So, I finished resurrecting my mainframe the other day.
When I was in Kansas City for KansasFest, I bought an RS/6000 7011-250, which uses the smallest chassis capable of holding 32-bit MCA cards that IBM ever produced – for comparison, I’d say it’s about the size of a Quadro 610 or Power Mac 6100, albeit a bit deeper. (It was also the first PowerPC machine ever produced (predating the PowerPC Macs by a few months), using a 66 or (in my machine) 80 MHz CPU.) This allowed me to physically downsize the machine significantly with minimal loss in functionality.
I installed the P/390 card set and installed AIX while at KansasFest, but was unable to get the mainframe actually running for several reasons. Ended up putting the project on hold for various reasons (including building the Mimeo).
Lately, decided to get back at it. Continue reading