With my rough idea I explored yesterday of what collapse-era computing might look like, what sort of OS would fit?
Most places who care should be able to build 1970s if not 1980s-era chips, maybe even 2000-era. If we can continue obtaining wafers, not guaranteed!
The biggest challenge would be designing large RAM, & other datastorage.
Keyboard input & audio output would probably be the most feasible I/O, with mice & vector-monitors being secondary.
1/2?