He does. He's been a great help as I try to piece together enough stuff to function as a system element. And thank you for that redbook link; I have a load of stuff, but somehow missed that one. Thanks!
The MP3000 (Multiprise 3000) is the smallest mainframe IBM ever made, weighing in at only about 300 lbs. Using the vanilla Hercules, it can be MIPS limited to act mostly like a MP3000 System/390 machine and run the same OSes.