I've still got my Heathkit H-8. Put it together in winter 1976/spring 1977.
With a wopping 24 kB of ram, it ran an 8080 processor. Although invulnerable to
todays viruii, it was horribly slow LOL.

I also had a Tandy 1000 and was able to write some code that could emulate
interference conditions on radios using CW. It did have some interesting
capabilities on its sound generation.