Subj : Re: Recent finds? To : Oli From : Jeff Date : Fri Feb 04 2022 13:15:34 On 04 Feb 2022, Oli said the following... Ol> > aL> > Just today I got a KP1801BM1 from the Russian Federation. Ol> > Today, with significant help from a Russian Facebook friend, I was able Ol> > get ahold of the technical documentation for the BP1801BM1 (pinouts, Ol> > timing diagrams, etc.), in Russian, of course. It's a very interesting Ol> > chip, and now I want three more! It turns out that two of the pins are Ol> > used to encode the "CPU number" of the processor, 0-3, and they have Ol> > built-in circuitry to arbitrate access to the system bus based in this Ol> > number. Ol> multi-processor? :-] It certainly appears so! Jeff. --- Mystic BBS v1.12 A46 2020/08/26 (Raspberry Pi/32) * Origin: Cold War Computing BBS (21:1/180) .