Will Power Chips Get A Converged Arm Instruction Set Like Z Mainframe CPUs?

August 31, 2026 Timothy Prickett Morgan

One a decade for the past six decades, Big Blue launches an effort to converge its diverse system architectures. It almost never works, with the exception of the launch of the System/360 mainframes in April 1964 and the AS/400 minicomputers in June 1988. And to be fair, the AS/400 was itself based in part on technologies created in a failed convergence effort.

Back in 1986, the “Fort Knox” project sought to converge the System/4300 air-cooled, entry mainframe lines with the System/38 (from 1978) and the System/36 (from 1983), and it failed. But in the failure, the Rochester Labs took some …