^ +1 Yes, that's right, afaik.
I've tried to find some information about that i386 multi-CPU system and was partly succesful. 😀
It seems that the original Compaq SystemPro from '89 used i386 CPUs and was supported by the original relase of NT 3.1.
As it seems, it used the second processor for some i/o work, while programs ran on the primary processor.
"If you expand the criteria to include systems where the two CPUs are not on the same circuit board,
the Intel ISBC 86/12 from 1979 is a Multibus-compatible single board computer.
Later, the Compaq SystemPro from 1989 supported up to two 33 MHz 386 processors, also on their own cards,
and could run Windows NT 3.1, but this version of SystemPro only supported asymmetric multiprocessing (ASMP).
SystemPro/XL from 1992 which was based on the 486/50 was SMP.
Another interesting product is the Evergreen Rev to SMP from 1995 which
allows you to plug two 486 CPUs into a single socket on the motherboard." - snips-n-snails
"Well, AFAIK the SystemPro was asymetric as the second CPU was dedicated to I/O operation,
run by driver code, while Windows NT did only run on the first one." – Raffzahn
Source: https://retrocomputing.stackexchange.com/ques … x86-motherboard
"Time, it seems, doesn't flow. For some it's fast, for some it's slow.
In what to one race is no time at all, another race can rise and fall..." - The Minstrel
//My video channel//