If you have ever wanted to design your own computer or wondered what was behind the most successful microcomputer of the 1980s, then this is the book for you. For the first time, the inner working of the Sinclair ZX Spectrum's custom chip and heart of the computer, the Ferranti ULA, is exposed in minute detail.

Freeze 24 03 16 Hazel Moore Stress Response Xxx... Today

That night she dreamed in fluorescent white. She was suspended in a lab, under glass, like a specimen or a comet. A woman in a grey coat recorded the twitch of Hazel’s left eyelid, made a notation with a quiet pen. A screen pulsed: 24:03:16 — then the display changed to graphs that looked like mountains and the sound of her own name everywhere, a chorus of consequence. She woke with the taste of metal in her mouth and a new understanding: the letter had been less an accusation than a diagnostic. Someone had measured her. Someone had decided she had error value.

There was curiosity in her panic. Hazel is the kind of person who catalogues her own reactions to reaction — she kept a list of small defeats: missed trains, arguments that escalated like bad weather, the times sleep had abandoned her. Each entry was timestamped. She added a line now: 24 03 16 — envelope. Notation: Stress Response. Emotional valence: unreadable. Follow-up: investigate. Freeze 24 03 16 Hazel Moore Stress Response XXX...

Hazel pressed her thumb against the glass of the mug until the fingerprint blurred. Outside, the city had already learned to speak in beeps and schedule: the tram, the garbage drone, the mural that changed colors with the weather. Inside, her apartment kept old things that didn’t adapt. A chipped enamel kettle, a stack of notebooks with spines softened by many nights, a photo of someone whose smile she’d once matched and now could’t remember whether she had earned. That night she dreamed in fluorescent white

XXX: she tried filling the blanks like a child completing a puzzle. Classified. Incomplete. Kisses? The last option made her laugh, brief and brittle. Of all possible codings, redaction was the most intimate; it implies things worth hiding, worth preserving. The sentinel’s ink that blackened out words meant someone had evaluated what she was permitted to know. It also meant someone had decided what to preserve. Secrets folded in darkness are warm with meaning. A screen pulsed: 24:03:16 — then the display