I'm old enough that my heart fluttered when he mentioned the "ELF II" development board! That's some serious old school magical stuff. That used car salesman was incredibly lucky to snag such a hacker, who had no fear of jumping into hex dumps and flipping bits around, for solving problems.
https://en.wikipedia.org/wiki/ELF_II
The RCA 1802 processor even had "SEX" and "GET HIGH" instructions!
https://en.wikipedia.org/wiki/RCA_1802
https://www.atarimagazines.com/computeii/issue3/page52.php