I got into software in the late 1970s, so my first couple of decades involved lots of low-level systems and designs. My world had a lot of assembly code, interrupt handlers, and driver routines. I can’t say I miss living in that realm, but it’s still fun to revisit sometimes.

A rare place that still happens is when I get to thinking about how I might design an operating system should I ever chose to (these days a dubious and foolish choice, at best).

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