On 9/26/18, Theodore Y. Ts'o <tytso at mit.edu> wrote: > > That's not that only CPU for which this was true. The IBM PC/RT > (e.g., the 6150) CPU was originally designed to be used as a > typewriter controller. The CPU in the IBM 5100 was a 16-bit processor originally designed for use in System/370 I/O peripheral controllers. -Paul W.