On 10/25/18 11:49 AM, Chuck Guzis via cctalk wrote: > Dunno, the mind is foggy on this detail, since I never played with the > beast. But it seems to me that there was at least one "too slow" MPU > out there in production at some point. There is the moto MC14500 http://bitsavers.org/components/motorola/14500/MC14500B_Industrial_Control_Unit_Handbook_1977.pdf