R".

Yeah, but only because ACM was already taken. ;)

Not quite.

Here's the latest principles of operation:

http://publibfp.dhe.ibm.com/epubs/pdf/dz9zr011.pdf

And the architecture reference summary:

http://publibfp.dhe.ibm.com/epubs/pdf/dz9zs009.pdf

It was a reference to the movie Pi :) "It's a Ming Mecca chip! Those aren't even declassified yet!"

Applied Phlebotinum: The "Ming Mecca" computer chip that Dawson uses to bait Max, and provides Euclid the processing power to fully realize the number. Max is disbelieving that the firm can even provide it (because they're classified technology), but Dawson simply says that the firm has plenty of connections. https://tvtropes.org/pmwiki/pmwiki.php/Film/Pi

But in seriousness. Thanks for the links. Also I didn't know there is that much indepth information about IBM mainframes on Wikipedia. Don't mind if I do, this will be a late night!