Operating systems, infrastructure, emulation, and technical history.
A lawful optical-media preservation workflow covering drive choice, disc condition, raw sectors, audio, subchannels, retries, hashes, metadata, and repeat reads.
A provenance-first ROM audit workflow using hashes and DAT metadata, with immutable originals, header rules, set semantics, tool logs, and exception review.
A hardware-grounded guide to cartridge address decoding, PRG and graphics banks, mapper registers, mirroring, IRQs, save memory, and emulator tests.
How cartridge SRAM, flash, EEPROM, and RTC registers persist; how emulators serialize them; and why wall-clock policy, atomic writes, and testing matter.
How scanline sprite evaluation, object limits, priority, overflow quirks, flicker strategies, and emulator options shape authentic retro-console graphics.
How bracketed paste wraps pasted bytes, how line editors use the markers, where trust ends, and how terminal programs enable, parse, disable, and test it.
A control-flow model for shell errexit covering tested commands, lists, pipelines, functions, subshells, command substitutions, traps, and explicit errors.
A precise model of shell file descriptors, left-to-right redirection, duplication versus paths, grouping, pipelines, persistent descriptors, and safe logging.
A recovery and prevention guide for broken terminal state: blind reset commands, stty inspection, TTY targeting, job control, exact restoration, and traps.
A POSIX getopts pattern covering OPTIND, OPTARG, leading-colon diagnostics, required operands, repeated calls, function scope, and portable limitations.