If we're going that direction, National Semiconductor had a 2 'core' COPS4 processor in 1981[1]. I have some in a tube somewhere (unused).
[1] https://www.cpushack.com/2014/08/25/national-semiconductor-c...
Yes, Retro SE also points out the Intel 8271 from 1977 was a dual core microcontroller.
Yes, Retro SE also points out the Intel 8271 from 1977 was a dual core microcontroller.