First post, by chris2021
These are large endeavors for which you don't yet even have a game plan laid out. Lofty goals. You'll have to limit these to things which are practical and (likely) doablr, yet big. Really big.
I'll start -
Get MINIX running on a Northstar Dimension server.
Disassemble the Canon AS-100 firmware.
Repair a tattered, battle scarred, barely populated Atari TT motherboard.
Build the Radio Electronics RE-Robot 80188 brain (and maybe modify it to be used in a Unicorn-1).