Conceptual, architectural explainers — how a subsystem actually works underneath.
How source refresh rates, audio clocks, host displays, queues, and synchronization strategies create smooth motion—or periodic stutter and latency.
How to verify cartridge and disc dumps with hashes, DATs, repeatable acquisition, provenance, lossless masters, documented derivatives, and fixity audits.
Why classic systems sound different: channels, oscillators, envelopes, filters, sample memory, bus timing, and the limits composers turned into instruments.
How tile maps, pattern tables, palettes, sprites, scanlines, and hardware limits produced classic 2D graphics—and what an emulator must reproduce.
$(command) captures text; <(command) exposes a live stream as a path-like argument. Buffering, exit-status visibility, and portability differ sharply.
Shell variables and the process environment overlap but differ. Export, fork/exec, subshells, pipelines, sourcing, and Shellshock define where changes survive.
Interactive Bash editing is a library-driven state machine: keymaps, completion hooks, history, and terminal escapes all meet inside GNU Readline.
Reliable shell cleanup requires understanding signals, traps, process groups, and the important difference between a normal exit and an uncatchable termination.
PTYs and a persistent server process explain how tmux and screen survive a dropped SSH connection, not just several shells in one window.
Reconstruct the October 29, 1969 UCLA-to-SRI login from the IMP log, and separate ARPANET's first host message from later Internet myths.